Small stamping wheel edge rear axle device applicable to severe working conditions

Abstract

The utility model discloses a small stamping wheel edge rear axle device can apply to severe working condition, its characterized in that, including: rear axle housing, two supports, conveying assembly, heat exchanger, radiator, two brakes and two wheel edge reducers, conveying assembly includes: oil inlet pipe, oil outlet pipe, two aprons and oil pump, heat exchanger includes: sealed shell, two fixed plates, a plurality of heat dissipation oil pipes, water inlet pipe and water outlet pipe. The utility model aims at providing a small stamping wheel edge rear axle device can apply to severe working condition, can through heat exchange device and control rear axle oil temperature in 80-100 DEG C ideal range (conventional lubricating oil work upper limit is 120 DEG C), prevent lubricating oil because high temperature oxidation, viscosity drop or additive failure, avoid because thermal expansion leads to too big or too small play, the even distribution of rolling body and raceway contact stress, the advantage of reduced failure rate.

Description

Technical Field

[0001] This utility model relates to the field of vehicle axle technology, specifically to a small stamped wheel-side rear axle device suitable for harsh working conditions. Background Technology

[0002] The stamped wheel-side rear axle is a car rear axle assembly that combines stamping technology with wheel-side reduction design. Its core lies in manufacturing a high-precision axle housing through stamping technology and integrating a wheel-side reducer to achieve efficient power transmission.

[0003] The existing rear axle lacks a heat exchange device. Under heavy load or continuous climbing, the heat generated by gear meshing and bearing friction can raise the oil temperature to over 120°C, causing the lubricating oil viscosity to drop by more than 50% and the oil film thickness to be insufficient. This leads to direct metal-to-metal contact wear. The stamped axle housing and wheel-side reducer housing undergo thermal expansion at high temperatures. If the thermal expansion coefficients of the materials are not matched (such as at the connection between steel and aluminum), it can cause the interface to loosen or crack, further aggravating oil leakage and wear. If the rear axle continues to operate under high load, the heat cannot be dissipated in time, which may lead to "thermal runaway". Utility Model Content

[0004] The purpose of this invention is to provide a small stamped wheel-side rear axle device suitable for harsh working conditions. It can control the rear axle oil temperature within the ideal range of 80-100℃ through a heat exchange device (the upper limit of conventional lubricating oil is 120℃), preventing the lubricating oil from oxidizing, decreasing in viscosity, or failing due to additives at high temperatures. It reduces the thermal expansion of the axle housing and wheel-side reducer housing through heat dissipation, avoiding interface loosening, seal hardening, or gear tooth deformation caused by thermal stress concentration. It maintains stable bearing preload in low-temperature environments, avoiding excessive or insufficient clearance due to thermal expansion. It also provides advantages such as uniform distribution of contact stress between rolling elements and raceways, and reduced failure rate, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a small stamped wheel-side rear axle device suitable for harsh working conditions, characterized in that it includes: a rear axle housing, two supports, a conveying assembly, a heat exchanger, a radiator, a differential, two half-shafts, two splined shafts, two brakes, and two wheel-side reducers. The conveying assembly includes: an oil inlet pipe, an oil outlet pipe, two cover plates, and an oil pump. The heat exchanger includes: a sealed outer shell, two fixing plates, multiple cooling oil pipes, a water inlet pipe, and a water outlet pipe. The sealed outer shell is fixedly installed on the inner wall of the rear axle housing. Both fixing plates are fixedly installed on the inner wall of the sealed outer shell. The multiple cooling oil pipes are evenly distributed inside the sealed outer shell and fixedly connected to the two fixing plates. One end of the water inlet pipe is fixedly installed on the outer wall of the sealed outer shell and fixedly connected to the outer wall of the rear axle housing. One end of the water outlet pipe is fixedly installed on the outer wall of the sealed outer shell and fixedly connected to the outer wall of the rear axle housing.

