Driving shaft with composite time sequence

Abstract

The invention relates to a composite time sequence driving shaft. A plurality of track grooves are sequentially formed in the composite time sequence driving shaft. The track grooves are sequentially arranged in the axial direction of the driving shaft of the composite time sequence. Each track groove is arranged along the circumferential direction of the driving shaft of the composite time sequence; each track groove comprises a first bending part and a second bending part; the first bending part and the second bending part are connected through a straight part; the starting point of the first bending part of each track groove sequentially shifts towards the starting point of the corresponding second bending part; and the starting points of the second bending parts of the track grooves are correspondingly arranged. Compared with the prior art, the multiple track grooves are formed in the driving shaft of the composite timing sequence, each track groove corresponds to one shifting rod, each shifting rod can be provided with the multiple blades, driving of a single driving piece can be achieved, synchronous opening can be achieved, composite timing sequence opening of multiple sets of blades can be achieved through the single driving shaft, bionic movement is achieved, and the bionic effect is achieved. The action of unfolding wings of birds is simulated.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts, and in particular to a composite timing drive shaft. Background Art

[0002] To ensure the normal operation of the automobile engine, an active grille (AGS) is usually installed at the front of the car to allow air to enter the engine compartment, thereby taking away the heat generated by the engine compartment in time. The active grille is a mechanism that reduces wind resistance by reducing or even completely closing the grille opening under certain working conditions. Through the integrated active grille control module, the active grille is closed at high vehicle speeds and low cooling requirements to reduce wind resistance and improve fuel economy or electric vehicle range; the active grille is opened when the cooling demand is high to meet the heat dissipation requirements of the automobile cooling module.

[0003] The existing AGS in the market basically opens conventionally, either horizontally or vertically. With the development of intelligence, the active air intake grille needs a structural setting that can achieve a welcoming effect to meet the human-computer interaction of future smart cars; but the current status of AGS has the following shortcomings: 1. To achieve sequential opening, multiple motors are required, and the manufacturing cost is high; 2. There is no sequential opening movement method, most of them are synchronous opening mechanisms, and bionic movement cannot be achieved; 3. Multiple drive shafts are used to open multiple sets of blades, the number of parts is large, and the manufacturing feasibility is low.

[0004] Therefore, a drive shaft with a composite timing that can be used in AGS is needed to solve the above technical problems. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to propose a compound timing drive shaft. The compound timing drive shaft is provided with multiple track grooves, each track groove corresponds to a lever, and multiple blades can be provided on each lever. It can be driven by a single drive component to achieve bionic movement, bionic the action of birds (such as swans) spreading their wings), and can open multiple groups of blades through a single drive shaft.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] The present invention provides a driving shaft of a compound timing, on which a plurality of track grooves are arranged in sequence; the plurality of track grooves are arranged in sequence along the axial direction of the driving shaft of the compound timing; each track groove is arranged along the circumferential direction of the driving shaft of the compound timing; each track groove includes a first bending portion and a second bending portion; the first bending portion and the second bending portion are connected by a straight portion; the first bending portion and the second bending portion are both trapezoidal grooves; the first bending portion and the second bending portion both include a starting point, a first middle point, a second middle point, and an ending point which are arranged in sequence; the starting point of the first bending portion of each track groove is offset toward the starting point of the corresponding second bending portion in sequence; the starting point of the second bending portion of each track groove is arranged correspondingly.

[0008] Furthermore, the composite timing driving shaft comprises a driving shaft body and a connecting end arranged at one end of the driving shaft body; the track groove is arranged on the driving shaft body.

[0009] Furthermore, the driving shaft body is a cylinder.

[0010] Furthermore, the compound timing drive shaft can be used for the active air intake grille to realize compound timing drive; the active air intake grille includes a compound timing drive shaft, a drive member, a drive rod, a lever, a connecting block, and blades.

[0011] Furthermore, the connecting end of the driving shaft of the composite timing is connected to the driving member; each track groove is connected to the driving rod; the driving rod is connected to the shifting rod through a connecting block; and the shifting rod is connected to a blade.

[0012] Furthermore, the driving member is a motor; the output shaft of the motor is connected to the driving shaft to drive the driving shaft.

[0013] Furthermore, the connection end of the composite timing driving shaft is movably connected to the output shaft of the motor.

