CN214404578U

CN214404578U - Differential mechanism and vehicle

Info

Publication number: CN214404578U
Application number: CN202120252102.8U
Authority: CN
Inventors: 崔瑾; 高峰; 刘彦甫; 孙鹏飞; 韩川波; 杜柳絮
Original assignee: Honeycomb Transmission Technology Hebei Co Ltd
Current assignee: Honeycomb Transmission Technology Hebei Co Ltd
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-10-15
Anticipated expiration: 2031-01-28

Abstract

The utility model relates to a vehicle transmission provides a differential mechanism, including differential mechanism casing and planet gear axle, the tip of planet gear axle is equipped with the movable block with the clearance fit department of differential mechanism casing, and the tip both sides of planet gear axle all are equipped with the movable block, are equipped with liquid passage on the differential mechanism casing, and the movable block can remove the liquid medium flow in order to promote liquid passage, is equipped with the damping hole that is used for forming pressure differential on the liquid passage to make the liquid medium in the liquid passage can the reaction on the movable block. Furthermore, the utility model discloses still relate to a vehicle. Differential mechanism can effectively solve the gear that the in-process of shifting produced and strike noise problem.

Description

Differential mechanism and vehicle

Technical Field

The utility model relates to a vehicle transmission equipment, in particular to differential mechanism. Furthermore, the utility model discloses still relate to a vehicle.

Background

Nowadays, parallel shaft type transmissions are equipped with differentials, which mainly consist of a differential ring gear, a differential case, planetary gears, side gears, planetary gear shafts, spacers, and positioning pins, and do not have a buffer device. The differential gear ring is meshed with a main reduction gear of an output shaft of the planetary shaft system to transmit power. In the gear shifting process, particularly in the process of quickly stepping on and quickly releasing the accelerator, the tooth surface is knocked due to the sudden change of the torque, knocking noise is generated, and the noise is small due to different brands and technical level difference.

The transmission on the market at present tends to be lightweight, and whole case compactness is higher and higher, and whole case size is little, does not have the independent damper of extra spatial arrangement to be used for reducing the flank of tooth knocking noise. Although the tooth surface knocking noise can be improved through gear reshaping, the noise can be effectively improved only through repeated design of reshaping-testing-reshaping-testing in the research and development stage, the requirement on reshaping precision is high, and the development period is long.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a differential mechanism to effectively solve the gear that the in-process of shifting produced and strike noise problem.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the utility model provides a differential mechanism, includes differential mechanism casing and planet gear axle, the tip of planet gear axle with the clearance fit department of differential mechanism casing is equipped with the movable block, just the tip both sides of planet gear axle all are equipped with the movable block, be equipped with liquid passage on the differential mechanism casing, the movable block can remove in order to promote liquid medium in the liquid passage flows, be equipped with the damping hole that is used for forming pressure differential on the liquid passage, so that liquid medium in the liquid passage can the reaction be in on the movable block.

Further, the planet gear shaft has two end portions connected to the differential case, and the liquid passage is provided between the moving blocks located on the same side of the two end portions.

Furthermore, a plug connector used for blocking the liquid channel is arranged on the differential shell, and the plug connector is provided with damping holes communicated with the liquid channels on the two sides of the plug connector.

Furthermore, the contact surface of the moving block and the planet gear shaft is an arc surface.

Furthermore, a slideway is radially arranged in the differential case along the end part of the planet gear shaft, the moving block is slidably arranged in the slideway, and the liquid channel is communicated with the slideway.

Further, the damping hole is located at the middle position of the liquid channel.

Furthermore, a through hole for the end part of the planet gear shaft to pass through is formed in the differential shell, and the end part of the planet gear shaft is in clearance fit with the through hole; the tip of planetary gear axle with the differential mechanism casing is through round pin hub connection, the differential mechanism casing with the tip of planetary gear axle all be equipped with round pin axle matched with round pin axle hole, the round pin axle with round pin axle hole on the differential mechanism casing is interference fit, and with round pin axle hole on the planetary gear axle is clearance fit.

Further, the liquid medium is oil or lubricating grease.

