Double-end coil spring driving shaft lever

Abstract

The utility model discloses a double-end coil spring driving shaft lever, which relates to the related technical field of a recovery system of an automobile sunshade curtain and comprises an aluminum pipe, coil spring bodies are symmetrically arranged on two sides of the inner wall of the aluminum pipe, and coil spring fixers matched with the coil spring bodies are symmetrically arranged on two sides of the inner wall of the aluminum pipe. A driving shaft rod body is arranged on the inner wall of the aluminum pipe, and the coil spring bodies are arranged at the two ends of the driving shaft rod body. According to the double-end coil spring driving shaft rod, the coil spring body is inserted into the coil spring fixing device and the aluminum pipe from the side end, the ending bent angles at the two ends of the coil spring are clamped into the coil spring fixing device and the aluminum pipe respectively, the coil spring fixing device is limited to the two ends of the aluminum pipe shell in a riveting mode, the coil springs at the two ends are rotationally tightened through an external tool, and the coil springs are installed in a sunshade curtain assembly. The double-end inner rotation coil spring drives the shaft rod to achieve uniform stress in the sunshade curtain winding process, and therefore the problems of sunshade curtain winding wrinkles and noise caused by unbalanced motor loads are avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive sunshade retraction systems, specifically a double-end coil spring drive shaft. Background Technology

[0002] Sunshades are widely used in automobiles. Although the curtain retraction systems of different manufacturers are not entirely the same, the problems of wrinkles and loosening during the retraction process have not been completely solved. The existing technology for retracting sunshade curtains mainly comes from two sources: First, the retraction force provided by the metal springs on both sides of the curtain drives the curtain to retract during the retraction process; Second, the curtain is supported by plastic springs on both sides, and a power drive shaft is installed at the end to achieve the purpose of retracting the curtain. Because the material and processing cost of metal springs is much higher than that of plastic springs, this method will gradually be replaced by a plastic spring plus power drive shaft retraction system. This patent optimizes and improves the power drive shaft in the plastic spring plus power drive shaft retraction system.

[0003] The existing power drive shaft structure is assembled from springs, hoses, aluminum tubes, fixtures, and bushings. After the springs are rotated and tightened, they are installed into the sunshade assembly to achieve curtain retraction. However, the current power drive shaft structure is all single-end force rotation (that is, a spring is embedded in the shaft, one end is fixed to the inside of the shaft by riveting interference fit, and the other end is connected to the bushing and flush with the end of the shaft assembly. By applying an external axial rotational force, the spring deforms inside the shaft and generates a rewinding force to drive the entire shaft to rotate). There are problems such as uneven force on the left and right ends during the curtain rewinding process, which leads to wrinkles in the curtain during the rewinding process and inconsistent system load force, which leads to abnormal noise from the motor.

[0004] Based on the existing design, we were inspired to research a shaft that can achieve dual-end power drive. The original intention of this patent is to avoid problems such as curtain wrinkles, motor noise, and inability to retract the shaft due to uneven force during the retraction process of the sunshade assembly by realizing dual-end power drive in the shaft. Utility Model Content

[0005] The purpose of this utility model is to provide a double-ended coil spring drive shaft to solve the problems mentioned in the background art, such as uneven force on the curtain during the rewinding process due to the single spring rotating, which leads to wrinkles in the curtain, inconsistent load on the frame system, and abnormal motor noise. At the same time, with only a single spring providing the rewinding force, the spring rewinding force weakens over time, making it easier for the sunshade curtain to fail to retract.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a double-ended coil spring drive shaft, comprising an aluminum tube, with coil spring bodies symmetrically arranged on both sides of the inner wall of the aluminum tube, and coil spring retainers adapted to the coil spring bodies symmetrically arranged on both sides of the inner wall of the aluminum tube, a drive shaft body arranged on the inner wall of the aluminum tube, and the coil spring bodies arranged at both ends of the drive shaft body, with connecting pins respectively arranged at both ends of the drive shaft body, and balancing components symmetrically arranged on the outside of both ends of the drive shaft body.

