KR20160149915A

KR20160149915A - Seal of tool and method of sealing

Info

Publication number: KR20160149915A
Application number: KR1020150087747A
Authority: KR
Inventors: 오씨 까흐라; 위르끼 니씨넨
Original assignee: 산드빅 마이닝 앤드 컨스트럭션 오와이
Priority date: 2015-06-19
Filing date: 2015-06-19
Publication date: 2016-12-28
Also published as: KR101708171B1

Abstract

The present disclosure relates to a seal of a tool of a breakaway hammer, a sealing arrangement, a breakaway hammer, and a method of sealing the tool of the breakaway hammer. The seal is a sealing ring, and an outer circumferential portion (23) of the sealing ring is provided with a plurality of inclined (S) protruding elements. The protruding elements generate torque in the sealing ring when pushed in the transverse direction (T) when using the breaking hammer (1). Therefore, the sealing ring can be rotated (R) with respect to the tool 6.

Description

TECHNICAL FIELD [0001] The present invention relates to a method of sealing a tool,

The present invention relates to a seal of a tool of a breaking hammer. The seal is a ring-shaped piece. The inner periphery of the seal serves as a sealing surface for the tool.

The present invention also relates to a method of sealing a tool of a sealing arrangement, crushing hammer and crush hammer.

The field of the invention is more specifically defined in the preamble of the independent claims.

Fractured hammers are used to crush hard materials such as rocks, concrete and the like. The crush hammer includes a percussion device that generates impact pulses on a crushing tool connectable to a crush hammer. The tool is sealed to the body or other surrounding structure of the breakage hammer by tool sealing, which is generally a sealing ring. Conventional sealing arrangements have been shown to include, for example, some disadvantages to their wear resistance.

It is an object of the present invention to provide a new and improved seal of a tool. Another object is to provide a new and improved sealing arrangement, a breaking hammer, and a method of sealing a tool, all aimed at reducing wear of the tool seal.

The seal according to the present invention is characterized in that a plurality of protruding elements are provided on the outer circumferential portion of the sealing ring and the protruding elements are inclined with respect to the normal of the outer circumferential portion when viewed in the axial direction of the sealing ring .

The sealing arrangement according to the invention is characterized in that the sealing ring is according to any one of claims 1 to 6 and the sealing ring is allowed to rotate with respect to the sealing housing and tool in the circumferential direction thereof.

The breaking hammer according to the invention is characterized in that the sealing ring is according to any one of claims 1 to 6 and the sealing ring is allowed to rotate with respect to the sealing housing and the tool in the circumferential direction thereof.

The method according to the invention uses said elastic sealing ring provided with inclined projecting elements at the outer periphery of the sealing ring; The sealing ring being subjected to forces across the longitudinal axis of the tool during use of the breaking hammer; Wherein the inclined projecting elements of the sealing ring are reversibly deformed due to transverse biasing forces; Returning the shape of said sloping protruding elements to their initial condition after the compression biasing force is terminated and torque is generated in said sealing ring by return; And rotating the sealing ring with respect to the tool and the sealing housing by the generated torque.

The idea of the disclosed solution is that the sealing ring of the tool is rotated in its peripheral direction during use of the breakaway hammer. The lateral force to which the tool and the sealing ring is subjected is used to generate the torque required in the sealing ring. The generated torque is based on the inclined protruding elements of the outer circumferential portion of the sealing ring. The inclined projecting elements are reversibly deformed due to the transverse forces, and this torque is generated during the return phase by returning after the transverse forces are terminated.

An advantage of the disclosed approach is that the life of the seal may be longer compared to conventional seals because the sealing ring is pivoted or rotated during its use. Between the tool and the seal there is a sealing surface, which is generally subject to localized or oriented wear. The sealing ring now changes its position with respect to the tool, and the wear effect is more evenly distributed over the entire sealing surface, despite the oriented lateral forces. For this reason, the durability of the sealing ring is improved.

In addition, the operating life of the crush hammer may be longer when the seal is operating properly and preventing impurities from entering the crush hammer structure. Likewise, the seal may prevent the lubricating grease from leaking out of the breakage hammer, thereby extending the service life of the tool. Finally, the disclosed approach can extend the lifetime of the sealing ring itself, as well as the sealed structure, and further reduce the need for service and non-operating time.

