CN212717890U

CN212717890U - Box body transmission assembly, transfer case and operation mechanical equipment

Info

Publication number: CN212717890U
Application number: CN202021216555.7U
Authority: CN
Inventors: 易翔; 周鸿灯; 康旭辉
Original assignee: Sany Automobile Manufacturing Co Ltd
Current assignee: Sany Automobile Manufacturing Co Ltd
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2021-03-16
Anticipated expiration: 2030-06-28

Abstract

The utility model provides a box transmission assembly, transfer case and operation mechanical equipment. The box transmission assembly comprises: a main shaft; the end cover is provided with a mounting hole through which the main shaft penetrates; the coupling sleeve is provided with a through hole through which the main shaft penetrates, and is arranged at one end of the main shaft; the sealing ring is arranged between the main shaft and the coupling sleeve; wherein, the end of the coupling sleeve close to the end cover extends into the end cover. The utility model discloses an on the embodiment on the direct transmission of power that the shaft coupling received, and can not be used in on the sealing washer, make the operating condition of sealing washer stable, reduced the deflection of sealing washer to the production of sealing washer oil leak phenomenon has been avoided.

Description

Box body transmission assembly, transfer case and operation mechanical equipment

Technical Field

The application relates to the technical field of transfer cases, in particular to a case transmission assembly, a transfer case and operation mechanical equipment.

Background

In the related art, the transfer case is a device that distributes power of the engine, and can output the power to the rear axle or to both the front/rear axles. The main transmission part of the transfer case relates to a sealing structure, and if the main transmission part is poorly sealed, the hidden danger of oil leakage exists.

SUMMERY OF THE UTILITY MODEL

Embodiments according to the present invention aim to solve or improve at least one of the above technical problems

According to the utility model discloses a first aim at provides a box transmission assembly.

A second object according to an embodiment of the present invention is to provide a transfer case.

According to the utility model discloses a third aim at provides a work machinery equipment.

For the first purpose of realizing according to the embodiment of the utility model, provide a box transmission assembly, include: a main shaft; the end cover is provided with a mounting hole through which the main shaft penetrates; the coupling sleeve is provided with a through hole through which the main shaft penetrates, and is arranged at one end of the main shaft; the sealing ring is arranged between the main shaft and the coupling sleeve; wherein, the end of the coupling sleeve close to the end cover extends into the end cover.

In this technical scheme, the box transmission assembly is used for the transfer case, and the end cover has the mounting hole for supplying the main shaft to wear to establish, and the shaft coupling sleeve also has the centre bore for the main shaft wears to establish. The sealing ring is arranged on the main shaft and used for realizing sealing between the main shaft and the end cover, the sealing ring is positioned in a central hole of the end cover, and one end of the coupling sleeve, which is close to the end cover, extends into the central hole of the end cover and covers the sealing ring. When the transfer case is in a working state, the coupling sleeve and the main shaft synchronously rotate, and the force borne by the coupling sleeve can be directly transmitted to the main shaft and can not act on the sealing ring, so that the working state of the sealing ring is stable, the deformation of the sealing ring is greatly reduced, and the oil leakage phenomenon of the sealing ring is avoided. One end of the coupling sleeve extends into the central hole of the end cover to cover the sealing ring, and the sealing effect is further achieved between the main shaft and the gland.

In addition, according to the technical scheme that the embodiment of the utility model provides can also have following additional technical characterstic:

among the above-mentioned technical scheme, the shaft coupling sleeve includes: a sleeve body; the sealing end is arranged at one end of the sleeve body close to the end cover; wherein, the perforating hole passes through cover body and sealed end, and at least a part of the internal surface of sealed end and the surface of sealing washer are mutual contact.

In the technical scheme, the through hole and the main shaft are coaxially arranged, so that the sleeve body and the main shaft are coaxially arranged, and the movement process of the coupling sleeve is more stable. The seal end is formed by axially extending from one end of the sleeve body close to the end cover, and in order to enable the coupling sleeve to have a more stable structure during rotation, the outer diameter of the seal end is smaller than the minimum outer diameter of the sleeve body, so that a step surface is formed between the seal end and the sleeve body. The inner surface of the sealing end is in contact with the outer surface of the sealing ring, so that the inner surface of the sealing end can press the sealing ring, the sealing ring can play a better sealing role, and meanwhile, because the sealing end rotates along with the sleeve body, the stress of the sealing end can be transmitted to the main shaft, and the sealing ring cannot be further extruded to cause serious deformation of the sealing ring.