Furthermore, the differential case is internally and symmetrically provided with half-axle gears, the planet gear shafts are symmetrically provided with planet gears capable of being in meshing transmission with the half-axle gears, two end parts of the planet gear shafts are arranged on the differential case, the central axis of the planet gear shafts is perpendicular to the central axis of the half-axle gears, and the differential case is fixedly provided with a gear ring.

Compared with the prior art, differential mechanism have following advantage:

(1) the differential mechanism of the utility model is provided with the moving block, the liquid channel and the damping hole, so that the planet gear shaft can be buffered by the hydraulic medium in the liquid channel in the torque change process of the differential mechanism, thereby playing a role in damping the differential mechanism, and the hydraulic damping structure is simple, low in cost, high in reliability and long in service life, and can effectively solve the problem of gear knocking noise generated in the gear shifting process;

(2) the differential mechanism of the utility model only needs to modify the traditional differential mechanism, integrates the hydraulic damping structure on the basis of the traditional differential mechanism, has unchanged torque transmission capability, does not need to change the design space, and is convenient to carry;

(3) differential mechanism to the profile modification required precision of flank of tooth reduce, can shorten research and development cycle, reduce the research and development cost.

Another object of the utility model is to provide a vehicle to effectively solve the gear that the vehicle shift in-process produced and strike noise problem.

a vehicle is provided with the differential mechanism.

The vehicle has the same advantages as the differential described above with respect to the prior art, and will not be described in detail here.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a front view of a differential according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along line E-E of FIG. 1;

FIG. 3 is an enlarged view of the structure of FIG. 2 at F;

FIG. 4 is a cross-sectional view taken along line D-D of FIG. 1;

FIG. 5 is an enlarged view of the structure at G in FIG. 4;

fig. 6 is a perspective view of a differential according to an embodiment of the present invention;

fig. 7 is a schematic view of the operation principle of the differential according to the embodiment of the present invention (in a non-operation state);

fig. 8 is a schematic view of the operating principle of the differential according to the embodiment of the present invention (in an operating state).

Description of reference numerals:

1 differential case 2 side gears

3 planetary gear 4 planetary gear shaft

5 gear ring 6 moving block

61 first moving block 62 second moving block

63 third moving block 64 fourth moving block

7 liquid channel 71 first liquid channel

72 second liquid passage 8 plug-in part

81 damping hole 9 connecting channel

Detailed Description

In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.

In addition, the damping hole 81 mentioned in the embodiment of the present invention refers to a kind of small hole in the hydraulic pipeline, and when there is no flow, the pressure is the same around the hole, and when there is liquid flow, because the small hole is installed in the thick hydraulic pipeline, the resistance is generated to the liquid flow when the liquid flows through the small hole, thereby generating the pressure difference around the hole.

The present invention will be described in detail with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1 to 6, the utility model provides a differential mechanism, including differential mechanism casing 1 and planet gear axle 4, the tip of planet gear axle 4 with the clearance fit department of differential mechanism casing 1 is equipped with movable block 6, just the tip both sides of planet gear axle 4 all are equipped with movable block 6, be equipped with liquid channel 7 on the differential mechanism casing 1, movable block 6 can remove in order to promote liquid medium in the liquid channel 7 flows, be equipped with the damping hole 81 that is used for forming pressure differential on the liquid channel 7, so that liquid medium in the liquid channel 7 can the reaction be in on the movable block 6.

Normally, the end of the pinion shaft 4 is in clearance fit with the differential case 1, and during gear shifting, torque is transmitted to the ring gear 5 of the differential via the output shaft, then to the differential case 1, then to the pinion shaft 4, and finally to the wheels via the side gear 2. The torque during the gear shift changes and the motion of the planet pins 4 lags behind the motion of the differential housing 1, causing gear rattle. In the current common passenger cars with the torque of 350Nm to 500Nm on the market, the differential mechanism transmits the torque in the range of 350Nm to 500Nm, and the stress of the planet gear shaft 4 is about 1 ten thousand newtons. By adding a damping device to the planet gear shaft 4, the impact caused during the torque transmission process can be damped. If a mechanical damping device is adopted in the design space of the traditional differential, the rigidity of the damper is very high (about 2000-5000N/mm), and the cost is high; if a damper with low rigidity is used, a larger design space is required, and the design purpose of miniaturization cannot be achieved.

