Differential case convenient to install

Abstract

The differential case convenient to install comprises a left case body, a right case body and a driven gear, the driven gear and the right case body are integrally machined, a plurality of insertion holes are formed in the right case body, the right case body is circumferentially distributed around the axis of the driven gear, and a plurality of insertion parts connected with the insertion holes in an inserted mode are arranged on the edge of the right end of the left case body in a protruding and extending mode; the giant nut is located on the right side of the right shell, and the inserting parts can stretch out of the inserting holes and are in threaded connection with the giant nut. According to the differential case, the driven gear and the right half shaft are integrally manufactured, the step of bolted connection of the driven gear and the right case is omitted, the installation time is shortened, meanwhile, the left case is fixed to the right case by inserting the inserting part of the left case into the inserting hole of the right case and matching the huge nut with the inserting part in a threaded mode, and the left case is fixed to the right case. The differential carrier can be assembled through several simple steps, the time for assembling and disassembling the differential carrier is greatly shortened, and the assembling efficiency and assembling convenience of a differential are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of differentials, in particular to a differential case which is easy to install. Background Art

[0002] A differential is a mechanism that allows the left and right wheels of a vehicle to rotate at different speeds. It consists of a differential case, a driven gear, planetary gears, and left and right side gears, all of which are mounted on the differential case. A typical differential case consists of left and right housings. The driven gear is mounted to the right housing with 10-20 bolts, while the left housing is secured to the right housing or the driven gear with 5-10 bolts. Therefore, installing the differential requires repeated insertion and tightening of bolts, as well as disassembly, which is time-consuming, labor-intensive, and inconvenient. Utility Model Content

[0003] In order to solve the technical problems existing in the above background technology, the utility model provides a differential case that is easy to install.

[0004] The technical solution of this utility model is as follows:

[0005] A differential case that is easy to install, comprising a left housing, a right housing, and a driven gear. The driven gear and the right housing are integrally formed. The right housing is provided with a plurality of plug holes distributed circumferentially around the axis of the driven gear. A plurality of plug portions protruding from the right end edge of the left housing are plugged into the plug holes.

[0006] It also includes a giant nut, which is located on the right side of the right shell body. A plurality of plug-in parts can extend out of the plug-in hole and are threadedly connected with the giant nut at the same time.

[0007] During installation, the plug-in part of the left housing is inserted into the plug-in hole of the right housing, and then the giant nut is engaged with the thread of the plug-in part to fix the left housing on the right housing. The assembly of the differential case can be completed in just a few simple steps, which greatly shortens the time for installing and disassembling the differential case and improves the assembly efficiency of the differential.

[0008] In the above scheme, the differential case also includes a clamping piece and a locking nut. The clamping piece includes a connecting ring. The connecting ring is located on the right side of the plug-in part. A number of wedges are provided on its left side. The number of wedges are respectively located in the number of plug-in holes and between adjacent plug-in parts. The locking nut is threadedly connected to the connecting ring and can abut against the right side of the giant nut. The number of wedges is configured to move to the right when the locking nut is tightened, and press the number of plug-in parts and the side of the plug-in hole.

[0009] The wedge of the clamping member squeezes the left housing's connector into the socket, strengthening the connection between the left and right housings and effectively transferring the driven gear's torque to the left housing. The locking nut not only moves the clamping member but also, through the force of the wedge and the socket, locks the giant nut, preventing it from loosening and improving the stability of the connection between the left and right housings.

[0010] Preferably, the thread directions of the locking nut and the giant nut are different, thereby improving the locking ability of the locking nut on the giant nut.

[0011] In the present application, the plug-in portion is in the shape of an arc plate, the center of the arc is located on the axis of the driven gear, and the plug-in hole is an arc-shaped hole.

[0012] Furthermore, the side of the plug-in portion away from the wedge in the same hole is a first inclined surface, the right end of the plug-in portion is wider than the left end, the side of the wedge away from the plug-in portion in the same hole is a second inclined surface, the left end of the wedge is wider than the right end, and the side of the plug-in hole where the plug-in portion and the wedge abut is provided with an inclined surface that cooperates with the first and second inclined surfaces. This improves the left housing's ability to resist leftward axial forces while reducing the stress on the rectangular nut.

[0013] The inclination angle of the second inclined surface is greater than the inclination angle of the first inclined surface, so that the first inclined surface can be more quickly abutted and pressed against the inclined surface of the plug hole.

[0014] Preferably, the first bevel has an angle of 5-10 degrees. The angle should not be too large, as this will reduce the structural strength of the left end of the plug-in portion and increase the circumferential size of the plug-in hole, reducing the structural strength of the right housing. It should also not be too small, as this will weaken the clamping force of the plug-in hole on the plug-in portion, reducing the clamping effect and failing to achieve the desired effect.

