阅读说明：本技术 一种车辆冲击过载保护装置和具有其的车辆 (Vehicle impact overload protection device and vehicle with same ) 是由 范亘 许红伟 肖军 席玉岭 于 2020-06-05 设计创作，主要内容包括：本发明提供一种车辆冲击过载保护装置和具有其的车辆,车辆冲击过载保护装置包括：驱动半轴,驱动半轴包括：第一连接部；第二连接部；轮毂轴承法兰盘,轮毂轴承法兰盘内限定有自一端向另一端径向尺寸逐渐减小的腔体,轮毂轴承法兰盘套设在第二连接部上,第二连接部的另一端伸出轮毂轴承法兰盘的一端；锥套,锥套形成为内径尺寸自一端向另一端逐渐增大且外径尺寸自一端向另一端逐渐减小的筒体,锥套设在腔体内且套设在第二连接部上,锥套的内壁面与第二连接部的外壁面相对固定且外壁面与轮毂轴承法兰盘的内壁面摩擦连接；锁紧件。本发明的车辆冲击过载保护装置能够在驱动半轴承受的瞬间冲击扭矩过大时,使驱动半轴发生打滑,避免驱动半轴的断裂。(The invention provides a vehicle impact overload protection device and a vehicle with the same, wherein the vehicle impact overload protection device comprises: a drive axle shaft, the drive axle shaft comprising: a first connection portion; a second connecting portion; a cavity with the radial size gradually reduced from one end to the other end is defined in the hub bearing flange, the hub bearing flange is sleeved on the second connecting part, and the other end of the second connecting part extends out of one end of the hub bearing flange; the taper sleeve is formed into a cylinder body, the inner diameter of the cylinder body is gradually increased from one end to the other end, the outer diameter of the cylinder body is gradually decreased from one end to the other end, the taper sleeve is arranged in the cavity and sleeved on the second connecting part, the inner wall surface of the taper sleeve and the outer wall surface of the second connecting part are relatively fixed, and the outer wall surface of the taper sleeve is in friction connection with the inner wall surface of the hub bearing flange plate; and a locking member. The vehicle impact overload protection device can enable the driving half shaft to slip when the instant impact torque borne by the driving half shaft is overlarge, so that the breakage of the driving half shaft is avoided.)

1. A vehicle impact overload protection apparatus for transmitting torque input from a differential sensor to a wheel, comprising:

a drive axle shaft, the drive axle shaft comprising:

one end of the first connecting part is connected with the differential sensor;

one end of the second connecting part is connected with the other end of the first connecting part, and the other end of the second connecting part is formed into a rod body of which the radial size is gradually reduced from one end to the other end;

a cavity with the radial size gradually reduced from one end to the other end is defined in the hub bearing flange, the hub bearing flange is sleeved on the second connecting part, and the other end of the second connecting part extends out of one end of the hub bearing flange;

the taper sleeve is formed into a cylinder body, the inner diameter of the cylinder body is gradually increased from one end to the other end, the outer diameter of the cylinder body is gradually decreased from one end to the other end, the taper sleeve is arranged in the cavity and sleeved on the second connecting portion, the inner wall surface of the taper sleeve is relatively fixed with the outer wall surface of the second connecting portion, and the outer wall surface of the taper sleeve is in friction connection with the inner wall surface of the hub bearing flange plate;

the locking piece is sleeved at the other end of the second connecting portion and abuts against one end of the taper sleeve.

2. The vehicle impact overload protection device of claim 1, wherein the outer wall surface of the one end of the cone sleeve extends radially outward to form a stop portion that stops against the hub bearing flange.

3. The vehicle impact overload protection device of claim 1, wherein the taper sleeve is circumferentially provided with a notch, and the outer wall surface of the second connecting portion is provided with a matching groove corresponding to the notch, and further comprising:

the flat key is arranged in the notch and the matching groove so that the taper sleeve and the second connecting part are relatively fixed.

4. A vehicle impact overload protection apparatus according to claim 3, wherein the other end of the taper sleeve is provided with a slit extending axially therealong and communicating with the notch.

5. The vehicle impact overload protection device of claim 1, wherein the other end of the second connecting portion extending out of the cavity is formed as a cylinder, and the locking member is formed as a nut threadedly coupled to the other end of the second connecting portion.

6. The vehicle impact overload protection device of claim 1, further comprising:

the gasket is sleeved on the second connecting portion, two sides of the second connecting portion are respectively abutted against the locking piece and the taper sleeve.

