阅读说明：本技术 两档减速箱的离合器与制动器集成机构及其安装方法 (Clutch and brake integrated mechanism of two-gear reduction gearbox and installation method thereof ) 是由 苟凯 韩旭鑫 吴娜 于 2020-12-18 设计创作，主要内容包括：本发明公开了两档减速箱的离合器与制动器集成机构及其安装方法,所述集成机构包括制动器内壳与离合器外壳；所述制动器内壳与所述离合器外壳的外圆周均周向设有多个铆钉孔,多个所述铆钉孔内设有铆钉将所述制动器内壳与所述离合器外壳铆接在一起,所述集成机构焊接在输出毂上,所述集成机构内设有主输入毂组件,所述主输入毂组件包括主输入焊接组件,以及轴向安装在所述主输入毂焊接组件上的离合器活塞,所述离合器活塞上周向设有压缩弹簧组件。解决了传统的减速箱结构中,都是直接将离合器与动力输入端相连,对于双离合器的转速要求较为苛刻,导致其结构过于复杂,效率较低,且成本较高的问题。(The invention discloses a clutch and brake integrated mechanism of a two-gear reduction box and an installation method thereof, wherein the integrated mechanism comprises a brake inner shell and a clutch outer shell; the stopper inner shell with the equal circumference of the outer circumference of clutch housing is equipped with a plurality of rivet holes, and is a plurality of be equipped with the rivet in the rivet hole will the stopper inner shell with the riveting of clutch housing is in the same place, the integrated mechanism welding is on the output hub, be equipped with main input hub subassembly in the integrated mechanism, main input hub subassembly includes main input welded assembly to and the axial is installed clutch piston on the main input hub welded assembly, circumference is equipped with the compression spring subassembly on the clutch piston. The problem of in the traditional reducing gear box structure, all directly link to each other the clutch with the power input end, require comparatively harsh to the rotational speed of double clutch, lead to its structure too complicated, efficiency is lower, and the cost is higher is solved.)

1. The clutch and brake integration mechanism of the two-gear reduction box comprises a brake inner shell (3) and a clutch outer shell (6); stopper inner shell (3) with the equal circumference in outer circumference of clutch housing (6) is equipped with a plurality of rivet holes, and is a plurality of be equipped with the rivet in the rivet hole will stopper inner shell (3) with clutch housing (6) riveting is in the same place, integrated mechanism welds on output hub (21), its characterized in that: be equipped with main input hub subassembly in the integrated mechanism, main input hub subassembly includes main input welded subassembly, and the axial is installed clutch piston (14) on the main input hub welded subassembly, circumference is equipped with compression spring subassembly (15) on clutch piston (14), keep away from compression spring subassembly (15) the one end of clutch piston (14) is connected with clutch balance piston (10), clutch balance piston (10) axial is installed on the main input welded subassembly, be connected with release bearing (18) on the main input welded subassembly, be equipped with thrust ring subassembly on release bearing (18), thrust ring subassembly with integrated mechanism parallel arrangement.

2. The clutch and brake integration mechanism of the two-gear reduction gearbox according to claim 1, characterized in that: main input hub welding subassembly includes main input hub (11), the welding has connection piston (12) on main input hub (11) outer peripheral face, the welding has clutch inner shell (7) on connecting piston (12), clutch inner shell (7) set up in the casing of clutch outer shell (6), the welding has support ring (13) on clutch inner shell (7).

3. The clutch and brake integration mechanism of the two-gear reduction gearbox according to claim 2, characterized in that: the clutch piston (14) and the clutch balance piston (10) are axially arranged on the outer peripheral surface of the main input hub (11); first ring channel and second ring channel have been seted up on clutch piston (14), be equipped with in the first ring channel clutch inner shell (7), circumference is equipped with compression spring subassembly (15) in the second ring channel, the other end of compression spring subassembly (15) is connected with clutch balance piston (10).

4. The clutch and brake integration mechanism of the two-gear reduction gearbox according to claim 1, characterized in that: the thrust ring assembly comprises an inner thrust ring (17), one surface, facing the main input hub welding assembly, of the inner thrust ring (17) is connected with a release bearing (18), an outer thrust ring (16) is arranged outside the inner thrust ring (17), and the outer thrust ring (16) and the brake shell (1) are arranged in parallel.

