Travel system for work machine, and work machine

Abstract

The utility model discloses a running system of operating machinery and operating machinery, the running system comprises an oil supply device, a driving device and a brake device, the driving device comprises a driving motor used for being in driving connection with wheels, the brake device comprises a brake disc and a brake, the brake disc is arranged on an output shaft of the driving motor, and the brake disc is arranged on the output shaft of the driving motor. The brake comprises a shell, a service braking piston cylinder and a parking braking piston cylinder, the shell is arranged on the driving motor, the service braking piston cylinder and the parking braking piston cylinder are arranged on the shell, a first friction plate is arranged on the service braking piston cylinder, and the service braking piston cylinder communicates with the oil supply device and is used for driving the first friction plate to brake the brake disc; a second friction plate is arranged on the parking brake piston cylinder, and the parking brake piston cylinder communicates with the oil supply device and is used for driving the second friction plate to brake the brake disc. The running system can be applied to the operation machine to conduct running braking and parking braking of the operation machine, and braking is stable and reliable.

Description

Technical Field

[0001] The utility model belongs to the technical field of travel systems, and in particular relates to a travel system of an operating machine and the operating machine. Background Art

[0002] Currently, traditional loaders are equipped with a transmission and drive axle, which drives the loader. The service brakes are primarily air-over-oil or fully hydraulic. By pressing the foot brake valve, high-pressure oil in the brake system actuates the brake caliper to achieve braking. Parking brakes are primarily achieved by brake fluid entering the transmission, which then applies the brake to the output shaft. However, in electric wheel-driven loaders, the wheels are driven by travel motors. Electric wheel loaders lack traditional transmissions and drive axles, making existing braking systems unsuitable for electric wheel loaders. Consequently, electric wheel loaders lack a reliable, integrated braking system. Utility Model Content

[0003] In view of the above-mentioned defects or shortcomings, the present invention provides a travel system of a working machine and a working machine, aiming to solve the technical problem that the existing braking system cannot be applied to electric wheel loaders.

[0004] In order to achieve the above-mentioned object, the present invention provides a travel system for a working machine, the travel system comprising:

[0005] Oil supply device;

[0006] A drive device, comprising a drive motor for driving connection to the wheels;

[0007] The braking device includes a brake disc and a brake. The brake disc is arranged on the output shaft of the driving motor. The brake includes a housing, a service brake piston cylinder and a parking brake piston cylinder. The housing is arranged on the driving motor. The service brake piston cylinder and the parking brake piston cylinder are arranged on the housing. A first friction plate is provided on the service brake piston cylinder. The service brake piston cylinder is connected to the oil supply device and is used to drive the first friction plate to brake the brake disc. A second friction plate is provided on the parking brake piston cylinder. The parking brake piston cylinder is connected to the oil supply device and is used to drive the second friction plate to brake the brake disc.

[0008] In an embodiment of the utility model, the oil supply device includes an oil supply assembly, an oil inlet valve group and a pipeline assembly, the oil inlet valve group includes a service brake valve and a parking brake valve, the pipeline assembly includes a service brake pipeline and a parking brake pipeline, the oil inlet of the service brake valve is connected to the oil supply assembly, the two ends of the service brake pipeline are respectively connected to the working oil port of the service brake valve and the service brake piston cylinder, the oil inlet of the parking brake valve is connected to the oil supply assembly, and the two ends of the parking brake pipeline are respectively connected to the working oil port of the parking brake valve and the parking brake piston cylinder.

[0009] In the embodiment of the utility model, the service brake pipeline includes a first oil inlet main path and two first oil inlet branch paths, one end of the first oil inlet main path is communicated with the working oil port of the service brake valve, the other end of the first oil inlet main path is branched and communicated with the two first oil inlet branch paths respectively, the number of the brake is consistent with the number of the first oil inlet branch path, the two first oil inlet branch paths are communicated with the service brake piston cylinder of the two brakes respectively, and the driving motor and the brake disc are consistent in number and are set one by one.

[0010] In the embodiment of the utility model, the parking brake pipeline includes a second oil inlet main path and two second oil inlet branch paths, one end of the second oil inlet main path is communicated with the working oil port of the parking brake valve, the other end of the second oil inlet main path is branched and communicated with the two second oil inlet branch paths respectively, and the two second oil inlet branch paths are communicated with the parking brake piston cylinder of the two brake devices respectively.

