Hydraulic differential lock device for drive axle

Abstract

A hydraulic differential lock device for a drive axle comprises a hydraulic differential lock device body provided with a differential mechanism (1), a half axle housing (2) and a half shaft (5), a piston sleeve (3) arranged in the half axle housing (2), a meshing sleeve (4) arranged between the piston sleeve (3) and the differential mechanism (1) and between the piston sleeve (3) and the half shaft (5), and a reset spring (6) arranged between the meshing sleeve (4) and the differential mechanism (1). According to the hydraulic differential lock device, a driving wheel is driven to rotate, through a piston sleeve (3), a meshing sleeve (4) and a reset spring (6), the connecting state of a differential mechanism (1) and a half shaft (5) in the hydraulic differential lock device body is switched through high-pressure liquid, and the high-pressure liquid driving process serves as the driving mode of the driving wheel to be switched; the technical problem that friction between parts serves as locking acting force is solved, and therefore high-pressure liquid serves as the locking acting force.

Description

Technical Field

[0001] The utility model relates to a hydraulic differential lock device, in particular to a hydraulic differential lock device for a drive axle. Background Art

[0002] As an important control device of the transmission system of engineering machinery, the differential lock has the main function of enhancing the vehicle's ability to pass under complex road conditions. When the engineering machinery is driving on bad roads, such as mud, snow or sand, the different adhesion between each wheel and the ground may cause the drive wheel to slip or spin. At this time, the differential lock comes into play, quickly locking the differential, making the drive axles rigidly connected. Therefore, the hydraulic differential lock device is an important engineering machinery component. There is no hydraulic differential lock device for drive axles. Among the existing differential lock devices, the first method: high friction self-locking differential lock is locked by friction plates or slider cams. This differential lock is more common in cars and light vehicles. It has a simple structure and works smoothly. However, the structure of the slider cam type is relatively complex and has high processing precision, so the cost is relatively high. The second method: Torsen type The differential is an advanced inter-axle differential, which is widely used in all-wheel drive cars. Its working principle is based on the self-locking characteristics of worm gear transmission, and it has high sensitivity and efficiency. The third method: viscous coupling differential uses silicone oil as the transmission medium. When the speed difference between the two axles is too large, the silicone oil temperature rises and the volume expands, pushing the friction blades to combine tightly to achieve the locking of the differential. This phenomenon is called "hump phenomenon", which is the uniqueness of viscous coupling differential. It still uses friction between components as the locking force, and has not yet used high-pressure liquid as the locking force.

[0003] The utility model uses the high-pressure liquid driving process as the technical feature to switch the driving mode of the driving wheel, and conducts effective exploration and research on the technical problem of using the friction between components as the locking force.

[0004] The statements here only provide background technology related to the utility model and do not necessarily constitute prior art. The technical solution of the application of the present invention is made based on the technical briefing document provided by the applicant on February 16, 2024, which solves actual technical problems in the work process, and the existing technical problems, technical features and technical effects in the similar patent literature and background technology obtained through retrieval. Summary of the invention

[0005] The object of the utility model is a hydraulic differential lock device for a drive axle.

[0006] In order to overcome the above technical shortcomings, the purpose of the utility model is to provide a hydraulic differential lock device for a drive axle, thereby realizing the use of high-pressure liquid as a locking force.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: it includes a hydraulic differential lock device body having a differential, a half-bridge housing and a half-axle, a piston sleeve arranged in the half-bridge housing, an engagement sleeve arranged between the piston sleeve and the differential and the half-axle, and a return spring arranged between the engagement sleeve and the differential.

[0008] Due to the design of the hydraulic differential lock device body, piston sleeve, engagement sleeve and return spring, the driving wheel can be driven to rotate through the hydraulic differential lock device body, and the high-pressure liquid can switch the connection state between the differential and the half-axle in the hydraulic differential lock device body through the piston sleeve, engagement sleeve and return spring, and the high-pressure liquid driving process can be used as the driving mode of the driving wheel to switch, which solves the technical problem of using friction between components as the locking force, thereby realizing the use of high-pressure liquid as the locking force.

[0009] The utility model is designed to connect the hydraulic differential lock device body, the piston sleeve, the engagement sleeve and the return spring to each other in a manner of switching the driving mode of the driving wheel by using the high-pressure liquid driving process.

[0010] The utility model is designed to connect the piston sleeve, the engagement sleeve and the return spring with the hydraulic differential lock device body in a manner that the connection state of the differential and the half shaft in the hydraulic differential lock device body is switched by high-pressure liquid.

[0011] The utility model is designed that the hydraulic differential lock device body is arranged to further include a supporting bearing.

[0012] The technical effects of the above four technical solutions are: highlighting the technical feature of using high-pressure liquid driving process as a means of switching the driving mode of the driving wheel, and introducing the application in the technical field of hydraulic differential lock devices for drive axles.

[0013] The utility model is designed to further include a first accessory device, and the first accessory device is arranged in the hydraulic differential lock device body, and the first accessory device is arranged as a clip spring.

[0014] The utility model is designed to further include a second accessory device, and the second accessory device is arranged between the piston sleeve and the hydraulic differential lock device body, and the second accessory device is arranged as a sealing ring.

[0015] The technical effects of the above two technical solutions are: realizing the integrated installation of other components and expanding the technical effects of the utility model.