5. The clutch and brake integration mechanism of the two-gear reduction gearbox according to claim 4, characterized in that: outer thrust ring (16) face one side circumference of stopper shell (1) is provided with a plurality of integrated into one piece's lug, and is a plurality of the one end of lug extends to in stopper shell (1), outer thrust ring (16) with circumference is provided with a plurality of coil spring (20) between stopper shell (1), coil spring (20) quantity is at least 20.

6. The clutch and brake integration mechanism of the two-gear reduction gearbox according to claim 4, characterized in that: the inner thrust ring (17) and the outer thrust ring (16) are both provided with a plurality of grooves, and O-shaped rings (19) are arranged in the grooves.

7. The clutch and brake integration mechanism of the two-gear reduction gearbox according to claim 1, characterized in that: stopper shell (1) towards a plurality of stopper steel sheets (4) are installed to the one side axial of stopper inner shell (3), and pass through stopper snap ring (2) on stopper shell (1) carry out the axial and support, and are a plurality of be equipped with stopper friction disc (5) between stopper steel sheet (4), stopper friction disc (5) set up on stopper inner shell (3), clutch shell (6) towards a plurality of clutch friction disc (8) are installed to the one side axial of clutch inner shell (7), and are a plurality of install a plurality of clutch steel sheet (9) between clutch friction disc (8).

8. The clutch and brake integration mechanism of the two-gear reduction gearbox according to claim 1, characterized in that: the brake device is characterized in that a plurality of splines are formed in the brake shell (1), the splines are connected with splines inside the reduction gearbox, and the brake shell (1) is axially inserted into the splines inside the reduction gearbox and axially fixed through a snap ring inside the reduction gearbox.

9. The clutch and brake integration mechanism of the two-gear reduction gearbox according to claim 1, characterized in that: an oil cavity and an oil hole are formed in the main input hub (11).

10. The method for mounting the clutch and brake integrated mechanism of the two-gear reduction box adopts the clutch and brake integrated mechanism of the two-gear reduction box as claimed in any one of claims 1 to 9, and comprises the following steps:

step 1: welding the main input hub (11) and the connecting piston (12) together to form a sub-assembly, then welding the clutch inner housing (7) and the support ring (13) together to form another sub-assembly, and finally welding the two sub-assemblies together to form the main input hub welded component.

Step 2: on the basis of the step 1, after the assembly of the main input hub assembly is finished, the clutch balance piston (10) is assembled to the main input hub welding assembly through clearance fit, the compression spring assembly (15) is pre-installed into the clutch piston (14), and then is installed into the main input hub welding assembly as a whole to form the main input hub assembly.

And step 3: on the basis of step 2, will clutch outer shell (6) assemble the casing of clutch inner shell (7) outside clutch inner shell (7) with install between clutch outer shell (6) clutch steel sheet (9) with clutch friction disc (8), and set up the rivet hole in clutch outer shell (6) outer circumference, will through the rivet clutch outer shell (6) with stopper inner shell (3) assemble together, then the outside assembly of stopper inner shell (3) stopper outer shell (1) brake outer shell (1) with assemble between stopper inner shell (3) stopper steel sheet (4) with stopper friction disc (5), and brake outer shell (1) facial make up snap ring (2).

And 4, step 4: on the basis of step 3, the release bearing (18) is axially connected to the clutch piston (14), the inner thrust ring (17) is assembled on the release bearing (18), the outer thrust ring (16) is connected to the shell of the brake shell (1) through a spiral spring (20), and the integrated mechanism is integrally welded to an output hub (21).

Technical Field

The invention relates to the technical field of automobile gearbox equipment, in particular to a clutch and brake integrated mechanism of a two-gear reduction gearbox and an installation method thereof.

Background

The automobile gearbox is often called as a 'gearbox' in an automobile, is often called as a 'speed changer' in industrial machinery, is mechanical or hydraulic equipment for mechanical power conversion, and is used for improving the efficiency and the economy of electric driving, reducing the requirements on the capacity of a motor and the capacity of a battery and achieving unpowered interrupted gear shifting.

