The mating structure between the speed reduction device and the upper slide rail of the car seat slide rail

Abstract

A deceleration device and its mating structure with an upper slide rail for an automotive seat slide rail belong to the technical field of automotive seat accessories. The automotive seat slide rail includes a lower slide rail; an upper slide rail forming a sliding pair with the lower slide rail; and a screw fixed within the cavity of the lower slide rail. The mating structure of the deceleration device and the upper slide rail includes a worm gear reducer. The key feature is that a left reinforcing locking plate and a right reinforcing locking plate of the worm gear reducer are fitted onto the screw. The upper parts of the left and right reinforcing locking plates of the worm gear reducer are tenon-fitted with the upper slide rail at positions corresponding to the mating cavity of the worm gear reducer. The lower front and rear sides of the left and right reinforcing locking plates of the worm gear reducer are tenon-fitted with the front and rear walls of the upper slide rail, respectively. Advantages: Simplified structure and improved installation convenience and efficiency; elimination of potential weak points in the transmission chain; ensures assembly reliability and avoids the risk of component loosening in vibrating environments.

Description

Technical Field

[0001] This utility model belongs to the technical field of automotive seat accessories, specifically relating to the cooperation structure between a deceleration device and an upper slide rail for an automotive seat slide rail. Background Technology

[0002] The core functions of car seat rails are: position adjustment, allowing the car seat to move back and forth to accommodate passengers of different heights and body types, providing a relatively comfortable and safe seating posture; and reliable locking, ensuring the seat is reliably locked in the desired position after adjustment, preventing accidental movement during vehicle movement, acceleration, braking, or collisions, thus ensuring safety. The basic operating principle of car seat rails can be summarized as a sliding-locking cycle, with the core being the interaction of two pairs of components. The core component structure includes an upper rail (also called a "moving rail") and a lower rail (also called a "fixed rail" or "static rail"). The former is fixed to the car seat frame and moves with the seat; more specifically, the upper rail drives the car seat to move forward or backward step by step. The latter is usually fixed to the vehicle floor and remains stationary. In the adjustment phase (unlocking and driving), taking the electric method as an example, the user presses the button to start the electric motor, causing the worm gear reducer to move along the screw installed in the lower slide rail cavity. Since the worm gear reducer is connected to the upper slide rail (i.e., the upper slide rail is connected to the worm gear reducer), as the worm gear reducer moves along the screw, it drives the upper slide rail and the car seat to move accordingly. Taking the manual method as an example, the user releases the control lever (also called the "handle"), and the locking mechanism resets under the action of the spring force, causing the locking teeth / pawls to re-engage in the holes / grooves of the lower slide rail, achieving mechanical hard locking. Because the aforementioned electric slide rail has a reverse self-locking characteristic when the motor stops working (i.e., the worm can drive the worm wheel, but the worm wheel cannot drive the worm in the reverse direction), this characteristic naturally locks the entire transmission system, preventing abnormal movement of the seat under force.

[0003] Electric car seat rails dominate the market due to their advantages such as convenient and labor-saving operation, precise control, easy integration, reverse self-locking, relatively compact structure, and ease of layout.

