CN219191908U - Split type wheel-side speed reducer assembly with central inflation and deflation system - Google Patents

Abstract

The utility model provides a split type wheel-side speed reducer assembly with a central inflation and deflation system, which belongs to the technical field of wheel-side speed reducers and comprises a bell-shaped drum assembly, a hub assembly, a brake caliper support and a steering assembly which are sequentially connected. Through changing the knuckle into two structures, can realize whole car width's regulation, avoid developing a plurality of knuckles, realize wheel hub's atmospheric pressure balance moreover.

Description

Split type wheel-side speed reducer assembly with central inflation and deflation system

Technical Field

The utility model relates to the technical field of wheel-side reducers, in particular to a split wheel-side reducer assembly with a central inflation and deflation system.

Background

Along with the requirements of automobile technical development and special working conditions in China, the requirements on parts and functions thereof are gradually increased, particularly the requirements of special vehicles on wheel systems, the requirements on air tightness of air passages such as central inflation and deflation and the like are met, the connecting structure of a steering knuckle and a whole automobile is complex, in the development process of the steering knuckle, if the existing steering knuckle is forged, the steering knuckle is large, forging manufacturability is poor, the requirements on equipment are extremely high, if a steering knuckle assembly with a casting structure is adopted, casting defects easily occur at the air passage position to cause air leakage, the rejection rate of the steering knuckle is high, and the cost loss is high.

Because of the use environment of the special vehicle and the specificity of users, the special vehicle is not limited by the traditional regulations, and the development of the vehicle is mainly based on actual demands, and the vehicle is unoriented, so that the vehicles with ultra-wide, overweight, ultra-long and the like are very common; if the length of the vehicle is increased, the number of the whole vehicle axles needs to be increased, so that 6x6, 8x8, 10x10, 12x12 and the like appear; if the special vehicle has the wheel track increasing requirement, only three schemes are feasible at present, namely, the width of the frame is increased; 2. changing a suspension hard point; 3. the length of the wheel rim is increased.

The first scheme increases the width of the frame, so that the change of the whole vehicle and the related parts of the frame is larger, the risk of changing the hard point of the suspension is larger, the whole vehicle is required to be subjected to a shaping test again, and the general design process is not recommended; if the wheel edge length is increased according to the third implementation of the scheme, different wheel edge systems are required to be developed for each wheel track; different knuckles (wheel trucks) were developed to match the whole vehicle.

In addition, the requirements of special vehicles on wheel systems and the requirements on air tightness of air passages such as central inflation and deflation and the like lead to complex connecting structures of the steering knuckle and the whole vehicle, so that in the development process of the steering knuckle, if the steering knuckle is forged, the steering knuckle is large, the forging manufacturability is poor, and the requirements on equipment are extremely high; if the steering knuckle with the casting structure is adopted, casting defects easily occur at the air passage part to cause air leakage, the rejection rate of the steering knuckle is higher, and the cost loss is larger.

Disclosure of Invention

In order to make up for the defects, the utility model provides a split type wheel-side speed reducer assembly with a central inflation and deflation system, and aims to solve the problem of developing different steering knuckles (wheel frames) to match the air tightness of the whole vehicle and an air passage.

The utility model is realized in the following way: the utility model provides a split type wheel-side speed reducer assembly with a central inflation and deflation system, which comprises a bell-shaped drum assembly, a hub assembly, a brake caliper bracket and a steering assembly which are sequentially connected, wherein the steering assembly comprises a half-axle tube and a steering knuckle, the steering knuckle is in interference fit with the half-axle tube, the half-axle tube is provided with an inflation channel and a deflation channel, and the deflation channel is higher than the inflation channel.

The wheel hub assembly comprises a wheel hub, a brake disc, a wheel hub inner bearing, a wheel hub outer bearing, an oil seal, a dust ring, an oil gas seal, a clamping ring, a tire bolt and a gas release joint which are connected in a matched mode, wherein the oil gas seal and the oil seal are pressed in an inner hole of the wheel hub, and the gas filling channel and the gas release channel are respectively communicated with the corresponding oil gas seal.

In one embodiment of the utility model, the interface between the axle tube and the knuckle is cooled with liquid nitrogen to allow the axle tube to fit into the central bore of the knuckle.

In one embodiment of the utility model, a locating pin and a bolt are arranged at the joint of the half-axle tube and the knuckle.