In the Chinese invention patent CN111207182A, a 'amphibian clutch transfer case' is proposed, the invention mainly solves the problems that the prior transmission system has complex operation, higher operation requirement and is easy to generate errors in the use process, the main improvement of the device is that a structural design that a separating plug is arranged between outer friction plates of a wet clutch is adopted in the transfer case, the belt exhaust torque when the wet clutch is disengaged is reduced, and a brake unit is integrated on the structure of a wet clutch which outputs power to the water running system, so that when the amphibious vehicle runs on land, the output end of the overwater running system is output without power, thereby avoiding the hidden trouble that the overwater running system is possibly driven to work by belt-driven torque, although the safety is ensured, the use scene is single, the safety monitoring device cannot be popularized to daily life, and the use cost is high.

Chinese CN102555788A proposes a double-clutch structure, which designs a double-clutch main hub into an integral structure, reduces the number of parts of the main hub, reduces the manufacturing cost of the double clutch, ensures the working performance of the double clutch, reduces the axial size of the double clutch, and is beneficial to the spatial arrangement of the device.

Therefore, a clutch and brake integrated mechanism of the two-gear reduction box and an installation method thereof are provided.

Disclosure of Invention

The invention provides a clutch and brake integrated mechanism of a two-gear reduction box and an installation method thereof to solve the technical problems.

In order to achieve the purpose, the invention provides the following technical scheme:

the clutch and brake integration mechanism of the two-gear reduction box comprises a brake inner shell and a clutch outer shell; a plurality of rivet holes are circumferentially arranged on the outer circumferences of the brake inner shell and the clutch outer shell, rivets are arranged in the rivet holes to rivet the brake inner shell and the clutch outer shell together, the integrated mechanism is welded on the output hub, a main input hub assembly is arranged in the integrated mechanism, the main input hub assembly comprises a main input welding assembly, and a clutch piston axially mounted on the main input hub weld assembly, a compression spring assembly circumferentially disposed on the clutch piston, one end of the compression spring assembly, which is far away from the clutch piston, is connected with a clutch balance piston, the clutch balance piston is axially arranged on the main input welding assembly, the main input welding assembly is connected with a release bearing, and the release bearing is provided with a thrust ring assembly, and the thrust ring assembly is arranged in parallel with the integrated mechanism.

The brake inner shell and the clutch outer shell are fastened through rivets, and an integrated mechanism formed by the brake inner shell and the clutch outer shell is installed on the same output hub, wherein a main input hub assembly in the integrated mechanism consists of an input hub welding assembly, a clutch piston, a compression spring assembly and a clutch balance piston, and the main input hub assembly is installed in a corresponding shaft in the reduction gearbox and is connected with the shaft through a spline in the main input hub welding assembly, so that torque is transmitted.

Preferably, main input hub welding subassembly includes the main input hub, the welding has the connecting piston on the main input hub outer peripheral face, the welding has the clutch inner shell on the connecting piston, the clutch inner shell sets up in the casing of clutch outer shell, the welding has the support ring on the clutch inner shell.

The clutch inner shell and the support ring are welded together to form a sub-assembly, the connecting piston and the main input hub are welded together to form another sub-assembly, and the last two sub-assemblies are welded together to form a main input hub welding assembly.

Preferably, the clutch piston and the clutch balance piston are axially arranged on the outer peripheral surface of the main input hub; the clutch piston is provided with a first annular groove and a second annular groove, the clutch inner shell is arranged in the first annular groove, a compression spring assembly is circumferentially arranged in the second annular groove, and the other end of the compression spring assembly is connected with the clutch balance piston.

Set up first ring channel in clutch piston is inside, can make the partial casing of clutch inner shell extend to first ring channel in, and set up the second ring channel, then be for the installation compression spring subassembly, conveniently cooperate the use with clutch balance piston to provide the effect of preload and resilience force.

