Electric angle adjuster

Abstract

The utility model relates to an electric recliner which comprises a gear ring, a toothed plate, an integrated eccentric part, a driving wedge-shaped part and a spring, the gear ring and the toothed plate can be meshed in a rotating mode relative to each other, the integrated eccentric part is installed on the toothed plate and acts on the driving wedge-shaped part, and the spring is installed on the driving wedge-shaped part. The bent inner surfaces of the integrated eccentric part and the driving wedge-shaped part make contact with the toothed plate so as to act on the toothed plate and act on the gear ring through the bent outer surfaces of the toothed plate, and the two opposite ends of the spring are connected with the integrated eccentric part and the driving wedge-shaped part so as to act in the circumferential direction. Eccentric rotation is defined by the integral eccentric and active wedge to press the toothed plate into the ring gear. According to the electric recliner and the integrated eccentric piece, an original eccentric piece and a driven wedge-shaped piece are combined into a whole, the problem of regular shaking of a backrest of a seat in the lifting process can be solved, the comfort of the seat is improved, the problem of abnormal noise of the recliner is solved, and the durability of the seat is improved.

Description

Technical Field

[0001] This utility model relates to automobile seats, and more specifically to an electric angle adjuster. Background Technology

[0002] As a key component of car seats, the seat adjuster not only connects the backrest and seat cushion but also adjusts the tilt angle of the seat back. Existing seat adjusters are mainly divided into two categories: geared plate and ring gear type, and planetary gear type. The geared plate and ring gear type adjuster achieves the locking and adjustment functions of the backrest through the meshing and disengagement of internal and external teeth, and is mostly used for manual adjustment of the seat back angle. Its structure is simple, but it can only adjust the seat back angle at a fixed pitch (i.e., angle), and is also called a "non-continuous seat back adjuster." Figure 8 As shown, planetary gear type seat back adjusters, relying on the small tooth difference structure of their inner and outer gear plates, can achieve stepless adjustment of the seat back, also known as "continuous seat back adjusters," and are mostly used in the electric seats of mid-to-high-end cars. With the rapid development of new energy vehicles, the electrification of car seats has become a new trend, and the widespread application of planetary gear type seat back adjusters is becoming a trend.

[0003] To ensure the stability of the locking strength of the planetary gear angle adjuster, two wedge-shaped components 16' are provided inside, namely the active wedge component 16a and the driven wedge component 16b, such as... Figure 8 As shown, the eccentric member 15' is supported on the cam shaft 121', and the driver for driving the eccentric member 15' is mounted inside the cam shaft 121' via a hub. During seat adjustment, the driver drives the eccentric member 15' to rotate, pushing the active wedge member 16a, which in turn drives the driven wedge member 16b. When the direction of the seat backrest's movement is the same as the direction of the external load, the two wedge members 16' will not come together but will maintain a relative distance. During this process, the force inside the seat adjuster is stable, and the two wedge members 16' will not move circumferentially. When the direction of the seat backrest's movement is opposite to the direction of the external load, the friction inside the seat adjuster increases, and the two wedge members 16' will come together. During this process, gaps will be generated on the teeth of the seat adjuster, causing the force on the two wedge members 16' to change. This causes the driven wedge member 16b to move circumferentially, resulting in backrest vibration and affecting the overall comfort of the seat. Utility Model Content

[0004] To solve the jitter problem in the prior art, this utility model provides an electric angle adjuster.

[0005] According to the present invention, an electric angle adjuster includes a gear ring, a gear plate, an integral eccentric member, an active wedge member, and a spring. The gear ring and the gear plate are rotatably meshed with each other. The integral eccentric member is mounted on the gear plate and acts on the active wedge member. The curved inner surfaces of the integral eccentric member and the active wedge member respectively contact the gear plate to act on the gear plate and act on the gear ring through their curved outer surfaces. The opposite ends of the spring are connected to the integral eccentric member and the active wedge member to act in the circumferential direction. The eccentric rotation is limited by the integral eccentric member and the active wedge member to press the gear plate into the gear ring.

