Front electric sliding rail and seat

Abstract

The utility model discloses a front electric sliding rail which comprises a first rail and a second rail which generate relative displacement through a driving device to enable a seat to linearly slide. The driving device is provided with a lead screw fixedly arranged on the first rail, a driving mechanism used for driving the lead screw to rotate and a locking mechanism fixedly arranged on the second rail, and a metal screwing structure is arranged between the locking mechanism and the lead screw. On one hand, a wing edge lining is arranged between a nut and a locking mechanism to limit the moving range of a buffering piece, reduce loss and improve strength, on the other hand, an input gear in a gearbox is made of metal, an output gear is made of plastic, the problem that the mechanism moves up and down during movement is solved, and meanwhile the mute performance is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of seat slide rail, especially relates to a front electric slide rail and seat. BACKGROUND

[0002] In the existing slide rail screw rod transmission structure, the locking mechanism mostly adopts pure metal nut structure and engages with the screw rod, this kind of engagement mode is high although, but first track 5, metal screw rod 2, metal locking mechanism 4 and second track 1 all are connected transmission through pure metal parts, and this kind of connection relation is easy to produce transmission feeling and scraping sound influence the riding experience in the transmission process.

[0003] Therefore, one of the solutions is that the nut in the locking mechanism 4 is suspended by a buffer member, so that it does not directly contact the locking mechanism support, and the vibration is blocked by the buffer member from the first track 5 to the second track 1 along the screw rod 2 and the locking mechanism 4. However, the nut member of the suspension structure is easily squeezed by the rubber member during the working process under the action of the screw rod 2. Long-term use will cause the gap between the internal parts to become larger, and there will be a very obvious jumping and shaking feeling on the actual new energy vehicle. SUMMARY

[0004] In order to overcome the above-mentioned defects of the prior art, the purpose of the utility model is to provide a front electric slide rail and seat to improve the large gap between the screw rod and the locking mechanism under the condition of endurance working.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A front electric slide rail, comprising a first track and a second track for linear sliding of a seat by relative displacement of a driving device, the driving device having a screw rod fixed to the first track 5 and a driving mechanism for driving the screw rod to rotate, and a locking mechanism fixed to the second track and having a metal screw structure with the screw rod.

[0007] Further, the locking mechanism is fixed to the second track by a locking mechanism support, and a nut for screwing with the screw rod is arranged on the locking mechanism support.

[0008] Further, the nut and the locking mechanism support are flexibly connected by at least one elastic member, and a bushing is further arranged between the elastic member and the nut to reduce friction and avoid the elastic member from being twisted by the screwing of the nut.

[0009] Further, the bushing has at least one wing extending transversely, and the wing wraps the elastic member from the outside to avoid the elastic member from being squeezed and worn out.

[0010] Further, the bushings are arranged in pairs at both ends of the nut.

[0011] Further, the driving mechanism and the lead screw are driven through a first gear and a second gear, the first gear is made of metal, and the second gear is made of plastic or a plastic-metal mixed material.

[0012] Further, the second gear is fixed to the end of the lead screw through a metal base shaft, the second gear external teeth are arranged on the outer periphery of the metal base shaft and form an integral structure, and the second gear external teeth are made of plastic.

[0013] Further, a base shaft gear ring is arranged on the outer surface of the metal base shaft, and the second gear external teeth are arranged on the base shaft gear ring.

[0014] Further, the second gear is arranged on the end of the lead screw and forms an integral structure.

[0015] A seat comprising the front-mounted electric slide rail.

[0016] The utility model has the advantages that:

[0017] The front-mounted electric slide rail and the seat have the following advantages: first, the wing edge bushing is arranged between the nut and the locking mechanism to limit the movement range of the buffer and reduce the loss and improve the strength; and second, the input gear in the gear box is changed to a metal material, and the output gear is changed to a plastic material to improve the problem of up-and-down movement during the movement of the mechanism and improve the silent performance. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description.

[0019] Figure 1 is the overall schematic view of the utility model.

[0020] Figure 2 is the first embodiment schematic view of the locking mechanism of the utility model.

[0021] Figure 3 is the A-A sectional view of Figure 2 .

[0022] Figure 4 is the first embodiment schematic view of the gear box of the utility model.

[0023] Figure 5 is the second embodiment schematic view of the gear box of the utility model. DETAILED DESCRIPTION

[0024] In the description of the utility model, it is necessary to explain that the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and the above description is simplified for the convenience of describing the utility model, and does not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0025] The singular forms "a", "said", and "the" used in the description are intended to encompass plural forms unless the context clearly indicates otherwise. The terms "comprise", "include" and "contain" used in the description indicate the presence of the stated feature, but do not exclude the presence of one or more other features.

[0026] In the description, when one element is said to be "on", "fixed to", "connected to", "joined to" or the like another element, the element can be directly on, fixed to, connected to, joined to or in contact with the other element, or there can be an intermediate element.

[0027] It can be understood that although the terms "first", "second" and the like can be used herein to describe different elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. Therefore, the first element can be called the second element without departing from the teachings of the present application.

