WO2020178466A1 - Sistema de fijación de elementos de desgaste en máquinas de movimiento de tierras - Google Patents
Sistema de fijación de elementos de desgaste en máquinas de movimiento de tierras Download PDFInfo
- Publication number
- WO2020178466A1 WO2020178466A1 PCT/ES2020/070149 ES2020070149W WO2020178466A1 WO 2020178466 A1 WO2020178466 A1 WO 2020178466A1 ES 2020070149 W ES2020070149 W ES 2020070149W WO 2020178466 A1 WO2020178466 A1 WO 2020178466A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wear elements
- stem
- locking element
- machines according
- elements
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
- E02F9/2808—Teeth
- E02F9/2816—Mountings therefor
- E02F9/2833—Retaining means, e.g. pins
- E02F9/2841—Retaining means, e.g. pins resilient
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
- E02F9/2808—Teeth
- E02F9/2816—Mountings therefor
- E02F9/2825—Mountings therefor using adapters
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
- E02F9/2808—Teeth
- E02F9/2816—Mountings therefor
- E02F9/2833—Retaining means, e.g. pins
Definitions
- the present invention relates to a system for fixing wear elements in earth-moving machines, in particular, to a system for fixing a tooth to a tooth-holder of an earth-moving machine, although it can also be used for the attachment of any wear item, including lip guards and side guards.
- Earth-moving machines such as, for example, excavators or loaders for construction work, mining, etc. They comprise a shovel or bucket that is subjected to high stresses and great erosion, especially in the area of the lip (also called a blade).
- the lips tend to have a plurality of built-in protection or wear elements, such as:
- - teeth have the function of penetrating the ground and protecting the blade of the bucket or shovel
- - tooth holder or adapter they have the function of protecting the blade and, above all, supporting the teeth,
- - frontal protectors they protect the lip in the areas between the teeth and also have a penetrating function, but to a lesser extent than the tooth,
- wear or protection elements are subject to strong mechanical stresses, plastic deformations and strong wear. For this reason, it is usual that they must be replaced with a certain frequency, when the wear suffered requires it.
- Wear or protection elements can be mechanically fixed, they are easier and faster to change or welded they are cheaper but difficult to change and with the risk of damaging the blade with welding.
- Another advantage of the pin system is that it is easy to mount with an i tool without the use of force.
- an objective of the present invention is to provide a system for fixing wear elements in earth-moving machines that is easy to manipulate and that improves / secures the contacts between tooth and adapter.
- the system for fixing wear elements in earth-moving machines comprises a stem that rotates between a locking position and a release position, said stem defining an inner end and an outer end, said stem comprising some locking elements, wherein said rod comprises a first deformable locking element positioned at the inner end of said rod and a second locking element arranged offset towards the outer end of said rod.
- said first locking element has a polygonal profile and said second locking element is a projection or pin perpendicular to the longitudinal axis of said stem, preferably in one piece with the stem.
- the fixing system according to the present invention may also comprise a third locking element.
- said third locking element can be a deformable projection positioned between the first and second locking elements.
- said stem comprises a cavity at its outer end to place a tool inside it, such as a wrench or the like.
- said cavity has a polygonal profile, for example square.
- the fixing system according to the present invention also comprises an outer body provided with a through hole for said stem, said locking elements projecting from said outer body.
- said third locking element is preferably housed inside a housing, for example a through hole, of said outer body.
- said outer body advantageously comprises a bearing surface, for example, formed by a lower recess in said outer body.
- This support surface is supported by a turning support located in the tooth holder cavity, and serves as a fulcrum for locking and unlocking rotation of the pin system.
- the stem of the system for fixing wear elements in earthmoving machines according to the present invention comprises a cam-shaped groove which, in one position, pushes the third locking element.
- first blocking element can comprise a tip, which advantageously comprises a greater thickness in its front part and is beveled
- second blocking element can comprise a ramp in the area of connection with the stem, which facilitate the compensation of tolerances.