In one embodiment of the utility model, the half shaft tube is of a forged construction and the knuckle is of a cast construction.

In one embodiment of the utility model, the bell-shaped drum assembly comprises a planet frame, a bell-shaped drum, a planet pin and a planet, the planet being located between the planet frame and the bell-shaped drum, the planet pin being able to position it in turn.

The beneficial effects of the utility model are as follows: according to the split type wheel-side speed reducer assembly with the central inflation and deflation system, which is obtained through the design, when the split type wheel-side speed reducer assembly is used, the steering knuckle is arranged to be of a two-section structure, so that the quick replacement can be realized on the width of a transformation vehicle, the front connection and fixation of the steering knuckle and the wheel-side speed reducer assembly can be realized in a liquid nitrogen cooling mode, and the stable connection of the end faces can be ensured; meanwhile, the knuckle realizes the central inflation and deflation functions, a fixed air source is introduced into the moving tire, the cost is low, and meanwhile, after the automobile test field is tested, the effect is good, and the problem of oil leakage and air leakage does not occur in the test stage; the gear oil is not pushed into the tire when the tire is inflated; the inflation of the vehicle tires in the running process of the vehicle is realized, the continuous running of the vehicle is ensured, the time is saved, and the running operation is completed; the technical problems of oil seal oil leakage caused by the increase of the temperature of gear oil and the increase of the air pressure in the hub oil cavity due to the meshing movement of the gear of the hub reduction gear are solved; the steering knuckle discharges redundant gas in the hub oil cavity through the air release hole, so that the air pressure in the hub cavity is ensured to be stable;

1. the key point of the method is that the integrally cast steering knuckle is divided into a half-shaft sleeve and a steering knuckle structure, so that waste loss caused by air leakage due to casting defects in the processing process of the air charging channel is avoided;

2. because the half-shaft sleeve and the steering knuckle are of a two-body structure, when vehicles with different widths are required, the width of the whole vehicle can be adjusted only by adjusting the lengths of the half-shaft sleeve and the half-shaft, so that the waste of a die tool caused by developing a plurality of steering knuckles is avoided;

3. the design increases the balance pressure air passage, the temperature in the wheel edge is increased in the high-speed running process of the vehicle, and after the air pressure is increased, air overflows from the balance pressure air passage, so that the oil leakage phenomenon of the hub oil seal caused by the increase of the pressure in the cavity is avoided;

4. the axle sleeve and the steering knuckle are combined into a whole through interference fit after being cooled by liquid nitrogen and the axle sleeve and the steering knuckle are restored to normal environment temperature, and meanwhile, in order to ensure the relative positions of the axle sleeve and the steering knuckle, a locating pin is adopted between the two parts to locate; after the assembly is assembled, the assembly body and the assembly body are connected by bolts, so that the reliability of end face connection is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a cross-sectional view of a split wheel-side reducer assembly with a central inflation and deflation system provided in accordance with an embodiment of the present utility model;

FIG. 2 is a side view of a split wheel-side reducer assembly with a central inflation and deflation system according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of a half shaft tube in a split wheel-side reducer assembly with a central inflation and deflation system according to an embodiment of the present utility model;

FIG. 4 is a cross-sectional view of the other side of the half shaft tube of the split wheel-side reducer assembly with a central inflation and deflation system according to an embodiment of the present utility model;

FIG. 5 is a cross-sectional view of a split hub reduction gear assembly with a central inflation and deflation system according to an embodiment of the present utility model;

FIG. 6 is a front view of a bell drum assembly of a split wheel-side reducer assembly with a central inflation and deflation system according to an embodiment of the present utility model;

fig. 7 is a cross-sectional view of a hub assembly in a split hub reduction gear assembly with a central inflation and deflation system according to an embodiment of the present utility model.