According to one embodiment, the sealing ring is allowed to rotate relative to the sealing housing and the tool in its peripheral direction. The tool is subjected to transverse forces that cause relative movement between the tool and the sealing housing during use. Relative motion between the tool and the sealing housing in the direction transverse to the longitudinal axis of the tool is configured to cause reversible deformation and return of the projecting elements inclined on the outer periphery of the sealing ring. Subsequent deformation and return generate torque and cause the sealing ring to rotate. Thus, there are several switching elements between the sealing housing and the sealing ring that convert some of the lateral force directed at the sealing ring into the torque of the sealing ring.

According to one embodiment, the inclined projecting elements on the outer periphery of the sealing ring are flexible or compressible so that the sealing ring can move transversely into the sealing housing due to lateral forces oriented in the tool. The protruding elements may serve as dampening elements in addition to acting as torque generating elements. Because of this damping, the lateral movement of the sealing ring does not deform the shape of the inner periphery of the sealing ring, and thus the roundness of the inner periphery may be maintained. Thus, damping is aimed at ensuring that the sealing surface remains unchanged. In addition, the damping can reduce the surface pressure between the tool and the inner periphery of the sealing ring, since the protruding elements can act as a flexible or compressible portion in the sealing ring.

According to one embodiment, the sealing housing is provided with a roughening to increase friction between the sealing ring and the sealing housing. The surface roughening portion may be, for example, knurling or grooving. Alternatively, or additionally, the outer surfaces of the protruding elements can have a roughened surface for the same reason. Increased friction prevents slippage that may be between the contact surfaces and ensures proper rotation of the sealing ring.

According to one embodiment, the sealing ring is a so-called massive sealing ring. Thus, the relative dimensions of the axial length L and the radial thickness RT have a predetermined range. In addition, the maximum outer diameter (D) and the minimum inner diameter (d) of the sealing ring have a predetermined range. The radial thickness (RT) may be calculated by equation (D-d) / 2. In a massive sealing ring, the first ratio (L / RT) is 0.5 to 2 and the second ratio (D / d) is 1.3 to 3. Massive sealing rings are rigid and durable. The massive sealing ring naturally tolerates transverse forces and wear directed at the massive sealing ring.

According to one embodiment, the outer circumferential portion of the sealing ring is tooth-shaped including a plurality of inclined toothed portions. Thus, the beveled teeth act as inclined protruding elements.

According to one embodiment, the outer circumferential portion of the sealing ring is tooth-shaped including a plurality of inclined toothed portions. In addition, each tooth of the outer circumferential portion of the sealing ring includes flank surfaces, which are inclined with respect to the normal of the outer peripheral portion when viewed in the axial direction of the sealing ring.

According to one embodiment, the outer circumferential portion of the sealing ring is tooth-shaped including a plurality of inclined toothed portions. In addition, each tooth of the outer circumferential portion of the sealing ring includes flank surfaces, which are inclined with respect to the normal of the outer peripheral portion when viewed in the axial direction of the sealing ring. Each toothed portion has a first flank surface, a second flank surface, and a leading end. In addition, the first flank surface is curved when viewed in the axial direction, and the second flank surface is flat. The tip may be curved.

According to one embodiment, the outer circumferential portion of the sealing ring is tooth-shaped including a plurality of inclined toothed portions. In addition, each tooth of the outer circumferential portion of the sealing ring includes flank surfaces, which are inclined with respect to the normal of the outer peripheral portion when viewed in the axial direction of the sealing ring. Each toothed portion has a first flank surface, a second flank surface, and a leading end. In addition, the first flank surface and the second flank surface are flat when viewed in the axial direction. The tip may be curved.

According to one embodiment, the protruding elements of the sealing arrangement are bars, pegs, fins, studs or corresponding protruding or protruding elements or pieces of corresponding shape. These elements are also inclined as described above, so that they can generate the torque necessary to rotate the sealing ring when they are affected by the lateral forces. Thus, the disclosed teeth may be replaced by other types of inclined elements, at least in some instances.

