Lead screw and lead screw supporting seat matching structure of automobile seat sliding rail

Abstract

The utility model discloses a matching structure of a lead screw and a lead screw supporting seat of an automobile seat sliding rail, and belongs to the technical field of automobile parts. Which comprises a lead screw, a lead screw supporting seat and a lead screw fixing seat, and is characterized by further comprising a flexible isolation piece for isolating the left end of the lead screw from the lead screw supporting seat at the position corresponding to a lead screw supporting seat hole, the middle of the flexible isolation piece is matched with the lead screw supporting seat hole in an embedded mode, the left end of the flexible isolation piece stretches out of the lead screw supporting seat hole to be in contact with the left side face of the lead screw supporting seat, and the right end of the flexible isolation piece also stretches out of the lead screw supporting seat hole to be in contact with the right side face of the lead screw supporting seat. And the left end of the lead screw penetrates through the flexible isolation piece, extends to the left side of the lead screw supporting seat and is locked by the lead screw end part locking nut. The utility model has the advantages of good vibration and noise reduction effect; the flexible separator exerts an excellent damping effect, thereby well absorbing vibration energy, reducing transmission of vibration to a slide rail and even a seat frame, and improving riding comfort and quietness by reducing resonance.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology, specifically relating to a screw and screw support mating structure for an automotive seat slide rail. Background Technology

[0002] As is known in the industry, the two ends of the aforementioned lead screw (also called "lead rod" or "screw") are respectively supported between a pair of lead screw support seats (also called "lead rod seats" or "screw seats"). The pair of lead screw support seats are usually fixed at both ends of the lower slide rail (also called "static slide rail" or "outer slide rail"). The seat sliding frame driven by the drive device is threadedly engaged with the lead screw, and when the drive device operates clockwise or counterclockwise, it drives the seat sliding frame and the seat to move forward or backward along the lead screw, so as to meet the passenger's requirements for adjusting the position of the car seat. For details, please refer to the "Automatic Slide Rail Device for Car Seat" recommended by Chinese Patent CN214083960U.

[0003] In practical use, one end of the aforementioned lead screw (such as the rear end) is usually connected to one of the lead screw support seats in a non-removable manner or even pressed together by riveting. The other end of the lead screw (such as the front end) is connected to the other lead screw support seat in the pair, i.e. the lead screw support seat located at the front end of the lower slide rail, in a removable (disassembled) threaded connection relationship. This is to meet the installation requirements of the relevant components that cooperate with the lead screw transmission and the requirements of possible maintenance. For details, please refer to the "Automotive Seat Slide Rail with Anti-deformation Function and its Automotive Seat" provided in Chinese Invention Patent Application Publication No. CN119239412A.

[0004] The lead screw and lead screw support mating structure of the automotive seat slide rail in existing technologies, including the patents mentioned above, is composed of... Figure 3 As shown, the device includes a lead screw 1 and a lead screw support 2. The left end of the lead screw 1 extends through the lead screw support hole 21 in the upper part of the lead screw support 2 to the left side of the lead screw support 2 and is locked or unlocked by the lead screw end locking nut 11. In addition, in order to improve the locking effect of the lead screw end locking nut 11 on the left end of the lead screw 1, a washer 12 is provided on the lead screw 1 and located on the right side of the lead screw support 2. The right end of the lead screw 1 is fixed to the lead screw fixing seat (not shown in the figure) and forms a non-removable fixed connection with the lead screw fixing seat.

[0005] The above is from Figure 3The illustrated lead screw and lead screw support structure of a car seat exhibits the following shortcomings in actual use: Because the connection between the left end of the lead screw and the lead screw support is rigid, vibrations and bumps during vehicle operation are transmitted to the car seat slide rail, generating noise. Due to assembly and tolerance issues, the rigid connection requires precise dimensional matching between the lead screw hole and the lead screw itself; otherwise, gaps may occur, leading to wobbling, or the screw may be too tight to install, making it difficult or even impossible to achieve the optimal balance. Foreign objects entering the gap between the lead screw and the lead screw support can cause jamming or wear, damaging both the lead screw and the support. Given these and other factors, improvements are necessary, and the technical solution described below arose from this context. Utility Model Content

