US 12,259,027 B2
Ball nut assembly and end component thereof
ChuanYu Lee, New Taipei (TW)
Filed by ChuanYu Lee, New Taipei (TW)
Filed on Jun. 8, 2023, as Appl. No. 18/331,522.
Claims priority of application No. 202222742378.1 (CN), filed on Oct. 18, 2022.
Prior Publication US 2024/0125376 A1, Apr. 18, 2024
Int. Cl. F16H 25/20 (2006.01); F16H 25/22 (2006.01); F16H 25/24 (2006.01)
CPC F16H 25/2214 (2013.01) [F16H 25/2418 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A ball nut assembly, comprising:
a nut body comprising an outer ring wall, an inner ring wall, a ball groove, an assembling groove, and a fixing hole, wherein the ball groove is annularly arranged on the inner ring wall; the reflow channel is axially defined through the nut body between the outer ring wall and the inner ring wall; the assembling groove is arranged on an end portion, and the assembling groove has a first side surface, a second side surface, a bottom surface, and an assembling groove wall; the first side surface and the second side surface are opposite to each other; the bottom surface is connected to the first side surface and the second side surface, and the fixing hole is on the bottom surface; the assembling groove wall is adjacent to the first side surface, the second side surface, and the bottom surface, and a surface of the assembling groove wall is flushed with a surface of the outer ring wall; and
an end component accommodated in the assembling groove of the nut body, wherein the end component comprises a first contact surface, a second contact surface, a radial surface, a fixing portion, and a reflow bend; the first contact surface is opposite to the second contact surface; the radial surface extends radially and is connected to the first contact surface and the second contact surface; the fixing portion is arranged on the radial surface; the reflow bend is arranged on the second contact surface, and is open towards the second side surface; the first contact surface contacts the first side surface of the assembling groove in a force-fit manner; the second contact surface contacts the second side surface of the assembling groove in the force-fit manner, two ends of the reflow bend respectively correspond to the ball groove and the reflow channel, and the fixing portion is fixed in the fixing hole;
wherein the end component further comprises an axial surface extending axially and connected to the first contact surface and the second contact surface, the first contact surface has a first fillet portion, and a second fillet portion is between the second contact surface and the axial surface;
wherein the nut body has an axial center, a line connecting the second fillet portion and the axial center forms a reference axis, and an angle between a virtual extension line of the second contact surface and the reference axis is between 40 and 50 degrees.