RU8366U1 - SHOCK ABSORBER FOR WASHING MACHINES, PREVIOUSLY HOUSEHOLD CARS FOR WASHING CLOTHES - Google Patents

Abstract

1. A shock absorber for washing machines, mainly household machines for washing clothes, adapted for installation between the tank-drum washing unit and the lower base of the body of these machines to dampen mechanical stresses arising during rotation of the drum at different speeds of washing and centrifugation, composed of at least from a tubular body and a rod that enters the body and performs reciprocating sliding in the tubular body, equipped with friction means working together with the tubular body in a frictional manner to obtain a braking effect that provides damping of mechanical stresses, characterized in that the tubular body (9) and the friction means (37) of the rod (14) are made removable and have polygonal shapes in the areas of their mutual frictional contact, the dimensions and shape of which are the same for them, so that the corresponding sides of the tubular body (9) and the friction means (37) coincide with each other other in any operating state, both at rest and in the operating state of the shock absorber, and the friction means (37) are associated with spring means (44, 45), ensuring that they are always kept in a state of frictional contact with the tubular body (9).2. The shock absorber according to claim 1, characterized in that the tubular body (9) consists of at least first and second separate metal shells (18, 19) identical and symmetrical to each other, equipped with straight flattened edges (21, 21) capable of mutually matching to each other and be connected by known methods, thus forming an internal cavity (15

Description

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SHOCK ABSORBER FOR WASHING MACHINES, PREFERREDLY, HOUSEHOLD WASHING MACHINES

The present invention relates to a shock absorber for washing machines, mainly clothes washing machines, for attaching tank-drum assemblies in such machines and for efficiently damping mechanical stresses arising from the operation of said machines.

There are various types of shock absorbers for washing machines and, in particular, household machines for washing clothes, designed for fastening and damping mechanical stresses in the associated washing units (tank and drum) of such machines during their operation and installed between the lower part of each washing unit and the bottom base of these machines.

Such shock absorbers are usually formed by a hollow cylinder and a cylindrical rod capable of reciprocating movement inside this cylinder, said rod having brake surfaces made of suitable material interacting with the inner surface of the cylinder, and this rod moves linearly and reciprocally during operation of the corresponding machine. inside this cylinder due to the movement of the washing unit caused by the rotation of the drum with different speeds with Irki and centrifugation, carrying out, thus, the braking action, capable of absorbing the stresses generated.

However, these types of shock absorbers, which are usually made of metal materials and sometimes also have components made of plastic, have some drawbacks, especially when they need to be installed on washing machines for washing clothes in which the drum rotates at very high speeds in centrifugation mode (above 1000 rpm) and at these

conditions, the washing unit creates high mechanical stresses in the design of such a machine. In fact, in such cases, it was found that in each of the shock absorbers, the rod sliding inside the cylinder reciprocatingly and rectilinearly moves radially throughout the course of its stroke, so that the braking surfaces of such a rod no longer produce a braking effect distributed almost uniformly over the entire inner surface of the cylinder, and its inhibitory effect on the inner surface of the cylinder is rather heterogeneous and variable, which leads to a concentration of forces in certain areas of the inside the surface of the cylinder, thus causing both premature and undesirable wear and, therefore, shortening the life of each of the shock absorbers and not providing a satisfactory braking effect in relation to the mechanical stresses generated by the washing unit.

The main purpose of this utility model was to eliminate the drawbacks associated with the use of existing shock absorbers using a new type of shock absorber capable of providing effective braking action distributed almost uniformly throughout the shock absorber during any operation of clothes washing machines, which consists of simple parts that are quickly assembled together, and is able to work for a long time in a satisfactory and reliable manner.

In addition, the present utility model also provides a shock absorber of a robust construction, which makes it convenient to operate.

The structural characteristics of the shock absorber according to the present utility model are described in detail with specific references to the paragraphs of the attached patent claims.

