Extrusion-formed INPUT input shaft for automobile and preparation method of extrusion-formed INPUT input shaft

Abstract

The extrusion-formed INPUT input shaft for the automobile comprises a hollow pipe, a pipe expanding structure is integrally formed at one end of the hollow pipe, a connector is integrally formed on the pipe expanding structure, an outer spline is integrally formed on the outer wall of the other end of the hollow pipe, and an inner spline is integrally formed on the outer wall of the other end of the hollow pipe. Spline teeth are integrally formed in the position, located on the outer side of the outer spline, of the end of the hollow pipe, a clamping groove is formed in the connector, a reinforced protective shell is integrally formed on the outer surface of the hollow pipe, and an inner protective piece is integrally formed on the surface of the inner wall of the hollow pipe. According to the extrusion-formed INPUT input shaft for the automobile and the preparation method of the extrusion-formed INPUT input shaft, the hollow pipe cold extrusion forming process is adopted, the product size precision is higher than the precision of a forged product, meanwhile, the product weight is greatly reduced compared with that of solid forging, the cost is also reduced, and meanwhile the productivity efficiency of the cold extrusion process is far higher than that of the forged product.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts, and in particular to an extruded automobile INPUT shaft and a preparation method thereof. Background Art

[0002] The INPUT input shaft is a component in the steering system. It is used in the steering column and is connected to the upper input shaft of the steering wheel and the motor reduction gear. It is used to transmit the steering wheel rotation to the CEPS motor reduction sensor system. It is a physical transmission component. With the continuous development of science and technology, people have higher and higher requirements on the manufacturing process of the INPUT input shaft for automobiles.

[0003] The existing INPUT input shaft for automobiles has certain disadvantages when in use. The traditional CEPS type INPUT input shaft generally adopts a solid forged shaft. The steering shaft mainly plays the following roles: it is connected to the upper input shaft through injection molding or a plastic bushing to play a sliding role, generally meeting a sliding force of 20 to 50N; the end is a special-shaped process, which is mainly connected to the deceleration sensor mechanism of the CEPS motor to ensure torsional stiffness while also detecting the steering angle when turning. The existing products use a solid forging process, and the product weight is too heavy, which increases the weight of the vehicle body and does not conform to the lightweight development trend of new energy vehicles; the spline (6 teeth) on the right side of the forging process product has low forming process accuracy, which is not as high as the cold extrusion forming process accuracy; the production efficiency of the forging process product is low. For this reason, we propose an extruded automotive INPUT input shaft and a preparation method thereof. Summary of the invention

[0004] Technical problem to be solved: In view of the shortcomings of the prior art, the present invention provides an extruded automotive INPUT input shaft and a preparation method thereof. The hollow tube cold extrusion molding process is adopted, and the product size accuracy is higher than that of the forged product. At the same time, the product weight is much lighter than that of the solid forging, which also reduces the cost. At the same time, the production efficiency of the cold extrusion process is much greater than that of the forged product, which can effectively solve the problems in the background technology.

[0005] Technical solution: To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an extruded automotive INPUT input shaft, comprising a hollow tube, one end of the hollow tube is integrally formed with a tube expansion structure, the tube expansion structure is integrally formed with a connector, the other end of the outer wall of the hollow tube is integrally formed with an external spline, the end of the hollow tube is integrally formed with spline teeth at a position outside the external spline, a card slot is provided on the connector, the outer surface of the hollow tube is integrally formed with a reinforced protective shell, and the inner wall surface of the hollow tube is integrally formed with an inner protective sheet.

[0006] As a preferred technical solution of the present application, a shaft sleeve is sleeved on the outer side of the hollow tube at the position of the external spline, and an internal spline is opened on the inner wall of the shaft sleeve at the position corresponding to the external spline.

[0007] As a preferred technical solution of the present application, a positioning frame is positioned on the inner wall of the hollow tube, and a steering monitor is positioned on the inner side of the positioning frame. The steering monitor is provided with a steering sensor, a data transmitter, a remote wireless transmitter, an abnormal sound sensor, a central processing unit, an alarm and a battery. The steering sensor and the abnormal sound sensor are both connected to the data transmitter, the data transmitter is connected to the central processing unit, and the central processing unit is connected to the alarm, the battery and the remote wireless transmitter.

[0008] As a preferred technical solution of the present application, the sleeve is arranged on the outer wall of the hollow tube through internal splines and external splines and slides.

