Low-inertia ceramic aluminum alloy transmission shaft

Abstract

The utility model discloses a low-inertia ceramic aluminum alloy transmission shaft which comprises a shaft tube, the shaft tube is an aluminum alloy piece, and a through hollow cavity is formed along the central axis of the shaft tube; the shaft tube is provided with a supporting end, a transition end and a connecting end, wherein the transition end and the connecting end are sequentially arranged on the two sides of the supporting end, and a ceramic sleeve is fixedly arranged in the connecting end. A containing pipe is further arranged in the supporting end, a liquid storage cavity is arranged and defined between the containing pipe and the supporting end, and the liquid storage cavity is communicated with a liquid outlet formed in the supporting end. The beneficial effects of the utility model are mainly embodied in that the design is exquisite, the integral light weight can be realized through the mutual cooperation of the shaft tube and the ceramic sleeve, the rotational inertia is reduced, the energy loss of the motor and transmission related products is reduced, and the utilization rate is improved. And meanwhile, the problems of cutting loss, waste material loss, cutting fluid loss and the like in the working process of the transmission shaft can be reduced, resource waste is avoided, and wide applicability is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of shafts, in particular to a low-inertia ceramic aluminum alloy transmission shaft. BACKGROUND

[0002] The transmission shaft is an important component for transmitting power in the automobile transmission system, is installed between the transmission and the drive axle, transmits the torque and rotation movement from the transmission to the main reducer of the drive axle, and makes the automobile generate driving force. When the vehicle engine, the transmission and the drive axle are far apart, only one telescopic transmission shaft cannot meet the arrangement requirements. At this time, a telescopic transmission shaft and a front transmission shaft are connected in series. The front end of the front transmission shaft is connected to the transmission, and the rear end is connected to the vehicle frame through the intermediate support. The intermediate support has a bearing inside, which can slide slightly in the axial direction to compensate for the installation deviation of the axial position. In order to reduce the axial force of the bearing, a honeycomb-shaped rubber buffer pad is arranged between the intermediate support and the bearing, which can absorb the vibration during the operation of the vehicle, reduce the noise, and reduce the additional load of the bearing caused by the installation error of the transmission shaft.

[0003] CN111946728A discloses a steel-aluminum welded transmission shaft and its processing method, which includes a connecting flange, a steel transmission shaft pipe, an intermediate support assembly, a thin-walled aluminum alloy pipe, a thick-walled aluminum alloy pipe, an aluminum alloy transmission shaft pipe and a shaft fork. The outer end of the connecting flange is welded to the steel transmission shaft pipe. The outer surface of the steel transmission shaft pipe is welded to the thin-walled aluminum alloy pipe. The outer surface of the thin-walled aluminum alloy pipe is welded to the thick-walled aluminum alloy pipe. However, this welding method will cause the thin-walled aluminum alloy pipe to be subjected to a large impact force during welding, resulting in deformation and affecting the service life. Moreover, the use of a steel transmission shaft pipe will make the entire transmission shaft too heavy and have a large moment of inertia, which cannot meet the lightweight requirement and has great limitations. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the shortcomings of the prior art and provides a low-inertia ceramic aluminum alloy transmission shaft.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions.

[0006] A low-inertia ceramic aluminum alloy transmission shaft, comprising a shaft pipe, the shaft pipe is an aluminum alloy piece, and a hollow cavity is formed through the shaft pipe along the axial line; the shaft pipe has a support end and a transition end and a connecting end arranged in sequence on both sides of the support end, a ceramic sleeve is fixedly arranged in the connecting end; a receiving pipe is further arranged in the support end, and a liquid storage cavity is defined between the receiving pipe and the support end, and the liquid storage cavity is in communication with a liquid outlet formed on the support end.

[0007] Preferably, the included angle between the central axis of the transition end and the horizontal line is 3-6°.

[0008] Preferably, the outer circumferential surface of the ceramic sleeve is provided with a threaded groove, the connecting end is sleeved on the threaded groove, and the threaded groove and the connecting end are fixed through magnetic pulse welding.