The present utility model will be best understood with the help of the following description, given solely for the purpose of illustrative example with reference to the accompanying drawings, in which:

- Figure 1 schematically shows a washing machine equipped with a shock absorber according to the present invention;

-Fig. 2, 3 and 4 show, respectively, a front view, a side view and a three-dimensional exploded view of a shock absorber according to the present invention in a first embodiment of its technical solution,

-Fig. 5 schematically shows a side view of the two main parts of this shock absorber, inserted one into the other,

-Fig. 6 and 7 schematically show a front and side view of two main parts of FIG. 5, extracted one from the other,

-Fig. 8, 9 and 10 show top views of the cuts along lines AA, BB and CC, respectively, of the shock absorber shown in FIG. 5,

-Fig 11 a, b, c show the distribution pattern of the braking action in a known shock absorber,

-Fig 12 a, b, c shows the distribution pattern of the braking action in the proposed shock absorber,

-Fig. 13 shows a front view of another detail of a shock absorber according to the present invention,

-Fig 14 and 15 show a detail from Fig 13 in section along the lines D-D and EE, respectively,

-Fig 16 shows a front view of another detail of the shock absorber according to the present invention,

-Fig. 17 shows a detail from FIG. 16 in section along the line F-F,

-Fig 18 shows a front view of a shock absorber according to the present invention in a second embodiment of its technical solution,

-Fig. 19 shows a side view of the shock absorber of FIG. 18 in section along the line HH,

-Fig. 20 shows a half side view of the shock absorber of FIG. 18 in section along line 1-1,

-Fig. 22 shows a half side view of the shock absorber of FIG. 21 in a section along the line L-L,

-Fig. 23 shows a side view of a portion of the shock absorber of FIG. 21 in a section along the line MM,

-Fig. 24 and 25 show a three-dimensional image of the shock absorber of FIG. 21, set in its two different working positions,

-Fig. 26 shows a three-dimensional exploded view of the shock absorber shown in FIG. 21.

In FIG. 1 schematically shows a washing machine, in particular a household clothes washing machine, indicated in the text by number 1, consisting mainly of a metal box-shaped body 2, in which a washing unit 3, formed by a washing tub 4 and a rotating drum 5 for loading clothes, is placed in the specified tank, reinforced with upper suspension springs 6 and lower shock absorbers 7 installed between the lower part of the tank 4 and the lower base 8 of the machine body, providing damping of mechanical stresses caused by swinging m detergent node during operation of the drum in the washing and centrifugation conditions.

In FIG. 2-7, one of the shock absorbers 7 according to the present invention is schematically shown in the first embodiment of its technical solution, which is mainly formed by two main parts, namely: a metal tubular body 9 having an elongated shape and hollow inside, respectively having a section with an open end 10 and a lower closed portion 11 that is connected to an end zone 12 having a through hole 13 into which a rubber sleeve is inserted and then a finger (both of which are not shown) to form a hinge o and its vibration-damping connection with the base of the machine 8, and an elongated rectilinear rod 14 made of plastic material, the dimensions of which are such that it can be inserted and adapted to

the inner cavity 15 of the tubular body 9 so that it can slide in it reciprocating and rectilinear, and its outer end zone 16 has a through hole 17 opposite to the hole 13 of the tubular body 9, into which the rubber sleeve and then the finger are inserted ( both are not shown) to create an articulated vibration-damping connection with the bottom of the tank of the machine.

As is quite apparent from FIG. 2, 3, 4 and FIGS. 8-10, the metal tubular body 9 is composed of two half-shells 18 and 19 identical and symmetrical to each other, each of which is decorated as described below and manufactured in the process of drawing with a shift of the corresponding metal sheet blanks and, accordingly, equipped with two rectilinear flattened edges 20 and 21, located opposite each other, which can be aligned with each other and overlap one another, and then finally connected together by welding or other known means. In the particular case, each half-shell is decorated in the form of an elongated rectilinear casing 22, having the form of a polygon with sides of the same or different size, extending from the section with open end 10 almost to the lowest section with closed end 11 connected to the end zone 12 to which such the rectilinear casing 22 is attached with the help of conical steps 23 and 24. In the presented embodiment of the technical solution, the external outlines of each half-shell are rhombic and they have a central flat face 25 and two flat and inclined faces 26 and 27 having almost the same dimensions as the central face, tilted symmetrically and oppositely to one another and directed from the corresponding edge of such a central fan 25 to the longitudinal axis of symmetry AA passing centrally relative to the tubular body 9 . It is obvious that the shape and faces of the rectilinear housing 22 and each of the half-shells 18 and 19 may differ from the presented version of the technical solution, provided that always