According to one embodiment, the seal is made of one or more elastic materials. The elastic material may be temporarily compressed or reshaped and may be returned to the initial shape of the elastic material after the biasing force is terminated.

According to one embodiment, the sealing ring is made of a material such as elastic rubber or rubber.

According to one embodiment, the sealing ring is made of an elastic polymer such as polyurethane (PU). Several other elastomeric polymeric materials may also be used.

According to one embodiment, the sealing ring is made of an elastic material provided with suitable internal damping. The inclined projecting elements of the sealing ring can then be bent when the sealing ring is subjected to a transverse biasing force and can be returned to its original shape after the biasing force is terminated.

According to one embodiment, the sealing ring is provided with a plurality of predetermined articulation points, which allow the external shape of the sealing ring to change during the mounting period of the sealing ring. By virtue of the joint points, the sealing ring may be a single uniform piece, and nevertheless, the sealing ring may be readily mounted in place in the sealing housing. The articulating points make the structure of the sealing ring more intensive compared to the basic structure of the sealing ring, and also less force is required. The joint system is particularly desirable for so-called massive sealing rings which are relatively rigid and difficult to mount. The number of joint points may be two, three, four, or even more.

According to one embodiment, the sealing ring has a plurality of slits, which serve as joint points and allow the external shape of the sealing ring to be temporarily deformed. Thus, the sealing ring comprises at least two outer slits in the outer periphery and at least one inner slit in the inner periphery. The slits have a limited radial dimension without extending to the opposite periphery of the sealing ring and without shearing the sealing ring into the parts. Thus, the sealing ring is a single uniform piece despite the slits. Also, at least two of the outer slits define a mounting sector region therebetween. At least one inner slit is located in the mounting sector area. The outer slit and the inner slit allow the mounting sector area to be pushed inward during mounting to reduce the outer dimension of the sealing ring during the mounting of the sealing ring. After the sealing ring is disposed in a correct configuration at the correct position inside the sealing housing, the biasing force is removed and the sealing ring assumes its original shape and external dimensions.

According to one embodiment, the sealing ring has two outer slits in the outer periphery and one inner slit in the inner periphery. The outer slit defines a mounting sector area having a sector angle of 100 to 120 degrees. The inner slit is located in the middle of the mounting sector area. The sealing ring may be set to the mounting state during the mounting period by pushing the mounting sector area inward. The sealing ring may be similar to the lower case omega code (omega), as the slits serve as joint points and allow the sealing ring to modify its outer shape. When the biasing force directed to the mounting area is terminated, the sealing ring may assume an initial shape and an external dimension.

According to one embodiment, the sealing ring has a plurality of slits, which serve as joint points. The slits may end up to axial drilling or to the corresponding crack preventing end space. By virtue of this embodiment, the formation of cracks can be avoided, so that the durability of the sealing ring is improved.

According to one embodiment, both the sealing ring and the sealing housing have a uniform or non-fractured structure. If jointing points such as slits are provided in the sealing ring, it can be mounted in place as a uniform single piece. There is no need to form a two-part sealing housing, so that the structure of the sealing housing may become more rigid. The sealing housing is located at the lower end of the crushing hammer and is thus blown and stressed. A uniform sealing housing can withstand harsh environments. Further, the uniform structure improves the rotation of the sealing ring as compared with the sealing ring composed of two halves. It is noted in the experiments that when the sealing ring is cut into individual pieces, the end faces of the pieces resist rotation and the desired effect is not achieved.

According to one embodiment, the breakaway hammer includes a protective casing surrounding the impact device. The protective casing can protect the impact device against impurities and dents. In addition, the protective casing can damp the noise of the impact device. The lower end of the protective casing has a tool hole arranged to pass the tool. Therefore, the sealing housing and the sealing ring are located in the tool hole of the protective casing.

According to one embodiment, the striking device comprises a frame, and the sealing housing and the sealing ring are located at the tool-side end of the frame. Thus, the breakaway hammer has no protective casing surrounding the impact device.

