Spindle driving device

Abstract

The utility model provides a main shaft driving device which comprises a main shaft nut, a main shaft, a main shaft guiding pipe, a limiting component and a main shaft guiding component. The spindle nut is threadedly engaged with the spindle at one end of the spindle. The spindle extends through the spindle guide tube. The limiting component is located near the opposite end of the main shaft and used for limiting axial movement of the main shaft in the main shaft guiding pipe. Compared with the limiting component, the spindle guide component is closer to the opposite end of the spindle, contacts with the spindle guide tube, can move along the inner wall of the spindle guide tube and keeps the spindle to stably move axially without shaking to generate noise. The main shaft is provided with a circumferential groove for positioning the limiting component and the main shaft guiding component. According to the utility model, the limiting component is constructed into an annular structure with a conical inner ring, and the circumferential groove of the main shaft is correspondingly constructed into a complementary conical shape so as to be matched with the inner ring of the limiting component. According to the main shaft driving device, the number of components can be reduced, the machining difficulty of the main shaft is reduced, the assembly process is simplified, and then the manufacturing cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of vehicles, specifically to a main shaft drive device for the tailgate of an electric vehicle. Background Technology

[0002] Existing vehicle spindle drive systems generally consist of a spindle nut 1, a spindle 2, a spindle guide tube 3, a limiting component 4, and a spindle guide component 5, such as... Figure 1A As shown. Figures 1B-1F Examples of these five components are shown separately. The spindle nut 1 is threaded into the spindle 2 at one end of the spindle to convert rotational motion into linear axial movement. The spindle 2 extends through the spindle guide tube 3, where a motor drives the spindle 2 to rotate, which in turn drives the spindle nut 1, thereby causing the spindle guide tube 3 to move linearly axially. The limiting component 4, generally a metal component, is positioned near the opposite end of the spindle 2 to limit the axial movement of the spindle 2 within the spindle guide tube 3. For this purpose, the spindle guide tube 3 has a neck 3a near the end near the spindle nut 1. The neck 3a, in cooperation with the limiting component 4, limits the range of axial movement of the spindle 2 within the spindle guide tube 3. The spindle guide component 5, generally a plastic or flocked component for low-noise guidance, is positioned at the opposite end of the spindle, contacts the spindle guide tube, can move along the inner wall of the spindle guide tube, and maintains stable axial movement of the spindle without shaking or generating noise.

[0003] Currently, there are three common types of limit components and spindle guide components, namely as follows: Figure 2A , 2B As shown in 2C. The first type is a metal ring structure, with flocking on its outer circumference and a protrusion 4a on its inner circumference. This protrusion is inserted into a corresponding notch 2a on the end of the main shaft 2, as shown in Figure 2C. Figure 2A As shown. Here, the spindle guide component also serves as the limiting component 4. A disadvantage of this type of construction is that the metal ring of this component rubs against the inner wall of the spindle guide tube 3 during movement, causing the outer fuzz of the metal ring to be scraped off, resulting in noise. The second type is a construction combining a plastic ring and a metal ring, as shown... Figure 2B As shown, two metal rings (as limiting components 4) clamp a plastic ring (as a spindle guide component 5) in the middle to prevent the plastic ring from being damaged by riveting, thus fixing the axial displacement of the plastic ring. Here, the spindle 2 has a circumferential groove 2b at a corresponding position at its end to position the metal ring and the plastic ring. The disadvantage of this type of construction is that it has a large number of components. The third type is a snap-fit ​​plastic ring construction. Here, as... Figure 2C As shown, the spindle 2 has two spaced circumferential grooves 2c and 2d at corresponding positions at its ends, so that... Figure 1E The limiting component 4 shown and Figure 1FThe spindle guide component 5 is shown in the diagram. A disadvantage of this type of construction is the need for a complex spindle structure to accommodate the plastic ring, resulting in higher spindle manufacturing costs.

[0004] There is a need to improve existing spindle drive devices. Therefore, the purpose of this invention is to overcome the aforementioned shortcomings of the prior art. Summary of the Invention

[0005] Therefore, this utility model provides a spindle drive device, including a spindle nut, a spindle, a spindle guide tube, a limiting component, and a spindle guide component. The spindle nut is threadedly engaged with the spindle at one end to convert rotational motion into linear axial movement. The spindle extends through the spindle guide tube for guidance. The limiting component is located near the opposite end of the spindle and restricts the axial movement of the spindle within the spindle guide tube. The spindle guide component is closer to the opposite end of the spindle than the limiting component, contacts the spindle guide tube, and can move along the inner wall of the spindle guide tube, maintaining stable axial movement of the spindle without shaking or noise. The spindle has a circumferential groove to position the limiting component and the spindle guide component. According to this utility model, the limiting component is constructed as an annular structure with a conical inner ring, and the circumferential groove of the spindle is correspondingly constructed as a complementary conical shape to cooperate with the inner ring of the limiting component.