[0007] Preferably, the balancing assembly includes a fixed bushing, which is respectively disposed on the outer wall of both ends of the aluminum tube. A mounting shell is provided on one side of the fixed bushing, and the mounting shell is provided with a shaft retaining hole adapted to the drive shaft body.

[0008] Preferably, a first gear is sleeved on the drive shaft body, the first gear is disposed inside the mounting housing, a second gear is meshed with one side of the first gear, and a third gear is meshed with one side of the second gear.

[0009] Preferably, the inner wall of the mounting housing is provided with a first rotating shaft, the second gear is rotatably disposed outside the first rotating shaft, the inner wall of the mounting housing is also provided with a second rotating shaft, and the third gear is rotatably disposed outside the second rotating shaft.

[0010] Preferably, a closed outer shell is slidably provided on the inner wall of one side opening of the mounting housing, and a fixing ring is rotatably provided at both ends of the drive shaft body, with an auxiliary locking block provided on the outer peripheral surface of the fixing ring.

[0011] Preferably, the retaining ring has a connecting screw groove inside, and the outer circumferential surfaces of both ends of the drive shaft body are provided with connecting threads that are adapted to the connecting screw groove. The retaining ring connects and fixes the drive shaft body to the enclosed shell by providing the connecting screw groove and connecting threads.

[0012] Preferably, the enclosed housing is also provided with a shaft retaining hole, and the fixing retaining ring is provided with a retaining pin retaining hole that is adapted to the connecting retaining pin.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This double-ended coil spring drive shaft, by inserting the coil spring retainer into the aluminum tube, inserting the coil spring body from the side into the coil spring retainer and the aluminum tube, and respectively snapping the end bends of the coil spring into the coil spring retainer and the aluminum tube, and using riveting to restrict the coil spring retainer to both ends of the aluminum tube shell, using external tools to rotate and tighten the coil springs at both ends, and installing them into the sunshade assembly, can realize the automatic rewinding of the curtain. The double-ended internal rotation coil spring drive shaft ensures uniform force during the rewinding process of the sunshade curtain, thereby avoiding the noise problems of sunshade curtain rewinding wrinkles and motor load imbalance.

[0015] 2. The double-ended coil spring drive shaft is fixed to both sides of the aluminum tube by a fixed bushing for easy positioning of the drive shaft body. The first gear is fixed to both ends of the drive shaft body. The rotation of the drive shaft body drives the first gear to rotate, the first gear drives the second gear to rotate, and the second gear drives the third gear to rotate, which improves the stability of the drive shaft body rotation. The enclosed shell is fixed to the inner wall of the mounting shell through the shaft retaining hole for easy protection of the gears. The retaining ring is connected to the connecting thread through the connecting screw groove for easy and quick fixation on the enclosed shell to limit the movement of the drive shaft body. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a partial cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is a partial structural schematic diagram of the present invention;

[0019] Figure 4 This is a schematic diagram of the drive shaft body structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the exploded structure of the balancing component of this utility model.