[0015] In the present application, the plurality of plug holes are evenly distributed circumferentially around the axis of the driven gear.

[0016] Preferably, the number of the plurality of plug holes is 4-8.

[0017] In order to improve the structural strength of the plug-in portion and share the leftward axial force exerted on the left shell, a flange is provided at the right end of the left shell, and a plurality of plug-in portions are located on the right side of the flange.

[0018] The utility model provides a differential case that is easy to install. By manufacturing the driven gear and the right half-shaft as one piece, the steps of bolting the driven gear to the right housing and the installation time are saved. At the same time, the plug-in portion of the left housing is inserted into the plug-in hole of the right housing, and the giant nut is threadedly engaged with the plug-in portion to fix the left housing to the right housing. The assembly of the differential case can be completed in just a few steps, which greatly shortens the time for installing and disassembling the differential case, improves the assembly efficiency of the differential, and improves the convenience during assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In the attached figure:

[0020] Figure 1 is a schematic cross-sectional view of the differential case of the first embodiment;

[0021] Figure 2 is a schematic diagram of a differential case of embodiment 2;

[0022] Figure 3 is a cross-sectional schematic diagram of a differential case;

[0023] Figure 4 Schematic diagram of the exploded state of the differential case;

[0024] Figure 5 Schematic diagram of the mating of the plug-in portion, wedge block and plug-in hole.

[0025] The components represented by the reference numerals in the figure are:

[0026] 1. Left housing; 11. Connecting portion; 111. First bevel; 2. Right housing; 21. Connecting hole; 3. Driven gear; 4. Giant nut; 5. Clamping piece; 51. Connecting ring; 52. Wedge; 521. Second bevel; 6. Locking nut. DETAILED DESCRIPTION

[0027] Example 1:

[0028] like Figure 1 As shown, the embodiment of the present invention provides a differential case that is easy to install, including a left housing 1, a right housing 2 and a driven gear 3. The left housing 1 is provided with a cross shaft hole and a left half shaft hole, and the right housing 2 is provided with a right half shaft hole.

[0029] In this embodiment, the driven gear 3 and the right housing 2 are integrally formed by welding, casting, forging or other processes, which saves the steps and installation time of bolting the driven gear 3 to the right housing 2 and improves the structural strength between the two.

[0030] The right housing 2 is provided with a plurality of plug holes 21 distributed circumferentially around the axis of the driven gear 3 , and the right end edge of the left housing 1 is provided with a plurality of plug parts 11 that plug into the plug holes 21 .

[0031] The differential case further includes a giant nut 4 located on the right side of the right housing 2 . The plurality of plug-in portions 11 can extend out of the plug-in holes 21 and be threadedly connected to the giant nut 4 .

[0032] The plug portion 11 is preferably an arc-shaped plate, the center of the arc is located on the axis of the driven gear 3, and the plug hole 21 is an arc-shaped hole. The plug holes 21 are preferably evenly distributed around the axis of the driven gear 3, and the number of the plug holes 21 is preferably 4-8.

[0033] In addition, the right end of the left housing 1 may be provided with a flange, with several plug-in sections 11 disposed on the right side of the flange. This not only allows for ample thickness design space for the plug-in sections 11, thereby improving their structural strength, but also, through the design of the flange's radial dimensions and thickness, it can withstand greater circumferential torque exerted by the driven gear 3 on the left housing 1, thereby increasing the service life of the left housing 1. Furthermore, the right side of the flange mates with the left end face of the right housing 2, tightly coupling the left and right housings 2 and enclosing a cavity for accommodating the left and right side gears and planetary gears.

[0034] When assembling the differential case provided in this embodiment, the plug-in portion 11 of the left housing 1 is inserted into the plug-in hole 21 of the right housing 2, and then the giant nut 4 is threadedly engaged with the plug-in portion 11 and tightened to fix the left housing 1 to the right housing 2. The assembly of the differential case can be completed in just a few simple steps, which greatly shortens the time for installing and disassembling the differential case, improves the assembly efficiency of the differential, and improves the convenience during assembly.

[0035] Example 2:

[0036] like Figures 2 to 5 As shown, the structure of this embodiment is basically the same as that of the first embodiment, except that this embodiment further includes a clamping member 5 and a locking nut 6 for improving the connection firmness between the left shell 1 and the right shell 2.