there will be flat faces capable of performing the functions of damping the vibrations of the washing unit of washing machines in compliance with the criterion described below. In turn, the elongated rectilinear rod 14 is preferably made integral of molded plastic material and is formed by two ribbed parts 28 and 29, interconnected and designed so that their external outlines are identical and have dimensions slightly smaller than the dimensions of the inner cavity 15 of the tubular body 9 so as to enter into it and be able to slide linearly and reciprocally inside the specified housing, and these parts are provided with corresponding elongated rectilinear ribs 30, 31 and 32, 33 connected perpendicular to each other and extending, respectively, along the larger and smaller sections of the cross section of the tubular body 9, and these ribs are limited at the ends of the plates 34, 35 and 36, having the same external outlines, as indicated the inner cavity 15, and the plate 34 is larger in size than this inner cavity and is connected to the outer end zone 16 of the rod 14, while the plates 35 and 36 are somewhat smaller than this inner cavity so as to be able to slide in it, These plates are arranged respectively at a position intermediate between the ribbed portions 28 and 29, and the end position of the rod 14 opposite the position of the plate 34. Thus, as apparent from FIG. 5, 6 and 7, when the rod 14 is inserted or removed from the inner cavity 15 of the tubular body 9, the plates 35 and 36 exactly coincide with the inner contour of this tubular body, while the plate 34, on the contrary, protruding beyond the open end of the specified tubular body, prevents the complete entry of the specified rod into this tubular body. In addition, the ribbed portion 29, which is shorter than the rest of the 28 elongated rectilinear rod 14, has ribs, the dimensions of which are such that they allow you to place the friction

a liner 37 made of a suitable antifriction material capable of inhibiting due to friction against the surface of the inner cavity 15 of the tubular body 9 during the reciprocating movement of the rod 14 inside such a tubular body caused by vibrations of the tank-drum assembly during operation of the machine, followed by damping of mechanical stresses created by such vibrations. In particular, this friction liner is made of individual parts, each of which has the shape of an elongated plate 38 having flat faces with the same shape and dimensions slightly larger than the dimensions of the internal cavity 15 of the housing 9, which should allow such parts to enter and slide inside the specified the internal cavity. In the present case, the friction liner consists of two parts 39 and 40, each of which has two identical flat faces 41 and 42, inclined symmetrically along their entire length and having the same inclination as the corresponding faces and adjacent faces 26 and 27 of two half shells 18 and 19 of the tubular body 9. These friction liner oblong plates, as can be seen in detail in FIG. 16 and 17, respectively, representing a front view and a section of a part, are provided with a plurality of through holes 43 evenly distributed over the surface of the plate so as to allow grease or other suitable lubricants to pass through them to keep all parts of the shock absorber constantly in a lubricated state during the cycles of their work, and placed on the outside with respect to the rectilinear ribs 32, 33 of the ribbed section 29 of the elongated rod 14, and elastic elements are laid between them, o ormlennye as two metallic flat springs 44 and 45 and, in particular, it is evident from FIG. 4, 8 -10, each of which has such a shape and dimensions that they fit one surface to the corresponding friction elongated extra-long plate, and its opposite

surface - to the outer contour of the rectilinear ribs 32, 33 of the specified ribbed section 29.

In particular, each metal flat spring is shaped so that it has one or more slots for passing grease or other suitable lubricants to keep the various parts of the shock absorber always in a lubricated state, and in this particular case, such a flat spring has a rectangular shape and contains a Central slot 46 at its longitudinal edge 47 and two slots 48 and 49 at its other longitudinal edge 50, and these slots are offset relative to the first and they have a centrally located the throat plates 51 and 52, bent relative to the plane of the corresponding flat spring and turned towards the ribs 32 and 33 of the ribbed section 29, in order to spring away from them and, thus, to press each flat spring to the associated friction elongated liner plate, thereby thereby keeping it always pressed in sliding contact with the surface of the inner cavity 15 of the tubular body 9. In FIG. 11 and 12 show brake force distribution patterns in a conventional shock absorber and in a shock absorber according to the present invention, respectively. Referring in particular to FIG. 11a, it schematically shows a conventional cylindrical shock absorber 53, consisting of a cylindrical rod 54 inserted inside a cylindrical shell-shaped housing 55 and capable of sliding inside it reciprocating and rectilinear. In this case, the shock absorber is shown at rest, when the drum of the washing machine is stationary, and therefore, the rod 54 does not create a braking effect and can practically be considered to be located coaxially relative to the shell-shaped housing 55. In FIG. 11 b, on the contrary, a shock absorber is shown schematically in its working state when the drum of the machine is activated, and here you can see that the rod 54 tends to move in the casing-like housing 55 not only reciprocally, but also radially, coming in contact with the inner surface of this casing-like housing, in this case in the area indicated by serial number 56.