The utility model discloses a hydraulic shock attenuation, the tip at planetary gear shaft 4 sets up movable block 6 with differential mechanism casing 1's clearance fit department, and planetary gear shaft 4's tip both sides all set up movable block 6, and change traditional differential mechanism casing, set up liquid channel 7 on differential mechanism casing 1, set up the damping hole 81 that is used for forming pressure differential on liquid channel 7, through the pressure differential that produces around damping hole 81, make the liquid medium in the liquid channel 7 can the reaction on movable block 6, thereby form cushioning effect to planetary gear shaft 4. During the torque change of the differential, the planet gear shaft 4 is buffered by the hydraulic medium, namely, the differential is damped. Compared with the traditional differential mechanism, the utility model discloses differential mechanism adopts the hydraulic shock attenuation, and hydraulic shock-absorbing structure is simple, and is with low costs, and the reliability is high, long service life, the gear that can effectively solve the in-process of shifting and produce strikes the noise problem to only need modify traditional differential mechanism, integrated hydraulic shock-absorbing structure on traditional differential mechanism's basis, the biography is turned round the ability unchangeably, need not to change the design space, conveniently carry on, the profile modification required precision reduces to the flank of tooth simultaneously, can shorten research and development cycle, reduce the research and development cost.

Specifically, the planet gear shafts 4 have two end portions connected to the differential case 1, and the liquid passage 7 is provided between the moving blocks 6 located on the same side of the two end portions, that is, the number of the planet gear shafts 4 is one, and the two end portions thereof are respectively connected to the differential case 1. Because the moving blocks 6 on the same side at two end parts of the planetary gear shaft 4 move in opposite directions under the action of the planetary gear shaft 4 in the moving process of the planetary gear shaft 4, the liquid channel 7 is arranged between the moving blocks 6 on the same side at two end parts of the planetary gear shaft 4, so that a liquid medium in the liquid channel 7 can flow in the liquid channel 7 under the pushing action of the moving blocks 6, and can flow through the damping holes 81 to generate pressure difference to form resistance, and the resistance acts on the moving blocks 6 in a reaction manner to play a buffering role for the planetary gear shaft 4.

Fig. 7 and 8 are schematic views illustrating the operation of the differential according to the embodiment of the present invention, wherein, in fig. 7, the planet gear shafts 4 are in a non-working state, moving blocks 6 are arranged at the joints of the two end parts of the planet gear shafts 4 and the differential case 1, and both sides of each end portion of the planetary gear shaft 4 are provided with moving blocks 6, which are a first moving block 61, a second moving block 62, a third moving block 63 and a fourth moving block 64, respectively, a liquid channel 7 is provided between the moving blocks 6 on the same side of both end portions of the planetary gear shaft 4, that is, as shown in fig. 7 and 8, the first moving block 61 and the third moving block 63 are located on the same side of both end portions of the planetary gear shafts 4, a first liquid passage 71 is provided between the first moving block 61 and the third moving block 63, the second moving block 62 and the fourth moving block 64 are located on the same side of both end portions of the planetary gear shafts 4, and a second liquid passage 72 is provided between the second moving block 62 and the fourth moving block 64. In fig. 8, the planet gear shafts 4 are in an operating state, and the arrows indicate the flow direction of the liquid medium in the liquid channel 7. During the movement, the planetary gear shafts 4 push the first moving block 61 and the fourth moving block 64 at the same time, so that the first moving block 61 and the fourth moving block 64 move in opposite directions, respectively. During the movement process of the first moving block 61, the liquid medium in the first liquid channel 71 is pushed to flow, when the liquid medium passes through the damping holes 81, a large pressure difference is generated, so that resistance is formed, and the resistance acts on the first moving block 61 in a reaction manner to play a role in buffering the planet gear shaft 4. Similarly, the fourth moving block 64 pushes the liquid medium in the second liquid channel 72 to flow during the movement process, and when the liquid medium passes through the damping holes 81, a large pressure difference is generated to form a resistance force, and the resistance force reacts on the fourth moving block 64 and also plays a role in buffering the planet gear shaft 4. Of course, the number of the planet gear shafts 4 can also be two, the two planet gear shafts 4 are arranged in a cross shape, the axes of the two planet gear shafts 4 are positioned on the same plane, the planet gears 3 are symmetrically arranged on each planet gear shaft 4, and both ends of each planetary gear shaft 4 are connected with the differential case 1, both ends of each planetary gear shaft 4 connected with the differential case 1 are provided with moving blocks 6, and a liquid channel 7 is arranged between the moving blocks 6 which are positioned at the same side of the two end parts of the same planet gear shaft 4, that is, two fluid passages 7 are provided for each of the planetary gear shafts 4, so that, when it is operated, the respective planetary gear shafts 4 can be also cushioned by the action of the moving block 6, the fluid passages 7 and the damping holes 81, and the working principle thereof is the same as that of the one planetary gear shaft 4 described above, and the description thereof is omitted.