[0006] In a preferred embodiment, the integral eccentric member includes an integrally formed eccentric portion and a driven wedge portion, and the integral eccentric member and the driven wedge member are spread apart by a spring to form a double wedge structure.

[0007] In a preferred embodiment, the toothed plate has a convex shaft, and an integral eccentric component is mounted on the convex shaft.

[0008] In a preferred embodiment, the inner surface of the integral eccentric member at the driven wedge portion is composed of a first arc, a second arc, and a third arc, wherein the first arc and the third arc have the same curvature and leave a first gap with the cam shaft, and the second arc acting on the cam shaft has a different curvature.

[0009] In a preferred embodiment, the electric angle adjuster further includes a bushing fitted onto the curved outer surface of the integral eccentric member and the active wedge member.

[0010] In a preferred embodiment, the outer surface of the integral eccentric member at the driven wedge portion is composed of a fourth arc, a fifth arc, and a sixth arc with different curvatures, wherein the fifth arc acting on the bushing connects the fourth arc and the sixth arc, and the fourth arc and the sixth arc on both sides leave a second gap with the bushing.

[0011] In a preferred embodiment, the integrated eccentric component has a circular hole and a clearance groove, wherein one end of the spring is inserted into the circular hole for fixation, and the other end of the spring passes through the clearance groove and is fixed to the lower active wedge component.

[0012] In a preferred embodiment, the electric angle adjuster further includes a cam connected to a motor, and an integral eccentric element engages with the cam to rotate accordingly.

[0013] According to the electric angle adjuster of this utility model, the integrated eccentric component combines the original eccentric component and the driven wedge component into one, which can solve the problem of regular shaking of the seat back during the lifting process, improve the comfort of the seat, and when the backrest changes direction, the impact sound of the eccentric component and the driven wedge component also disappears, solving the problem of abnormal noise of the angle adjuster. In addition, the shaking of the backrest will accelerate the wear inside the angle adjuster, resulting in a reduction in the number of durability cycles, so eliminating the shaking can also improve the durability of the seat. Attached Figure Description

[0014] Figure 1 This is an exploded view of an electric angle adjuster according to a preferred embodiment of the present invention.

[0015] Figure 2 yes Figure 1 An assembly diagram of the integrated eccentric component and wedge block.

[0016] Figure 3 yes Figure 2 A schematic diagram of the first structure of the integrated eccentric component.

[0017] Figure 4 yes Figure 2 The second structural schematic diagram of the integrated eccentric component.

[0018] Figure 5 yes Figure 1 An assembly diagram of the integrated eccentric component, the toothed plate's convex shaft, and the bushing.

[0019] Figure 6 yes Figure 1 An assembly diagram of the integrated eccentric component, active wedge component, gear plate, bushing and gear ring.

[0020] Figure 7 yes Figure 1 An assembly diagram of the integrated eccentric component, active wedge component, toothed plate's convex shaft and bushing.

[0021] Figure 8 This is a schematic diagram of the structure of a planetary gear type seat adjuster in the prior art. Detailed Implementation

[0022] The preferred embodiments of this utility model are given below with reference to the accompanying drawings and described in detail.

[0023] like Figure 1 As shown, an electric angle adjuster according to a preferred embodiment of the present invention includes a gear ring 11 and a gear plate 12 that are rotatably meshed with each other, and a cooperating cover 13 and a clamp 14 for fixing the gear ring 11 and the gear plate 12 together. It should be understood that the installation of the cover 13 and the clamp 14 does not impede the relative rotation of the gear ring 11 and the gear plate 12.