7. The vehicle impact overload protection device of claim 1, wherein a gap is defined between an outer wall surface of the second connection portion at the one end and an inner wall surface of the hub bearing flange, and further comprising:

the bearing is arranged in the gap and sleeved at one end of the second connecting part.

8. The vehicle impact overload protection device of claim 1, wherein the taper of the outer wall surface of the taper sleeve is less than the taper of the outer wall surface of the second connection portion.

9. The vehicle impact overload protection device of claim 8, wherein the taper of the outer wall surface of the taper sleeve is between 2 ° and 3 °, and the taper of the outer wall surface of the second connection portion is between 4 ° and 6 °.

10. A vehicle comprising a vehicle impact overload protection apparatus as claimed in any one of claims 1 to 9.

Technical Field

The invention relates to the field of vehicles, in particular to a vehicle impact overload protection device and a vehicle with the same.

Background

In the running process of a vehicle, particularly an off-road vehicle, the instantaneous impact torque value of a driving half shaft is too large due to the bad running environment, so that the driving half shaft is broken, and the vehicle is very dangerous.

Disclosure of Invention

In view of the above, the present invention provides a vehicle impact overload protection device.

The invention also provides a vehicle with the vehicle impact overload protection device.

In order to solve the technical problems, the invention adopts the following technical scheme:

a vehicle impact overload protection apparatus according to an embodiment of a first aspect of the present invention is for transmitting torque input from a differential sensor to a wheel, the vehicle impact overload protection apparatus including:

a drive axle shaft, the drive axle shaft comprising: one end of the first connecting part is connected with the differential sensor; one end of the second connecting part is connected with the other end of the first connecting part, and the other end of the second connecting part is formed into a rod body of which the radial size is gradually reduced from one end to the other end;

a cavity with the radial size gradually reduced from one end to the other end is defined in the hub bearing flange, the hub bearing flange is sleeved on the second connecting part, and the other end of the second connecting part extends out of one end of the hub bearing flange;

the taper sleeve is formed into a cylinder body, the inner diameter of the cylinder body is gradually increased from one end to the other end, the outer diameter of the cylinder body is gradually decreased from one end to the other end, the taper sleeve is arranged in the cavity and sleeved on the second connecting portion, the inner wall surface of the taper sleeve is relatively fixed with the outer wall surface of the second connecting portion, and the outer wall surface of the taper sleeve is in friction connection with the inner wall surface of the hub bearing flange plate;

the locking piece is sleeved at the other end of the second connecting portion and abuts against one end of the taper sleeve.

Furthermore, the outer wall surface of one end of the taper sleeve extends outwards along the radial direction of the taper sleeve to form a stop part which stops against the hub bearing flange plate.

Further, be equipped with the breach in the circumference of taper sleeve, be equipped with on the outer wall of second connecting portion with the corresponding cooperation groove of breach still includes:

the flat key is arranged in the notch and the matching groove so that the taper sleeve and the second connecting part are relatively fixed.

Furthermore, the other end of the taper sleeve is provided with a gap which extends along the axial direction of the taper sleeve and is communicated with the notch.

Further, the other end of the second connecting portion, which extends out of the cavity, is formed into a cylinder, the locking member is formed into a nut, and the nut is in threaded connection with the other end of the second connecting portion.

Further, the vehicle impact overload protection device further comprises: the gasket is sleeved on the second connecting portion, two sides of the second connecting portion are respectively abutted against the locking piece and the taper sleeve.

Further, a gap is defined between an outer wall surface of one end of the second connecting portion and an inner wall surface of the hub bearing flange, and the hub bearing flange further comprises: the bearing is arranged in the gap and sleeved at one end of the second connecting part.

Further, the taper of the outer wall surface of the taper sleeve is smaller than that of the outer wall surface of the second connecting part.

Further, the taper of the outer wall surface of the taper sleeve is 2-3 degrees, and the taper of the outer wall surface of the second connecting part is 4-6 degrees.

A vehicle according to an embodiment of the second aspect of the invention includes the vehicle impact overload protection apparatus of the above-described embodiment.

The technical scheme of the invention has the following beneficial effects:

according to the vehicle impact overload protection device provided by the embodiment of the invention, the matching structure of the driving half shaft and the hub bearing flange is changed from traditional spline matching into conical friction matching, and the magnitude of the transmitted friction force is adjusted through the locking piece.

Drawings

FIG. 1 is a schematic structural diagram of a vehicle impact overload protection apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a taper sleeve of the vehicle impact overload protection device according to the embodiment of the invention;

fig. 3 is a schematic view of another structure of a taper sleeve of the vehicle impact overload protection device according to the embodiment of the invention.