[0009] As a preferred technical solution of the present application, the output ends of the steering sensor and the abnormal sound sensor are electrically connected to the input end of the central processing unit through a data transmitter, remote wireless transmission is performed between the central processing unit and the remote wireless transmitter, and the output end of the central processing unit is electrically connected to the input end of the alarm.

[0010] As a preferred technical solution of the present application, the hollow tube and the external spline are integrally formed by spline mold processing and adopt a cold extrusion molding method.

[0011] As a preferred technical solution of the present application, the hollow tube and the tube expansion structure are integrally formed by a flaring mechanism, and the tube expansion structure and the connector are integrally formed by machining.

[0012] A method for preparing an extruded automotive INPUT shaft comprises the following steps:

[0013] S1: Pipe processing: Select hollow pipes, process the inner and outer surfaces of the hollow pipes, integrate the composite reinforcement structure, increase the strength of the pipes, and install the steering monitoring mechanism inside;

[0014] S2: Expanding: Place the prepared hollow pipe into the processing position of the pipe expanding mechanism for positioning, and expand the left end of the pipe;

[0015] S3: Spline forming: After the expansion is completed, the pipe is placed in the designated processing position of the spline mold, and the right end of the pipe is spline formed by cold extrusion;

[0016] S4: right end machining: the pipe after spline forming continues to be processed, and the right end of the pipe is machined;

[0017] S5: Left end machining: After the right end is machined, the left end of the pipe is machined and formed, and heat treated at the same time until the final shape is achieved.

[0018] Beneficial effects: Compared with the prior art, the present invention provides an extruded automotive INPUT input shaft and a preparation method thereof, which have the following beneficial effects: the extruded automotive INPUT input shaft and a preparation method thereof adopt a hollow tube cold extrusion forming process, and the product size accuracy is higher than that of a forged product, and the product weight is much lighter than that of a solid forged product, which also reduces the cost. At the same time, the production efficiency of the cold extrusion process is much greater than that of a forged product. A hollow tube is selected, and the inner and outer surfaces of the hollow tube are processed, and an integrated composite reinforcement structure is formed to increase the use strength of the tube. At the same time, a steering monitoring mechanism is installed inside; the manufactured hollow tube is placed in the processing position of the tube expansion mechanism for positioning, and the left end of the tube is expanded; after the expansion is completed, The pipe is placed in the designated processing position of the spline die, and the right end of the pipe is spline-formed by cold extrusion; the pipe after spline forming continues to be processed, and the right end of the pipe is machined; after the right end is machined, the left end of the pipe is machined, and heat treatment is performed at the same time until it is finally formed. The hollow tube cold extrusion forming process is adopted, and the product size accuracy is higher than that of the forged product. At the same time, the product weight is much lighter than that of the solid forging, and the cost is also reduced. At the same time, the production capacity efficiency of the cold extrusion process is much greater than that of the forged product, which reduces weight, reduces costs, increases production capacity, improves production efficiency, and improves product accuracy. The entire automotive INPUT input shaft has a simple structure, is easy to operate, and has a better effect than the traditional method. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is an overall structural schematic diagram of an extruded automobile INPUT shaft and a preparation method thereof.

[0020] Figure 2 The present invention is an extruded automobile INPUT input shaft and a preparation method thereof. The present invention is a schematic structural diagram of the second embodiment of the present invention.

[0021] Figure 3 The present invention is an extruded automobile INPUT input shaft and a preparation method thereof.

[0022] Figure 4 The present invention is an extruded automobile INPUT input shaft and a preparation method thereof.

[0023] Figure 5 The present invention is an extruded automobile INPUT shaft and a preparation method thereof. The present invention is a schematic diagram of the structure inside the hollow tube.

[0024] Figure 6 The present invention is an extruded automobile INPUT shaft and a structural schematic diagram of a steering monitor in a preparation method thereof.

[0025] Figure 7 The present invention is an extruded automotive INPUT shaft and a schematic structural diagram of step S1 in a method for preparing the same.

[0026] Figure 8 This is a schematic structural diagram of an extruded automotive INPUT input shaft and a preparation method thereof in step S2 of the present invention.

[0027] Fig. 9 The present invention is an extruded automobile INPUT shaft and a schematic structural diagram of step S3 in a preparation method thereof.

[0028] Fig.10 The present invention is an extruded automobile INPUT shaft and a schematic structural diagram of step S4 in a preparation method thereof.

[0029] Fig.11 The present invention is an extruded automobile INPUT shaft and a schematic structural diagram of step S5 in a preparation method thereof.