[0016] The utility model is designed that a differential and a half-bridge housing are respectively arranged on a supporting bearing, a retaining spring is respectively arranged between the supporting bearing and the differential and the half-bridge housing, a piston sleeve is arranged on the half-bridge housing, a sealing ring is arranged between the piston sleeve and the half-bridge housing, an engaging sleeve is arranged between the piston sleeve and the differential, a return spring is arranged between the engaging sleeve and the differential, and a half shaft is arranged on the engaging sleeve.

[0017] The technical effect of the above technical scheme is that the basic technical scheme of the utility model is formed by the differential, half-bridge housing, piston sleeve, meshing sleeve, half-shaft, return spring, support bearing, retaining spring and sealing ring, which solves the technical problem of the utility model.

[0018] The utility model is designed that the piston sleeve is arranged as a convex-shaped disc-shaped body having a receiving hole body III and a bevel body is arranged on the inner edge of the expansion part of the piston sleeve, the piston sleeve is arranged to be connected with the half-bridge housing in a through-type manner, the peripheral side surface of the expansion part of the piston sleeve and the peripheral side surface of the contraction part of the piston sleeve are respectively arranged to be connected with the sealing ring in a receiving manner and the receiving hole body III is arranged to be connected with the meshing sleeve, the receiving hole body III is arranged as a convex-shaped hole-shaped body and the bevel body is arranged as an annular bevel body.

[0019] The technical effect of the above technical solution is that a transversely movable piston body is arranged in the half bridge housing.

[0020] The utility model is designed that the meshing sleeve is arranged as a convex U-shaped disc-shaped body having a receiving hole body IV and a spline groove body II is arranged on the inner wall of the extended portion of the meshing sleeve, the meshing sleeve is arranged to be through-connected with the piston sleeve and the contraction portion of the receiving hole body IV is arranged to be connected with the half shaft, the extended portion of the receiving hole body IV is arranged to be connected with the return spring and the step body of the receiving hole body IV is arranged to be contact-connected with the return spring, the spline groove body II is arranged to be meshedly connected with the differential and the receiving hole body IV is arranged as a convex U-shaped hole-shaped body, and the spline groove body II is arranged as a U-shaped spline groove.

[0021] The technical effect of the above technical solution is to achieve a butt connection between the spline slot body and the differential.

[0022] The utility model is designed that the return spring is arranged as a column spring and is arranged to be sleeve-type connected with the half shaft, one end of the return spring is arranged to be contact-type connected with the differential and the other end of the return spring is arranged to be contact-type connected with the meshing sleeve.

[0023] The technical effect of the above technical solution is that elastic energy storage is realized as a separation force.

[0024] The utility model designs that the differential is set as a differential body with a housing part I, a housing part II and connecting bolts, and the ends of the connecting bolts are respectively set to be threadedly connected with the housing part I and the housing part II. The flange body of the connecting bolt is set to be in contact connection with the outer end face edge part of the housing part I, and the inner end face part of the housing part I is set to be in contact connection with the inner end face part of the housing part II. A spline groove body I is arranged on the peripheral side face of the end of the transverse part of the housing part I, and a receiving hole body I is arranged on the outer end face of the transverse part. The transverse part is set to be in through connection with a support bearing and a snap ring located on the outer end face of the support bearing, and the spline groove body I is set to be in meshing connection with a meshing sleeve. The receiving hole body I is respectively set to be connected with a half shaft and a return spring, and the housing part I and the housing part II are respectively set to be convex-shaped cylindrical bodies. The connecting bolt is set to be a hexagonal bolt, and the transverse part is set to be a circular cylindrical body. The spline groove body I is set to be a C-shaped spline groove, and the receiving hole body I is set to be a convex-shaped hole body. The extension body of the receiving hole body I is set to be connected with the half shaft and the return spring, and the stepped body of the receiving hole body I is set to be in contact connection with the return spring.

[0025] The utility model designs that a receiving hole body II is arranged in the inner end face part of the half axle housing, and an oil passage hole body is arranged on the inner end of the half axle housing. The inside of the receiving hole body II is set to be connected with a support bearing, and the outside of the receiving hole body II is set to be connected with a piston sleeve. The inner end face part of the half axle housing is set to be in contact connection with a snap ring located on the outer end face of the support bearing, and the inner side part of the peripheral inner wall of the receiving hole body II is set to be in snap ring receiving connection with the inner end face part of the support bearing. The outer side part of the peripheral inner wall of the receiving hole body II is set to be in sealing ring receiving connection, and the receiving hole body II is set to be a blind hole body with a middle flange ring part. The middle flange ring part of the receiving hole body II is set to be in contact connection with the piston sleeve, and the oil passage hole body is set to be a hole body. The inner end port part of the oil passage hole body is arranged on the inner wall of the receiving hole body II and is set to be distributed corresponding to the piston sleeve.

[0026] The utility model designs that the support bearing is set to be a thrust roller bearing, and the inner ring part of the support bearing is set to be in sleeve connection with the differential. The outer ring part of the support bearing is set to be in through connection with the half axle housing, and the end face part of the support bearing is set to be in contact connection with the snap ring.

[0027] The utility model designs that the half shaft is set to be a shaft body, and the inside of the end of the half shaft is set to be in through connection with the meshing sleeve. The end of the half shaft is set to be in through connection with the return spring.

[0028] The technical effects of the above four technical solutions are as follows: realizing torque-driven rotation of the driving wheels.

