CN214367587U - Differential lock structure and axle assembly - Google Patents
Differential lock structure and axle assembly Download PDFInfo
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- CN214367587U CN214367587U CN202120059298.9U CN202120059298U CN214367587U CN 214367587 U CN214367587 U CN 214367587U CN 202120059298 U CN202120059298 U CN 202120059298U CN 214367587 U CN214367587 U CN 214367587U
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- differential lock
- gear
- screw rod
- connecting shaft
- shifting fork
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Abstract
The utility model belongs to the technical field of the car axle, a differential lock structure and axle assembly are disclosed. The differential lock structure comprises a motor, a fixed gear sleeve and a sliding gear sleeve; the driving gear is connected to the output end of the motor; the transmission assembly comprises a driven gear and a screw rod which are coaxially arranged, the driven gear is meshed with the driving gear, and an annular groove is formed in the outer wall of the screw rod; one end of the shifting fork is sleeved on the screw and is in transmission connection with the screw, the other end of the shifting fork abuts against the sliding gear sleeve, and the motor is configured to drive the driving gear to rotate and drive the driven gear and the screw to rotate, so that the shifting fork can move along the axial direction of the screw, and the end face teeth of the sliding gear sleeve are selectively meshed with the end face teeth of the fixed gear sleeve; the limiting piece is inserted into the annular groove and used for limiting the screw rod; and the sensor can abut against the top surface of the shifting fork and is used for detecting the position of the shifting fork. The differential lock has high structure reliability and good transmission effect.
Description
Technical Field
The utility model relates to an automobile axle technical field especially relates to a differential lock structure and axle assembly.
Background
The electric automobile is a novel vehicle which drives the vehicle to run by taking a vehicle-mounted power storage battery as power, and the electric automobile is more and more emphasized in recent years because the electric automobile has the characteristics of energy conservation, environmental protection and portability and is lower in use cost.
In the automobile axle of the existing electric automobile, the differential lock mostly adopts air pressure as power, the structure needs structural accessories such as a piston cylinder, the like, the piston cylinder is easy to corrode, the gas leakage and other faults occur, and the locking stroke can not be accurately controlled. The middle transmission structure of the differential lock lacks effective support and limit, so that the transmission effect is poor and the reliability is poor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a differential lock structure and axle assembly, the reliability is high, and transmission effect is good.
To achieve the purpose, the utility model adopts the following technical proposal:
a differential lock structure includes:
the motor, the fixed gear sleeve and the sliding gear sleeve;
the driving gear is connected to the output end of the motor;
the transmission assembly comprises a driven gear and a screw rod which are coaxially arranged, the driven gear is meshed with the driving gear, the number of teeth of the driving gear is less than that of the driven gear, and an annular groove is formed in the outer wall of the screw rod;
one end of the shifting fork is sleeved on the screw and is in transmission connection with the screw, the other end of the shifting fork abuts against the sliding gear sleeve, and the motor is configured to drive the driving gear to rotate and drive the driven gear and the screw to rotate, so that the shifting fork can move along the axial direction of the screw, and the end face teeth of the sliding gear sleeve are selectively meshed with the end face teeth of the fixed gear sleeve;
the limiting piece is inserted into the annular groove and used for limiting the screw rod;
and the sensor can abut against the top surface of the shifting fork and is used for detecting the position of the shifting fork.
Preferably, the top surface of the fork is inclined with respect to a horizontal plane.
Preferably, a fixed ring groove is formed in the outer wall of the sliding gear sleeve, and the shifting fork is inserted into the fixed ring groove.
Preferably, the gear box further comprises a reduction box, the fixed gear sleeve, the sliding gear sleeve, the driving gear, the transmission assembly and the shifting fork are arranged in the reduction box, and the motor, the limiting piece and the sensor are respectively arranged in the reduction box in a penetrating mode.
Preferably, the reduction gearbox comprises a shell and an end cover, wherein an opening is formed in one side of the shell, the end cover is arranged on the opening, and the shell is connected with the end cover through a connecting piece.
Preferably, the transmission assembly further comprises a first connecting shaft, and the first connecting shaft is arranged on one side, far away from the shifting fork, of the driven gear and penetrates through the end cover.
Preferably, the transmission assembly further includes a first bushing, and the first bushing is sleeved on the first connecting shaft and located between the first connecting shaft and the end cover.
Preferably, the transmission assembly further comprises a second connecting shaft, and the second connecting shaft is arranged on one side, far away from the shifting fork, of the screw rod and penetrates through the shell.
Preferably, the transmission assembly further includes a second bushing, and the second bushing is sleeved on the second connecting shaft and located between the second connecting shaft and the housing.
In order to achieve the above object, the utility model also provides an axle assembly, including foretell differential lock structure.
