CN217422094U - Differential assembly and drive axle - Google Patents
Differential assembly and drive axle Download PDFInfo
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- CN217422094U CN217422094U CN202221019511.4U CN202221019511U CN217422094U CN 217422094 U CN217422094 U CN 217422094U CN 202221019511 U CN202221019511 U CN 202221019511U CN 217422094 U CN217422094 U CN 217422094U
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- pressure plate
- differential
- locking
- friction
- pressure
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Abstract
The utility model relates to a differential mechanism assembly, in order to solve the unsatisfactory problem of roof pressure subassembly restoration when the differential lock locking in the present differential mechanism assembly is relieved, the utility model discloses a structure of a differential mechanism assembly and transaxle, wherein the roof pressure subassembly includes many spiral reset springs, through fastening components fixed connection first pressure disk and second pressure disk in the differential mechanism assembly, first pressure disk is adjacent with the friction pair, the second pressure disk can be promoted by the piston of the locking hydro-cylinder and move along the axle shaft axial; the shell is provided with a spring mounting part which radially protrudes into a gap between the first pressure plate and the second pressure plate, each spiral reset spring is arranged around the circumference of the half shaft, one end of each spiral reset spring is connected with the spring mounting part, and the other end of each spiral reset spring is connected with the second pressure plate. The utility model discloses in, the friction is vice more easily throw off completely when the differential locking is relieved, avoids the differential locking to relieve the back still to have the friction, and reset spring comprises the less coil spring of a plurality of diameters simultaneously, has saved the structure space, has also increaseed the ability of return.
Description
Technical Field
The utility model relates to a differential mechanism assembly for transaxle, more specifically say, relate to a differential mechanism assembly and transaxle.
Background
The differential assembly is an important part of a drive axle, and a differential lock is usually arranged on the differential for preventing the wheel from skidding on one side. When the differential lock is used, the half shafts of the drive axle and the differential shell are locked, so that the two half shafts and the differential shell synchronously rotate, and the differential loses the differential function, thereby avoiding the drive axle from unilateral slipping.
The differential lock comprises a friction pair, a differential locking oil cylinder and a jacking assembly. The friction pair is arranged in the differential mechanism shell, a driving friction plate and a driven friction plate which form the friction pair are correspondingly connected with the spline sleeve and the differential mechanism shell through splines, the spline sleeve is connected with the half axle through splines, the differential locking oil cylinder is located at the axial end part of the differential mechanism shell, the jacking assembly is arranged between the friction pair and the differential locking oil cylinder, and two ends of the jacking assembly are respectively in contact connection with the friction pair and the differential locking oil cylinder.
In the prior art, for convenience of installation, the pressing component includes two pressing members and a return spring, which are connected in contact, for example, in the main speed reducer assembly and the drive axle disclosed in chinese patent document CN108953538, as shown in fig. 1, the two pressing members are a pressure plate 31 and a shaft sleeve 32, respectively, the pressure plate 31 and the shaft sleeve 32 are connected in contact, and the return spring 33 is disposed between the shaft sleeve 32 and the housing 10. When the differential lock is unlocked, the return spring 32 pushes the shaft sleeve to move back to the friction pair 20 and towards the direction of the differential locking oil cylinder 40, the pressure plate is separated from contact with the shaft sleeve, the driving friction plate and the driven friction plate in the friction pair are separated from contact, and locking release is realized between the spline sleeve (and the half shaft) and the shell.
In the scheme, when the differential lock is unlocked, although the shaft sleeve and the pressure plate are separated from contact, the pressure plate is not forced to move in the direction opposite to the friction pair by external force, and the pressure plate moves completely by means of vibration when the friction pair rotates to separate the pressure plate from contact with the friction pair. When the pressure plate is adhered to the shell by oil stains, the moving distance of the pressure plate back to the friction pair is insufficient when the locking of the differential lock is released, so that friction exists between the driving friction plate and the driven friction plate in the friction pair, the service life of the friction pair is shortened by consumption, energy is consumed well, and the heating value of the drive axle is increased.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is that the unsatisfactory problem that roof pressure subassembly resets when differential lock locking is relieved in the current differential mechanism assembly provides a differential mechanism assembly and transaxle.
