UA141162U - HYDROCYLINDER - Google Patents

Abstract

The hydraulic cylinder comprises a cylinder inside which is located at least one piston assembly, forming a cavity between it and the cylinder, which closes installed in the cylinder of the groundbox, fixed from falling out of the retaining ring, which is installed in a groove made on the inner landing surface and connected to the cylinder. with the outer side surface of the annular protrusion of the ground box. A fixing element is introduced into the structure, with the possibility of its connection with the inner side surface of the annular protrusion of the ground box, which is installed in the open outside the cylinder, at least one through hole, an additional groove made on the inner landing surface of the cylinder.

Description

The utility model belongs to mechanical engineering, namely hydraulic jacks and hydraulic single-stage, two-stage telescopic racks.

From the state of the art, a hydraulic rack for sections of the shield mechanized fastening with an outer cylindrical tubular shell, with a piston rod assembly that is retractable under the loading pressure of the working fluid, with at least one annular cavity between the outer cylindrical tubular shell and the piston rod assembly and, fixed on the end of the cylindrical tubular shell and closing the annular cavity, with a cuff holder that is screwed into the internal thread in the outer cylindrical tubular shell (11.

The disadvantages of this hydraulic rack include the fact that the threaded design of the cuff holder attachment increases the complexity of the manufacturing of the connected threaded parts, and also requires a special tool for cutting the thread. In addition, the installation/disassembly of the cuff holder requires special keys, and it is difficult to disassemble the threaded connection of the hydraulic strut after use in the mine.

From the state of the art, there is a known hydraulic support for double extension of mechanized fastening sections, which includes a cylinder, inside which at least one piston assembly is located, forming a cavity between it and the cylinder, which is closed by a ground box installed in the cylinder with a seal on the outer diameter and a cuff on the inner, fixed against falling out with a locking device ring, which is installed in the groove made on the inner landing surface of the cylinder, and is connected to the outer side surface of the annular protrusion of the ground box.

The disadvantages of this design include the following. In the cylinders of the hydraulic racks, the mounting holes for the ground boxes in terms of landing depth are equal to the length of the ground box plus the lowering stroke of the ground box until the locking ring is released. This is a necessary condition for the ability to assemble/disassemble the hydraulic rack. But the fixing of the ground box in the direction of the axis (X) is carried out only from its falling out under the action of the pressure of the working fluid, while from its displacement in the opposite direction along the axis (X) by the amount of the lowering stroke, there is no fixation.

Under the action of rarefaction, which is formed in the cavity between the cylinder and the piston group, the ground box is pulled inside the cylinder. Taking into account the fact that the hydraulic rack constantly works both on pressure and on rarefaction, the ground box is constantly in motion, which contributes to the contamination of the places of connection of the ground box with the landing hole of the cylinder with fine coal and rock dust, and negatively affects the service life and tightness of the connection. As a result, leakage occurs, and the hydraulic rack must be removed and sent for repair (21.

Fixation of the ground box in both directions relative to the axis (X) is provided by a useful model, given in this description above (1), but the presence of threaded connections of the parts significantly increases the cost of the hydro-stand and requires a change in the design of the parts.

The basis of a useful model is the task of fixing the ground box from movement along the axis (X) in the direction opposite to the action of the pressure of the working fluid with a minimal change in the design of the hydraulic cylinder.

As a result of the task, a technical result can be obtained, which consists in ensuring the simplicity of fixing the ground box and manufacturability, both for manufacturing and for mounting / dismantling of the fixing element. Consumer properties: improving the maintainability of the hydraulic cylinder, the possibility of using remfond with minimal modification of the design.

In the already known hydraulic cylinder, which contains a cylinder (1), inside which at least one piston unit (2) is located, forming a cavity (3) between it and the cylinder, which is closed by a ground box (4) installed in the cylinder (1), fixed against falling out by a locking device ring (7), which is installed in the groove (8) made on the inner landing surface (9) of the cylinder (1), and is connected to the outer side surface (11) of the annular protrusion (10) of the ground box (4), according to the useful model, that is declared, it is proposed: to introduce a fixing element (12) into the structure, with the possibility of connecting it to the inner side surface (14) of the ring protrusion (10) of the ground box (4), which is installed in the cylinder (1) opened to the outside, with at least one through hole ( 15), an additional groove (13) made on the inner landing surface (9) of the cylinder (1). In addition, it is suggested: to open the additional groove (13) to the outside of the cylinder (1) with another through outlet (16) with the possibility of exit through it for the fixing element (12); the fixing element (12) should be made in the form of a round rod, and the additional groove (13) should be made ring-shaped.

Brief description of the drawings

The essence of the useful model is presented in the drawings, where: because Fig. 1 shows part of the hydraulic cylinder in longitudinal section;

Fig. 2 shows a cross section B-B Fig. 1 along the axis of the additional groove;

Fig. C shows an enlarged view of "A" in fig. 1 ground box in a cylinder;

Fig. 4 shows an enlarged view of "C" Fig. With ground book fixation. 1 - cylinder; 2 - piston assembly;

C - cavity; 4 - ground box; 5 - sealing; 6 - cuff; 7 - retaining ring; 8 - groove; 9 - internal landing surface; 10-ring protrusion; 11 - outer side surface; 12 - fixing element; 13-additional groove; 14-inner side surface; 15 - through hole; 16 - through outlet.