- Figure 1 is a perspective view of a tooth and tooth holder assembly where the fixing system according to the present invention is used, according to a first embodiment
- Figure 2 is a perspective view of the attachment system of the present invention, according to said first embodiment
- Figures 3 and 4 are cross-sectional views of the fixing system of the present invention, according to said first embodiment, in its locking and releasing position, respectively;
- Figure 5 is a perspective view of a tooth and tooth holder assembly where the fixing system according to the present invention is used, according to a second embodiment
- Figure 6 is a perspective view of the fixing system of the present invention according to a third embodiment, in which the stem comprises a slot;
- Figures 6 and 7 are sectional views of the fixing system of the present invention according to said third embodiment, in two different positions, in which the operation of the cam or slot is seen;
- Figure 9 is a front view of the fixing system of the present invention according to a fourth embodiment, in which the second blocking element comprises a ramp in the area of connection with the stem to compensate for tolerances;
- Figure 10 is a detail of Figure 9 to observe said ramp in greater detail.
- Figure 11 is a sectional view of the fixing system of the present invention according to a fourth embodiment.
- the fixing system according to the present invention can be used for fixing any wear element of an earthmoving machine.
- the fixing system according to the present invention is used to fix a tooth 10 to a tooth holder 1 1.
- the tooth 10 comprises a through hole 12 and the tooth holder 11 comprises a cavity 13.
- the fixing system comprises a stem 1 that defines an inner end and an outer end, the inner end being the one that is inserted into the through hole 12 and in cavity 13.
- the rod 1 comprises a first locking element 2 at its inner end, a second locking element 3 displaced towards the outer end, that is, closer to the outer end than to the inner end or at the end itself outer end, and a third locking element 4 (which is the one that gives tension to the pin), placing between the first and second locking elements 2, 3, on one side of said rod 1.
- the first element lock 2 has an over thickness, which also gives tension to the pin, but in the longitudinal direction of the stem.
- Said first locking element 2 is made of a deformable material, such as an elastic material, for example rubber, and has a polygonal profile, for example, substantially square with its corners rounded.
- the second locking element 3 is preferably a protrusion or pin formed in one piece with the stem 1 and extending perpendicular to the longitudinal axis of the stem 1.
- the function of the second locking element 3 is to abut with the tooth so that the pin does not slide out of the through hole of the tooth.
- the function of the first locking element 2 is to fix the position of the pin, or in an assembled position or a disassembled position, that is, to prevent rotation.
- the third locking element 4 is also made of a deformable material, for example also made of elastic material, such as rubber. It should be noted that it can also be a combination of elastic material and hard or rigid material, such as, for For example, steel, since that gives them more strength.
- this third locking element 4 is to abut against the tooth holder, which as it is elastically loaded, and the tooth holder is fixed, this retainer tends to go backwards from the assembly, pushing, at the same time, the tooth.
- the effect is the tensioning of the tooth on the adapter.
- the mixture of elastic material and hard material gives us more force to the retainer to push the tooth towards the tooth holder.
- the fixing system according to the present invention also comprises, according to this embodiment, an outer body 6 provided with a through hole 7 through which the stem 1 passes and with a housing 8 for the third locking element 4.
- said locking elements 2, 3, 4 protrude with respect to said outer body 6.
- the housing 8 is a through hole, whereby the third locking element 4 contacts the stem 1.
- said body 6 is provided with a support surface 14, which is supported by a rotation support 15 located in the cavity 13 of the tooth holder 11. This support serves as a support point for the rotation of the locking and unlocking system. Barrette.
- said bearing surface 14 is formed by a lower recess in said outer body 6.
- Said rod 1 is rotatable between a locking position and a releasing position (respectively represented in section in Figures 3 and 4).
- the stem 1 comprises, at its outer end, a cavity 5, preferably with a polygonal profile, for the introduction of a complementary tool, for example, a wrench.
- said tool For placement and removal, said tool is placed in cavity 5, the The pin is inserted into the cavity 13 of the tooth holder, passing through the through hole 12 of the tooth, and the support area 14 of the body 6 of the pin rests on the rotation support 15, and is rotated about 35 °, and then the stem 1 is rotated 90 ° with respect to its longitudinal axis by means of said tool, passing from the release position to the locking position. Once in its locked position, the tool is removed. There are two movements with the tool.
- the first locking element 2 is deformed against the cavity 13 of the tooth holder 11, compressing at its corners, until, after the 90 ° rotation, the corners regain their shape as they have reached the corners of the cavity 13, the first locking element being locked in cavity 13, and blocking the movement of the stem 1 and preventing the rotation of the pin.
