Drive axle power disconnection reversing device

Abstract

The utility model belongs to the technical field of drive axle power disconnection, and particularly relates to a drive axle power disconnection reversing device. The device comprises a spline shaft, a connecting sleeve is arranged in the middle of the spline shaft, the connecting sleeve and the spline shaft synchronously rotate, a left bevel gear and a right bevel gear are arranged at the two ends of the spline shaft, and the connecting sleeve is located between the left bevel gear and the right bevel gear, can move along the spline shaft and can be embedded with the left bevel gear and the right bevel gear respectively. A bevel gear is meshed between the left bevel gear and the right bevel gear, when the connecting sleeve is located between the left bevel gear and the right bevel gear, the bevel gear drives the left bevel gear and the right bevel gear to idle, and when the connecting sleeve and the left bevel gear are embedded, the left bevel gear drives the spline shaft to rotate in the forward direction through the connecting sleeve. The right bevel gear drives the spline shaft to rotate reversely through the connecting sleeve. By means of the device, the drive axle has the functions of power disconnection and steering switching, and the escape capacity is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of drive axle power disconnection, in particular to a drive axle power disconnection reversing device. Background Art

[0002] Currently, freight vehicles only have partially driven axles, and they often have to climb hills with heavy loads. Special and heavy-duty transport vehicles, in particular, often have tires that slip and cannot climb hills, requiring assisted traction from rescue vehicles. However, when rescue vehicles are towing and rescuing, it is time-consuming, labor-intensive, and costly, and there is also a risk of damage to the vehicle and rollover. In addition to the solution of assisted traction with a traction rescue vehicle, the number of drive axles of the vehicle can also be increased so that the vehicle can smoothly climb hills on its own. However, existing drive axle products generally do not have a power disconnect device. When auxiliary driving force is not needed, such as when coasting downhill or towing at high speed, the rotation of the tires will cause the transmission devices such as gears and the engine to rotate at high speed, generating greater resistance and high temperature of the gearbox. In the existing technology, most axles do not have a power disconnect function and are not suitable for multi-axle equipment on vehicles. If they are forcibly increased, energy consumption and sliding resistance will increase.

[0003] Although a few drive axles currently have power disconnect devices with sliding sleeves on the wheel side or input shaft, such devices do not have a reversing function and require an additional matching gearbox to achieve forward or reverse gear. Utility Model Content

[0004] The utility model provides a drive axle power disconnection and reversing device, which can realize power disconnection and tire reversal, thereby improving the vehicle's ability to escape from difficulties and solving the above problems.

[0005] The technical solution of the present utility model is achieved as follows:

[0006] A drive axle power disconnect and reversing device includes a spline shaft, a connecting sleeve is installed in the middle of the spline shaft, the connecting sleeve rotates synchronously with the spline shaft, the spline shaft is equipped with a freely rotatable left bevel gear and a right bevel gear, the connecting sleeve is located between the left bevel gear and the right bevel gear, the connecting sleeve can move along the spline shaft and can be engaged with the left bevel gear and the right bevel gear respectively, and a bevel gear is meshed between the left bevel gear and the right bevel gear.

[0007] The engine drives the bevel gear to rotate, and the bevel gear drives the left and right bevel gears to rotate. The connecting sleeve realizes the transmission, disconnection, and rotation reversal of power to the spline shaft. When the connecting sleeve is located between the left and right bevel gears, the bevel gear drives the left and right bevel gears to rotate idly. When the connecting sleeve is engaged with the left bevel gear, the left bevel gear drives the spline shaft to rotate forward through the connecting sleeve. When the connecting sleeve is engaged with the right bevel gear, the right bevel gear drives the spline shaft to rotate reversely through the connecting sleeve, thereby driving the forward and reverse rotation of the wheel end.

[0008] Optionally, it further includes an actuator cylinder, which is a piston-cylinder structure. The piston part of the actuator cylinder is connected to a shift fork, the lower end of the shift fork is buckled in the middle groove of the connecting sleeve, and the shift fork drives the connecting sleeve to move axially along the spline shaft.

[0009] Optionally, an engine is further included, wherein the output end of the engine is connected to the bevel gear, and the engine drives the bevel gear to rotate.

[0010] Optionally, the actuator cylinder is fixedly mounted on the main reducer housing.

[0011] Optionally, the engine is fixedly mounted on the main reducer housing.

[0012] Optionally, teeth are provided on the small end faces of the left bevel gear and the right bevel gear, and the left bevel gear and the right bevel gear are engaged with the connecting sleeve through the teeth.

[0013] Optionally, both left and right ends of the spline shaft are connected to wheel end assemblies through splines, and the two wheel end assemblies are fixed at both ends of the bridge housing. A wheel-side reducer is provided inside the wheel end assembly for installing tires and outputting power.