[0037] Specifically, the clamping member 5 is located as a whole on the right side of the right housing 2, and includes a connecting ring 51. After the differential case can be assembled, the connecting ring 51 is located on the right side of the plug-in portion 11, and its circular axis is collinear with the axis of the driven gear 3, and the diameter of the outer ring is smaller than the outer diameter of the circular ring composed of several plug-in portions 11, so as not to affect the assembly of the giant nut 4 and the plug-in portion 11.

[0038] A plurality of wedges 52 are provided on the left side surface of the connecting ring 51. When the differential case is assembled, the plurality of wedges 52 are respectively located in the plurality of plug-in holes 21 and between adjacent plug-in portions 11, that is, they are arranged along the circumferential direction of the shaft of the driven gear 3 with the plug-in portions 11 in the same plug-in hole 21. In the plurality of plug-in holes 21, the distribution positions of the wedges 52 and the plug-in portions 11 are consistent.

[0039] The wedge block 52 is a wedge-shaped block structure with a large left end and a small right end, and the right end is fixedly connected to the connecting ring 51. The thickness of the wedge block in the radial direction of the connecting ring 51 is constant, while in the circumferential direction, the size of the wedge block 52 gradually increases from the right end to the left end.

[0040] The locking nut 6 is threadedly connected to the outer ring surface of the connecting ring 51 and can abut against the right side of the giant nut 4. By rotating the locking nut 6 to the left, the clamping member 5 is driven to move to the right to squeeze the multiple plug-in parts 11 into the plug-in holes 21.

[0041] In this embodiment, the wedge 52 of the clamping member 5 squeezes the plug portion 11 of the left housing 1 into the insertion hole 21, thereby strengthening the connection between the left and right housings 1 and 2 and facilitating the effective transmission of the rotational torque of the driven gear 3 to the left housing 1. The locking nut 6 not only serves to move the clamping member 5 but also, in conjunction with the force of the wedge 52 engaged in the insertion hole 21, locks the giant nut 4, preventing it from loosening and improving the stability of the connection between the left and right housings 1 and 2.

[0042] Specifically, the wedge 52 mates with the adjacent side surfaces of the plug block in the same hole, and both are flat surfaces colinear with the axis of the connecting ring 51. The side of the plug portion 11 facing away from the wedge 52 in the same hole is a first inclined surface 111, which makes the right end of the plug portion 11 wider than the left end. The side of the wedge 52 facing away from the plug portion 11 in the same hole is a second inclined surface 521, which makes the left end of the wedge 52 wider than the right end. The side of the plug hole 21 where the plug portion 11 and the wedge 52 abut is provided with an inclined surface that mates with the first inclined surface 111 and the second inclined surface 521. In this way, after the differential case is assembled, the wedge block 52 and the plug-in part 11 are pressed against each other, and the first inclined surface 111 and the second inclined surface 521 are respectively abutted and pressed against the corresponding inclined surfaces on the plug-in hole 21. At this time, the inclined surface of the plug-in hole 21 generates a force on the plug-in part 11 to prevent the plug-in part 11 from moving leftward, thereby improving the ability of the left housing 1 to resist the left axial force and reducing the force burden on the rectangular nut.

[0043] The cooperation between the second inclined surface and the inclined surface of the plug hole 21 is more conducive to the wedge block 52 squeezing the plug part 11. At the same time, the wedge block 52 is in surface contact with the side of the plug hole 21, which reduces the pressure at the contact position, improves the tightness of the connection between the two, and avoids damage to the contact point between the two.

[0044] More specifically, the inclination angle of the second inclined surface 521 is preferably greater than the inclination angle of the first inclined surface 111 , so that the first inclined surface can abut and press against the inclined surface of the insertion hole 21 more quickly.

[0045] The inclination angle of the first inclined surface 111 is preferably 5-10 degrees. The inclination angle of the first inclined surface 111 should not be too large, as this will reduce the structural strength of the left end of the plug-in portion 11 and increase the circumferential dimension of the plug-in hole 21, reducing the structural strength of the right housing 2. It should also not be too small, as this will reduce the clamping force (axial blocking force) of the plug-in hole 21 on the plug-in portion 11, reducing the clamping effect and failing to achieve the desired effect.

[0046] The specific structure of the locking nut 6 is that the right part of the inner ring surface is provided with a thread, and the left part is provided with a groove. The groove extends from the left side of the thread of the locking nut 6 along the axial direction of the driven gear 3 to the left to the left end face of the locking nut 6, and the diameter of the groove is larger than the outer diameter of the circular ring composed of several plug-in parts 11, so that the locking nut 6 can abut against the right side of the giant nut 4 while being threadedly engaged with the clamping member 5, thereby avoiding the giant nut 4 from rotating during the use of the differential case, which may cause the left housing 1 and the right housing 2 to be loosely connected, and playing a locking role on the giant nut 4.