According to one embodiment, the breakaway hammer includes a separate sealing frame piece mounted to the tool side end of the breakaway hammer. The sealing frame piece has a sealing housing and a sealing ring. The sealing frame piece may be mounted on the lower end of the protective casing surrounding the striking device. Alternatively, the sealing frame piece may be mounted at the lower end of the frame of the striking device, provided that there is no protective casing in the striking hammer. The individual sealing frame pieces may be components that are easy to mount and dismount.

It is mentioned that the sealing of the tool of the breakaway hammer can be applied to other types of breakaway hammers other than those disclosed in this patent application. The striking or impacting device may for example be different from that shown.

The above-described embodiments may be combined to form the desired scheme with the required features disclosed.

Some embodiments are described in further detail in the accompanying drawings.

1 is a schematic side view of an excavator with a crush hammer;
2 is a schematic side cross-sectional view of a breakaway hammer.
3 is a schematic side cross-sectional view of the lower end of a breakaway hammer with a rotating sleeve ring.
4 is a perspective view of the same object.
5 is a schematic perspective view of a sealing ring provided with a tooth portion on the outer peripheral portion thereof.
6A is a schematic axial view of detail H showing a portion of the tooth in its initial state.
Fig. 6B shows the situation when the sealing ring is subjected to lateral movement.
Figure 7 is a schematic axial view of the sealing ring
8 is a schematic partial cross-sectional side view of the sealing ring shown in Fig.
Figures 9 and 10 are schematic axial views of an alternative sealing ring not in accordance with the claimed invention, since the outer periphery of the sealing ring is smooth and the sealing ring has no rotary feature.

For clarity, the figures show some embodiments of the disclosed scheme in a simplified manner. In the drawings, the same reference numerals denote the same elements.

Figure 1 shows a breakaway hammer 1 disposed at the free end of the boom 2 in an operating machine 3, such as an excavator. Alternatively, the boom 2 may be arranged on a fixed platform of any movable carriage or squeezing device. The breaking hammer 1 includes a striking device 4 for generating an impact pulse. The breaking hammer 1 can be pressed by the boom 2 against the material 5 to be broken and the impact is simultaneously generated by the breaking device 4 against the tool 6 connected to the breaking hammer 1 Which delivers an impulse pulse to the material 5 to be fractured. The striking device 4 may also be hydraulic so that it may be connected to the hydraulic system of the operating machine 2. [ Alternatively, the striking device 4 may be driven electrically or pneumatically. The impact pulse may be generated in the impacting device 4 by a blowing element such as a blowing piston which can be moved back and forth in the impact direction and the return direction under the influence of the hydraulic fluid. The breaking hammer 1 may also comprise a protective casing 7 in which the striking device 4 can be located inside. At the lower end of the breaker hammer, that is, at the tool-side end, there is a sealing arrangement 8 for sealing the tool 6 against the peripheral structure of the breaker hammer. The sealing arrangement 8 comprises the sealing ring disclosed in this patent application.

Fig. 2 discloses the structure of the crush hammer 1. The breaking hammer includes a lower end (A) at the tool side end and an upper end (B) having mounting means for connecting the breaking hammer (1) to the boom. Inside the protective casing 7 is a striking device 4 which may comprise a striking piston 9 arranged to move back and forth with respect to the frame 10 of the striking device 4. The impact surface (11) of the striking piston (9) is arranged to pry the upper end (12) of the tool (6). The tool 6 may be connected to the breakage hammer 1 by means of a transverse connecting pin. The tool 6 is allowed to move in the axial direction P during use. At the lower end of the crush hammer 1 there is a sealing arrangement 8 which includes a sealing ring 14 for passing the tool 6 therethrough. A sealing ring (14) is arranged in the sealing housing (15) surrounding the tool (6). The sealing housing 15 may be formed at the lower end of the protective casing 7. As already mentioned above, alternatively, the sealing housing may be part of the frame 10 of the striking device if no protective casing is present. Another possibility is that a separate sealing assembly 16, shown in broken lines in FIG. 2, is mounted at the lower end of the protective casing 7. During use of the breaking hammer 1, the tool 6 is subjected to a force in the lateral direction T, in addition to the operating force oriented in the axial direction P. The tool 6 is moved in the lateral direction T by this lateral force. The sealing ring 14 needs to withstand this lateral movement and keep the sealing airtight. In this embodiment, the lateral force and motion are utilized to generate torque in the sealing ring 14 to rotate the sealing ring against the tool 6. When the tool 6 is repeatedly moved in one or several transverse directions, the sealing ring 14 is subject to local wear due to lateral movement. This is a typical situation in the crush hammer 1. However, thanks to the rotating sealing ring 14, the relative position between the tool 6 and the sealing surface of the sealing ring 14 can be constantly changed, so that the wear of the sealing surface is more uniformly distributed.

