Inter-wheel differential lock structure

Abstract

The utility model relates to an inter-wheel differential lock structure, which belongs to the technical field of differential locks and comprises a shell, a tapered roller bearing is fixedly mounted on the left side face of the shell, a differential shell is fixedly mounted on the left side face of the shell, and one end of the differential shell penetrates through the tapered roller bearing and extends into the shell. The tapered roller bearing is fixedly connected with the differential shell, a sliding assembly is arranged on the right side face of the shell and comprises a piston, a check ring for a hole, a deep groove ball bearing, a check ring for a shaft and a sliding sleeve, the piston is placed on the right side face of the shell, and the end, close to the shell, of the piston extends into the shell. According to the inter-wheel differential lock structure, under the action of the sliding assembly, when a vehicle falls into a slippery and muddy road surface, and wheels on one side slip or are immovable, rigid connection of the half shafts on the left side and the right side is achieved, driving torque is completely distributed to the wheels on the non-slip side, so that the vehicle gets out of trouble, the locking performance is improved, and the inter-wheel differential lock structure is more convenient and practical.

Description

Technical Field

[0001] The utility model relates to the technical field of differential locks, in particular to an inter-wheel differential lock structure. Background Art

[0002] The differential lock is a differential with automatic locking function. Its function is to improve the vehicle's ability to pass on bad roads. That is, when one of the vehicle's drive axles is idling, the differential can be quickly locked, making the two drive axles rigidly connected. Different differentials use different locking methods. The traditional ordinary bevel gear differential is the most commonly used differential device in wheeled vehicles.

[0003] The existing ordinary bevel gear differential has a low locking coefficient and the driving torque to the wheels on both sides is basically evenly distributed. Therefore, when the vehicle is driving on muddy or slippery roads, one wheel will slip, and the driving force will be reduced, and even the vehicle will lose its passability. For wheeled off-road vehicles that often operate in the field and have high locking reliability requirements, ordinary differentials can no longer meet their high passability requirements. Therefore, an inter-wheel differential lock structure is proposed to solve the above problem. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the utility model provides an inter-wheel differential lock structure, which has the advantage of improving the locking performance, solves the problem that the existing ordinary bevel gear differential has a low locking coefficient and the driving torque to the wheels on both sides is basically evenly distributed. Therefore, when the vehicle is driving on muddy or slippery roads, one side of the wheel will slip, the driving force will be reduced, and even the vehicle will lose its passability. For wheeled off-road vehicles that often operate in the field and have high requirements for locking reliability, ordinary differentials can no longer meet their high passability requirements.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an inter-wheel differential lock structure, comprising a housing, a tapered roller bearing fixedly mounted on the left side of the housing, a differential housing fixedly mounted on the left side of the housing, one end of which passes through the tapered roller bearing and extends into the interior of the housing, the tapered roller bearing and the differential housing fixedly connected.

[0006] A sliding assembly is provided on the right side of the shell, and the sliding assembly includes a piston, a hole retaining ring, a deep groove ball bearing, a shaft retaining ring and a sliding sleeve. The piston is placed on the right side of the shell, and one end close to the shell extends to the interior of the shell. The deep groove ball bearing is fixedly installed inside the piston. One end of the sliding sleeve is placed on the right side of the piston, and the other end thereof passes through the deep groove ball bearing and extends to the interior of the shell. The interior of the piston is fixedly connected to the hole retaining ring, and the outer peripheral wall of the sliding sleeve is fixedly connected to the shaft retaining ring.

[0007] The housing is provided with a limiting assembly for limiting the piston.

[0008] The housing is provided with a monitoring component for monitoring the sliding component.

[0009] Furthermore, both the sliding sleeve and the differential housing are provided with face teeth, and the tooth shape of the face teeth is not limited to rectangle and trapezoid, etc. A hydraulic oil port is provided on the housing.

[0010] Furthermore, the sliding sleeve is fixedly connected to the deep groove ball bearing, and the hole retaining ring and the shaft retaining ring are respectively fitted with the left side and the right side of the deep groove ball bearing.