Preferably, the thrust collar assembly comprises an inner thrust collar, one surface of the inner thrust collar facing the main input hub welding assembly is connected with a release bearing, an outer thrust collar is arranged outside the inner thrust collar, and the outer thrust collar and the brake shell are arranged in parallel.

When the brake needs to be closed, the outer thrust ring is driven to move by hydraulic pressure, the generated braking torque is finally transmitted through the output hub welded with the inner shell of the brake, when the brake needs to be opened, the pressure is reduced, the thrust borne by the outer thrust ring is reduced, the clutch piston is pushed by the inner thrust ring through the release bearing indirectly by hydraulic pressure, and the release bearing is needed to be used as a medium to digest the rotation speed difference because the clutch has the rotation speed and the inner thrust ring does not have the rotation speed and only moves axially.

Preferably, a plurality of integrally formed protruding blocks are circumferentially arranged on one surface, facing the brake shell, of the outer thrust ring, one ends of the protruding blocks extend into the brake shell, a plurality of spiral springs are circumferentially arranged between the outer thrust ring and the brake shell, and the number of the spiral springs is at least one.

The outer thrust ring can be pushed back to the original position by the elastic force provided by the spiral spring, one end of the spiral spring is arranged on the outer thrust ring, and the other end of the spiral spring is propped against the shell of the brake.

Preferably, a plurality of grooves are formed in the inner thrust ring and the outer thrust ring, and O-rings are arranged in the grooves.

The thrust that outer thrust ring received in the axial motion process is provided by the hydraulic pressure in its pressure chamber with the reducing gear box formation, and this pressure chamber is sealed by two O type circles of installing on outer thrust ring slot, and interior thrust ring and two O type circles of installing on its slot and reducing gear box are interior to constitute the pressure chamber jointly.

Preferably, the stopper shell towards a plurality of stopper steel sheets are installed to the one side axial of stopper inner shell, and pass through stopper snap ring on the stopper shell carries out the axial and supports, and is a plurality of be equipped with the stopper friction disc between the stopper steel sheet, the stopper friction disc sets up on the stopper inner shell, the clutch shell towards a plurality of clutch friction discs are installed to the one side axial of clutch inner shell, and is a plurality of clutch steel sheets are installed between the clutch friction disc.

The brake steel sheet is arranged in the brake outer shell, the brake steel sheet is connected with the opposite spline of the brake outer shell through the spline on the brake steel sheet, one more sheet is added at the tail end to improve the strength, a brake snap ring clamped on the brake outer shell provides axial support for the brake steel sheet when the brake is pressed, the brake friction sheet is arranged among the brake steel sheets to generate friction, the brake steel sheet is clamped on the brake inner shell through the spline on the brake friction sheet, the spline of the clutch steel sheet is connected with the opposite spline on the clutch inner shell, the clutch friction sheet is arranged among the clutch steel sheets, the clutch steel sheet and the clutch friction sheet are closed through the axial movement of the clutch piston, and the separation is realized through a compression spring assembly.

Preferably, the brake shell is provided with a plurality of splines, the splines are connected with the splines inside the reduction gearbox, and the brake shell is axially inserted into the splines inside the reduction gearbox and axially fixed through a snap ring inside the reduction gearbox.

The brake is conveniently installed in the reduction gearbox through the opponent spline on the brake shell, and is fixed through the clamping ring in the reduction gearbox.

Preferably, the main input hub is provided with an oil cavity and an oil hole.

An oil cavity and an oil hole are formed in the main input hub, and all parts can be cooled through matching with oil in the reduction gearbox.

The installation method of the clutch and brake integrated mechanism of the two-gear reduction box comprises the following steps:

step 1: welding the main input hub and the connecting piston together to form a sub-assembly, then welding the clutch inner shell and the support ring together to form another sub-assembly, and finally welding the two sub-assemblies together to form the main input hub welding component.

Step 2: on the basis of the step 1, after the main input hub assembly is assembled, the clutch balance piston is assembled to the main input hub welding assembly through clearance fit, the compression spring assembly is pre-installed in the clutch piston, and then the compression spring assembly is installed in the main input hub welding assembly as a whole to form the main input hub assembly.