[0006] and Figure 2A Compared to the solution shown, the spindle drive device of this utility model reduces noise and lowers production costs. Figure 2B Compared to the scheme shown, the present invention has a reduced number of components. Figure 2C Compared to the proposed solution, the spindle machining difficulty is reduced.

[0007] According to an embodiment, the outer ring of the limiting component is divided into a large-diameter portion and a small-diameter portion, and the main shaft guide component is radially disposed on the small-diameter portion and axially abuts against the large-diameter portion. Preferably, the large-diameter portion and the small-diameter portion are cylindrical.

[0008] According to an embodiment, the spindle guide component is constructed as a snap ring that snaps onto a limiting component, for example, snaps onto a small diameter portion, and the outer radius of the spindle guide component is greater than the outer radius of the large diameter portion of the limiting component.

[0009] According to an embodiment, the limiting member is clamped between the two side walls of the circumferential groove, and the main shaft guide member is clamped between the large diameter portion of the limiting member and the side wall of the circumferential groove near the opposite end of the main shaft.

[0010] According to one embodiment, the spindle guide tube has a neck near the end close to the spindle nut. This arrangement, in conjunction with a limiting component, restricts the axial movement range of the spindle within the spindle guide tube.

[0011] According to an embodiment, by pressing the opposite ends of the spindle into a flat surface, the opposite ends of the spindle are constructed as a limiting joint with a diameter larger than the inner diameter of the limiting component and the inner diameter of the spindle guide component to facilitate limiting, for example, by constructing a riveting joint. With this arrangement, during assembly, the aforementioned opposite ends of the spindle can first be machined into, for example, a tapered shape, then the limiting component and the spindle guide component are assembled sequentially, and then the opposite ends are riveted to form a riveting joint, wherein the limiting component simultaneously provides limiting for the riveting joint. Thus, during the riveting process, the limiting component and the spindle guide component are positioned and clamped within the circumferential groove, thereby simplifying the assembly process.

[0012] Compared with existing spindle drive devices, the spindle drive device of this invention can reduce the number of components, reduce the difficulty of spindle machining, and simplify the assembly process, thereby reducing manufacturing costs. Attached Figure Description

[0013] The embodiments of the present invention will be explained in more detail in the accompanying drawings, in which:

[0014] Figure 1A This is a schematic cross-sectional view of an example of a prior art spindle drive device;

[0015] Figure 1B yes Figure 1A A schematic perspective view of the spindle nut of the spindle drive device shown;

[0016] Figure 1C yes Figure 1A A schematic perspective view of the spindle of the spindle drive device shown;

[0017] Figure 1D yes Figure 1A A schematic perspective view of the spindle guide tube of the spindle drive device shown.

[0018] Figure 1E This is a schematic perspective view of an example of a limiting component in a prior art spindle drive device;

[0019] Figure 1F This is a schematic perspective view of an example of a spindle guide component in a prior art spindle drive device;

[0020] Figure 2A yes Figure 1A A partial cross-sectional view of the spindle drive device shown.

[0021] Figure 2B This is a partial cross-sectional view of another example of a prior art spindle drive device;

[0022] Figure 2C This is a partial schematic diagram of yet another example of a prior art spindle drive device, which uses... Figure 1EThe limiting components shown and Figure 1F The spindle guide component shown;

[0023] Figure 3A This is a partial schematic diagram of the spindle of the spindle drive device according to an embodiment of the present utility model;

[0024] Figure 3B This is a partial schematic diagram of the spindle drive device according to an embodiment of the present invention, showing the limiting component and the spindle guide component.

[0025] In the accompanying drawings, embodiments of the present invention are shown in a simplified manner for clarity. The drawings are not necessarily shown to scale. Similar reference numerals in the drawings denote similar parts. Detailed Implementation

[0026] The following reference Figures 3A-3B This invention describes a spindle drive device according to an embodiment of the present invention.