In any of the above technical solutions, the box transmission assembly further includes: the framework seal is arranged between the end cover and the seal end; the sealing end penetrates through the mounting hole, the outer surface of the framework seal is mutually attached to the mounting hole, and at least one part of the inner surface of the framework seal is mutually attached to the outer surface of the sealing end.

In the technical scheme, the end cover is provided with a step hole, the framework seal is provided with an annular structure, and the framework seal is arranged in the step hole and surrounds the seal end. Specifically, the outer side face of the framework seal is in contact with the hole wall of the stepped hole, the end face of one end of the framework seal is abutted against the stepped face of the stepped hole, and at least one part of the inner performance of the framework seal is attached to the outer surface of the sealing end, so that the sealing between the sealing end and the end cover is realized. The framework seal is also called framework oil seal, and the oil seal is generally referred to as framework oil seal. The oil seal generally serves to isolate the components to be lubricated from the output components, so as not to allow the lubricating oil to leak.

In any of the above technical solutions, the box transmission assembly further includes: the main shaft is arranged in the shell, and the end cover is arranged on the shell; the sealing gasket is arranged between the shell and the end cover; wherein, the end cover is provided with the step far away from the one end of shaft coupling, and the step stretches into in the casing.

In this technical scheme, the casing, the outside of main shaft is located to end cover and shaft coupling sleeve with the axle center cover, that is, the casing also has the centre bore, the main shaft runs through the shaft coupling sleeve in proper order, end cover and casing, the casing is fixed part, the end cover includes the end cover body and follows the convex step of end cover body axial, the one end that the end cover body is close to the casing is located to the step, and be formed with the step face between the end cover body, the step is used for stretching into in the centre bore of casing, the surface of step and the pore wall of the centre bore of casing are laminated each other, make the connection structure of end cover and fixed casing more. The annular groove is arranged on the step surface between the end cover body and the step and surrounds the protruding part and is used for installing the sealing gasket, so that the sealing gasket is positioned between the step surface of the end cover body and the end surface of one end of the shell, and good sealing between the shell and the end cover can be realized.

In any of the above technical solutions, the bearing includes an inner ring sleeve and an outer ring sleeve, the inner ring sleeve is disposed on the main shaft, and the outer ring sleeve is matched with the housing; wherein, the terminal surface of sealed end and the terminal surface of bearing are laminated each other.

In this technical scheme, be equipped with two bearings on the main shaft, thereby the rotation of main shaft is realized through outer snare and casing cooperation to the bearing, is equipped with the axle sleeve between two bearings, and wherein, the terminal surface of the bearing that is close to the end cover is laminated with the terminal surface of sealed end each other to accurate cooperation can guarantee that shaft sleeve and main shaft are coaxial. In addition, when the sealing end rotates along with the sleeve body, a part of acting force is applied to the end face of the bearing, so that the sealing end can be prevented from extruding the sealing ring, and the sealing ring is prevented from deforming.

In any of the above technical solutions, the seal ring is a star-shaped seal ring, a flat gasket seal ring or an annular seal ring.

In this technical scheme, the sealing washer is the rubber circle, and the elasticity of rubber circle can improve sealing performance. The star-shaped sealing ring, the flat gasket sealing ring or the annular sealing ring are standard parts, have good sealing performance, are convenient to purchase and are low in cost.

In any of the above technical solutions, the box transmission assembly further includes: a fastener for connecting the coupling sleeve and the main shaft, wherein the fastener comprises: the screw rod is arranged at one end of the main shaft extending into the shaft coupling sleeve; the gasket is sleeved on the screw rod; the nut is in threaded connection with the screw; the clamping ring is arranged at one end of the screw rod, which extends out of the nut; the through hole is a step hole, one end of the washer abuts against the nut, and the other end of the washer abuts against the step surface of the step hole.