- the geometry of the cavity 13 where the first locking element 2 is located has the same geometry as this, that is, it is not round, so that when it is rotated 90 °, the first locking element 2 rotates by deforming its corners according to the cavity 13, when the corners of the locking element 2 reach the next corners of the cavity 13, the corners of the locking element 2 are no longer compressed and are trapped in the cavity 13, being blocked.
- the second locking element 3 abuts against a groove formed in said through hole 12 of the tooth, blocking the stem 1 in the longitudinal direction, that is, it prevents it from coming out of the through hole 12. This causes that, During operation, unwanted vibrations and shocks do not tend to push the pin out of its mounting position.
- the third locking element 4 performs a friction or mechanical locking between the third locking element and the interior walls of the cavity 13 of the tooth holder 11 and the interior walls of the through hole 12 of the tooth 10, which make the pin system is tensioned in position, avoiding unwanted movements during work.
- This third locking element 4 presses on the stem 1, also making it difficult to rotate, and at the same time making it difficult to rotate the second locking element 3.
- a second embodiment of the fixing system according to the present invention is represented in figure 5.
- the fixing system also comprises a stem 1 provided with a first locking element 2 and a second locking element 3, but it does not comprise the third locking element or the outer body.
- FIGS 6 to 8 a third embodiment of the fixing system according to the present invention is shown.
- the main difference of this third embodiment from the first embodiment is that the stem 1 comprises a cam-shaped groove 16.
- the first locking element 2 which is preferably made of a deformable material, comprises a beveled tip 18 to better compact and exert more force, facilitating the absorption of tolerances.
- Said tip 18 also comprises a greater thickness in its front part, as can be seen in figure 11.
- the bevelling of the tip 18 allows that, if the elastic material is compressed, there is room for the deformed material, but it is also important that when the stem is in the mounting position, the elastic material is compressed in the longitudinal direction of the stem 1, so that the stem 1 is pushed into the groove of the tooth.
- the length of the first locking element gives a total length to the stem 1 longer than the distance between the retention / contact of the second locking element 3 with the tooth and the internal face of the cavity 13.
- the length of the first locking element 2 is greater than the depth of the cavity 13, although it is not essential.
- the first locking element 2 is taut by this greater thickness of the front part of the tip 18 of the first retaining element 2.
- the second blocking element 3 comprises a ramp 17 in the area of connection with the stem 1, as best seen in Figure 10.
- This ramp 17 takes advantage of the force exerted by the first locking element 2 to extract the tooth and bring a hole in the tooth closer to the second locking element 3.
- the preferable incline for this ramp is 3 to 25 degrees, more specifically 5 to 10 degrees. Being a point contact with the ramp 17, and under the pressure exerted against the tooth, the tooth tends to twist until it rests flat or touches the part of the hole against the second locking element 3, better absorbing manufacturing tolerances.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Component Parts Of Construction Machinery (AREA)
- Earth Drilling (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
- Crushing And Pulverization Processes (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
Description
Claims
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202080031985.8A CN113795638A (zh) | 2019-03-01 | 2020-03-02 | 用于固定土方机械上的耐磨元件的系统 |
