Differential mechanism
By designing structures such as fixed blocks, limit slots and sliding blocks in the differential, the problems of wear and disassembly difficulty caused by the rotation of the planetary shaft are solved, the planetary shaft can be stably and conveniently disassembled, and the service life and maintenance convenience of the differential are improved.
Patent Information
- Application Number
- CN202422513229.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-10-17
AI Technical Summary
The movement and self-rotation of the planetary shafts in existing differentials cause the planetary gears to collide with parts inside the differential, making noise and causing wear. In addition, the shaft pins are easily broken during disassembly, affecting disassembly efficiency.
A differential structure was designed, in which the rotation of the planetary shaft was restricted by fixed blocks and limit slots, and initial positioning was performed using pins and sockets. The sliding block and pinion cooperated to stabilize the planetary shaft. The oil injection hole facilitated lubrication, and the inclined bottom groove facilitated the removal of the fixed block, thus achieving stable and convenient disassembly of the planetary shaft.
It effectively prevents the planetary shaft from rotating, reduces wear, increases service life, simplifies the disassembly process, and ensures disassembly efficiency and lubrication effect.
Smart Images
Figure CN223318374U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of vehicles, and particularly relates to a differential. Background Art
[0002] The car differential is a mechanism that enables the left and right drive wheels to rotate at different speeds. Its function is to make the left and right wheels roll at different speeds when the car is turning or driving on uneven roads, that is, to ensure that the drive wheels on both sides perform pure rolling motion.
[0003] The differential is equipped with planetary gears and half-shaft gears. The planetary gears are installed on the planetary shafts. Inside the differential, the planetary shafts will move and rotate on their own, which can easily cause the planetary gears to move with the planetary shafts, causing the planetary gears to collide with the parts inside the differential, making noise, and further causing the half-shaft gears and planetary gears to wear. In order to prevent the planetary shafts from moving and rotating on their own, axle pins are usually inserted into the side of the planetary gears. However, when disassembling the differential, removing the planetary shafts will cause the axle pins to break and cause the differential housing to rupture. Utility Model Content
[0004] The purpose of the utility model is to address the above-mentioned problems existing in the prior art and to provide a differential that is convenient for fixing the planetary shaft and convenient for disassembly.
[0005] The utility model can be implemented through the following technical solutions: a differential comprises a differential housing, wherein a half-shaft gear and a planetary gear are installed in the differential housing, a planetary shaft is inserted into the planetary gear, a mounting hole is provided on the differential housing, a planetary shaft is installed in the mounting hole, a fixing groove is provided outside the mounting hole, a fixing block is installed in the fixing groove, the fixing block abuts against the planetary shaft, a groove is provided on the end surface of the planetary shaft, a limiting groove is provided on the groove, a boss is provided on the fixing block, and a limiting plate is provided on the boss.
[0006] In the above differential, a fixing plate is provided on the fixing block, a fixing hole is provided on the fixing plate, an insertion hole is provided on the fixing groove, and a pin penetrates the insertion hole and the fixing hole.
[0007] In the above differential, a through hole is provided in the insertion hole, and the through hole passes through the differential housing.
[0008] In the above differential, a sliding groove is provided on the fixed block, a sliding block is installed in the sliding groove, a sliding rail is provided on the sliding block, and a corresponding locking groove is provided on the inner wall of the fixed groove.
[0009] In the above differential, a mounting groove is provided at the end of the sliding groove, a pinion is installed in the mounting groove, a rotating shaft is provided on the pinion, a rack is provided on the sliding block, and the pinion is meshed with the rack.
[0010] In the above differential, a limiting hole is provided on the pinion gear, a straight hole is provided on the mounting groove, and the limiting hole and the straight hole pass through the limiting pin.
[0011] In the above differential, the fixing groove is provided with an oblique bottom groove, and the fixing plate is provided with a corresponding notch.
