CN202371108U

CN202371108U - Interaxial differential device

Info

Publication number: CN202371108U
Application number: CN2011205305084U
Authority: CN
Inventors: 刘四清; 杨刚; 刘固基
Original assignee: HUNAN ZHONGLIAN ZHONGKE AXLE CO Ltd
Current assignee: HUNAN ZHONGLIAN ZHONGKE AXLE CO Ltd; Hunan Zoomlion Special Vehicle Co Ltd
Priority date: 2011-12-16
Filing date: 2011-12-16
Publication date: 2012-08-08
Anticipated expiration: 2021-12-16

Abstract

The utility model provides an interaxial differential device, which includes a mounting casing (10), a differential lock (20) and a differential (30) arranged in the mounting casing (10), wherein the differential lock (20) includes an air cylinder (21), a sliding meshing sleeve (23), and a shift fork (22) connected between the air cylinder (21) and the sliding meshing sleeve (23) in a driving manner; the sliding meshing sleeve (23) is provided with a first working state that the sliding meshing sleeve is meshed with the differential (30), and a second working state that the sliding meshing sleeve (23) is separated from the differential (30); and the cylinder body (211) of the air cylinder (21) and the mounting casing (10) are integrally formed. According to the utility model, the interaxial differential device can effectively shorten the distance from the sliding meshing sleeve and a shift fork axis, simplifies the structure of the differential lock, improves the control accuracy of the shift fork, has a compact structure, is convenient to arrange and saves space.

Description

The shaft space difference speed device

Technical field

The utility model relates to vehicular field, in particular to a kind of shaft space difference speed device.

Background technique

The differential lock device of ransaxle generally adopts air-operated control at present, through in cylinder, charging into pressurized air, makes cylinder drive the motion of differential lock shift fork, promotes the sliding engaged cover and combines with the fixed engagement cover.The cylinder of work usefulness at present more adopts external hanging type to be installed on reducing gearbox or the axle housing, perhaps is fixed by bolts on reducing gearbox or the axle housing.

Outer fabricated differential lock cylinder; Need specialized designs to make cylinder block; Must be equipped with the flanged surface that is used to install cylinder on axle housing body or the reducer shell, and the axis that slides of sliding engaged cover and the distance of declutch shift shaft axis receive the restriction of cylinder block and cylinder mounting flange, apart from bigger; Cause the differential lock complex structure, take up space greatly, be unfavorable for the optimal design of part.

The model utility content

The utility model aims to provide a kind of shaft space difference speed device, can effectively reduce the distance between sliding engaged cover and the shift fork axis, simplifies the structure of differential lock, improves the control accuracy of shift fork, makes the shaft space difference speed apparatus structure compact, is convenient to arrange, saves the space.

To achieve these goals; An aspect according to the utility model; A kind of shaft space difference speed device is provided, has comprised and housing, differential lock are installed and are arranged on the differential mechanism of installing in the housing, differential lock comprises cylinder, sliding engaged cover and drives the shift fork that is connected between cylinder and the sliding engaged cover; The sliding engaged cover has first working state and second working state of separating with differential mechanism, the cylinder body of cylinder and mounting shell body by integral forming with the differential mechanism engagement.

Further, cylinder is fixedly installed on the housing inboard is installed.

Further, the piston rod of cylinder in axial direction is slidably disposed on to be installed in the housing, and shift fork is arranged on the piston rod, and is synchronized with the movement with piston rod.

Further, the periphery wall of sliding engaged cover is provided with circular groove along circumferential direction, and shift fork is fastened in the circular groove.

Further, the piston of cylinder in axial direction is arranged with piston ring and seal ring outward, and piston ring and seal ring are close to the inwall of cylinder body.

Further, shift fork is set on the piston rod, is threaded between shift fork and the piston rod.

Further, shift fork is the direct dialing fork, and the direct dialing fork is positioned on the same plane in the mounting point that sliding engaged puts with the direct dialing fork in the mounting point on the cylinder.

Further, housing being installed is reducer shell or ransaxle housing.

Further, piston rod is arranged with returning spring outward, and an end of this returning spring is connected on the step end face of piston rod, and the other end is connected on the madial wall that housing is installed.

Use the technological scheme of the utility model; The shaft space difference speed device comprises to be installed housing, differential lock and is arranged on the differential mechanism of installing in the housing; Differential lock comprises cylinder, sliding engaged cover and drives the shift fork that is connected between cylinder and the sliding engaged cover; The sliding engaged cover has first working state and second working state of separating with differential mechanism with the differential mechanism engagement, and cylinder comprises the cylinder body with the mounting shell body by integral forming.The cylinder of this programme comprises the cylinder body with the mounting shell body by integral forming, cylinder directly is fixedly connected with installing between the housing, and need add new auxiliary mounting structure; Saved being suitable for of component; And practiced thrift installing space, and make the structural configuration of installing in the housing compact more, the spacing between shift fork and the sliding engaged cover is littler; More easily the sliding engaged cover is controlled, control accuracy is higher.