[0014] After adopting the above technical solution, the beneficial effects of the utility model are:

[0015] The power disconnect and reversing device of this utility model utilizes the left and right movement of the connecting sleeve to enable the axle to assist power transmission, power reversal, and power disconnect. Power reversal enables forward or reverse drive of the axle, enhancing the vehicle's ability to escape from obstacles. When the connecting sleeve is in the middle position, it functions as a neutral transmission disconnect, enabling low-resistance gliding. Furthermore, the power disconnect and reversing device is centralized within the final reducer housing, resulting in a compact structure. This allows for the manufacture of smaller wheelbases, enabling the installation of a greater number of axles, while also increasing space for integrated axle steering. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1 is a cross-sectional view of the entire device in the embodiment;

[0018] Figure 2 The whole device in the embodiment is a three-dimensional Figure I ;

[0019] Figure 3 The whole device in the embodiment is a three-dimensional Figure II .

[0020] Explanation of the accompanying symbols: 1. Spline shaft; 2. Connecting sleeve; 3. Left bevel gear; 4. Right bevel gear; 5. Bevel gear; 6. Actuator cylinder; 7. Shift fork; 8. Engine; 9. Wheel end assembly; 10. Wheel-side reducer. DETAILED DESCRIPTION

[0021] 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.

[0022] The embodiment of the present application discloses a drive axle power disconnection and reversing device.

[0023] Example

[0024] according to Figure 1-Figure 3 As shown, a drive axle power disconnect reversing device includes an engine 8, a bevel gear 5, a left bevel gear 3, a right bevel gear 4, a spline shaft 1, a connecting sleeve 2 and an actuator cylinder 6.

[0025] The left and right ends of the spline shaft 1 are connected to wheel end assemblies 9 via splines. The two wheel end assemblies 9 are fixed to the ends of the axle housing for mounting tires and outputting power. The wheel end assemblies 9 may be provided with wheel-side reducers 10. The wheel end assemblies 9 and wheel-side reducers 10 are related to the existing technology, and the specific structure and implementation principle are not detailed here.

[0026] The connecting sleeve 2 is sleeved on the center of the spline shaft 1 through a spline fitting, and the connecting sleeve 2 rotates synchronously with the spline shaft 1. The connecting sleeve 2 can slide left and right on the spline shaft 1. The left bevel gear 3 and the right bevel gear 4 are sleeved on the spline shaft 1. The left bevel gear 3 and the right bevel gear 4 can slide and rotate freely on the spline shaft 1. The connecting sleeve 2 is located between the left bevel gear 3 and the right bevel gear 4. Teeth are provided on the small end faces of the left bevel gear 3 and the right bevel gear 4. The left bevel gear 3 and the right bevel gear 4 are engaged with the connecting sleeve 2 through the teeth.

[0027] The actuator cylinder 6 is a piston-cylinder structure. The actuator cylinder 6 is fixedly mounted on the main reducer housing. The left and right sides of the actuator cylinder 6 are connected to oil pressure or air pressure to control the conversion of the left, middle and right positions. The piston of the actuator cylinder 6 is connected to a shift fork 7. The lower end of the shift fork 7 is buckled in the middle groove of the connecting sleeve 2. The actuator cylinder 6 controls the movement of the piston through oil pressure or air pressure, so that the piston drives the connecting sleeve 2 to move left and right along the spline shaft 1 through the shift fork 7. During the left and right movement of the connecting sleeve 2, the connecting sleeve 2 can respectively realize the interlocking connection between the connecting sleeve 2 and the left bevel gear 3, the connecting sleeve 2 is located between the left bevel gear 3 and the right bevel gear 4 and is not interlocked with the two, and the connecting sleeve 2 is interlocked with the right bevel gear 4. The actuator cylinder 6 is a prior art, and the specific structure and operating principle will not be described in detail here.

[0028] The engine 8 is fixedly mounted on the main reducer housing. The output end of the engine 8 is connected to the bevel gear 5. The left and right ends of the bevel gear 5 are respectively engaged with the left bevel gear 3 and the right bevel gear 4. The engine 8 drives the bevel gear 5 to rotate, and the bevel gear 5 drives the left bevel gear 3 and the right bevel gear 4 to rotate.

[0029] Working principle:

[0030] The actuator cylinder 6 drives the connecting sleeve 2 to move on the spline shaft 1 through the shift fork 7, and three states will appear.

[0031] The first state: the connecting sleeve 2 is located in the middle of the two spline shafts 1, and the connecting sleeve 2 is in a neutral state. In this state, the connecting sleeve 2 is not engaged with the left bevel gear 3, nor is it engaged with the right bevel gear 4. At this time, the engine 8 drives the bevel gear 5 to rotate, and the bevel gear 5 drives the left bevel gear 3 and the right bevel gear 4 to idle in opposite directions along the spline shaft 1 at the same time, thereby realizing the power disconnection function.