[0030] In the figure: 1. Hollow pipe; 2. Reinforced protective shell; 3. Connector; 4. Internal spline; 5. Bushing; 6. External spline; 7. Spline teeth; 8. Slot; 9. Internal protective sheet; 10. Expanded tube structure; 11. Steering monitor; 12. Steering sensor; 13. Data transmitter; 14. Long-range wireless transmitter; 15. Abnormal sound sensor; 16. Central processing unit; 17. Alarm; 18. Battery; 19. Positioning frame. DETAILED DESCRIPTION

[0031] The technical scheme of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments, but it will be understood by those skilled in the art that the following described embodiments are part of embodiments of the present invention, rather than all embodiments, and are only used to illustrate the present invention, and should not be considered as limiting the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present invention. If specific conditions are not specified in the embodiments, they are carried out according to normal conditions or conditions recommended by the manufacturer. If the manufacturer is not specified in the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] like Figure 1-11 As shown, an extruded automobile INPUT input shaft comprises a hollow tube 1, one end of the hollow tube 1 is integrally formed with a tube expansion structure 10, the tube expansion structure 10 is integrally formed with a connector 3, the other end of the hollow tube 1 is integrally formed with an external spline 6 on the outer wall, the end of the hollow tube 1 is integrally formed with a spline tooth 7 at the position outside the external spline 6, a slot 8 is provided on the connector 3, the outer surface of the hollow tube 1 is integrally formed with a reinforced protective shell 2, the inner wall surface of the hollow tube 1 is integrally formed with an inner protective sheet 9, and the hollow tube cold extrusion molding process is adopted, the product size accuracy is higher than that of the forged product, and the product weight is much lighter than that of the solid forging, which also reduces the cost, and the production efficiency of the cold extrusion process is much greater than that of the forged product.

[0035] Furthermore, a shaft sleeve 5 is sleeved on the outer side of the hollow tube 1 at the position of the external spline 6 , and an internal spline 4 is formed on the inner wall of the shaft sleeve 5 at the position corresponding to the external spline 6 .

[0036] Furthermore, a positioning frame 19 is positioned on the inner wall of the hollow tube 1, and a steering monitor 11 is positioned on the inner side of the positioning frame 19. The steering monitor 11 is provided with a steering sensor 12, a data transmitter 13, a remote wireless transmitter 14, an abnormal sound sensor 15, a central processing unit 16, an alarm 17 and a battery 18. The steering sensor 12 and the abnormal sound sensor 15 are both connected to the data transmitter 13, the data transmitter 13 is connected to the central processing unit 16, and the central processing unit 16 is connected to the alarm 17, the battery 18 and the remote wireless transmitter 14.

[0037] Furthermore, the sleeve 5 is sleeved on the outer wall of the hollow tube 1 through the inner spline 4 and the outer spline 6 and slides.

[0038] Furthermore, the output ends of the steering sensor 12 and the abnormal sound sensor 15 are electrically connected to the input end of the central processing unit 16 through the data transmitter 13, and remote wireless transmission is performed between the central processing unit 16 and the remote wireless transmitter 14, and the output end of the central processing unit 16 is electrically connected to the input end of the alarm 17.

[0039] Furthermore, the hollow tube 1 and the external spline 6 are integrally formed by spline die processing, and a cold extrusion molding method is adopted.

[0040] Furthermore, the hollow tube 1 and the tube expansion structure 10 are integrally formed by means of an expansion mechanism, and the tube expansion structure 10 and the connector 3 are integrally formed by means of machining.

[0041] A method for preparing an extruded automotive INPUT shaft comprises the following steps:

[0042] S1: Pipe processing: Select hollow pipes, process the inner and outer surfaces of the hollow pipes, integrate the composite reinforcement structure, increase the strength of the pipes, and install the steering monitoring mechanism inside;

[0043] S2: Expanding: Place the prepared hollow pipe into the processing position of the pipe expanding mechanism for positioning, and expand the left end of the pipe;

[0044] S3: Spline forming: After the expansion is completed, the pipe is placed in the designated processing position of the spline mold, and the right end of the pipe is spline formed by cold extrusion;

[0045] S4: right end machining: the pipe after spline forming continues to be processed, and the right end of the pipe is machined;

[0046] S5: Left end machining: After the right end is machined, the left end of the pipe is machined and formed, and heat treated at the same time until the final shape is achieved.

