| 摘要 |
A coupling device for coupling together a tool holder (3) with a rotatable spindle (2) of a machining machine. The coupling device comprises: —a female-shaped coupling part (10) with an internally cone-shaped section (11) and a male-shaped coupling part (20) with an externally cone-shaped section (21); —an annular groove (25) arranged in the externally cone-shaped section; —locking balls (15), which are radially displaceable in radial holes (16) in the internally cone-shaped section; and —a locking sleeve (30), which is arranged on the outside of the female-shaped coupling part and which is rotatable between a releasing position, in which the locking balls can be displaced radially to a retracted position while allowing a mutual axial displacement between the coupling parts, and a locking position, in which the locking balls are kept in engagement in said groove while preventing a mutual axial displacement between the coupling parts. The locking sleeve is provided with radially springing guide members (31), which co-operates with a respective locking ball. |
| 主权项 |
1. A coupling device for coupling together a tool holder (3) with a rotatable spindle (2) of a machining machine, which coupling device (4) comprises:
a female-shaped coupling part (10) and a corresponding male-shaped coupling part (20), the female-shaped coupling part (10) being fixedly connected to the spindle (2) and being provided with an internally cone-shaped section (11), whereas the male-shaped coupling part (20) is fixedly connected to the tool holder (3) and is provided with an externally cone-shaped section (21) which is configured for engagement with said internally cone-shaped section (11); an annular groove (25) arranged in the externally cone-shaped section (21), this groove (25) extending in one turn around this section (21); at least two locking balls (15), which are received in a respective radial through hole (16) in said internally cone-shaped section (11) while being radially displaceable in this hole, these holes (16) being distributed in the circumferential direction of this section (11) and arranged to be aligned with the groove (25) in the externally cone-shaped section (21) when the male-shaped coupling part (20) is inserted in the female-shaped coupling part (10) with the cone-shaped sections (11, 21) in engagement with each other; and a locking sleeve (30) which is rotatably arranged on the outside of the female-shaped coupling part (10) outwardly of the internally cone-shaped section (11) and the locking balls (15), the locking sleeve (30) being rotatable to and fro between a releasing position, in which the locking sleeve (30) allows the respective locking ball (15) to be displace radially to a retracted position while allowing a mutual axial displacement between said coupling parts (10, 20), and a locking position, in which the locking sleeve (30) forces the respective locking ball (15) to assume an advanced position with the locking ball (15) extending through the inwards facing opening of the associated hole (16) and down into the groove (25) in the externally cone-shaped section (21) while preventing a mutual axial displacement between said coupling parts (10, 20), wherein the locking sleeve (30) is provided with at least two separate radially springing guide members (31) separately mounted on the locking sleeve (30) from one another, and the respective guide member (31) co-operates with one of said locking balls (15) and is arranged to be rotated together with the locking sleeve (30) and be pressed against the associated locking ball (15) to lock this locking ball (15) in said advanced position when the locking sleeve (30) is rotated from said releasing position to said locking position. |