In this technical scheme, need carry out axial fixity between main shaft and the shaft coupling, consequently, the one end of main shaft is located the through-hole of shaft coupling to connect main shaft and shaft coupling through the fastener, connect through the fastener, connection structure is simple, easily realizes, so that the shaft coupling can be along with main shaft synchronous revolution. The threaded hole is formed in one end, located in the central hole of the coupling sleeve, of the main shaft and used for penetrating the screw rod, the step hole is formed in the through hole, therefore, a step surface is formed in the through hole, the cushion ring is sleeved on the screw rod and is locked through the nut after the step surface is compressed, axial connection between the main shaft and the coupling sleeve can be achieved, and axial structure fixation of the driving gear is guaranteed. The clamping ring is arranged on the part of the screw rod extending out of the nut, is directly clamped on the main abutment of the screw rod and is generally made of metal. The snap ring mainly plays a role in retention, stabilization and support. The snap ring typically used is a cast three-armed snap ring.

In any of the above technical solutions, the box transmission assembly further includes: the driving gear is arranged on the main shaft; wherein, the coupling sleeve is fixedly connected with the main shaft, so that the driving gear and the coupling sleeve rotate synchronously.

In this technical scheme, still be equipped with the driving gear on the main shaft, the driving gear is not shown in the figure, and the shaft coupling sleeve passes through the spline and is connected with the main shaft, and the driving gear is at rotatory in-process, need guarantee with shaft coupling sleeve synchronous revolution, consequently, the shaft coupling sleeve passes through the spline and is connected with the main shaft, just can guarantee that shaft coupling sleeve and driving gear keep synchronous rotation, has guaranteed the stable in structure of sealing washer and skeleton seal.

For the second purpose of realizing the embodiment according to the present invention, there is provided a transfer case, including: the box drive assembly of any of the embodiments.

In this technical solution, the transfer case is a device that distributes the power of the engine, and can output the power to the rear axle or to both the front and rear axles. Because according to the utility model discloses an embodiment provides transfer case includes the box transmission assembly in any embodiment, consequently, transfer case still has according to the utility model discloses an arbitrary embodiment's all beneficial effects of box transmission assembly.

To achieve the third object according to the embodiments of the present invention, there is provided a work machine including: a chassis; the operation device is arranged on the chassis; and the transfer case is connected with the working device and used for driving the working device.

In the technical scheme, the transfer case is provided with a power output end, and the power output end is connected with the operation device to drive the operation device. Because according to the utility model discloses an operation mechanical equipment that the embodiment provided includes the box transmission assembly in arbitrary embodiment, consequently, operation mechanical equipment still has according to the utility model discloses the whole beneficial effect of the box transmission assembly of arbitrary embodiment.

Additional aspects and advantages of embodiments in accordance with the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments in accordance with the invention.

Drawings

Fig. 1 is a cross-sectional structural view of a seal structure of a reducer end face in the related art;

FIG. 2 is a cross-sectional structural schematic view of a seal structure of a transfer case drive gear portion of the related art;

FIG. 3 is a schematic cross-sectional structural view of a case drive assembly according to some embodiments of the present invention;

FIG. 4 is a cross-sectional structural schematic view of a coupling sleeve of the box drive assembly according to some embodiments of the present invention;

fig. 5 is a schematic diagram of a work machine apparatus according to some embodiments of the present disclosure.

Wherein, the correspondence between the reference numbers and the part names of fig. 1 and fig. 2 is:

100': sealing structure of reducer end face, 100 ": seal structure of transfer case drive gear portion, 110 ": drive shaft, 120 ": gland, 130 ": check ring, 140 ": shaft sleeve structure, 150 ": a rubber ring.

Wherein, the correspondence between the reference numbers and the part names in fig. 3 to 5 is:

1: work machine equipment, 10: transfer case, 100: case gear assembly, 110: main shaft, 120: end cap, 122: mounting hole, 124: step, 130: coupling sleeve, 132: sleeve body, 134: seal end, 136: through-hole, 140: seal ring, 150: framework seal, 160: a housing, 170: gasket, 180: bearing, 182: inner race, 184: outer race, 190: fastener, 192: screw, 194: gasket, 196: nut, 198: snap ring, 20: chassis, 30: provided is a working device.