In this operating mode, the rod 54 moves eccentrically with respect to the shell-shaped housing 55 and, therefore, exerts an inhomogeneous inhibitory effect on the inner surface of such a shell-shaped housing, namely, such that it is larger in the contact zone and progressively decreases from this zone towards the rest of this inner surface, as shown by a group of force vectors 57 in FIG. 11 sec Turning now to FIG. 12 a, where a shock absorber 7 according to the present invention is shown schematically, being at rest, and where it can be noted that the rod 14 is coaxially located inside the tubular body 9 and does not exert a braking effect on it. In contrast, in FIG. 12 b, where the shock absorber is presented in its operating state, in which such a rod is always radially offset and therefore slides eccentrically inside the housing 9, it can be noted that in this case the friction liner of the rod spontaneously sets its surfaces on two adjacent faces 41 and 42 opposite the corresponding faces 26 and 27 of the tubular body 9 in its contact zone 56, so that the reciprocating sliding of the specified friction liner in the tubular body no longer renders, as in the previous case, non-uniform It has a braking effect on the inner surface of the specified tubular body; rather, it exerts a steady and evenly distributed braking effect on this inner surface, due to the fact that the faces 41 and 42 of the friction liner are always parallel to the opposing faces 26 and 27 of the tubular body 9 both at rest and and in working condition and, therefore, in this last state, in which the mutual adhesion of these faces is achieved at any contact position, in accordance with the differences in the eccentricity between a braking action is always created by the rod and tubular body

of the same intensity on the same faces as shown schematically in FIG. 12c with a group of force vectors 57 having the same intensity.

Thus, the shock absorber according to the present invention allows to obtain a braking effect distributed almost uniformly during any operating mode of the washing machine, due to the fact that during operation of such a machine the friction liner is stably and uniformly pressed against the tubular body using flat springs 44 and 45, which for this purpose, they are mainly made of string steel and have such a shape that they fully fit the contours of both the plates 38 of the friction liner and the ribs 32, 33 of the ribbed section run 29, thus ensuring, on the one hand, effective and reliable damping of mechanical stresses generated by vibrations of the tank-drum assembly during rotation of the drum, especially at high centrifugation speeds, and on the other hand, reducing the wear of such a shock absorber and increasing its service life .

In addition, each shock absorber of this kind is simple in design and made of just a few parts that can be easily and quickly assembled and disassembled, and its parts are made of metal materials, which allows you to well redistribute the heat generated during reciprocal friction movement. And finally, the presence of ribs on the ribbed sections 28 and 29 of the shock absorber, whose elongation and direction coincide with the direction of the mechanical stresses transmitted by the washing unit to the base of the machine, allows such a shock absorber to effectively counteract any mechanical stresses generated by the washing unit, both at rest, so and in operating modes. Another important advantage obtained by using this shock absorber is the ability to always provide effective and stable lubrication of various parts of the shock absorber due to the fact that it has an elongated rectilinear casing on the inner surface 22

a tubular body 9, consisting of two half-shells 18 and 19, a plurality of grooves 58 and 59, mutually parallel and inclined with respect to each other in opposite directions relative to the longitudinal direction of this elongated casing (Fig. 2 shows a section of the groove 58 along the line GG) . Thus, before assembling each shock absorber in the washing machine, a certain amount of grease or other suitable lubricant is introduced into it, which accumulates and concentrates on its own in the grooves 58 and 59, and then is gradually removed from them by the friction liner during its reciprocating movement in the tubular body 9 and is distributed over all parts of the shock absorber, passing through the through holes 43 of the plates of these friction liners and grooves 46, 47 and 48 of the flat springs 44 and 45. In addition, the resulting shock absorber allows you to effectively ventilate the air contained inside it during the return stroke of the rod 14 in the tubular body 9, due to the presence of many through holes 60 made on two half-shells 18 and 19 of the specified tubular body and provided, in this case, along the entire length of the corresponding central flat face 25 of each of the half-shells. Finally, in accordance with the present invention, it is also possible to change the shape of the friction liner 37 and the tubular body 9, giving them a polygon shape with the same number of sides, but different from that described in the above example, which is given solely as an example, provided that the edges such inserts and the tubular body will always be parallel and correspond to each other in any operating mode of the washing machine, and that they always come in contact, causing a reliable and uniform braking action e at any contact position between said friction lining and the tubular body. Turning to FIG. 18, a shock absorber according to the present invention is shown in a second embodiment of its technical solution.

