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A powder metallurgy synchronizer gear hub

A technology of powder metallurgy and synchronizer, which is applied in the direction of clutches, components with teeth, mechanically driven clutches, etc., can solve the problems of debris generation, deflection, and crushing damage, etc., to achieve the elimination of debris, Avoid extrusion damage and improve service life

Active Publication Date: 2017-12-29
NINGBO SHANGZHONGXIA AUTOMATIC TRANSMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the internal spline of the synchronizer hub and the external spline of the drive shaft are prone to deflection and the teeth of the internal spline at the press-in end of the synchronizer hub exist when the existing synchronizer is assembled. In order to solve the problem that the thick side is easily damaged by extrusion cutting and generate debris, a powder metallurgy synchronizer hub is provided, which can ensure that it is automatically kept coaxial with the external spline of the transmission shaft when it is installed on the external spline of the transmission shaft, And it can effectively avoid the crushing and shearing damage of the tooth thickness side of the spline in the press-in end of the synchronizer gear hub, and at the same time, it can transmit power and torque smoothly

Method used

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  • A powder metallurgy synchronizer gear hub
  • A powder metallurgy synchronizer gear hub
  • A powder metallurgy synchronizer gear hub

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Example 1: Such as figure 1 As shown, a powder metallurgical synchronizer gear hub includes a gear hub body 1, on the outer side of the gear hub body 1, there is a gear hub external spline 2 that meshes with a connecting sleeve in the synchronizer, and on the inner side of the gear hub body there is a transmission The outer spline of the shaft engages with the inner spline 3 of the gear hub. When assembling the synchronizer, the synchronizer hub is coaxially sleeved on the drive shaft in a fixed direction and pressed into the external spline of the drive shaft. The synchronizer hub is first close to the drive shaft during assembly. One end of the outer spline becomes the press-in end. At this time, the inner spline 3 of the gear hub of the synchronizer hub forms a tight fit with the outer spline on the drive shaft, that is, the inner spline 3 of the gear hub and the drive shaft The external spline of the SR can not have a slight relative rotation in the circumferential d...

Embodiment 2

[0031] Example 2: Such as Figure 4 As shown, a powder metallurgical synchronizer gear hub includes a gear hub body 1, on the outer side of the gear hub body 1, there is a gear hub external spline 2 that meshes with a connecting sleeve in the synchronizer, and on the inner side of the gear hub body there is a transmission The outer spline of the shaft engages with the inner spline 3 of the gear hub. In order to enable the synchronizer hub to transmit power and torque to the transmission shaft smoothly and reliably, the hub internal spline 3 includes a guide section 31 close to the press-in end of the synchronizer hub and a positioning section 32 away from the press-in end of the synchronizer hub. The key teeth of the spline 3 in the gear hub are composed of transmission key teeth 35 and 2-4 positioning key teeth 36 equally spaced between the transmission key teeth 35. The indexing tooth thickness of each positioning key tooth 36 in the positioning section 32 is smaller than the...

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Abstract

The invention discloses a powder metallurgy synchronizer gear hub which comprises a gear hub body, an outer gear hub spline on the outer side of the gear hub body, and an inner gear hub spline on the inner side of the gear hub body. The inner gear hub spline comprises a guide section close to the press-in end of the synchronizer gear hub, and a locating section away from the press-in end of the synchronizer gear hub. The reference circle tooth thickness of the guide section is gradually increased from the press-in end of the synchronizer gear hub to the joint of the guide section and the locating section, and the reference circle tooth thickness of the guide section and the reference circle tooth thickness of the locating section are in smooth transition. The reference circle tooth thickness, at the press-in end of the synchronizer gear hub, of the guide section is smaller than the width of a reference circle tooth groove of an outer spline of a transmission shaft. It can be ensured that the powder metallurgy synchronizer gear hub is automatically kept coaxial with the outer spline of the transmission shaft when mounted on the outer spline of the transmission shaft, it is effectively avoided that the thick side faces of teeth of an inner spline at the press-in end of the synchronizer gear hub are extruded to be damaged, and meanwhile power and torque can be stably transferred.

Description

Technical field [0001] The invention relates to a synchronizer in an automobile transmission, in particular to a synchronizer gear hub made of powder metallurgy in the synchronizer. Background technique [0002] In the transmission of a car, the synchronizer is a device that synchronizes the speed of the gears that are engaged with each other when shifting gears. We know that in the process of shifting, the circumferential speeds of the engagement ring gears of the pair of gears to be meshed should be equalized so that the gear can be put on smoothly. Otherwise, there will be an impact between the two gear ring gears and noise, which will affect the gears. Life. In order to facilitate shifting, automobile transmissions are equipped with synchronizers between commonly used gears, so that a pair of meshing gears are synchronized first, and then meshed. Synchronizers have atmospheric and inertial types. At present, inertial synchronizers are mostly used in cars, which are mainly c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D23/04F16H55/17
CPCF16D23/04F16D2023/0625F16D2023/0656F16H55/17F16H2055/176
Inventor 倪良军宋伟郭跃灵罗大国陈勇王瑞平
Owner NINGBO SHANGZHONGXIA AUTOMATIC TRANSMISSION
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