[0014] Furthermore, the two compound-timing drive shafts can be connected to the two sides of the output shaft of the motor through the connecting ends respectively, so as to realize a single motor driving a double-sided compound-timing drive shaft.

[0015] Furthermore, each track groove is connected to a driving rod, and each driving rod is connected to a shifting rod; each shifting rod is provided with a plurality of blades.

[0016] Furthermore, a plurality of blade connecting keys are arranged in parallel on the lever; the blades are connected to the blade connecting keys in a one-to-one correspondence, and a single lever is used to drive a plurality of blades, thereby ensuring the synchronization of blades in a single row; the blades are connected to the blade connecting key shafts.

[0017] Furthermore, the driving rod is slidably connected to the track groove.

[0018] Furthermore, in the first bending portion and the second bending portion, the groove between the first midpoint and the second midpoint is parallel to the straight portion; in the first bending portion and the second bending portion, the groove between the starting point and the first midpoint is inclined relative to the straight portion; in the first bending portion and the second bending portion, the groove between the second midpoint and the ending point is inclined relative to the straight portion.

[0019] Furthermore, in the first bending portion and the second bending portion, the groove between the starting point and the first midpoint and the groove between the second midpoint and the ending point are symmetrically arranged about the high line of the side surface of the drive shaft, that is, the first bending portion and the second bending portion are both isosceles trapezoidal grooves.

[0020] Furthermore, the driving shaft is provided with 9 track grooves.

[0021] Furthermore, each of the nine track grooves is connected to a driving rod, and each driving rod is connected to a shifting rod; each shifting rod is provided with a plurality of blades.

[0022] Furthermore, each blade on a single lever forms a separate rotating system.

[0023] Furthermore, the blades are rhombus-shaped blades (diamond pieces).

[0024] Furthermore, through the driving shaft of the composite timing, the movement of the blades can be controlled as follows: timing start → shaking → synchronous start, the timing start is that each column of blades is turned on in sequence, and the synchronous start is that each column of blades is turned on at the same time.

[0025] Further preferably, for the first bending portion of three adjacent track grooves, the first midpoint of the first track groove among the three adjacent track grooves is set correspondingly to the starting point of the second track groove (set on the same high line on the side surface of the cylinder); the second midpoint of the first track groove among the three adjacent track grooves, the first midpoint of the second track groove, and the starting point of the third track groove are set correspondingly (set on the same high line on the side surface of the cylinder); the ending point of the first track groove among the three adjacent track grooves, the second midpoint of the second track groove, and the first midpoint of the third track groove are set correspondingly (set on the same high line on the side surface of the cylinder); the second midpoint of the second track groove among the three adjacent track grooves is set correspondingly to the first midpoint of the third track groove (set on the same high line on the side surface of the cylinder); the ending point of the second track groove among the three adjacent track grooves is set correspondingly to the second midpoint of the third track groove (set on the same high line on the side surface of the cylinder). Under this setting, the sequential opening of the blades can be achieved as follows: A. After the first column is fully open, the second column turns from fully closed to fully open; while the first column is in the process of changing from fully open to fully closed, the third column is in the process of changing from fully closed to fully open, but the second column is in the fully open position; B. While the second column is in the process of changing from fully open to fully closed, the fourth column is in the process of changing from fully closed to fully open, and the third column is in the fully open position; when starting to open from the third column: C. There is always one column in the process of being fully open; D. There is always one column in the process of changing from fully open to fully closed; E. There is always one column in the process of changing from fully closed to fully open; H. There are always two columns in motion.

[0026] Furthermore, the second bending portions of each track groove have the same shape.

[0027] Furthermore, the first bending portions of each track groove have the same shape.

[0028] Furthermore, in the first bending portion and the second bending portion, the groove between the starting point and the first intermediate point is the blade opening trajectory, the groove between the first intermediate point and the second intermediate point is the blade pause trajectory, and the groove between the second intermediate point and the end point is the blade closing trajectory.

[0029] Furthermore, the straight portion is an idling stroke trajectory.

[0030] Furthermore, when the driving rod slides within the blade opening trajectory, the blades on the lever connected thereto open; when the driving rod slides within the blade pausing trajectory, the blades on the lever connected thereto pause moving; when the driving rod slides within the blade closing trajectory, the blades on the lever connected thereto close; when the driving rod slides within the idling stroke trajectory, the blades on the lever connected thereto pause moving.