[0006] The objective of this invention is to provide a screw-screw support mating structure that helps to transform the rigid connection between the lead screw and the lead screw support into an elastic connection, thereby achieving good vibration reduction and noise reduction; facilitates excellent damping to effectively absorb vibration energy and reduce the transmission of vibration to the slide rail and even the seat frame; improves ride comfort and quietness by reducing resonance; helps to compensate for tolerances by adaptively filling gaps or absorbing interference within a certain range, making assembly easier; reasonably reduces excessively stringent requirements on the machining accuracy of parts; significantly reduces friction and fretting wear to protect the lead screw surface and the bore wall of the lead screw support and extend service life; helps to achieve good sealing and dustproof effects to prevent dust and foreign matter from intruding; helps to absorb impacts to absorb the instantaneous impact load generated on the lead screw during adjustment or vehicle bumps; and also helps to protect the drive mechanism of the automotive seat slide rail.

[0007] The present invention achieves its objective as follows: a lead screw and lead screw support structure for an automotive seat slide rail includes a lead screw, a lead screw support, and a lead screw fixing seat. The left end of the lead screw extends through a lead screw support hole in the upper part of the lead screw support to the left side of the lead screw support and is locked by a lead screw end locking nut. The right end of the lead screw is supported on the lead screw fixing seat and forms a non-removable fixed connection with the lead screw fixing seat. In use, the lead screw support and the lead screw fixing seat are fixed to the lower slide rail of the automotive seat slide rail. The invention is characterized in that it further includes a compliant isolator for isolating the left end of the lead screw from the lead screw support at a position corresponding to the lead screw support hole. The middle part of the compliant isolator is fitted into the lead screw support hole, and the left end of the compliant isolator protrudes from the lead screw support hole and contacts the left side of the lead screw support. Similarly, the right end of the compliant isolator protrudes from the lead screw support hole and contacts the right side of the lead screw support. The left end of the lead screw extends through the compliant isolator to the left side of the lead screw support and is locked by the lead screw end locking nut.

[0008] In a specific embodiment of this utility model, the compliant isolator has a compliant isolator through hole extending from the left end to the right end, and the left end of the lead screw extends from the right end of the compliant isolator through the left end of the compliant isolator through hole to the left side of the lead screw support.

[0009] In another specific embodiment of this utility model, the left end of the compliant isolation member is extended with a lead screw support seat with the left side contacting the flange edge, and the right end of the compliant isolation member is also extended with a lead screw support seat with the right side contacting the flange edge. The right side of the lead screw support seat with the flange edge is in close contact with the left side of the lead screw support seat without gaps, and the left side of the lead screw support seat with the flange edge is in close contact with the right side of the lead screw support seat without gaps.

[0010] In another specific embodiment of this utility model, the left and right end openings of the lead screw support hole of the lead screw support seat are each formed with an inverted conical surface around the circumference of the lead screw support seat. The inverted conical surface makes the left and right end openings of the lead screw support hole flared. The base of the right side of the left side of the lead screw support seat of the compliant isolation member that contacts the flange edge and the base of the left side of the right side of the lead screw support seat that contacts the flange edge respectively contact and cooperate with the inverted conical surface.

[0011] In another specific embodiment of this utility model, the left and right end openings of the through hole of the compliant insulating member are each configured as a flared shape with the diameter increasing from the inside to the outside.

[0012] In another specific embodiment of this utility model, a screw support anti-sway positioning flange is provided at the lower part of the screw support and around the screw support. In use, the lower surface of the screw support anti-sway positioning flange contacts the surface of the bottom wall of the lower slide rail of the car seat facing upward.

[0013] In a further specific embodiment of this utility model, a screw support mounting seat extends from the screw support seat and is located below the anti-sway positioning flange of the screw support seat. A fastener hole is formed at the center of the bottom of the screw support mounting seat. The fastener hole is a blind hole and has a fastener hole wall thread on the hole wall. In use, the screw support mounting seat extends below the lower rail of the car seat at the position corresponding to the mounting seat hole opened on the lower rail of the car seat and is fixed to the lower rail of the car seat by a fastener at the position corresponding to the fastener hole.

[0014] In a further specific embodiment of this utility model, the longitudinal cross-sectional shape of the compliant insulating member is H-shaped.

[0015] In yet another specific embodiment of this utility model, the compliant insulating element is made of rubber, nylon, or polytetrafluoroethylene.

