Automatic assembling device for needle roller bearing

The utility model discloses an automatic assembling device for a needle roller bearing; the automatic assembling device comprises an automatic material loading mechanism, an automatic grease injection mechanism, an automatic needle loading mechanism and an automatic needle roller detecting mechanism, wherein a turntable I connected with a motor I is arranged on a bracket of a stand; a guardrail and a material outlet passage are arranged on the periphery of the stand; the guardrail is provided with a cross rod; a guide plate is connected below the cross rod; the automatic grease injection mechanism comprises a material conveying passage, a material pushing cylinder I, a locating cylinder I and a grease injection passage; a clamping and locating seat is arranged in front of the locating cylinder I; the automatic needle loading mechanism is provided with a conveying belt device; a material pushing cylinder II is connected below a locating bottom plate; a locating cylinder II connected with a locating block is arranged above the locating bottom plate; a fixing block is mounted on the locating cylinder II; a needle roller guide block, a needle loading plate and an upper end cover are arranged above the locating block in sequence; a needle hole is formed in the upper end cover; a central shaft is arranged at the central part of the upper end cover; the upper end of the central shaft is connected with a turntable II connected with a motor II; the automatic needle roller detecting mechanism comprises a detecting cylinder connected outside the needle locating plate and provided with a probe at the head part of a small bracket; a detecting hole is formed in the needle roller guide block; and a displacement sensor is arranged on the cylinder side. As materials are automatically loaded, greases are automatically injected and needles are automatically loaded, the automatic assembling device for the needle roller bearing, disclosed by the utility model, has the advantages of high automation and stable quality.