The utility model discloses a realize that the technical scheme of its purpose is like: the differential assembly comprises a differential and a differential lock, wherein the differential lock comprises a friction pair, a jacking component, a locking oil cylinder and a spline sleeve connected with a half shaft spline, the spline sleeve and the friction pair are positioned in a differential shell, and the friction pair is in spline connection with the differential shell and the spline sleeve; the locking oil cylinder is positioned outside the differential shell;
the pressing component comprises a plurality of spiral reset springs, a first pressing plate and a second pressing plate;
the first pressure plate and the second pressure plate are coaxially arranged with the half shaft and fixedly connected through a fastening assembly, the first end face of the first pressure plate is adjacent to the friction pair, the second end face of the first pressure plate is adjacent to the first end face of the second pressure plate, and the second end face of the second pressure plate can be pushed by a piston of the locking oil cylinder to axially move along the half shaft;
the shell is provided with a spring mounting part which radially protrudes into a gap between the first pressure plate and the second pressure plate, each spiral reset spring is arranged around the circumference of the half shaft, one end of each spiral reset spring is connected with the spring mounting part, and the other end of each spiral reset spring is connected with the second pressure plate.
The utility model discloses in, first pressure disk and second pressure disk fixed connection, spiral reset spring drive first pressure disk when pushing away that the second pressure disk resets and move that resets to the vice removal of friction dorsad when the locking is relieved for throw off more easily completely when the differential locking is relieved between vice initiative friction disc of friction and the driven friction disc, still have the friction after avoiding the differential locking to relieve, reset spring comprises the less spiral spring of a plurality of diameters simultaneously, has saved structural space, has also increaseed the ability of return.
In the differential assembly, the circumferential side surface of the first pressure plate and/or the second pressure plate is a cylindrical side surface in clearance fit with the inner wall of the differential housing, and a guide belt matched with the inner wall of the differential housing is arranged on the cylindrical side surface. Set up the guidance tape, the guidance tape plays the supporting role and prevents the pressure disk axial motion when rubbing each other with poor shell, improves product reliability by a wide margin.
In the differential assembly, the end face of the spring mounting part facing the second pressure plate is provided with a plurality of counter bores, and one end of each spiral return spring is located in the corresponding counter bore.
In the differential assembly, a thrust bearing is arranged between the second end face of the second pressure plate and the piston of the locking oil cylinder.
In the differential mechanism assembly, the fastening component comprises a pin bush and a locking bolt, the two axial ends of the pin bush are respectively in contact connection with the second end face of the first pressure plate and the first end face of the second pressure plate, the locking bolt penetrates through the inner hole of the pin bush to connect the first pressure plate and the second pressure plate in a locking mode, and the axial size of the pin bush is larger than that of the spring mounting portion.
In the differential assembly, the spring mounting portion is an annular rib plate taking the center of the half shaft as an axis, and the spring mounting portion is provided with a pin bush avoiding hole for the pin bush to pass through.
The utility model discloses a realize that the technical scheme of its purpose is like: a drive axle is constructed that features the differential assembly described above.
Compared with the prior art, the utility model discloses in differential mechanism assembly and transaxle, throw off more easily completely when the differential locking is relieved between vice initiative friction disc of friction and the driven friction disc, still have the friction after avoiding the differential locking to relieve, reset spring comprises the less coil spring of a plurality of diameters simultaneously, has saved the structure space, has also increaseed the ability of return.
Drawings
FIG. 1 is a schematic view of a prior art differential assembly.
Fig. 2 is a schematic structural view of the differential assembly of the present invention.
Part names and serial numbers in the figure:
the differential gear comprises a differential case 10, a left case 11, a middle case 12, a right case 13, a side gear 14, a bevel gear 15, a spring mounting part 16, a cross shaft 17, a friction pair 20, a pressure plate 31, a shaft sleeve 32, a return spring 33, a first pressure plate 34, a second pressure plate 35, a spiral return spring 36, a first guide belt 37, a second guide belt 38, a locking bolt 39, a pin sleeve 51, a spline sleeve 52, a locking oil cylinder 40, a piston 41, an oil cylinder case 42 and a thrust bearing 43.
Detailed Description
The following description of the embodiments refers to the accompanying drawings.
As shown in fig. 2, the differential assembly in the present embodiment includes a differential and a differential lock, and is generally used for a drive axle of a construction machine.