[0029] The utility model is designed that the retaining spring is arranged as a shaft retaining spring and the retaining spring located on the outer end surface portion of the support bearing is arranged to be connected with the differential sleeve type, the outer end surface portion of the retaining spring located on the outer end surface portion of the support bearing is arranged to be connected with the differential in a contacting manner and the inner end surface portion of the retaining spring located on the outer end surface portion of the support bearing is arranged to be connected with the support bearing in a contacting manner, the retaining spring located on the inner end surface portion of the support bearing is arranged to be embedded with the half-bridge housing and the inner end surface portion of the retaining spring located on the inner end surface portion of the support bearing is arranged to be connected with the support bearing in a contacting manner.

[0030] The technical effect of the above technical solution is that the support bearing is installed and connected between the differential and the half-bridge housing.

[0031] The utility model is designed that the sealing ring is arranged as an O-shaped sealing ring, the outer periphery of the sealing ring is arranged to be embeddedly connected with the half bridge housing, and the inner periphery of the sealing ring is arranged to be contact-connected with the piston sleeve.

[0032] The technical effect of the above technical solution is that sealing between the piston sleeve and the half-bridge housing is achieved.

[0033] The utility model is designed that the differential, half bridge housing, half shaft and supporting bearing are arranged to be distributed with the piston sleeve, meshing sleeve and return spring in a piston driven docking manner, and the differential, half bridge housing, half shaft, supporting bearing, piston sleeve, meshing sleeve and return spring are arranged to be distributed with the retaining spring in a clamping installation manner, and the differential, half bridge housing, half shaft, supporting bearing, piston sleeve, meshing sleeve and return spring are arranged to be distributed with the sealing ring in a sealing installation manner.

[0034] The utility model is designed that the center line of the differential, the center line of the half bridge housing, the center line of the piston sleeve, the center line of the meshing sleeve, the center line of the half shaft, the center line of the return spring, the center line of the support bearing, the center line of the retaining spring and the center line of the sealing ring are arranged on the same straight line, two retaining springs are arranged between the support bearing and the differential and the half bridge housing, two sealing rings are arranged between the piston sleeve and the half bridge housing, the spline groove body II is arranged to be connected with the spline groove body I, the accommodation hole body II and the inclined surface body are arranged to form an oil cavity body, and the inner end port portion of the oil channel hole body is arranged to be distributed corresponding to the oil cavity located between the accommodation hole body II and the inclined surface body.

[0035] In the present technical scheme, the piston sleeve, the engagement sleeve and the return spring are basic components and are also the necessary technical features of the present utility model; the differential, the half-bridge housing, the half-shaft, the support bearing, the retaining spring and the sealing ring are functional components and are the features for realizing other technical effects of the present utility model; the designs of the technical features of the shell part I, the shell part II, the connecting bolts, the cross part, the spline groove body I, the accommodating hole body I, the accommodating hole body II, the oil channel hole body, the accommodating hole body III, the ramp body, the accommodating hole body IV and the spline groove body II are technical features that comply with the Patent Law and its implementing rules.

[0036] In the present technical solution, the high-pressure liquid driving process for switching the driving mode of the driving wheel is realized by the piston sleeve, the engagement sleeve and the return spring.

[0037] In the present technical solution, the hydraulic differential lock device body, piston sleeve, engagement sleeve and return spring that use the high-pressure liquid driving process as the driving mode switching of the driving wheel are important technical features. In the technical field of hydraulic differential lock devices for drive axles, it has novelty, creativity and practicality. The terms in the present technical solution can be explained and understood using the patent literature in this technical field. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 It is a schematic diagram of the utility model.

[0040] Differential-1, half-bridge housing-2, piston sleeve-3, meshing sleeve-4, half shaft-5, return spring-6, support bearing-7, retaining spring-8, sealing ring-9, housing part I-11, housing part II-12, connecting bolt-13, cross part-14, spline groove body I-15, receiving hole body I-16, receiving hole body II-22, oil channel hole body-21, receiving hole body III-31, ramp body-32, receiving hole body IV-41, spline groove body II-42. DETAILED DESCRIPTION

[0041] According to the Examination Guidelines, terms such as “having”, “including” and “comprising” used in the present invention should be understood as not precluding the existence or addition of one or more other elements or combinations thereof.

[0042] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as they do not conflict with each other. In addition, unless otherwise specified, the equipment and materials used in the following embodiments are commercially available. If the processing conditions are not clearly stated, please refer to the purchased product manual or proceed according to conventional methods in the field.

[0045] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0046] Figure 1 This is the first embodiment of the utility model, which is specifically described in conjunction with the accompanying drawings. It includes a differential 1, a half-bridge housing 2, a piston sleeve 3, a meshing sleeve 4, a half-shaft 5, a return spring 6, a support bearing 7, a retaining spring 8 and a sealing ring 9, and the differential 1 and the half-bridge housing 2 are respectively arranged on the support bearing 7, the retaining spring 8 is respectively arranged between the support bearing 7 and the differential 1 and the half-bridge housing 2, and the piston sleeve 3 is arranged on the half-bridge housing 2, the sealing ring 9 is arranged between the piston sleeve 3 and the half-bridge housing 2, and the meshing sleeve 4 is arranged between the piston sleeve 3 and the differential 1, the return spring 6 is arranged between the meshing sleeve 4 and the differential 1, and the half-shaft 5 is arranged on the meshing sleeve 4.