[0021] In the diagram: 1. Aluminum tube; 2. Coil spring body; 3. Coil spring retainer; 4. Drive shaft body; 5. Connecting pin; 6. Balancing assembly; 601. Fixed bushing; 602. Mounting housing; 603. Shaft locking hole; 604. First gear; 605. Second gear; 606. Third gear; 607. First rotating shaft; 608. Second rotating shaft; 609. Enclosed housing; 610. Fixed retaining ring; 611. Auxiliary locking block; 612. Connecting screw groove; 613. Connecting thread; 614. Pin locking hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-5 This utility model provides a technical solution: a double-ended coil spring drive shaft, including an aluminum tube 1, with coil spring bodies 2 symmetrically arranged on both sides of the inner wall of the aluminum tube 1, and coil spring retainers 3 symmetrically arranged on both sides of the inner wall of the aluminum tube 1 to match the coil spring bodies 2. A drive shaft body 4 is arranged on the inner wall of the aluminum tube 1, and the coil spring bodies 2 are arranged at both ends of the drive shaft body 4. Connecting pins 5 are respectively arranged at both ends of the drive shaft body 4, and balancing components 6 are symmetrically arranged on the outside of both ends of the drive shaft body 4. By using the coil spring retainers 3... Insert the coil spring body 2 into the aluminum tube 1, insert it from the side into the coil spring retainer 3 and the aluminum tube 1, and snap the end bends of the coil spring into the coil spring retainer 3 and the aluminum tube 1 respectively. Use riveting to restrict the coil spring retainer 3 to both ends of the aluminum tube 1 shell. Use external tools to rotate and tighten the coil springs at both ends, and install them into the sunshade assembly. This will enable the curtain to roll back automatically. The double-end internally rotating coil spring drive shaft ensures uniform force during the sunshade roll-up process, thereby avoiding the noise problems of sunshade roll-up wrinkles and motor load imbalance.

[0024] The balancing assembly 6 includes fixed bushings 601, which are respectively disposed on the outer walls of both ends of the aluminum tube 1. A mounting housing 602 is provided on one side of each fixed bushing 601. The mounting housing 602 has shaft retaining holes 603 adapted to the drive shaft body 4. A first gear 604 is sleeved on the drive shaft body 4 and is disposed inside the mounting housing 602. A second gear 605 is meshed with one side of the first gear 604, and a third gear 606 is meshed with one side of the second gear 605. The mounting housing 602... The inner wall of the drive shaft 602 is provided with a first rotating shaft 607, and a second gear 605 is rotatably disposed outside the first rotating shaft 607. The inner wall of the mounting housing 602 is also provided with a second rotating shaft 608, and a third gear 606 is rotatably disposed outside the second rotating shaft 608. A closed housing 609 is slidably disposed on the inner wall of one side opening of the mounting housing 602. Fixed retaining rings 610 are rotatably disposed at both ends of the drive shaft body 4. An auxiliary retaining block 611 is provided on the outer circumferential surface of the fixed retaining ring 610. A connecting screw groove 61 is provided inside the fixed retaining ring 610. 2. The outer circumferential surfaces of both ends of the drive shaft body 4 are provided with connecting threads 613 that are compatible with the connecting screw grooves 612. The retaining ring 610 connects and fixes the drive shaft body 4 to the enclosed housing 609 by providing the connecting screw grooves 612 and the connecting threads 613. The enclosed housing 609 is also provided with shaft retaining holes 603. The retaining ring 610 is provided with retaining pin retaining holes 614 that are compatible with the connecting retaining pins 5. The drive shaft body 4 is fixed to both sides of the aluminum tube 1 by the retaining bushing 601 to facilitate the limiting of the drive shaft body 4. The first gear 604 is fixed to the drive shaft. At both ends of the main body 4, the rotation of the drive shaft main body 4 drives the first gear 604 to rotate, the first gear 604 drives the second gear 605 to rotate, and the second gear 605 drives the third gear 606 to rotate, which helps to improve the stability of the rotation of the drive shaft main body 4. The closed shell 609 is fixed to the inner wall of the mounting shell 602 through the shaft retaining hole 603 to protect the gears. The fixing retaining ring 610 is connected to the connecting thread 613 through the connecting screw groove 612 to easily fix it on the closed shell 609 to limit the movement of the drive shaft main body 4, which is convenient and quick.

