CN219605712U - Dig quick-witted middle arm hydro-cylinder assembly - Google Patents

Abstract

The utility model discloses a middle arm oil cylinder assembly of a digging machine, which comprises a hydraulic oil cylinder, wherein a piston rod is slid in the hydraulic oil cylinder, a reinforcing protecting sleeve which slides on the outer wall of the hydraulic oil cylinder is fixed on the piston rod, a yielding groove is formed in the reinforcing protecting sleeve, which is positioned on the outer wall of the hydraulic oil cylinder, at the position of hydraulic oil inlet and outlet, of the hydraulic oil cylinder, a sliding block is connected in the yielding groove in a sliding manner, the sliding block is fixed at the top end of the hydraulic oil cylinder through a first positioning screw, and the side edge of the sliding block is connected with the top end of the yielding groove through a telescopic baffle plate. The reinforced protection sleeve and the telescopic baffle plate play a role in integrally protecting the piston rod, so that the piston rod is prevented from being damaged by collision of foreign objects, meanwhile, the reinforced protection sleeve is arranged, the piston rod is changed from a pure piston rod to be stressed simultaneously with the reinforced protection sleeve, the piston rod is prevented from being broken due to overlarge stress, and the service life is prolonged.

Description

Dig quick-witted middle arm hydro-cylinder assembly

Technical Field

The utility model relates to the technical field of oil cylinder assemblies, in particular to a middle arm oil cylinder assembly of an excavator.

Background

An excavator is also called an excavating machine, and is an earth moving machine which excavates materials higher or lower than a carrying plane by a bucket and loads the materials into a transport vehicle or unloads the materials to a storage yard. The materials excavated by the excavator are mainly soil, coal, silt and soil and rock after pre-loosening. The arm in the excavator is driven mainly by virtue of an oil cylinder assembly, and the linear reciprocating motion function is realized through the extension and retraction of a piston rod.

The piston rod has a section to stretch out the cylinder body outside generally, and when the hydro-cylinder stroke used up, the piston rod can all stretch out outside the cylinder body, and dig quick-witted normal operating environment abominable, the piston rod can be broken because of the stone etc. knocks with a ball, and the piston rod needs to bear the whole power of dig the arm motion in the quick-witted simultaneously, and the piston rod atress is great easily broken, influences life. Therefore, it is necessary to design an arm cylinder assembly in an excavator.

Disclosure of Invention

Aiming at the situation, in order to overcome the defects of the prior art, the utility model provides the middle arm oil cylinder assembly of the excavator, the reinforcing protective sleeve and the telescopic baffle piece play a role in integrally protecting the piston rod, so that the piston rod is prevented from being damaged by collision of foreign objects, meanwhile, the setting of the reinforcing protective sleeve is changed from a simple piston rod into the piston rod and the reinforcing protective sleeve is stressed simultaneously, the piston rod is prevented from being broken due to overlarge stress, and the service life is prolonged.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides an arm hydro-cylinder assembly in dig machine, includes hydraulic cylinder, the inside slip of hydraulic cylinder has the piston rod, be fixed with the reinforcement lag of slip at the hydraulic cylinder outer wall on the piston rod, the groove of stepping down has been seted up to the business turn over hydraulic oil department that is located the hydraulic cylinder outer wall on the reinforcement lag, the inside sliding connection in groove of stepping down has the slider, the slider is fixed on the top of hydraulic cylinder through first positioning screw, the side of slider is connected with the top of groove of stepping down through flexible separation blade.

Preferably, the top of piston rod has cup jointed the positioning seat, the bolt hole has just been seted up to corresponding on positioning seat and the reinforcement lag, the inside of bolt hole has connect the second set screw soon.

Preferably, the inner wall of the tail end of the reinforcing protective sleeve is provided with a groove, the inside of the groove is clamped with a clamping ring, one end of the clamping ring is rotated to be provided with a plurality of balls which are contacted with the outer wall of the hydraulic cylinder, and the other end of the clamping ring is clamped with a sealing ring.