Reference numerals

Vehicle impact overload protection device 100; a drive half shaft 10; a first connection portion 11; a second connecting portion 12; a hub bearing flange 20; a taper sleeve 30; a notch 31; a slit 32; a stopper portion 33; a retaining member 40; a flat key 50; a spacer 60; hub bearing support 70.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.

First, a vehicle impact overload protection apparatus 100 for transmitting torque input from a differential sensor to a wheel according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings, wherein the vehicle impact overload protection apparatus 100 includes a drive axle shaft 10, a hub bearing flange 20, a taper sleeve 30 and a locking member 40.

Specifically, the driving axle shaft 10 includes a first connecting portion 11 and a second connecting portion 12, one end of the first connecting portion 11 is connected to the differential sensor, one end of the second connecting portion 12 is connected to the other end of the first connecting portion 11, the other end is formed as a rod body whose radial dimension gradually decreases from one end to the other end, a cavity whose radial dimension gradually decreases from one end to the other end is defined in the hub bearing flange 20, the hub bearing flange 20 is sleeved on the second connecting portion 12, the other end of the second connecting portion 12 extends out of one end (left end in fig. 1) of the hub bearing flange 20, the taper sleeve 30 is formed as a cylinder whose inner diameter size gradually increases from one end to the other end and whose outer diameter size gradually decreases from one end to the other end, the taper sleeve 30 is disposed in the cavity and sleeved on the second connecting portion 12, an inner wall surface of the taper sleeve 30 is relatively fixed to an outer wall surface of the second connecting portion 12, the locking member 40 is sleeved on the other end of the second connecting portion 12 and stops against one end of the taper sleeve 30.

In other words, as shown in fig. 1, the vehicle impact overload protecting apparatus 100 is mainly composed of a driving axle shaft 10, a hub bearing flange 20, a taper sleeve 30 and a locking member 40, wherein, the driving half shaft 10 mainly comprises a first connecting part 11 and a second connecting part 12, the first connecting part 11 is connected with the differential sensor, a taper sleeve 30 is sleeved on the second connecting part 12, a hub bearing flange 20 is sleeved on the taper sleeve 30, a hub bearing seat 70 is arranged outside the hub bearing flange 20, the taper sleeve 30 is in friction connection with the hub bearing flange 20, namely, the matching structure of the driving half shaft 10 and the hub bearing flange 20 is changed from the traditional spline matching into the conical friction matching, a locking part 40 is also sleeved at the other end of the second connecting part 12, according to the torque requirements of driving half shafts of different vehicle types, the magnitude of the transmitted friction force can be adjusted by adjusting the locking piece 40. When the device is used, when the torque born by the two ends of the vehicle impact overload protection device 100 is greater than a specified value, the matched conical surface between the taper sleeve 30 and the hub bearing flange plate 20 begins to slip, and the torque born by the driving half shaft 10 is not increased any more, so that the driving half shaft 10 is protected, and the overload is prevented from being broken; when the vehicle impact overload protection device 100 frequently generates overload slipping, serious abrasion and the transmission torque does not meet the requirement, the vehicle impact overload protection device 100 can be adjusted through the locking piece 40, so that the performance of the vehicle impact overload protection device 100 for transmitting the torque is ensured, and the service life of the vehicle impact overload protection device 100 is ensured.

Therefore, according to the vehicle impact overload protection device 100 of the embodiment of the invention, by changing the matching structure of the driving half shaft 10 and the hub bearing flange plate 20 from the traditional spline fit into the conical friction fit and adjusting the magnitude of the transmitted friction force through the locking piece 40, the vehicle impact overload protection device 100 not only has a simple structure, but also can enable the driving half shaft 10 to slip when the transient impact torque borne by the driving half shaft 10 is too large, and effectively avoids the breakage of the driving half shaft.

According to some specific embodiments of the present invention, the outer wall surface of one end of the taper sleeve 30 extends outward along the radial direction thereof to form a stop portion which stops against the hub bearing flange 20, and the stop portion can be detached by a special tool, so that the assembly and disassembly are convenient.

Preferably, the taper sleeve 30 is provided with a notch 31 in the circumferential direction, the outer wall surface of the second connecting portion 12 is provided with a matching groove corresponding to the notch 31, and the taper sleeve further comprises a flat key 50, and the flat key 50 is arranged in the notch 31 and the matching groove to fix the taper sleeve 30 and the second connecting portion 12 relatively.