[0027] and Figure 1A Similar to the spindle drive device shown, the spindle drive device of this embodiment includes a spindle nut (not shown), a spindle 2, a spindle guide tube (not shown), a limiting member 4, and a spindle guide member 5. The spindle nut is threaded into the spindle at one end to convert rotational motion into linear axial movement. The spindle 2 extends through the spindle guide tube, where a motor drives the spindle 2 to rotate, which in turn drives the spindle nut 1, thereby causing the spindle guide tube to move linearly axially. The limiting member 4 is located near the opposite end of the spindle 2 and is used to limit the axial movement of the spindle within the spindle guide tube. The spindle guide member 5 is closer to the opposite end of the spindle 2 than the limiting member 4, contacts the spindle guide tube, and can move along the inner wall of the spindle guide tube, maintaining stable axial movement of the spindle without shaking or generating noise. The spindle guide tube has a neck near the end near the spindle nut to limit the range of axial movement of the spindle within the spindle guide tube by cooperating with the limiting member.

[0028] Unlike existing spindle drive devices, such as Figure 3A As shown, the spindle 2 has a tapered circumferential groove 2e (a foolproof design to prevent the limiting component from being installed backwards) to position the limiting component and the spindle guide member therein. The opposite ends of the spindle 2 are configured as limiting joints 2f, preferably riveted joints formed by riveting. The diameter of the limiting joint 2f is larger than the inner diameter of the limiting component and the spindle guide member. Figure 3B As shown, the limiting component 4 has a ring structure, with an inner ring 4b that is conical and an outer ring divided into a large-diameter portion 4c and a small-diameter portion 4d, both of which are cylindrical. The conical shape of the circumferential groove 2e of the main shaft 2 complements the conical shape of the inner ring 4b to mate with the inner ring 4b of the limiting component 4. Furthermore, the limiting component 4 is axially clamped between the two side walls of the circumferential groove 2e.

[0029] In this example, the spindle guide component 5 is constructed as a snap-fit ​​ring, which snaps radially onto the small-diameter portion 4d of the limiting component 4 and abuts axially against the large-diameter portion 4c, such that the spindle guide component 5 is clamped between the large-diameter portion 4c of the limiting component 4 and the groove wall of the circumferential groove 2e near the opposite end of the spindle. Furthermore, the outer radius of the spindle guide component 5 is larger than the outer radius of the large-diameter portion 4c of the limiting component 4.

[0030] The presently preferred embodiments of this utility model have been explained in detail above, intended to illustrate the principles of the utility model, and the wording and expressions used are illustrative rather than restrictive. Those skilled in the art will understand that various modifications and variations of the above embodiments are possible without departing from the scope of this utility model. Therefore, in some cases, features disclosed in this utility model may be used independently of other features. On the other hand, features disclosed in this utility model may be combined when necessary to provide various combinations.

Claims

1. A spindle drive device, comprising a spindle nut, a spindle, a spindle guide tube, a limiting component, and a spindle guide component, wherein, The spindle nut is threaded into the spindle at one end of the spindle. The spindle extends through the spindle guide tube. The limiting component is located near the opposite end of the spindle. The spindle guide component is closer to the opposite end of the spindle than the limiting component, contacts the spindle guide tube, and can move along the inner wall of the spindle guide tube. The spindle is provided with a circumferential groove, and the limiting component and the spindle guide component are positioned in the circumferential groove. The limiting component is constructed as an annular structure with a conical inner ring, and the circumferential groove of the spindle is correspondingly constructed as a complementary conical shape.

2. The spindle drive device according to claim 1, characterized in that, The outer ring of the limiting component is divided into a large diameter section and a small diameter section. The spindle guide component is radially positioned on the small diameter section and axially abuts against the large diameter section.

3. The spindle drive device according to claim 2, characterized in that, The spindle guide component is constructed as a snap ring, which snaps onto the small diameter portion of the limiting component, and the outer radius of the spindle guide component is larger than the outer radius of the large diameter portion of the limiting component.

4. The spindle drive device according to claim 3, characterized in that, The limiting component is clamped between the two side walls of the circumferential groove, and the main shaft guide component is clamped between the large diameter portion of the limiting component and the side wall of the circumferential groove near the opposite end of the main shaft.

5. The spindle drive device according to any one of claims 1-4, characterized in that, The spindle guide tube has a neck near the end close to the spindle nut.

6. The spindle drive device according to claim 3, characterized in that, The opposite ends of the spindle are configured as a limiting joint, the diameter of which is larger than the inner diameter of the limiting component and the spindle guide component.

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