[0004] The aforementioned structure for the deceleration device and the upper slide rail is a common connection method in published Chinese patent literature. A representative example is the "Centered Horizontal Drive Type Car Seat Slide Rail Device" recommended by CN118163683A. The deceleration device in this patent includes a worm gear reducer. The worm gear reducer is supported on a positioning connector in a state of transmission engagement with the lead screw body located in the lower slide rail cavity (referred to as "fixed guide rail" in the patent). The positioning connector is generally U-shaped, with positioning connector locking plates folded outward on the upper part of each side, while the middle part of both sides is loosely fitted on the lead screw body. To connect the positioning connector, along with the worm gear reducer, to the upper slide rail, a cover plate is added. This cover plate corresponds to the top of the upper slide rail and is fixed to the positioning connector locking plate of the aforementioned positioning connector by screws acting as fasteners. The upper part of the worm gear reducer extends into a recessed groove (essentially an "upper protrusion inlet of the worm gear reducer") on the sliding guide rail (referred to in the patent as a "sliding guide rail"). The cooperation between the reduction device and the upper slide rail in this patent has the following technical problems: First, because a U-shaped positioning connector is needed to support the worm gear reducer, i.e., the transmission reduction module referred to in the patent), and a cover plate is needed to fix the positioning connector to the upper slide rail, the structure is complex and the installation is cumbersome. Specifically, the problems are as follows: First, there are many components, requiring separate machining of the positioning connector for the worm gear reducer housing and the cover plate for connecting the positioning connector, which also relies on screws as fasteners; second, the assembly process is complex, requiring the worm gear reducer to be placed on the positioning connector and then connected with the cover plate using screws, which not only increases assembly time but also increases the quality risk due to missed tightening or improper torque; third, because the positioning connector and cover plate are complex irregular shapes, the mold cost for machining such components is high; fourth, the U-shaped positioning connector has weak bending and torsional stiffness, forming a weak link in the transmission chain. To improve strength, the thickness of the positioning connector must be increased, but this will directly lead to an increase in weight, which contradicts the trend of lightweighting in automobiles; fifth, in the vibration environment of automobiles, the screws used to fix the cover plate to the positioning connector are prone to loosening, and if additional anti-loosening measures are required, the cost and process complexity will increase accordingly. Utility Model Content

[0005] The objective of this invention is to provide a combination structure of a deceleration device and an upper slide rail for an automotive seat slide rail that helps reduce the number of parts, thereby simplifying the structure and facilitating installation; significantly improves bending and torsional stiffness, thereby eliminating potential weak points in the transmission chain; eliminates the need for fasteners and ensures assembly reliability, thereby avoiding the risk of parts loosening in a vibrating environment.

[0006] The present invention achieves its objective as follows: a deceleration device and a mating structure for an upper slide rail in an automotive seat slide rail, wherein the automotive seat slide rail includes a lower slide rail; an upper slide rail, which is disposed within the lower slide rail cavity of the lower slide rail and forms a sliding pair with the lower slide rail; and a screw, which is fixed within the lower slide rail cavity at a position corresponding to the lower position of the upper slide rail cavity; the mating structure for the deceleration device and the upper slide rail includes a worm gear reducer, which is threadedly engaged with the screw, and the upper part of the worm gear reducer extends into a worm gear reducer mating cavity formed on the top wall of the upper slide rail, characterized in that... A left reinforcing snap-fit ​​plate for the worm gear reducer is loosely fitted on the screw and abuts against the left side of the worm gear reducer. A right reinforcing snap-fit ​​plate for the worm gear reducer is also loosely fitted on the screw and abuts against the right side of the worm gear reducer. The upper parts of the left and right reinforcing snap-fit ​​plates are positioned corresponding to the mating cavity of the worm gear reducer and are tenon-fitted with the upper slide rail while holding the worm gear reducer in place. The lower front and rear sides of the left and right reinforcing snap-fit ​​plates are tenon-fitted with the front wall and rear wall of the upper slide rail, respectively.

[0007] In a specific embodiment of this utility model, a left retaining cavity extends from the center of the left end of the upper cavity opening of the worm gear reducer, and a right retaining cavity extends from the center of the right end of the upper cavity opening of the worm gear reducer. On the front and rear walls of the upper slide rail, respectively corresponding to the lower front and rear sides of the left retaining cavity, there are respectively a left reinforcing retaining plate retaining hole penetrating the front and rear walls of the worm gear reducer. A locking hole is provided on the lower side and lower rear side of the worm gear reducer right reinforcement locking plate, which also penetrates the front wall and rear wall of the upper slide rail respectively. The upper end of the left reinforcement locking plate of the worm gear reducer is tenon-mortised with the left locking cavity, while the front and rear sides of the lower end are tenon-mortised with the locking hole of the left reinforcement locking plate of the worm gear reducer. The upper end of the right reinforcement locking plate of the worm gear reducer is tenon-mortised with the right locking cavity, while the front and rear sides of the lower end are tenon-mortised with the locking hole of the right reinforcement locking plate of the worm gear reducer.