Detailed Description

In order to make the above objects, features and advantages according to the embodiments of the present invention more clearly understood, embodiments according to the present invention will be described in further detail below with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth to provide a thorough understanding of embodiments according to the invention, however, embodiments according to the invention may also be implemented in other ways than those described herein, and therefore the scope of protection of embodiments according to the invention is not limited by the specific embodiments disclosed below.

Fig. 1 shows a sealing structure 100 'of a reducer end surface in the related art, where the sealing structure 100' of the reducer end surface includes a driving gear, an end cover, a coupling sleeve, a nut, a sealing ring, a skeleton seal, and the like. The structure is characterized in that the axial parts of the driving gear are locked through the nut, and the play cannot occur. The coupling sleeve is in dynamic seal with the end cover through the framework seal. And a sealing ring is adopted between the driving gear and the coupling sleeve for sealing.

Fig. 2 is a sealing structure 100 "of a transfer case driving gear portion in the related art, where the sealing structure 100" of the transfer case driving gear portion includes a driving shaft 110", a gland 120", and a shaft sleeve structure 140", the gland 120" is sleeved on the driving shaft 110", a retainer ring 130 is disposed between the gland 120" and the driving shaft 110", a rubber ring 150" is disposed between the retainer ring 130 "and the driving shaft 110" for sealing, and the shaft sleeve structure 140 "is disposed at one end of the driving shaft 110" and is abutted to the retainer ring 130 ". In the use process, the positions of the transfer driving gear (not shown in the figure) and the retainer ring 130 ' are kept unchanged, but when the fastening force disappears or is insufficient, the driving shaft 110 ' and the retainer ring 130 ' can not synchronously rotate to form a relative static relation, so that the problem of static seal failure is easily caused, and the hidden danger of oil leakage is caused. In addition, the check ring 130 "is supported by the rubber ring 150", but the rubber ring 150 "is a rubber piece and is easy to deform, so that the rubber ring 150" is easy to deform under the stress action of the check ring 130", and the potential oil leakage exists. Meanwhile, the dynamic sealing structure has higher requirement on the processing precision of the retainer ring 130 ', but the rubber ring 150 ' has larger deformation and conflicts with the rubber ring 150 ' with precise design, so that the oil leakage hidden danger is increased.

Therefore, according to the embodiment of the present invention, a box transmission assembly 100 is proposed to solve at least one of the above disadvantages of the related art.

Technical solutions according to some embodiments of the present invention are described below with reference to fig. 3 to 5.

Example 1

As shown in fig. 3, the present embodiment provides a box transmission assembly 100, including: the main shaft 110, the end cover 120, the coupling sleeve 130 and the sealing ring 140, and the main shaft 110; an end cover 120 provided with a mounting hole 122 through which the main shaft 110 passes; a coupling sleeve 130 having a through hole 136 through which the main shaft 110 is inserted, the coupling sleeve 130 being provided at one end of the main shaft 110; a packing 140 provided between the main shaft 110 and the coupling sleeve 130; wherein an end of the coupling sleeve 130 near the end cap 120 extends into the end cap 120.

In this embodiment, the case drive assembly 100 is used in a transfer case, the end cap 120 has a mounting hole 122 for the main shaft 110 to pass through, and the coupling sleeve 130 also has a central hole for the main shaft 110 to pass through. The sealing ring 140 is mounted on the main shaft 110 for sealing between the main shaft 110 and the end cap 120, the sealing ring 140 is located in the central hole of the end cap 120, and one end of the coupling sleeve 130 close to the end cap 120 extends into the central hole of the end cap 120 and covers the sealing ring 140. When the transfer case is in a working state, the coupling sleeve 130 and the main shaft 110 synchronously rotate, and the force borne by the coupling sleeve 130 is directly transmitted to the main shaft 110 and does not act on the sealing ring 140, so that the working state of the sealing ring 140 is stable, the deformation of the sealing ring 140 is greatly reduced, and the oil leakage phenomenon of the sealing ring 140 is avoided. One end of the coupling sleeve 130 extends into the central hole of the end cap 120 to cover the sealing ring 140, and further performs a sealing function between the main shaft 110 and the end cap 120.