Figures 3 and 4 show the sealing housing 15 and the sealing ring 14 in more detail. The sealing housing 15 may be formed in the sleeve piece 17 which may be supported by the bottom plate 18 at the lower end A of the protective cover 7. [ The first bottom plate component 18a may also axially support the sealing ring 14. There may also be a second bottom plate component 18b around the piece 17, which may serve as a protective element around the sealing housing 15. The bottom plate components 18a, 18b may also be fastened together in a fixed manner. The mounting sleeve 20 may also be fastened to the lower end of the protective casing 7 and may support the sleeve-like pieces 17,18. When the sealing ring 14 is assembled to the sealing housing 15, the tool 6 may be first removed, and then the sealing ring 14 may be urged to a smaller external dimension so that it is pushed into the sealing housing 15 . Thereafter, the tool 6 is pushed through the sealing ring 14 to the desired position and locked by one or more locking pins. Thus, in the disclosed method, only changing the sealing ring 14 requires that the tool 6 be disassembled. The sealing ring 14 prevents impurities from entering the inside of the structure of the crush hammer 1. In addition, the sealing ring has a second purpose of preventing the lubricating grease or the corresponding lubricant from leaking out of the lubricating space 21. The tool 6 may be subjected to limited motion in the lateral direction T during operation. As described above in the present patent application, the transverse motion is converted to the rotation R of the sealing ring 14.

5 shows a sealing ring 14 having a tooth 22 on the outer periphery 23 thereof. The teeth 22 serve as the above-mentioned inclined protruding elements, which can convert the lateral movement of the sealing ring 14 into a torque for generating rotation. The tooth 22 is inclined (S) with respect to the normal N of the outer peripheral portion 23, as shown in Fig. The teeth 22 are inclined only when viewed in the axial direction of the sealing ring 14. [ The inner periphery 24 of the sealing ring 14 serves as a sealing surface for the tool. The sealing ring 14 may include a mounting sector 25 for facilitating mounting of the sealing ring 14 as a single piece in the sealing housing. The mounting sector 25 region is defined by at least two outer slits 26, 27 in the outer periphery 23. Also, at least one inner slit (28) is located in the inner periphery (24). The slits 26-28 do not extend to the periphery of the opposite side of the sealing ring 14 and have a limited radial dimension without shearing the sealing ring 14 into portions. The outer slits 26 and 27 and the inner slit 28 enable the mounting sector area 25 to be pushed inward during mounting to reduce the outer dimension of the sealing ring 14 during the mounting period. The slits 26-28 can be terminated in the axial drilling or corresponding end space 29, which can prevent cracking. In the inner slit 28, two adjacent toothed portions 22a may be formed so that the inner slit 28 and the end space 29 are properly positioned. The slits 26,27 and 28 define the joint point 30 which allows the mounting sector components 25a and 25b of the sealing ring 14 to bend inward. The mounting of the sealing ring 14 is described in more detail in Figures 7, 9 and 10. [

Fig. 6A is a detail view of H in Fig. 7, showing some of the teeth 22 in an initial state, Fig. 6B is a cross sectional view of the sealing ring 14 when it is subjected to a lateral movement caused by a force F Show the situation.

The outer peripheral portion 23 of the sealing ring 14 is toothed with a plurality of inclined toothed portions 22. The normal direction N of the outer peripheral portion 23 as well as the oblique direction S are shown in Fig. 6A. Each tooth 22 includes flank surfaces 31 and 32 which are inclined with respect to the normal N when viewed in the axial direction of the sealing ring 14. [ Each tooth 22 has a first flank surface 31, a second flank surface 32 and a tip 33. The first flank surface 31 may be curved when viewed in the axial direction and the second flank surface 32 may be flat. Alternatively, the first flank surface 31 may be a flat surface and the second flank surface 32 may be curved. The distal end portion 33 may be curved.