[0024] To drive the relative rotation of the gear ring 11 and the gear plate 12, the electric angle adjuster according to this embodiment further includes an integral eccentric member 15, an active wedge member 16, a bushing 17, a spring 18, a cam 19, and a thrust ring 20. The thrust ring 20 is mounted on the free end of the cam 19 to prevent the cam 19 from disengaging. The cam 19 has a central spline shaft hole to receive a drive shaft connected to a motor. The integral eccentric member 15 is fitted with the cam 19 and mounted on the cam shaft 121 of the gear plate 12 to rotate therewith and act on the active wedge member 16. The integral eccentric member 15 and the active wedge member 16 act on the cam shaft 121 of the gear plate 12 through their curved inner surfaces and on the gear ring 11 through the bushing 17 fitted on their curved outer surfaces. The opposite ends of the spring 18 connect the integral eccentric member 15 and the active wedge member 16 to act in the circumferential direction. Thus, the eccentric rotation is limited by the integrated eccentric member 15 and the active wedge member 16 to press the gear plate 12 into the gear ring 11. During the adjustment process, the motor drives the integrated eccentric member 15 to rotate via the cam 19, thereby compressing the spring 18. When the spring force of the spring 18 overcomes the frictional force on the active wedge member 16 or when the integrated eccentric member 15 and the active wedge member 16 come into contact, the active wedge member 16 rotates synchronously under the drive of the integrated eccentric member 15. Since the contact surface between the outer side of the active wedge member 16 and the gear ring 11 is eccentrically designed, the gear ring 11 rotates eccentrically relative to the gear plate 12 under the action of the integrated eccentric member 15 and the active wedge member 16 and meshes with the gear plate 12, forming a relative rotation with planetary gear motion.

[0025] like Figure 2 As shown, the integral eccentric component 15 includes, but is not limited to, an eccentric portion 151 and a driven wedge portion 152 integrally formed using powder metallurgy or plastic molding processes. The driven wedge portion 152 and the driving wedge component 16 are separated by a spring 18 to form a double wedge structure. See [reference needed]. Figure 6 .

[0026] like Figure 3 As shown, the integral eccentric member 15 includes a first arc A, a second arc B, and a third arc C on the inner surface of the driven wedge portion 152. The first arc A and the third arc C have the same diameter. The second arc B is located between the first arc A and the third arc C and has a diameter that fits against the convex shaft 121 (see [reference]). Figure 1 and Figure 5 The first arc A and the third arc C on both sides leave a gap T between them and the convex shaft 121 (see [reference]). Figure 5 This ensures that the second arc B can always contact the convex shaft 121. In the prior art where two wedge-shaped components are mounted on an eccentric member, the inner surfaces of the two wedge-shaped components contact and engage with the eccentric member. In contrast, the inner hole of the integral eccentric member 15 of this invention is made larger, and the outer diameter of the convex shaft 121 is also made larger, so that the inner surface of the driven wedge 152 (and the active wedge 16) contacts the convex shaft 121.

[0027] like Figure 4 As shown, the integral eccentric member 15 includes a fourth arc D, a fifth arc E, and a sixth arc F with different diameters on the outer surface of the driven wedge portion 152. The fourth arc D has a diameter, the fifth arc E has a diameter, and the sixth arc F has a diameter. The fifth arc E is located between the fourth arc D and the sixth arc F and fits against the bushing 17 (see...). Figure 1 and Figure 5 The fourth arc D and the sixth arc F on both sides leave a gap T between the bushing 17 (see...). Figure 5 ).

[0028] like Figure 5 and Figure 6 As shown, the integral eccentric component 15 has a circular hole 153 and a clearance groove 154, wherein the spring 18 (see Figure 1 One end of the spring 18 is inserted into the circular hole 153 and fixed, while the other end of the spring 18 passes through the clearance groove 154 and is fixed to the lower active wedge 16. Obviously, in the static state, the integrated eccentric member 15 and the active wedge 16 retain the double wedge shape, which can ensure the function and strength of the seat adjuster.