[0008] In another specific embodiment of this utility model, a left reinforcing plate screw hole is formed in the middle of the height direction of the left reinforcing plate of the worm gear reducer. The screw is loosely fitted onto the screw. A tenon is formed at the upper end of the left reinforcing plate of the worm gear reducer, and an outwardly protruding foot is formed on the front and rear sides of the lower end. The tenon of the left reinforcing plate of the worm gear reducer is mortised and tenoned with the left retaining cavity, and the foot of the left reinforcing plate of the worm gear reducer is engaged with the left reinforcing plate of the worm gear reducer. The plate clamping feet are tenon-and-mortise fitted; a right reinforcing clamping plate screw hole is opened in the middle of the height direction of the right reinforcing clamping plate of the worm gear reducer, and the right reinforcing clamping plate screw hole is loosely fitted on the screw. A worm gear reducer right reinforcing clamping plate tenon is formed at the upper end of the worm gear reducer right reinforcing clamping plate, and an outwardly protruding worm gear reducer right reinforcing clamping plate clamping foot is formed on the front and rear sides of the lower end. The worm gear reducer right reinforcing clamping plate tenon is tenon-and-mortise fitted with the right clamping cavity, and the worm gear reducer right reinforcing clamping plate clamping foot is tenon-and-mortise fitted with the worm gear reducer right reinforcing clamping plate clamping foot hole.

[0009] In another specific embodiment of this utility model, the left reinforcing snap-fit ​​plate and the right reinforcing snap-fit ​​plate of the worm gear reducer are each arranged in a double-convex shape resembling Chinese characters stacked from bottom to top.

[0010] In another specific embodiment of this utility model, the lower slide rail is fixed to the vehicle floor by fasteners in use. The upper front part of the lower slide rail along its length direction is folded towards the lower slide rail cavity to form an inwardly folded edge with an n-shaped cross-section. Similarly, the upper rear part of the lower slide rail along its length direction is folded towards the lower slide rail cavity to form an inwardly folded edge with an n-shaped cross-section. The lower front part of the upper slide rail along its length direction is folded outward to form an outwardly folded edge with a U-shaped cross-section. The lower rear part in the length direction also folds outward to form an outer folded edge of the upper slide rail with a U-shaped cross-section. The outer folded edge of the upper slide rail and the inner folded edge of the lower slide rail cooperate with each other. A front clearance elimination device is provided in the space between the outer wall of the outer folded edge of the upper slide rail and the inner wall of the inner folded edge of the lower slide rail. The outer folded edge of the upper slide rail and the inner folded edge of the lower slide rail cooperate with each other. A rear clearance elimination device is provided in the space between the outer wall of the outer folded edge of the upper slide rail and the inner wall of the inner folded edge of the lower slide rail. The front and rear clearance elimination devices of the slide rail make the upper slide rail and the lower slide rail form a sliding pair.

[0011] In another specific embodiment of this utility model, a screw thread seat is provided at the left end of the screw, and the screw thread seat is fixed to the left end of the lower slide rail cavity by a screw thread seat fixing screw. A screw fixing seat is provided at the right end of the screw, and the screw fixing seat is fixed to the right end of the lower slide rail cavity by a screw fixing seat screw. A screw locking nut is screwed onto the right end of the screw that protrudes from the right side of the screw fixing seat.

[0012] In a further specific embodiment of this utility model, a seat frame fixing stud is fixed on the top wall of the upper slide rail, at both the left and right ends. In use, the seat frame fixing stud is fixedly connected to the seat frame of the car seat. A motor bracket fixing hole is provided on the top wall of the upper slide rail, at the left and right positions corresponding to the worm gear reducer cavity.

[0013] In a further specific embodiment of this utility model, the upper part of the worm gear reducer protrudes from the top wall of the upper slide rail while being tightly fitted with the worm gear reducer's mating cavity; the left and right reinforcing locking plates of the worm gear reducer protrude from the top wall of the upper slide rail while being respectively fitted with the left and right locking cavities via tenon and mortise joints.

