A system (1) for working hard and abrasive surfaces is provided. The system has a support and containment structure (3) equipped with a containment hole (5), and a spindle (7) to be inserted in the containment hole (5). The spindle is elongated and has a conical section with a first diameter (A) oriented towards the outside of the structure (1) and a second diameter (B) greater than the first diameter (A) and oriented towards the inside of the structure (1) and a conical section with a third diameter (A′) oriented towards the outside of the structure (1) and a fourth diameter (B′) greater than the first diameter (A′) and oriented towards the inside the structure (1). the spindle (7) is inserted into the containment hole (5) by raising or reducing the temperature of the support and containment structure (3).
B28D 1/18 - Working stone or stone-like materials, e.g. brick, concrete, not provided for elsewhereMachines, devices, tools therefor by milling, e.g. channelling by means of milling tools
B23P 11/02 - Connecting or disconnecting metal parts or objects by metal-working techniques, not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluidsConnecting or disconnecting metal parts or objects by metal-working techniques, not otherwise provided for by making force fits
2.
Gearbox with gears with conical coaxial front toothed wheels
A gearbox (10) is provided and includes a driving wheel (4) and a driven wheel (3) rotating on a common axis (13) and a cursor (9) arranged transversally to the axis (13) and sliding with respect to it. The wheels (4, 3) have crown gears (5A, 5B) arranged on different diameters of the drive (4) and driven wheels (3). The crown gears (5A, 5B) have teeth protruding from facing surfaces (21, 22) of the wheels (4, 3). The cursor (9) has two gears (7A, 7B) arranged at its ends, rotating around the axis (19) of the cursor (9) and configured to transmit motion from the driving wheel (4) to the driven wheel (3), engaging each gear (7A, 7B) in respective crown gears (5A, 5B) of the driving wheels (4) and driven wheels (3). The cursor (9) slides inside a seat (15) made in the axis (13).
F16H 3/00 - Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
F16H 3/36 - Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with a single gear meshable with any of a set of coaxial gears of different diameters
F16H 61/26 - Generation or transmission of movements for final actuating mechanisms
A gearbox (10) with gears is described, comprising a driving wheel (4) and a driven wheel (3) rotating on a common axis (13) and a cursor (9) arranged transversally to the axis (13) and sliding with respect to it, the wheels (4, 3) comprising respective crown gears (5A, 5B) arranged on different diameters of the drive (4) and driven wheels (3), the crown gears (5A, 5B) being made with teeth protruding from facing surfaces (21, 22) of the wheels (4, 3), wherein the cursor (9) further comprises two gears (7A, 7B) arranged at its ends, rotating around the axis (19) of the cursor (9) and configured to transmit motion from the driving wheel (4) to the driven wheel (3), engaging each gear (7A, 7B) in respective crown gears (5A, 5B) arranged on different diameters of 20 the driving wheels (4) and driven wheels (3); the cursor (9) slides inside a seat (15) made in the axis (13).
F16H 3/36 - Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with a single gear meshable with any of a set of coaxial gears of different diameters
4.
SYSTEM EQUIPPED WITH INSERT FOR WORKING ON HARD AND ABRASIVE SURFACES
A system (1) for working hard and abrasive surfaces is described, comprising: a support and containment structure (3) equipped with a containment hole (5); and a spindle (7) to be inserted in the containment hole (5), which is elongated and has a conical section with a first diameter (A) oriented towards the outside of the structure (1) and a second diameter (B) greater than the first diameter (A) and oriented towards the inside of the structure (1); the spindle (7) is elongated and has a conical section with a third diameter (A') oriented towards the outside of the structure (1) and a fourth diameter (B') greater than the first diameter (A') and oriented towards the inside the structure (1); the spindle (7) is inserted into the containment hole (5) by raising or reducing the temperature of the support and containment structure (3).
B23D 65/00 - Making tools for sawing machines or sawing devices for use in cutting any kind of material
B28D 1/18 - Working stone or stone-like materials, e.g. brick, concrete, not provided for elsewhereMachines, devices, tools therefor by milling, e.g. channelling by means of milling tools
B23Q 1/00 - Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
B23P 11/02 - Connecting or disconnecting metal parts or objects by metal-working techniques, not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluidsConnecting or disconnecting metal parts or objects by metal-working techniques, not otherwise provided for by making force fits
A percussion tool (1) is described, for a demolishing hammer for perforations, demolitions or excavations, comprising an elongated body having: a first portion (3) aimed to be connected with the demolishing hammer and made of a first material; and a second portion (5), opposite to the first portion (3), which includes a working end (7) and is made of a second material different from the first material; such first and second portions (3, 5) are adapted to mutually make a coupling of the male-female type; each of the first and the second portions (3, 5) is shaped, in its respective end (9, 11) adapted to make, such male-female coupling, with a cross section whose shape is at least triangular; and the tool (1) is equipped with transverse holding means (14) for the first and the second portions (3, 5).
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