That is, the taper sleeve 30 and the drive half shaft 10 are rigidly connected by the flat key 50, the torque transmission is realized by the matching of the outer wall surface of the taper sleeve 30 and the inner wall surface of the hub bearing flange 20, the transmission area of the taper surface is large, and the initial torque of the adjusting nut can be reduced. The flat key 50 fixes the taper sleeve 30 and the driving half shaft 10 into a whole to ensure that the taper sleeve and the driving half shaft move together.

According to another embodiment of the present invention, as shown in fig. 2 and 3, the other end of the taper sleeve 30 is provided with a slit 32 extending along the axial direction thereof and communicating with the notch 31, in other words, one side of the taper sleeve 30 is not closed but provided with the slit 32, so that the radial dimension of the taper sleeve 30 can be easily adjusted to facilitate the driving half shaft 10 to fixedly tighten the taper sleeve 30 during operation.

Preferably, the other end of the second connecting portion 12 protruding out of the cavity is formed as a cylinder, and the locker 40 is formed as a nut threadedly coupled with the other end of the second connecting portion 12. The small-diameter adjusting nut is adopted to realize the adjustability of the slipping torque, and meanwhile, the adjusting force is reduced.

According to an embodiment of the present invention, the vehicle impact overload protection device 100 further includes a spacer 60, wherein the spacer 60 is disposed on the second connecting portion 12 and stops against the locking member 40 and the taper sleeve 30 at two sides.

Optionally, a gap 80 is defined between an outer wall surface of one end of the second connecting portion 12 and an inner wall surface of the hub bearing flange 20, and the vehicle impact overload protection apparatus 100 further includes a bearing (not shown) disposed in the gap 80 and sleeved on one end of the second connecting portion 12. The inner ring of the bearing can rotate relative to the driving half shaft 10, and the axial locking function is increased.

In one embodiment of the invention, the taper of the outer wall surface of the drogue 30 is less than the taper of the outer wall surface of the second connection portion 12.

That is to say, the interior outer wall surface of taper sleeve 30 forms respectively into interior external conical surface, and in order to guarantee to dismantle conveniently, the tapering of interior conical surface is greater than the tapering of external conical surface, and the tapering of the outer surface of avoiding of second connecting portion 12 corresponds with the tapering of the interior conical surface of taper sleeve 30, and the interior conical surface of taper sleeve 30 cooperates with drive half axle 10, and the two are fixed together through flat key 50 in order to realize rigid connection to can guarantee that in the torque transmission process, taper sleeve 30 and drive half axle 10 do not take place relative motion, and taper sleeve 30 external conical surface cooperates with wheel hub bearing ring flange 20, transmits the moment of torsion through the conical surface cooperation.

The locking piece 40 is in threaded fit with the driving half shaft 10, the locking piece 40 is rotated, the gasket 60 and the taper sleeve 30 are pushed, the taper sleeve 30 and the conical surface of the hub bearing flange plate 20 are pressed tightly to generate friction force, and the slip torque can be set through the tightening torque of the locking piece 40; when the hub bearing is in work, when the input torque is smaller than a set value, the taper sleeve 30 and the hub bearing flange plate 20 do not slip, and the torque can be normally transmitted; when the input torque is larger than the set value, the taper sleeve 30 and the hub bearing flange plate 20 slip, the power transmission is interrupted, and the impact overload protection is realized.

Furthermore, the taper of the outer wall surface of the taper sleeve 30 is 2 degrees to 3 degrees, so that the taper is convenient to disassemble, and the taper of the outer wall surface of the second connecting part 12 is 4 degrees to 6 degrees, so that the self-locking is convenient.

In summary, according to the vehicle impact overload protection apparatus 100 of the embodiment of the present invention, by changing the fitting structure of the driving half shaft 10 and the hub bearing flange 20 from the conventional spline fitting to the conical friction fitting and adjusting the magnitude of the transmitted friction force by the locking member 40, the vehicle impact overload protection apparatus 100 is not only simple in structure, but also capable of slipping the driving half shaft 10 when the transient impact torque applied to the driving half shaft 10 is too large, thereby effectively preventing the driving half shaft from breaking.

The vehicle according to the embodiment of the present invention includes the vehicle impact overload protection device 100 according to the above-mentioned embodiment, and since the vehicle impact overload protection device 100 according to the above-mentioned embodiment of the present invention has the above-mentioned technical effects, the vehicle according to the embodiment of the present invention also has the corresponding technical effect that the driving half shaft 10 can be slipped when the transient impact torque received by the driving half shaft 10 is too large, and the breakage of the driving half shaft can be effectively avoided.

Other structures and operations of the vehicle according to the embodiment of the present invention will be understood and readily implemented by those skilled in the art, and thus will not be described in detail.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.