[0047] In this embodiment, the differential 1 is set as a differential body having a housing part I 11, a housing part II 12 and connecting bolts 13, and the ends of the connecting bolts 13 are respectively set to be threadedly coupled with the housing part I 11 and the housing part II 12. The flange body of the connecting bolt 13 is set to be in contact coupling with the outer end face edge part of the housing part I 11, and the inner end face part of the housing part I 11 is set to be in contact coupling with the inner end face part of the housing part II 12. A spline groove body I 15 is provided on the peripheral side face of the end of the transverse part 14 of the housing part I 11, and a receiving hole body I 16 is provided on the outer end face of the transverse part 14. The transverse part 14 is set to be in through coupling with the support bearing 7 and a snap ring 8 located on the outer end face of the support bearing 7, and the spline groove body I 15 is set to be in meshing coupling with the engaging sleeve 4. The receiving hole body I 16 is respectively set to be coupled with the half shaft 5 and the return spring 6, and the housing part I 11 and the housing part II 12 are respectively set as convex-shaped cylindrical bodies. The connecting bolt 13 is set as a hexagonal bolt, and the transverse part 14 is set as a circular cylindrical body. The spline groove body I 15 is set as a U-shaped spline groove, and the receiving hole body I 16 is set as a convex-shaped hole body. The extended body of the receiving hole body I 16 is set to be coupled with the half shaft 5 and the return spring 6, and the stepped body of the receiving hole body I 16 is set to be in contact coupling with the return spring 6.

[0048] Through the differential 1, support connection points for the engaging sleeve 4, the half shaft 5, the return spring 6, the support bearing 7 and the snap ring 8 are formed. Through the spline groove body I 15, the connection with the engaging sleeve 4 is achieved, and the connection with the half shaft 5 is achieved. Through the receiving hole body I 16, the connection with the return spring 6 is achieved. Through the transverse part 14, the connection with the support bearing 7 is achieved, and the connection with the snap ring 8 is achieved. Through the housing part I 11, the housing part II 12 and the connecting bolts 13, it is realized as the housing of the differential 1. Its technical purpose is: to be used as a component for enabling the left and right or front and rear drive wheels to rotate at different speeds.

[0049] In this embodiment, a receiving hole body II 22 is provided in the inner end face part of the half axle housing 2, and an oil passage hole body 21 is provided at the inner end of the half axle housing 2. The inside of the receiving hole body II 22 is set to be coupled with the support bearing 7, and the outside of the receiving hole body II 22 is set to be coupled with the piston sleeve 3. The inner end face part of the half axle housing 2 is set to be in contact coupling with a snap ring 8 located on the outer end face of the support bearing 7, and the inner side part of the peripheral inner wall of the receiving hole body II 22 is set to be in receiving coupling with a snap ring 8 located on the inner end face of the support bearing 7. The outer side part of the peripheral inner wall of the receiving hole body II 22 is set to be in receiving coupling with a sealing ring 9, and the receiving hole body II 22 is set as a blind hole body having an intermediate flange ring part. The intermediate flange ring part of the receiving hole body II 22 is set to be in contact coupling with the piston sleeve 3, and the oil passage hole body 21 is set as a hole body. The inner end port part of the oil passage hole body 21 is provided on the inner wall of the receiving hole body II 22 and is set to be distributed corresponding to the piston sleeve 3.

[0050] Through the half bridge housing 2, a supporting connection point for the piston sleeve 3, the supporting bearing 7, the retaining spring 8 and the sealing ring 9 is formed. The connection with the piston sleeve 3 is realized by the accommodating hole body II22 and the oil channel hole body 21. The connection with the support bearing 7 is realized by the accommodating hole body II22. The connection with the sealing ring 9 is realized. The connection with the retaining spring 8 is realized by the half bridge housing 2 and the accommodating hole body II22. The technical purpose is to be used as a supporting carrier for the piston sleeve 3.

[0051] In this embodiment, the support bearing 7 is configured as a thrust roller bearing and the inner ring portion of the support bearing 7 is configured to be sleeve-connected to the differential 1, the outer ring portion of the support bearing 7 is configured to be through-connected to the half-bridge housing 2 and the end surface portion of the support bearing 7 is configured to be contact-connected to the retaining spring 8.

[0052] A supporting connection point for the differential 1, the half-bridge housing 2 and the retaining spring 8 is formed by the supporting bearing 7. The supporting bearing 7 realizes connection with the differential 1, connection with the half-bridge housing 2 and connection with the retaining spring 8. Its technical purpose is to serve as a component for connecting the differential 1 and the half-bridge housing 2.

[0053] In this embodiment, the retaining spring 8 is arranged as a shaft retaining spring and the retaining spring 8 located on the outer end face portion of the support bearing 7 is arranged to be connected in a sleeve-type manner with the differential 1, the outer end face portion of the retaining spring 8 located on the outer end face portion of the support bearing 7 is arranged to be connected in a contacting manner with the differential 1 and the inner end face portion of the retaining spring 8 located on the outer end face portion of the support bearing 7 is arranged to be connected in a contacting manner with the support bearing 7, the retaining spring 8 located on the inner end face portion of the support bearing 7 is arranged to be embedded in the half-bridge housing 2 and the inner end face portion of the retaining spring 8 located on the inner end face portion of the support bearing 7 is arranged to be connected in a contacting manner with the support bearing 7.

[0054] A supporting connection point for the differential 1, the half-bridge housing 2 and the support bearing 7 is formed by the retaining spring 8. The retaining spring 8 realizes the connection with the differential 1, the connection with the half-bridge housing 2 and the connection with the support bearing 7. Its technical purpose is to serve as a component for connecting the support bearing 7 with the differential 1 and the half-bridge housing 2.