[0047] Preferably, the thread directions of the locking nut 6 and the giant nut 4 are different. For example, the giant nut 4 is a right-handed thread and the locking nut 6 is a left-handed thread, so that the direction of loosening the giant nut 4 is the direction of tightening the locking nut 6, thereby improving the locking ability of the locking nut 6 on the giant nut 4.

[0048] When assembling the differential case provided in this embodiment, the wedge 52 of the clamping member 5 is first inserted into the insertion hole 21, and the second inclined surface is abutted against the inclined surface of the insertion hole 21 corresponding to the second inclined surface to leave space for the insertion of the plug-in portion 11. Then, the plug-in portion 11 of the left housing 1 is inserted into the insertion hole 21, and the giant nut 4 is threadedly engaged with the plug-in portion 11, but not tightened. At this time, the locking nut 6 is tightened to move the clamping member 5 to the right and clamp the plug-in portion 11 in the insertion hole 21. Due to the presence of the first inclined surface and the corresponding inclined surface in the insertion hole 21, when clamping, the left end face of the right housing 2 abuts against the right end face of the flange. Then, the giant nut 4 and the locking nut 6 are tightened in sequence to complete the assembly of the differential case.

[0049] Although this embodiment has more assembly steps than the first embodiment, it still saves many steps compared to the prior art, shortens the time required to install and remove the differential case, and improves the efficiency and convenience of differential assembly. Furthermore, compared to the first embodiment, the connection between the left and right housings 1 and 2 is more secure.

Claims

1. A differential case that is easy to install, comprising a left housing (1), a right housing (2) and a driven gear (3), characterized in that: The driven gear (3) and the right housing (2) are integrally formed, the right housing (2) is provided with a plurality of plug holes (21) distributed circumferentially around the axis of the driven gear (3), and the right end edge of the left housing (1) is provided with a plurality of plug-in portions (11) that are plugged into the plug holes (21); It also includes a giant nut (4) located on the right side of the right shell (2), and a plurality of the plug-in parts (11) can extend out of the plug-in hole (21) and be threadedly connected with the giant nut (4).

2. A differential case that is easy to install as claimed in claim 1, characterized in that: The invention also includes a clamping member (5) and a locking nut (6), wherein the clamping member (5) includes a connecting ring (51), the connecting ring (51) is located on the right side of the plug-in portion (11), and a plurality of wedges (52) are provided on the left side thereof, wherein the plurality of wedges (52) are respectively located in the plurality of plug-in holes (21) and between adjacent plug-in portions (11), the locking nut (6) is threadedly connected to the connecting ring (51) and can abut against the right side of the giant nut (4), and the plurality of wedges (52) are arranged to be able to move to the right when the locking nut (6) is tightened, and press the plurality of plug-in portions (11) and the side edges of the plug-in holes (21) tightly.

3. A differential case that is easy to install as claimed in claim 2, characterized in that: The locking nut (6) and the giant nut (4) have different thread directions.

4. A differential case that is easy to install as claimed in claim 2, characterized in that: The plug-in portion (11) is in the shape of an arc plate, the center of the arc is located on the axis of the driven gear (3), and the plug-in hole (21) is an arc-shaped hole.

5. A differential case that is easy to install as claimed in claim 4, characterized in that: The side of the plug-in portion (11) away from the wedge block (52) in the same hole is a first inclined surface (111), the width of the right end of the plug-in portion (11) is greater than the width of the left end, the side of the wedge block (52) away from the plug-in portion (11) in the same hole is a second inclined surface (521), the width of the left end of the wedge block (52) is greater than the width of the right end, and the side of the plug-in hole (21) that abuts the plug-in portion (11) and the wedge block (52) is provided with an inclined surface that matches the first inclined surface (111) and the second inclined surface (521).

6. A differential case that is easy to install as claimed in claim 5, characterized in that: The inclination angle of the second inclined surface (521) is greater than the inclination angle of the first inclined surface (111).

7. A differential case that is easy to install as claimed in claim 6, characterized in that: The inclination angle of the first inclined surface (111) is 5-10 degrees.

8. A differential case that is easy to install as claimed in claim 1, characterized in that: The plurality of plug holes (21) are evenly distributed circumferentially around the axis of the driven gear (3).

9. A differential case that is easy to install as claimed in claim 8, characterized in that: The number of the plurality of plug holes (21) is 4-8.

10. A differential case that is easy to install as claimed in claim 1, characterized in that: The right end of the left shell (1) is provided with a flange, and the plurality of plug-in parts (11) are located on the right side of the flange.

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