CN206754049U - A kind of hydraulic jack with buffering ring - Google Patents

Abstract

The utility model discloses a kind of hydraulic jack with buffering ring, including cylinder body (6), earrings (1), cylinder head (14), piston rod (3), piston (8) and guide sleeve (5), in addition to：First O-ring (15), for realizing the sealing of the piston (8) and cylinder body (6)；Second O-ring (16), for realizing the sealing of the piston (8) and piston rod (3)；3rd O-ring (20), for realizing the sealing of the guide sleeve (5) and cylinder body (6)；4th O-ring (22), for realizing the sealing of the guide sleeve (5) and piston rod (3)；Buffering ring (21), for providing support force for the 3rd O-ring (20).Hydraulic jack of the present utility model, buffering ring provide support force for the O-ring, and progressively alleviate the pressure of O-ring by discharging elastic potential energy, and gentle realizes pressure-bearing, avoids hydraulic oil from breaking through the O-ring, so as to realize good sealing, avoids oil leak.

Description

A kind of hydraulic jack with buffering ring

Technical field

The utility model belongs to engineering mechanical device technical field, more particularly, to a kind of hydraulic pressure with buffering ring Oil cylinder.

Background technology

Hydraulic jack is the crucial executive component in hydraulic system or equipment, and the quality of its sealing property directly affects entirely The reliability of system work, so its sealing especially piston rod and the dynamic sealing at guide sleeve, are always domestic and international hydraulic pressure row The research topic of industry.

In oil cylinder in use, it is at most generation oil leak at piston rod seals to break down, its reason is due to sealing Part occur wearing destroy or oil film end of travel ring-type accumulation and occur dripping phenomenon under oil stream.Come from the life-span of sealing ring Consider, the sealing ring of piston rod should allow have oil leak to a certain degree, but as used for a long time, this small amount of oil leak can also tire out Product, although this is not hindered directly complete machine action, if operator's improper use, transition Leakage can be also produced, is made It is harsher with condition, more easy oil leakage.Micro leakage is often ignored, but leaks more than the one natural sinkings that can cause oil cylinder or effect Rate reduces.This micro leakage can also make fluid accumulation produce pressure between two sealing rings.This pressure is sometimes up to Extruded to very high, or even seal from sealing mounting groove, make seal damaged, ultimately result in oil cylinder failure.

Patent CN105465096 discloses a kind of hydraulic jack, including cylinder body, is respectively arranged on the end cap at cylinder body both ends and leads The piston cover, being movably connected in cylinder body and the piston rod being connected with piston, the one end being connected with piston on the piston rod Provided with ring-shaped step, ring-shaped step is provided with annular groove, and the piston bush is loaded on ring-shaped step and is connected in annular groove On, concave station rank is set on the piston, one valve of installation in concave station rank, the valve sets a long stripes through hole, valve with Piston to run together, when valve encounters end cap and leads lid during exercise, play overflow valve action.But patent Hydraulic jack disclosed in CN105465096 by valve during exercise with end cap and leading lid and contacting, so as to play a part of overflow, When in-oil cylinder pressure is larger, the valve is easily damaged, so as to cause oil leakage phenomenon, finally damages hydraulic jack；Moreover, The valve is located in the concave station rank on the piston, complicated, easily blocks, and maintenance is inconvenient, easily causes whole liquid Compressing cylinder fails.

Utility model content

For the disadvantages described above or Improvement requirement of prior art, the utility model provides a kind of hydraulic oil with buffering ring Cylinder, its object is to by setting buffering ring in the side of O-ring, when the pressure in hydraulic jack is smaller, the O-ring can To realize the excellent sealing of hydraulic jack；When the pressure in hydraulic jack is larger, the buffering ring provides branch for the O-ring Support force, and progressively alleviate by discharging elastic potential energy the pressure of O-ring, so as to which gentle realizes pressure-bearing, avoid hydraulic oil from breaking through The O-ring, so as to realize good sealing, avoid oil leak.

To achieve these goals, the utility model provides a kind of hydraulic jack with buffering ring, including cylinder body, difference The earrings and cylinder head that are connected with the cylinder body both ends, the piston rod located at the cylinder interior, it is sheathed on described piston rod one end Piston and the guide sleeve between the piston rod and cylinder body, in addition to：

First O-ring, the first groove of annular is circumferentially provided with the periphery wall of the piston, and first O-ring is set In first groove, for realizing the sealing of the piston and cylinder body；

Second O-ring, the piston rod are circumferentially provided with the second groove of annular, institute on one end periphery wall of piston The second O-ring is stated in second groove, for realizing the sealing of the piston and piston rod；

3rd O-ring, the 3rd groove of annular, the 3rd O-ring are circumferentially provided with the periphery wall of the guide sleeve In the 3rd groove, for realizing the sealing of the guide sleeve and cylinder body；

4th O-ring, the 4th groove of annular, the 4th O-ring are circumferentially provided with the internal perisporium of the guide sleeve In the 4th groove, for realizing the sealing of the guide sleeve and piston rod；And

Buffering ring, it is located in the 3rd groove, and is presented axially in the outside of the 3rd O-ring, itself and institute The 3rd O-ring abutting is stated, for providing axial support force for the 3rd O-ring.