[0011] In the embodiment of the utility model, the service brake valve has two working oil ports, the number of the service brake pipeline is two, and the first oil inlet main path of the two service brake pipelines is communicated with the two working oil ports of the service brake valve one by one respectively;

[0012] And / or, the parking brake valve has two working oil ports, the number of the parking brake pipeline is two, and the second oil inlet main path of the two parking brake pipelines is communicated with the two working oil ports of the parking brake valve one by one respectively.

[0013] In the embodiment of the utility model, the oil supply assembly includes an oil tank and an oil supply pipeline, one end of the oil supply pipeline is communicated with the oil tank, the other end of the oil supply pipeline is branched and communicated with the oil inlet port of the service brake valve and the oil inlet port of the parking brake valve respectively, an oil pump and a liquid filling valve are arranged on the oil supply pipeline, and the oil pump is located between the liquid filling valve and the oil tank.

[0014] In the embodiment of the utility model, the driving motor is provided with a mounting seat, the mounting seat is formed with a mounting boss, and the shell is connected to the mounting boss through a first fastener.

[0015] In the embodiment of the utility model, the output shaft of the driving motor is provided with a spline part and a threaded part, and the spline part and the threaded part are sequentially arranged in the direction away from the mounting seat, the brake disc is provided with a spline sleeve, the spline sleeve is connected with the spline part, and the brake device further comprises a locking nut connected with the threaded part.

[0016] In the embodiment of the utility model, the driving device further comprises an axle housing, and the driving motor and the brake device are arranged in the axle housing, and an inspection opening is formed in the axle housing.

[0017] And / or, a pressure measuring connector is arranged on the shell.

[0018] In order to achieve the above-mentioned objectives, the present invention further provides a working machine, which includes the travel system of the working machine described above.

[0019] Through the above technical solution, the travel system of the working machine and the working machine provided by the embodiment of the utility model have the following beneficial effects:

[0020] In the technical solution of the present utility model, a driving motor is used to drive the working machine to move, and the brake disc is sleeved on the output shaft of the driving motor. The brake housing is connected to the driving motor. A service brake piston cylinder and a parking brake piston cylinder are provided in the housing. The service brake piston cylinder and the parking brake piston cylinder are respectively connected to the oil supply device, so that the oil supply device can supply oil to the service brake piston cylinder and the parking brake piston cylinder respectively; a first friction plate is connected to the service brake piston cylinder, and the oil supply device supplies oil to the service brake piston cylinder so that the service brake piston cylinder drives the first friction plate to abut against the brake disc to realize the service braking of the working machine; a second friction plate is connected to the parking brake piston cylinder, and when the oil supply device does not supply oil to the parking brake piston cylinder, the parking brake piston cylinder drives the second friction plate to abut against the brake disc to realize the parking braking of the working machine. The travel system of the present utility model can be applied to the working machine to perform service braking and parking braking of the working machine, and the braking is stable and reliable.

[0021] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without inventive work. In the drawings:

[0023] Figure 1 This is a schematic diagram of the assembly structure of the driving device and the braking device in the driving system according to one embodiment of the present utility model;

[0024] Figure 2 This is a schematic diagram of the exploded structure of the driving device and the braking device in the driving system according to one embodiment of the present utility model;

[0025] Figure 3 This is a schematic structural diagram of a braking device in a driving system according to an embodiment of the present utility model at one viewing angle;

[0026] Figure 4 This is a schematic structural diagram of a braking device in a driving system according to an embodiment of the present utility model from another perspective;

[0027] Figure 5 This is a schematic diagram of the oil circuits of the oil supply device and the brake device in the driving system according to one embodiment of the present utility model;

[0028] Figure 6 It is a schematic diagram of the oil circuits of the oil supply device and the brake device in the traveling system according to another embodiment of the present utility model.

[0029] Description of Reference Numerals

[0030] 10 Oil supply device 22 Axle housing

[0031] 11 Oil supply assembly 221 cover

[0032] 111 oil tank 23 reducer

[0033] 112 oil supply line 24 adapter sleeve

[0034] 113 Oil pump 30 Braking device

[0035] 114 Filling valve 31 Brake disc

[0036] 12 Service brake valve 311 spline sleeve

[0037] 13 Parking brake valve 312 Second fastener

[0038] 14 Service brake line 32 Brake

[0039] 141 First oil inlet main line 321 Shell

[0040] 142 First oil inlet branch 3211 Service brake oil inlet

[0041] 15 Parking brake line 3212 Parking brake oil inlet

[0042] 151 Second main oil inlet line 322 Service brake piston cylinder

[0043] 152 Second oil inlet branch 323 Parking brake piston cylinder

[0044] 20 Drive device 324 First friction plate

[0045] 21 Drive motor 325 Second friction plate

[0046] 211 output shaft 326 first fastener

[0047] 2111 Spline 33 Lock nut

[0048] 2112 Threaded part 34 Pressure measuring joint

[0049] 212 Mounting Seat 35 Adjusting Washer

[0050] 2121 Mounting boss DETAILED DESCRIPTION

[0051] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0052] The travel system of the working machine of the present invention will be described below with reference to the accompanying drawings.