The implementation of a useful model is shown in examples (Fig. 1-4), which are not exclusive, but clearly demonstrate the possibility of achieving the stated technical result with the proposed new set of essential features.

The design of the proposed hydraulic cylinder includes a cylinder (1), inside which is a piston unit (2), which forms a cavity (3) between it and the cylinder, which is closed by a ground box (4) installed in the cylinder (1) with a seal (5) along the outer diameter and cuff (6) on the inside. Fixation of the ground box (4) in the direction of the axis (X) from its falling out under the action of the pressure of the working fluid is carried out by a locking ring (7) (Fig. 1).

For the possibility of its installation, a groove (8) is made on the inner landing surface (9) of the cylinder (1). The ground box (4) is lowered into the landing hole of the cylinder (1) by the amount of stroke

From lowering (G) to releasing the groove (8) and installing the retaining ring (7) (not shown in Fig.).

Then, under the action of the pressure of the working fluid, the piston assembly (2) is fully advanced to the stop of the outer side surface (11) of the ring protrusion (10) of the ground bushing (4) into the locking ring (7) (Fig. 1, 3).

To fix the ground box (4) from its displacement along the axis (X) by the amount of the lowering stroke (U) (Fig. 3) in the direction opposite to the action of the pressure of the working fluid, a fixing element (12) is introduced into the structure (Fig. 2, 3). Alternatively, the fixing element (12) is proposed to be made in the form of a rod with a circular cross-section, although the cross-section can be, for example, square, shaped, etc., and the fixing element (12) can be in the form of, for example, a key, a crutch, a bolt, etc. (in Fig. .not shown).

To fix the ground box (4) from its displacement along the axis (X) by the amount of the lowering stroke ()) on the inner landing surface (9) of the cylinder (1), an additional groove (13) is made at such a distance from the end of the cylinder (1) that the fixing element (12) after its installation was connected to the inner side surface (14) of the ring protrusion (10) of the ground box (4) (Fig. 4).

In the example, the additional groove (13) is made annular, obtained by turning, as the most inexpensive type of metalworking. But to achieve the stated technical result, the groove can be made not on the entire circumference, but only on a part sufficient for connection with the fixing element (12). The length of the arc (a) of the connection (Fig. 2) of the fixing element (12) with the additional groove (13) is determined, first of all, by the convenience of mounting / dismantling of the fixing element (12), which in turn depends on the diameter of the hydraulic cylinder.

For the possibility of installing the fixing element (12) from the outside of the cylinder (1), the additional groove (13) is opened with at least one through hole (15), which is sufficient to achieve the declared technical result. But in the example, the additional groove (13) is opened by another through outlet (16). This option is more convenient for dismantling the fixing element (12) (Fig. 2).

The fixing element (12) is installed when the piston unit (2) is fully extended, when the outer side surface (11) of the ring protrusion (10) of the ground box (4) rests against the retaining ring (7). Then, the fixing element (12) is inserted into the through hole (15) until it contacts the additional groove (13) and the inner side surface (14) of the ring protrusion (10) of the ground box (4). Further, under the action of pressure or shock load, it is brought into an additional groove (13), in the example given, for the length of the arc (a). Remove the locking element (12) by pulling it, clamping the protruding end. For the option with two through holes (15) and (16), it is also convenient to use the impact method "through".

The useful model that is claimed allows to achieve a technical result: ensuring the simplicity of fixing the ground box and the manufacturability of both manufacturing and installation/dismantling of the fixing element. Achieving the stated technical result gives the useful model consumer properties: improvement of the hydraulic cylinder's maintainability, the possibility of using spare parts with minimal design refinement.

For a person skilled in the art, some modifications of the hydraulic cylinder can be derived from the previous description, which fall within the scope of protection of the appended clauses of the formula of the utility model.

Sources of the informant: 1. Patent KO Mo 2403390, priority from 10.28.2005, publ. 10.11.2010. Bull. Mo. 31 2. pNrz//peIrikb5.ogo/7-84154.piti "Hydrocylinders of mechanized supports of coal mines".

Claims (3)

USEFUL MODEL FORMULA 1. A hydraulic cylinder containing a cylinder inside which at least one piston unit is located, forming a cavity between it and the cylinder, which is closed by a ground box installed in the cylinder, fixed against falling out by a retaining ring, which is installed in a groove made on the inner landing surface of the cylinder, and is connected to the outer side surface of the ring protrusion of the ground box, which is characterized by the fact that a fixing element is introduced into the design, with the possibility of its connection with the inner side surface of the ring protrusion of the ground box, which is installed in the cylinder opened to the outside with at least one through hole, an additional groove made on the inner cylinder landing surface. 2. The hydraulic cylinder according to claim 1, which is characterized by the fact that the additional groove is opened to the outside of the cylinder by another through outlet opening with the possibility of a locking element exiting through it. 3. The hydraulic cylinder according to claim 1, which is characterized by the fact that the fixing element is made in the form of a rod of round cross-section, and the additional groove is made of a ring. / 22 And He tore, And 8-5 Ed as /? NIKA KU - MOU And 7 U iya 1 bek Va SUMU Ж и ку и ши я с че Кеды че fig, a