[0016] In yet another specific embodiment of this utility model, the rubber is natural rubber or synthetic rubber; the nylon is a base aliphatic nylon, which is PA6, PA66, PA1010, PA610 or PA612.

[0017] The technical advantages of this utility model are as follows: By innovatively adding a compliant isolator, freeing it from the constraints of traditional design concepts, the left end of the lead screw is isolated from the lead screw support at the position corresponding to the lead screw support hole. This transforms the rigid connection between the lead screw and the lead screw support in existing technologies into an elastic connection, resulting in excellent vibration reduction and noise reduction. The compliant isolator provides excellent damping, effectively absorbing vibration energy and reducing the transmission of vibration to the slide rail and even the seat frame. Furthermore, by reducing resonance, it improves riding comfort and quietness. Due to its compliant nature... Isolators can compensate for tolerances, thus enabling adaptive filling of gaps or absorption of interference within a certain range, making assembly easier and reasonably reducing excessively demanding requirements on the machining accuracy of parts; compliant isolators can significantly reduce friction and fretting wear, which helps protect the surface of the lead screw and the bore wall of the lead screw support and extends its service life; compliant isolators help to achieve good sealing and dustproof effects to avoid the intrusion of dust and foreign objects, and are beneficial to absorbing shocks, which is reflected in the instantaneous impact on the lead screw during adjustment or vehicle bumps, and also helps to protect the drive mechanism that drives the upper slide rail to slide. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of an embodiment of the present utility model;

[0019] Figure 2 for Figure 1 A detailed structural diagram of the compliant isolator installed in the screw support hole of the screw support seat is shown.

[0020] Figure 3 This is a structural diagram of the lead screw and lead screw support of an existing automotive seat slide rail. Detailed Implementation

[0021] In order to better understand the technical essence and beneficial effects of this utility model, a detailed description will be given below by way of embodiments. However, the description of the embodiments is not intended to limit the solution of this utility model. Any formal but not substantive equivalent transformations made based on the concept of this utility model should be considered within the scope of the technical solution of this utility model.

[0022] In the following description, all directional or positional concepts involving up, down, left, right, front, and back are based on the current position. Figure 1 The location and state are taken as a reference, and therefore should not be construed as a special limitation on the technical solution provided by this utility model.

[0023] Please see Figure 1 and Figure 2The diagram shows a lead screw 1, a lead screw support 2, and a lead screw fixing seat 3. The left end of the lead screw 1 extends through a lead screw support hole 21 in the upper part of the lead screw support 2 to the left side of the lead screw support 2 and is locked or unlocked by a lead screw end locking nut 11. The right end of the lead screw 1 is supported on the lead screw fixing seat 3 and forms a non-removable fixed connection with the lead screw fixing seat 3. That is, the right end of the lead screw 1 and the lead screw fixing seat 3 form a structure that is almost integrated. Since this structure is a known prior art, the applicant will not elaborate further. In use, the aforementioned lead screw support 2 and lead screw fixing seat 3 are fixed to the lower rail of the automotive seat slide rail.

[0024] The aforementioned locking by the lead screw end locking nut 11 includes two situations: one is locking after initial assembly; the other is locking after unlocking when maintenance is required, and locking after maintenance is completed.

[0025] As a key technical feature of the present invention, the aforementioned automotive seat slide rail screw and screw support seat cooperation structure further includes a compliant isolation member 4 for isolating the left end of the aforementioned screw 1 from the aforementioned screw support seat 2 at a position corresponding to the aforementioned screw support seat hole 21. The middle part of the compliant isolation member 4 is fitted with the aforementioned screw support seat hole 21, and the left end of the compliant isolation member 4 protrudes out of the screw support seat hole 21 and contacts the left side of the screw support seat 2. The right end of the compliant isolation member 4 also protrudes out of the screw support seat hole 21 and contacts the right side of the screw support seat 2. The left end of the aforementioned screw 1 extends through the compliant isolation member 4 to the left side of the screw support seat 2 and is locked by the aforementioned screw end locking nut 11.

[0026] This application breaks free from the constraints of traditional design thinking and innovatively incorporates a compliant isolation element 4 within the lead screw support hole 21. While this may seem like a simple design, it solves a long-standing technical problem or dilemma that had been desired but not effectively addressed, thus demonstrating the various technical effects listed in the applicant's technical effects section above.