[0053] like Figure 2 and Figure 5 As shown, the utility model provides a travel system of a working machine, which includes an oil supply device 10, a drive device 20 and a braking device 30. The drive device 20 includes a drive motor 21 for connecting to the wheel drive. The braking device 30 includes a brake disc 31 and a brake 32. The brake disc 31 is provided on the output shaft 211 of the drive motor 21. The brake 32 includes a housing 321, a service brake piston cylinder 322 and a parking brake piston cylinder 323. The housing 321 is provided on the drive motor 21. The service brake piston cylinder 322 and the parking brake piston cylinder 323 are provided on the housing 321. A first friction plate 324 is provided on the service brake piston cylinder 322. The service brake piston cylinder 322 is communicated with the oil supply device 10 and is used to drive the first friction plate 324 to brake the brake disc 31. A second friction plate 325 is provided on the parking brake piston cylinder 323. The parking brake piston cylinder 323 is communicated with the oil supply device 10 and is used to drive the second friction plate 325 to brake the brake disc 31.

[0054] It should be noted that the travel system of the present invention can be applied to an electric wheel loader to perform service braking and parking braking of the electric wheel loader, wherein the wheels of the electric wheel loader are drive-connected to the drive motor 21, so that the drive motor 21 can drive the wheels to rotate to realize the travel of the electric wheel loader. Those skilled in the art can understand that the travel system of the present invention is not limited to the above-mentioned application in the electric wheel loader, and can also be applied to electric wheel excavators, electric wheel bulldozers or other working machines that drive the wheels to rotate by motors. The present invention does not limit the type of working machines to which the travel system is applied. The embodiment of the present invention only takes the application of the travel system to the electric wheel loader as an example for explanation.

[0055] Specifically, the drive motor 21 is used to be connected to the wheel drive of the electric wheel loader to drive the wheel to rotate so that the electric wheel loader can move. The brake disc 31 is sleeved on the output shaft 211 of the drive motor 21. The housing 321 of the brake 32 is connected to the drive motor 21. A service brake piston cylinder 322 and a parking brake piston cylinder 323 are provided in the housing 321. The service brake piston cylinder 322 and the parking brake piston cylinder 323 are respectively connected to the oil supply device 10, so that the oil supply device 10 can supply oil to the service brake piston cylinder 322 and the parking brake piston cylinder 323 respectively; the piston rod of the service brake piston cylinder 322 extends to the housing 321 and is provided with and connected to the first friction plate 324. The oil supply device 10 supplies oil to the service brake piston cylinder 322 so that the service brake piston cylinder 322 drives the first friction plate 324 to abut against the brake disc 31 to brake the brake disc 31. When the brake disc 31 stops When the oil supply device 10 does not supply oil to the parking brake piston cylinder 323, the parking brake piston cylinder 323 drives the second friction plate 325 to abut against the brake disc 31 to brake the brake disc 31. When the brake disc 31 stops rotating, the output shaft 211 of the driving motor 21 also stops rotating, realizing the parking brake of the electric wheel loader. The travel system of the embodiment of the utility model can be applied to the electric wheel loader to perform the service braking and parking braking of the electric wheel loader. The braking is stable and reliable, and the service braking and parking braking are integrated on the brake 32, which has the advantages of small size and high degree of integration, improves space utilization, and is easy to assemble and maintain.