And step 3: on the basis of the step 2, the clutch outer shell is assembled outside a shell of the clutch inner shell, the clutch steel sheet and the clutch friction sheet are installed between the clutch inner shell and the clutch outer shell, rivet holes are formed in the circumferential direction of the outer circumference of the clutch outer shell, the clutch outer shell and the brake inner shell are assembled together through rivets, then the brake outer shell is assembled outside the brake inner shell, the brake steel sheet and the brake friction sheet are assembled between the brake outer shell and the brake inner shell, and a brake snap ring is assembled on the brake outer shell.

And 4, step 4: and 3, axially connecting the release bearing on the clutch piston, assembling the inner thrust ring on the release bearing, connecting the outer thrust ring on the shell of the brake shell through a spiral spring, and integrally welding the integrated mechanism to the output hub.

The working principle is as follows: when the brake mechanism needs to be closed, the outer thrust ring is driven by hydraulic pressure to overcome the resistance of the spring to tightly press the brake steel sheet and the brake friction sheet, the generated brake torque is finally transmitted through the output hub welded with the brake inner shell, the pressure is reduced when the brake mechanism needs to be opened, the thrust borne by the outer thrust ring is reduced, the outer thrust ring is pushed back to the original position by the elastic force provided by the spring in the spiral spring assembly, one end of the spring is installed on the outer thrust ring, the other end of the spring is propped against the brake outer shell, the thrust borne by the outer thrust ring in the axial movement process is provided by the hydraulic pressure in a pressure cavity formed by the outer thrust ring and the whole shell, the pressure cavity is sealed by two O-shaped rings installed on the grooves of the outer thrust ring, the inner thrust ring and the two O-shaped rings installed on the grooves of the inner thrust ring are jointly formed by the pressure cavity, the main input hub welding assembly is formed by welding a main input hub, a connecting piston, a clutch inner shell and a support ring, a clutch balance piston is arranged in the main input hub welding assembly in a clearance fit mode, then a clutch steel sheet and a clutch friction sheet are arranged on the clutch inner shell, wherein a spline of the steel sheet is connected with a counter-spline on the clutch inner shell, a compression spring assembly is arranged in the clutch piston in advance and then is arranged in the main input hub welding assembly as a whole to form the main input hub assembly, the main input hub assembly is arranged in a corresponding shaft and is connected with the shaft through the spline on the main input hub, so that torque is transmitted, the main input hub is axially propped against a release bearing during assembly, the compression spring assembly is compressed to a certain degree to form preload, then a snap ring clamped on the shaft provides axial fixation, and the closing of the clutch steel sheet and the clutch friction sheet is performed by the axial movement of the clutch piston, the separation is realized by a compression spring assembly, a clutch piston is indirectly pushed by an inner thrust ring through a release bearing through hydraulic pressure, and the release bearing is required to be used as a medium to digest the rotation speed difference because the clutch mechanism has the rotation speed and the inner thrust ring does not move only in the axial direction.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the output ends of the clutch mechanism and the brake mechanism are integrated, and the mutual switching of two gear ratios of the planetary gear set in the gearbox is realized through the opening and closing of the clutch mechanism and the brake mechanism, so that the benefit and the economy of electric driving are effectively improved, and the requirements on the motor capacity and the battery capacity are reduced;

2. according to the invention, the working efficiency of the braking mechanism is enhanced through the outer thrust ring, the spiral spring assembly and the O-shaped ring, so that the braking mechanism can be closed and opened better;

3. the invention can eliminate the rotation speed difference caused by the running process of the clutch mechanism through the release bearing.

Drawings

FIG. 1 is a partial cross-sectional view of the present invention;

FIG. 2 is a cross-sectional view of the clutch balance piston, main input hub, clutch piston, inner thrust ring and release bearing of the present invention;

FIG. 3 is an exploded view of the clutch balance piston, main input hub, clutch piston, inner thrust ring and release bearing of the present invention;

fig. 4 is a perspective view of the present invention.