[0027] See you later Figure 1 and Figure 2 The aforementioned compliant insulating element 4 has a compliant insulating element through hole 41 extending from the left end to the right end. Figure 2 (As shown), the left end of the aforementioned lead screw 1 extends from the right end of the compliant isolation member through hole 41 to the left side of the aforementioned lead screw support 2.

[0028] Depend on Figure 1 and Figure 2As shown, the left end of the aforementioned compliant isolation member 4 is extended with a lead screw support seat left side contact flange edge 42, and the right end of the compliant isolation member 4 is also extended with a lead screw support seat right side contact flange edge 43. The right side of the aforementioned lead screw support seat left side contact flange edge 42 is in close contact with the left side of the lead screw support seat 2 without gap, and the left side of the aforementioned lead screw support seat right side contact flange edge 43 is in close contact with the right side of the lead screw support seat 2 without gap.

[0029] Depend on Figure 2 As shown, an inverted conical surface 211 is formed at the left and right end openings of the screw support hole 21 of the aforementioned screw support seat 2 and around the circumference of the screw support seat 21. The inverted conical surface 211 makes the left and right end openings of the screw support hole 21 flared. The base of the right side of the left side of the screw support seat of the aforementioned compliant isolation member 4 that contacts the flange edge 42 and the base of the left side of the right side of the screw support seat that contacts the flange edge 43 respectively contact and engage with the aforementioned inverted conical surface 211.

[0030] The left and right end openings of the flexible isolation member through hole 41 of the aforementioned flexible isolation member 4 are each configured as a flared shape with the diameter increasing from the inside to the outside.

[0031] Will Figure 1 When the left end of the lead screw 1 shown is fitted with the aforementioned compliant isolator 4, the lead screw support area 13 (also called the "lead screw support section") at the left end of the lead screw 1 mates with the through hole 41 of the aforementioned compliant isolator. The lead screw step surface 14, located at the left end of the lead screw 1 and to the right of the aforementioned lead screw support area 13, is in close contact with the right side flange edge 43 of the aforementioned lead screw support seat. Furthermore, after the lead screw end locking nut 11 is screwed into the lead screw thread 15 at the left end of the lead screw 1, its right side is in close contact with the left side flange edge 42 of the lead screw support seat. This structure can also eliminate the need for... Figure 3 Gasket 12 with the structure shown.

[0032] See you later Figure 1 and Figure 2 A screw support anti-sway positioning flange edge 22 is provided at the lower part of the aforementioned screw support seat 2 and around the screw support seat 2. In use, the lower surface of the screw support anti-sway positioning flange edge 22 contacts the surface of the bottom wall of the aforementioned car seat slide rail facing upward.

[0033] A screw support mounting base 23 extends from the aforementioned screw support 2 and is located below the anti-sway positioning flange edge 22 of the aforementioned screw support 2. A fastener hole 231 is formed at the center of the bottom of the screw support mounting base 23. The fastener hole 231 is a blind hole and a fastener hole wall thread 2311 is formed on the hole wall. Figure 2As shown in the diagram, in the operating state, the lead screw support mounting base 23 extends below the lower rail at a position corresponding to the mounting hole provided on the lower rail of the aforementioned car seat, and is fixed to the lower rail of the car seat by a fastener at a position corresponding to the aforementioned fastener hole 231. As can be seen from the foregoing description, the fastener hole 231 is essentially a screw mating hole, and the fastener is essentially a screw.

[0034] In this embodiment, the longitudinal cross-sectional shape of the aforementioned compliant isolation member 4 is H-shaped.

[0035] In this embodiment, the aforementioned compliant insulating element 4 is made of rubber, but it can also be made of nylon or polytetrafluoroethylene.

[0036] The aforementioned rubber is natural rubber or synthetic rubber; the aforementioned nylon is a basic aliphatic nylon, and the aforementioned basic aliphatic nylon is PA6, PA66, PA1010, PA610 or PA612.

[0037] Since the function of the lead screw 1 can be found in the patent documents mentioned by the applicant in the background section above, it will not be repeated here.

[0038] In summary, the technical solution provided by this utility model makes up for the shortcomings of the prior art, successfully completes the invention task, and faithfully realizes the technical effects described by the applicant in the above technical effect column.