It can be noted that in this case, the shock absorber is formed in the same way as described above, and, accordingly, the section with the open end of the tubular body 9 and the shaft 14 are also provided with corresponding through holes 13 and 17 into which two suitable rubber bushings 61 are inserted , 62 and 63, 64, concentric with respect to one another (see Fig. 26), serving to pass the corresponding articulated fingers (not shown), and these fingers, respectively, are attached to the base 8 of the machine and to the washing unit 3. How quite obvious from FIG. 19 and 26, the bushings 61, 62 and 63, 64 are made of rubber and metal, respectively, and their sizes are such that they fit one another and can be assembled in the corresponding through hole, and each sleeve consists of two identical halves, indicated by the corresponding numbers 61, 61, 62.62 and 63, 63, 64, 64, which are mutually assembled and disassembled easily and quickly without the use of tools. Furthermore, as once again obviously follows from FIG. 18, the half-shells 18 and 19 are adapted for their mutual assembly along their adjacent longitudinal rectilinear edges, on which a corresponding set of radially protruding teeth 65, 66 and slots 67, 68 are displaced relative to each other so that the teeth and slots of one half-shell are combined with the corresponding slots and teeth of the other half-shell so that the junction areas of these teeth and slots are completely continuous and coincide with one another. The semi-shell connection obtained in this way allows for high dimensional stability and mechanical strength, as well as the efficient and safe assembly of these half-shells, which can hardly be achieved in the case of conventional electric welding or soldering of two half-shells designed as protrusion-cavity joints.

Another advantage of this solution is that for the manufacture of each half-shell, it is sufficient to have one mold instead of two different molds, as in the case of half-shells in the form

protrusion-cavity, and that for the connection it is necessary to use soldering equipment, which is less bulky compared to the machine for electric welding and the associated control device.

Referring again to FIG. 18, we note that on one of the half-shells of the tubular body 9, in this case, half-shell 18, there is at least one notch 69, slightly protruding into the interior of the shock absorber, which interacts with the sliding rod in such a way that it allows the latter to be inserted into the inner cavity with little effort, but prevents accidental removal of this rod from the tubular body during operation of the machine. This design feature of this shock absorber also ensures that it can be disassembled only by applying to it a more significant and predetermined force necessary to overcome the engagement force of the notch 69 with the shaft 14, which prevents accidental and improper scattering of the shock absorber mounted on the machine.

Turning to FIG. 21, in which the shock absorber according to the present invention is shown in the third embodiment of the technical solution, note that this shock absorber is made with the same characteristics as described above, but is also equipped with various extruded protrusions 70 and 71 on at least one of the half shells, in this case, on the half-shell 18, which are pressed by pressing the metallic material of the half-shell and protrude slightly towards the inner cavity of the tubular body 9 in this way and for that purpose, which will be described below. As is apparent from FIG. 23, these protrusions are designed so that they have a slight inclination with respect to the rod 14 and, in particular, the two protrusions 70 have a slight inclination converging from the midline of the half-shell 18 towards the portion with the open end 72 provided with bushings 61, 62, forming due to this, the corresponding inclined surfaces 73, while the other two protrusions 71 are designed so that they have a slight inclination with a convergence in

Opposite to the first direction, namely from the midline of the half-shell 18 to its other end portion where the rod 14 is inserted, thus forming the corresponding inclined surfaces 74, the indicated inclined surfaces 73 and 74 interacting with the friction liner 37 of the rod 14 during its sliding inside the specified tubular body 9, produce a braking effect of variable intensity, increasing as the rod slides relative to surfaces 73 and 74, respectively, in the N or O direction, and decreases, to where a given rod slides in the opposite direction. Such a braking effect of variable intensity is proportional to the intensity of mechanical stresses and serves to improve the damping ability of the shock absorber.

Turning now to FIG. 24 and 25, where this shock absorber is depicted in a state in which a suitably formed shaft 14 is removed and inserted with respect to the tubular body 9, respectively, whereas in FIG. 26, various details of the same shock absorber are visible and, in particular, it is also seen that the plates 38 of the friction liner 37 are attached with elastic elements (not shown) to the outer surface of the unbound end portion 75 of the rod 14, which is inserted into the inner cavity of the tubular body 9, and the landing of these plates on the rod is very easy due to the presence of teeth 76, protruding above its outer surface, and engagement of the respective surfaces of these plates.

Therefore, the shock absorber implemented in this way is composed of various parts and can be easily assembled and disassembled without the use of tools, so that parts made of dissimilar materials can be separated and then disposed of in accordance with special standards related to this issue.