[0028] The exemplary embodiments of the present application will be described below with reference to the accompanying drawings. It should be understood, however, that the present application can be presented in various ways and is not limited to the embodiments described below. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide additional embodiments. In all the drawings, the same reference numerals represent the same or functionally similar elements.

[0029] Reference Figure 1 The main structure of the front electric sliding rail assembly is shown. The assembly drives the first rail 5 and the second rail 1 to axially slide relative to each other through a set of driving devices, which are screw driving structures that realize displacement through a screw rod 2 and a locking mechanism 4 screwed onto the screw rod 2. The driving mechanism 31 that drives the screw rod 2 to rotate and work, and the gear box 3 with a one-stage transmission structure composed of a first gear 32 and a second gear 33 arranged between the screw rod 2 and the driving mechanism 31.

[0030] Figure 2 And Figure 3The locking mechanism 4 in the front electric sliding rail assembly is shown, which includes a first locking mechanism support 41 fixed as a whole on the second rail 1, a first nut 42 clamped in the first locking mechanism support 41 through an elastic member 45, and the lead screw 2 penetrating into the first nut 42 from one side of the first locking mechanism support 41 and then out from the other end. This flexible connection mode can effectively buffer the vibration transmitted from the lead screw 2. A bushing 44 is arranged between the elastic member 45 and the first nut 42 to reduce friction and improve lubrication between the two parts. Since the first nut 42 will relatively float and deflect during the rotation of the lead screw 2, the bushing 44 reduces the friction between the two parts to prevent the elastic member 45 from being extruded and damaged by the first nut 42. Specifically, the bushing 44 isolates the contact end surface of the elastic member 45 and the first nut 42, thereby reducing the damage that the elastic member 45 may suffer. Further, the bushing 44 has a wing edge 44a extending forward and backward from the side and lapping on the side wall of the first locking mechanism support 41 to limit the outward overflow of the elastic member 45 from the outside. In a preferred embodiment, the bushing 44 is arranged at both ends of the first nut 42 in the axial direction.

[0031] Figure 4 and Figure 5 The gear box structure in the front electric sliding rail assembly is shown, which includes a first gear 32 and a second gear 33 engaged with the first gear 32 for transmission. Since the rotation speed of the first gear 32 is greater than that of the second gear 33, the first gear 32 is made of metal to improve the dimensional accuracy and ensure stable transmission. The second gear 33 is made of plastic to ensure low noise of the gear box 3 during operation. Since the materials of the second gear 33 and the lead screw 2 are different, they cannot be connected together by simple assembly process.

[0032] Figure 4 A first preferred embodiment is specifically shown, in which the second gear 33 is integrally plasticized at the end of the lead screw 2. This connection mode effectively avoids the problem of large size deviation of the parts caused by material deformation in the original metal riveting structure.

[0033] Figure 5 A second preferred embodiment is specifically shown, in which a base shaft gear ring 34a is arranged on the outer periphery of a metal base shaft 34, and the second gear outer teeth 33a are directly formed on the base shaft 34 by injection molding process to form an integral structure. The tooth structure of the base shaft gear ring 34a can increase the connection area of the second gear outer teeth 33a and the base shaft 34 to improve the strength, and finally the base shaft 34 is press-fitted at the end of the lead screw 2.

Claims

1. A front electric slide rail comprising a first rail and a second rail which are relatively displaced by a driving device to linearly slide a seat, characterized in that, The driving device has a screw rod fixed on the first track, a driving mechanism for driving the screw rod to rotate, and a locking mechanism fixed on the second track and having a metal screwing structure with the screw rod; The locking mechanism is fixed on the second track through a locking mechanism support, and a nut for screwing with the screw rod is arranged on the locking mechanism support; The nut and the locking mechanism support are flexibly connected through at least one elastic member, and a bushing is arranged between the elastic member and the nut to reduce friction and avoid the elastic member from being twisted by the nut.

2. A front-mounted motorized slide rail as claimed in claim 1, characterized in that, The bushing has at least one wing extending transversely, which wraps the elastic member from the outside to avoid the elastic member from being extruded and abraded.

3. A front motorized slide rail as claimed in claim 2, characterized in that The bushing is arranged at both ends of the nut in pairs.

4. A front-mounted electrically powered slide rail as claimed in any one of claims 1 to 3, characterized in that, The driving mechanism and the screw rod are driven through a first gear and a second gear, the first gear is made of metal, and the second gear is made of plastic or a plastic-metal mixed material.

5. A front motorized slide rail as claimed in claim 4, characterized in that The second gear is fixed on the end of the screw rod through a metal base shaft, the second gear outer teeth are arranged on the outer periphery of the metal base shaft and form an integral structure, and the second gear outer teeth are made of plastic.

6. A front motorized slide rail as claimed in claim 5, characterized in that, A base shaft gear ring is arranged on the outer surface of the metal base shaft, and the second gear outer teeth are arranged on the base shaft gear ring.

7. A front motorized slide rail as claimed in claim 4, characterized in that, The second gear is arranged on the end of the screw rod and forms an integral structure.

8. A seat, characterized by The application further provides a front electric sliding rail comprising the front electric sliding rail as claimed in any one of claims 1 to 7.

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