The differential case is mainly composed of a left case 11, a middle case 12 and a right case 13, wherein the middle case 11, the right case 12 and the left case 13 are fixedly combined through bolts. The left shell 11 is rigidly connected with a driven spiral bevel gear (not shown in the figure), a cross 17 is arranged in an inner cavity formed by the left shell 11 and the middle shell 12, the cross 17 is in fit connection with a bevel gear 15 through a shaft hole, the bevel gear 15 can freely rotate around the axis of the cross 17, the bevel gear 15 is meshed with left and right side gears 14, and the left and right side gears 14 are correspondingly connected with left and right half shafts (not shown in the figure) through splines.
As shown in figure 1, power is transmitted to a differential shell through a driving spiral bevel gear and a driven spiral bevel gear and drives the differential shell to rotate, the differential shell drives a cross shaft 17, the cross shaft 17 drives a bevel gear 15, the bevel gear 15 is simultaneously meshed with a left half shaft gear 14 and a right half shaft gear 14 to transmit power to the left half shaft and the right half shaft, the bevel gear 15 not only revolves around the axis of the left half shaft and the axis of the right half shaft, when the rotating speeds of the left tire and the right tire are different, the bevel gear also rotates around the axis of the cross shaft, and the differential function of the left tire and the right tire is realized.
As shown in fig. 2, a friction pair 20 and a spline housing 52 are provided in an inner cavity formed by the middle case 12 and the right case 13, and the friction pair is formed by a driving friction plate and a driven friction plate. The outer circle wall surface of the spline housing 52 is provided with an external spline connected with the driven friction plate, and the inner hole wall surface is provided with an internal spline connected with the right half shaft.
As shown in fig. 2, a friction pair 20 is installed between the spline housing 52 and the inner wall surface of the right housing, a driving friction plate is installed on the inner wall surface of the right differential housing 13 and connected by a spline, and a driven friction plate is installed on the spline housing 52.
The jacking assembly comprises a plurality of spiral return springs 36, a first pressure plate 34 and a second pressure plate 35.
The first pressure plate 34 and the second pressure plate 35 are coaxially arranged with the right half shaft and fixedly connected through a fastening assembly, a first end face of the first pressure plate 34 is adjacent to the friction pair, a second end face of the first pressure plate 34 is adjacent to a first end face of the second pressure plate 35, a second end face of the second pressure plate 35 can be pushed by a piston of the locking oil cylinder to axially move along the half shaft, and a thrust bearing 43 is arranged between the second end face of the second pressure plate 35 and a piston 41 of the locking oil cylinder 40.
The right shell is provided with a spring mounting part 16 which radially protrudes into a gap between the first pressure plate 34 and the second pressure plate 35, the spring mounting part 16 is an annular ribbed plate taking the center of a half shaft as an axis, the end face, facing the second pressure plate 35, of the spring mounting part 16 is provided with a plurality of counter bores, one end of each spiral reset spring 36 is located in the corresponding counter bore, and the other end of each spiral reset spring 36 is in contact connection with the second pressure plate.
The circumferential side surfaces of the first pressure plate 34 and the second pressure plate 35 are cylindrical side surfaces which are in clearance fit with the inner wall of the right shell 13, a first guide belt 37 which is matched with the inner wall of the right shell 13 is arranged on the cylindrical side surface of the first pressure plate 34, and a second guide belt 38 which is matched with the inner wall of the right shell 13 is arranged on the cylindrical side surface of the second pressure plate 35. Set up the guidance tape, the guidance tape plays supporting role and prevents the pressure disk axial motion when with the looks mutual friction of poor shell, improves product reliability by a wide margin.
The fastening assembly comprises a pin bush 51 and a locking bolt 39, wherein the two axial ends of the pin bush 51 are respectively in contact connection with the second end face of the first pressure plate 34 and the first end face of the second pressure plate 35, the locking bolt 39 penetrates through an inner hole of the pin bush 51 to tightly connect the first pressure plate 34 and the second pressure plate 35, and the axial dimension of the pin bush 51 is larger than that of the spring mounting part 16. The spring mounting portion 16 is provided with a pin bush escape hole through which the pin bush 51 passes.