[0055] In the present embodiment, the piston sleeve 3 is configured as a convex-shaped disc-shaped body having a accommodating hole body III31 and a bevel body 32 is provided on the inner edge of the extended portion of the piston sleeve 3, the piston sleeve 3 is configured to be through-connected with the half-bridge housing 2, the peripheral side surface of the extended portion of the piston sleeve 3 and the peripheral side surface of the contracted portion of the piston sleeve 3 are respectively configured to be accommodatingly connected with the sealing ring 9 and the accommodating hole body III31 is configured to be connected with the meshing sleeve 4, the accommodating hole body III31 is configured to be a convex-shaped hole-shaped body and the bevel body 32 is configured to be an annular bevel body.

[0056] The piston sleeve 3 forms a supporting connection point for the half-bridge housing 2, the meshing sleeve 4 and the sealing ring 9. The piston sleeve 3 realizes the connection with the half-bridge housing 2 and the sealing ring 9. The meshing sleeve 4 realizes the connection with the meshing sleeve 4. The inclined surface 32 realizes the formation of an oil cavity with the half-bridge housing 2. The technical purpose is to be used as a component for driving the meshing sleeve 4 to move in the half-bridge housing 2.

[0057] In this embodiment, the engaging sleeve 4 is configured to be a convex-shaped disc-shaped body having a accommodating hole body IV41 and a spline groove body II42 is provided on the inner wall of the extended portion of the engaging sleeve 4, the engaging sleeve 4 is configured to be through-connected with the piston sleeve 3 and the contraction portion of the accommodating hole body IV41 is configured to be connected with the half-shaft 5, the extended portion of the accommodating hole body IV41 is configured to be connected with the return spring 6 and the step body of the accommodating hole body IV41 is configured to be contact-connected with the return spring 6, the spline groove body II42 is configured to be meshingly connected with the differential 1 and the accommodating hole body IV41 is configured to be a convex-shaped hole-shaped body, and the spline groove body II42 is configured to be a U-shaped spline groove.

[0058] Through the engaging sleeve 4, a supporting connection point for the differential 1, the piston sleeve 3, the half shaft 5 and the return spring 6 is formed. The spline groove body II42 realizes the connection with the differential 1, the engaging sleeve 4 realizes the connection with the piston sleeve 3, the accommodating hole body IV41 realizes the connection with the half shaft 5, and the connection with the return spring 6 is realized. The technical purpose is to be used as one of the components for connecting the differential 1 and the half shaft 5.

[0059] In this embodiment, the return spring 6 is configured as a columnar spring and the return spring 6 is configured to be sleeve-connected to the half-shaft 5, one end of the return spring 6 is configured to be contact-connected to the differential 1 and the other end of the return spring 6 is configured to be contact-connected to the engagement sleeve 4.

[0060] A supporting connection point for the differential 1, the engagement sleeve 4 and the half-shaft 5 is formed by the return spring 6. The return spring 6 realizes the connection with the differential 1, the engagement sleeve 4 and the half-shaft 5. The technical purpose is to serve as the second component for connecting the differential 1 and the half-shaft 5.

[0061] In this embodiment, the half shaft 5 is configured as a shaft-shaped body and the interior of the end of the half shaft 5 is configured to be through-connected with the engagement sleeve 4 , and the end of the half shaft 5 is configured to be through-connected with the return spring 6 .

[0062] A supporting connection point for the engagement sleeve 4 and the return spring 6 is formed through the half shaft 5. The half shaft 5 realizes connection with the engagement sleeve 4 and connection with the return spring 6. The technical purpose is to serve as a component for connecting the differential 1 and the drive wheel.

[0063] In this embodiment, the sealing ring 9 is configured as an O-ring and the outer periphery of the sealing ring 9 is configured to be embeddedly connected to the half-bridge housing 2 , and the inner periphery of the sealing ring 9 is configured to be contact-connected to the piston sleeve 3 .

[0064] A supporting connection point for the half-bridge housing 2 and the return spring 6 is formed by the sealing ring 9. The sealing ring 9 realizes the connection with the half-bridge housing 2 and the connection with the piston sleeve 3. The technical purpose is to serve as a component for sealing connection between the piston sleeve 3 and the half-bridge housing 2.

[0065] In this embodiment, the differential 1, the half-bridge housing 2, the half-shaft 5 and the support bearing 7 are arranged to be distributed with the piston sleeve 3, the meshing sleeve 4 and the return spring 6 in a piston drive docking manner, and the differential 1, the half-bridge housing 2, the half-shaft 5, the support bearing 7, the piston sleeve 3, the meshing sleeve 4 and the return spring 6 and the retaining spring 8 are arranged to be distributed in a card-connected installation manner, the differential 1, the half-bridge housing 2, the half-shaft 5, the support bearing 7, the piston sleeve 3, the meshing sleeve 4 and the return spring 6 and the sealing ring 9 are arranged to be distributed in a sealed installation manner, and the center line of the differential 1, the center line of the half-bridge housing 2, the center line of the piston sleeve 3, The center lines of the meshing sleeve 4, the half shaft 5, the return spring 6, the support bearing 7, the retaining spring 8 and the sealing ring 9 are arranged on the same straight line, two retaining springs 8 are arranged between the support bearing 7 and the differential 1 and the half-bridge housing 2, two sealing rings 9 are arranged between the piston sleeve 3 and the half-bridge housing 2, the spline groove body II42 is arranged to be connected with the spline groove body I15, the accommodating hole body II22 and the ramp body 32 are arranged to form an oil cavity, and the inner end port portion of the oil channel hole body 21 is arranged to be distributed corresponding to the oil cavity located between the accommodating hole body II22 and the ramp body 32.