[0014] In yet another specific embodiment of this utility model, the front backlash elimination device of the slide rail includes a front ball bearing frame and front balls. A set of front balls is spaced apart at the upper and lower parts of the left and right ends of the front ball bearing frame, and the front ball bearing frame together with the front balls is disposed in the space between the outer wall of the front outer folded edge of the upper slide rail and the inner wall of the front inner folded edge of the lower slide rail. The rear backlash elimination device of the slide rail includes a rear ball bearing frame and rear balls. A set of rear balls is spaced apart at the upper and lower parts of the left and right ends of the rear ball bearing frame, and the rear ball bearing frame together with the rear balls is disposed in the space between the outer wall of the rear outer folded edge of the upper slide rail and the inner wall of the rear inner folded edge of the lower slide rail.

[0015] The technical solution provided by this utility model utilizes left and right reinforcing snap-fit ​​plates of the worm gear reducer, which, while clamping the worm gear reducer, are tenon-and-mortise engaged with the upper slide rail. Furthermore, the upper part of the worm gear reducer is tightly fitted with its mating cavity. Therefore, compared to existing technologies, this significantly reduces the number of parts, simplifies the structure, and enhances the convenience and efficiency of installation. It also maximizes the bending and torsional stiffness of the left and right reinforcing snap-fit ​​plates and simultaneously improves the stiffness of the upper slide rail, eliminating potential weak points in the transmission chain. Since there is no need for screws or other fasteners to install the left and right reinforcing snap-fit ​​plates, assembly reliability is ensured, avoiding the risk of parts loosening in vibrating environments. Attached Figure Description

[0016] Figure 1 This is an assembly structure diagram of the present invention; Figure 2 for Figure 1 A schematic diagram of the assembled assembly; Figure 3 For the present utility model Figure 2 A schematic diagram showing the left side view.

[0017] In the diagram: 1. Lower slide rail, 11. Lower slide rail cavity, 12. Lower slide rail front inner fold, 13. Lower slide rail rear inner fold; 2. Upper slide rail, 21. Upper slide rail cavity, 211. Worm gear reducer mating cavity, 2111. Left locking cavity, 2112. Right locking cavity, 212. Worm gear reducer left reinforcing locking plate locking foot hole, 213. Worm gear reducer right reinforcing locking plate locking foot hole, 23. Upper slide rail front outer fold, 24. Upper slide rail rear outer fold, 25. Seat frame fixing stud, 26. Motor frame fixing hole; 3. Screw, 31. Screw threaded seat, 311. Screw threaded seat fixing screw, 32. Screw fixing seat, 321. Screw fixing seat screw, 33. Screw locking nut; 4. Worm gear reducer, 41. 5. Worm gear connecting hole; 6. Left reinforcing snap-fit ​​plate of worm gear reducer; 7. Left reinforcing snap-fit ​​plate screw sleeve hole; 8. Tenon of left reinforcing snap-fit ​​plate of worm gear reducer; 9. Clip of left reinforcing snap-fit ​​plate of worm gear reducer; 10. Right reinforcing snap-fit ​​plate of worm gear reducer; 11. Tenon of right reinforcing snap-fit ​​plate of right reinforcing snap-fit ​​plate; 12. Clip of right reinforcing snap-fit ​​plate of worm gear reducer; 13. Clip of right reinforcing snap-fit ​​plate of worm gear reducer; 14. Front backlash elimination device of slide rail; 15. Front ball bearing; 16. Front ball bearing; 17. Rear backlash elimination device of slide rail; 18. Rear ball bearing; 19. Rear ball bearing; 10. Rear ball bearing. Detailed Implementation

[0018] In order to better understand the technical essence and beneficial effects of this utility model, the applicant provides a detailed description 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.

[0019] 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 of the object are taken as examples, and therefore should not be construed as a special limitation on the technical solution provided by this utility model.