[0031] Furthermore, the output shaft of the motor rotates around the Y direction, and the rotation direction is converted into the Z direction rotation of the blade through the connection end → the driving shaft of the compound timing → the driving rod → the lever → the blade, wherein the driving shaft of the compound timing, the connecting block, the blade, and the lever form a four-bar structure.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1) The compound timing drive shaft of the present invention is provided with a plurality of track grooves, each track groove corresponds to a lever, and a plurality of blades can be provided on each lever, so that a single driving member can be driven, and not only can the blades be opened synchronously, but also a plurality of groups of blades can be opened in compound timing through a single driving shaft, thereby realizing bionic motion (the bionic motion refers to the bionic motion of birds (such as swans) spreading their wings).

[0034] 2) The composite timing drive shaft of the present invention only needs one drive member to control the different movements of multiple groups of levers and blades, thereby realizing composite timing opening and having low manufacturing cost.

[0035] 3) The composite timing drive shaft of the present invention cooperates with the drive member, drive rod, blades and lever. The active air intake grille using the composite timing drive shaft can realize the blade timing opening → shaking → synchronous opening, thereby realizing bionic movement, compared with the conventional active air intake grille. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the structure of the composite timing drive shaft and the track groove of the embodiment 1 of the present invention.

[0037] Figure 2 for Figure 1 A partial enlarged view of point a in the middle.

[0038] Figure 3 for Figure 1 A partial enlarged view of point b in the middle.

[0039] Figure 4 It is a schematic diagram of the track of a single track groove of the composite timing drive shaft of Example 1 of the present invention.

[0040] Figure 5 It is a schematic structural diagram of the driving shaft and driving member of the composite timing of Example 1 of the present invention.

[0041] Figure 6 It is a schematic structural diagram of a composite timing driving shaft and a component to be driven according to Example 1 of the present invention.

[0042] Figure 7 It is a schematic structural diagram of the composite timing driving shaft, driving member and components to be driven of Example 1 of the present invention.

[0043] Figure 8 This is a driving schematic diagram of the composite timing driving shaft, driving member and component to be driven of Example 1 of the present invention.

[0044] Fig. 9 It is an exploded view of the driving shaft, driving member and components to be driven of the composite timing of Example 1 of the present invention.

[0045] Fig.10 It is a schematic diagram of the four-bar linkage structure of the compound timing drive shaft of Example 1 of the present invention.

[0046] Fig.11 Schematic diagram of the driving of the four-bar structure of the composite timing drive shaft of Example 1 of the present invention.

[0047] Description of reference numerals:

[0048] 1. Compound timing driving shaft; 11. Track groove; 111. First bending portion; 112. Second bending portion; 113. Straight portion; 114. Starting point; 115. First intermediate point; 116. Second intermediate point; 117. End point; 12. Driving shaft body; 13. Connecting end; 2. Driving member; 3. Driving rod; 4. Push rod; 5. Connecting block; 6. Blade.

[0049] A. First round opening and closing; B. Idle stroke; C. Second round opening and closing; D. Driving trajectory of a single row of blades; E. Sequential opening; F. Jitter; G. Synchronous opening; H. Blade opening trajectory; I. Blade pause trajectory; J. Blade closing trajectory; K. Starting point of the previous row opening; L. Starting point of the next row opening; M. Timing difference between the opening of two adjacent rows. DETAILED DESCRIPTION

[0050] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, without departing from the concept of the present invention, several changes and improvements in the shape of the openings can also be made. These all belong to the protection scope of the present invention.

[0051] Any features such as preparation methods, materials, structures or composition ratios that are not clearly described in this technical solution shall be deemed as common technical features disclosed in the prior art.

[0052] Example 1

[0053] like Figure 1-11As shown, this embodiment provides a composite timing drive shaft, on which a plurality of track grooves 11 are sequentially arranged; the plurality of track grooves 11 are sequentially arranged along the axial direction of the composite timing drive shaft 1; each track groove 11 is arranged along the circumferential direction of the composite timing drive shaft 1; each track groove 11 includes a first bending portion 111 and a second bending portion 112; the first bending portion 111 and the second bending portion 112 are connected by a straight portion 113; the first bending portion 111 and the second bending portion 112 are both trapezoidal grooves; the first bending portion 111 and the second bending portion 112 each include a starting point 114, a first intermediate point 115, a second intermediate point 116, and an end point 117 which are sequentially arranged; the starting point 114 of the first bending portion 111 of each track groove 11 is sequentially offset to the starting point 114 of the corresponding second bending portion 112; the starting point 114 of the second bending portion 112 of each track groove 11 is correspondingly arranged on the same high line on the side surface of the cylinder.