Cylinder is arranged on that housing is installed is inboard, can avoid cylinder is arranged on external bring interfere with mounting shell external parts and cylinder is affected by the external environment and impaired problem easily of mounting shell, has improved the working life of cylinder.

Description of drawings

The accompanying drawing that constitutes the part of the utility model is used to provide the further understanding to the utility model, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:

Fig. 1 shows the structural representation according to the embodiment's of the utility model shaft space difference speed device.

Embodiment

Hereinafter will and combine embodiment to specify the utility model with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.

As shown in Figure 1, according to the embodiment of the utility model, the shaft space difference speed device comprises installs housing 10, differential lock 20, differential mechanism 30 and semiaxis 40.It is reducer shell or ransaxle housing that housing 10 is installed, and the embodiment in the utility model is that example is explained the shaft space difference speed device with the reducer shell.

Differential lock 20, differential mechanism 30 and semiaxis 40 all are arranged in the reducer shell, and differential lock 20 is positioned at reducer shell fully.Differential mechanism 30 is set in outside the semiaxis 40, can realize rotating synchronously through differential lock 20 between semiaxis 40 and the differential mechanism 30.The differential axle 30 near the end portion 40 of the valley key.

Differential lock 20 comprises cylinder 21, shift fork 22 and sliding engaged cover 23.Cylinder 21 comprises cylinder body 211, piston 212, piston rod 213, sleeve 214, piston ring 24 and seal ring 25.Cylinder body 211 is a boss structure, is arranged in the reducing gearbox intracoelomic cavity, forms with the reducer shell integrally casting, and links to each other with reducer shell.This boss structure has the cylindrical sliding cavity that holds piston 212, and piston 212 is slidably disposed in this cylindrical sliding cavity.The cylinder body 211 of cylinder 21 is one-body molded with the retarder shell, can save assembly in a large number, practice thrift installing space; Make the structure of differential lock 20 compact more; It is more reasonable to distribute, and also can make the between centers spacing between shift fork 22 and the sliding engaged cover 23 littler, is beneficial to accurate control more; Structure is simpler, and cost further reduces.

The outer wall of piston 212 in axial direction is arranged with piston ring 24 and seal ring 25, and piston ring 24 and seal ring 25 are close to the inwall setting of cylinder body 211, to the air cavity formation sealing of cylinder.Piston rod 213 is positioned at the afterbody of piston 212, and is slidably disposed in the retarder shell along the axial direction of piston 212.The periphery of piston rod 213 is arranged with returning spring 26, and first end of returning spring 26 is pressed on the end face of piston 212, and second end of returning spring 26 is pressed on the madial wall of retarder shell.

Differential lock in the present embodiment; Because cylinder 21 integral body are positioned at the retarder shell; Make cylinder 21 can not interfere by outer mounting structure with being arranged on the retarder shell; Also make cylinder 21 not be vulnerable to the influence of external environment condition and damage, effectively improved the working life of shaft space difference speed device, also more convenient cylinder 21 is installed.

In the middle of other embodiment; The cylinder body 211 of cylinder 21 also can be directly one-body molded at the outside and the retarder shell of retarder shell, owing to need not to use auxiliary connected element such as adpting flange, and therefore; Can reduce the distance between the axis of sliding engaged cover 23 and shift fork 22 effectively; Make the size of retarder shell and differential lock 20 compact more, be convenient to more arrange, effectively reduced taking the space.

Shift fork 22 is set on the outer wall of piston rod 213, and with piston rod 213 between be fixedly connected.Between shift fork 22 and seal ring 25, be provided with sleeve 214, first end of sleeve 214 is towards seal ring 25, and for seal ring 25 axially locating is provided, and second end is connected on the shift fork 22, for sleeve 214 axially locating is provided through shift fork 22.First end at sleeve 214 is provided with step hole; The periphery wall of piston rod 213 is provided with the step axle; Cooperate with this step hole,, make sleeve 214 can not form extruding seal ring 25 near seal ring 25 to the axially locating that sleeve 214 forms along seal ring 25 directions.Seal ring 25 can be lip-type packing or O RunddichtringO.For being threaded, piston rod 213 positions through the axial position of worm structure to shift fork 22 between the outer wall of shift fork 22 and piston rod 213.Also can be connected and locate between piston rod 213 and the shift fork 22 through realizations such as alignment pin.Shift fork 22 also can make and realize synchronous axial motion between shift fork 22 and the piston rod 213 through forming the location between bearing pin or connecting bolt etc. and the piston rod 213.Shift fork 22 is the direct dialing fork, and shift fork 22 is positioned on the same plane in mounting point on the cylinder 21 and the mounting point of shift fork 22 on sliding engaged cover 23.Direct dialing fork structure can be through directly processing acquisition to straight plate structure, and need not to forge or operation such as punching press, can effectively reduce operation, reduces production costs, and increases work efficiency.