[0012] Compared with the existing technology, the advantages of the present invention are: the two ends of the planetary shaft are blocked by the fixed block, and the rotation of the planetary shaft is limited by the limit groove on the groove and the limit plate on the boss; the fixed block is preliminarily positioned by the combination of the pin and the socket, and the through hole provided at the socket is convenient for injecting lubricating oil into the differential; the sliding block can be controlled to be inserted into the slot by rotating the pinion to complete the fixation of the fixed block, effectively preventing the planetary shaft from lifting the fixing hole, and facilitating the disassembly of the fixed block. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a three-dimensional diagram of the differential;
[0014] Figure 2 is a cross-sectional view of the differential;
[0015] Figure 3 It is a cross-sectional view of the fixed block of the differential;
[0016] Figure 4 It is a three-dimensional diagram of the planetary shaft of the differential;
[0017] Figure 5 It is a top view of the fixed block of the differential;
[0018] Among them, 1. differential housing; 11. mounting hole; 111. fixing slot; 111a. jack; 112. oblique bottom slot; 113. slot; 2. half-axle gear; 3. planetary gear; 4. planetary shaft; 41. groove; 411. limit slot; 5. fixing block; 51. boss; 511. limit plate; 52. fixing plate; 521. fixing hole; 522. notch; 53. mounting slot; 531. straight hole; 54. sliding slot; 6. latch; 61. through hole; 7. sliding block; 71. slide rail; 72. rack; 8. pinion; 81. limit hole; 82. rotating shaft; 9. limit pin. DETAILED DESCRIPTION
[0019] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0020] like Figures 1 to 5As shown, the utility model can be implemented through the following embodiments: a differential includes a differential housing 1, a half-shaft gear 2 and a planetary gear 3 are installed in the differential housing 1, a planetary shaft 4 is inserted into the planetary gear 3, a mounting hole 11 is opened on the differential housing 1, the planetary shaft 4 is installed in the mounting hole 11, a fixing groove 111 is opened outside the mounting hole 11, a fixing block 5 is installed in the fixing groove 111, the fixing block 5 is against the planetary shaft 4, a groove 41 is opened on the end surface of the planetary shaft 4, a limiting groove 411 is opened on the groove 41, a boss 51 is provided on the fixing block 5, and a limiting plate 511 is provided on the boss 51.
[0021] The fixing blocks 5 are installed at both ends of the planetary shaft 4 to facilitate fixing the planetary shaft 4 and prevent the planetary shaft 4 from axial movement; the groove 41 on the planetary shaft 4 is provided with a limiting groove 411, which is used to cooperate with the boss 51 and the limiting plate 511 set on the fixing block 5 to prevent the planetary shaft 4 from frictional rotation, resulting in friction on the contact surface between the planetary shaft 4 and the planetary gear 3, which increases the gap on the contact surface, causes the planetary shaft 4 to loosen, and improves the service life of the planetary shaft 4; the boss 51 is used to provide support for the limiting plate 511 to prevent the limiting plate 511 from bending due to excessive rotation force of the planetary shaft 4.
[0022] like Figure 1 、 Figure 2 and Figure 5 As shown, the fixing block 5 is provided with a fixing plate 52, which has a fixing hole 521 defined therein. The fixing slot 111 is provided with a socket 111a, and a latch 6 extends through the socket 111a and the fixing hole 521. The fixing plate 52 has a fixing hole 521, which is adapted to engage with the socket 111a in the fixing slot 111. The latch 6 connects the socket 111a and the fixing hole 521 to prevent the fixing block 5 from shifting or rotating.
[0023] like Figure 2 As shown, a through hole 61 is formed in the socket 111a, and the through hole 61 passes through the differential housing 1. The through hole 61 passing through the differential housing 1 can be used to inject lubricating oil into the differential, facilitating maintenance of the differential. The latch 6 acts as a plug to prevent the lubricating oil from flowing out of the through hole 61.
[0024] like Figure 2 and Figure 5 As shown, the fixed block 5 is provided with a sliding groove 54, in which the sliding block 7 is mounted. The sliding block 7 is provided with a slide rail 71, and a corresponding locking groove 113 is provided on the inner wall of the fixed groove 111. The sliding groove 54 is used to accommodate the sliding block 7, so that the fixed block 5 is inserted into the fixed groove 111 without obstruction; the slide rail 71 is used to guide the sliding direction of the sliding block 7 and prevent the sliding block 7 from sliding and deviating; the locking groove 113 is used to engage the sliding block 7, so that the sliding block 7 fixes the fixed block 5 to the fixed groove 111, preventing the planetary shaft 4 from moving and ejecting the fixed block 5.