[0011] Furthermore, the limit assembly includes a locking nut, which is fixedly installed inside the shell, and a limiting screw is fixedly installed on the right side of the locking nut. A first seal is fixedly connected between the piston and the shell, a pressure plate is fixedly installed on the right side of the shell, and a spring is fixedly connected to the inside of the shell. The spring and the piston are fixedly connected, and the right side of the sleeve is movably connected to a half-shaft with one end passing through the sleeve and extending to the inside of the differential shell, and a half-shaft gear is fixed on the outer peripheral wall of the half-shaft, a second seal is fixedly connected between the pressure plate and the shell, a third seal is fixedly connected between the pressure plate and the piston, and a bolt with one end passing through the pressure plate and extending to the inside of the shell is fixedly installed on the right side of the pressure plate.

[0012] Furthermore, the pressure plate and the piston are fitted together, and the limit screw and the spring are respectively located at the top and bottom of the locking nut.

[0013] Furthermore, the half shaft is engaged with the half shaft gear and the sliding sleeve through an external spline, and the third seal is located inside the second seal.

[0014] Furthermore, the monitoring component includes a sensor, which is fixedly mounted on the top surface of the shell, and the sensing end of the sensor extends to the interior of the shell. A push rod is placed on the bottom surface of the sensor, and a steel ball is placed on the bottom surface of the push rod. The steel ball fits the piston, and the top surface of the piston is provided with a conical surface, and the steel ball fits the conical surface.

[0015] Furthermore, a through hole is provided on the top surface of the shell, the push rod and the steel ball are both located inside the through hole, and the push rod and the through hole are clearance-fitted.

[0016] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0017] 1. The inter-wheel differential lock structure, through the action of the sliding component, creates a rigid connection between the left and right half-axles when the vehicle is stuck in a wet or muddy road and one wheel slips or becomes stuck. The drive torque is fully distributed to the wheel on the non-slip side, enabling the vehicle to escape, improving locking performance and making it more convenient and practical.

[0018] 2. The inter-wheel differential lock structure monitors the position of the sliding sleeve through the action of the sensor, which is convenient for users to use. The piston is restricted by the action of the pressure plate to improve the stability of the piston. At the same time, the sealing of the housing is improved through the action of the first seal, the second seal and the third seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the sliding assembly in the present invention;

[0021] Figure 3 This is a schematic diagram of the installation of the sensor in the structure of this utility model.

[0022] In the figure: 1 differential case, 2 half-shaft gear, 3 tapered roller bearing, 4 locking nut, 5 limit screw, 6 housing, 7 first seal, 8 sliding assembly, 81 piston, 82 retaining ring for hole, 83 deep groove ball bearing, 84 retaining ring for shaft, 85 sleeve, 9 pressure plate, 10 second seal, 11 third seal, 12 half-shaft, 13 spring, 14 bolt, 15 sensor, 16 push rod, 17 steel ball. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Example 1: Please refer to Figures 1 to 3 In this embodiment, an inter-wheel differential lock structure includes a housing 6, a tapered roller bearing 3 is fixedly mounted on the left side of the housing 6, and a differential housing 1 is fixedly mounted on the left side of the housing 6, one end of which passes through the tapered roller bearing 3 and extends into the interior of the housing 6, and the tapered roller bearing 3 and the differential housing 1 are fixedly connected.

[0025] A sliding assembly 8 is provided on the right side of the housing 6, and the sliding assembly 8 includes a piston 81, a hole retaining ring 82, a deep groove ball bearing 83, a shaft retaining ring 84 and a sleeve 85. The piston 81 is placed on the right side of the housing 6, and one end close to the housing 6 extends to the interior of the housing 6. The deep groove ball bearing 83 is fixedly installed inside the piston 81. One end of the sleeve 85 is placed on the right side of the piston 81, and the other end thereof passes through the deep groove ball bearing 83 and extends to the interior of the housing 6. The interior of the piston 81 is fixedly connected to the hole retaining ring 82, and the outer peripheral wall of the sleeve 85 is fixedly connected to the shaft retaining ring 84.

[0026] Among them, both the sliding sleeve 85 and the differential housing 1 are provided with end face teeth, and the tooth shape of the end face teeth is not limited to rectangle and trapezoid, etc. A hydraulic oil port is opened on the housing 6, the sliding sleeve 85 and the deep groove ball bearing 83 are fixedly connected, and the hole retaining ring 82 and the shaft retaining ring 84 are respectively fitted with the left side and the right side of the deep groove ball bearing 83.