6B, the sealing ring 14 is pushed toward the sealing housing 15. 6B shows that the teeth 22G are compressed when the gap G between the tool 6 and the sealing housing 15 is reduced. Alternatively, or additionally, the toothed portions may be reversibly bent and deformed as shown by the toothed portion 22F. When the deforming force F ends and the gap G expands, the deformed teeth portions 22G and 22F return to their initial shape. Then, the tangential force component Ft as well as the radial force component Fr are generated. The tangential force component Ft generates torque and rotates the sealing ring 14 (R). The inclined element, such as the tooth 22 in the peripheral portion 23, thus acts as a switching element or spring element for converting the lateral force F into torque, In order to generate a rotational motion.

6B shows an inner surface of the sealing housing 14 facing the sealing ring 14 is provided with a roughening portion 34 for improving the rotation R of the sealing ring 14 and preventing slippage when the generated torque is present ) In a very simplified manner.

In Fig. 7, the sealing ring is shown in the axial direction. The main features of the sealing ring 14 have already been disclosed above. The sealing ring is a single uniform piece. To facilitate its mounting, the sealing ring 14 has slits 26-28 for creating a mounting sector 25 area. It is shown in Figure 7 that the mounting force M may be directed to the sealing ring 14 to push the mounting sector area 25 inward. The mounting sector components 25a, 25b can then be bent relative to each other and to the remainder of the sealing ring structure. Thus, the outer diameter of the sealing ring during the mounting period can be reduced. Since the sealing ring is made of an elastic material, it will be returned to its initial shape after the mounting force M has ended.

It is noted that it is also possible that the disclosed sealing ring with inclined protruding elements may in some cases not have the disclosed slit. The sealing housing may be formed, for example, in half.

Figure 8 shows that the tooth 22 or corresponding protruding elements are not angled in the axial direction. Figure 8 also shows dimensions such as length L, radial thickness RT, inner diameter d, and outer diameter D. The sealing ring 14 may be a so-called massive seal, the relative dimensions of which are specified above in the present patent application.

An alternative approach to the above-mentioned approach includes an individual support piece surrounding the sealing ring and also causing a torque to rotate the sealing ring. An individual resilient support piece with a hole is disposed in the sealing housing. In the hole, inclined elements are provided. Thus, the inner surface of the bore of the support piece may, for example, comprise an inclined tooth. In this alternative embodiment, the outer periphery of the sealing ring may be smooth or may be disposed with respect to the angled elements of the hole of the support piece. The inclined elements of the support piece may cause rotation in the sealing ring when the tool and the sealing ring are moved in the lateral direction. Thus, the sealing ring does not have inclined elements to produce torque, and the inclined elements are in the inner periphery of the individual support pieces. The support piece may be made of an elastic material. The support piece may be non-movably fastened to the sealing housing. The principle of generating the rotation is the same as described above in the present patent application. A sealing arrangement of this kind can be defined as follows: a tool which is a elongated piece; A support piece positioned around said tool and comprising a hole; An annular gap between the outer surface of the tool and the inner surface of the bore of the support piece; And a sealing ring disposed in the annular gap for sealing the tool, wherein the inner surface of the hole of the support piece includes a plurality of protruding elements that are inclined when viewed in the axial direction of the tool ; The support piece being made of an elastic material; The lateral motion of the tool and the sealing ring is configured to produce a torque for rotating the sealing ring relative to the tool. According to the first embodiment, the inner surface of the hole of the support piece has a toothed portion, and the toothed portion is inclined. Also, in this regard, the sealing ring may be made of an elastic material, or alternatively may be made of any other suitable material, such as bronze. Thus, the sealing ring may also be a non-elastic material.

