Guide sleeve and hydraulic cylinder

Abstract

The utility model provides a guide sleeve and a hydraulic cylinder, the guide sleeve is fixed at the end part of a cylinder barrel and plays a role in supporting, guiding and sealing a piston rod of the hydraulic cylinder; an oil storage tank is arranged in the guide sleeve to lubricate the seal and the piston rod; the interior of the guide sleeve is integrally welded with copper to form a copper sleeve for supporting and guiding; an annular sealing groove is machined in the guide sleeve and used for installing a sealing piece, and the sealing effect on a small cavity of the piston rod is achieved. An annular waterproof groove is machined in the guide sleeve and used for installing a waterproof sealing piece, and the annular sealing groove is prevented from being rusted. Therefore, the guide sleeve structure provided by the utility model has the advantages of automatic oil storage, low friction coefficient, strain resistance and water resistance.

Description

TECHNICAL FIELD

[0001] The utility model relates to a guide sleeve belongs to hydraulic cylinder technical field. BACKGROUND

[0002] Hydraulic cylinder is the pressure drive execution element of the conversion of hydraulic energy into mechanical energy, is applied more and more widely in engineering machinery field, and use working condition is more and more complex, and the reliable line and stability requirement of oil cylinder are also more and more high, and the problems such as shaking abnormal sound, guide sleeve pull rod, starting pressure, sealing groove corrosion are increasingly prominent.

[0003] The prior art increases the support span by increasing the length of the guide sleeve, thereby enhancing the lateral force of the oil cylinder and the stability of the oil cylinder in operation. With the increase of the guide length, the number of support rings inside the guide sleeve also increases accordingly. The overall friction coefficient and the starting pressure of the oil cylinder will increase, and dry friction is prone to cause the oil cylinder to shake and make abnormal sound. If the support is changed to soft support, the friction coefficient can be reduced, and the problem of oil cylinder shaking can also be solved. However, the anti-unbalanced load capacity will be greatly reduced, and the piston rod is prone to be damaged. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model provides a guide sleeve which is automatically oil-stored, has low friction coefficient, is anti-damage and waterproof.

[0005] The utility model realizes the following technical scheme:

[0006] In the first aspect, the utility model provides a guide sleeve which is fixed at the end position of the cylinder barrel and plays a supporting, guiding and sealing role for the hydraulic cylinder piston rod. The guide sleeve is internally provided with an oil storage groove for lubricating the seal and the piston rod. The guide sleeve is integrally welded with copper inside to form a copper sleeve which plays a supporting and guiding role. An annular sealing groove is processed inside the guide sleeve for installing a sealing element to play a sealing role for the small cavity of the piston rod. An annular waterproof groove is processed inside the guide sleeve for installing a waterproof sealing element to avoid the rusting of the annular sealing groove.

[0007] In some embodiments, an annular dustproof groove is processed inside the guide sleeve for installing a waterproof dustproof ring.

[0008] In some embodiments, the annular dustproof groove is adjacent to the outer side end face of the guide sleeve and serves as the first waterproof and dustproof protective barrier.

[0009] In some embodiments, an annular anti-loosening groove is processed outside the guide sleeve for installing an anti-loosening top screw to avoid the loosening of the threads of the guide sleeve.

[0010] In some embodiments, the annular anti-loosening groove is arranged at the outer radial circumferential thread of the guide sleeve.

[0011] In some embodiments, the oil storage groove extends inwardly in a spiral structure from the inner side end surface of the guide sleeve to the middle part of the guide sleeve.

[0012] In some embodiments, the oil storage groove is arranged in the copper sleeve, and the oil storage groove is not communicated with the inner circumferential surface of the guide sleeve.

[0013] In some embodiments, the annular sealing groove is two, wherein the annular sealing groove I is adjacent to the oil storage groove, and the annular sealing groove II is located between the annular sealing groove I and the annular waterproof groove.

[0014] In some embodiments, the annular sealing groove and the annular waterproof groove both extend into the guide sleeve after passing through the copper sleeve.

[0015] In the first aspect, the utility model provides a kind of hydraulic cylinder, including above-mentioned guide sleeve.