Preferably, the inner wall of the abdication groove is symmetrically provided with a limit groove, and the side edges of the telescopic baffle plate and the sliding block slide in the limit groove.

Preferably, the tail end of the hydraulic oil cylinder is fixed with a first connecting ring, and the top end of the piston rod is fixed with a second connecting ring.

The beneficial effects of the utility model are as follows:

the reinforcing protective sleeve and the telescopic baffle piece play a whole protective role on the piston rod, so that the piston rod is prevented from being damaged by collision of foreign objects, the setting of the reinforcing protective sleeve is realized, the piston rod is changed into the piston rod by a pure piston rod, the reinforcing protective sleeve is stressed simultaneously, the piston rod is prevented from being broken due to overlarge stress, and the service life is prolonged.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a schematic view of the overall front plan structure of the present utility model;

FIG. 2 is a schematic plan view of the present utility model in an overall cross-sectional configuration;

FIG. 3 is an enlarged plan view of the area A of FIG. 2 in accordance with the present utility model;

FIG. 4 is a schematic diagram of a front plan view of a reinforcement shield according to the present utility model;

reference numerals in the drawings: 1. a hydraulic cylinder; 2. a first connection ring; 3. a second connecting ring; 4. reinforcing a protective sleeve; 5. a relief groove; 6. a telescopic baffle; 7. a slide block; 8. a first positioning screw; 9. a piston rod; 10. a positioning seat; 11. bolt holes; 12. a second set screw; 13. a groove; 14. a clasp; 15. a ball; 16. a seal ring; 17. and a limit groove.

Detailed Description

Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

Example 1

The utility model provides the following technical scheme as shown in fig. 1, 2 and 4: the utility model provides an arm hydro-cylinder assembly in excavator, including hydraulic cylinder 1, the inside slip of hydraulic cylinder 1 has piston rod 9, be fixed with the reinforcement lag 4 of sliding at hydraulic cylinder 1 outer wall on piston rod 9, the inside slip connection who is located hydraulic cylinder 1 outer wall business turn over hydraulic oil department has seted up the groove 5 of stepping down on reinforcement lag 4, the inside sliding connection who steps down groove 5 has slider 7, slider 7 passes through first positioning screw 8 to be fixed on the top of hydraulic cylinder 1, the side of slider 7 passes through flexible separation blade 6 and is connected with the top of groove 5 of stepping down, piston rod 9 can drive the in-process of the internal motion of hydraulic cylinder 1 and consolidate lag 4 and slide on the outer wall of hydraulic cylinder 1, because slider 7 is fixed on the top of hydraulic cylinder 1 through first positioning screw 8, in the in-process of consolidating lag 4, slider 7 slides in the inside of stepping down groove 5, and drive flexible separation blade 6 is tensile, the setting of keeping down groove 4 and flexible separation blade 6 plays whole guard 9 to the piston rod 9, avoid piston rod 9 to be damaged by the foreign object collision, set up of reinforcement lag 4 simultaneously, by simple piston rod 9 becomes 9 and consolidate lag 4, the piston rod 9 is avoided the atress to break by the 5, the life of bearing force is greatly to be broken simultaneously.

Preferably, the inner wall symmetry of the abdicating groove 5 is provided with a limiting groove 17, the side edges of the telescopic baffle 6 and the sliding block 7 slide in the limiting groove 17, the limiting groove 17 is arranged, and the tightness of the connection of the telescopic baffle 6 and the sliding block 7 with the abdicating groove 5 is improved.

Preferably, the tail end of the hydraulic cylinder 1 is fixed with a first connecting ring 2, the top end of a piston rod 9 is fixed with a second connecting ring 3, and the first connecting ring 2 and the second connecting ring 3 are arranged, so that the hydraulic cylinder 1 and the piston rod 9 are conveniently connected with the middle arm of the excavator.