[0056] It can be understood that when the electric wheel loader is moving, the oil supply device 10 only supplies oil to the parking brake piston cylinder 323, so that the parking brake piston cylinder 323 drives the second friction plate 325 away from the brake disc 31, and the service brake piston cylinder 322 drives the first friction plate 324 away from the brake disc 31 when the oil supply device 10 does not supply oil to the service brake piston cylinder 322, thereby enabling the brake disc 31 to rotate along with the output shaft 211 of the drive motor 21 to realize the movement of the electric wheel loader; when the electric wheel loader is braking in service, the oil supply device 10 only supplies oil to the parking brake piston cylinder 323, so that the parking brake piston cylinder 323 drives the second friction plate 325 away from the brake disc 31, thereby enabling the parking brake piston cylinder 322 to drive the first friction plate 324 ... 0 supplies oil to the service brake piston cylinder 322, so that the service brake piston cylinder 322 drives the first friction plate 324 to abut against the brake disc 31 to achieve service braking of the electric wheel loader; when the electric wheel loader is in parking braking, the oil supply device 10 stops supplying oil, the service brake piston cylinder 322 drives the first friction plate 324 away from the brake disc 31, and the parking brake piston cylinder 323 drives the second friction plate 325 to abut against the brake disc 31 to achieve parking braking of the electric wheel loader. The structural design is reasonable and suitable for braking the entire machine in the electric wheel loader.

[0057] In an embodiment of the present utility model, the oil supply device 10 includes an oil supply component 11, an oil inlet valve group and a pipeline component. The oil inlet valve group includes a service brake valve 12 and a parking brake valve 13. The pipeline assembly includes a service brake pipeline 14 and a parking brake pipeline 15. The oil inlet of the service brake valve 12 is connected to the oil supply component 11, and the two ends of the service brake pipeline 14 are respectively connected to the working oil port of the service brake valve 12 and the service brake piston cylinder 322. The oil inlet of the parking brake valve 13 is connected to the oil supply component 11, and the two ends of the parking brake pipeline 15 are respectively connected to the working oil port of the parking brake valve 13 and the parking brake piston cylinder 323.

[0058] like Figure 5 and Figure 6 As shown, the oil supply component 11 can supply oil to the service brake piston cylinder 322 and the parking brake piston cylinder 323 respectively. When the oil supply component 11 supplies oil to the service brake piston cylinder 322, the oil flows from the oil supply component 11 through the oil inlet of the service brake valve 12 into the service brake valve 12, and then the oil flows from the working oil port of the service brake valve 12 into the service brake pipeline 14. The oil flows through the service brake pipeline 14 and enters the service brake piston cylinder 322, so that the service brake piston cylinder 322 drives the first friction plate 324 to brake the brake disc 31, thereby realizing the service braking of the electric wheel loader.

[0059] When the oil supply component 11 supplies oil to the parking brake piston cylinder 323, the oil flows from the oil supply component 11 through the oil inlet of the parking brake valve 13 into the parking brake valve 13, and then the oil flows from the working oil port of the parking brake valve 13 into the parking brake pipeline 15. The oil flows through the parking brake pipeline 15 and enters the parking brake piston cylinder 323, so that the parking brake piston cylinder 323 drives the second friction plate 325 to move away from the brake disc 31, thereby releasing the parking brake of the electric wheel loader; it can be understood that when the oil supply component 11 does not supply oil to the parking brake piston cylinder 323, the parking brake piston cylinder 323 drives the second friction plate 325 to brake the brake disc 31, thereby realizing the parking brake of the electric wheel loader.

[0060] In the embodiment of the present utility model, Figure 5 and Figure 6As shown, the service brake piston cylinder 322 and the parking brake piston cylinder 323 can be piston cylinders with return springs in the prior art. When oil is supplied to the service brake piston cylinder 322, the service brake piston cylinder 322 overcomes the elastic force of the return spring to drive the first friction plate 324 toward the brake disc 31 and into contact with the brake disc 31. When oil is not supplied to the service brake piston cylinder 322, the elastic restoring force of the return spring drives the first friction plate 324 away from the brake disc 31. When oil is supplied to the parking brake piston cylinder 323, the service brake piston cylinder 322 overcomes the elastic force of the return spring to drive the second friction plate 325 away from the brake disc 31. When oil is not supplied to the parking brake piston cylinder 323, the elastic restoring force of the return spring drives the second friction plate 325 toward the brake disc 31 and into contact with the brake disc 31. It should be noted that the structures of the service brake piston cylinder 322 and the parking brake piston cylinder 323 are well known to those skilled in the art and do not constitute the core improvements of this application, and thus will not be described in detail herein.