Claims

1. A screw and screw support mating structure for an automotive seat slide rail, comprising a screw (1), a screw support (2), and a screw fixing seat (3), wherein the left end of the screw (1) extends through a screw support hole (21) in the upper part of the screw support (2) to the left side of the screw support (2) and is locked by a screw end locking nut (11), while the right end of the screw (1) is supported on the screw fixing seat (3) and forms a non-removable fixed connection with the screw fixing seat (3), wherein in use, the screw support (2) and the screw fixing seat (3) are fixed to the lower rail of the automotive seat slide rail, characterized in that: It also includes a compliant isolator (4) for isolating the left end of the lead screw (1) from the lead screw support (2) at a position corresponding to the lead screw support hole (21). The middle part of the compliant isolator (4) is fitted into the lead screw support hole (21), and the left end of the compliant isolator (4) protrudes from the lead screw support hole (21) and contacts the left side of the lead screw support (2). The right end of the compliant isolator (4) also protrudes from the lead screw support hole (21) and contacts the right side of the lead screw support (2). The left end of the lead screw (1) extends through the compliant isolator (4) to the left side of the lead screw support (2) and is locked by the lead screw end locking nut (11).

2. The screw and screw support mating structure of the automotive seat slide rail according to claim 1, characterized in that: The compliant isolator (4) has a compliant isolator through hole (41) extending from the left end to the right end. The left end of the lead screw (1) extends from the right end of the compliant isolator through hole (41) to the left side of the lead screw support (2).

3. The screw and screw support mating structure of the automotive seat slide rail according to claim 1, characterized in that: The left end of the compliant isolation member (4) is extended with a left side contact flange edge (42) of a screw support seat, and the right end of the compliant isolation member (4) is also extended with a right side contact flange edge (43) of a screw support seat. The right side of the left side contact flange edge (42) of the screw support seat is in close contact with the left side of the screw support seat (2), and the left side of the right side contact flange edge (43) of the screw support seat is in close contact with the right side of the screw support seat (2).

4. The screw and screw support mating structure of the automotive seat slide rail according to claim 3, characterized in that: The left and right end openings of the screw support hole (21) of the screw support seat (2) are each formed with an inverted conical surface (211) around the circumference of the screw support seat (21). The inverted conical surface (211) makes the left and right end openings of the screw support hole (21) flared. The base of the right side of the screw support seat of the compliant isolation member (4) that contacts the flange edge (42) and the base of the left side of the screw support seat that contacts the flange edge (43) respectively contact and cooperate with the inverted conical surface (211).

5. The screw and screw support mating structure of the automotive seat slide rail according to claim 2, characterized in that: The left and right end openings of the compliant isolation member (4) through hole (41) are each configured as a flared shape with the diameter increasing from the inside to the outside.

6. The screw and screw support mating structure of the automotive seat slide rail according to claim 1, characterized in that: A screw support anti-sway positioning flange edge (22) is provided at the lower part of the screw support seat (2) and around the screw support seat (2). In use, the lower surface of the screw support anti-sway positioning flange edge (22) contacts the surface of the bottom wall of the lower slide rail of the car seat facing upward.

7. The screw and screw support mating structure of the automotive seat slide rail according to claim 6, characterized in that: A screw support mounting base (23) extends from the screw support base (2) and is located below the anti-sway positioning flange edge (22) of the screw support base. A fastener hole (231) is formed at the center of the bottom of the screw support mounting base (23). The fastener hole (231) is a blind hole and has a fastener hole wall thread (2311) on the hole wall. In use, the screw support mounting base (23) extends below the lower rail of the car seat at the position corresponding to the mounting hole formed on the lower rail of the car seat and is fixed to the lower rail of the car seat by a fastener at the position corresponding to the fastener hole (231).

8. The screw and screw support mating structure of the automotive seat slide rail according to any one of claims 1 to 5, characterized in that: The longitudinal cross-sectional shape of the compliant isolation element (4) is H-shaped.

9. The screw and screw support mating structure of the automotive seat slide rail according to claim 8, characterized in that: The flexible insulating element (4) is made of rubber, nylon or polytetrafluoroethylene.

10. The screw and screw support mating structure of the automotive seat slide rail according to claim 9, characterized in that: The rubber is natural rubber or synthetic rubber; the nylon is a base aliphatic nylon, which is PA6, PA66, PA1010, PA610 or PA612.

Images