[0054] The composite timing driving shaft 1 comprises a driving shaft body 12 and a connecting end 13 arranged at one end of the driving shaft body 12 ; the track groove 11 is arranged on the driving shaft body 12 .

[0055] The compound timing drive shaft 1 can be used for an active air intake grille to realize compound timing drive; the active air intake grille comprises a compound timing drive shaft 1, a drive member 2, a drive rod 3, a lever 4, a connecting block 5, and a blade 6.

[0056] The connecting end 13 of the composite timing driving shaft 1 is connected to the driving member 2; each track groove 11 is connected to the driving rod 3; the driving rod 3 is connected to the lever 4 through the connecting block 5; the lever 4 is connected to the blade 6. The driven component includes the driving rod 3, the lever 4, the connecting block 5, and the blade 6.

[0057] The driving member 2 is a motor; the output shaft of the motor is connected to the driving shaft to drive the driving shaft.

[0058] The connection end 13 of the composite timing driving shaft 1 is movably connected to the output shaft of the motor.

[0059] The two compound-timing drive shafts 1 can be connected to the two sides of the output shaft of the motor through the connecting ends 13 respectively, so as to realize a single motor driving the double-sided compound-timing drive shaft 1 .

[0060] Each track groove 11 is connected to a driving rod 3 , and each driving rod 3 is connected to a shifting rod 4 ; each shifting rod 4 is provided with a plurality of blades 6 .

[0061] The lever 4 is provided with a plurality of blade 6 connecting keys in parallel; the blades 6 are connected to the blade 6 connecting keys in a one-to-one correspondence, and a single lever 4 is used to drive a plurality of blades 6, so as to ensure the synchronization of the blades 6 in a single row; the blades 6 are connected to the blade 6 connecting key shafts.

[0062] The driving rod 3 is slidably connected to the track groove 11 .

[0063] In the first bending portion 111 and the second bending portion 112, the groove between the first midpoint 115 and the second midpoint 116 is parallel to the straight portion 113; in the first bending portion 111 and the second bending portion 112, the groove between the starting point 114 and the first midpoint 115 is inclined relative to the straight portion 113; in the first bending portion 111 and the second bending portion 112, the groove between the second midpoint 116 and the ending point 117 is inclined relative to the straight portion 113.

[0064] In the first bending portion 111 and the second bending portion 112, the groove between the starting point 114 and the first intermediate point 115 and the groove between the second intermediate point 116 and the ending point 117 are symmetrically arranged about the high line of the side surface of the driving shaft, that is, the first bending portion 111 and the second bending portion 112 are both isosceles trapezoidal grooves.

[0065] The driving shaft is provided with 9 track grooves 11 .

[0066] The nine track grooves 11 are each connected to a driving rod 3 , and each driving rod 3 is connected to a shifting rod 4 ; each shifting rod 4 is provided with a plurality of blades 6 .

[0067] Each blade 6 on a single lever 4 forms a separate rotating system.

[0068] The blades 6 are rhombus-shaped blades 6 (diamond pieces).

[0069] Through the composite timing drive shaft 1, the movement of the blades 6 can be controlled as follows: timing start → shaking → synchronous start, timing start means that each column of blades 6 is turned on in sequence, and synchronous start means that each column of blades 6 is turned on at the same time. After all blades 6 are turned on sequentially, they pause for a few seconds and then turn on synchronously. This pause period is regarded as shaking. The second bending portion 112 of each track groove 11 has the same shape.

[0070] The first bent portions 111 of the track grooves 11 have the same shape.

[0071] In the first bending portion 111 and the second bending portion 112, the groove between the starting point 114 and the first intermediate point 115 is the blade opening trajectory, the groove between the first intermediate point 115 and the second intermediate point 116 is the blade pause trajectory, and the groove between the second intermediate point 116 and the end point 117 is the blade closing trajectory.

[0072] The straight portion 113 is an idling stroke trajectory.

