Silent ball screw-nut anti-backlash mechanism for seat recliner

Abstract

The utility model relates to the technical field of seat angle adjuster and discloses a mute ball screw - nut anti - backlash mechanism for seat angle adjuster, including angle adjuster body, the oil supply lubricating mechanism is provided with in the front of angle adjuster body, be provided with driving mechanism in the angle adjuster body, the oil supply lubricating mechanism includes oil tank, the oil tank fixed connection is in the front of angle adjuster body, the oil tank body inner wall has the lifting plate that slides up and down, through setting up the oil supply lubricating mechanism, including oil tank, lifting plate, slide rod and oil outlet pipe etc. assembly, has realized the accurate oil supply lubrication of the meshing place of angle adjuster internal gear and toothed plate regulator, the lubricating oil in the oil tank is directly conveyed to the key friction part through the oil outlet pipe, effectively reduced the direct contact and wear and tear between components, prolonged the service life of angle adjuster, simultaneously, the design of lifting plate and slide rod makes the oil supply process more stable controllable, has guaranteed the continuity of lubrication effect.

Description

Technical Field

[0001] This utility model relates to the field of seat adjuster technology, specifically a silent ball screw-nut backlash elimination mechanism for seat adjusters. Background Technology

[0002] The seat adjuster is the core component for adjusting the seat back angle, and its performance directly affects the user's comfort and safety. As users' requirements for smooth operation, quietness, and service life of seats continue to increase, ball screw and nut structures have gradually become the core transmission components of mid-to-high-end seat adjusters due to their advantages of high transmission precision and efficiency. The "backlash elimination" design further solves the problems of adjustment jamming and angle deviation caused by the meshing gap between the screw and nut, becoming a key direction in the current development of seat adjusters.

[0003] Currently, most angle adjuster backlash elimination mechanisms rely on manual periodic lubrication or pre-set solid grease. Manual lubrication requires disassembling the seat or angle adjuster housing, which is cumbersome and prone to problems such as "untimely lubrication" and "misalignment of lubrication points." This is especially problematic in enclosed installation scenarios such as car seats, making subsequent maintenance extremely difficult. While pre-set solid grease eliminates the need for frequent operation, the grease gradually deteriorates due to friction, heat, and oxidation over time. This results in a lack of effective lubrication at critical friction points such as the lead screw and nut engagement and the gear and toothed plate adjuster engagement, thus exacerbating component wear. Wear not only increases the operating clearance of the backlash elimination mechanism and compromises its original quiet operation but can also cause the angle adjuster to jam, make abnormal noises, and in severe cases, even lead to transmission failure, shortening the overall lifespan of the angle adjuster. Utility Model Content

[0004] The purpose of this invention is to provide a silent ball screw-nut backlash elimination mechanism for a seat adjuster, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a silent ball screw-nut backlash elimination mechanism for a seat adjuster, comprising an adjuster body, an oil supply and lubrication mechanism provided on the front of the adjuster body, and a drive mechanism provided inside the adjuster body; The oil supply and lubrication mechanism includes an oil tank, which is fixedly connected to the front of the angle adjuster body. A lifting plate is slidably connected to the inner wall of the oil tank body. A rectangular sealing ring is fixedly connected around the lifting plate. A sliding rod is fixedly connected to the bottom of the lifting plate. An oil filling hole is opened at the top of the oil tank. A bolt is installed in the oil filling hole. A sealing gasket is fitted on the surface of the bolt. An oil outlet pipe is fixedly connected to the top of the back of the oil tank. A fixing rod is fixedly connected to the front of the inner wall of the angle adjuster body. A fixing ring is fixedly connected to the rear end of the fixing rod.

[0006] Preferably, the bottom of the oil tank has a hole that matches the slide bar, and the slide bar is slidably connected to the hole by passing through its surface.