In the figure: 1-a bell drum assembly; 11-a planet frame; 12-a bell-shaped drum; 13-a planet pin shaft; 14-planetary wheels; 2-a hub assembly; 21-a hub; 22-brake disc; 23-an inner hub bearing; 24-an outer hub bearing; 25-oil seal; 26-a dust ring; 27-oil and gas seal; 28-snap ring; 29-tire bolts; 30-a gas release joint; 3-a brake caliper; 4-a caliper bracket; a 5-turn assembly; 51-a half shaft tube; 511-an air-filled duct; 512-discharge channel; 52-knuckle.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Examples

Referring to fig. 1 to 7, the present utility model provides a technical solution: the utility model provides a split type wheel-side speed reducer assembly with a central inflation and deflation system, which comprises a bell-shaped drum assembly 1, a hub assembly 2, a brake caliper 3, a brake caliper bracket 4 and a steering assembly 5 which are sequentially connected, wherein the steering assembly 5 comprises a half-shaft tube 51 and a steering knuckle 52, the steering knuckle 52 is in interference fit with the half-shaft tube 51, specifically, the interface of the half-shaft tube 51 and the steering knuckle 52 is cooled by liquid nitrogen, so that the half-shaft tube 51 is installed in a central hole of the steering knuckle 52, after the half-shaft tube 51 and the steering knuckle 52 are restored to normal environment temperature, the half-shaft tube 51 and the steering knuckle 52 are combined into a whole through interference fit, and in order to ensure the relative positions of the half-shaft tube 51 and the steering knuckle 52, a positioning pin is adopted between the two fits for positioning; after the assembly is assembled, the assembly body and the assembly body are connected by bolts, so that the reliability of end face connection is ensured. The half axle tube 51 is of a forging structure, the knuckle 52 is of a casting structure, and the half axle tube 51 is of a forging structure and mainly plays a role in connecting the knuckle 52 and the brake caliper bracket 4 and supporting the bearing inner ring assembly hub 21. The steering knuckle 52 is mainly connected with the half axle tube 51 at one end and the whole vehicle suspension control arm and the steering pull rod at the other end, so as to realize the steering and supporting functions of the whole vehicle. The half shaft tube 51 is provided with an air charging passage 511 and an air discharging passage 512, and the air discharging passage 512 is higher than the air charging passage 511.

The joint of the half axle tube 51 and the knuckle 52 is provided with a locating pin and bolts, the two locating pins with the diameter of 16mm are used for locating, and 10 bolts M16X1.5 are connected to form a knuckle assembly; the inner side of the hub assembly 2 is matched with the thrust ring through two oil seals 25 and a dust seal to play a role in sealing; the flange end surface of the hub 21 and the bell drum assembly 1 are sealed through an O-shaped ring, and meanwhile, the flange end surface of the hub 21 is connected with a whole vehicle tire through a tire bolt 29 assembled on the hub 21, so that the tire supporting effect is realized; the wheel hub inner bearing 23 ring is connected with the half shaft tube 51 tube in a matched mode, the wheel hub outer bearing 24 and the gear ring support are locked through two threaded rings and a locking gasket, and axial movement of the wheel hub outer bearing 24 and the gear ring support is limited; after the assembly is completed, the hollow cavity between the oil-gas seals 27 of the hub 21 is ensured to contain the vent channel outlet of the semi-axle tube 51; the balance pressure air passage is communicated with the oil cavity at the outer side of the oil gas seal 27, and the air passage balances the air pressure; the bell drum assembly 1 is connected to the hub assembly 2 by five bolts and is sealed with a 0-type ring while ensuring that the tire bolts 29 pass over the outer edge of the bell drum 12 to transfer the sun gear transfer torque in the bell drum 12 to the hub assembly 2. The cross section of the bell-shaped drum 12 is sealed by an end cover punched by a steel plate, so that the whole wheel edge is ensured to be oil-proof.

Referring to fig. 1 and 7, the hub assembly 2 includes a hub 21, a brake disc 22, an inner hub bearing 23, an outer hub bearing 24, an oil seal 25, a dust ring 26, an oil seal 27, a snap ring 28, a tire bolt 29 and a bleed joint 30, which are cooperatively connected, wherein the oil seal 27 and the oil seal 25 are pressed and fitted in an inner hole of the hub 21, and an air charging channel 511 and an air discharging channel 512 are respectively communicated with the corresponding oil seal 27. Specifically, the structure can introduce a fixed air source into the moving tire, has low cost, and has good effect after the automobile test field is tested, and the problem of oil leakage and air leakage does not occur in the test stage; the gear oil is not pushed into the tire when the tire is inflated; the inflation of the vehicle tires in the running process of the vehicle is realized, the continuous running of the vehicle is ensured, the time is saved, and the running operation is completed; the technical problems of rising of gear oil temperature caused by gear meshing movement of the hub reduction gear and oil leakage of the oil seal 25 caused by increased air pressure in the oil cavity of the hub 21 are solved; the knuckle 52 discharges redundant gas in the oil cavity of the hub 21 through the bleed hole, and ensures that the air pressure in the oil cavity of the hub 21 is stable.