[0073] When the driving rod 3 slides in the blade opening track, the blade 6 on the lever 4 connected thereto opens; when the driving rod 3 slides in the blade pausing track, the blade 6 on the lever 4 connected thereto pauses; when the driving rod 3 slides in the blade closing track, the blade 6 on the lever 4 connected thereto closes; when the driving rod 3 slides in the idling stroke track, the blade 6 on the lever 4 connected thereto pauses.

[0074] The output shaft of the motor rotates around the Y direction, and the rotation direction is converted into the Z direction rotation of the blade 6 through the connection end 13 → the compound timing drive shaft 1 → the drive rod 3 → the lever 4 → the blade 6, wherein the compound timing drive shaft 1, the connecting block 5, the blade 6, and the lever 4 form a four-bar structure.

[0075] The motor output shaft rotates around the Y direction, driving the compound timing drive shaft 1 to rotate, and then drives the lever 4 through the drive rod 3 to drive the blade 6, so that the blade 6 rotates in the Z direction, that is, the motor output shaft rotates around the Y direction, and drives in sequence: → compound timing drive shaft 1 → drive rod 3 → lever 4 → blade 6, converting the rotation direction into the Z direction rotation of blade 6, wherein the compound timing drive shaft 1, connecting block 5, blade 6, and lever 4 form a four-bar structure, and w, x, y, and z are connection points respectively.

[0076] In summary, the mechanical transmission path of a single row of blades 6 is: the motor 6 rotates, the motor 6 drives the motor output shaft to rotate, the motor output shaft drives the compound timing drive shaft 1 to rotate, the compound timing drive shaft 1 drives the drive rod 3 to rotate, the drive rod 3 drives the lever 4 to rotate, and the lever 4 drives the blades 6 to rotate; the opening order of the blades 6 in other columns is based on the different arrangement positions of the tracks (there are multiple tracks on the compound timing drive shaft 1, and each track corresponds to the rotating blades 6 in each column) and is opened according to the different rotation angles of the compound timing drive shaft 1.

[0077] Example 2

[0078] This embodiment provides a composite timing drive shaft, which is improved on the basis of the first embodiment.

[0079] Compared with the first embodiment, for the first bending portions 111 of the three adjacent track grooves 11, the first middle point 115 of the first bending portion 111 of the first track groove 11 among the three adjacent track grooves 11 is correspondingly arranged with the starting point 114 of the first bending portion 111 of the second track groove 11 (arranged on the same high line on the side surface of the cylinder); the second middle point 116 of the first bending portion 111 of the first track groove 11 among the three adjacent track grooves 11, the first middle point 115 of the first bending portion 111 of the second track groove 11 and the starting point 114 of the first bending portion 111 of the third track groove 11 are correspondingly arranged (arranged on the same high line on the side surface of the cylinder); the first track of the first bending portion 111 of the three adjacent track grooves 11 The end point 117 of the groove 11, the second middle point 116 of the first bending portion 111 of the second track groove 11 and the first middle point 115 of the first bending portion 111 of the third track groove 11 are correspondingly arranged (arranged on the same high line of the side surface of the cylinder); the second middle point 116 of the first bending portion 111 of the second track groove 11 among the three adjacent track grooves 11 and the first middle point 115 of the first bending portion 111 of the third track groove 11 are correspondingly arranged on the same high line of the side surface of the cylinder; the end point 117 of the first bending portion 111 of the second track groove 11 among the three adjacent track grooves 11 and the second middle point 116 of the first bending portion 111 of the third track groove 11 are correspondingly arranged (arranged on the same high line of the side surface of the cylinder). Under this setting, the sequential opening of blades 6 can be achieved as follows: A. After the first column is fully opened, the second column turns from fully closed to fully open; while the first column is in the process of changing from fully open to fully closed, the third column is in the process of changing from fully closed to fully open, but the second column is in the fully open position; B. While the second column is in the process of changing from fully open to fully closed, the fourth column is in the process of changing from fully closed to fully open, and the third column is in the fully open position; when starting to open from the third column: C. There is always one column in the process of being fully open; D. There is always one column in the process of changing from fully open to fully closed; E. There is always one column in the process of changing from fully closed to fully open; H. There are always two columns in motion.