[0016] The utility model has the beneficial effects that:

[0017] 1) guide sleeve built-in oil storage groove, low friction coefficient, small oil cylinder starting pressure, can be lubricated to sealing and piston rod, reduce the probability of oil cylinder shaking;

[0018] 2) guide sleeve inside is welded copper as a whole, plays the role of supporting guide, without additional processing support groove, anti-bias load prevents pull rod, and space is compact;

[0019] 3) guide sleeve inside is processed waterproof groove, prevents sealing groove corrosion, widens the use range of hydraulic cylinder;

[0020] 4) guide sleeve is provided with anti-loose groove, and top screw is reliable in anti-loose, and space is saved. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are part of the present application, serve to provide a further understanding of the present application, and the illustrative embodiments of the present application and their descriptions serve to explain the present application, but do not constitute undue limitations on the present application. Obviously, the drawings described below are only some embodiments, and other drawings can be obtained from these drawings without creative labor for those skilled in the art.

[0022] In the drawings:

[0023] Figure 1 It is a cross-sectional view of the guide sleeve of the utility model.

[0024] Reference signs: 1-oil storage groove, 2-copper sleeve, 3-annular sealing groove, 4-annular waterproof groove, 5-annular dustproof groove, 6-annular anti-loose groove.

[0025] It should be noted that the drawings and the written description are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0027] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the device or element indicated or implied to have a specific orientation, to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0028] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] As shown in Figure 1 A guide sleeve is fixed at the end position of the cylinder barrel, and plays a supporting, guiding and sealing role on the hydraulic cylinder piston rod. The guide sleeve is internally provided with an oil storage groove 1, has a low friction coefficient and a small starting pressure of the oil cylinder, can lubricate the seal and the piston rod, and reduces the probability of oil cylinder shaking. A copper sleeve 2 is integrally welded inside the guide sleeve, plays a supporting and guiding role, does not need to be additionally processed with a supporting groove, resists eccentric load and prevents pull rods, and is compact in space. An annular sealing groove 3 is processed inside the guide sleeve, is used for installing a sealing element, and plays a sealing role on a small cavity of the piston rod. An annular waterproof groove 4 is processed inside the guide sleeve, is used for installing a waterproof sealing element, avoids rusting of the annular sealing groove, and widens the use range of the hydraulic cylinder.

[0030] Further scheme, continuing to refer to Figure 1 As shown in the figure, an annular dust groove 5 is processed inside the guide sleeve, and is used for installing a waterproof dust ring.

[0031] Further scheme, continuing to refer to Figure 1 As shown in the figure, the annular dust groove 5 is adjacent to the outer side end face of the guide sleeve, and serves as a first waterproof and dustproof protection barrier.

[0032] Further scheme, continue to refer to Figure 1 As shown, the guide sleeve is externally machined with an annular anti-loosening groove 6 for installing an anti-loosening top screw to avoid loosening of the guide sleeve thread.

[0033] Further scheme, continue to refer to Figure 1 As shown, the annular anti-loosening groove 6 is arranged at the externally threaded radial circumference of the guide sleeve.

[0034] Further scheme, continue to refer to Figure 1 As shown, the oil storage groove 1 is internally extended to the middle of the guide sleeve in a spiral structure from the inner side end surface of the guide sleeve.

[0035] Further scheme, continue to refer to Figure 1 As shown, the oil storage groove 1 is arranged in the copper sleeve 2, and the oil storage groove 1 is not communicated with the inner circumferential surface of the guide sleeve.

[0036] Further scheme, continue to refer to Figure 1 As shown, the annular sealing groove 3 is two, wherein the annular sealing groove I is adjacent to the oil storage groove 1, and the annular sealing groove II is located between the annular sealing groove I and the annular waterproof groove 4; wherein the sealing element in the annular sealing groove I mainly functions to buffer the high-pressure oil in the guide sleeve.

[0037] Further scheme, continue to refer to Figure 1 As shown, the annular sealing groove 3 and the annular waterproof groove 4 both extend into the guide sleeve after passing through the copper sleeve 2.