Preferably, the hydraulic jack also includes dust ring, and it is located between the guide sleeve and the piston rod, and is leaned on The end of the nearly guide sleeve.

Preferably, the hydraulic jack also includes plug cock and the 5th O-ring, the 5th O-ring located at the plug cock and Between cylinder body.

Further, the 5th groove is provided with the inside of the guide sleeve, being provided with axle in the 5th groove encloses.

Further, the hydraulic jack also includes swivel nut, and it is sheathed on the end of the cylinder body, for realizing the work Stopper rod is fixedly connected with cylinder body.

Further, the outside of the swivel nut is provided with fluting tapered end holding screw.

Further, the hydraulic jack also includes round nut, and it is located between the earrings and piston rod.

Further, the hydraulic jack also includes hex nut, its located at the cylinder body end and the cylinder head it Between.

In general, by the contemplated above technical scheme of the utility model compared with prior art, can obtain down Row beneficial effect：

(1) hydraulic jack of the present utility model, by setting buffering ring in the side of O-ring, when the pressure in hydraulic jack When power is smaller, the O-ring can realize the excellent sealing of hydraulic jack；It is described slow when the pressure in hydraulic jack is larger Rush ring and provide support force for the O-ring, and progressively alleviate the pressure of O-ring by discharging elastic potential energy, so as to gentle reality Existing pressure-bearing, avoids hydraulic oil from breaking through the O-ring, so as to realize good sealing, avoids oil leak.

(2) hydraulic jack of the present utility model, by the outside of the buffering ring, setting dust ring, can effectively prevent Only external dust penetrates into the hydraulic jack, avoids causing hydraulic jack to block, so as to improve the use longevity of hydraulic jack Life.

Brief description of the drawings

Fig. 1 is a kind of structural representation of the hydraulic jack with buffering ring of the utility model embodiment.

In Fig. 1, same reference represents identical structure and part, wherein：1- earrings, 2- round nuts, 3- pistons Bar, 4- swivel nuts, 5- guide sleeves, 6- cylinder bodies, 7- labels, 8- pistons, 9- holes circle, 10- hex nuts, 11- split pins, 12- oil Plug, the O-rings of 13- the 5th, 14- cylinder heads, the O-rings of 15- first, the O-rings of 16- second, 17- rivets, 18- axles circle, 19- fluting cones Hold holding screw, the O-rings of 20- the 3rd, 21- buffering rings, the O-rings of 22- the 4th, 23- dust rings, 24- circlip for holes, 25- Plain radial bearing.

Embodiment

In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining this Utility model, it is not used to limit the utility model.It is in addition, involved in each embodiment of the utility model disclosed below As long as and to technical characteristic each other do not form conflict can be mutually combined.

Fig. 1 is a kind of structural representation of the hydraulic jack with buffering ring of the utility model embodiment.As shown in figure 1, The hydraulic jack includes：Earrings 1, round nut 2, piston rod 3, swivel nut 4, guide sleeve 5, cylinder body 6, label 7, piston 8, hole with circle 9, Hex nut 10, split pin 11, plug cock 12, the 5th O-ring 13, cylinder head 14, the first O-ring 15, the second O-ring 16, rivet 17, Axle is with circle 18, fluting tapered end holding screw 19, the 3rd O-ring 20, buffering ring 21, the 4th O-ring 22, dust ring 23, hole bullet Property back-up ring 24 and plain radial bearing 25.

As shown in figure 1, earrings 1 is connected by round nut 2 with the piston rod 3, the piston rod 3 is sheathed on the cylinder body On 6, the swivel nut 4 is connected by tapered end holding screw 19 of slotting with the cylinder body, and the piston 8 is sheathed on the piston rod 3 One end, the one end of the cylinder body 6 is connected by hex nut 10 with the cylinder head 14.The piston 8, the end of piston rod 3 Rodless cavity room is formed between portion and hex nut 10, rod chamber room is formed between the piston rod 3, guide sleeve 5 and cylinder body 6.

As shown in figure 1, the first groove in a ring is circumferentially provided with the periphery wall of the piston 8, first O-ring 15 are located in first groove, for realizing the sealing between piston and cylinder body；The piston rod is outside one end of piston The second groove in a ring is circumferentially provided with perisporium, second O-ring 16 is located in second groove, for realizing work Sealing between plug 8 and piston rod 3；Meanwhile first O-ring 15 and the second O-ring 16 separate the rodless cavity room and rod chamber The connection of room.

As shown in figure 1, the 3rd groove in a ring is circumferentially provided with the periphery wall of the guide sleeve 5, the 3rd O shapes Circle 20 is located in the 3rd groove, for realizing the sealing between the guide sleeve and cylinder body；The internal perisporium of the guide sleeve 5 On be circumferentially provided with the 4th groove in a ring, the 4th O-ring 22 is located in the 4th groove, for realizing described lead To the sealing between set and piston rod.