[0006] Furthermore, both brackets are welded to the outer wall of the rear axle housing. One end of the oil inlet pipe is fixedly installed on the oil outlet of the oil pump, and the other end of the oil inlet pipe is fixedly connected to a cover plate near the oil pump. The oil outlet pipe is fixedly installed on a cover plate away from the oil pump. The two cover plates are fixedly installed on the outer wall of the side where the oil inlet pipe and the oil outlet pipe are close to each other. The oil pump is fixedly installed on the inner wall of the rear axle housing.

[0007] Furthermore, the radiator is located on one side of the rear axle housing, and the outlet of the radiator is fixedly connected to one end of the inlet pipe, while the inlet of the radiator is fixedly connected to one end of the outlet pipe.

[0008] Furthermore, the differential is fixedly mounted on the rear axle housing with screws.

[0009] Furthermore, the two half-shafts are disposed within the rear axle housing, with the ends of the two half-shafts close to each other meshing with the gears of the differential.

[0010] Furthermore, the two splined shafts are fixedly mounted on one end of the rear axle housing by screws, and the two brakes are fixedly mounted on the splined shafts by screws.

[0011] Furthermore, the two wheel-side reducers are fixedly mounted on the brake and rotatably connected to the spline shaft, and the two wheel-side reducers are connected to the ends of the half-shaft that are far apart from each other.

[0012] In summary, due to the adoption of the above-mentioned technologies, the beneficial effects of this utility model are: This invention, by incorporating a conveying component, controls the flow of lubricating oil within a heat exchanger via an oil pump under low load conditions. This dissipates heat from the lubricating oil, preventing direct metal-to-metal wear caused by high-temperature oxidation, viscosity reduction, or additive failure, which would accelerate the aging of rear axle components. This invention utilizes a heat exchanger to accelerate the heat dissipation efficiency of the lubricating oil in the rear axle housing under high load and high temperature conditions, thereby slowing down the aging of the seals. Under low temperature conditions, the radiator increases the oil temperature of the lubricating oil in the rear axle housing, stabilizes the oil temperature, keeps the lubricating oil viscosity constant, and reduces the friction coefficient of gears and bearings. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural schematic diagram of a small stamped wheel-side rear axle device suitable for harsh working conditions according to this utility model. Figure 2 This is a partial front view sectional structural schematic diagram of the rear axle housing of this utility model; Figure 3 This is a schematic diagram of the assembly structure of the conveying component, heat exchanger, and water tank of this utility model; Figure 4 This is a three-dimensional structural diagram of the heat exchanger of this utility model; Figure 5 This is a three-dimensional structural diagram of the fixing plate of this utility model; Figure 6 This is a partial front view sectional structural schematic diagram of the heat exchanger of this utility model; Figure 7 This is a partial three-dimensional structural diagram of the rear axle housing of this utility model; Figure 8 This is a three-dimensional structural diagram of the differential of this utility model; Figure 9 This is a schematic diagram of the assembly structure of the splined shaft and the brake of this utility model; Figure 10 This is a schematic diagram of the assembly structure of the half-shaft and wheel-side reducer of this utility model.