MX2021010575A MX2021010575A (es) | 2019-03-01 | 2020-03-02 | Sistema de fijacion de elementos de desgaste en maquinas de movimiento de tierras. |
BR112021017102A BR112021017102A2 (pt) | 2019-03-01 | 2020-03-02 | Sistema de fixação de elementos de desgaste em máquinas de movimentação de terras |
AU2020231829A AU2020231829B2 (en) | 2019-03-01 | 2020-03-02 | System for attaching wear elements to earthmoving machines |
CA3131444A CA3131444A1 (en) | 2019-03-01 | 2020-03-02 | System for fixing wear elements to earth-moving machines |
KR1020217031406A KR20210140733A (ko) | 2019-03-01 | 2020-03-02 | 토공기계의 마모 요소 고정 시스템 |
PE2021001412A PE20220105A1 (es) | 2019-03-01 | 2020-03-02 | Sistema de fijacion de elementos de desgaste en maquinas de movimiento de tierras |
US17/435,378 US20220145594A1 (en) | 2019-03-01 | 2020-03-02 | System for fixing wear elements on earth-moving machines |
EP20766526.6A EP3933124A4 (en) | 2019-03-01 | 2020-03-02 | SYSTEM FOR FASTENING WEAR ELEMENTS ON EARTH-MOVING MACHINES |
ZA2021/06303A ZA202106303B (en) | 2019-03-01 | 2021-08-30 | System for fixing wear elements on earth-moving machines |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/ES2019/070125 WO2020178462A1 (es) | 2019-03-01 | 2019-03-01 | Sistema de fijación de elementos de desgaste en máquinas de movimiento de tierras |
ESPCT/ES2019/070125 | 2019-03-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2020178466A1 true WO2020178466A1 (es) | 2020-09-10 |
Family
ID=66542277
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/ES2019/070125 WO2020178462A1 (es) | 2019-03-01 | 2019-03-01 | Sistema de fijación de elementos de desgaste en máquinas de movimiento de tierras |
PCT/ES2020/070149 WO2020178466A1 (es) | 2019-03-01 | 2020-03-02 | Sistema de fijación de elementos de desgaste en máquinas de movimiento de tierras |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/ES2019/070125 WO2020178462A1 (es) | 2019-03-01 | 2019-03-01 | Sistema de fijación de elementos de desgaste en máquinas de movimiento de tierras |
Country Status (12)
Country | Link |
---|---|
US (1) | US20220145594A1 (es) |
EP (1) | EP3933124A4 (es) |
KR (1) | KR20210140733A (es) |
CN (1) | CN113795638A (es) |
AU (1) | AU2020231829B2 (es) |
BR (1) | BR112021017102A2 (es) |
CA (1) | CA3131444A1 (es) |
CL (1) | CL2021002280A1 (es) |
MX (1) | MX2021010575A (es) |
PE (1) | PE20220105A1 (es) |
WO (2) | WO2020178462A1 (es) |
ZA (1) | ZA202106303B (es) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2024011025A1 (en) * | 2022-07-08 | 2024-01-11 | Caterpillar Inc. | Tip and adapter coupling system |
WO2024011072A1 (en) * | 2022-07-08 | 2024-01-11 | Caterpillar Inc. | Lock assembly for a tip and adapter |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE33042E (en) * | 1986-12-04 | 1989-09-05 | Esco Corporation | Excavating tooth assembly |
US5983534A (en) * | 1997-09-17 | 1999-11-16 | G. H. Hensley Industries, Inc. | Rotary lock system for excavating tooth/adapter assembly |
US20080209772A1 (en) * | 2007-03-02 | 2008-09-04 | Kan Cui | Connector pin assembly |
ES2358627T3 (es) * | 2002-09-19 | 2011-05-12 | Esco Corporation | Conjunto de desgaste y sistema de bloqueo para pala excavadora. |
US8122621B2 (en) | 2006-03-30 | 2012-02-28 | Esco Corporation | Wear assembly |
US20150027009A1 (en) * | 2013-07-23 | 2015-01-29 | Caterpillar Inc. | Tool retention system having cam-driven keys |
US20170096799A1 (en) * | 2015-10-06 | 2017-04-06 | Hensley Industries, Inc. | Excavating Tooth Assembly With Locking Pin Assembly |
ES2628493T3 (es) * | 2003-08-04 | 2017-08-03 | Hensley Industries, Inc. | Conjunto de espiga de conexión para conjuntos adaptadores de dientes |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6708431B2 (en) * | 2001-12-03 | 2004-03-23 | Hensley Industries, Inc. | Excavating tooth assembly with rotatable connector pin structure |
US6757995B2 (en) * | 2002-07-12 | 2004-07-06 | Trn Business Trust | System and method for coupling excavation equipment components |