[0066] The method of using this embodiment is as follows: when the vehicle is in normal driving state, the half-bridge housing 2 rotates on the support bearing 7, and the half-shaft 5 drives the driving wheel to rotate. When the vehicle is driving on a muddy and bad road condition, when one of the driving wheels is in a slipping state, the high-pressure liquid is injected into the oil cavity between the piston sleeve 3 and the inner wall of the receiving hole body II 22 through the oil channel hole body 21, overcoming the elastic energy storage of the return spring 6, pushing the piston sleeve 3 to move in the receiving hole body II 22, driving the meshing sleeve 4 to move toward the shell part I 11, so that the spline groove body II 42 and the spline groove body I 15 are in a matching connection state, so that the meshing sleeve 4 and the shell part I 11 are in a connected state, and the half-shaft 5 and the differential 1 are in a connected state, and the differential The differential 1 redistributes the torque of the half shaft 5, increasing the torque of the other driving wheel to meet the driving condition of the vehicle on the muddy and bad road conditions. After the vehicle passes through the muddy and bad road conditions, the high-pressure liquid is discharged from the peripheral side surface of the piston sleeve 3 and the inner wall of the accommodating hole body II22 through the oil channel hole body 21. Under the elastic energy storage action of the return spring 6, the piston sleeve 3 is pushed to move in the opposite direction in the accommodating hole body II22, driving the meshing sleeve 4 to move away from the shell part I11, so that the spline groove body II42 and the spline groove body I15 are in a disconnected connection state, the meshing sleeve 4 and the shell part I11 are in a disconnected state, and the half shaft 5 and the differential 1 are in a disconnected state, so that the vehicle is in a normal driving state.

[0067] When verifying the utility model, the inventor abandoned the existing technical features that all use friction between components as a locking force, and first proposed a technical feature of using a high-pressure liquid driving process as a switch for the drive mode of the drive wheel, and obtained the first unexpected technical effect: the external force is used as a switching force, and the connection strength between the meshing sleeve 4 and the differential 1 is increased, and the second unexpected technical effect is obtained: the high-pressure liquid is used as a switching force, and the smoothness of the switching process is improved, and the third unexpected technical effect is obtained: hydraulic matching with the vehicle's hydraulic device is achieved, and the reliability of the vehicle's performance is improved, and the fourth unexpected technical effect is achieved: the lateral buffer is set between the differential 1 and the half-bridge housing 2, and the working stability of the differential 1 and the half-bridge housing 2 is improved.

[0068] In the second embodiment of the utility model, the hydraulic differential lock device body, the piston sleeve 3, the engagement sleeve 4 and the return spring 6 are connected to each other in a manner that the high-pressure liquid driving process is used as a way to switch the driving mode of the driving wheel.

[0069] In this embodiment, the piston sleeve 3, the engagement sleeve 4 and the return spring 6 are connected to the hydraulic differential lock device body in such a way that the high-pressure liquid switches the connection state between the differential 1 and the half shaft 5 in the hydraulic differential lock device body.

[0070] In this embodiment, the hydraulic differential lock device body is configured to further include a support bearing 7.

[0071] In this embodiment, a first accessory device is further included and is arranged in the hydraulic differential lock device body. The first accessory device is arranged as a retaining spring 8 .

[0072] In this embodiment, a second accessory device is further included and is arranged between the piston sleeve 3 and the hydraulic differential lock device body. The second accessory device is arranged as a sealing ring 9 .

[0073] The second embodiment of the present utility model is based on the first embodiment.

[0074] The utility model has the following characteristics:

[0075] 1. Due to the design of the hydraulic differential lock device body, the piston sleeve 3, the engagement sleeve 4 and the return spring 6, the driving wheel is driven to rotate through the hydraulic differential lock device body, and the high-pressure liquid is used to switch the connection state between the differential 1 and the half shaft 5 in the hydraulic differential lock device body through the piston sleeve 3, the engagement sleeve 4 and the return spring 6, so that the high-pressure liquid driving process is used as the driving mode of the driving wheel to switch, which solves the technical problem that the friction between the components is used as the locking force, and thus the use of high-pressure liquid as the locking force is realized.

[0076] 2. Due to the design of the differential 1, the half-bridge housing 2, the half-shaft 5 and the support bearing 7, the half-bridge housing 2 and the half-shaft 5 are rotationally connected to the differential 1.

[0077] 3. Due to the design of the retaining spring 8, the installation of the support bearing 7 between the differential 1 and the half-bridge housing 2 is achieved.

[0078] 4. Due to the design of the sealing ring 9, the sealing process between the piston sleeve 3 and the half bridge housing 2 is achieved.

[0079] 5. Since the design limits the numerical range of the structural shape, the numerical range is the technical feature in the technical solution of the utility model, and is not a technical feature calculated by formula or obtained through a limited number of tests. Tests have shown that the technical features of this numerical range have achieved good technical effects.

[0080] 6. Due to the design of the technical features of the utility model, the effects of the individual and combined technical features have been shown through experiments to have various performance indicators of the utility model that are at least 1.7 times the existing performance indicators, and the evaluation shows that the utility model has a good market value.