[0009] Preferably, the receiving pipe comprises an integral forming receiving end, an inclined end and a horizontal end, and the horizontal end is fixed on the inner wall of the support end through magnetic pulse welding.

[0010] Preferably, the central axes of the shaft pipe, the ceramic sleeve and the receiving pipe are coaxial.

[0011] Preferably, temperature sensing devices or / and optical sensing devices can be fixed on the support end and the receiving end.

[0012] Preferably, a clamping ring is fixed on the inner wall of the support end, the clamping ring is located on one side of the receiving pipe, the clamping end of the clamping ring has a gap with the support end, the thickness of the gap is equal to the thickness of the horizontal end, the other side of the receiving pipe is also provided with a clamping groove opened on the inner wall of the support end, a sealing ring is arranged in the clamping groove, and the sealing ring is always in abutment with the horizontal end.

[0013] The beneficial effects of the utility model mainly reflect in:

[0014] 1. The design is ingenious, the overall lightweight can be realized through the cooperation of the shaft pipe and the ceramic sleeve, the rotational inertia is reduced, the energy loss of the motor and the related products of transmission is reduced, and the utilization rate is improved. At the same time, the cutting loss, waste and cutting fluid loss of the transmission shaft in the working process can also be reduced, resource waste is avoided, and the applicability is wide.

[0015] 2. The receiving pipe can play a supporting role, the deformation of the shaft pipe under high torque is avoided, and the service life is affected. At the same time, the hollow design of the receiving pipe can also greatly reduce the cost, realize the lightweight design, and reduce the rotational inertia.

[0016] 3. The clamping ring can position the receiving pipe, ensure the accuracy of the assembly position of the receiving pipe, in addition, the sealing ring can be arranged in the clamping groove, the receiving pipe is sealed, liquid leakage in the liquid storage cavity is avoided, safety is improved, the assembly structure is simple and convenient, replacement and maintenance are facilitated, and work efficiency is greatly improved.

[0017] 4. The threaded groove can provide effective cutting strength when the ceramic sleeve and the connecting end collide during welding, ensure the joint performance and drawing force of the two, avoid the occurrence of torsional deformation during welding, and improve the service life. BRIEF DESCRIPTION OF DRAWINGS

[0018] The technical scheme of the utility model will be further described in connection with the drawings:

[0019] Fig. 1 The cross-sectional view of the first preferred embodiment of the utility model;

[0020] Fig. 2 The cross-sectional view of the second preferred embodiment of the utility model. DETAILED DESCRIPTION

[0021] The utility model will be described in detail in connection with the specific embodiments shown in the drawings. However, these embodiments are not limited to the utility model, and the changes in structure, method or function made by those skilled in the art based on these embodiments are also included in the protection scope of the utility model.

[0022] In the description of the utility model, it should be pointed out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0023] The utility model will be described in detail in connection with the drawings and embodiments.

[0024] As Figs. 1-2 shown, the utility model discloses a kind of low-inertia ceramic aluminum alloy transmission shaft, including shaft tube 1, the shaft tube 1 is aluminum alloy piece, and hollow cavity 11 is set through along its axis. Above-mentioned, the shaft tube 1 adopts aluminum alloy piece and the design of hollow cavity 11, the weight of the transmission shaft can be greatly reduced, realize light weight, simultaneously, the inertia of the transmission shaft can also be reduced. In addition, in the preferred embodiment, the shaft tube 1 preferably adopts 6061 / 6063 / 7075 etc. aluminum alloy shaft tube, mainly by Al, Mg, Zn etc. Element is composed, realizes shaft tube using cold-drawing process, guarantee that the tensile strength of shaft tube is 180-210Mpa, and ductility is not less than 3%. It is convenient to occur plastic deformation.

[0025] The shaft tube 1 has support end 2 and transition end 3 and connecting end 4 arranged in sequence on both sides of the support end 2, ceramic sleeve 5 is fixedly arranged in the connecting end 4, the setting of ceramic sleeve 5 can greatly improve the wear resistance of the transmission shaft, prolong service life. Ceramic sleeve 5 is mainly Al or other Al base metal, of course, high wear resistance ceramic material, such as some ceramic brake disc etc. can also be used.

