CN210034328U - Differential mechanism of differential lock of engineering machinery - Google Patents
Differential mechanism of differential lock of engineering machinery Download PDFInfo
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- CN210034328U CN210034328U CN201920553993.3U CN201920553993U CN210034328U CN 210034328 U CN210034328 U CN 210034328U CN 201920553993 U CN201920553993 U CN 201920553993U CN 210034328 U CN210034328 U CN 210034328U
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- differential
- transition sleeve
- pressure plate
- piston
- end cover
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Abstract
The utility model discloses an engineering machinery differential lock differential mechanism, which comprises a spline housing, a pressure plate, a friction plate group, a transition housing, a reset spring assembly, an end cover and a piston which can axially move, wherein the spline housing, the pressure plate, the friction plate group, the transition housing, the reset spring assembly and the end cover are arranged on one half shaft of the differential mechanism; the inner surface of the spline housing can be meshed with the half shaft, and the outer surface of the spline housing can be meshed with the friction plate set; an end cover is arranged on the outer side of the pressure plate and fixedly connected with the differential shell; the center of the end cover is provided with an inner hole for accommodating the half shaft and the transition sleeve; one end surface of the transition sleeve is adjacent to the pressure plate, and the other end surface of the transition sleeve can be pushed by the piston to move axially along the half shaft; a plurality of stepped holes used for installing the reset spring assembly are formed in the end cover, and through holes are formed in corresponding positions on the pressure plate and the transition sleeve in the axial direction of the stepped holes. The scheme skillfully utilizes the space of the inner cavity of the shell, arranges parts and has compact structure; through friction disc group and spline housing meshing, rigidity impact when avoiding the locking. The transition sleeve and the rod are driven by the reset spring to rapidly separate the pressure plate from the friction plate, so that rapid unlocking is realized.
Description
Technical Field
The utility model relates to an engineering machine tool differential lock differential mechanism belongs to loader technical field.
Background
The drive axle of the loader is provided with a differential mechanism which can allow the left and right wheels to rotate at different speeds, but when the wheel on one side idles, the wheel on the other side on a good road surface cannot obtain torque, and the loader loses the driving power. In which case the differential is disabled. In order to improve the passing capacity of the loader on a slippery road surface, a differential needs to be locked, wheels on two sides of a drive axle can become rigidly connected, most of torque or even all of torque can be transmitted to the wheels which do not slip, and therefore the machine can generate enough traction force to continue running.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned problem, the utility model provides an engineering machine tool differential lock differential mechanism skids side half shaft gear through wet braking, makes transmission torque redistribution to opposite side, and opposite side wheel limit obtains power to make the machine can continue to travel.
In order to realize the purpose, the utility model discloses a technical scheme is:
a differential mechanism of an engineering mechanical differential lock comprises a spline housing, a pressure plate, a friction plate group, a transition housing, a return spring assembly, an end cover and a piston which can axially move, wherein the spline housing, the pressure plate, the friction plate group, the transition housing, the return spring assembly, the end cover and the piston are arranged on one half shaft of the differential mechanism;
the inner surface of the spline housing is provided with an internal spline which can be meshed with an external spline on the outer surface of the half shaft, and the outer surface of the spline housing is provided with an external spline which can be meshed with the friction plate set;
the spline housing and the friction plate set are surrounded by the space between the pressure plate and the differential shell; an end cover is arranged on the outer side of the pressure plate and fixedly connected with the differential shell; the center of the end cover is provided with an inner hole capable of accommodating the half shaft and the transition sleeve;
one end face of the transition sleeve is adjacent to the pressure plate, and the other end face of the transition sleeve can be pushed by the piston to move axially along the half shaft;
the end cover is provided with a plurality of stepped holes for mounting the reset spring assembly, and through holes are formed in the corresponding positions of the pressure plate and the transition sleeve in the axial direction of the stepped holes;
the reset spring assembly comprises a rod and a reset spring sleeved on the rod, wherein two ends of the rod respectively penetrate through holes in the same axial direction of the pressure plate and the transition sleeve, and are respectively limited in the space between the pressure plate and the friction plate set and the space between the transition sleeve and the piston by limiting parts.
Further, the reset spring assembly keeps the transition sleeve and the thrust bearing tightly attached all the time. The reset spring assembly always keeps the pressure plate tightly attached to the transition sleeve.
Further, the friction plate group comprises driven plates and friction plates which are arranged at intervals;
furthermore, a driven plate is in contact with the differential shell, and a friction plate is in contact with the end face of the pressure plate side.
Further, the other end face of the transition sleeve is connected with the piston through a thrust bearing. One end face of the thrust bearing is always attached to the end face of the piston, and the other end face of the thrust bearing is always attached to the end face of the transition sleeve.