In the figure: 1. a brake housing; 2. a brake snap ring; 3. a brake inner housing; 4. a brake steel disc; 5. a brake friction plate; 6. a clutch housing; 7. a clutch inner housing; 8. a clutch friction plate; 9. a clutch steel disc; 10. a clutch balance piston; 11. a main input hub; 12. connecting a piston; 13. a support ring; 14. a clutch piston; 15. a compression spring assembly; 16. an outer thrust ring; 17. an inner thrust ring; 18. separating the bearing; 19. an O-shaped ring; 20. a coil spring; 21. an output hub.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1-4, the clutch and brake integrated mechanism of the two-gear reduction box includes a brake inner shell 3 and a clutch outer shell 6; the equal circumference of outer circumference of stopper inner shell 3 and clutch housing 6 is equipped with a plurality of rivet holes, be equipped with the rivet in a plurality of rivet holes and be in the same place stopper inner shell 3 and clutch housing 6 riveting, integrated mechanism welds on output hub 21, be equipped with main input hub subassembly in the integrated mechanism, main input hub subassembly includes main input welding subassembly, and the clutch piston 14 of axial installation on main input hub welding subassembly, circumference is equipped with compression spring subassembly 15 on the clutch piston 14, the one end that clutch piston 14 was kept away from to compression spring subassembly 15 is connected with clutch balance piston 10, clutch balance piston 10 axial installation is on main input welding subassembly, be connected with release bearing 18 on the main input welding subassembly, be equipped with the thrust ring subassembly on the release bearing 18, thrust ring subassembly and integrated mechanism parallel arrangement.

The integrated mechanism comprises a brake inner shell 3 and a clutch outer shell 6, wherein the brake inner shell 3 and the clutch outer shell 6 are connected together through rivets and welded on the same output hub 21; a brake outer shell 1 is arranged outside the shell of the brake inner shell 3, and a main input hub assembly is arranged inside the shell of the clutch outer shell 6; the main input hub assembly includes a main input hub weld assembly, and a clutch piston 14 disposed on the main input hub weld assembly; the clutch piston 14 is symmetrically arranged with the clutch balance piston 10 through a compression spring assembly 15, one end of the clutch balance piston 10 is installed on a main input hub welding assembly, a release bearing 18 is arranged at one end of the main input hub welding assembly, a thrust ring assembly is arranged on the release bearing 18, and the thrust ring assembly is arranged in parallel with the brake shell 1.

In this embodiment, when the brake mechanism needs to be closed, the outer thrust ring 16 is driven by hydraulic pressure to press the brake steel sheets 4 and the brake friction sheets 5 against the resistance of the spring, the generated braking torque is finally transmitted through the output hub 21 welded with the brake inner shell 3, when the brake mechanism needs to be opened, the pressure is reduced, the thrust applied to the outer thrust ring 16 is reduced, the outer thrust ring 16 is pushed back to the original position by the elastic force provided by the spring in the spiral spring 20 assembly, one end of the spring is installed on the outer thrust ring 16, the other end of the spring is pressed against the brake outer shell 1, the thrust applied to the outer thrust ring 16 during the axial movement is provided by the hydraulic pressure in a pressure chamber formed by the outer thrust ring and the whole shell, the pressure chamber is sealed by two O-rings 19 installed on the grooves of the outer thrust ring 16, the inner thrust ring 17 and the two O-rings 19 installed on the grooves form a pressure chamber, the other side of the inner thrust ring 17 is assembled with a release bearing 18 through clearance fit, a main input hub welding assembly is formed by welding a main input hub 11, a connecting piston 12, a clutch inner shell 7 and a support ring 13, a clutch balance piston 10 is assembled into the main input hub welding assembly through clearance fit, then a clutch steel sheet 9 and a clutch friction sheet 8 are assembled onto the clutch inner shell 7, wherein a spline of the steel sheet is connected with a counter-spline on the clutch inner shell 7, a compression spring assembly 15 is pre-assembled into a clutch piston 14 and then integrally assembled into the main input hub welding assembly to form the main input hub assembly, the main input hub assembly is assembled into a corresponding shaft and is connected with the shaft through the spline on the main input hub 11, so that torque is transmitted, the main input hub 11 is axially propped against the release bearing 18 during assembly, and the compression spring assembly 15 is compressed to a certain degree, thus, a preload is formed, then a snap ring clamped on a shaft provides axial fixation, the closing of the clutch steel sheet 9 and the clutch friction plate 8 is performed by the axial movement of the clutch piston 14, the separation is realized by the compression spring assembly 15, the clutch piston 14 is indirectly pushed by the inner thrust ring 17 through the release bearing 18 through hydraulic pressure, and the release bearing 18 is needed as a medium to absorb the rotation speed difference because the clutch mechanism has the rotation speed and the inner thrust ring 17 does not have the axial movement.