[0026] The above design is ingenious, and the overall light weight can be achieved by cooperation of the shaft tube 1 and the ceramic sleeve 5, the rotational inertia is reduced, the energy loss of the motor and the transmission related products is reduced, and the utilization rate is improved. At the same time, the cutting loss, waste and cutting fluid loss of the transmission shaft during work can be reduced, resource waste is avoided, and the applicability is wide.

[0027] The support end 2 is also provided with a containing tube 6, which includes a one-piece containing end 61, an inclined end 62 and a horizontal end 63, and the horizontal end 63 is fixed on the inner wall of the support end 2 by magnetic pulse welding. The central axes of the shaft tube 1, the ceramic sleeve 5 and the containing tube 6 are coaxial. The containing tube 6 and the support end 2 are arranged to define a liquid storage cavity 7, which is in communication with a liquid outlet 21 opened on the support end 2. Among the above, the containing tube 6 can play a supporting role to avoid deformation of the shaft tube 1 under high torque and affect the service life. At the same time, the hollow design of the containing tube can greatly reduce the cost, realize the lightweight design, and reduce the rotational inertia.

[0028] In the preferred embodiment, the liquid storage cavity 7 can store lubricating grease, lubricating oil, high-pressure gas, electronic devices for lubrication, thermal expansion, signal detection instruments and the like, thereby realizing high integration.

[0029] The angle between the central axis of the transition end 3 and the horizontal line is 3-6°, which can ensure the flatness of the surface during welding. The outer circumferential surface of the ceramic sleeve 5 is provided with a threaded groove 51, the connecting end 4 is sleeved on the threaded groove 51, and the two are fixed by magnetic pulse welding. The threaded groove 51 can provide effective cutting strength during the collision of the ceramic sleeve and the connecting end during welding, ensure good joint performance and drawing force, and at the same time, avoid the occurrence of torsional deformation during welding, thereby improving the service life.

[0030] The above uses magnetic pulse welding to fix the shaft tube 1, the ceramic sleeve 5 and the containing tube 6. When welding, the aluminum alloy parts will collide at high speed under the action of the magnetic field, and a large pressure, kinetic energy, Joule heat and the like will be generated in the instant of collision, which can oxidize the aluminum alloy material, so the surface often contains an oxide layer. These oxide layers will undergo a chemical reaction in the instant of collision, thereby making the welding more firm.

[0031] Among the above, the magnetic pulse is composed of a capacitor group, a high-voltage transient switch and a welding coil. A high voltage of 10kv or above is directly charged into the capacitor group through a charger or a transformer, and according to the description of E=CU2 / 2, the higher the voltage, the greater the energy density. The full energy is discharged through the high-voltage transient switch, and according to E=Pt, the smaller the energy discharge time, the greater the impulse. According to P=mv, the greater the impulse, the faster the speed. T and f are inversely related, so the higher the frequency, the shorter the time. It is known that the electrons in Al metal or other metals move in a directional manner in an electric field, and when the transient high-voltage current flows through the coil diagram, the inside and outside of the metal coil will form a corresponding electromagnetic field. At this time, the aluminum alloy part is in the electromagnetic field range, and the electrons will move in the vector direction of the electromagnetic field. Because the metal has a shielding effect on the electromagnetic field, the magnetic field intensity difference between the inside and outside of the aluminum alloy will form a magnetic field pressure difference, and the pressure difference will be different according to different voltage levels, and the voltage setting range is generally 10-25kv. The speed of Al metal or other metal materials moving in the electromagnetic field is greater than or equal to 280m / s, which quickly approaches the ceramic or other metal matrix. In a very short time of 7-20s, the two materials collide, and the transient high temperature or friction heat formed by the collision will cause the diffusion between metal atoms and non-metal atoms.