[0014] In the diagram: 1. Rear axle housing; 2. Bracket; 3. Conveyor assembly; 301. Oil inlet pipe; 302. Oil outlet pipe; 303. Cover plate; 304. Oil pump; 4. Heat exchanger; 401. Sealing housing; 402. Fixing plate; 403. Cooling oil pipe; 404. Water inlet pipe; 405. Water outlet pipe; 5. Radiator; 6. Differential; 7. Half shaft; 8. Splined shaft; 9. Brake; 10. Wheel-side reducer. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0016] This utility model provides, for example Figure 1-10As shown, a small stamped wheel-side rear axle device suitable for harsh working conditions includes: a rear axle housing 1, two brackets 2, a conveying assembly 3, a heat exchanger 4, a radiator 5, a differential 6, two half-shafts 7, two splined shafts 8, two brakes 9, and two wheel-side reducers 10. The conveying assembly 3 includes: an oil inlet pipe 301, an oil outlet pipe 302, two cover plates 303, and an oil pump 304. The heat exchanger 4 includes: a sealed outer shell 401, two fixing plates 402, multiple cooling oil pipes 403, a water inlet pipe 404, and a water outlet pipe 405. The sealed outer shell 401 is fixedly installed on the rear axle housing 1. On the inner wall of the housing, two fixing plates 402 are fixedly installed on the inner wall of the sealing housing 401. Multiple cooling oil pipes 403 are evenly distributed inside the sealing housing 401 and fixedly connected to the two fixing plates 402. One end of the water inlet pipe 404 is fixedly installed on the outer wall of the sealing housing 401 and is fixedly connected to the outer wall of the rear axle housing 1. One end of the water outlet pipe 405 is fixedly installed on the outer wall of the sealing housing 401 and is fixedly connected to the outer wall of the rear axle housing 1. The fixing plates 402 are provided with openings at both the upper and lower ends for the flow of cooling water.

[0017] Furthermore, both brackets 2 are welded to the outer wall of the rear axle housing 1. One end of the oil inlet pipe 301 is fixedly installed on the oil outlet of the oil pump 304, and the other end of the oil inlet pipe 301 is fixedly connected to the cover plate 303 near the oil pump 304. The oil outlet pipe 302 is fixedly installed on the cover plate 303 away from the oil pump 304. The two cover plates 303 are fixedly installed on the outer wall of the side where the oil inlet pipe 301 and the oil outlet pipe 302 are close to each other. The oil pump 304 is fixedly installed on the inner wall of the rear axle housing 1. The model of the oil pump 304 is MPB030BAB.

[0018] In addition, the radiator 5 is located on one side of the rear axle housing 1. The outlet of the radiator 5 is fixedly connected to one end of the inlet pipe 404, and the inlet of the radiator 5 is fixedly connected to one end of the outlet pipe 405. The radiator 5 can be fixed to the water tank frame on the existing vehicle body. The radiator 5 is the engine radiator of the CLH13 car, which meets the heat dissipation requirements of the lubricating oil in the rear axle housing 1.

[0019] In addition, the differential 6 is fixedly mounted on the rear axle housing 1 by screws. The differential 6 is a common bevel gear differential, which has a compact structure and small weight, and is widely used in construction machinery and trucks.

[0020] In addition, the two half-shafts 7 are disposed in the rear axle housing 1, and the ends of the two half-shafts 7 that are close to each other mesh with the gears of the differential 6.

[0021] In addition, the two splined shafts 8 are fixedly mounted on one end of the rear axle housing 1 by screws, and the two brakes 9 are fixedly mounted on the splined shafts 8 by screws. The brakes 9 consist of brake pads, brake discs, calipers and flanges.

[0022] In addition, the two wheel-side reducers 10 are fixedly mounted on the brake 9 and rotatably connected to the spline shaft 8. The two wheel-side reducers 10 are connected to the ends of the half shaft that are far apart from each other. A set of planetary gears is installed inside the wheel-side reducers 10. Its core function is to achieve efficient and stable power transmission and distribution through the coordinated work of multiple gears. It also has a compact structure, high load-bearing capacity and diversified transmission functions.

[0023] Working principle: Step 1: Under high load and high temperature conditions, oil pump 304 pumps lubricating oil into inlet pipe 301 through oil delivery pipe 308. The lubricating oil flows from oil pipe 301 into cooling oil pipe 403. At this time, the vehicle ECU sends low-temperature coolant from the outlet of radiator 5 into sealed housing 404 through inlet pipe 404. While flowing in sealed housing 404, the coolant absorbs the heat of the lubricating oil and flows back into radiator 5 through outlet pipe. At this time, the cooled lubricating oil flows out of cooling oil pipe 403 and then through outlet pipe 302 back into rear axle housing 1.

