Sled with push-pull mechanism and server including the same

A server device comprising:

• a chassis;
• and
• a sled configured to be pushed to and pulled from the chassis,
• the sled comprising:
• a sled housing having a first side wall that is parallel to a second side wall, a space being formed between the first side wall and the second side wall;
• and
• a push-pull mechanism including a first mechanism coupled to the first side wall and a second mechanism coupled to the second side wall, the push-pull mechanism being configured to facilitate pushing the sled into and pulling the sled from the chassis, the pushing resulting in a lead-in lock position and the pulling resulting in a lead-out lock position,
• wherein each of the first and second mechanisms includes:
• a compound gear train with at least three compound gears that are rotatable to result in a respective one of the lead-in lock position and the lead-out lock position;
• a short rack configured to mesh with one of the at least three compound gears, the short rack guiding movement of the sled between the lead-in lock position and the lead-out lock position;
• and
• a long rack configured to mesh with a different one of the at least three compound gears, the long rack guiding movement of the sled between the lead-in lock position and the lead-out lock position;
• wherein the short rack is fixed to a rail that is coupled to the chassis, the short rack being fixed in both the lead-in lock position and the lead-out lock position.

A sled for a server device, the sled comprising:

• a sled housing having a first side wall that is parallel to a second side wall, a space being formed between the first side wall and the second side wall;
• and
• a push-pull mechanism including a first mechanism coupled to the first side wall and a second mechanism coupled to the second side wall, the push-pull mechanism being configured to facilitate pushing the sled into and pulling the sled from a chassis of the server device, the pushing resulting in a lead-in lock position and the pulling resulting in a lead-out lock position,
• wherein each of the first and second mechanisms includes:
• a compound gear train with at least three compound gears that are rotatable to result in a respective one of the lead-in lock position and the lead-out lock position;
• a short rack configured to mesh with one of the at least three compound gears, the short rack guiding movement of the sled between the lead-in lock position and the lead-out lock position;
• and
• a long rack configured to mesh with a different one of the at least three compound gears, the long rack guiding movement of the sled between the lead-in lock position and the lead-out lock position;
• wherein the at least three compound gears include:
• a first compound gear having a first large gear and a first small gear;
• a second compound gear having a second large gear and a second small gear;
• and
• a third compound gear having a third large gear and a third small gear,
• wherein the first, second, and third compound gears are the same size;
• wherein the first small gear is configured to mesh with the short rack and the third large gear is configured to mesh with the long rack;
• and
• wherein:
• the first large gear meshes with the second small gear,
• the second large gear meshes with the third small gear, and
• the first, second, and third compound gears are spaced apart without interfering with each other.

A sled for a server device, the sled comprising:

• a sled housing having a first side wall that is parallel to a second side wall, a space being formed between the first side wall and the second side wall;
• and
• a push-pull mechanism including a first mechanism coupled to the first side wall and a second mechanism coupled to the second side wall, the push-pull mechanism being configured to facilitate pushing the sled into and pulling the sled from a chassis of the server device, the pushing resulting in a lead-in lock position and the pulling resulting in a lead-out lock position,
• wherein each of the first and second mechanisms includes:
• a compound gear train with at least three compound gears that are rotatable to result in a respective one of the lead-in lock position and the lead-out lock position;
• a short rack configured to mesh with one of the at least three compound gears, the short rack guiding movement of the sled between the lead-in lock position and the lead-out lock position;
• and
• a long rack configured to mesh with a different one of the at least three compound gears, the long rack guiding movement of the sled between the lead-in lock position and the lead-out lock position;
• wherein the at least three compound gears include:
• a first compound gear having a first large gear and a first small gear;
• a second compound gear having a second large gear and a second small gear;
• and
• a third compound gear having a third large gear and a third small gear,
• wherein the first, second, and third compound gears are the same size;
• wherein the first small gear is configured to mesh with the short rack and the third large gear is configured to mesh with the long rack;
• and
• wherein:
• each of the first, second, and third large gears has a number of large gear teeth that is twice a number of small gear teeth of each of the first, second, and third small gears,
• when the at least three compound gears rotate, a speed of the second compound gear being half of a speed of the third compound gear and a speed of the first compound gear being a quarter of the speed of the third compound gear, and
• when the third compound gear rotates counterclockwise, the second compound gear rotates clockwise and the first compound gear rotates counterclockwise.

A sled for a server device, the sled comprising:

• a sled housing having a first side wall that is parallel to a second side wall, a space being formed between the first side wall and the second side wall;
• and
• a push-pull mechanism including a first mechanism coupled to the first side wall and a second mechanism coupled to the second side wall, the push-pull mechanism being configured to facilitate pushing the sled into and pulling the sled from a chassis of the server device, the pushing resulting in a lead-in lock position and the pulling resulting in a lead-out lock position,
• wherein each of the first and second mechanisms includes:
• a compound gear train with at least three compound gears that are rotatable to result in a respective one of the lead-in lock position and the lead-out lock position;
• a short rack configured to mesh with one of the at least three compound gears, the short rack guiding movement of the sled between the lead-in lock position and the lead-out lock position;
• and
• a long rack configured to mesh with a different one of the at least three compound gears, the long rack guiding movement of the sled between the lead-in lock position and the lead-out lock position;
• wherein each of the first and second mechanisms further includes a bracket on which the long rack is fixed, the bracket being configured to slide under the at least three compound gears;
• wherein the bracket is coupled to a handle mechanism via a fastener, the handle mechanism including a handle;
• wherein:
• the handle mechanism further includes a first latch configured to fix the sled and the chassis in the lead-in lock position, and
• the handle is configured to unlock, being released from the sled housing and the chassis, in response to pressing a first latch button in the lead-in lock position such that the handle is pullable out of the sled housing and chassis into the lead-out lock position;
• and
• further comprising a stopper located on a floor of the sled, the stopper being configured to contact the bracket, preventing the handle from being pulled further when the short rack and the first small gear disengage, in response to pulling the handle.