[0032] The support end 2 and the receiving end 61 can be fixed with temperature sensing devices or / and optical sensing devices, of course, other corresponding electronic devices can also be installed, which all belong to the protection scope of the utility model, and will not be described in detail here. Compared with the prior art, the design can realize high integration, reduce the occupied space, and facilitate reasonable layout.

[0033] As shown in Fig. 2 As shown in FIG. 8, in the second preferred embodiment of the utility model, a clamping ring 8 is fixed on the inner wall of the support end 2, the clamping ring 8 is located on one side of the receiving pipe 6, the clamping end 81 of the clamping ring 8 has a gap 82 with the support end 2, and the thickness of the gap 82 is equal to the thickness of the horizontal end 63; the other side of the receiving pipe 6 is also provided with a clamping groove 83 opened on the inner wall of the support end 2, the clamping groove 83 is built-in with a sealing ring 84, and the sealing ring 84 always abuts against the horizontal end 63. The clamping ring can position the receiving pipe 6, ensure the accuracy of the assembly position of the receiving pipe 6, in addition, the sealing ring can be placed in the clamping groove 83, seal the receiving pipe 6, avoid the liquid in the liquid storage cavity 7 from leaking out, improve the safety, at the same time, the assembly structure is simple and convenient, convenient to replace and overhaul, greatly improve the work efficiency.

[0034] It should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

[0035] The above series of detailed descriptions are only specific descriptions of the feasible embodiments of the present application, and are not intended to limit the protection scope of the present application. Any equivalent embodiments or changes made without departing from the spirit of the present application should be included in the protection scope of the present application.

Claims

1. Low-inertia ceramic aluminum alloy transmission shaft comprising a shaft tube (1), characterized in that: The shaft tube (1) is an aluminum alloy part, and a hollow cavity (11) is formed through the shaft tube (1) along the axis thereof; the shaft tube (1) has a support end (2) and a transition end (3) and a connecting end (4) arranged in sequence on both sides of the support end (2); the connecting end (4) is fixedly provided with a ceramic sleeve (5); the support end (2) is further provided with a receiving tube (6), and a liquid storage cavity (7) is defined between the receiving tube (6) and the support end (2); the liquid storage cavity (7) is in communication with a liquid outlet (21) formed on the support end (2).

2. The low-inertia, ceramic, aluminum alloy propeller shaft of claim 1, wherein: The included angle between the central axis of the transition end (3) and the horizontal line is 3-6°.

3. The low-inertia, ceramic, aluminum alloy propeller shaft of Claim 1, wherein: The outer circumferential surface of the ceramic sleeve (5) is provided with a threaded groove (51), the connecting end (4) is sleeved on the threaded groove (51), and the two are fixed by magnetic pulse welding.

4. The low-inertia, ceramic, aluminum alloy propeller shaft of claim 1, wherein: The receiving tube (6) comprises an integral receiving end (61), an inclined end (62) and a horizontal end (63), and the horizontal end (63) is fixed on the inner wall of the support end (2) by magnetic pulse welding.

5. The low-inertia, ceramic, aluminum alloy propeller shaft of claim 1, wherein: The central axes of the shaft tube (1), the ceramic sleeve (5) and the receiving tube (6) are coaxial.

6. The low-inertia, ceramic, aluminum alloy propeller shaft of Claim 4, wherein: Temperature sensing devices or / and optical sensing devices can be fixed on the support end (2) and the receiving end (61).

7. The low-inertia, ceramic, aluminum alloy propeller shaft of Claim 4, wherein: A clamping ring (8) is fixed on the inner wall of the support end (2), the clamping ring (8) is located on one side of the receiving tube (6), the clamping end (81) of the clamping ring (8) has a gap (82) with the support end (2), and the thickness of the gap (82) is equal to the thickness of the horizontal end (63); the other side of the receiving tube (6) is further provided with a clamping groove (83) formed on the inner wall of the support end (2), the clamping groove (83) is provided with a sealing ring (84), and the sealing ring (84) is always in abutment with the horizontal end (63).

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