[0024] Step 1: In a low-temperature environment, oil pump 304 pumps lubricating oil into inlet pipe 301 through oil delivery pipe 308. The lubricating oil flows from oil pipe 301 into cooling oil pipe 403. At this time, the vehicle ECU sends high-temperature coolant from the outlet of radiator 5 into sealed housing 404 through inlet pipe 404. While the coolant flows in sealed housing 404, it heats the lubricating oil. After being heated, the coolant flows back into radiator 5 through outlet pipe. At this time, the heated lubricating oil flows out of cooling oil pipe 403 and then through outlet pipe 302 back into rear axle housing 1.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

Claims

1. A small stamped wheel-side rear axle device suitable for harsh working conditions, characterized in that, include: The rear axle housing (1), two brackets (2), a conveyor assembly (3), a heat exchanger (4), a radiator (5), a differential (6), two half-shafts (7), two splined shafts (8), two brakes (9), and two wheel-side reducers (10). The conveyor assembly (3) includes an oil inlet pipe (301), an oil outlet pipe (302), two cover plates (303), and an oil pump (304). The heat exchanger (4) includes a sealed housing (401), two fixing plates (402), multiple cooling oil pipes (403), a water inlet pipe (404), and a water outlet pipe (405). The sealed housing (401) is fixed. Installed on the inner wall of the rear axle housing (1), the two fixing plates (402) are fixedly installed on the inner wall of the sealing shell (401), and the multiple cooling oil pipes (403) are evenly distributed in the sealing shell (401) and fixedly connected to the two fixing plates (402). One end of the water inlet pipe (404) is fixedly installed on the outer wall of the sealing shell (401), and the water inlet pipe (404) is fixedly connected to the outer wall of the rear axle housing (1). One end of the water outlet pipe (405) is fixedly installed on the outer wall of the sealing shell (401), and the water outlet pipe (405) is fixedly connected to the outer wall of the rear axle housing (1).

2. The small stamped wheel-side rear axle device suitable for harsh working conditions according to claim 1, characterized in that: Both brackets (2) are welded to the outer wall of the rear axle housing (1). One end of the oil inlet pipe (301) is fixedly installed on the oil outlet of the oil pump (304). The other end of the oil inlet pipe (301) is fixedly connected to the cover plate (303) near the oil pump (304). The oil outlet pipe (302) is fixedly installed on the cover plate (303) away from the oil pump (304). The two cover plates (303) are fixedly installed on the outer wall of the side where the oil inlet pipe (301) and the oil outlet pipe (302) are close to each other. The oil pump (304) is fixedly installed on the inner wall of the rear axle housing (1).

3. The small stamped wheel-side rear axle device suitable for harsh working conditions according to claim 1, characterized in that: The radiator (5) is located on one side of the rear axle housing (1). The outlet of the radiator (5) is fixedly connected to one end of the inlet pipe (404), and the inlet of the radiator (5) is fixedly connected to one end of the outlet pipe (405).

4. A small stamped wheel-side rear axle device suitable for harsh working conditions according to claim 1, characterized in that: The differential (6) is fixedly mounted on the rear axle housing (1) by screws.

5. A small stamped wheel-side rear axle device suitable for harsh working conditions according to claim 1, characterized in that: The two half-shafts (7) are disposed in the rear axle housing (1), and the ends of the two half-shafts (7) that are close to each other mesh with the gears of the differential (6).

6. A small stamped wheel-side rear axle device suitable for harsh working conditions according to claim 1, characterized in that: The two splined shafts (8) are fixedly mounted on one end of the rear axle housing (1) by screws, and the two brakes (9) are fixedly mounted on the splined shafts (8) by screws.

7. A small stamped wheel-side rear axle device suitable for harsh working conditions according to claim 1, characterized in that: The two wheel-side reducers (10) are fixedly mounted on the brake (9) and rotatably connected to the spline shaft (8). The two wheel-side reducers (10) are connected to the ends of the half shaft (7) that are far apart from each other.

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