[0061] In an embodiment of the present utility model, the service brake pipeline 14 includes a first oil inlet main line 141 and two first oil inlet branches 142. One end of the first oil inlet main line 141 is connected to the working oil port of the service brake valve 12, and the other end of the first oil inlet main line 141 is branched and connected to the two first oil inlet branches 142 respectively. The number of brakes 32 is consistent with the number of first oil inlet branches 142. The two first oil inlet branches 142 are respectively connected to the service brake piston cylinders 322 of the two brakes 32, and the drive motors 21 and the brake discs 31 are consistent with the number of brakes 32 and are arranged one by one.

[0062] like Figure 5 As shown, one end of the first oil inlet main path 141 away from the service brake valve 12 is connected to two first oil inlet branches 142, each of which is correspondingly connected to the service brake piston cylinder 322 of a brake 32, and each brake 32 is correspondingly provided on a drive motor 21. Each drive motor 21 is respectively connected to a wheel driving connection of the electric wheel loader, so that the oil flowing through the first oil inlet main path 141 can synchronously drive the service brake piston cylinders 322 of the two brakes 32, thereby enabling the two brakes 32 to respectively apply service brakes to the two wheels of the electric wheel loader, effectively preventing the failure of service braking when one of the brakes 32 fails, thereby improving the reliability of service braking.

[0063] In an embodiment of the present utility model, the parking brake pipeline 15 includes a second oil inlet main line 151 and two second oil inlet branches 152. One end of the second oil inlet main line 151 is connected to the working oil port of the parking brake valve 13, and the other end of the second oil inlet main line 151 is branched and connected to the two second oil inlet branches 152 respectively. The two second oil inlet branches 152 are respectively connected to the parking brake piston cylinders 323 of the two braking devices 30.

[0064] like Figure 5 As shown, when the oil supply assembly 11 does not supply oil to the second main oil inlet path 151, the parking brake piston cylinders 323 of the two brakes 32 can respectively brake the corresponding drive motors 21, so that the two brakes 32 can respectively park the two wheels of the electric wheel loader, effectively preventing the parking brake from being unable to be performed when one of the brakes 32 fails, thereby improving the reliability of the parking brake.

[0065] Furthermore, one end of the second main oil inlet path 151 away from the parking brake valve 13 is connected to two second oil inlet branches 152. Each second oil inlet branch 152 is connected to the parking brake piston cylinder 323 of a brake 32. This allows the oil flowing through the second main oil inlet path 151 to synchronously drive the parking brake piston cylinders 323 of the two brakes 32. This allows the two brakes 32 to release the parking brakes on the two wheels of the electric wheel loader, respectively, thereby improving the stability and reliability of the driving system.

[0066] In an embodiment of the present utility model, the service brake valve 12 has two working oil ports, the number of the service brake lines 14 is set to two, and the first main oil inlet paths 141 of the two service brake lines 14 are respectively connected to the two working oil ports of the service brake valve 12 in a one-to-one correspondence; the parking brake valve 13 has two working oil ports, the number of the parking brake lines 15 is set to two, and the second main oil inlet paths 151 of the two parking brake lines 15 are respectively connected to the two working oil ports of the parking brake valve 13 in a one-to-one correspondence.

[0067] like Figure 6 As shown, the braking device 30 includes four brakes 32, which are respectively arranged on four drive motors 21. The four drive motors 21 are respectively used to drive the four wheels of the electric wheel loader. The oil supply device 10 includes two service brake pipes 14, and each service brake pipe 14 is used to connect the service brake piston cylinders 322 of the two brakes 32, so that the oil flowing through the service brake valve 12 can synchronously drive the service brake piston cylinders 322 of the four brakes 32, thereby enabling the four brakes 32 to respectively apply service brakes to the four wheels of the electric wheel loader, greatly improving the reliability of service braking. In addition, the parking brake piston cylinders 323 of the four brakes 32 can respectively apply parking brakes to the four wheels, greatly improving the reliability of parking braking.

[0068] It can be understood that the oil supply device 10 includes two parking brake pipes 15, each of which is used to connect the parking brake piston cylinders 323 of two brakes 32, so that the oil flowing through the parking brake valve 13 can synchronously drive the parking brake piston cylinders 323 of the four brakes 32, thereby enabling the four brakes 32 to release the parking brakes of the four wheels of the electric wheel loader respectively, further improving the stability and reliability of the driving system.

