Spherical needle bearing and differential mechanism

Abstract

The utility model relates to a spherical needle bearing and a differential mechanism, and belongs to the technical field of mechanical transmission parts. The spherical needle roller bearing comprises a spherical retainer and an arc-shaped needle roller, the spherical retainer is of a spherical arc-shaped structure, and a plurality of roller pin grooves for mounting the arc-shaped roller pins are formed in the spherical retainer; the section of the arc-shaped roller pin is circular, and the axis is arc-shaped; and the arc-shaped roller pins are arranged in the roller pin grooves. The differential mechanism uses the spherical needle bearing; the spherical needle bearing is installed between the planetary gear and the differential mechanism shell. According to the technical scheme, by arranging the spherical needle bearings, the spherical retainers and the arc-shaped needle rollers, sliding friction between friction pairs can be adjusted into rolling friction, heat generated by friction between the friction pairs is reduced, the friction loss of a system assembly is reduced, and the transmission efficiency of the system assembly is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a spherical needle bearing and differential mechanism belong to mechanical transmission component technical field. BACKGROUND

[0002] With the continuous development of mechanical industry, system assembly needs to face more and more complex working conditions, wherein, in the occasion of two parts through spherical surface cooperation, still adopt the spherical surface gasket installation between two parts to meet the relative motion between two parts, since two parts are with spherical surface gasket face contact, only sliding friction between two parts, this will produce a large amount of friction heat, make the system assembly ablation risk big, transmission efficiency is low.

[0003] At present, the spherical surface gasket of conventional design is installed between two parts, and only sliding friction between the parts, resulting in heat generated by friction, there are two parts and spherical surface gasket 1 ablation risk, low transmission efficiency problem. INVENTION CONTENTS

[0004] The utility model discloses a spherical needle bearing and differential mechanism to solve the above technical problem.

[0005] In order to realize the above object, the utility model adopts the technical scheme of:

[0006] A spherical needle bearing, including spherical cage and circular arc needle, the spherical cage is spherical arc structure, and a plurality of needle grooves for installing circular arc needle are arranged on the spherical cage, the cross section of the circular arc needle is circular, and the axis is arc, and the circular arc needle is installed in the needle groove.

[0007] The further improvement of the utility model technical scheme is that the circular arc needle is uniformly distributed at the same angle around the center of the spherical cage.

[0008] A differential mechanism uses the above spherical needle bearing, the differential mechanism includes main reduction gear, differential housing and planetary gear shaft, the main reduction gear is fixed on the outer surface of the differential housing, the planetary gear shaft is connected with the differential housing by using roll pin, the planetary gear is installed on the planetary gear shaft, further including half shaft gear, the half shaft gear is installed on the differential housing and is engaged with the planetary gear, the half shaft for connecting with the vehicle is installed on the opposite end surface of the differential housing, and the spherical needle bearing is installed between the planetary gear and the differential housing.

[0009] The further improvement of the utility model technical scheme is that the spherical support frame of the spherical needle bearing is matched with the planetary gear.

[0010] Due to the adoption of the above technical scheme, the utility model has the following technical effects:

[0011] The technical scheme adjusts the sliding friction between the friction pairs to rolling friction, reduces the heat generated by friction between the friction pairs, reduces the risk of ablation between the friction pairs, and improves the reliability of the system assembly.

[0012] The technical scheme adjusts the sliding friction between the friction pairs to rolling friction, reduces the heat generated by friction between the friction pairs, reduces the risk of ablation between the friction pairs, and improves the reliability of the system assembly.

[0013] The ball needle bearing of the technical scheme is used, the ball needle bearing replaces the spherical gasket, the sliding friction between the parts is adjusted to rolling friction, so that the heat generated by friction is reduced when the system assembly is running, the corresponding loss is reduced, and the transmission efficiency of the system assembly is improved; and the risk of part wear and ablation is reduced, and the reliability of the system assembly is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a schematic view of the spherical needle bearing of the utility model;

[0015] Figure 2 is a front view of the spherical needle bearing of the utility model;

[0016] Figure 3 is a schematic view of the spherical cage of the utility model;

[0017] Figure 4 is a schematic view of the arc-shaped needle of the utility model;

[0018] Figure 5 is a schematic view of the differential applied with the spherical needle bearing;

[0019] Figure 6 is a schematic view of the part using the spherical gasket of the prior art;

[0020] 1, spherical needle bearing, 2, spherical cage, 3, arc-shaped needle, 4, main reduction gear, 5, differential housing, 6, roll pin, 7, planetary gear shaft, 8, planetary gear, 9, half shaft gear, 10, half shaft. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0022] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "front end", "rear end", "two ends", "one end", "the other end", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0023] The utility model relates to a spherical needle roller bearing, which is mainly used in differentials of automobiles.