[0081] There are other technical features connected with the hydraulic differential lock device body, piston sleeve 3, engagement sleeve 4 and return spring 6 which use high-pressure liquid driving process as the driving mode for switching the driving wheel, which are all embodiments of the present utility model, and the technical features of the above-mentioned embodiments can be combined arbitrarily. In order to meet the requirements of the Patent Law, Patent Implementation Rules and Examination Guidelines, all possible combinations of the technical features in the above-mentioned embodiments will no longer be described.

[0082] Therefore, in the technical field of hydraulic differential lock devices for drive axles, all technical contents including a hydraulic differential lock device body having a differential 1, a half-bridge housing 2 and a half-shaft 5, a piston sleeve 3 arranged in the half-bridge housing 2, an engaging sleeve 4 arranged between the piston sleeve 3 and the differential 1 and the half-shaft 5, and a return spring 6 arranged between the engaging sleeve 4 and the differential 1 are within the protection scope of the present utility model.

Claims

1. A hydraulic differential lock device for a drive axle, characterized by: It includes a hydraulic differential lock device body having a differential (1), a half axle housing (2), and a half shaft (5), a piston sleeve (3) disposed in the half axle housing (2), an engaging sleeve (4) disposed between the piston sleeve (3), the differential (1), and the half shaft (5), and a return spring (6) disposed between the engaging sleeve (4) and the differential (1).

2. The hydraulic differential lock device for a drive axle according to claim 1, characterized in that: The hydraulic differential lock device body, the piston sleeve (3), the engaging sleeve (4), and the return spring (6) are interconnected in such a way that the driving process by high-pressure liquid is used as a way to switch the driving mode of the driving wheels.

3. The hydraulic differential lock device for a drive axle according to claim 2, characterized in that: The piston sleeve (3), the engaging sleeve (4), and the return spring (6) are connected to the hydraulic differential lock device body in such a way that the high-pressure liquid switches the connection state between the differential (1) and the half shaft (5) in the hydraulic differential lock device body.

4. The hydraulic differential lock device for a drive axle according to claim 1, characterized in that: The hydraulic differential lock device body is further provided with a support bearing (7). Or, it further includes a first accessory device and the first accessory device is disposed in the hydraulic differential lock device body. The first accessory device is a snap ring (8). Or, it further includes a second accessory device and the second accessory device is disposed between the piston sleeve (3) and the hydraulic differential lock device body. The second accessory device is a sealing ring (9).

5. The hydraulic differential lock device for a drive axle according to claim 4, characterized in that: The differential (1) and the half axle housing (2) are respectively disposed on the support bearing (7). Snap rings (8) are respectively disposed between the support bearing (7), the differential (1), and the half axle housing (2). The piston sleeve (3) is disposed on the half axle housing (2). A sealing ring (9) is disposed between the piston sleeve (3) and the half axle housing (2). The engaging sleeve (4) is disposed between the piston sleeve (3) and the differential (1). The return spring (6) is disposed between the engaging sleeve (4) and the differential (1). The half shaft (5) is disposed on the engaging sleeve (4).

6. The hydraulic differential lock device for a drive axle according to claim 5, characterized in that: The piston sleeve (3) is a convex-shaped disc body having a receiving hole body III (31), and an inclined surface body (32) is disposed on the inner edge of the extended portion of the piston sleeve (3). The piston sleeve (3) is disposed in a through connection with the half axle housing (2). The peripheral side surface of the extended portion of the piston sleeve (3) and the peripheral side surface of the contracted portion of the piston sleeve (3) are respectively disposed in a receiving connection with the sealing ring (9). The receiving hole body III (31) is disposed in a connection with the engaging sleeve (4). The receiving hole body III (31) is a convex-shaped hole body, and the inclined surface body (32) is an annular inclined surface body.

7. The hydraulic differential lock device for a drive axle according to claim 5, characterized in that: The engaging sleeve (4) is a convex-shaped disc body having a receiving hole body IV (41), and a spline groove body II (42) is disposed on the inner wall of the extended portion of the engaging sleeve (4). The engaging sleeve (4) is disposed in a through connection with the piston sleeve (3). The contracted portion of the receiving hole body IV (41) is disposed in a connection with the half shaft (5). The extended portion of the receiving hole body IV (41) is disposed in a connection with the return spring (6). The stepped body of the receiving hole body IV (41) is disposed in a contact connection with the return spring (6). The spline groove body II (42) is disposed in a meshing connection with the differential (1). The receiving hole body IV (41) is a convex-shaped hole body. The spline groove body II (42) is a C-shaped spline groove.

8. The hydraulic differential lock device for a drive axle according to claim 5, characterized in that: The return spring (6) is set as a column spring and is set to be sleeved and connected with the half shaft (5). One end of the return spring (6) is set to be in contact connection with the differential (1), and the other end of the return spring (6) is set to be in contact connection with the engaging sleeve (4).