Example 2

As shown in fig. 3 and 4, the present embodiment provides a case gear assembly 100. In addition to the technical features of the above embodiment, the present embodiment further includes the following technical features:

the coupling sleeve 130 includes: the sleeve comprises a sleeve body 132, a sealing end 134 and a through hole 136, wherein the sealing end 134 is arranged at one end of the sleeve body 132 close to the end cover 120; the through hole 136 penetrates the sleeve body 132 and the seal end 134, and at least a part of the inner surface of the seal end 134 is in contact with the outer surface of the seal ring 140.

In this embodiment, the through hole 136 is coaxial with the main shaft 110, so as to ensure the sleeve body 132 is coaxial with the main shaft 110, and ensure the movement process of the coupling sleeve 130 to be more stable. The sealing end 134 is formed to extend axially from an end of the sleeve body 132 adjacent to the end cap 120, and in order to allow the coupling sleeve 130 to have a more stable structure when rotated, the outer diameter of the sealing end 134 is smaller than the minimum outer diameter of the sleeve body 132, so that a stepped surface is formed between the sealing end 134 and the sleeve body 132. The inner surface of the sealing end 134 contacts the outer surface of the sealing ring 140, so that the inner surface of the sealing end 134 can press the sealing ring 140, and thus the sealing ring 140 can perform a better sealing function, and meanwhile, as the sealing end 134 rotates along with the sleeve body 132, the stress of the sealing end 134 is transmitted to the main shaft 110, and the sealing ring 140 cannot be further pressed to cause serious deformation of the sealing ring 140.

Example 3

the case gear assembly 100 further includes: a skeleton seal 150, the skeleton seal 150 disposed between the end cap 120 and the seal end 134; the sealing end 134 is disposed in the mounting hole 122, the outer surface of the frame seal 150 is attached to the mounting hole 122, and at least a portion of the inner surface of the frame seal 150 is attached to the outer surface of the sealing end 134.

In this embodiment, the end cap 120 is provided with a stepped bore, and the skeletal seal 150 has an annular configuration, is disposed within the stepped bore, and is disposed around the seal end 134. Specifically, the outer side surface of the skeleton seal 150 and the hole wall of the stepped hole contact each other, the end surface of one end of the skeleton seal 150 and the stepped surface of the stepped hole abut against each other, and at least a part of the inner surface of the skeleton seal 150 and the outer surface of the seal end 134 are attached to each other, so that the seal between the seal end 134 and the end cover 120 is realized. The frame seal 150, also referred to as a frame oil seal, is representative of an oil seal, and is generally referred to as a frame oil seal. The oil seal generally serves to isolate the components to be lubricated from the output components, so as not to allow the lubricating oil to leak. The framework acts as a reinforcement for the steel bars inside the concrete member and allows the oil seal to maintain shape and tension. The framework oil seal can be divided into a single-lip framework oil seal and a double-lip framework oil seal according to the structural form, and the auxiliary lip of the double-lip framework oil seal plays a dustproof role to prevent external dust, impurities and the like from entering the end cover 120. The framework oil seal can be divided into an inner-wrapped framework oil seal, an exposed framework oil seal and an assembled oil seal according to the framework type. The framework oil seals can be divided into rotary framework oil seals, reciprocating framework oil seals and the like according to working conditions, and are not described in detail herein.

Example 4

As shown in fig. 3, the present embodiment provides a case gear assembly 100. In addition to the technical features of the above embodiment, the present embodiment further includes the following technical features:

the case gear assembly 100 further includes: the end part of the main shaft 110 extends into the coupling sleeve 130, the middle part of the main shaft 110 is positioned in the housing 160, and the end cover 120 covers the housing 160; a gasket 170 disposed between the housing 160 and the end cap 120; wherein, the end of the end cap 120 far away from the coupling sleeve 130 is provided with a step 124, and the step 124 extends into the housing 160.