[0029] When the direction of movement of the seat back is consistent with the direction of the external load, the driven wedge 152 and the active wedge 16 of the integrated eccentric member 15 will not come together, but will move at a relative distance, thereby eliminating the internal gap of the seat adjuster. During this process, the internal force of the seat adjuster is stable, and the driven wedge 152 and the active wedge 16 will not move in the circumferential direction.

[0030] like Figure 7 As shown, when the direction of the seat back's movement is opposite to the direction of the external load, the integrated eccentric member 15 drives the active wedge member 16 to move. The active wedge member 16 gradually moves towards the driven wedge portion 152 of the integrated eccentric member 15. The driven wedge member, which would normally shift during movement in the prior art, is now connected to the eccentric portion 151, preventing shifting. This solves the problem of vibration during seat back movement by combining the driven wedge member and eccentric member, thus improving comfort. In a sense, when the direction of the seat back's movement is opposite to the direction of the external load, the electric angle adjuster of this invention does not have a driven wedge member. Therefore, this invention can solve the problem of insufficient operation due to vibration during durability testing, accelerated wear, and optimized movement lag during seat back reversal, as well as reducing internal impact noise. Moreover, the overall dimensions and installation of the integrated eccentric component 15 and the active wedge component 16 of this utility model are basically consistent with those of the existing eccentric component and two wedge components, making them suitable for modular production applications.

[0031] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various variations can be made to the above embodiments of this utility model. That is, all simple and equivalent changes and modifications made based on the claims and description of this utility model application fall within the protection scope of the claims of this utility model patent. Any aspects of this utility model not described in detail are conventional technical content.

Claims

1. An electric angle adjuster, characterized in that, The electric angle adjuster includes a gear ring, a gear plate, an integral eccentric member, an active wedge, and a spring. The gear ring and the gear plate are rotatably meshed with each other. The integral eccentric member is mounted on the gear plate and acts on the active wedge. The curved inner surfaces of the integral eccentric member and the active wedge contact the gear plate to act on the gear plate and act on the gear ring through their curved outer surfaces. The opposite ends of the spring connect the integral eccentric member and the active wedge to act in the circumferential direction. The eccentric rotation is limited by the integral eccentric member and the active wedge to press the gear plate into the gear ring.

2. The electric angle adjuster according to claim 1, characterized in that, The integrated eccentric component includes an integrally formed eccentric part and a driven wedge part. The integrated eccentric component and the driven wedge part are separated by a spring to form a double wedge structure.

3. The electric angle adjuster according to claim 2, characterized in that, The toothed plate has a convex shaft, and an integral eccentric component is mounted on the convex shaft.

4. The electric angle adjuster according to claim 3, characterized in that, The inner surface of the integrated eccentric component at the driven wedge is composed of a first arc, a second arc and a third arc, wherein the first arc and the third arc have the same curvature and leave a first gap with the cam shaft, and the second arc acting on the cam shaft has a different curvature.

5. The electric angle adjuster according to claim 2, characterized in that, The electric angle adjuster also includes bushings fitted onto the curved outer surfaces of the integrated eccentric member and the active wedge member.

6. The electric angle adjuster according to claim 5, characterized in that, The outer surface of the integral eccentric part at the driven wedge is composed of a fourth, a fifth, and a sixth circular arc with different curvatures. The fifth circular arc, which acts on the bushing, connects the fourth and sixth circular arcs, and the fourth and sixth circular arcs on both sides leave a second gap with the bushing.

7. The electric angle adjuster according to claim 1, characterized in that, The integrated eccentric component has a round hole and a clearance groove. One end of the spring is inserted into the round hole for fixation, and the other end of the spring passes through the clearance groove and is fixed to the lower active wedge component.

8. The electric angle adjuster according to claim 1, characterized in that, The electric angle adjuster also includes a cam connected to a motor, and an integrated eccentric element engages with the cam to rotate accordingly.

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