The main input hub welding assembly comprises a main input hub 11, a connecting piston 12 is welded on the outer peripheral surface of the main input hub 11, a clutch inner shell 7 is welded on the connecting piston 12, the clutch inner shell 7 is arranged in a shell of a clutch outer shell 6, and a support ring 13 is welded on the clutch inner shell 7.

The clutch inner housing 7 is welded to the support ring 13 to form one subassembly, the connecting piston 12 is welded to the main input hub 11 to form another subassembly, and the last two subassemblies are welded together to form the main input hub weld assembly.

The clutch piston 14 and the clutch balance piston 10 are axially arranged on the outer peripheral surface of the main input hub 11; a first annular groove and a second annular groove are formed in the clutch piston 14, a clutch inner shell 7 is arranged in the first annular groove, a compression spring assembly 15 is circumferentially arranged in the second annular groove, and the other end of the compression spring assembly 15 is connected with a clutch balance piston 10.

The first annular groove is formed in the clutch piston 14, so that part of the shell of the clutch inner shell 7 can extend into the first annular groove, and the second annular groove is formed, so that the compression spring assembly 15 is installed, the first annular groove is conveniently matched with the clutch balance piston 10 for use, and the preload and resilience effects are provided.

The thrust collar assembly comprises an inner thrust collar 17, one surface of the inner thrust collar 17 facing the main input hub welding assembly is connected with a release bearing 18, an outer thrust collar 16 is arranged outside the inner thrust collar 17, and the outer thrust collar 16 is arranged in parallel with the brake shell 1.

When the brake needs to be closed, the outer thrust ring 16 is driven to move by hydraulic pressure, the generated braking torque is finally transmitted through the output hub 21 welded with the brake inner shell 3, when the brake needs to be opened, the pressure is reduced, the thrust force borne by the outer thrust ring 16 is reduced, the clutch piston 14 is pushed by the inner thrust ring 17 through the release bearing 18 indirectly by the hydraulic pressure, and the release bearing 18 is needed to be used as a medium to absorb the difference of the rotating speeds because the clutch has the rotating speed and the inner thrust ring 17 has no rotating speed and only moves axially.

A plurality of integrally formed bumps are circumferentially arranged on one surface, facing the brake housing 1, of the outer thrust ring 16, one ends of the bumps extend into the brake housing 1, a plurality of spiral springs 20 are circumferentially arranged between the outer thrust ring 16 and the brake housing 1, and the number of the spiral springs 20 is at least 20.

The coil spring 20 is uniformly installed at the right side of the outer thrust collar 16, and the right side of the coil spring 20 is attached to the brake housing 1, wherein the outer thrust collar 16 can be pushed back to the original position by the elastic force provided by the coil spring 20 itself.

A plurality of grooves are formed in the inner thrust ring 17 and the outer thrust ring 16, and O-shaped rings 19 are arranged in the grooves.

The thrust received by the outer thrust ring 16 in the axial movement process is provided by the hydraulic pressure in a pressure cavity formed by the outer thrust ring and the reduction gearbox, the pressure cavity is sealed by two O-shaped rings 19 arranged on a groove of the outer thrust ring 16, and the inner thrust ring 17, the two O-shaped rings 19 arranged on the groove of the inner thrust ring and the reduction gearbox jointly form the pressure cavity.