9. The hydraulic differential lock device for a drive axle according to claim 5, characterized in that: The differential (1) is set as a differential body having a housing part I (11), a housing part II (12) and connecting bolts (13). The ends of the connecting bolts (13) are respectively set to be in threaded connection with the housing part I (11) and the housing part II (12). The flange body of the connecting bolt (13) is set to be in contact connection with the outer end face edge part of the housing part I (11), and the inner end face part of the housing part I (11) is set to be in contact connection with the inner end face part of the housing part II (12). A spline groove body I (15) is provided on the peripheral side face of the end of the transverse part (14) of the housing part I (11), and a receiving hole body I (16) is provided on the outer end face of the transverse part (14). The transverse part (14) is set to be penetrated and connected with the support bearing (7) and a snap ring (8) located on the outer end face of the support bearing (7). The spline groove body I (15) is set to be in meshing connection with the engaging sleeve (4). The receiving hole body I (16) is respectively set to be connected with the half shaft (5) and the return spring (6). The housing part I (11) and the housing part II (12) are respectively set as convex-shaped cylindrical bodies. The connecting bolt (13) is set as a hexagonal bolt, and the transverse part (14) is set as a circular cylindrical body. The spline groove body I (15) is set as a C-shaped spline groove, and the receiving hole body I (16) is set as a convex-shaped hole body. The extended body of the receiving hole body I (16) is set to be connected with the half shaft (5) and the return spring (6), and the stepped body of the receiving hole body I (16) is set to be in contact connection with the return spring (6). Or, a receiving hole body II (22) is provided in the inner end face part of the half axle housing (2), and an oil passage hole body (21) is provided on the inner end of the half axle housing (2). The inside of the receiving hole body II (22) is set to be connected with the support bearing (7), and the outside of the receiving hole body II (22) is set to be connected with the piston sleeve (3). The inner end face part of the half axle housing (2) is set to be in contact connection with a snap ring (8) located on the outer end face of the support bearing (7). The inner side part of the peripheral inner wall of the receiving hole body II (22) is set to be in receiving connection with a snap ring (8) located on the inner end face of the support bearing (7). The outer side part of the peripheral inner wall of the receiving hole body II (22) is set to be in receiving connection with a sealing ring (9). The receiving hole body II (22) is set as a blind hole body having an intermediate flange ring part. The intermediate flange ring part of the receiving hole body II (22) is set to be in contact connection with the piston sleeve (3), and the oil passage hole body (21) is set as a hole body. The inner end port part of the oil passage hole body (21) is provided on the inner wall of the receiving hole body II (22), and the inner end port part of the oil passage hole body (21) is set to be distributed corresponding to the piston sleeve (3). Or, the support bearing (7) is configured as a thrust roller bearing and the inner ring portion of the support bearing (7) is configured to be sleeve-connected to the differential (1), the outer ring portion of the support bearing (7) is configured to be through-connected to the half-bridge housing (2), and the end surface portion of the support bearing (7) is configured to be contact-connected to the retaining spring (8), Or, the half shaft (5) is configured as a shaft-shaped body and the interior of the end of the half shaft (5) is configured to be connected to the engagement sleeve (4) in a through-type manner, and the end of the half shaft (5) is configured to be connected to the return spring (6) in a through-type manner, Or, the retaining spring (8) is arranged as a shaft retaining spring and the retaining spring (8) located on the outer end face portion of the support bearing (7) is arranged to be connected in a sleeve-type manner to the differential (1), the outer end face portion of the retaining spring (8) located on the outer end face portion of the support bearing (7) is arranged to be connected in a contacting manner to the differential (1), and the inner end face portion of the retaining spring (8) located on the outer end face portion of the support bearing (7) is arranged to be connected in a contacting manner to the support bearing (7), the retaining spring (8) located on the inner end face portion of the support bearing (7) is arranged to be embedded in the half-bridge housing (2), and the inner end face portion of the retaining spring (8) located on the inner end face portion of the support bearing (7) is arranged to be connected in a contacting manner to the support bearing (7), Alternatively, the sealing ring (9) is configured as an O-ring and the outer periphery of the sealing ring (9) is configured to be embeddedly connected to the half-bridge housing (2), and the inner periphery of the sealing ring (9) is configured to be contact-connected to the piston sleeve (3).

10. The hydraulic differential lock device for a drive axle according to any one of claims 1 to 9, characterized in that: The differential (1), the half-bridge housing (2), the half-shaft (5), the support bearing (7), the piston sleeve (3), the engagement sleeve (4), and the return spring (6) are arranged to be distributed in a piston drive docking manner, and the differential (1), the half-bridge housing (2), the half-shaft (5), the support bearing (7), the piston sleeve (3), the engagement sleeve (4), and the return spring (6) are arranged to be distributed in a clamping installation manner with the retaining spring (8), and the differential (1), the half-bridge housing (2), the half-shaft (5), the support bearing (7), the piston sleeve (3), the engagement sleeve (4), and the return spring (6) are arranged to be distributed in a sealing installation manner with the sealing ring (9), Alternatively, the center line of the differential (1), the center line of the half-bridge housing (2), the center line of the piston sleeve (3), the center line of the meshing sleeve (4), the center line of the half shaft (5), the center line of the return spring (6), the center line of the support bearing (7), the center line of the retaining spring (8) and the center line of the sealing ring (9) are arranged on the same straight line, two retaining springs (8) are arranged between the support bearing (7) and the differential (1) and the half-bridge housing (2), two sealing rings (9) are arranged between the piston sleeve (3) and the half-bridge housing (2), the spline groove body II (42) is arranged to be connected to the spline groove body I (15), the receiving hole body II (22) and the inclined surface body (32) are arranged to form an oil cavity, and the inner end port portion of the oil channel hole body (21) is arranged to be distributed corresponding to the oil cavity located between the receiving hole body II (22) and the inclined surface body (32).

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