[0024] like Figure 1 As shown, the spherical needle roller bearing includes a spherical retainer 2 and arc-shaped needle rollers 3. The spherical retainer 2 is a spherical arc structure, and the spherical retainer 2 is a sheet structure. Several needle roller grooves are provided on the arc surface of the spherical retainer 2, and the arc-shaped needle rollers 3 are mounted through the needle roller grooves.

[0025] The arc-shaped needle roller 3 is a needle-like structure with a circular cross section and an arc-shaped extended axis. During assembly, the arc-shaped needle roller 3 is installed in the needle roller groove, which is adapted to fit the arc-shaped needle roller 3.

[0026] like Figure 1 As shown, in order to ensure that the bearing can work smoothly, the arc-shaped needle rollers 3 are evenly distributed around the center of the spherical retainer 2 at the same angle.

[0027] The present technical solution also discloses a differential, which uses the above-mentioned spherical needle roller bearing. The main structure of the following differential is a conventional arrangement, and the main feature of the differential is that the above-mentioned spherical needle roller bearing is used.

[0028] As shown in the figure, the differential includes a final reduction gear 4, a differential housing 5, and planetary gear shafts 7. The final reduction gear 4 is fixed to the outer surface of the differential housing 5. The differential housing 5 and final reduction gear 4 are fixed together, and the planetary gear shafts 7 are fixed to the differential housing 5 by winding pins 6. The differential housing 5 transmits torque and speed to the planetary gear shafts 7.

[0029] The planetary gear shaft 7 is connected to the differential case 5 using a winding pin 6. Planetary gears 8 are mounted on the planetary gear shaft 7. The planetary gears 8 can rotate around the planetary gear shaft 7 and mesh with the side gears 9 to transmit torque and speed difference.

[0030] The differential further includes side gears 9 , which are also mounted on the differential case 5 and mesh with the planetary gears 8 .

[0031] Axle shafts 10 are mounted on two opposite end surfaces of the differential housing 5 , respectively. The differential housing 5 is connected to the wheels of the vehicle via the axle shafts 10 . The axle shafts 10 are used to transmit the torque and speed of the vehicle.

[0032] Spherical needle roller bearing 1 is installed between planetary gear 8 and differential housing 5. Spherical retainer 2 is spherical in shape, holding arc-shaped needle rollers 3 in regular positions, resulting in a regular spherical arrangement of multiple arc-shaped needle rollers 3. Arc-shaped needle rollers 13, mounted within spherical retainer 12, create rolling friction during operation, transmitting force and speed.

[0033] The spherical cage 2 of the spherical needle roller bearing 1 is adapted to the planetary gears 8 .

[0034] When the left and right wheels rotate at different speeds, there is a speed difference between the left and right half-shafts 10. At this time, the half-shaft 10 drives the half-shaft gear 9 to rotate, and the planetary gear 8 engages with the half-shaft gear 9. Then, the planetary gear 8 rotates around the planetary gear shaft 7. Then, the planetary gear 8 drives the spherical needle roller bearing 1 to rotate. The spherical needle roller bearing 1 performs rolling friction between the planetary gear 8 and the differential case 5, thereby achieving low friction heat generation, low friction loss, high transmission efficiency and high reliability.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A spherical roller bearing, characterized by: The spherical roller bearing comprises a spherical cage (2) and a circular-arc-shaped roller pin (3); the spherical cage (2) is in a spherical arc shape, and a plurality of roller pin grooves for mounting the circular-arc-shaped roller pin (3) are arranged on the spherical cage (2); the cross section of the circular-arc-shaped roller pin (3) is circular, and the axis is arc-shaped; and the circular-arc-shaped roller pin (3) is mounted in the roller pin groove.

2. A spherical roller bearing according to claim 1, characterized in that: The circular-arc-shaped roller pins (3) are uniformly distributed at the same angle around the center of the spherical cage (2).

3. A differential characterized by: The spherical roller bearing of claim 1 or 2 is used; the differential comprises a main reduction gear (4), a differential housing (5) and a planetary gear shaft (7); the main reduction gear (4) is fixed on the outer surface of the differential housing (5); the planetary gear shaft (7) is connected to the differential housing (5) by using a roll pin (6); a planetary gear (8) is mounted on the planetary gear shaft (7); further comprising a half shaft gear (9) mounted on the differential housing (5) and engaged with the planetary gear (8); half shafts (10) for connecting to a vehicle are respectively mounted on the opposite end faces of the differential housing (5); and the spherical roller bearing (1) is mounted between the planetary gear (8) and the differential housing (5).

4. A differential as defined in claim 3, wherein: The spherical cage (2) of the spherical roller bearing (1) is adapted to the planetary gear (8).

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