In this embodiment, the housing 160, the end cap 120 and the coupling sleeve 130 are coaxially sleeved outside the main shaft 110, that is, the housing 160 also has a central hole, the main shaft 110 sequentially penetrates through the coupling sleeve 130, the end cap 120 and the housing 160, the housing 160 is a fixed component, the end cap 120 includes an end cap body and a step 124 protruding in an axial direction of the end cap body, the step 124 is disposed at one end of the end cap body close to the housing 160, and a step surface is formed between the step 124 and the end cap body, the step 124 is used for extending into the central hole of the housing 160, and an outer surface of the step 124 is attached to a hole wall of the central hole of the housing 160, so that a connection structure between the end cap 120 and. An annular groove is formed in the step surface between the end cap body and the step 124, and the annular groove is formed around the protruding portion and used for installing the sealing gasket 170, so that the sealing gasket 170 is located between the step surface of the end cap body and the end surface of one end of the shell 160, and good sealing between the shell 160 and the end cap 120 can be achieved.

Example 5

the case gear assembly 100 further includes: the bearing 180, the bearing 180 includes the inner race 182 and outer race 184, the inner race 182 locates on the main axis 110, and the outer race 184 cooperates with body 160; wherein the end surface of the sealing end 134 and the end surface of the bearing 180 are attached to each other.

In this embodiment, two bearings 180 are disposed on the main shaft 110, the bearings 180 are matched with the housing 160 through the outer ring 184 to realize rotation of the main shaft 110, a shaft sleeve is disposed between the two bearings 180, wherein an end surface of the bearing 180 close to the end cap 120 is attached to an end surface of the sealing end 134, and is precisely matched with the end surface, so that the coaxiality of the shaft sleeve 130 and the main shaft 110 can be ensured. In addition, when the sealing end 134 rotates along with the sleeve body 132, a part of acting force is applied to the end surface of the bearing 180, so that the sealing end 134 can avoid extruding the sealing ring 140, and the sealing ring 140 is ensured not to deform.

Example 6

the seal ring 140 is a star seal ring, a flat gasket seal ring, or an annular seal ring.

In this embodiment, the sealing ring 140 is a rubber ring, and the elasticity of the rubber ring can improve the sealing performance. The star-shaped sealing ring, the flat gasket sealing ring or the annular sealing ring are standard parts, and have good sealing novelty, convenient purchase and low cost. Specifically, the star seal ring is a double-acting seal member having elastic sealing performance, radial or axial contact stress generated by pre-compression during initial installation is superposed with system pressure to realize a sealing function, and the superposed sealing force is increased along with the increase of the system pressure. Under pressure, the star seal behaves like a fluid with a very high surface tension. The pressure can be uniformly transmitted to all the surfaces. The flat gasket sealing ring can be made of silica gel, and the sealing structure is good. O-rings are common ring seals, mainly used for mechanical parts to prevent leakage of liquid or gaseous media under static conditions. In some cases, the O-ring can also be used as a dynamic sealing element for axial reciprocating motion and low-speed rotation motion, and different materials can be selected to be suitable for the O-ring according to different conditions, which is not described herein again.

Example 7

the case gear assembly 100 further includes: a fastener 190, the fastener 190 for connecting the coupling sleeve 130 and the main shaft 110. Wherein, fastener 190 includes: the screw 192, the washer 194, the nut 196 and the snap ring 198, and the screw 192 are arranged at one end of the main shaft 110 extending into the coupling sleeve 130; a washer 194 sleeved on the screw 192; a nut 196 threadedly coupled to the screw 192; a snap ring 198 disposed at one end of the screw 192 extending beyond the nut 196; the through hole 136 is a stepped hole, one end of the washer 194 abuts against the nut 196, and the other end of the washer 194 abuts against a stepped surface of the stepped hole.