[0069] In a preferred embodiment of the present invention, Figure 5 and Figure 6 As shown, in each brake 32, the number of service brake piston cylinders 322 is set to four, and the number of parking brake piston cylinders 323 is set to two, wherein two service brake piston cylinders 322 are spaced apart and arranged on one side of the brake disc 31, and the other two service brake piston cylinders 322 are spaced apart and arranged on the other side of the brake disc 31, and each service brake piston cylinder 322 is connected to a first friction plate 324 for abutting against the brake disc 31, and the four service brake piston cylinders 322 are all connected to the same first oil inlet branch 142, so that the oil flowing through the first oil inlet branch 142 can synchronously drive the four service brake piston cylinders 322 to abut the brake disc 31. Braking is performed, thereby improving the reliability of service braking; and, the two parking brake piston cylinders 323 are respectively arranged on both sides of the brake disc 31, and each parking brake piston cylinder 323 is connected with a second friction plate 325 for abutting against the brake disc 31, so that the two parking brake piston cylinders 323 can brake the brake disc 31 synchronously, thereby improving the reliability of parking braking, and the two parking brake piston cylinders 323 are both connected to the same second oil inlet branch 152, so that the oil flowing through one second oil inlet branch 152 can synchronously drive the two parking brake piston cylinders 323 to release the brake on the brake disc 31, thereby improving the stability and reliability of the system.

[0070] In other embodiments of the present invention, the number of service brake piston cylinders 322 in each brake 32 can also be two, three or other numbers, and the number of parking brake piston cylinders 323 in each brake 32 can also be three, four or other numbers. The driving system of the present invention does not limit the number of service brake piston cylinders 322 and parking brake piston cylinders 323 in each brake 32.

[0071] In an embodiment of the present utility model, the oil supply assembly 11 includes an oil tank 111 and an oil supply pipeline 112. One end of the oil supply pipeline 112 is connected to the oil tank 111, and the other end of the oil supply pipeline 112 is branched and connected to the oil inlet of the service brake valve 12 and the oil inlet of the parking brake valve 13 respectively. An oil pump 113 and a filling valve 114 are provided on the oil supply pipeline 112, and the oil pump 113 is located between the filling valve 114 and the oil tank 111.

[0072] like Figure 5 and Figure 6 As shown, the oil pump 113 is used to pump the oil in the oil tank 111 into the filling valve 114. The oil flowing through the filling valve 114 can be respectively introduced into the service brake valve 12 and the parking brake valve 13, thereby realizing independent oil supply for service brake and parking brake. Service brake and parking brake do not interfere with each other, and braking is stable and reliable. Service brake and parking brake can be integrated through one brake 32, with a high degree of integration, which is convenient for assembly and maintenance. In addition, the filling valve 114 can effectively control the flow of oil, ensure the normal operation of the driving system, and further improve the reliability of the system.

[0073] In the embodiment of the present utility model, the driving motor 21 is provided with a mounting seat 212, and a mounting boss 2121 is formed on the mounting seat 212. The housing 321 is connected to the mounting boss 2121 through a first fastener 326. Figures 2 to 4 As shown, the drive device 20 also includes a reducer 23, one end of the drive motor 21 is drivingly connected to the reducer 23, and the reducer 23 is used to be drivingly connected to the wheel of the electric wheel loader, so that the drive motor 21 can drive the wheel to rotate through the reducer 23 to realize the movement of the electric wheel loader, and a mounting seat 212 is provided at the end of the drive motor 21 away from the reducer 23, and a mounting boss 2121 for mounting the housing 321 of the brake 32 is formed on the mounting seat 212, and the housing 321 is detachably connected to the mounting boss 2121 by a first fastener 326, and the assembly is convenient and quick; and an adjusting gasket 35 is provided on the side of the housing 321 facing the mounting boss 2121, and the adjusting gasket 35 is used to adjust the gap between the housing 321 and the mounting boss 2121 and prevent the connection from loosening, thereby improving the connection stability between the housing 321 and the mounting boss 2121.

[0074] Furthermore, the output shaft 211 of the driving motor 21 is provided with a spline portion 2111 and a threaded portion 2112, and the spline portion 2111 and the threaded portion 2112 are sequentially arranged in a direction away from the mounting seat 212. The brake disc 31 is provided with a spline sleeve 311, which is connected to the spline portion 2111. The brake device 30 also includes a locking nut 33, which is connected to the threaded portion 2112. Figures 2 to 4As shown, the spline sleeve 311 is sleeved on the spline portion 2111 to connect the brake disc 31 to the output shaft 211 of the drive motor 21, and the first friction plate 324 or the second friction plate 325 abuts against the brake disc 31 to limit the rotation of the brake disc 31, so that the output shaft 211 of the drive motor 21 can stop rotating along with the brake disc 31, thereby achieving the braking of the drive motor 21 and the connection is stable and reliable, and the spline sleeve 311 is detachably connected to the brake disc 31 through the second fastener 312, and the assembly is convenient and quick; in addition, the locking nut 33 is sleeved on the threaded portion 2112 and is threadedly connected to the threaded portion 2112, so that the locking nut 33 can cooperate with the drive motor 21 to limit the axial displacement of the spline sleeve 311, further improving the structural stability.

