Combined sealing element structure for hydraulic breaking hammer

Abstract

The utility model discloses a combined sealing piece structure for a hydraulic breaking hammer, and particularly relates to a sealing piece, the combined sealing piece structure comprises an outer supporting ring, a middle-layer ring and an inner contact ring which are sequentially arranged from outside to inside, fitting parts are symmetrically arranged on the inner side of the inner contact ring, and supporting spring washers are symmetrically arranged on the inner contact ring and located between the two fitting parts. The adjacent side edges of the two supporting elastic pads are attached to each other. According to the combined sealing element structure provided by the utility model, the fitting parts are symmetrically arranged on the inner contact ring, so that the fitting parts can slightly turn over and deform when the piston rod moves, the extrusion force on the piston rod is reduced, and meanwhile, the sealing effect can be achieved by fitting the piston rod with the fitting parts; the adjacent side edges of the two supporting elastic pads are attached to each other, so that the supporting elastic pads can achieve the supporting effect when the attaching part deforms, and the supporting elastic pads can deform to weaken extrusion force borne by the attaching part when bearing acting force.

Description

Technical Field

[0001] The utility model relates to the technical field of seals, and particularly relates to a combined seal structure for a hydraulic breaker. Background Art

[0002] A hydraulic breaker is a heavy mechanical device mainly used for breaking concrete, rocks and other hard materials. The hydraulic breaker can generate a strong impact force in a short time, and the impact force can be used to demolish concrete buildings, mines, foundations, etc.

[0003] According to the patent publication number CN202883530U, a dynamic commutation and power compensation device for a hydraulic breaker is disclosed on April 17, 2013. It includes a valve body, a commutation spool and a commutation valve sleeve. The commutation spool and the commutation valve sleeve are installed in the valve body. There is a constant pressure chamber between the valve body and the commutation valve sleeve. The upper part of the constant pressure chamber is communicated with the dynamic oil chamber through a constant pressure hole. There is a dynamic spool in the dynamic oil chamber. There are grooves on the outer circle of the dynamic spool. There is a spring behind the dynamic spool. There is a valve seat behind the spring. There is a relief and compensation oil hole on the side of the spring.

[0004] In the prior art including the above patent, most of the sealing rings commonly used for sealing the piston rod in the middle cylinder of a hydraulic breaker are simple annular rings. When the sealing ring seals, it will be subjected to friction and extrusion force from the reciprocating movement of the piston rod. For this common annular ring sealing ring, due to its simple structure, the elastic property of the contact surface between it and the piston rod is poor when it seals. It often cannot transfer the extrusion force well when subjected to the extrusion force. Thus, most of the extrusion force will act on the sealing ring, and the sealing ring will undergo a relatively serious deformation after long-term use. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a combined seal structure for a hydraulic breaker to solve the above technical problems.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A combined seal structure for a hydraulic breaker includes an outer support ring, a middle layer ring and an inner contact ring arranged in sequence from outside to inside. The inner contact ring is symmetrically provided with fitting parts on the inner side, and support elastic pads are symmetrically arranged between the two fitting parts of the inner contact ring. The adjacent side edges of the two support elastic pads are mutually attached.

[0007] Preferably, the middle layer ring is symmetrically provided with hanging edges, and the inserted edges symmetrically arranged on the inner contact ring are respectively embedded in the inner sides of the hanging edges.

[0008] Preferably, the middle layer ring is provided with an arc part.

[0009] Preferably, the outer support ring is provided with a plurality of support pieces.

[0010] Preferably, the support pieces are symmetrically arranged on the outer support ring.

[0011] Preferably, the outer support ring is a neoprene ring.