[0007] Preferably, the oil injection hole has a threaded groove, and the bolt surface is threaded into the threaded groove. The front of the angle adjuster body has a hole, and the oil outlet pipe is located in and passes through the hole.

[0008] Preferably, the surface of the oil outlet pipe is fixedly connected to the inner wall of the fixing ring to support the oil outlet pipe, and the other end of the oil outlet pipe is aligned with the meshing part of the gear and toothed plate adjuster inside the angle adjuster.

[0009] Preferably, the driving mechanism includes a fixed column, which is fixedly connected to the rotating shaft surface of the angle adjuster body. A hinge is hinged to the other end of the fixed column, and a hinge column is hinged to the other end of the hinge. A connecting plate is fixedly connected to the bottom end of the slide rod, and a slide column is fixedly connected to the top of the connecting plate near the front. A hinge frame is fixedly connected to the top of the slide column, and a fixed sleeve is fixedly connected to the front of the oil tank.

[0010] Preferably, the surface of the sliding column is connected to the inner wall of the fixed sleeve through and sliding up and down, making the up and down movement of the sliding column more stable.

[0011] Preferably, the other end of the hinge column is hinged within the hinge frame.

[0012] Compared with the prior art, this utility model provides a silent ball screw-nut backlash elimination mechanism for a seat adjuster, which has the following advantages: 1. This seat adjuster uses a silent ball screw-nut backlash elimination mechanism. By setting up an oil supply and lubrication mechanism, including components such as an oil tank, lifting plate, slide rod, and oil outlet pipe, it achieves precise oil supply and lubrication at the meshing points of the gears and gear plate adjuster inside the adjuster. The lubricating oil in the oil tank is directly delivered to the key friction parts through the oil outlet pipe, effectively reducing direct contact and wear between components and extending the service life of the adjuster. At the same time, the design of the lifting plate and slide rod makes the oil supply process more stable and controllable, ensuring the continuity of lubrication effect.

[0013] 2. This seat adjuster uses a silent ball screw-nut backlash elimination mechanism. The oil supply and lubrication mechanism is linked with the drive mechanism. When the rotating shaft of the adjuster body is running, it will drive the sliding column and connecting plate to move up and down through the transmission of components such as the fixed column, hinge, and hinge column. This will push the lifting plate in the oil tank. With the sealing effect of the lifting plate and the rectangular sealing ring, the lubricating oil in the oil tank can be accurately pressed out to the oil outlet pipe. The oil outlet pipe is directly aligned with the meshing point of the gear and the toothed plate adjuster inside the adjuster, realizing the automatic synchronous effect of lubrication during operation. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a three-dimensional structural schematic diagram of the present utility model; Figure 2 This is a three-dimensional sectional view of the front of the fuel tank of this utility model. Figure 3 This is a three-dimensional schematic diagram of the inner back of the body of the angle adjuster of this utility model; Figure 4 This is a three-dimensional schematic diagram of the structural drive mechanism of this utility model.

[0015] In the diagram: 1. Adjuster body; 2. Oil supply and lubrication mechanism; 21. Oil tank; 22. Lifting plate; 23. Rectangular sealing ring; 24. Slide rod; 25. Oil injection hole; 26. Bolt; 27. Sealing gasket; 28. Oil outlet pipe; 29. ​​Fixed rod; 211. Fixed ring; 3. Drive mechanism; 31. Fixed column; 32. Hinge; 33. Hinge column; 34. Connecting plate; 35. Slide rod; 36. Hinge frame; 37. Fixed sleeve. Detailed Implementation

[0016] 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.

