Double-end-driven curved sunshade curtain recovery shaft lever structure

Abstract

The utility model discloses a double-end-driven curved sunshade curtain recovery shaft lever structure, which belongs to the technical field of automobile parts and comprises a curved iron pipe, a double-end spring driving assembly is arranged outside the curved iron pipe, and the double-end spring driving assembly comprises a double-end spring positioner sleeved on the curved iron pipe. The double-end spring positioner is fixedly connected to the curved iron pipe, the two ends of the double-end spring positioner are symmetrically connected with two springs through threads, the springs are arranged outside the curved iron pipe in a sleeving mode, the outer sides of the springs are sleeved with hoses, the other ends of the springs are connected with spring shafts respectively, and shaft sleeves are connected to the spring shafts in a penetrating mode and used for achieving assembly sealing. The double-end spring driving assembly is sleeved with a plastic corrugated pipe. According to the double-end-driven curved sunshade curtain recovery shaft rod structure, the problems that sunshade curtain rewinding wrinkles and abnormal sounds caused by unbalanced motor loads are solved, the head space of passengers in a vehicle is occupied are solved, the problems of sunshade curtain wrinkles and motor noise are obviously reduced, and the head space is obviously enlarged.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology, and in particular relates to a dual-end driven curved sunshade retraction shaft structure. Background Technology

[0002] Sunshades are widely used in cars. Although the curtain retraction systems of different manufacturers are not entirely the same, they have not completely solved the problems of wrinkles and loosening during the sunshade retraction process. With the development of the automotive industry, consumers' requirements for headroom are also getting higher and higher.

[0003] In existing technologies, the main power source for the retraction of sunshade curtain fabric comes from two aspects: First, the retraction force provided by the metal springs on both sides of the curtain fabric drives the curtain fabric to retract during the retraction process; Second, the curtain fabric is supported by plastic springs on both sides, and a power drive shaft is installed at the tail end to achieve the purpose of retracting the curtain fabric.

[0004] Because the material and processing costs of metal springs are much higher than those of plastic springs, this method will gradually be replaced by plastic springs plus a power drive shaft recovery system. Since most of the rear power drive shafts are straight shafts, they will encroach on the head space of the occupants.

[0005] The existing power drive shaft structure uses springs, hoses, aluminum tubes, fasteners, and bushings for assembly. The curtain is then wound by rotating the springs and installed into the sunshade assembly to retract the curtain fabric. However, current power drive shaft structures all involve single-end force rotation (i.e., a spring is embedded inside the shaft, one end is fixed to the inside of the shaft by riveting, and the other end is connected to a bushing flush with the end of the shaft assembly; an external axial rotational force is applied, causing the spring to deform inside the shaft and generate a rewinding force that drives the entire shaft to rotate). This results in uneven force on both ends during curtain rewinding, leading to wrinkles in the curtain and inconsistent system load causing abnormal motor noise.

[0006] Therefore, there is an urgent need for a new technical solution to address this problem. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a double-ended driven curved sunshade curtain retraction shaft structure to solve the problems of uneven force on the curtain retraction, abnormal motor noise, and occupancy of headroom in the vehicle in the prior art.

[0008] The technical solution adopted by this utility model is to provide a double-ended driven curved sunshade curtain retraction shaft structure, including a curved iron pipe. A double-ended spring drive assembly is provided on the outside of the curved iron pipe. The double-ended spring drive assembly includes a double-ended spring positioner sleeved on the curved iron pipe. The double-ended spring positioner is fixed to the curved iron pipe. Two springs are symmetrically connected to the two ends of the double-ended spring positioner by threads. The springs are sleeved on the outside of the curved iron pipe. A flexible tube is sleeved on the outside of the spring. The other end of the spring is connected to a spring shaft. A bushing is passed through the spring shaft to achieve component sealing.

[0009] The double-ended spring drive assembly is externally fitted with a plastic corrugated tube.

[0010] The curved iron pipe is made of 304 stainless steel.

[0011] The plastic corrugated pipe is made of PA6 material.

[0012] The double-ended spring positioner is fixedly connected to the curved iron pipe by riveting.

[0013] The tightening torque of the spring is not constrained, but is constrained by its size, material, and number of turns.

[0014] Through the above design scheme, this utility model can bring the following beneficial effects:

[0015] 1. Dual-sided balanced drive: The dual-spring symmetrical layout eliminates the problem of stress concentration on one side and reduces the wrinkle rate of the curtain fabric.

[0016] 2. Space optimization: The curved iron pipes avoid the headroom of the main body structure, improving the utilization rate of vertical space inside the vehicle.

[0017] 3. Material compatibility: The plastic corrugated pipe is compatible with the curved iron pipe, which is suitable for the rotational deformation requirements of the curved iron pipe and reduces the risk of stress unloading during long-term use.