[0025] Working principle: First, the coil spring retainer 3 is inserted into the aluminum tube 1. The coil spring body 2 is then inserted into the coil spring retainer 3 and the aluminum tube 1 from the side. The two ends of the coil spring are respectively inserted into the coil spring retainer 3 and the aluminum tube 1. The coil spring retainer 3 is then fixed to both ends of the aluminum tube 1 by riveting. The coil springs at both ends are then rotated and wound using external tools and installed into the sunshade assembly. This enables the curtain to automatically roll back. The fixed bushings 601 are fixed to both sides of the aluminum tube 1 to limit the movement of the drive shaft body 4. The first gear 604 is fixed to both ends of the drive shaft body 4. The rotation of the drive shaft body 4 drives the first gear 604 to rotate, and the first gear 604 drives... The rotation of the second gear 605 drives the rotation of the third gear 606, which improves the stability of the rotation of the drive shaft body 4. The enclosed housing 609 is fixed to the inner wall of the mounting housing 602 through the shaft retaining hole 603 to protect the gear. The retaining ring 610 is connected to the connecting thread 613 through the connecting screw groove 612 to fix it on the enclosed housing 609 to limit the movement of the drive shaft body 4. It is convenient and quick. The double-end internal coil spring drives the shaft to achieve uniform force during the sunshade rolling process, thereby avoiding the noise problems of sunshade rollback wrinkles and motor load imbalance. This completes the operation process of a double-end coil spring driven shaft.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-ended coil spring drive shaft, characterized in that, The device includes an aluminum tube (1), on which coil spring bodies (2) are symmetrically arranged on both sides of the inner wall of the aluminum tube (1), and on which coil spring retainers (3) adapted to the coil spring bodies (2) are symmetrically arranged on both sides of the inner wall of the aluminum tube (1), and a drive shaft body (4) is arranged on the inner wall of the aluminum tube (1), and the coil spring bodies (2) are arranged at both ends of the drive shaft body (4), and connecting pins (5) are respectively arranged at both ends of the drive shaft body (4), and balancing components (6) are symmetrically arranged on the outside of both ends of the drive shaft body (4).

2. The double-ended coil spring drive shaft according to claim 1, characterized in that: The balancing assembly (6) includes a fixed bushing (601), which is respectively disposed on the outer walls of both ends of the aluminum tube (1). A mounting shell (602) is provided on one side of the fixed bushing (601), and a shaft retaining hole (603) adapted to the drive shaft body (4) is provided on the mounting shell (602).

3. A double-ended coil spring drive shaft according to claim 2, characterized in that: The drive shaft body (4) is fitted with a first gear (604), which is located inside the mounting housing (602). A second gear (605) is meshed with one side of the first gear (604), and a third gear (606) is meshed with one side of the second gear (605).

4. A double-ended coil spring drive shaft according to claim 3, characterized in that: The inner wall of the mounting housing (602) is provided with a first rotating shaft (607), and the second gear (605) is rotatably disposed outside the first rotating shaft (607). The inner wall of the mounting housing (602) is also provided with a second rotating shaft (608), and the third gear (606) is rotatably disposed outside the second rotating shaft (608).

5. A double-ended coil spring drive shaft according to claim 2, characterized in that: A closed housing (609) is slidably provided on the inner wall of one side opening of the mounting housing (602), and a fixing ring (610) is rotatably provided at both ends of the drive shaft body (4), and an auxiliary locking block (611) is provided on the outer peripheral surface of the fixing ring (610).

6. A double-ended coil spring drive shaft according to claim 5, characterized in that: The fixed retaining ring (610) has a connecting screw groove (612) inside. The outer circumferential surfaces of both ends of the drive shaft body (4) are provided with connecting threads (613) that are compatible with the connecting screw groove (612). The fixed retaining ring (610) connects and fixes the drive shaft body (4) to the closed shell (609) by providing the connecting screw groove (612) and the connecting thread (613).

7. A double-ended coil spring drive shaft according to claim 5, characterized in that: The enclosed housing (609) is also provided with a shaft locking hole (603), and the fixing ring (610) is provided with a locking pin locking hole (614) that is compatible with the connecting pin (5).

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