[0075] In the embodiment of the present invention, the driving device 20 further includes a bridge housing 22, the driving motor 21 and the braking device 30 are both arranged in the bridge housing 22, and an inspection port is provided on the bridge housing 22. Figure 1 and Figure 2 As shown, a drive motor 21 is respectively provided at both ends of the bridge housing 22, and each drive motor 21 and the corresponding brake device 30 are accommodated in the bridge housing 22. The bridge housing 22 plays a role in protecting the drive motor 21 and the brake device 30, so that the driving system can be applied to harsh working environments, thereby improving the versatility and reliability of the driving system. An inspection port is provided on the bridge housing 22, through which the pipes, cables or wiring harnesses in the bridge housing 22 can be conveniently inspected, thereby improving the convenience of inspection. In addition, a cover plate 221 connected to the bridge housing 22 is provided at the inspection port, and the cover plate 221 is used to block the inspection port to protect the drive motor 21 and the brake device 30 in the bridge housing 22. The structure is stable and reliable.

[0076] Furthermore, if Figure 1 and Figure 2 As shown, the drive device 20 also includes an adapter sleeve 24. The end of the drive motor 21 facing away from the braking device 30 is drive-connected to the reducer 23. The reducer 23 is drive-connected to the wheel so that the drive motor 21 can drive the wheel to rotate through the reducer 23. The connection between the reducer 23 and the drive motor 21 is covered with an adapter sleeve 24. The two ends of the adapter sleeve 24 are respectively connected to the reducer 23 and the bridge housing 22 one by one. The adapter sleeve 24 plays a role of transfer and protection, thereby improving the structural stability.

[0077] In the embodiment of the present utility model, the number of axle housings 22 is set to two, and each axle housing 22 is respectively provided with two drive motors 21, and each drive motor 21 is driven and connected to a wheel of the electric wheel loader, so that the four drive motors 21 on the two axle housings 22 can respectively drive the four wheels to rotate, and the four brakes 32 can respectively perform driving braking or parking braking on the four wheels, thereby improving braking reliability.

[0078] In the embodiment of the present utility model, Figure 3 As shown, a pressure measuring joint 34 is provided on the housing 321, which is used for exhausting and measuring the pressure of the brake 32, and is convenient and quick to use. In addition, a service brake oil inlet 3211 and a parking brake oil inlet 3212 are provided on the housing 321. The service brake oil inlet 3211 is used to communicate with the first oil inlet branch 142, so that the oil flowing through the first oil inlet branch 142 can be passed into the service brake piston cylinder 322 to drive the first friction plate 324, and the parking brake oil port is used to communicate with the second oil inlet branch 152, so that the oil flowing through the second oil inlet branch 152 can be passed into the parking brake piston cylinder 323 to drive the second friction plate 325, thereby realizing independent oil supply for service braking and parking braking, and integrating the service brake piston cylinder 322 and the parking brake piston cylinder 323 in the housing 321, thereby improving the structural integration.

[0079] In addition, the utility model also provides an operating machine, which includes a travel system of the operating machine described above, and the specific structure of the travel system refers to the above embodiment. Since the operating machine adopts all the technical solutions of the above embodiment, it at least has all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here one by one.

[0080] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0081] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0082] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

[0083] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present application.

Claims

1. A travel system for a working machine, characterized in that: The driving system includes: Oil supply device (10); A driving device (20) comprising a driving motor (21) for drivingly connecting to a wheel; A braking device (30) includes a brake disc (31) and a brake (32), wherein the brake disc (31) is arranged on an output shaft (211) of the drive motor (21), and the brake (32) includes a housing (321), a service brake piston cylinder (322), and a parking brake piston cylinder (323), wherein the housing (321) is arranged on the drive motor (21), and the service brake piston cylinder (322) and the parking brake piston cylinder (323) are arranged on the housing (321). The service brake piston cylinder (322) is provided with a first friction plate (324), the service brake piston cylinder (322) is communicated with the oil supply device (10) and is used to drive the first friction plate (324) to brake the brake disc (31), and the parking brake piston cylinder (323) is provided with a second friction plate (325), the parking brake piston cylinder (323) is communicated with the oil supply device (10) and is used to drive the second friction plate (325) to brake the brake disc (31).