[0018] 4. Stable structure: The bushings at both ends serve as fixing components to ensure the stability of the fit between the spring and the shaft. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a dual-end driven curved sunshade curtain retraction shaft structure according to the present invention.

[0020] Figure 2 This is a partially enlarged schematic diagram of a dual-end driven curved sunshade curtain retraction shaft structure according to this utility model.

[0021] In the diagram, 1-curved iron pipe, 2-double-ended spring positioner, 3-spring, 4-hose, 5-spring shaft, 6-shaft sleeve, 7-plastic corrugated pipe. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0023] like Figure 1 As shown, the present invention discloses a double-ended driven curved sunshade curtain retraction shaft structure, which includes a curved iron pipe 1. A double-ended spring drive assembly is provided on the outside of the curved iron pipe 1. The double-ended spring drive assembly includes a double-ended spring positioner 2 sleeved on the curved iron pipe 1. The double-ended spring positioner 2 is fixedly connected to the curved iron pipe 1. Two springs 3 (not shown in the figure) are symmetrically connected to the two ends of the double-ended spring positioner 2 by threads. The springs 3 are sleeved on the outside of the curved iron pipe 1. A flexible hose 4 is sleeved on the outside of the springs 3. The other end of the springs 3 is connected to a spring shaft 5. A bushing 6 passes through the spring shaft 5 to achieve component sealing.

[0024] The double-end spring drive assembly is externally fitted with a plastic corrugated tube 7.

[0025] Preferably, the plastic corrugated pipe 7 is made of PA6 material.

[0026] Preferably, the double-ended spring positioner 2 is fixedly connected to the curved iron pipe 1 by riveting.

[0027] Preferably, the tightening torque of spring 3 is not constrained, but constrained by its size, material and number of turns, typically 35 turns.

[0028] Example: GAC A66 platform sunshade drive shaft

[0029] 1. Material selection:

[0030] The curved iron pipe 1 is made of 304 stainless steel, with a bending radius R = 1200mm;

[0031] The plastic corrugated pipe 7 is made of PA6 with a wall thickness of 20.9mm.

[0032] Spring 3 is made of SWP-B (JIS G 3522) material, with a spring wire diameter of 1.5mm and an outer diameter of 15-0.3mm.

[0033] 2. Assembly steps:

[0034] Rivet the double-ended spring positioner 2 to both ends of the curved iron pipe 1;

[0035] Two sets of springs 3 are screwed into the threaded holes of the positioner, with the number of turns controlled between 30 and 40 turns;

[0036] Insert the flexible hose 4 and the plastic corrugated pipe 7, and install POM bushings 6 at both ends.

[0037] 3. Effect Verification:

[0038] The double-sided deviation of the curtain rewind force is ≤5%, and the occurrence rate of abnormal motor noise is reduced by 90%.

[0039] Headroom space occupancy reduced by 30mm.

[0040] The embodiments of this utility model have been described above, but they should not be construed as limiting the claims. This utility model is not limited to the above embodiments, and its specific structure is allowed to vary. All changes made within the scope of protection of the claims of this utility model are within the scope of protection of this utility model.

Claims

1. A curved sunshade curtain retraction shaft structure with dual-end drive, characterized in that: The device includes a curved iron pipe (1), and a double-end spring drive assembly is provided on the outside of the curved iron pipe (1). The double-end spring drive assembly includes a double-end spring positioner (2) sleeved on the curved iron pipe (1). The double-end spring positioner (2) is fixed on the curved iron pipe (1). Two springs (3) are symmetrically connected to the two ends of the double-end spring positioner (2) by threads. The springs (3) are sleeved on the outside of the curved iron pipe (1). A flexible hose (4) is sleeved on the outside of the springs (3). The other end of the springs (3) is connected to a spring shaft (5). A bushing (6) is passed through the spring shaft (5) to achieve component sealing. The double-ended spring drive assembly is externally fitted with a plastic corrugated tube (7).

2. The dual-end driven curved sunshade curtain retraction shaft structure according to claim 1, characterized in that: The curved iron pipe (1) is made of 304 stainless steel.

3. The dual-end driven curved sunshade curtain retraction shaft structure according to claim 1, characterized in that: The plastic corrugated pipe (7) is made of PA6 material.

4. The dual-end driven curved sunshade curtain retraction shaft structure according to claim 1, characterized in that: The double-ended spring positioner (2) is fixedly connected to the curved iron pipe (1) by riveting.

5. The dual-end driven curved sunshade curtain retraction shaft structure according to claim 1, characterized in that: The tightening torque of the spring (3) is not constrained, but is constrained by its size, material and number of turns.

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