In this embodiment, the main shaft 110 and the coupling sleeve 130 need to be axially fixed, so one end of the main shaft 110 is located in the through hole 136 of the coupling sleeve 130, the main shaft 110 and the coupling sleeve 130 are connected through the fastening member 190, and the connection is performed through the fastening member 190, which is simple in connection structure and easy to implement, so that the coupling sleeve 130 can synchronously rotate along with the main shaft 110. One end of the main shaft 110, which is located in the central hole of the coupling sleeve 130, is provided with a threaded hole for penetrating the screw 192, and a step hole is formed in the through hole 136, so that a step surface is formed in the through hole 136, and the washer 194 is sleeved on the screw 192 and is locked by the nut 196 after pressing the step surface, so that the axial connection between the main shaft 110 and the coupling sleeve 130 can be realized, and the axial structure fixation of the driving gear is ensured. The snap ring 198 is provided on the portion of the threaded rod 192 extending beyond the nut 196, and the snap ring 198 is directly snapped onto the primary abutment of the threaded rod 192 and is typically made of metal. The snap ring 198 primarily functions as a retention, stabilization, and support. The commonly used snap ring 198 is a cast three-armed snap ring, also known as a positive snap ring, which is composed of snap ring arms, snap ring bodies, a support bracket and a connector, and will not be described herein.

Example 8

the box transmission assembly further comprises: a driving gear, which is arranged on the main shaft 110; the coupling sleeve 130 is fixedly connected to the main shaft 110, so that the driving gear and the coupling sleeve 130 rotate synchronously.

In this embodiment, the main shaft 110 is further provided with a driving gear, the coupling sleeve 130 is connected with the main shaft 110 through a spline, the driving gear is not shown in the figure, and the driving gear needs to be ensured to rotate synchronously with the coupling sleeve 130 in the rotating process, so that the coupling sleeve 130 is connected with the main shaft 110 through the spline, the coupling sleeve 130 and the driving gear can be ensured to rotate synchronously, and the stable structure of the seal ring 140 and the skeleton seal 150 is ensured.

Example 9

As shown in FIG. 5, the present embodiment provides a transfer case 10 including the case drive assembly 100 of either embodiment.

In the present embodiment, the transfer case 10 is a device that distributes the power of the engine, and can output the power to the rear axle or to both the front and rear axles. Since the transfer case 10 provided according to embodiments of the present invention includes the case drive assembly 100 of any embodiment, the transfer case 10 also has all of the benefits of the case drive assembly 100 according to any embodiment of the present invention.

Example 10

As shown in fig. 5, the present embodiment provides a work machine apparatus 1 including: the transfer case comprises a chassis 20, a working device 30 and a transfer case 10, wherein the working device 30 is arranged on the chassis 20; the transfer case 10 is connected to the working device 30 for driving the working device 30.

In this embodiment, the transfer case 10 has a power take-off, and is connected to the working device 30 via the power take-off, so that the working device 30 can be driven. For example, the work machine 1 is a vehicle, and front and rear wheels of the vehicle can be driven by the transfer case 10, and the structure is reliable and the safety is high. In addition, since the working machine 1 provided according to the embodiment of the present invention includes the box transmission assembly 100 in any embodiment, the working machine 1 also has all the advantageous effects of the box transmission assembly 100 according to any embodiment of the present invention.

According to the utility model discloses an embodiment cancels the retaining ring to with the extension of shaft coupling sleeve 130, length is as long as former retaining ring, and the internal diameter of shaft coupling sleeve 130 carries out the precision fit with the bearing 180's of gear installation end, has guaranteed that shaft coupling sleeve 130 is concentric with the gear. A sealing ring structure is arranged between the coupling sleeve 130 and the gear, and a framework sealing structure is arranged between the coupling sleeve 130 and the end cover 120. The axial structure of the driving gear is locked by a nut. During operation, the coupling sleeve 130 is connected with the main shaft 110 through the spline, so that the coupling sleeve 130 and the driving gear are ensured to rotate simultaneously, and the stability of a sealing ring structure and a framework sealing structure is ensured. Because the driving gear is combined with the baffle ring, the baffle ring and the gear synchronously rotate, and the original dynamic sealing structure and static sealing structure are effective after long-time work. The force applied to the original retainer ring is transmitted to the main shaft 110 through the coupling sleeve 130 and does not act on the seal ring, so that the working state of the seal ring is stable, and the deformation of the seal ring is greatly reduced.