Sealing between cylinder body and piston is realized by the first O-ring, by the second O-ring realize piston and piston rod it Between sealing；The sealing between guide sleeve and cylinder body is realized by the 3rd O-ring；Guide sleeve and work are realized by the 4th O-ring Sealing between stopper rod, so that the hydraulic jack has good sealing property.

As shown in figure 1, the buffering ring 21 is located in the 3rd groove, and is located at the outside of the 3rd O-ring 20, For providing support force for the 3rd O-ring 20；When the pressure in hydraulic jack is smaller, the 3rd O-ring 20 can be with Realize the excellent sealing of hydraulic jack；When the pressure in hydraulic jack is larger, the buffering ring 21 is the 3rd O-ring 22 Support force is provided, and progressively alleviates the pressure of O-ring by discharging elastic potential energy, so as to which gentle realizes pressure-bearing, and can be real Now good sealing, avoids oil leak.

As shown in figure 1, the 5th O-ring is provided between the plug cock 12 and cylinder body 6, for realizing the plug cock 12 and cylinder body Sealing between 6.Sealing between plug cock and cylinder body is realized by the 5th O row sealing rings, so as to ensure the oil cylinder in filling oil Good seal afterwards, avoid the occurrence of oil leakage phenomenon.

As shown in figure 1, between the guide sleeve 5 and the piston rod 3, close to the end of the piston rod, provided with anti- Konisphere 23, it can effectively prevent external dust from penetrating into the hydraulic jack, avoid causing hydraulic jack to block, so as to improve The service life of hydraulic jack.

As it will be easily appreciated by one skilled in the art that preferred embodiment of the present utility model is the foregoing is only, not For limiting the utility model, any modification of all made within spirit of the present utility model and principle, equivalent substitution and change Enter, should be included within the scope of protection of the utility model.

Claims (8)

1. a kind of hydraulic jack with buffering ring, including cylinder body (6), the earrings (1) that is connected respectively with the cylinder body (6) both ends With cylinder head (14), located at the internal piston rod (3) of the cylinder body (6), be sheathed on the piston (8) of described piston rod one end and set Guide sleeve (5) between the piston rod (3) and cylinder body (6), it is characterised in that also include：

First O-ring (15), the first groove of annular, first O-ring are circumferentially provided with the periphery wall of the piston (8) (15) it is located in first groove, for realizing the sealing of the piston (8) and cylinder body (6)；

Second O-ring (16), the piston rod (3) are circumferentially provided with the second of annular on one end periphery wall of piston (8) Groove, second O-ring (16) are located in second groove, for realizing the close of the piston (8) and piston rod (3) Envelope；

3rd O-ring (20), the 3rd groove of annular, the 3rd O shapes are circumferentially provided with the periphery wall of the guide sleeve (5) Enclose (20) to be located in the 3rd groove, for realizing the sealing of the guide sleeve (5) and cylinder body (6)；

4th O-ring (22), the 4th groove of annular, the 4th O shapes are circumferentially provided with the internal perisporium of the guide sleeve (5) Enclose (22) to be located in the 4th groove, for realizing the sealing of the guide sleeve (5) and piston rod (3)；And

Buffering ring (21), it is located in the 3rd groove, and is presented axially in the outside of the 3rd O-ring (20), its Abutted with the 3rd O-ring (20), for providing axial support force for the 3rd O-ring (20).

2. a kind of hydraulic jack with buffering ring according to claim 1, it is characterised in that the hydraulic jack is also Including dust ring (23), it is located between the guide sleeve (5) and the piston rod (3), and close to the end of the guide sleeve (5) Portion.

3. a kind of hydraulic jack with buffering ring according to claim 1, it is characterised in that the hydraulic jack also wraps Plug cock (12) and the 5th O-ring (13) are included, the 5th O-ring (13) is located between the plug cock (12) and cylinder body (6).

A kind of 4. hydraulic jack with buffering ring according to claim 1 or 2, it is characterised in that the guide sleeve (5) Inner side be provided with the 5th groove, axle circle (18) is provided with the 5th groove.

A kind of 5. hydraulic jack with buffering ring according to claim 1 or 3, it is characterised in that the hydraulic jack Also include swivel nut (4), it is sheathed on the end of the cylinder body (6), for realizing the fixation of the piston rod (3) and cylinder body (6) Connection.

6. a kind of hydraulic jack with buffering ring according to claim 5, it is characterised in that outside the swivel nut (4) Side is provided with fluting tapered end holding screw (19).

A kind of 7. hydraulic jack with buffering ring according to claim 1 or 2, it is characterised in that the hydraulic jack Also include round nut (2), it is located between the earrings (1) and piston rod (3).

A kind of 8. hydraulic jack with buffering ring according to claim 1 or 3, it is characterised in that the hydraulic jack Also include hex nut (10), it is between the end of the cylinder body (6) and the cylinder head (14).