The utility model has the advantages that:
the utility model provides a differential lock structure, when needs locking, motor drive driving gear forward rotates, along with the rotation of driving gear, also rotates thereupon with driving gear engaged driven gear to it rotates to drive the screw rod. The screw rod is arranged on the end sleeve through the shifting fork, the shifting fork is in transmission connection with the screw rod, a screw nut pair is formed between the screw rod and the shifting fork, the rotary motion of the screw rod is converted into the linear motion of the shifting fork along the axial direction of the screw rod, the axial moving function of the shifting fork is realized, the shifting fork drives the sliding gear sleeve to move towards the direction close to the fixed gear sleeve, the end face teeth of the sliding gear sleeve and the end face teeth of the fixed gear sleeve are meshed with each other, and the locking function is realized.
When not needing the locking, motor drive driving gear antiport along with the rotation of driving gear, also rotates thereupon with driving gear engaged with driven gear to drive the screw rod and rotate, turn into the rotary motion of screw rod shift fork along the axial linear motion of screw rod, the shift fork is stirred the slip tooth cover and is removed to the direction of keeping away from fixed tooth cover, makes the terminal surface tooth of slip tooth cover and the terminal surface tooth of fixed tooth cover break away from each other, realizes the function of unblock.
The motor is used as a power source of the differential lock structure to replace an original pneumatic piston cylinder structure, and the reliability of the differential lock is improved. Simultaneously, be provided with the ring channel on the outer wall of screw rod, the locating part is pegged graft in the ring channel for the screw rod is spacing, avoids the screw rod position deviation to appear. In addition, wear to locate the reducing gear box with the sensor, the sensor can the butt in the top surface of shift fork for detect the position of shift fork, can carry out real-time supervision to the rotation of screw rod and the removal of shift fork.
The utility model also provides a pair of axle assembly, including foretell differential lock structure, the reliability is high, and the transmission is effectual.
Drawings
Fig. 1 is a schematic structural view of the differential lock structure of the present invention;
fig. 2 is a schematic structural view of a driving gear in the differential lock structure of the present invention;
FIG. 3 is a schematic structural view of a view angle of a shift fork in the differential lock structure of the present invention;
fig. 4 is a schematic structural view of another view angle of the shifting fork in the differential lock structure of the present invention;
fig. 5 is a schematic structural view of a transmission assembly in the differential lock structure of the present invention.
In the figure:
1. a motor; 2. fixing a gear sleeve; 3. a sliding gear sleeve; 4. a driving gear; 5. a transmission assembly; 6. a shifting fork; 7. a limiting member; 8. a sensor; 9. a reduction gearbox;
41. a spline shaft;
51. a driven gear; 52. a screw; 521. an annular groove; 53. a first connecting shaft; 54. a first bushing; 55. a second connecting shaft; 56. a second bushing;
61. a third threaded hole; 62. a fork head;
91. a housing; 92. and (4) end covers.
Detailed Description
In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
The embodiment provides a differential lock structure, is applicable to the axle technical field of car. As shown in fig. 1, the differential lock structure comprises a reduction gearbox 9, a motor 1, a fixed gear sleeve 2, a sliding gear sleeve 3, a driving gear 4, a transmission assembly 5, a shifting fork 6, a limiting part 7 and a sensor 8, wherein an accommodating cavity is formed in the reduction gearbox 9, the accommodating cavity can accommodate the fixed gear sleeve 2, the sliding gear sleeve 3, the driving gear 4, the transmission assembly 5 and the shifting fork 6, and the reduction gearbox 9 plays a role in accommodating. The motor 1, the limiting part 7 and the sensor 8 are respectively arranged in the reduction gearbox 9 in a penetrating way, and the reduction gearbox 9 plays a supporting role. Specifically, the reduction gearbox 9 includes a housing 91 and an end cover 92, an opening is provided at one side of the housing 91, the end cover 92 covers the opening, and the housing 91 and the end cover 92 are connected by a connecting member to ensure the connection stability of the overall structure. Wherein, the connecting piece is specifically a bolt.
The motor 1 is a driving source, the output end of the motor 1 is connected to the driving gear 4, and preferably, the spline shaft 41 of the driving gear 4 is inserted into the spline hole of the motor 1 (as shown in fig. 2), so that the connection reliability is good. The transmission assembly 5 plays a role of power transmission, the transmission assembly 5 comprises a driven gear 51 and a screw rod 52, the driven gear 51 and the screw rod 52 are coaxially arranged and connected with each other, and the driven gear 51 is meshed with the driving gear 4. Preferably, the number of teeth of the driving gear 4 is smaller than that of the driven gear 51, and a speed reduction function of the motor 1 is implemented to convert a high-speed rotation of the motor 1 into a low-speed rotation motion.
