A cab assembly used in cabs of heavy commercial vehicles and provides to dampen a portion of the energy generated when the cab is exposed to an impact, comprising basically; - the cab and at least one chassis supporting the main structure, - at least one cab stabilizer rod keeping the tilting angle of the cab at a minimum value during turning a bend of the vehicle, - at least one suspension, which absorbs the vibrations induced by the road without transmitting them to cab, - a tower bracket linked at its one side to the chassis and to the cab stabilizer rod related with the suspension at its other side, which dampens the movement of the cab stabilizer rod and the force exerted through it, when a sudden force is applied to the cab from any direction and on which at least one rounded first slot (5.2.1.1), at least one rounded second slot (5.2.1.2) and at least one channel (5.2.1.3) is opened, - wherein the second slot (5.2.1.2) is linked to the first slot (5.2.1.1) by the channel (5.2.1.3) which has a smaller size than the diameter of the first slot (5.2.1.1), - wherein the tower bracket, that has a lower connection region (5.2) comprising a first connection area (5.2.1) on the side which is closer to the suspension and a second connection area (5.2.2) on the side, which is more distal to the suspension, and characterized by • wherein the first connection area (5.2.1) which has the first slot (5.2.1.1), the second slot (5.2.1.2) and the channel (5.2.1.3) arranged between the first slot (5.2.1.1) and the second slot (5.2.1.2) and size of which is smaller than the diameter of the first slot (5.2.1.1) and the second slot (5.2.1.2), • the first slot (5.2.1.1) on that side which is close to the chassis relative to the cab stabilizer rod, and wherein the angle between the line formed by the axis passing through the center point of it and by the axis passing through the center point of second slot (5.2.1.2) and the ground plane is seventy degrees, • wherein the second slot (5.2.1.2) has the same size as the first slot (5.2.1.1), • the channel (5.2.1.3) which exerts a force against the direction of movement of a connecting element due to its size during movement of the connecting element from the first slot (5.2.1.1) to the second slot (5.2.1.2) when a force is exerted by cab stabilizer on the tower bracket and thereby enforcing the passage of the connecting element and absorbing the impact energy partially. - the cab and at least one chassis supporting the main structure, - at least one cab stabilizer rod keeping the tilting angle of the cab at a minimum value during turning a bend of the vehicle, - at least one suspension, which absorbs the vibrations induced by the road without transmitting them to cab, - a tower bracket linked at its one side to the chassis and to the cab stabilizer rod related with the suspension at its other side, which dampens the movement of the cab stabilizer rod and the force exerted through it, when a sudden force is applied to the cab from any direction and on which at least one rounded first slot (5.2.1.1), at least one rounded second slot (5.2.1.2) and at least one channel (5.2.1.3) is opened, - wherein the second slot (5.2.1.2) is linked to the first slot (5.2.1.1) by the channel (5.2.1.3) which has a smaller size than the diameter of the first slot (5.2.1.1), - wherein the tower bracket, that has a lower connection region (5.2) comprising a first connection area (5.2.1) on the side which is closer to the suspension and a second connection area (5.2.2) on the side, which is more distal to the suspension, • wherein the first connection area (5.2.1) which has the first slot (5.2.1.1), the second slot (5.2.1.2) and the channel (5.2.1.3) arranged between the first slot (5.2.1.1) and the second slot (5.2.1.2) and size of which is smaller than the diameter of the first slot (5.2.1.1) and the second slot (5.2.1.2), • the first slot (5.2.1.1) on that side which is close to the chassis relative to the cab stabilizer rod, and wherein the angle between the line formed by the axis passing through the center point of it and by the axis passing through the center point of second slot (5.2.1.2) and the ground plane is seventy degrees, • wherein the second slot (5.2.1.2) has the same size as the first slot (5.2.1.1), • the channel (5.2.1.3) which exerts a force against the direction of movement of a connecting element due to its size during movement of the connecting element from the first slot (5.2.1.1) to the second slot (5.2.1.2) when a force is exerted by cab stabilizer on the tower bracket and thereby enforcing the passage of the connecting element and absorbing the impact energy partially.