[0027] Specifically, when the hydraulic oil port is opened, the hydraulic oil enters from the hydraulic oil port 6 on the housing, pushing the sliding assembly 8 to move to the left, the end face teeth of the sliding sleeve 85 engage with the end face teeth of the differential housing 1, the sliding sleeve 85 engages with the external spline of the half-shaft 12 through the internal spline, and the half-shaft 12 engages with the internal spline of the half-shaft gear 2 through the external spline. The half-shaft gear 2, the half-shaft 12, the sliding sleeve 85 and the differential housing 1 rotate together, the differential lock works, and the differential is locked.

[0028] Example 2: Please refer to Figures 1 to 3 In this embodiment, on the basis of embodiment 1, a limit assembly is provided on the housing 6, and the limit assembly includes a locking nut 4, which is fixedly installed inside the housing 6, and a limit screw 5 is fixedly installed on the right side of the locking nut 4. A first seal 7 is fixedly connected between the piston 81 and the housing 6, a pressure plate 9 is fixedly installed on the right side of the housing 6, a spring 13 is fixedly connected to the inside of the housing 6, and the spring 13 is fixedly connected to the piston 81. The right side of the sliding sleeve 85 is movably connected to the half-shaft 12 with one end passing through the sliding sleeve 85 and extending to the inside of the differential housing 1, and the outer peripheral wall of the half-shaft 12 is fixed with the half-shaft gear 2, a second seal 10 is fixedly connected between the pressure plate 9 and the housing 6, a third seal 11 is fixedly connected between the pressure plate 9 and the piston 81, and a bolt 14 with one end passing through the pressure plate 9 and extending to the inside of the housing 6 is fixedly installed on the right side of the pressure plate 9.

[0029] Among them, the pressure plate 9 and the piston 81 are fitted together, the limit screw 5 and the spring 13 are respectively located at the top and bottom of the locking nut 4, the half shaft 12 is meshed with the half shaft gear 2 and the sleeve 85 through the external spline, and the third seal 11 is located inside the second seal 10.

[0030] Specifically, when the hydraulic oil port is cut off, the spring 13 pushes the sliding assembly 8 to move to the right, and the end face teeth of the sliding sleeve 85 are separated from the end face teeth of the differential case 1. At this time, the half-shaft gear 2, the half-shaft 12 and the sliding sleeve 85 rotate together, and the differential case 1 does not rotate together. The differential lock function is released, and the differential is differential.

[0031] Example 3: Please refer to Figures 1 to 3 In this embodiment, based on the first and second embodiments, a monitoring component is provided on the shell 6, and the monitoring component includes a sensor 15. The sensor 15 is fixedly mounted on the top surface of the shell 6. The sensing end of the sensor 15 extends to the interior of the shell 6. A push rod 16 is placed on the bottom surface of the sensor 15. A steel ball 17 is placed on the bottom surface of the push rod 16. The steel ball 17 fits the piston 81. The top surface of the piston 81 is provided with a conical surface, and the steel ball 17 fits the conical surface.

[0032] A through hole is provided on the top surface of the housing 6 , and both the push rod 16 and the steel ball 17 are located inside the through hole, with the push rod 16 and the through hole being in clearance fit.

[0033] It should be noted that the sensor 15 is a conventional device known to the public in the prior art, and its specific structure and working principle will not be described in detail herein.

[0034] Specifically, the piston 81 pushes the steel ball 17 to the highest position, the steel ball 17 pushes the push rod 16 to the highest position, the push rod 16 lifts the sensor 15, the sensor 15 is turned on, and the position of the sliding sleeve 85 is monitored under the action of the sensor 15.

[0035] The working principle of the above embodiment is:

[0036] When the hydraulic oil port is connected to the oil, the hydraulic oil enters from the hydraulic oil port 6 on the housing, pushing the sliding assembly 8 to move to the left. The end face teeth of the sliding sleeve 85 mesh with the end face teeth of the differential housing 1. The sliding sleeve 85 meshes with the external splines of the half shaft 12 through the internal spline. The half shaft 12 meshes with the internal spline of the half shaft gear 2 through the external spline. The half shaft gear 2, the half shaft 12, the sliding sleeve 85 and the differential housing 1 rotate together, the differential lock works, and the differential is locked. When the hydraulic oil port is cut off, the spring 13 pushes the sliding assembly Component 8 moves to the right, and the end face teeth of the sliding sleeve 85 are separated from the end face teeth of the differential case 1. At this time, the side gear 2, the side shaft 12 and the sliding sleeve 85 rotate together, and the differential case 1 does not rotate together. The differential lock function is released, the differential is differential, the piston 81 pushes the steel ball 17 to the highest position, the steel ball 17 pushes the push rod 16 to the highest position, the push rod 16 lifts the sensor 15, and the sensor 15 is turned on. Under the action of the sensor 15, the position of the sliding sleeve 85 is monitored.