[0017] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0018] This utility model provides the following technical solution: Example 1 Please see Figure 1-3This utility model provides a technical solution: a silent ball screw-nut backlash elimination mechanism for a seat adjuster, including an adjuster body 1, an oil supply and lubrication mechanism 2 provided on the front of the adjuster body 1, and a drive mechanism 3 provided inside the adjuster body 1. The oil supply and lubrication mechanism 2 includes an oil tank 21, which is fixedly connected to the front of the angle adjuster body 1. A lifting plate 22 is slidably connected to the inner wall of the oil tank 21. A rectangular sealing ring 23 is fixedly connected around the lifting plate 22. A sliding rod 24 is fixedly connected to the bottom of the lifting plate 22. An oil filling hole 25 is opened at the top of the oil tank 21. A bolt 26 is installed in the oil filling hole 25. A sealing gasket 27 is sleeved on the surface of the bolt 26. An oil outlet pipe 28 is fixedly connected to the top of the back of the oil tank 21. A fixing rod 29 is fixedly connected to the front of the inner wall of the angle adjuster body 1. A fixing ring 211 is fixedly connected to the rear end of the fixing rod 29.

[0019] The bottom of the oil tank 21 has a hole that matches the slide bar 24, and the slide bar 24 is connected to the hole by sliding up and down through the surface of the slide bar 24.

[0020] The oil filling hole 25 has a threaded groove, and the bolt 26 is threaded into the threaded groove. The front of the angle adjuster body 1 has a hole, and the oil outlet pipe 28 is located in and passes through the hole.

[0021] The surface of the oil outlet pipe 28 is fixedly connected to the inner wall of the fixing ring 211 to support the oil outlet pipe 28. The other end of the oil outlet pipe 28 is aligned with the meshing part of the gear and toothed plate adjuster inside the angle adjuster.

[0022] Example 2 Please see Figure 4 Furthermore, based on Embodiment 1, a driving mechanism 3 is obtained.

[0023] The drive mechanism 3 includes a fixed column 31, which is fixedly connected to the rotating shaft surface of the angle adjuster body 1. A hinge member 32 is hinged to the other end of the fixed column 31, and a hinge column 33 is hinged to the other end of the hinge member 32. A connecting plate 34 is fixedly connected to the bottom end of the slide rod 24. A slide column 35 is fixedly connected to the top of the connecting plate 34 near the front. A hinge frame 36 is fixedly connected to the top of the slide column 35. A fixed sleeve 37 is fixedly connected to the front of the oil tank 21.

[0024] The sliding column 35 is connected to the inner wall of the fixed sleeve 37 through the surface and slides up and down, making the up and down movement of the sliding column 35 more stable.

[0025] The other end of the hinge post 33 is hinged to the hinge frame 36.