[0025] like Figure 2 and Figure 5 As shown, a mounting slot 53 is defined at the end of the sliding slot 54. A pinion 8 is mounted within the mounting slot 53. The pinion 8 is provided with a rotating shaft 82. The sliding block 7 is provided with a rack 72, with which the pinion 8 meshes. The mounting slot 53 is used to mount the pinion 8, which controls the displacement of the sliding block 7 through the meshing of the rack 72 and the gear teeth. The rotating shaft 82 on the pinion 8 is provided with a hexagonal recess 41, which facilitates rotation of the rotating shaft 82 with an hexagonal wrench, thereby driving the pinion 8 to rotate. This facilitates the extension and retraction of the sliding block 7, and facilitates the removal and installation of the fixed block 5.
[0026] like Figure 2 As shown, a limiting hole 81 is defined in the pinion 8, and a straight hole 531 is defined in the mounting slot 53. The limiting hole 81 and the straight hole 531 extend through the limiting pin 9. The limiting pin 9 is inserted into the limiting hole 81 and the straight hole 531 to limit the rotation of the pinion 8, preventing the pinion 8 from rotating on its own after rotation, causing the sliding block 7 to be accommodated in the sliding slot 54, causing the planetary shaft 4 to push out the fixed block 5.
[0027] like Figure 2 and Figure 3 As shown, the fixing groove 111 is provided with an oblique bottom groove 112, and the fixing plate 52 is provided with a corresponding notch 522. The oblique bottom groove 112 allows the pry bar to extend into the fixing groove 111 and insert into the notch 522, and apply force to pry out the fixing block 5, making it easier to disassemble the fixing block 5.
[0028] The working principle of the present invention is as follows: the differential housing 1, planetary gears 3, and side gears 2 are assembled, the planetary shaft 4 is inserted into the mounting hole 11, the fixing block 5 is then inserted into the fixing groove 111, the fixing hole 521 is aligned with the insertion hole 111a, and the latch 6 is inserted. The rotating shaft 82 is then rotated with an Allen wrench, and the rotating shaft 82 drives the pinion 8 to rotate. The rotating pinion 8 drives the sliding block 7 with the rack 72 to move, and the sliding block 7 is engaged in the locking groove 113, thereby fixing the fixing block 5 in the fixing groove 111. When lubricating oil needs to be injected into the differential, the latch 6 is pulled out, and lubricating oil is injected into the through hole 61 through the insertion hole 111a, and then the lubricating oil is injected into the differential.
[0029] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.
[0030] Although various terms are used in this document, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.
Claims
1. A differential comprising a differential housing (1), wherein a half-shaft gear (2) and a planetary gear (3) are mounted in the differential housing (1), and a planetary shaft (4) is inserted into the planetary gear (3), characterized in that: The differential housing (1) is provided with a mounting hole (11), a planetary shaft (4) is installed in the mounting hole (11), a fixing groove (111) is provided outside the mounting hole (11), a fixing block (5) is installed in the fixing groove (111), the fixing block (5) abuts against the planetary shaft (4), a groove (41) is provided on the end surface of the planetary shaft (4), a limiting groove (411) is provided on the groove (41), a boss (51) is provided on the fixing block (5), and a limiting plate (511) is provided on the boss (51).
2. A differential according to claim 1, characterized in that: The fixing block (5) is provided with a fixing plate (52), a fixing hole (521) is provided on the fixing plate (52), a plug hole (111a) is provided on the fixing groove (111), and a latch (6) passes through the plug hole (111a) and the fixing hole (521).
3. A differential according to claim 2, characterized in that: A through hole (61) is provided in the insertion hole (111a), and the through hole (61) passes through the differential housing (1).
4. A differential according to claim 1, characterized in that: The fixed block (5) is provided with a sliding groove (54), a sliding block (7) is installed in the sliding groove (54), a sliding rail (71) is provided on the sliding block (7), and a corresponding card groove (113) is provided on the inner wall of the fixed groove (111).
5. A differential according to claim 4, characterized in that: The end of the sliding groove (54) is provided with a mounting groove (53), a pinion (8) is installed in the mounting groove (53), a rotating shaft (82) is provided on the pinion (8), and the sliding block (7) is provided with a rack (72), and the pinion (8) is meshed with the rack (72).
6. A differential according to claim 5, characterized in that: A limiting hole (81) is provided on the pinion (8), a straight hole (531) is provided on the mounting groove (53), and the limiting hole (81) and the straight hole (531) pass through the limiting pin (9).
7. A differential according to claim 2, characterized in that: The fixing groove (111) is provided with an inclined bottom groove (112), and the fixing plate (52) is provided with a corresponding notch (522).