Claims (10)

1. The shock absorber for washing machines, mainly household machines for washing clothes, adapted for installation between the washing unit of the tank drum and the lower base of the body of these machines for damping mechanical stresses that occur during rotation of the drum at different speeds of washing and centrifugation, composed of at least from a tubular body and a rod entering the body and making reciprocal sliding in a tubular body equipped with friction means working in conjunction with the in a frictional manner to obtain an inhibitory effect, providing damping of mechanical stresses, characterized in that the tubular body (9) and friction means (37) of the rod (14) are made removable and have polygonal shapes, sizes and shapes in the areas of their mutual frictional contact which they have the same, so that the corresponding sides of the tubular body (9) and friction means (37) are coincident with each other in any working state, both at rest and in the state of work an ortizer, moreover, friction means (37) are connected with spring means (44, 45), which ensure that they are always kept in frictional contact with the tubular body (9).  2. A shock absorber according to claim 1, characterized in that the tubular body (9) consists of at least the first and second separate metal shells (18, 19) that are identical and symmetrical to one another, provided with rectilinear flattened edges (21, 21) capable of mutually approach each other and be connected by known methods, thus forming an internal cavity (15) for inserting into it and sliding the rod (14) into it, the first and second half-shells (20, 21), each of which consists of oblong rectilinear casing (22), cat outlines It has the shape of a polygon having sides (25 - 27) with the same or different sizes, and this body extends from its open end portion (10), through which the rod (14) is inserted into the internal cavity (15), to its closed end plot (11), which is made with the possibility of attachment to the washing machine.  3. The shock absorber according to claim 2, characterized in that the first and second half-shells (20, 21) are provided with a plurality of internal grooves (58, 59) for collecting a certain amount of grease or other suitable materials, and a plurality of through holes (60) for for ventilation of the air contained inside it.  4. The shock absorber according to claim 3, characterized in that the shaft (14) is preferably made of solid plastic material and consists of the first and second ribbed sections (28, 29), interconnected and shaped with external shapes that are identical and have dimensions are smaller than the dimensions of the inner cavity (15) of the tubular body (9), as well as provided with corresponding longitudinal rectilinear ribs (30 - 33) and bounded by plates (34 - 36), having the same shape as the inner cavity (15), of which the plate (34) is larger inside It cavity (15) and the plate (35, 36) is smaller than this inner cavity for slidable therein.  5. The shock absorber according to claim 4, characterized in that the friction means (37) consist of a friction liner made of suitable antifriction material and have first and second separate parts (39, 40), having the shape of elongated plates (38), each of which has sides (41, 42) coinciding with the sides of the inner cavity (15) of the tubular body (9), and these plates are made interacting with the inner cavity due to friction, each plate (38) located on the outside of the second ribbed section ( 29) rod (14) with ennymi between the plates and the rods resilient means (44, 45), these plates have a plurality of through holes (43) communicating with the resilient means and serving for the passage through them of grease or other suitable lubricating material.  6. The shock absorber according to claim 5, characterized in that the spring means consist of the first and second metal flat springs (44, 45) made of string steel having a shape suitable for the outlines of the respective plates (38) and the corresponding ribs (32, 33) of the second ribbed portion (29), wherein said first and second flat springs (44, 45) are provided with corresponding plates (51, 52), bent to the plane of the corresponding flat spring and turned towards the ribs (32, 33 ), for springing from them, and in addition, they t kzhe provided with slits (46 - 48) intended for the passage of grease or other flowing lubricant.  7. The shock absorber according to the preceding paragraphs, characterized in that the first and second half-shells (18, 19) have such a shape that along their contacting longitudinal rectilinear edges there is a corresponding group of radially protruding teeth (65, 66) and slots (67, 68), offset relative to each other to allow the teeth and slots of one half-shell to enter into connection with the slots and teeth of the other half-shell, and these half-shells are also equipped with gripping means (69) that interact with the rods (14) in such a way for epyatstviya its accidental extraction from the interior.  8. The shock absorber according to claim 7, characterized in that the gripping means consist of at least one notch (69) protruding into the internal cavity.  9. The shock absorber according to claim 7, characterized in that at least one of the half-shells (18) is equipped with pressed protrusions (70, 71) obtained by pressing, slightly protruding towards the inner cavity, forming the corresponding inclined surfaces (73, 74) with different direction of inclination, interacting with the friction liner (37) to create a braking action of variable intensity during sliding of the rod (14) in two opposite directions in the tubular body (9). 10. The shock absorber according to claim 7, characterized in that the friction liner (37) is fixed to the shaft (14) with the help of teeth (76) protruding from this shaft.