Referring to fig. 1, 5 and 6, the bell drum assembly 1 includes a planet frame 11, a bell drum 12, a planet pin 13 and a planet 14, the planet 14 being located between the planet frame 11 and the bell drum 12, the planet pin 13 being capable of positioning them in sequence. Specifically, the bell-shaped drum assembly 1 is an assembly with 5 planetary gears 14 centered through planetary gear pin shafts 13, and the bell-shaped drum 12 and the planetary frame 11 are axially restrained, and mainly plays roles in transmitting torque output by a sun gear and reducing rotation speed.

Specifically, the split type wheel-side speed reducer assembly with the central inflation and deflation system has the working principle that: when the steering knuckle is used, the steering knuckle is arranged to be of a two-section structure, so that the steering knuckle can be quickly replaced in the width of the transformation vehicle, the front connection and fixation of the steering knuckle and the transformation vehicle are realized in a liquid nitrogen cooling mode, and the stable connection of the end faces can be ensured; meanwhile, the knuckle 52 of the structure realizes the central inflation and deflation function, a fixed air source is introduced into the moving tire, the cost is low, and meanwhile, after the automobile test field is tested, the effect is good, and no oil leakage and air leakage problem exists in the test stage; the gear oil is not pushed into the tire when the tire is inflated; the inflation of the vehicle tires in the running process of the vehicle is realized, the continuous running of the vehicle is ensured, the time is saved, and the running operation is completed; the technical problems of rising of gear oil temperature caused by gear meshing movement of the hub reduction gear and oil leakage of the oil seal 25 caused by increased air pressure in the oil cavity of the hub 21 are solved; in the application, the knuckle 52 discharges redundant gas in the oil cavity of the hub 21 through the bleed hole, so that the air pressure in the cavity of the hub 21 is ensured to be stable.

It should be noted that, specific model specifications of the bell-shaped drum assembly 1, the hub assembly 2, the brake caliper 3, the brake caliper bracket 4 and the steering assembly 5 need to be determined by selecting the model according to the actual specifications of the device, etc., and a specific model selection calculation method adopts the prior art in the field, so that detailed description is omitted.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, and various modifications and variations may be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (5)

1. The split wheel-side speed reducer assembly with the central inflation and deflation system comprises a bell-shaped drum assembly (1), a hub assembly (2), a brake caliper (3), a brake caliper bracket (4) and a steering assembly (5) which are sequentially connected, wherein the steering assembly (5) comprises a half-shaft tube (51) and a steering knuckle (52), the steering knuckle (52) is in interference fit with the half-shaft tube (51), the half-shaft tube (51) is provided with an inflation channel (511) and a deflation channel (512), and the deflation channel (512) is higher than the inflation channel (511);

the wheel hub assembly (2) is including wheel hub (21), brake disc (22), wheel hub inner bearing (23), wheel hub outer bearing (24), oil blanket (25), dust ring (26), oil gas seal (27), snap ring (28), tire bolt (29) and gassing joint (30) that the cooperation is connected, oil gas seal (27) with oil blanket (25) pressure-equalizing dress is in the hole of wheel hub (21), wherein, fill air flue (511) and gassing way (512) communicate with corresponding oil gas seal (27) respectively.

2. A split wheel-side reducer assembly with a central inflation and deflation system according to claim 1, wherein the interface of the half-axle tube (51) and the knuckle (52) is cooled by liquid nitrogen, so that the half-axle tube (51) is fitted into the central hole of the knuckle (52).

3. A split wheel-side reducer assembly with a central inflation and deflation system according to claim 2, wherein the connection of the half-axle tube (51) and the knuckle (52) is provided with a locating pin and a bolt.

4. A split wheel-side reducer assembly with a central inflation and deflation system as claimed in claim 3, wherein said half-axle tube (51) is of forged construction and said knuckle (52) is of cast construction.

5. A split hub reduction gear assembly with a central inflation and deflation system according to claim 1, wherein the bell-shaped drum assembly (1) comprises a planet frame (11), a bell-shaped drum (12), a planet pin (13) and a planet (14), the planet (14) being located between the planet frame (11) and the bell-shaped drum (12), the planet pin (13) being in turn positionable.

Images