[0032] The second state: the connecting sleeve 2 slides to the left along the spline shaft 1 and engages with the left bevel gear 3. At this time, the engine 8 drives the bevel gear 5 to rotate, and the bevel gear 5 drives the left bevel gear 3 and the right bevel gear 4 to rotate synchronously in opposite directions. Since the connecting sleeve 2 is engaged with the left bevel gear 3 at this time, the left bevel gear 3 drives the connecting sleeve 2 to rotate while rotating, and the connecting sleeve 2 drives the spline shaft 1 to rotate synchronously. During the rotation process, the spline shaft 1 drives the tire at the wheel end assembly 9 to rotate synchronously in the forward direction.

[0033] The third state: the connecting sleeve 2 slides to the right along the spline shaft 1 and engages with the right bevel gear 4. At this time, the engine 8 drives the bevel gear 5 to rotate, and the bevel gear 5 drives the left bevel gear 3 and the right bevel gear 4 to rotate synchronously in opposite directions. Since the connecting sleeve 2 is engaged with the right bevel gear 4 at this time, the right bevel gear 4 drives the connecting sleeve 2 to rotate while rotating, and the connecting sleeve 2 drives the spline shaft 1 to rotate synchronously. During the rotation process, the spline shaft 1 drives the tire at the wheel end assembly 9 to rotate synchronously in the opposite direction.

[0034] By changing the three moving states of the connecting sleeve 2, the power disconnection, forward output and reverse output of the engine 8 are achieved.

[0035] Freight vehicles currently have only partial axle drive, often encountering heavily loaded hill climbs. This is especially true for specialized and heavy-duty transport vehicles, which often experience tire slippage and become unable to climb, necessitating the need for a rescue vehicle. In these situations, the remaining axles can be replaced with the drive axle power disconnect and reversing device of the present invention. When climbing a hill becomes difficult, the power of the drive axle power disconnect and reversing device can be engaged to provide auxiliary drive. This auxiliary drive can be configured for low speed and high torque, enabling rescue efforts and saving time, equipment, and costs while waiting for rescue. On normal, level roads, the power can be disconnected, with only the original partial drive axle used for driving.

[0036] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the technical solution of the present invention should be included in the scope of protection of the present invention.

Claims

1. A drive axle power disconnect reversing device, characterized by: It includes a spline shaft, a connecting sleeve is installed in the middle of the spline shaft, the connecting sleeve rotates synchronously with the spline shaft, and the two ends of the spline shaft are provided with a freely rotatable left bevel gear and a right bevel gear. The connecting sleeve is located between the left bevel gear and the right bevel gear. The connecting sleeve can move along the spline shaft and can be engaged with the left bevel gear and the right bevel gear respectively. A bevel gear is meshed between the left bevel gear and the right bevel gear. When the connecting sleeve is located between the left bevel gear and the right bevel gear, the bevel gear drives the left bevel gear and the right bevel gear to rotate idly. When the connecting sleeve is engaged with the left bevel gear, the left bevel gear drives the spline shaft to rotate forward through the connecting sleeve, thereby driving the wheel end to rotate. When the connecting sleeve is engaged with the right bevel gear, the right bevel gear drives the spline shaft to rotate reversely through the connecting sleeve, thereby driving the wheel end to rotate.

2. The drive axle power disconnect reversing device according to claim 1, characterized in that: It also includes an actuator cylinder, which is a piston-cylinder structure. The piston part of the actuator cylinder is connected to a shift fork. The lower end of the shift fork is buckled in the middle groove of the connecting sleeve. The shift fork drives the connecting sleeve to move axially left and right along the spline shaft.

3. The drive axle power disconnect reversing device according to claim 1, characterized in that: It also includes an engine, the output end of the engine is connected to the bevel gear, and the engine drives the bevel gear to rotate.

4. The drive axle power disconnect reversing device according to claim 2, characterized in that: The actuator cylinder is fixedly mounted on the main reducer housing.

5. The drive axle power disconnection reversing device according to claim 3, characterized in that: The engine is fixedly mounted on the main reducer housing.

6. The drive axle power disconnect reversing device according to claim 1, characterized in that: The small end faces of the left bevel gear and the right bevel gear are both provided with teeth, and the left bevel gear and the right bevel gear are engaged with the connecting sleeve through the teeth.

7. The drive axle power disconnect reversing device according to claim 1, characterized in that: The left and right ends of the spline shaft are connected to wheel end assemblies through splines. The two wheel end assemblies are fixed to the two ends of the bridge housing. A wheel-side reducer is provided inside the wheel end assembly for installing tires and outputting power.

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