One end of the shifting fork 6 is sleeved on the screw rod 52 and is in transmission connection with the screw rod 52, and the other end of the shifting fork 6 is abutted against the sliding gear sleeve 3. The motor 1 is configured to drive the driving gear 4 to rotate and drive the driven gear 51 and the screw 52 to rotate, so that the shift fork 6 can move along the axial direction of the screw 52 to selectively engage the end face teeth of the sliding gear sleeve 3 with the end face teeth of the fixed gear sleeve 2, thereby realizing the function of a differential lock. The motor 1 is used as a power source of the differential lock structure to replace an original pneumatic piston cylinder structure, and the reliability of the differential lock is improved.
When locking is required, the motor 1 drives the driving gear 4 to rotate in a forward direction, and along with the rotation of the driving gear 4, the driven gear 51 engaged with the driving gear 4 also rotates, so as to drive the screw 52 to rotate. Locate on the screw rod 52 and be connected with the screw rod 52 transmission through the pot head that sets up shift fork 6, make and form screw nut between screw rod 52 and the shift fork 6 vice, turn into shift fork 6 along the axial linear motion of screw rod 52 with the rotary motion of screw rod 52, realize the axial displacement function of shift fork 6, shift fork 6 stirs slip facing 3 and removes to the direction that is close to fixed facing 2, make the terminal surface tooth of slip facing 3 and the terminal surface tooth intermeshing of fixed facing 2, realize the function of locking.
When the locking is not needed, the motor 1 drives the driving gear 4 to rotate reversely, the driven gear 51 meshed with the driving gear 4 rotates along with the rotation of the driving gear 4, so that the screw rod 52 is driven to rotate, the rotary motion of the screw rod 52 is converted into the linear motion of the shifting fork 6 along the axial direction of the screw rod 52, the shifting fork 6 shifts the sliding gear sleeve 3 to move in the direction away from the fixed gear sleeve 2, the end face teeth of the sliding gear sleeve 3 and the end face teeth of the fixed gear sleeve 2 are separated from each other, and the unlocking function is achieved.
In order to avoid the axial movement of the screw 52, an annular groove 521 is provided on the outer wall of the screw 52, the limiting member 7 is specifically a cylindrical pin, and the limiting member 7 is inserted into the annular groove 521 for limiting the screw 52 and avoiding the position offset of the screw 52. Preferably, a first threaded hole is formed in the reduction gearbox 9, and the outer wall of the cylindrical pin is in threaded connection with the first threaded hole so as to ensure the fixing effect of the cylindrical pin.
In order to monitor the rotation of the screw 52 and the movement of the shifting fork 6 in real time, the sensor 8 is arranged in the reduction gearbox 9 in a penetrating way, and the sensor 8 can be abutted against the top surface of the shifting fork 6 and used for detecting the position of the shifting fork 6. Preferably, a second threaded hole is formed in the reduction gearbox 9, and the outer wall of the sensor 8 is in threaded connection with the second threaded hole so as to ensure the fixing effect of the sensor 8.
Further, the top surface of the shift fork 6 is disposed obliquely with respect to the horizontal plane. Preferably, the top surface of the shift fork 6 is inclined to a direction close to the inner wall of the reduction gear casing 9 so that the distance between the top surface of the shift fork 6 and the inner wall of the reduction gear casing 9 is gradually reduced in a direction away from the driven gear 51. The top surface of the shifting fork 6 adopts a wedge-shaped structure, so that the sensor can be better matched with a contact of the sensor 8.
Further, as shown in fig. 3-4, the cross section of the shift fork 6 is approximately a V-shaped structure, one end of the shift fork 6 is provided with a third threaded hole 61, and the threaded hole of the shift fork 6 is in threaded connection with the outer wall of the screw 52, so as to achieve the transmission effect between the shift fork 6 and the screw 52. The other end of the shifting fork 6 is a fork head 62, a fixed ring groove is formed in the outer wall of the sliding gear sleeve 3, and the shifting fork 6 is inserted into the fixed ring groove, so that the end face of the fork head 62 is attached to the end face of the fixed ring groove, and the shifting effect of the shifting fork 6 on the sliding gear sleeve 3 is guaranteed.
Further, as shown in fig. 1 and 5, the transmission assembly 5 further includes a first connecting shaft 53 and a first bushing 54, the first connecting shaft 53 is disposed on a side of the driven gear 51 away from the shift fork 6 and penetrates through the end cap 92. The first connecting shaft 53 penetrates through the end cover 92 to ensure the bearing effect of the transmission assembly 5. The first bushing 54 is sleeved on the first connecting shaft 53 and located between the first connecting shaft 53 and the end cover 92. By arranging the first bushing 54, the first connecting shaft 53 is prevented from being easily abraded with the end cover 92 during the rotation process, and the first connecting shaft 53 is protected.