[0012] In the above technical solution, a combined seal structure for a hydraulic breaker provided by the present utility model has the following beneficial effects: By arranging the outer support ring, the middle layer ring, and the inner contact ring adjacent to each other in sequence, when the inner contact ring is subjected to the pulling force of the piston rod, it can act on the outer support ring and the middle layer ring, thereby reducing the acting force on the inner contact ring. Secondly, by using the fitting parts symmetrically arranged on the inner contact ring, when the piston rod moves, the fitting parts can slightly flip and deform, thereby reducing the extrusion force caused to it. At the same time, by fitting it to the piston rod, it can also achieve a sealing effect. By making the adjacent sides of the two support spring pads fit together, when the fitting parts deform, the support spring pads can play a supporting role. Secondly, when the support spring pads are subjected to an acting force, they can also deform to weaken the extrusion force received by the fitting parts. Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0014] Figure 1 It is a schematic diagram of the overall sectional structure provided by the embodiment of the present utility model.

[0015] Description of the Reference Numerals:

[0016] 1. Outer support ring; 2. Middle layer ring; 3. Inner contact ring; 11. Support piece; 21. Arc portion; 22. Hanging edge; 31. Insertion edge portion; 32. Fitting portion; 33. Support spring pad. Detailed Embodiments

[0017] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the following will further introduce the present utility model in detail in conjunction with the drawings.

[0018] Such as Figure 1As shown in the figure, a combined seal structure for a hydraulic breaker includes an outer support ring 1, a middle layer ring 2, and an inner contact ring 3 arranged in sequence from outside to inside. On the inner side of the inner contact ring 3, fitting parts 32 are symmetrically arranged, and between the two fitting parts 32, support spring pads 33 are symmetrically arranged on the inner contact ring 3. One adjacent side of the two support spring pads 33 is mutually attached. By arranging the outer support ring 1, the middle layer ring 2, and the inner contact ring 3 adjacent to each other in sequence, when the inner contact ring 3 is subjected to the pulling force of the piston rod, it can act on the outer support ring 1 and the middle layer ring 2, thereby reducing the acting force on the inner contact ring 3. Secondly, by using the fitting parts 32 symmetrically arranged on the inner contact ring 3, when the piston rod moves, the fitting parts 32 can slightly flip and deform to reduce the extrusion force caused to them. At the same time, by fitting them to the piston rod, it can also achieve the sealing effect. Since one adjacent side of the two support spring pads 33 is mutually attached, when the fitting parts 32 deform, the support spring pads 33 can play a supporting role. Secondly, when the support spring pads 33 are subjected to acting forces, they can also deform to weaken the extrusion force received by the fitting parts 32.

[0019] Furthermore, one adjacent side of the two support spring pads 33 is in a mutually attached state. Therefore, when the two fitting parts 32 are respectively subjected to extrusion forces, the two support spring pads 33 can respectively move. Compared with their connected setting, the independent and separated setting can support the fitting parts 32 while avoiding the pulling force caused to the deformation of the fitting parts 32 due to connection, thereby improving the degree of flip of the fitting parts 32. Furthermore, the fitting parts 32 can better resist extrusion.

[0020] As a further technical solution provided by the present utility model, on the middle layer ring 2, hanging edge parts 22 are symmetrically arranged, and the inserted edge parts 31 symmetrically arranged on the inner contact ring 3 are respectively embedded inside the hanging edge parts 22.

[0021] Specifically, as Figure 1 shown, by using the inserted edge parts 31 on the inner contact ring 3 to be respectively embedded inside the hanging edge parts 22, while realizing the connection between the middle layer ring 2 and the inner contact ring 3, when the fitting parts 32 are subjected to extrusion or pulling, the hanging edge parts 22 can limit and fix the inserted edge parts 31, thereby preventing the inner contact ring 3 from detaching from the middle layer ring 2.

[0022] Furthermore, on the middle layer ring 2, an arc part 21 is arranged.