Specifically, as shown in fig. 4 and 5, a plug 8 for blocking the liquid passage 7 is provided on the differential case 1, and the damping hole 81 communicated with the liquid passages 7 on both sides of the plug 8 is provided on the plug 8. When the differential gear is installed, firstly, a jack penetrating through the liquid channel 7 is arranged on the differential gear shell 1, then the plug connector 8 is installed in the jack in an interference mode, the liquid channel 7 is divided into two parts, the damping hole 81 is arranged on the plug connector 8, the two parts of the liquid channel 7 are communicated through the damping hole 81, when a liquid medium flows in the liquid channel 7, pressure difference can be generated through the damping hole 81, the planet gear shaft 4 is buffered, and the liquid channel 7 and the damping hole 81 are easier to process. The insertion hole may be provided in a direction parallel to the plane of the liquid passage 7, and then the plug 8 may be inserted into the insertion hole, or the insertion hole may be provided in a direction perpendicular to the plane of the liquid passage 7, and then the plug 8 may be inserted into the insertion hole, but of course, the insertion hole 8 may not be provided, and the damping hole 81 may be directly formed in the differential case 1, and the two portions of the liquid passage 7 may be formed first, and then the damping hole 81 communicating the two portions may be formed therebetween. Further, the liquid passage 7 is an arc-shaped passage, and the orifice 81 is located at the middle position of the liquid passage 7. The liquid medium is oil or lubricating grease. Since the differential is often in a high temperature state when it is in operation, when the liquid medium is grease, it can flow in the liquid passage 7 at high temperature.

Specifically, as shown in fig. 2 and 3, the contact surface between the moving block 6 and the planetary gear shaft 4 is an arc surface. Therefore, the moving block 6 is in surface contact with the planet gear shaft 4, so that the contact pressure is reduced, and a better buffering effect is realized.

Specifically, a slideway is radially arranged in the differential case 1 along the end part of the planet gear shaft 4, the moving block 6 is slidably mounted in the slideway, and the liquid channel 7 is communicated with the slideway through a connecting channel 9. Through setting up the slide, the installation of the movable block 6 of being convenient for movable block 6 can move in the slide when receiving the pushing action of planet gear axle 4 for movable block 6 simultaneously because liquid passage 7 is linked together with the slide, thereby can promote the liquid medium in the liquid passage 7 to flow when making movable block 6 move in the slide. Wherein the liquid medium is injected into the liquid channel 7 through the slideway opening in advance before the moving block 6 is mounted.

Specifically, the differential case 1 is provided with a through hole for the end of the planet shaft 4 to pass through, and the end of the planet shaft 4 is in clearance fit with the through hole, so that the planet shaft 4 can conveniently pass through the through hole into the differential case 1; the tip of planet gear axle 4 with differential mechanism casing 1 is through round pin hub connection, differential mechanism casing 1 with the tip of planet gear axle 4 all be equipped with round pin axle matched with round pin axle hole, the round pin axle with round pin axle hole on the differential mechanism casing 1 is interference fit, and with round pin axle hole on the planet gear axle 4 is clearance fit. Through setting up the round pin axle, can install planet gear axle 4 in differential mechanism casing 1, avoid it to deviate from in differential mechanism casing 1. Meanwhile, the end of the planet gear shaft 4 is in clearance fit with the through hole in the differential case 1, so that the coaxiality of the pin hole in the planet gear shaft 4 and the pin hole in the differential case 1 cannot be well maintained, when the pin shaft is installed, the pin shaft is inserted into the pin hole in the differential case 1 in an interference manner and is not easily inserted into the pin hole in the planet gear shaft 4, therefore, the pin shaft and the pin hole in the planet gear shaft 4 need to be in clearance fit, the pin shaft is easily inserted into the pin hole in the planet gear shaft 4, so that the assembly is easy, the processing precision can be reduced, and the production cost is reduced.