Also, alternate approaches not currently contemplated in accordance with the present invention are also disclosed in Figures 9 and 10. The sealing ring 14 for sealing the tool of the breaker hammer may not have the above-described rotational characteristics. However, it may also include other features disclosed in this patent application. The sealing ring 14 may have slits as described above to facilitate mounting of the sealing ring. However, the outer periphery of the sealing ring may not have the disclosed inclined protruding elements (teeth, etc.) since the sealing arrangement may not have the features described with respect to the rotation of the sealing ring relative to the tool and the sealing housing. Therefore, the outer peripheral portion of the sealing ring 14 may be smooth. Seals of this kind can be defined as follows: A seal of a tool of a striking breakdown hammer, wherein the seal is a ring-shaped piece having an inner periphery, an outer periphery and an axial length; Said inner periphery being adapted to act as a sealing surface and to be disposed against a tool to be sealed; The outer peripheral portion being adapted to face the sealing housing; The sealing ring is made of an elastic material; The sealing ring comprising at least two outer slits in the outer periphery and at least one inner slit in the inner periphery; The slits do not extend to the opposite periphery of the sealing ring and have a limited radial dimension without shearing the sealing ring into the portions; Said at least two outer slits defining a mounting sector region therebetween; The at least one inner slit is located in the mounting sector area and the outer and inner slits allow the mounting sector area to be pushed inward during mounting to reduce the outer dimension of the sealing ring during the mounting period. The initial outer diameter D can be reversibly deformed to a smaller mounting diameter DM. The first embodiment of the seal may include the following additional features: The sealing ring has two outer slits 26, 27 in the outer periphery 23 and one inner A slit (28); The mounting sector area 25 defined by the outer slits has a sector angle SA of 100 to 120 degrees; The at least one inner slit (28) being located in the middle of the mounting sector area (25); The sealing ring 14 is similar to the lower case omega code (omega) when it is set to the mounting state by pushing the mounting sector area inward to mount the sealing ring 14. The second embodiment of the sealing ring 14 may include the following additional features: The slits 26-28 may be terminated in the axial drills or in the corresponding crack preventing end spaces 29 . The third embodiment of the sealing ring may include the following additional features: Both the sealing ring 14 and the sealing housing 15 have a uniform or unbroken structure. According to a fourth embodiment, the sealing ring is a massive sealing ring as described above in this patent application. Furthermore, the sealing ring may be made of the above-described materials, and may be utilized in the above arrangement and the breaking hammer. Thus, the only difference between the schemes disclosed in Figs. 9 and 10 for the other schemes disclosed in Figs. 1-8 may be that there are no inclined elements in the outer periphery.

The features shown in Figs. 5 to 10 for facilitating the mounting of a uniform sealing ring can be utilized in all embodiments, although not all features are described in detail in the description of each and every drawing.

The drawings and the related description are only for explaining the idea of the present invention. In the details, the invention may vary within the scope of the claims.

Claims

As a seal of a tool of a breaking hammer,
The seal is a ring shaped piece having an inner periphery 24, an outer periphery 23 and an axial length L,
The inner periphery 24 serves as a sealing surface and is arranged with respect to the tool 6 to be sealed,
The outer peripheral portion 23 faces the sealing housing 15,
The sealing ring 14 is made of an elastic material,
The outer circumferential portion 23 of the sealing ring 14 is provided with a plurality of protruding elements,
Characterized in that the projecting elements are inclined with respect to the normal line (N) of the peripheral portion (23) when viewed in the axial direction of the sealing ring (14).

The method according to claim 1,
Characterized in that the outer periphery (23) of the sealing ring (14) comprises a plurality of inclined teeth (22) toothed.

3. The method of claim 2,
Each of the teeth 22 of the outer periphery 23 of the sealing ring 14 includes flank surfaces 31 and 32 which define the flank surfaces of the sealing rings 14 when viewed in the axial direction of the sealing ring 14. [ Is inclined with respect to a normal line (N) of the outer peripheral portion (23).

The method of claim 3,
Each tooth 22 has a first flank surface 31, a second flank surface 32, and a tip 33,
The first flank surface 31 is curved when viewed in the axial direction, the second flank surface 32 is flat,
Characterized in that the tip (33) is curved.