Further, the piston is hermetically mounted in the housing by a piston oil seal.
Further, the hydraulic oil enters a gap between the piston and the housing through an oil passage arranged on the housing.
Furthermore, an oil groove is formed on the transition sleeve.
Furthermore, a bearing is respectively arranged on the end cover and the differential shell to support the differential to rotate under the action of power.
Furthermore, a thrust bearing is arranged between the piston and the transition sleeve, and the axial clearance of the thrust bearing is 0, so that the accurate working stroke of the piston can be ensured. And simultaneously, the requirement that the transition sleeve rotates along with the differential shell is met.
Furthermore, the differential left shell and the differential right shell are fixed into a whole through a connecting piece after being involuted, and a cross shaft, a planet wheel and a half axle gear are arranged in the inner space of the differential left shell and the differential right shell.
Further, the transition sleeve has the following dimensional relationships with the end cover and the pressure plate:
l is more than or equal to L1 plus the initial stroke of the piston,
in the formula, L is the axial length between the surface of the transition sleeve, which is located towards the end cover and is provided with the through hole, and the surface of the transition sleeve, which is contacted with the pressure plate; l1 is the axial length dimension of the stepped bore in the end cap.
The utility model discloses the beneficial effect who reaches:
hydraulic oil enters the pushing piston through an oil duct formed in the shell, the thrust bearing, the transition sleeve and the pressure plate are pushed through the piston, and the friction plate is pressed tightly, so that the spline sleeve and the half axle gear stop rotating, and the half axle gear on the other side obtains torque. The space of the inner cavity of the shell is skillfully utilized, parts are distributed, and the structure is compact. By engaging the driven plate 12 and the friction plate 11 with the spline housing, rigid impact during locking is avoided. The transition sleeve and the rod are driven by the reset spring to rapidly separate the pressure plate from the friction plate, so that rapid unlocking is realized. The thrust bearing is utilized, so that the axial displacement of the piston can be effectively transmitted, and the rotation requirement of the differential can be assisted.
Drawings
Fig. 1 is a schematic cross-sectional view of a differential mechanism of a differential lock of an engineering machine according to the present invention.
Fig. 2 is a schematic cross-sectional view of a return spring assembly in the differential of the differential lock of the engineering machine according to the present invention.
Fig. 3 is a schematic view of a rod in a differential of a differential lock of an engineering machine according to the present invention.
Fig. 4 is a schematic view of a transition sleeve in the differential mechanism of the differential lock of the engineering machine of the present invention.
Fig. 5 is a schematic view of an end cover in the differential mechanism of the differential lock of the engineering machinery of the present invention.
Fig. 6 is a schematic diagram showing the size relationship between the transition sleeve and the transition sleeve in the differential mechanism of the differential lock of the engineering machinery of the present invention.
In the figure: 1. the device comprises a shell, 2, a piston oil seal, 3, a piston, 4, a thrust bearing, 5, a transition sleeve, 6, a bolt II, 7, a bearing I, 8, a return spring assembly, 9, an end cover, 10, a pressure plate, 11, a friction plate, 12, a driven plate, 13, a spline sleeve, 14, a differential left shell, 15, a cross shaft, 16, a planet wheel, 17, a planet wheel gasket, 18, a bolt I, 19, a half shaft gear, 20, a half shaft gear gasket, 21, a differential right shell, 22, a bearing II, 23, an inner hole, 24, a stepped hole, 25, a flange plane, 26, a return spring, 27, a rod, 28, a split pin, 29 and a through hole.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in the figures 1 to 4, the utility model discloses an engineering machinery differential lock differential mechanism, including establishing spline housing 13, pressure disk 10, friction disc 11, driven plate 12, transition cover 5, reset spring subassembly 8 and the end cover 9 on one of them semi-axis of differential mechanism.
The differential left shell 14 and the differential right shell 21 are fixed into a whole by bolts I18 after being involuted, and a cross shaft 15, a planet wheel 16, a planet wheel gasket 17, a side gear 19 and a side gear gasket 20 are arranged in the inner space of the differential left shell and the differential right shell. A spline housing 13 which can be meshed with an external spline on the half shaft is sleeved on the half shaft sleeved on the differential left shell 14, and the external surface of the spline housing 13 is provided with an external spline.