[0047] Working principle: The present invention comprises a hollow tube 1, a reinforced protective shell 2, a connector 3, an inner spline 4, a shaft sleeve 5, an outer spline 6, a spline tooth 7, a slot 8, an inner protective sheet 9, a tube expansion structure 10, a steering monitor 11, a steering sensor 12, a data transmitter 13, a remote wireless transmitter 14, an abnormal sound sensor 15, a central processing unit 16, an alarm 17, a battery 18, and a positioning frame 19. The hollow tube cold extrusion molding process is adopted, and the product size accuracy is higher than that of the forged product. At the same time, the product weight is much lighter than that of the solid forging, which also reduces the cost. At the same time, the production efficiency of the cold extrusion process is much greater than that of the forged product. Select hollow pipes, process the inner and outer surfaces of the hollow pipes, integrate the composite reinforcement structure, increase the strength of the pipes, and install a steering monitoring mechanism inside; place the manufactured hollow pipes into the processing position of the pipe expansion mechanism for positioning, and expand the left end of the pipes; the expanded pipes are placed in the designated processing position of the spline mold, and the right end of the pipes is spline-formed by cold extrusion; the spline-formed pipes continue to be processed, and the right end of the pipes is machined; after the right end is machined, the left end of the pipes is machined, and heat treatment is performed at the same time until the final forming.

[0048] It should be noted that, in this article, relational terms such as first and second (number one, number two), etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0049] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. An extruded automobile INPUT shaft, comprising a hollow tube (1), characterized in that: One end of the hollow tube (1) is integrally formed with a tube expansion structure (10), and a connector (3) is integrally formed on the tube expansion structure (10); the other end of the outer wall of the hollow tube (1) is integrally formed with an external spline (6); the end of the hollow tube (1) is integrally formed with a spline tooth (7) at a position outside the external spline (6); a slot (8) is provided on the connector (3); the outer surface of the hollow tube (1) is integrally formed with a reinforced protective shell (2), and the inner wall surface of the hollow tube (1) is integrally formed with an inner protective sheet (9).

2. The extruded automotive INPUT shaft according to claim 1, characterized in that: The outer side of the hollow tube (1) is sleeved with a shaft sleeve (5) at the position of the external spline (6), and the inner wall of the shaft sleeve (5) is provided with an internal spline (4) at the position corresponding to the external spline (6).

3. The extruded automotive INPUT shaft according to claim 1, characterized in that: A positioning frame (19) is positioned on the inner wall of the hollow tube (1), and a steering monitor (11) is positioned on the inner side of the positioning frame (19). The steering monitor (11) is provided with a steering sensor (12), a data transmitter (13), a remote wireless transmitter (14), an abnormal sound sensor (15), a central processing unit (16), an alarm (17) and a battery (18). The steering sensor (12) and the abnormal sound sensor (15) are both connected to the data transmitter (13), the data transmitter (13) is connected to the central processing unit (16), and the central processing unit (16) is connected to the alarm (17), the battery (18) and the remote wireless transmitter (14).

4. The extruded automotive INPUT shaft according to claim 2, characterized in that: The shaft sleeve (5) is sleeved on the outer wall of the hollow tube (1) via an inner spline (4) and an outer spline (6) and is slidably movable.

5. The extruded automotive INPUT shaft according to claim 3, characterized in that: The output ends of the steering sensor (12) and the abnormal sound sensor (15) are electrically connected to the input end of the central processing unit (16) through the data transmitter (13); remote wireless transmission is performed between the central processing unit (16) and the remote wireless transmitter (14); and the output end of the central processing unit (16) is electrically connected to the input end of the alarm (17).

6. The extruded automotive INPUT shaft according to claim 1, characterized in that: The hollow tube (1) and the external spline (6) are integrally formed by spline die processing and are formed by cold extrusion.

7. The extruded automotive INPUT shaft according to claim 1, characterized in that: The hollow tube (1) and the tube expansion structure (10) are integrally formed by processing with an expansion mechanism, and the tube expansion structure (10) and the connector (3) are integrally formed by machining.

8. A method for preparing an extruded automotive INPUT shaft, characterized in that: The steps include: S1: Pipe processing: Select hollow pipes, process the inner and outer surfaces of the hollow pipes, integrate the composite reinforcement structure, increase the strength of the pipes, and install the steering monitoring mechanism inside; S2: Expanding: Place the prepared hollow pipe into the processing position of the pipe expanding mechanism for positioning, and expand the left end of the pipe; S3: Spline forming: After the expansion is completed, the pipe is placed in the designated processing position of the spline mold, and the right end of the pipe is spline formed by cold extrusion; S4: right end machining: the pipe after spline forming continues to be processed, and the right end of the pipe is machined; S5: Left end machining: After the right end is machined, the left end of the pipe is machined and formed, and heat treated at the same time until the final shape is achieved.

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