Specifically, as shown in fig. 1 and 6, side gears 2 are symmetrically disposed in the differential case 1, planetary gears 3 capable of meshing with the side gears 2 are symmetrically disposed on the planetary gear shafts 4, both end portions of the planetary gear shafts 4 are mounted on the differential case 1, the central axes of the planetary gear shafts 4 are perpendicular to the central axes of the side gears 2, and a ring gear 5 is fixed on the differential case 1. The gear ring 5 is used for inputting the power transmitted by the speed reducer, and the gear ring 5 is fixed on the differential case 1, so that the gear ring 5 rotates to drive the differential case 1 to rotate, the planetary gear shaft 4 rotates through the rotation of the differential case 1, and the half axle gear 2 rotates through the rotation of the planetary gear shaft 4, namely, the gear ring 5 transmits the power to the half axle through the differential case 1, the planetary gear shaft 4 and the half axle gear 2 in sequence, thereby transmitting the power to the wheels through the half axle. Further, the differential case 1 is divided into two parts, i.e., a first case and a second case, which are fastened together by bolts, both end portions of the pinion shaft 4 are mounted on the first case, the ring gear 5 is integrally formed on the second case, and the liquid passage 7 is provided at the joint of the first case and the second case, thereby facilitating the processing of the liquid passage 7.

The utility model also provides a vehicle, the vehicle is provided with foretell differential mechanism.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a differential mechanism, its characterized in that, includes differential mechanism casing (1) and planet gear axle (4), the tip of planet gear axle (4) with the clearance fit department of differential mechanism casing (1) is equipped with movable block (6), just the tip both sides of planet gear axle (4) all are equipped with movable block (6), be equipped with liquid passage (7) on differential mechanism casing (1), movable block (6) can remove in order to promote liquid medium in liquid passage (7) flows, be equipped with on liquid passage (7) and be used for forming damping hole (81) of pressure differential, so that liquid medium in liquid passage (7) can the reaction be in on the movable block (6).

2. Differential according to claim 1, characterized in that the planet shafts (4) have two ends connected to the differential housing (1), the liquid channel (7) being provided between the moving blocks (6) located on the same side of the two ends.

3. Differential according to claim 1, characterized in that the differential housing (1) is provided with a plug (8) for blocking the fluid channel (7), the plug (8) being provided with the damping holes (81) communicating with the fluid channels (7) on both sides thereof.

4. The differential according to claim 1, characterized in that the contact surface of the moving block (6) and the planet gear shaft (4) is a circular arc surface.

5. Differential according to claim 1, characterized in that a slideway is provided in the differential housing (1) radially along the end of the planet gear shaft (4), in which slideway the moving block (6) is slidably mounted, the liquid channel (7) being in communication with the slideway.

6. Differential according to claim 1, characterized in that the orifice (81) is located in the middle of the liquid channel (7).

7. Differential according to any one of claims 1 to 6, characterized in that the differential housing (1) is provided with through holes for the end portions of the planet pins (4) to pass through, the end portions of the planet pins (4) being in clearance fit with the through holes; the tip of planetary gear axle (4) with differential mechanism casing (1) is through the round pin hub connection, differential mechanism casing (1) with the tip of planetary gear axle (4) all be equipped with round pin axle matched with round pin axle hole, the round pin axle with round pin axle hole on differential mechanism casing (1) is interference fit, and with round pin axle hole on planetary gear axle (4) is clearance fit.

8. A differential according to any one of claims 1 to 6, wherein the liquid medium is oil or grease.

9. The differential gear according to any one of claims 1 to 6, characterized in that a side gear (2) is symmetrically arranged in the differential case (1), the planet gear shafts (4) are symmetrically provided with planet gears (3) capable of meshing with the side gear (2), both ends of the planet gear shafts (4) are mounted on the differential case (1), the central axes of the planet gear shafts (4) are perpendicular to the central axis of the side gear (2), and a ring gear (5) is fixed on the differential case (1).

10. A vehicle, characterized in that it is provided with a differential according to any one of claims 1 to 9.