[0026] In actual operation, when this device is used, and the user operates the seat angle adjuster to adjust the angle, the rotating shaft of the adjuster body 1 will rotate accordingly, thereby driving the fixed column 31 fixed on the surface of the rotating shaft to rotate synchronously. Since the other end of the fixed column 31 is hinged to the hinge member 32, the rotational motion of the fixed column 31 is converted into the swinging motion of the hinge member 32. The hinge member 32 then transmits the power to the hinge frame 36 through the hinge column 33 hinged at the other end. At this time, the sliding column 35, which is fixedly connected to the hinge frame 36, will slide steadily up and down along the inner wall of the fixed sleeve 37 under the guiding and limiting action of the fixed sleeve 37 on the front of the oil tank 21. The bottom end of the sliding column 35 is fixedly connected to the connecting plate 34, and the connecting plate 34 is connected to the sliding rod 24 in the oil tank 21, thus realizing the closed loop of power transmission from the rotation of the rotating shaft to the up and down movement of the sliding rod 24. When the sliding rod 24 moves upward with the connecting plate 34, it will push the lifting plate 22 in the oil tank 21. Simultaneous ascent: Because the lifting plate 22 is fixed with rectangular sealing rings 23 around its perimeter, and the rectangular sealing rings 23 are tightly fitted with the inner wall of the oil tank 21, an effective sealing space can be formed, compressing the lubricating oil below the lifting plate 22. Under pressure, the lubricating oil in the oil tank 21 will be forced into the oil outlet pipe 28 at the top of the back of the oil tank 21. The oil outlet pipe 28 is positioned and supported by the fixing rod 29 and the fixing ring 211, and its opening is always aligned with the meshing point of the gear and the tooth plate adjuster inside the angle adjuster. Finally, the lubricating oil is accurately delivered to the key friction parts to complete the lubrication operation. When the rotating shaft of the angle adjuster rotates in the opposite direction, the drive mechanism 3 will drive the slide rod 24 and the lifting plate 22 to return to their original position. A negative pressure is formed in the oil tank 21. If lubricating oil needs to be added at this time, the bolt 26 with the sealing gasket 27 in the oil filling hole 25 can be unscrewed, and new oil can be added to the oil tank 21 through the oil filling hole 25. The cooperation between the bolt 26 and the sealing gasket 27 can ensure the sealing of the oil tank 21 after oil filling.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A silent ball screw-nut backlash elimination mechanism for a seat adjuster, comprising an adjuster body (1), characterized in that: The angle adjuster body (1) is provided with an oil supply and lubrication mechanism (2) on the front, and a drive mechanism (3) is provided inside the angle adjuster body (1). The oil supply and lubrication mechanism (2) includes an oil tank (21), which is fixedly connected to the front of the angle adjuster body (1). A lifting plate (22) is slidably connected to the inner wall of the oil tank (21). A rectangular sealing ring (23) is fixedly connected around the lifting plate (22). A sliding rod (24) is fixedly connected to the bottom of the lifting plate (22). An oil filling hole (25) is opened at the top of the oil tank (21). A bolt (26) is installed in the oil filling hole (25). A sealing gasket (27) is sleeved on the surface of the bolt (26). An oil outlet pipe (28) is fixedly connected to the top of the back of the oil tank (21). A fixing rod (29) is fixedly connected to the front of the inner wall of the angle adjuster body (1). A fixing ring (211) is fixedly connected to the rear end of the fixing rod (29).

2. The silent ball screw-nut backlash elimination mechanism for a seat adjuster according to claim 1, characterized in that: The bottom of the oil tank (21) has a hole that matches the slide bar (24), and the surface of the slide bar (24) is connected to the hole by sliding up and down.

3. The silent ball screw-nut backlash elimination mechanism for a seat adjuster according to claim 1, characterized in that: The oil injection hole (25) has a threaded groove, and the bolt (26) is threaded into the threaded groove. The angle adjuster body (1) has a hole on the front, and the oil outlet pipe (28) is located and passes through the hole.

4. The silent ball screw-nut backlash elimination mechanism for a seat adjuster according to claim 1, characterized in that: The surface of the oil outlet pipe (28) is fixedly connected to the inner wall of the fixing ring (211), and the other end of the oil outlet pipe (28) is aligned with the meshing point of the gear and toothed plate adjuster inside the angle adjuster.

5. The silent ball screw-nut backlash elimination mechanism for a seat adjuster according to claim 1, characterized in that: The drive mechanism (3) includes a fixed column (31), which is fixedly connected to the rotating shaft surface of the angle adjuster body (1). A hinge (32) is hinged to the other end of the fixed column (31), and a hinge column (33) is hinged to the other end of the hinge (32). A connecting plate (34) is fixedly connected to the bottom end of the slide rod (24). A slide column (35) is fixedly connected to the top of the connecting plate (34) near the front. A hinge frame (36) is fixedly connected to the top of the slide column (35). A fixed sleeve (37) is fixedly connected to the front of the oil tank (21).

6. The silent ball screw-nut backlash elimination mechanism for a seat adjuster according to claim 5, characterized in that: The sliding column (35) is connected to the inner wall of the fixed sleeve (37) through the surface and slides up and down.

7. The silent ball screw-nut backlash elimination mechanism for a seat adjuster according to claim 5, characterized in that: The other end of the hinge post (33) is hinged to the hinge frame (36).

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