Cutting height adjustment for lawn mower

A lawn mower (1), comprising:

• a front mounted mower deck (5) comprising at least one cutting knife, wherein the cutting knife is rotatably arranged in a substantially horizontal plane (10),
• a wheel suspension arrangement (19) connected to the mower deck (5) at an end (78) via a first pivot connection (33),
• at least one wheel (17) to be in contact with the ground so as to support the mower deck (5) during mowing, wherein the wheel (17) is connected to the wheel suspension arrangement (19) by means of an axle (21) to be in perpendicular alignment with the ground during mowing, and
• a cutting height adjustment device (27) connected to the mower deck (5) via a second pivot connection (37) and adapted to move the wheel suspension arrangement (19) with respect to the mower deck (5) for adjusting the mutual height relationship between the wheel (17) and the mower deck (5), so as to adjust the distance between the plane (10) of the cutting knife and the ground, the wheel (17) and the axle (21) being connected to the mower deck (5) through the suspension arrangement (19) and the cutting height adjustment device (27), characterized in that the axle (21) is pivotal about an axis (35) with respect to the wheel suspension arrangement (19) and connected to the cutting height adjustment device (27) in such a way that the axle (21) is parallelly displaced when the wheel suspension arrangement (19) is moved,
• wherein the axis (35) is horizontal, the cutting height adjustment device (27) comprises an adjustment disk (27) which is connected to the mower deck (5) and which is provided with a first curved slot (39), wherein the axle (21) comprises a track rod (45) having a first pin (47) which is slidable along the first slot (39) for pivoting the axle (21) about the axis (35), when the suspension arrangement (19) is moved with respect to the mower deck (5) so as to parallelly displace the axle (21), and
• wherein the adjustment disk (27) is provided with a second curved slot (41), and the wheel suspension arrangement (19) comprises a second pin (51) which is slidable along the second slot (41) when the wheel suspension arrangement (19) is moved with respect to the mower deck (5), and which is second pin (51) is adapted to lock the adjustment disk (27) with respect to the wheel suspension arrangement (19) at positions along the second slot (41).