Example two

Referring to fig. 1 and 2, as another preferred embodiment, the difference from the first embodiment is that the top of the piston rod 9 is sleeved with a positioning seat 10, the positioning seat 10 and the reinforcing protecting sleeve 4 are provided with bolt holes 11 in opposite correspondence, the inside of the bolt holes 11 is screwed with a second positioning screw 12, and the reinforcing protecting sleeve 4 is fixed on the positioning seat 10 through the second positioning screw 12 penetrating through the bolt holes 11, so that the fixing stability is good, and the mounting and the dismounting are convenient.

Example III

Referring to fig. 2 and 3, as another preferred embodiment, the difference between the first preferred embodiment and the second preferred embodiment is that the inner wall of the tail end of the reinforcing protection sleeve 4 is provided with a groove 13, a snap ring 14 is clamped in the groove 13, one end of the snap ring 14 rotates to form a plurality of balls 15 contacting with the outer wall of the hydraulic cylinder 1, the other end of the snap ring 14 is clamped with a sealing ring 16, the balls 15 roll on the outer wall of the hydraulic cylinder 1 to reduce friction, and meanwhile, the sealing performance between the reinforcing protection sleeve 4 and the outer wall of the hydraulic cylinder 1 is improved due to the arrangement of the sealing ring 16.

Working principle:

the piston rod 9 can drive the reinforcing protective sleeve 4 to slide on the outer wall of the hydraulic cylinder 1 in the process of the internal movement of the hydraulic cylinder 1, because the sliding block 7 is fixed at the top end of the hydraulic cylinder 1 through the first positioning screw 8, the sliding block 7 slides in the inside of the yielding groove 5 in the advancing process of the reinforcing protective sleeve 4 and drives the telescopic baffle 6 to stretch, the reinforcing protective sleeve 4 and the telescopic baffle 6 play a whole protective role on the piston rod 9, the piston rod 9 is prevented from being damaged by foreign object collision, meanwhile, the setting of the reinforcing protective sleeve 4 is changed from the simple piston rod 9 into the piston rod 9 and the reinforcing protective sleeve 4 to bear force simultaneously, the piston rod 9 is prevented from being broken due to overlarge stress, and the service life is prolonged.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (5)

1. The utility model provides an arm hydro-cylinder assembly in dig machine, includes hydraulic cylinder (1), the inside slip of hydraulic cylinder (1) has piston rod (9), its characterized in that: the hydraulic oil cylinder is characterized in that a reinforcing protective sleeve (4) sliding on the outer wall of the hydraulic oil cylinder (1) is fixed on the piston rod (9), a yielding groove (5) is formed in the reinforcing protective sleeve (4) and located at the position, entering and exiting from hydraulic oil, of the outer wall of the hydraulic oil cylinder (1), a sliding block (7) is connected to the inner portion of the yielding groove (5) in a sliding mode, the sliding block (7) is fixed to the top end of the hydraulic oil cylinder (1) through a first positioning screw (8), and the side edge of the sliding block (7) is connected with the top end of the yielding groove (5) through a telescopic baffle (6).

2. The boom cylinder assembly of a shovel according to claim 1, wherein: the top of piston rod (9) has cup jointed positioning seat (10), just correspond on positioning seat (10) and the reinforcement lag (4) and seted up bolt hole (11), the inside of bolt hole (11) has connect second set screw (12) soon.

3. The boom cylinder assembly of a shovel according to claim 1, wherein: the inner wall of the tail end of the reinforcing protective sleeve (4) is provided with a groove (13), a clamping ring (14) is clamped in the groove (13), one end of the clamping ring (14) rotates to form a plurality of balls (15) which are in contact with the outer wall of the hydraulic cylinder (1), and the other end of the clamping ring (14) is clamped with a sealing ring (16).

4. The boom cylinder assembly of a shovel according to claim 1, wherein: limiting grooves (17) are symmetrically formed in the inner wall of the abdication groove (5), and the side edges of the telescopic baffle piece (6) and the sliding block (7) slide in the limiting grooves (17).

5. The boom cylinder assembly of a shovel according to claim 1, wherein: the tail end of the hydraulic oil cylinder (1) is fixed with a first connecting ring (2), and the top end of the piston rod (9) is fixed with a second connecting ring (3).