To sum up, according to the utility model discloses a beneficial effect of embodiment does:

1. the sealing end 134 extends into the end cover 120 as an extension of the coupling sleeve 130 to replace the function of an original retainer ring, and the force applied to the coupling sleeve 130 in the rotation process is transmitted to the shaft and does not act on the sealing ring 140, so that the working state of the sealing ring 140 is more stable, the deformation of the sealing ring 140 is greatly reduced, and the oil leakage phenomenon is avoided.

2. The axial fixation of the driving gear is realized by arranging the fastening piece 190 between the main shaft 110 and the coupling sleeve 130, the connecting structure is simple and reliable, and the axial fixation of the driving gear can be ensured.

3. The coupling sleeve 130 is connected with the main shaft 110 through a spline, so that synchronous rotation of the driving gear and the coupling sleeve 130 is ensured.

In embodiments in accordance with the present invention, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the embodiments according to the present invention can be understood by those of ordinary skill in the art as the case may be.

In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description according to the embodiments of the present invention, but do not indicate or imply that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the embodiments according to the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example in accordance with an embodiment of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment according to the present invention, and is not intended to limit the embodiment according to the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the embodiment according to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments according to the present invention should be included in the protection scope of the embodiments according to the present invention.

Claims

1. A case drive assembly, comprising:

a main shaft;

the end cover is provided with a mounting hole through which the main shaft penetrates;

the coupling sleeve is provided with a through hole through which the main shaft penetrates, and the coupling sleeve is arranged at one end of the main shaft;

the sealing ring is arranged between the main shaft and the coupling sleeve;

one end of the coupling sleeve, which is close to the end cover, extends into the end cover.

2. A box drive assembly as set forth in claim 1 wherein said coupling sleeve includes:

a sleeve body;

the sealing end is arranged at one end of the sleeve body close to the end cover;

wherein the through hole penetrates through the sleeve body and the sealing end, and at least a part of the inner surface of the sealing end is in contact with the outer surface of the sealing ring.

3. The case drive assembly of claim 2, further comprising:

the framework seal is arranged between the end cover and the seal end;

the sealing end penetrates through the mounting hole, the outer surface of the framework seal is attached to the mounting hole, and at least one part of the inner surface of the framework seal is attached to the outer surface of the sealing end.

4. The case drive assembly of claim 2, further comprising:

the spindle is arranged in the shell, and the end cover is covered on the shell;

the sealing gasket is arranged between the shell and the end cover;

one end of the end cover, which is far away from the coupling sleeve, is provided with a step, and the step extends into the shell.

5. The case drive assembly of claim 4, further comprising:

the bearing comprises an inner ring sleeve and an outer ring sleeve, the inner ring sleeve is sleeved on the main shaft, and the outer ring sleeve is matched with the shell;

and the end face of the sealing end is attached to the end face of the bearing.

6. A case drive assembly as claimed in any one of claims 1 to 5,

the sealing ring is a star-shaped sealing ring, a flat gasket sealing ring or an annular sealing ring.

7. The case drive assembly of claim 6, further comprising:

a fastener for connecting the coupling sleeve and the main shaft, wherein the fastener comprises:

the screw rod is arranged at one end of the main shaft extending into the shaft coupling sleeve;

the gasket is sleeved on the screw rod;

the nut is in threaded connection with the screw;

the clamping ring is arranged at one end of the screw rod extending out of the nut;

the through hole is a stepped hole, one end of the washer abuts against the nut, and the other end of the washer abuts against a stepped surface of the stepped hole.

8. The case drive assembly of claim 7, further comprising:

the driving gear is arranged on the main shaft;

the coupling sleeve is fixedly connected with the main shaft, so that the driving gear and the coupling sleeve rotate synchronously.

9. A transfer case, comprising:

a box drive assembly as claimed in any one of claims 1 to 8.

10. A work machine apparatus, comprising:

a chassis;

the operation device is arranged on the chassis;

the transfer case of claim 9 connected to said work device for driving said work device.