The spline housing 13 is externally fitted with driven plates 12 and friction plates 11 fitted at intervals in the external spline clearance, and the driven plates 12 and friction plates 11 are surrounded by the space between the pressure plate 10 and the left differential case 14. Wherein, the driven plate 12 is contacted with the outer end face of the differential left shell 14, and the driven plate 12 is contacted with the end face of the pressure plate 10. Driven plates 12 and friction plates 11 are assembled at intervals, and 7 driven plates and 6 friction plates are assembled together in the embodiment, so that rigid impact during locking is avoided. The pressure plate 10 is arranged inside the end cover 9, the end cover 9 is coupled with the differential left shell 14 through bolts II6, and the driven plate 12, the friction plates 11, the spline sleeve 13 and the pressure plate 10 are limited in a space formed between the end cover 9 and the differential left shell 14. The end cap 9 has an internal bore 23 in the center thereof to prevent the end cap from contacting the shaft on which it is mounted. The transition sleeve 5 is mounted in the end cap bore 23 with one end surface abutting the pressure plate 10 and the other end surface abutting the thrust bearing 4, such that the transition sleeve 5 is axially movable and radially limited by the end cap 9 bore 23. The axial clearance of the thrust bearing 4 is always 0, and the accurate working stroke of the piston 3 can be ensured. And simultaneously meets the requirement that the transition sleeve 5 rotates along with the differential shell.
The end cover 9 is provided with a plurality of stepped holes 24 for installing the return spring assembly 8, and through holes are correspondingly arranged on the pressure plate 10 and the transition sleeve 5 in the axial direction corresponding to the stepped holes 24. Each set of return spring assembly 8 comprises a rod 27, a return spring 26 fitted over the rod 27, and a cotter pin 28, the rod 27 having a flange flat 25 at one end and a small through hole at the other end for fitting the cotter pin 28. The cotter 28 and the flange flat 25 are both for limiting the ends of the rod 27 without departing from the through holes 29 on the transition sleeve 5 and the pressure plate 10, and in other embodiments, the cotter 28 and the flange flat 25 can be replaced by limiting parts of other structures or components.
The rod 27 passes through a stepped hole in the end cap 9 and corresponding through holes 29 in the pressure plate 10 and transition piece 5 so that one end with the flange flat 25 is located in the space between the pressure plate 10 and friction plate 11 and the other end with a small through hole passes through a hole in the transition piece 5 to be secured by a cotter pin 28. The return spring 26 sleeved on the rod 27 can be compressed in the stepped hole by the transition sleeve 5, and when the transition sleeve 5 compresses the return spring 26 to move, the transition sleeve 5 pushes the pressure plate 10 to move towards the friction plate 11, or the return force of the return spring 26 ejects the transition sleeve 5 outwards, and the transition sleeve 5 further drives the flange plane 25 on the rod 27 to draw the pressure plate 10 to move towards the direction far away from the friction plate 11, so that the pressure plate 10 and the friction plate 11 are quickly separated.
And the bearing I7 and the bearing II 22 are respectively arranged at the two ends of the end cover 9 and the right differential shell 21 and support the differential to rotate under the action of power. The piston 3 is provided with piston oil seals 2 at two ends and is hermetically arranged in the shell 1 through the piston oil seals 2. A thrust bearing 4 is arranged between the piston 3 and the transition sleeve 5, so that the transition sleeve 5 and the piston 3 can rotate relatively. And a thrust bearing 4 is used, the axial clearance of the thrust bearing is 0, and the working stroke of the precise piston 3 is ensured.
As shown in fig. 5 and 6, the transition sleeve 5 has the following dimensional relationships with the end cap 9 and the pressure plate 10:
l is more than or equal to L1 plus the initial stroke of the piston,
in the formula, L is the axial length between the surface of the transition sleeve 5 facing the end cover, where the through hole 29 is located, and the surface of the transition sleeve 5 contacting the pressure plate 10; l1 is the axial length dimension of the stepped bore 24 in the end cap 9.
An oil groove is formed in the outer circle of the transition sleeve 5, so that an oil film is generated in the movement process to lubricate the transition sleeve.
When slipping occurs, hydraulic oil enters through the oil passage of the housing 1, and pushes the piston 3. The piston 3 pushes the transition sleeve 5 through the thrust bearing 4, and the transition sleeve 5 pushes the pressure plate 10 to press the driven plate 12 and the friction plate 11. Because the external splines on the spline housing 13 are meshed with the friction plate 11 and the internal splines are meshed with the external splines on the half shafts, when the friction plate 11 is stressed, the spline housing 13 and the half shafts are limited, the left and right half shaft gears are not subjected to differential speed any more and become rigidly connected, and therefore differential locking is realized.
