Gage scraper |
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| 申请号 | US3674314D | 申请日 | 1970-01-07 | 公开(公告)号 | US3674314A | 公开(公告)日 | 1972-07-04 |
| 申请人 | JARVA INC; | 发明人 | SCARAVILLI JOSEPH V; | ||||
| 摘要 | A tunneling machine is disclosed which includes a support frame, a rotatable cutter head, and inside roller cutters and gage roller cutters for cutting or crushing the end face of a tunnel. Each gage cutter is provided with a gage scraper which includes a first scraper portion for engaging the tunnel end face and a second scraper portion for engaging the cylindrical tunnel wall to clear protruding formation particles from the path of the gage cutter. A resilient mounting means resiliently biases the first and second scraper portions against their respective tunnel surfaces to provide substantially continuous contact therewith as the scraper portions become worn, and to permit retraction of the scraper portions if they encounter a formation particle which they cannot remove. A guide plate prevents movement of the resiliently mounted scraper portions toward the gage cutters in the direction of travel of the gage cutters around the tunnel end face to permit mounting the scraper portions on gage saddles immediately adjacent the gage cutters. Intersecting edge portions of the guide plate form fixed scrapers for further protection of the gage cutters. | ||||||
| 权利要求 | 1. A tunneling machine comprising a rotatable cutter head, a roller cutter mounted on said cutter head for engaging an end face of a tunnel with rolling contact, a scraper leading said roller cutter and including a scraper portion for engaging a surface of said tunnel for clearing materials from the path of said roller cutter, a mounting means mounting said scraper relative to said rotatable cutter head, said mounting means including resilient means for permitting movement of said scraper portion relative to said cutter head radially and axially away from said tunnel surface against the bias of said resilient means. 2. A tunneling machine as set fortH in claim 1 wherein the plane of movement of said scraper portion relative to said cutter head is substantially parallel to the longitudinal axis of said tunnel. 3. A tunneling machine as set forth in claim 1 wherein said mounting means includes means for limiting movement of said scraper portion relative to said cutter head toward said roller cutter in the direction of travel of said roller cutter around said tunnel end face. 4. A tunneling machine as set forth in claim 3 wherein said means for limiting movement includes a guide surface, said scraper portion is slidably mounted on said guide surface, and said guide surface defines the plane of movement of said scraper portion and prevents movement of said scraper portion relative to said cutter head toward said roller cutter in the direction of travel of said roller cutter around said tunnel end face. 5. A tunneling machine as set forth in claim 4 including a saddle secured to said cutter head carrying said roller cutter, and said mounting means mounts said scraper portion directly on said saddle. 6. A tunneling machine as set forth in claim 5 wherein said guide surface is one surface of a mounting plate which is connected to the leading side of said saddle, and said resilient means includes a spring operating between said mounting plate and said scraper portion. 7. A tunneling machine as set forth in claim 1 wherein said tunnel surface is a tunnel end face, said scraper portion is normally biased by said resilient means to a first axially advanced position, and said resilient means permits movement of said scraper portion to a second position axially rearward of said axially advanced position when said roller cutter is forced against said tunnel end face by said cutter head. 8. A tunneling machine as set forth in claim 1 wherein said tunnel surface is a tunnel wall, said scraper portion is normally biased by said resilient means to a first radially outward position, and said resilient means permits movement of said scraper portion to a second position radially inward of said radially outward position when said roller cutter is forced against said tunnel end face by said cutter head. 9. A tunneling machine comprising a rotatable cutter head, a roller cutter carried within a saddle mounted on said cutter head for engaging an end face of a tunnel with rolling contact, a scraper leading said roller cutter and including a scraper portion for engaging a surface of said tunnel for clearing materials from the path of said roller cutter, a mounting means mounting said scraper directly on said saddle, said mounting means including a mounting plate having a guide surface which defines the plane of movement of said scraper portion and resilient means for permitting movement of said scraper portion relative to said cutter head away from said tunnel surface against the bias of said resilient means, said resilient means comprising a leaf spring having a generally U-shaped portion, one end of said U-shaped portion being operably connected to said scraper portion, and the other end of said U-shaped portion being operably connected to said mounting plate. 10. A tunneling machine comprising a rotatable cutter head, a roller cutter mounted on said cutter head for engaging an end face of a tunnel with rolling contact, a scraper leading said roller cutter, and a mounting means mounting said scraper relative to said rotatable cutter head, said scraper including a first scraper portion for engaging said tunnel end face for clearing materials from the path of said roller cutter and a second scraper portion for engaging a tunnel wall of said tunnel for clearing materials from the path of said roller cutter, said mounting means includes resilient means, said resilient means normally biases said first scraper portion to axially forward position and said second scraper portion to a radially outward position, and said resilient means permits movement of said first scraper portion away from said tunnel end face to a position axially rearward of said axially advanced position and movement of said scraper portion away from said tunnel wall to a position radially inward of said radially outward position. 11. A tunneling machine as set forth in claim 10 wherein the plane of movement of said first and second scraper portions relative to said cutter head is substantially parallel to the longitudinal axis of said tunnel. 12. A tunneling machine as set forth in claim 10 wherein said first and second scraper portions are intersecting edge portions of a scraper plate member. 13. A tunneling machine as set forth in claim 10 wherein said mounting means includes means for limiting movement of said first and second scraper portions relative to said cutter head toward said roller cutter in the direction of travel of said roller cutter around said tunnel end face. 14. A tunneling machine as set forth in claim 13 wherein said means for limiting movement includes a guide surface, said first and second scraper portions are slidably mounted on said guide surface, and said guide surface defines the plane of movement of said first and second scraper portions and prevents movement of said first and second scraper portions relative to said cutter head toward said roller cutter in the direction of travel of said roller cutter around said tunnel end face. 15. A tunneling machine as set forth in claim 14 including a saddle secured to said cutter head carrying said roller cutter, and said mounting means mounts said first and second scraper portions directly on said saddle. 16. A tunneling machine as set forth in claim 15 wherein said guide surface is one surface of a mounting plate which is connected to the leading side of said saddle, and said resilient means includes a spring operating between said mounting plate and said first and second scraper portions. 17. A tunneling machine as set forth in claim 16 wherein said spring is a leaf spring having a generally U-shaped portion, one end of said U-shaped portion is operably connected to said first and second scraper portions, and the other end of said U-shaped portion is operably connected to said mounting plate. |
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