Further, the transmission assembly 5 further includes a second connecting shaft 55 and a second bushing 56, wherein the second connecting shaft 55 is disposed on a side of the screw 52 away from the shift fork 6 and penetrates the housing 91. The second connecting shaft 55 penetrates the housing 91 to ensure the bearing effect of the transmission assembly 5. The second bushing 56 is sleeved on the second connecting shaft 55 and located between the second connecting shaft 55 and the housing 91. By arranging the second bushing 56, the second connecting shaft 55 is prevented from being easily abraded with the outer shell 91 in the rotating process, and the second connecting shaft 55 is protected.
The axle assembly that this embodiment still provided, including foretell differential lock structure, the reliability is high, and transmission effect is good.
In the description herein, it is to be understood that the terms "upper", "lower", "right", and the like are used in an orientation or positional relationship based on that shown in the drawings for convenience of description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.
In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied thereto. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A differential lock structure, comprising:
the gear box comprises a motor (1), a fixed gear sleeve (2) and a sliding gear sleeve (3);
a driving gear (4) connected to an output end of the motor (1);
the transmission assembly (5) comprises a driven gear (51) and a screw rod (52) which are coaxially arranged, the driven gear (51) is meshed with the driving gear (4), the number of teeth of the driving gear (4) is smaller than that of the driven gear (51), and an annular groove (521) is formed in the outer wall of the screw rod (52);
one end of the shifting fork (6) is sleeved on the screw rod (52) and is in transmission connection with the screw rod (52), the other end of the shifting fork (6) abuts against the sliding gear sleeve (3), the motor (1) is configured to drive the driving gear (4) to rotate and drive the driven gear (51) and the screw rod (52) to rotate, the shifting fork (6) can move along the axial direction of the screw rod (52), and therefore end face teeth of the sliding gear sleeve (3) are selectively meshed with end face teeth of the fixed gear sleeve (2);
the limiting piece (7) is inserted into the annular groove (521) and used for limiting the screw rod (52);
and a sensor (8) which can abut against the top surface of the shift fork (6) and is used for detecting the position of the shift fork (6).
2. Differential lock construction according to claim 1, characterised in that the top surface of the shift fork (6) is arranged inclined in relation to the horizontal plane.
3. A differential lock construction according to claim 1, characterized in that a fixing ring groove is provided on the outer wall of the sliding sleeve gear (3), and the shift fork (6) is inserted into the fixing ring groove.
4. The differential lock structure according to claim 1, further comprising a reduction gearbox (9), wherein the fixed gear sleeve (2), the sliding gear sleeve (3), the driving gear (4), the transmission assembly (5) and the shifting fork (6) are arranged in the reduction gearbox (9), and the motor (1), the limiting member (7) and the sensor (8) are respectively arranged in the reduction gearbox (9) in a penetrating manner.
5. A differential lock structure as claimed in claim 4, characterized in that the reduction gearbox (9) comprises a housing (91) and an end cover (92), an opening is provided on one side of the housing (91), the end cover (92) covers the opening, and the housing (91) and the end cover (92) are connected by a connecting piece (93).
6. A differential lock structure according to claim 5, characterized in that the transmission assembly (5) further comprises a first connecting shaft (53), the first connecting shaft (53) being provided on the side of the driven gear (51) remote from the shift fork (6) and penetrating the end cap (92).
7. A differential lock arrangement according to claim 6, characterized in that the transmission assembly (5) further comprises a first bushing (54), the first bushing (54) being sleeved on the first connecting shaft (53) and being located between the first connecting shaft (53) and the end cover (92).
8. A differential lock structure according to claim 6, characterized in that the transmission assembly (5) further comprises a second connecting shaft (55), the second connecting shaft (55) being provided on a side of the screw (52) remote from the shift fork (6) and penetrating the housing (91).
9. A differential lock arrangement according to claim 8, characterized in that the transmission assembly (5) further comprises a second bushing (56), the second bushing (56) being sleeved on the second connecting shaft (55) and being located between the second connecting shaft (55) and the housing (91).
10. An axle assembly comprising the differential lock structure of any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120059298.9U CN214367587U (en) | 2021-01-11 | 2021-01-11 | Differential lock structure and axle assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120059298.9U CN214367587U (en) | 2021-01-11 | 2021-01-11 | Differential lock structure and axle assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214367587U true CN214367587U (en) | 2021-10-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120059298.9U Active CN214367587U (en) | 2021-01-11 | 2021-01-11 | Differential lock structure and axle assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214367587U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113669428A (en) * | 2021-07-20 | 2021-11-19 | 一汽解放汽车有限公司 | Electric differential lock |
-
2021
- 2021-01-11 CN CN202120059298.9U patent/CN214367587U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113669428A (en) * | 2021-07-20 | 2021-11-19 | 一汽解放汽车有限公司 | Electric differential lock |
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