Sliding engaged cover 23 is set in outside the semiaxis 40, and is connected through spline between the semiaxis 40, and can be along the axial direction slip of semiaxis 40.In axial direction be provided with circular groove 231 on the periphery wall of sliding engaged cover 23, the jaw of shift fork 22 is fastened in the circular groove 231, and sliding engaged cover 23 is formed axially locating, makes between sliding engaged cover 23 and the shift fork 22 and realizes synchronous axial motion.Sliding engagement with the sleeve 23 with the end of the differential 30 is provided with a keyway mating key grain, the slide 23 can engage the driving action of the cylinder 21 along the axial direction of the axle 30, to achieve the differential engaging a first operating state or the second operating state of separation, in order to achieve the operation of the axle 40 movements.

During operation, when the compressed air into the cylinder 21, the pressure, the piston 212 moves outwardly along its axis, the fork 22 is moved to drive and compress the return spring 26, the yoke 22 to drive the sliding engagement sleeve 23 along The axis of the axle 40 slide, when the sliding sleeve 23 sliding engagement to a certain position, the sliding sleeve 23 engages the keyway and differential 30 key grain combine to make the differential between the 30 and the axle 40 rigidly connected to the gear unit lockup.After discharging pressurized air, return spring 26 elastic return, promotion piston 212 returns initial positions, and drive shift fork 22 is got back to initial position with sliding engaged cover 23, the locking of releasing differential lock, retarder proper functioning.

From above description; Can find out; The utility model the above embodiments have realized following technique effect: the shaft space difference speed device comprises to be installed housing, differential lock and is arranged on the differential mechanism of installing in the housing; Differential lock comprises that cylinder, sliding engaged cover and driving are connected the shift fork between cylinder and the sliding engaged cover, and the sliding engaged cover has first working state and second working state of separating with differential mechanism with the differential mechanism engagement, and cylinder comprises the cylinder body with the mounting shell body by integral forming.The cylinder of this programme comprises the cylinder body with the mounting shell body by integral forming, cylinder directly is fixedly connected with installing between the housing, and need add new auxiliary mounting structure; Saved being suitable for of component; And practiced thrift installing space, and make the structural configuration of installing in the housing compact more, the spacing between shift fork and the sliding engaged cover is littler; More easily the sliding engaged cover is controlled, control accuracy is higher.Cylinder is arranged on that housing is installed is inboard, can avoid cylinder is arranged on external bring interfere with mounting shell external parts and cylinder is affected by the external environment and impaired problem easily of mounting shell, has improved the working life of cylinder.

The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.

Claims

1. shaft space difference speed device; Comprise and housing (10), differential lock (20) are installed and are arranged on the differential mechanism (30) in the said installation housing (10); Said differential lock (20) comprises that cylinder (21), sliding engaged cover (23) and driving are connected the shift fork (22) between said cylinder (21) and the said sliding engaged cover (23); Said sliding engaged cover (23) has first working state and second working state of separating with said differential mechanism (30) with said differential mechanism (30) engagement; It is characterized in that the cylinder body (211) of said cylinder (21) is one-body molded with said installation housing (10).

2. shaft space difference speed device according to claim 1 is characterized in that, said cylinder (21) is fixedly installed on said installation housing (10) inboard.

3. shaft space difference speed device according to claim 1; It is characterized in that; The piston rod (213) of said cylinder (21) in axial direction is slidably disposed in the said installation housing (10), and said shift fork (22) is arranged on the said piston rod (213), and is synchronized with the movement with said piston rod (213).

4. shaft space difference speed device according to claim 3 is characterized in that, the periphery wall of said sliding engaged cover (23) is provided with circular groove (231) along circumferential direction, and said shift fork (22) is fastened in the said circular groove (231).

5. shaft space difference speed device according to claim 3; It is characterized in that; The piston (212) of said cylinder (21) is outer in axial direction to be arranged with piston ring (24) and seal ring (25), and said piston ring (24) and said seal ring (25) are close to the inwall of said cylinder body (211).

6. shaft space difference speed device according to claim 3 is characterized in that, said shift fork (22) is set on the said piston rod (213), is threaded between said shift fork (22) and the said piston rod (213).

7. according to each described shaft space difference speed device in the claim 1 to 6; It is characterized in that; Said shift fork (22) is the direct dialing fork, and said direct dialing fork is positioned on the same plane in mounting point on the said cylinder (21) and the mounting point of said direct dialing fork on said sliding engaged cover (23).

8. shaft space difference speed device according to claim 7 is characterized in that, said installation housing (10) is reducer shell or ransaxle housing.

9. according to each described shaft space difference speed device in the claim 3 to 6; It is characterized in that; The outer returning spring (26) that is arranged with of said piston rod (213); One end of said returning spring (26) is connected on the step end face of said piston rod (213), and the other end is connected on the madial wall of said installation housing (10).