2. The travel system of a working machine according to claim 1, wherein: The oil supply device (10) comprises an oil supply assembly (11), an oil inlet valve group and a pipeline assembly, wherein the oil inlet valve group comprises a service brake valve (12) and a parking brake valve (13), and the pipeline assembly comprises a service brake pipeline (14) and a parking brake pipeline (15). The oil inlet of the service brake valve (12) is communicated with the oil supply assembly (11), and the two ends of the service brake pipeline (14) are respectively communicated with the working oil port of the service brake valve (12) and the service brake piston cylinder (322). The oil inlet of the parking brake valve (13) is communicated with the oil supply assembly (11), and the two ends of the parking brake pipeline (15) are respectively communicated with the working oil port of the parking brake valve (13) and the parking brake piston cylinder (323).

3. The travel system of a working machine according to claim 2, wherein: The service brake pipeline (14) includes a first oil inlet main line (141) and two first oil inlet branches (142), one end of the first oil inlet main line (141) is connected to the working oil port of the service brake valve (12), and the other end of the first oil inlet main line (141) is branched and respectively connected to the two first oil inlet branches (142), the number of the brakes (32) is consistent with the number of the first oil inlet branches (142), the two first oil inlet branches (142) are respectively connected to the service brake piston cylinders (322) of the two brakes (32), and the driving motors (21) and the brake discs (31) are consistent with the number of the brakes (32) and are arranged in a one-to-one correspondence.

4. The travel system of a working machine according to claim 3, wherein: The parking brake pipeline (15) includes a second oil inlet main line (151) and two second oil inlet branches (152), one end of the second oil inlet main line (151) is connected to the working oil port of the parking brake valve (13), the other end of the second oil inlet main line (151) is branched and respectively connected to the two second oil inlet branches (152), and the two second oil inlet branches (152) are respectively connected to the parking brake piston cylinders (323) of the two braking devices (30).

5. The travel system of a working machine according to claim 4, characterized in that: The service brake valve (12) has two working oil ports, the number of the service brake pipelines (14) is set to two, and the first oil inlet main paths (141) of the two service brake pipelines (14) are respectively connected to the two working oil ports of the service brake valve (12) in a one-to-one correspondence; And / or, the parking brake valve (13) has two working oil ports, the number of the parking brake pipelines (15) is set to two, and the second oil inlet main paths (151) of the two parking brake pipelines (15) are respectively connected to the two working oil ports of the parking brake valve (13) in a one-to-one correspondence.

6. The travel system of a working machine according to claim 2, wherein: The oil supply assembly (11) comprises an oil tank (111) and an oil supply pipeline (112); one end of the oil supply pipeline (112) is in communication with the oil tank (111); the other end of the oil supply pipeline (112) branches off and is in communication with the oil inlet of the service brake valve (12) and the oil inlet of the parking brake valve (13), respectively; an oil pump (113) and a filling valve (114) are provided on the oil supply pipeline (112); and the oil pump (113) is located between the filling valve (114) and the oil tank (111).

7. The travel system of a working machine according to any one of claims 1 to 6, characterized in that: The drive motor (21) is provided with a mounting seat (212), a mounting boss (2121) is formed on the mounting seat (212), and the housing (321) is connected to the mounting boss (2121) via a first fastener (326).

8. The travel system of a working machine according to claim 7, characterized in that: The output shaft (211) of the drive motor (21) is provided with a spline portion (2111) and a threaded portion (2112), and the spline portion (2111) and the threaded portion (2112) are sequentially arranged in a direction away from the mounting seat (212); the brake disc (31) is provided with a spline sleeve (311), and the spline sleeve (311) is connected to the spline portion (2111); the brake device (30) further includes a locking nut (33), and the locking nut (33) is connected to the threaded portion (2112).

9. The travel system of a working machine according to any one of claims 1 to 6, characterized in that: The driving device (20) further includes a bridge housing (22), the driving motor (21) and the braking device (30) are both arranged in the bridge housing (22), and an inspection port is provided on the bridge housing (22); And / or, a pressure measuring joint (34) is provided on the housing (321).

10. A working machine, characterized in that: The working machine includes the travel system for a working machine according to any one of claims 1 to 9.

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