5. The method according to any one of claims 1 to 4,
The sealing ring 14 includes at least two outer slits 26 and 27 in the outer periphery 23 and at least one inner slit 28 in the inner periphery 24,
The slits (26, 27, 28) have a limited radial dimension without extending to the opposite periphery of the sealing ring (14) without shearing the sealing ring (14)
Said at least two outer slits (26, 27) defining a mounting sector region (25) between said outer slits,
The at least one inner slit (28) is located in the mounting sector area (25)
Characterized in that the outer slit and the inner slit (26, 27, 28) cause the mounting sector area (25) to be pushed inward during mounting to reduce the outer dimensions of the sealing ring (14) , Tool seals.

6. The method of claim 5,
The sealing ring 14 is provided with two outer slits 26 and 27 in the outer periphery 23 and one inner slit 28 in the inner periphery 24,
The mounting sector area 25 defined by the outer slits 26, 27 has a sector angle SA of 100 to 120 degrees,
The inner slit (28) is located in the middle of the mounting sector area (25)
Characterized in that the sealing ring (14) resembles a lower case omega code (omega) when it is set into the mounting state by pushing in the mounting sector area (25) for mounting of the sealing ring (14).

As a sealing arrangement,
The elongated piece of tool 6,
A sealing housing 15 located around the tool 6, and
An annular gap (G) between the inner surface of the sealing housing (15) and the outer surface of the tool (6), and
, And a sealing ring (14) arranged to seal the gap (G)
The sealing ring (14) is according to any one of claims 1 to 6,
Characterized in that the sealing ring (14) is rotated (R) in its peripheral direction relative to the sealing housing (15) and the tool (14).

8. The method of claim 7,
The relative movement between the tool 6 and the sealing housing 15 in the transverse direction T with respect to the longitudinal axis of the tool 6 results in a relative movement between the tool 6 and the sealing housing 15, Is configured to cause reversible deformation and return and to generate a rotation (R) of the sealing ring (14).

9. The method according to claim 7 or 8,
Characterized in that at least the sealing housing (15) is provided with a roughening (34) for increasing the friction between the sealing ring (14) and the sealing housing (15).

As a breaking hammer,
The striking devices 4,
A tool (6) connectable to the striking device (4)
A sealing housing 15 located around the tool 6, and
And a sealing ring (14) located in said sealing housing (15)
The sealing ring 14 has an opening through which the tool 6 passes so that the sealing ring 14 is configured to seal the gap G between the tool 6 and the sealing housing 15 ,
The sealing ring (14) is according to any one of claims 1 to 6,
Characterized in that the sealing ring (14) rotates (R) in its peripheral direction relative to the sealing housing (15) and the tool (14).

11. The method of claim 10,
Characterized in that the breaking hammer (1) comprises a protective casing (7) surrounding the striking device (4)
The protective casing (7) is provided with a tool hole arranged to pass the tool (6)
Characterized in that the sealing housing (15) and the sealing ring (14) are located in tool holes of the protective casing (7).

11. The method of claim 10,
The striking device (4) comprises a frame (10)
Characterized in that the sealing housing (15) and the sealing ring (14) are located at the tool side end (A) of the frame (10).

11. The method of claim 10,
The crush hammer 1 includes a separate sealing frame piece 16 mounted on the tool side end A of the crush hammer 1,
Characterized in that the sealing frame piece (16) is provided with the sealing housing (15) and the sealing ring (14).

CLAIMS 1. A method of sealing a tool of a break-
Providing at least one sealing ring (14) to the crush hammer (1)
Arranging the sealing ring (14) in the sealing housing (15) of the crush hammer (1), and
Passing the tool (6) through a hole in the sealing ring (14)
Using an elastic sealing ring 14 provided with inclined projecting elements in the outer periphery 23 of the sealing ring 14,
The use of the crush hammer 1 causes the sealing ring 14 to be subjected to a force in the transverse direction T on the longitudinal axis of the tool 6,
To allow the inclined projecting elements of the sealing ring 14 to be reversibly deformed due to the lateral deflection force F,
Returning the shape of said sloping protruding elements to its initial state after said deflection force (F) has ended and generating a torque in said sealing ring (14) by said return, and
, And rotating (R) the sealing ring (14) with respect to the tool (6) and the sealing housing (15) by the generated torque.

15. The method of claim 14,
Characterized in that a torque is generated for rotation (R) of the sealing ring (14) by the inclined teeth (22) on the outer periphery (23) of the sealing ring (14).