When the lock is unlocked, hydraulic oil is unloaded, the piston 3 loses the thrust action, the transition sleeve 5 is popped out outwards under the restoring force action of the return spring 26 and is separated from the pressure plate 10, so that the pressure plate 10 is not pressed to the friction plate 11 any more, the transition sleeve 5 further drives the flange plane 271 on the rod 27 to clamp and pull the pressure plate 10 to move in the direction away from the friction plate 11, and the pressure plate 10 is quickly separated from the friction plate 11. The friction plate 11 and the external spline on the spline housing 13 are not meshed any more, the spline housing 13 and the half shaft are released from limitation, and the left and right half shaft gears are unlocked.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (10)
1. A differential mechanism of an engineering mechanical differential lock is characterized by comprising a spline sleeve, a pressure plate, a friction plate group, a transition sleeve, a return spring assembly, an end cover and a piston which can axially move, wherein the spline sleeve, the pressure plate, the friction plate group, the transition sleeve, the return spring assembly, the end cover and the piston are arranged on one half shaft of the differential mechanism;
the inner surface of the spline housing is provided with an internal spline which can be meshed with an external spline on the outer surface of the half shaft, and the outer surface of the spline housing is provided with an external spline which can be meshed with the friction plate set;
the spline housing and the friction plate set are surrounded by the space between the pressure plate and the differential shell; an end cover is arranged on the outer side of the pressure plate and fixedly connected with the differential shell; the center of the end cover is provided with an inner hole capable of accommodating the half shaft and the transition sleeve;
one end face of the transition sleeve is adjacent to the pressure plate, and the other end face of the transition sleeve can be pushed by the piston to move axially along the half shaft;
the end cover is provided with a plurality of stepped holes for mounting the reset spring assembly, and through holes are formed in the corresponding positions of the pressure plate and the transition sleeve in the axial direction of the stepped holes;
the reset spring assembly comprises a rod and a reset spring sleeved on the rod, wherein two ends of the rod respectively penetrate through holes in the same axial direction of the pressure plate and the transition sleeve, and are respectively limited in the space between the pressure plate and the friction plate set and the space between the transition sleeve and the piston by limiting parts.
2. The differential of the differential lock of the engineering machinery as claimed in claim 1, wherein the friction plate set comprises a driven plate and a friction plate which are arranged at intervals.
3. The differential of the differential lock of construction machinery as claimed in claim 2, wherein the driven plate and the friction plate are arranged at a distance, the driven plate is in contact with the differential case, and the driven plate is in contact with the side end face of the pressure plate.
4. The differential with the engineering mechanical differential lock as claimed in claim 1, wherein a thrust bearing is arranged between the other end surface of the transition sleeve and the piston.
5. The differential of the differential lock of engineering machinery as claimed in claim 1, wherein the piston is hermetically installed in the housing by a piston oil seal.
6. The differential of the engineering mechanical differential lock as claimed in claim 1, wherein the hydraulic oil enters the gap between the piston and the housing through an oil passage provided in the housing.
7. The differential of the differential lock of the engineering machinery as claimed in claim 1, wherein the transition sleeve is provided with an oil groove.
8. The differential with differential lock of engineering machinery as claimed in claim 1, wherein the end cap and the differential housing are respectively provided with a bearing for supporting the differential to rotate under power.
9. The differential mechanism with the engineering mechanical differential lock as claimed in claim 1, wherein the left differential case and the right differential case are fixed into a whole through a connecting piece after being involuted, and a cross shaft, a planet wheel and a side gear are arranged in the inner space of the differential mechanism.
10. The differential mechanism of the engineering mechanical differential lock of claim 1, wherein the transition sleeve has the following dimensional relationships with the end cover and the pressure plate:
l is more than or equal to L1 plus the initial stroke of the piston,
in the formula, L is the axial length between the surface of the through hole on the transition sleeve, which faces the end cover, and the surface of the transition sleeve, which is in contact with the pressure plate; l1 is the axial length dimension of the stepped bore in the end cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920553993.3U CN210034328U (en) | 2019-04-23 | 2019-04-23 | Differential mechanism of differential lock of engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920553993.3U CN210034328U (en) | 2019-04-23 | 2019-04-23 | Differential mechanism of differential lock of engineering machinery |
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| Publication Number | Publication Date |
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| CN210034328U true CN210034328U (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920553993.3U Active CN210034328U (en) | 2019-04-23 | 2019-04-23 | Differential mechanism of differential lock of engineering machinery |
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| CN (1) | CN210034328U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110094478A (en) * | 2019-04-23 | 2019-08-06 | 徐州徐工传动科技有限公司 | A kind of engineering machinery differential lock differential mechanism |
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2019
- 2019-04-23 CN CN201920553993.3U patent/CN210034328U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110094478A (en) * | 2019-04-23 | 2019-08-06 | 徐州徐工传动科技有限公司 | A kind of engineering machinery differential lock differential mechanism |
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