[0038] In summary, the guide sleeve is one of the important components of the hydraulic cylinder, which plays a supporting and guiding role for the hydraulic cylinder. The utility model provides a novel guide sleeve. Mainly contains oil storage groove, copper sleeve, annular sealing groove etc., mainly used for the occasion of low friction coefficient requirement, small starting pressure, having certain lateral force, the prior art increases the support span by increasing the length of the guide sleeve, thereby enhancing the lateral force of the oil cylinder and the stability of the oil cylinder in operation, the number of support rings inside the guide sleeve also increases accordingly with the increase of the guide length, the overall friction coefficient and the starting pressure of the oil cylinder will increase, and dry friction is easy to cause the oil cylinder to shake and make noise, if the soft support is changed, the friction coefficient can be reduced, and the problem of oil cylinder shaking can also be solved, the anti-unbalanced load capacity will be greatly reduced, and the piston rod is easy to be damaged. The utility model can lubricate the piston rod and the seal, prevent dry friction, reduce the initial starting pressure, reduce the probability of oil cylinder shaking, the copper inside the guide sleeve can prevent the piston rod from being damaged due to large lateral force, avoid seal damage to cause oil leakage, the waterproof groove arranged in the guide sleeve can avoid the rust of the sealing groove, expand the application range of the hydraulic cylinder, the guide sleeve is provided with an anti-loosening groove, the top screw is reliable in anti-loosening, and space is saved.

[0039] The hydraulic cylinder provided by the utility model is described below, and the hydraulic cylinder described below can be correspondingly referred to the guide sleeve described above.

[0040] The hydraulic cylinder provided by the utility model can comprise the guide sleeve described in any one of the above embodiments.

[0041] The beneficial effects achieved by the hydraulic cylinder provided by the utility model are consistent with the beneficial effects achieved by the guide sleeve provided by the utility model, and thus will not be described here.

[0042] It should be noted that the above engineering machinery can be a belt type crane, a crawler type excavator, a crawler type pump truck or other crawler type engineering machinery.

[0043] In the specification provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail in order not to obscure the understanding of the specification.

[0044] In addition, those skilled in the art can understand that although some embodiments described herein include certain features contained in other embodiments but not other features, combinations of features of different embodiments also mean to be within the protection scope of the utility model and form different embodiments. For example, in the above embodiments, those skilled in the art can use in a combined manner according to the known technical solutions and the technical problems to be solved by the present application.

[0045] The above is only the preferred embodiment of the utility model, and does not limit the utility model in any form, although the utility model has been disclosed as above with the preferred embodiment, however, it is not used to limit the utility model, any skilled person in the art can make some changes or modifications for equivalent embodiments with the above prompted technical content without departing from the technical solution range of the utility model, as long as it does not depart from the technical solution of the utility model, according to the technical essence of the utility model, any simple modification, equivalent change and modification of the above embodiments, still belongs to the range of the utility model scheme.

Claims

1. A guide sleeve fixed at the end of a cylinder barrel, which supports, guides and seals the hydraulic cylinder rod, characterized in that: the guide sleeve is internally provided with an oil storage groove for lubricating the seal and the rod; the guide sleeve is internally integrally welded with copper to form a copper sleeve, which supports and guides; the guide sleeve is internally processed with an annular sealing groove for installing a sealing element to seal the small cavity of the rod; the guide sleeve is internally processed with an annular waterproof groove for installing a waterproof sealing element to prevent the annular sealing groove from rusting; the annular sealing groove has two, wherein the annular sealing groove I is adjacent to the oil storage groove, and the annular sealing groove II is located between the annular sealing groove I and the annular waterproof groove; the annular sealing groove and the annular waterproof groove both extend into the guide sleeve after passing through the copper sleeve.

2. The guide sleeve according to claim 1, characterized in that: the guide sleeve is internally processed with an annular dustproof groove for installing a waterproof dustproof ring.

3. The guide sleeve according to claim 2, characterized in that: the annular dustproof groove is adjacent to the outer end surface of the guide sleeve, serving as the first waterproof and dustproof protective barrier.

4. The guide sleeve according to claim 1, characterized in that: the guide sleeve is externally processed with an annular anti-loosening groove for installing an anti-loosening top screw to prevent the guide sleeve from loosening.

5. The guide sleeve according to claim 4, characterized in that: the annular anti-loosening groove is arranged at the external radial circumference thread of the guide sleeve.

6. The guide sleeve according to claim 1, characterized in that: the oil storage groove is in a spiral structure extending inwardly from the inner end surface of the guide sleeve to the middle part of the guide sleeve.

7. The guide sleeve according to claim 6, characterized in that: the oil storage groove is arranged in the copper sleeve, and the oil storage groove is not communicated with the inner annular circumference of the guide sleeve.

8. A hydraulic cylinder, characterized in that: it comprises the guide sleeve according to any one of claims 1 to 7.

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