[0080] That is, the movement of the blade 6 can be as follows: sequential opening → shaking → synchronous opening. Sequential opening is the above-mentioned sequential opening mode. After all blades 6 are sequentially opened, they pause for a few seconds and then synchronously open. This pause period is regarded as shaking. Among them, synchronous opening means that all blades 6 rotate at the same time.

[0081] The embodiments of the present invention are described to facilitate those skilled in the art to understand and use the present invention. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims

1. A composite timing drive shaft, characterized in that: A plurality of track grooves (11) are sequentially arranged on the composite timing driving shaft (1); The multiple track grooves (11) are arranged in sequence along the axial direction of the composite timing driving shaft (1); Each track groove (11) is arranged along the circumference of the driving shaft (1) of the composite timing; Each track groove (11) comprises a first bending portion (111) and a second bending portion (112); The first bent portion (111) and the second bent portion (112) are connected via a straight portion (113); The first bending portion (111) and the second bending portion (112) are both trapezoidal grooves; The first bending portion (111) and the second bending portion (112) both include a starting point (114), a first middle point (115), a second middle point (116), and an end point (117) which are arranged in sequence; The starting point (114) of the first bending portion (111) of each track groove (11) is offset in sequence toward the starting point (114) of the corresponding second bending portion (112); The starting point (114) of the second bending portion (112) of each track groove (11) is set accordingly.

2. A composite timing drive shaft according to claim 1, characterized in that: The composite timing drive shaft (1) comprises a drive shaft body (12) and a connecting end (13) arranged at one end of the drive shaft body (12); The track groove (11) is arranged on the driving shaft body (12).

3. A composite timing drive shaft according to claim 2, characterized in that: The composite timing drive shaft (1) is used for an active air intake grille; The active air intake grille comprises a composite timing drive shaft (1), a drive member (2), a drive rod (3), a lever (4), a connecting block (5), and blades (6); The connection end (13) of the composite timing drive shaft (1) is connected to the drive member (2); Each track groove (11) is connected to the driving rod (3); The driving rod (3) and the shifting rod (4) are connected via a connecting block (5); The lever (4) is connected with a blade (6).

4. A composite timing drive shaft according to claim 3, characterized in that: The driving rod (3) is slidably connected to the track groove (11).

5. The composite timing drive shaft according to claim 1, characterized in that: In the first bending portion (111) and the second bending portion (112), the groove between the first middle point (115) and the second middle point (116) is parallel to the straight portion (113); In the first bending portion (111) and the second bending portion (112), the groove between the starting point (114) and the first intermediate point (115) is arranged obliquely relative to the straight portion (113); in the first bending portion (111) and the second bending portion (112), the groove between the second intermediate point (116) and the end point (117) is arranged obliquely relative to the straight portion (113).

6. A composite timing drive shaft according to claim 5, characterized in that: In the first bending portion (111) and the second bending portion (112), the groove between the starting point (114) and the first intermediate point (115) and the groove between the second intermediate point (116) and the end point (117) are symmetrically arranged about the high line of the side surface of the drive shaft.

7. A composite timing drive shaft according to claim 1, characterized in that: The driving shaft is provided with 9 track grooves (11).

8. The composite timing drive shaft according to claim 1, characterized in that: For the first bending portion (111) of the three adjacent track grooves (11), the first middle point (115) of the first track groove (11) of the three adjacent track grooves (11) and the starting point (114) of the second track groove (11) are arranged correspondingly; the second middle point (116) of the first track groove (11) of the three adjacent track grooves (11), the first middle point (115) of the second track groove (11) and the starting point (114) of the third track groove (11) are arranged correspondingly; the first track groove (11) of the three adjacent track grooves (11) The end point (117) of the groove (11), the second middle point (116) of the second track groove (11) and the first middle point (115) of the third track groove (11) are arranged correspondingly; the second middle point (116) of the second track groove (11) among the three adjacent track grooves (11) and the first middle point (115) of the third track groove (11) are arranged correspondingly; the end point (117) of the second track groove (11) among the three adjacent track grooves (11) and the second middle point (116) of the third track groove (11) are arranged correspondingly.

9. The composite timing drive shaft according to claim 1, characterized in that: The second bending portions (112) of each track groove (11) have the same shape.

10. The composite timing drive shaft according to claim 1, characterized in that: The first bending portions (111) of the track grooves (11) have the same shape.

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