The locking oil cylinder 40 mainly comprises a piston 41 and an oil cylinder shell 42, the oil cylinder shell 42 and a shell of the drive axle are relatively fixed, after the differential lock is jointed with hydraulic oil, the hydraulic oil pushes the piston to move towards a friction pair direction, and pushes a first pressure plate and a second pressure plate to compress the friction pair, so that the differential lock is jointed, friction torque is generated between a driving friction plate and a driven friction plate of the friction pair, the friction torque is transmitted to a right half axle through a spline sleeve, the right half axle and the differential lock shell are connected into a whole, at the moment, a right half axle gear connected with the right half axle through a spline and the differential shell do not move relatively, a bevel gear does not move relatively, a left half axle gear and a right half axle gear do not rotate relatively, and the left half axle and the right half axle are connected into a whole, so that a half axle locking function is realized.
After the pressure of the hydraulic oil is cancelled, the piston resets under the action of the spiral return spring 25 in the pushing assembly, the pressure acting on the friction pair is eliminated, the driving friction plate and the driven friction plate are separated from contact, and the locking of the differential lock is released.
The utility model discloses in, first pressure disk and second pressure disk fixed connection, spiral reset spring drives first pressure disk and moves the removal that resets to the vice removal of friction dorsad when the locking is relieved that spiral reset spring promotes the second pressure disk and resets for throw off more easily when the differential locking is relieved between vice initiative friction disc of friction and the driven friction disc, still have the friction after avoiding the differential locking to relieve, reset spring comprises the less spiral spring of a plurality of diameters simultaneously, the structure space has been saved, the ability of return has also been increaseed.
Claims (7)
1. A differential mechanism assembly comprises a differential mechanism and a differential lock, wherein the differential lock comprises a friction pair, a jacking component, a locking oil cylinder and a spline housing for spline connection with a half shaft, the spline housing and the friction pair are positioned in a differential mechanism shell, and the friction pair is in spline connection with the differential mechanism shell and the spline housing; the locking oil cylinder is positioned outside the differential shell;
the pressing component comprises a plurality of spiral reset springs, a first pressing plate and a second pressing plate;
the first pressure plate and the second pressure plate are coaxially arranged with the half shaft and fixedly connected through a fastening assembly, the first end face of the first pressure plate is adjacent to the friction pair, the second end face of the first pressure plate is adjacent to the first end face of the second pressure plate, and the second end face of the second pressure plate can be pushed by a piston of the locking oil cylinder to axially move along the half shaft;
the shell is provided with a spring mounting part which radially protrudes into a gap between the first pressure plate and the second pressure plate, each spiral reset spring is arranged around the circumference of the half shaft, one end of each spiral reset spring is connected with the spring mounting part, and the other end of each spiral reset spring is connected with the second pressure plate.
2. The differential assembly as defined in claim 1 wherein said circumferential side of said first pressure plate and/or said second pressure plate is a cylindrical side in clearance fit with an inner wall of said differential case, said cylindrical side having a guide band disposed thereon in clearance fit with said inner wall of said differential case.
3. The differential assembly of claim 1 wherein the end of the spring mounting portion facing the second pressure plate is provided with a plurality of counter bores, one end of each of the helical return springs being located in a corresponding counter bore.
4. The differential assembly of claim 1 wherein a thrust bearing is disposed between the second end surface of the second pressure plate and the piston of the lock cylinder.
5. The differential assembly according to any one of claims 1 to 4, wherein the fastening member includes a pin bush and a locking bolt, both axial ends of the pin bush are respectively in contact connection with the second end surface of the first pressure plate and the first end surface of the second pressure plate, the locking bolt passes through an inner hole of the pin bush to lock and connect the first pressure plate and the second pressure plate, and the axial dimension of the pin bush is greater than that of the spring mounting portion.
6. The differential assembly according to claim 5, wherein the spring mounting portion is an annular rib plate having a center of the axle shaft as an axis, and the spring mounting portion is provided with a pin bush relief hole through which the pin bush passes.
7. A drive axle characterized by the differential assembly of any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221019511.4U CN217422094U (en) | 2022-04-29 | 2022-04-29 | Differential assembly and drive axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221019511.4U CN217422094U (en) | 2022-04-29 | 2022-04-29 | Differential assembly and drive axle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217422094U true CN217422094U (en) | 2022-09-13 |
Family
ID=83186007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221019511.4U Active CN217422094U (en) | 2022-04-29 | 2022-04-29 | Differential assembly and drive axle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217422094U (en) |
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2022
- 2022-04-29 CN CN202221019511.4U patent/CN217422094U/en active Active
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