KR101052162B1 (ko) * | 2003-12-05 | 2011-07-26 | 메탈로제니아, 에스.에이. | 흙이나 돌과 같은 물질을 이동시키는 장치에 사용가능한굴삭조립체 및 그 부품들 |
US7603799B2 (en) * | 2006-05-11 | 2009-10-20 | Hensley Industries, Inc. | Cammed connector pin assembly and associated excavation apparatus |
DE202011101484U1 (de) * | 2011-06-06 | 2011-11-10 | Jung-Ching Ko | Löffelzahn für Baumaschine |
UA108940C2 (uk) * | 2011-07-05 | 2015-06-25 | Утримуючий пристрій, утримуюча система між охоплюючим компонентом і охоплюваним компонентом, охоплюючий компонент і охоплюваний компонент для екскаваторів і їм подібних машин | |
LT2783052T (lt) * | 2011-11-23 | 2021-03-25 | Esco Group Llc | Nusidėvėjimo konstrukcija |
FR3011013B1 (fr) * | 2013-09-20 | 2015-10-30 | Safe Metal | Systeme mecanique comprenant un dispositif de liaison entre une piece d'usure et son support, et godet d'engin de travaux publics |
AU2015279586B2 (en) * | 2014-06-27 | 2019-07-11 | CR Mining Equipment (USA) LLC | Self-locking connector pin for demountably securing consumable ground digging components to containers of earth moving equipment |
US10106960B2 (en) * | 2015-11-25 | 2018-10-23 | Caterpillar Inc. | Lock assembly for ground engaging tool |
US11492784B2 (en) * | 2019-04-15 | 2022-11-08 | Hensley Industries, Inc. | Position-biased locking pin assembly for a ground engaging wear member |
-
2019
- 2019-03-01 WO PCT/ES2019/070125 patent/WO2020178462A1/es active Application Filing
-
2020
- 2020-03-02 MX MX2021010575A patent/MX2021010575A/es unknown
- 2020-03-02 AU AU2020231829A patent/AU2020231829B2/en active Active
- 2020-03-02 WO PCT/ES2020/070149 patent/WO2020178466A1/es active Application Filing
- 2020-03-02 EP EP20766526.6A patent/EP3933124A4/en active Pending
- 2020-03-02 KR KR1020217031406A patent/KR20210140733A/ko unknown
- 2020-03-02 BR BR112021017102A patent/BR112021017102A2/pt unknown
- 2020-03-02 US US17/435,378 patent/US20220145594A1/en active Pending
- 2020-03-02 PE PE2021001412A patent/PE20220105A1/es unknown
- 2020-03-02 CN CN202080031985.8A patent/CN113795638A/zh active Pending
- 2020-03-02 CA CA3131444A patent/CA3131444A1/en active Pending
-
2021
- 2021-08-30 ZA ZA2021/06303A patent/ZA202106303B/en unknown
- 2021-08-31 CL CL2021002280A patent/CL2021002280A1/es unknown
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE33042E (en) * | 1986-12-04 | 1989-09-05 | Esco Corporation | Excavating tooth assembly |
US5983534A (en) * | 1997-09-17 | 1999-11-16 | G. H. Hensley Industries, Inc. | Rotary lock system for excavating tooth/adapter assembly |
ES2358627T3 (es) * | 2002-09-19 | 2011-05-12 | Esco Corporation | Conjunto de desgaste y sistema de bloqueo para pala excavadora. |
ES2628493T3 (es) * | 2003-08-04 | 2017-08-03 | Hensley Industries, Inc. | Conjunto de espiga de conexión para conjuntos adaptadores de dientes |
US8122621B2 (en) | 2006-03-30 | 2012-02-28 | Esco Corporation | Wear assembly |
US9493930B2 (en) | 2006-03-30 | 2016-11-15 | Esco Corporation | Lock for securing a wear assembly to excavating equipment |
US20080209772A1 (en) * | 2007-03-02 | 2008-09-04 | Kan Cui | Connector pin assembly |
US20150027009A1 (en) * | 2013-07-23 | 2015-01-29 | Caterpillar Inc. | Tool retention system having cam-driven keys |
US20170096799A1 (en) * | 2015-10-06 | 2017-04-06 | Hensley Industries, Inc. | Excavating Tooth Assembly With Locking Pin Assembly |
Non-Patent Citations (1)
Title |
---|
See also references of EP3933124A4 |
Also Published As
Publication number | Publication date |
---|---|
EP3933124A1 (en) | 2022-01-05 |
AU2020231829A1 (en) | 2021-09-30 |
WO2020178462A1 (es) | 2020-09-10 |
CA3131444A1 (en) | 2020-09-10 |
BR112021017102A2 (pt) | 2021-11-03 |
PE20220105A1 (es) | 2022-01-26 |
MX2021010575A (es) | 2021-10-13 |
CN113795638A (zh) | 2021-12-14 |
EP3933124A4 (en) | 2023-01-18 |
KR20210140733A (ko) | 2021-11-23 |
ZA202106303B (en) | 2022-09-28 |
AU2020231829B2 (en) | 2023-05-11 |
CL2021002280A1 (es) | 2022-04-01 |
US20220145594A1 (en) | 2022-05-12 |
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