[0037] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0038] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An inter-wheel differential lock structure, comprising a housing (6), characterized in that: A tapered roller bearing (3) is fixedly mounted on the left side of the housing (6), and a differential housing (1) is fixedly mounted on the left side of the housing (6), one end of which passes through the tapered roller bearing (3) and extends into the interior of the housing (6), and the tapered roller bearing (3) and the differential housing (1) are fixedly connected; A sliding assembly (8) is provided on the right side of the housing (6), and the sliding assembly (8) includes a piston (81), a hole retaining ring (82), a deep groove ball bearing (83), a shaft retaining ring (84) and a sliding sleeve (85). The piston (81) is placed on the right side of the housing (6), and one end close to the housing (6) extends to the interior of the housing (6). The deep groove ball bearing (83) is fixedly installed inside the piston (81). One end of the sliding sleeve (85) is placed on the right side of the piston (81), and the other end thereof passes through the deep groove ball bearing (83) and extends to the interior of the housing (6). The interior of the piston (81) is fixedly connected to the hole retaining ring (82), and the outer peripheral wall of the sliding sleeve (85) is fixedly connected to the shaft retaining ring (84); The housing (6) is provided with a limiting component, and the housing (6) is provided with a monitoring component.

2. The inter-wheel differential lock structure according to claim 1, characterized in that: The sliding sleeve (85) and the differential housing (1) are both provided with end face teeth, and the tooth shape of the end face teeth is not limited to rectangle and trapezoid, etc. A hydraulic oil port is provided on the housing (6).

3. The inter-wheel differential lock structure according to claim 2, characterized in that: The sliding sleeve (85) and the deep groove ball bearing (83) are fixedly connected, and the hole retaining ring (82) and the shaft retaining ring (84) are respectively fitted with the left side and the right side of the deep groove ball bearing (83).

4. The inter-wheel differential lock structure according to claim 1, characterized in that: The limiting assembly includes a locking nut (4), the locking nut (4) is fixedly mounted inside the housing (6), a limiting screw (5) is fixedly mounted on the right side of the locking nut (4), a first sealing member (7) is fixedly connected between the piston (81) and the housing (6), a pressure plate (9) is fixedly mounted on the right side of the housing (6), a spring (13) is fixedly connected inside the housing (6), the spring (13) and the piston (81) are fixedly connected, and the sleeve (85) is fixedly mounted on the right side of the housing (6). The right side is movably connected to a half shaft (12) having one end penetrating the sliding sleeve (85) and extending to the inside of the differential housing (1); the outer peripheral wall of the half shaft (12) is fixed with a half shaft gear (2); a second sealing member (10) is fixedly connected between the pressure plate (9) and the housing (6); a third sealing member (11) is fixedly connected between the pressure plate (9) and the piston (81); and a bolt (14) having one end penetrating the pressure plate (9) and extending to the inside of the housing (6) is fixedly installed on the right side of the pressure plate (9).

5. The inter-wheel differential lock structure according to claim 4, characterized in that: The pressure plate (9) and the piston (81) are fitted together, and the limit screw (5) and the spring (13) are respectively located at the top and bottom of the locking nut (4).

6. The inter-wheel differential lock structure according to claim 5, characterized in that: The half shaft (12) is engaged with the half shaft gear (2) and the sliding sleeve (85) via an external spline, and the third sealing member (11) is located inside the second sealing member (10).

7. The inter-wheel differential lock structure according to claim 4, characterized in that: The monitoring component comprises a sensor (15), wherein the sensor (15) is fixedly mounted on the top surface of the housing (6), wherein the sensing end of the sensor (15) extends to the interior of the housing (6), wherein a push rod (16) is placed on the bottom surface of the sensor (15), wherein a steel ball (17) is placed on the bottom surface of the push rod (16), wherein the steel ball (17) is fitted with a piston (81), wherein a conical surface is formed on the top surface of the piston (81), and wherein the steel ball (17) is fitted with the conical surface.

8. The inter-wheel differential lock structure according to claim 7, characterized in that: A through hole is provided on the top surface of the shell (6), the push rod (16) and the steel ball (17) are both located inside the through hole, and the push rod (16) and the through hole are clearance-matched.

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