Plastic bearing for steering column

A plastic bearing for a steering column comprising:

• a housing,
• an inner race, and
• a middle race,
• wherein the middle race is sleeved outside the inner race;
• wherein a retainer and balls are arranged between the middle race and the inner race, and the balls are rotatably mounted on the retainer;
• wherein the housing, the inner race, and the middle race are made of plastic;
• wherein an accommodating cavity is in the housing;
• the middle race is arranged in the accommodating cavity;
• and a plurality of guide protrusions are arranged on an inner wall of the accommodating cavity;
• wherein two positioning protrusions are arranged on an outer wall of the middle race, and the two positioning protrusions correspond to two sides of each of the plurality of guide protrusions;
• wherein an insertion groove is between the two positioning protrusions;
• each of the plurality of guide protrusions is matched with the insertion groove in an insertion manner;
• wherein a plurality of buckles are arranged on the inner wall of the accommodating cavity;
• clamping blocks are arranged on the outer wall of the middle race, and the clamping blocks correspond to the plurality of buckles;
• and
• wherein the clamping blocks are clamped in the plurality of buckles to fix the housing and the middle race together.