[0023] Specifically, the inner contact ring 3 is attached to the arc part 21. When the fitting parts 32 are subjected to extrusion or pulling and squeeze and flip towards the support spring pads 33, at this time, by using the deformation of the arc part 21 to support and deform the extrusion force received by the inner contact ring 3 on the side towards the support spring pads 33, the deformation is used to reduce the excessive extrusion and pulling force received by the fitting parts 32, thereby improving the service life of the fitting parts 32.

[0024] Furthermore, a plurality of support pieces 11 are provided on the outer support ring 1.

[0025] Specifically, by using the outer support ring 1 located outside the middle layer ring 2 and embedded in the middle layer ring 2, the middle layer ring 2 is supported. When the arc portion 21 on the middle layer ring 2 is subjected to extrusion deformation, by using the plurality of support pieces 11 provided on the outer support ring 1, the arc portion 21 is supported to prevent excessive deformation of the arc portion 21. At the same time, the extrusion force of the arc portion 21 can also be transmitted to the plurality of support pieces 11, and the deformation of the plurality of support pieces 11 is used to further reduce the extrusion force received by the fitting portion 32.

[0026] Moreover, the support pieces 11 are symmetrically arranged on the outer support ring 1.

[0027] Specifically, by symmetrically arranging the support pieces 11 on the outer support ring 1, when the piston rod reciprocates between the inner contact rings 3, the support force received by the inner contact rings 3 can be uniform.

[0028] Further, the outer support ring 1 is a neoprene ring.

[0029] Working principle: By arranging the outer support ring 1, the middle layer ring 2 and the inner contact ring 3 adjacent to each other in sequence, when the inner contact ring 3 is subjected to the pulling force of the piston rod, it can act on the outer support ring 1 and the middle layer ring 2, thereby reducing the acting force on the inner contact ring 3. Secondly, by using the fitting portions 32 symmetrically arranged on the inner contact ring 3, when the piston rod moves, the fitting portions 32 can be slightly turned and deformed to reduce the extrusion force caused to them. At the same time, by fitting them to the piston rod, it can also achieve a sealing effect. By making the adjacent sides of the two support elastic pads 33 fit together, when the fitting portion 32 deforms, the support elastic pads 33 can play a supporting role. Secondly, when the support elastic pads 33 are subjected to an acting force, they can also deform to weaken the extrusion force received by the fitting portion 32. When the fitting portion 32 is subjected to extrusion or pulling and is squeezed and turned towards the support elastic pad 33 side, at this time, by using the deformation of the arc portion 21 to support and deform the extrusion force received by the inner contact ring 3 on the side towards the support elastic pad 33, thereby using the deformation to reduce the excessive extrusion and pulling force received by the fitting portion 32, thus improving the service life of the fitting portion 32.

[0030] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. A combined seal structure for a hydraulic breaker, characterized in that, It includes an outer support ring (1), a middle layer ring (2) and an inner contact ring (3) arranged from outside to inside in sequence. Fitting parts (32) are symmetrically arranged on the inner side of the inner contact ring (3), and support spring pads (33) are symmetrically arranged between the two fitting parts (32) on the inner contact ring (3). The adjacent sides of the two support spring pads (33) are in contact with each other.

2. The combined seal structure for a hydraulic breaker according to claim 1, characterized in that, Hanging edges (22) are symmetrically arranged on the middle layer ring (2), and insertion edge parts (31) symmetrically arranged on the inner contact ring (3) are respectively embedded into the inner sides of the hanging edges (22).

3. A combined seal structure for a hydraulic breaker according to claim 1, characterized in that, An arc-shaped part (21) is arranged on the middle layer ring (2).

4. A combined seal structure for a hydraulic breaker according to claim 1, characterized in that, A plurality of support pieces (11) are arranged on the outer support ring (1).

5. The structure of a combined seal for a hydraulic breaker according to claim 4, characterized in that, The support pieces (11) are symmetrically arranged on the outer support ring (1).

6. The combined seal structure for a hydraulic breaker according to claim 1, characterized in that, The outer support ring (1) is a neoprene ring.

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