A plurality of brake steel sheets 4 are installed to brake shell 1 towards the one side axial of brake inner shell 3 to carry out the axial through the stopper snap ring 2 on the brake shell 1 and support, be equipped with brake friction disc 5 between a plurality of brake steel sheets 4, brake friction disc 5 sets up on brake inner shell 3, a plurality of clutch friction discs 8 are installed to clutch shell 6 towards the one side axial of clutch inner shell 7, install a plurality of clutch steel sheets 9 between a plurality of clutch friction discs 8.

The brake steel sheet 4 is arranged in the brake outer shell 1, the brake steel sheet 4 is connected with the counter spline of the brake outer shell 1 through the spline on the brake steel sheet 4, one more sheet is added at the tail end to improve the strength, the brake snap ring 2 clamped on the brake outer shell 1 provides axial support for the brake steel sheet 4 when the brake is pressed, the brake friction sheet 5 is arranged among the brake steel sheets 4 to generate friction and is clamped on the brake inner shell 3 through the spline on the brake friction sheet 5, the spline of the clutch steel sheet 9 is connected with the counter spline on the clutch inner shell 7, the clutch friction sheet 8 is arranged among the clutch steel sheets 9, the clutch steel sheet 9 and the clutch friction sheet 8 are closed through the axial movement of the clutch piston 14, and the separation is realized through the compression spring assembly 15.

A plurality of splines are arranged on the brake shell 1, the splines are connected with the splines inside the reduction gearbox, and the brake shell 1 is axially inserted into the splines inside the reduction gearbox and axially fixed through a snap ring inside the reduction gearbox.

The brake is conveniently installed in the reduction gearbox through the opponent spline on the brake shell 1, and is fixed through the clamping ring in the reduction gearbox.

Example two

The embodiment is based on the first embodiment: the method for installing the clutch and brake integrated mechanism of the two-gear reduction box in the embodiment comprises the following steps:

step 1: the main input hub 11 and the connecting piston 12 are welded together to form one sub-assembly, then the clutch inner housing 7 and the support ring 13 are welded together to form another sub-assembly, and finally the two sub-assemblies are welded together to form the main input hub welded assembly.

Step 2: on the basis of the step 1, after the assembly of the main input hub assembly is finished, the clutch balance piston 10 is assembled on the main input hub welding assembly through clearance fit, the compression spring assembly 15 is pre-installed in the clutch piston 14, and then the compression spring assembly is installed in the main input hub welding assembly as a whole to form the main input hub assembly.

And step 3: on the basis of the step 2, a clutch outer shell 6 is assembled outside a shell of a clutch inner shell 7, a clutch steel sheet 9 and a clutch friction sheet 8 are installed between the clutch inner shell 7 and the clutch outer shell 6, a rivet hole is formed in the circumferential direction of the outer circumference of the clutch outer shell 6, the clutch outer shell 6 and a brake inner shell 3 are assembled together through rivets, then a brake outer shell 1 is assembled outside the brake inner shell 3, a brake steel sheet 4 and a brake friction sheet 5 are assembled between the brake outer shell 1 and the brake inner shell 3, and a brake snap ring 2 is assembled on the brake outer shell 1.

And 4, step 4: on the basis of step 3, a release bearing 18 is axially connected to the clutch piston 14, an inner thrust ring 17 is assembled to the release bearing 18, an outer thrust ring 16 is connected to the housing of the brake housing 1 via a helical spring 20, and the integrated mechanism is integrally welded to an output hub 21.

EXAMPLE III

In the present embodiment, an oil chamber and an oil hole are formed in the main input hub 11, based on the first embodiment.

In the embodiment, because the clutch and the brake can generate a large amount of heat in the closing and opening processes, active cooling needs to be performed through reduction gearbox oil, so that a relatively closed cavity and an oil hole are designed on the main input hub 11, oil supplied from an output shaft can be thrown out layer by layer outwards through the main input hub 11, the clutch inner shell 7, the clutch outer shell 6, the brake inner shell 3 and the brake outer shell 1 through centrifugal force caused by rotating speed in the radial direction, in the process, liquid can be uniformly dispersed onto each friction surface through holes designed on each shell, and flows through the friction surfaces from inside to outside in the radial direction, so that heat is taken away, and the cooling effect is achieved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.