[0020] Please see Figure 1 and Figure 2The diagram illustrates the structural system of an automotive seat slide rail, including a lower slide rail 1, an upper slide rail 2 disposed within the lower slide rail cavity 11 of the lower slide rail 1 and forming a sliding pair with the lower slide rail 1, a screw 3 fixed within the lower slide rail cavity 11 at a position corresponding to the lower slide rail cavity 21 of the upper slide rail 2, and a worm gear reducer 4 threadedly engaged with the screw 3, the upper part of which extends into a worm gear reducer engagement cavity 211 formed on the top wall of the upper slide rail 2.

[0021] The key technical points of the technical solution provided by this utility model are as follows: a left reinforcing locking plate 5 for the worm gear reducer is loosely fitted on the aforementioned screw 3 while it is in contact with the left side of the worm gear reducer 4; and a right reinforcing locking plate 6 for the worm gear reducer is loosely fitted on the screw 3 while it is in contact with the right side of the worm gear reducer 4. The upper parts of the left and right reinforcing locking plates 5 and 6 are in mortise and tenon joint with the aforementioned upper slide rail 2 at the positions corresponding to the aforementioned worm gear reducer mating cavity 211 and while the worm gear reducer 4 is being held. The lower front and rear sides of the left and right reinforcing locking plates 5 and 6 are respectively in mortise and tenon joint with the upper slide rail front wall and the upper slide rail rear wall of the upper slide rail 2.

[0022] The concept of "empty sleeve" mentioned above refers to the fact that the left and right reinforcing plates 5 and 6 of the worm gear reducer do not contact the screw 3.

[0023] Please pay attention. Figure 1 A left retaining cavity 2111 extends from the center of the left end of the upper cavity opening of the aforementioned worm gear reducer cavity 211, while a right retaining cavity 2112 extends from the center of the right end of the upper cavity opening of the worm gear reducer cavity 211. On the front and rear walls of the aforementioned upper slide rail 2, respectively corresponding to the lower front and rear sides of the left retaining cavity 2111, there are worm gear reducer left reinforcing retaining plate retaining holes 212 penetrating the front and rear walls of the upper slide rail. Each of the following locations has a worm gear reducer right reinforcement locking plate locking hole 213, which is also provided at the lower rear side, penetrating the front wall of the upper slide rail and the rear wall of the upper slide rail respectively; the upper end of the aforementioned worm gear reducer left reinforcement locking plate 5 is tenon-fitted with the aforementioned left locking cavity 2111, while the front and rear sides of the lower end are tenon-fitted with the aforementioned worm gear reducer left reinforcement locking plate locking hole 212; the upper end of the aforementioned worm gear reducer right reinforcement locking plate 6 is tenon-fitted with the aforementioned right locking cavity 2112, while the front and rear sides of the lower end are tenon-fitted with the aforementioned worm gear reducer right reinforcement locking plate locking hole 213.

[0024] A left reinforcing plate screw hole 51 is provided at the height of the left reinforcing plate 5 of the aforementioned worm gear reducer. The left reinforcing plate screw hole 51 is loosely fitted on the aforementioned screw 3. A worm gear reducer left reinforcing plate tenon 52 is formed at the upper end of the worm gear reducer left reinforcing plate 5, while a worm gear reducer left reinforcing plate locking foot 53 protruding outward is formed on the front and rear sides of the lower end. The worm gear reducer left reinforcing plate tenon 52 is mortised and tenoned with the aforementioned left locking cavity 2111, and the worm gear reducer left reinforcing plate locking foot 53 is mortised and tenoned with the aforementioned worm gear reducer left reinforcing plate locking foot hole 212. A right reinforcing plate screw hole 61 is provided in the middle of the height direction of the right reinforcing plate 6 of the aforementioned worm gear reducer. The right reinforcing plate screw hole 61 is loosely fitted on the aforementioned screw 3. A worm gear reducer right reinforcing plate tenon 62 is formed at the upper end of the worm gear reducer right reinforcing plate 6, while a worm gear reducer right reinforcing plate locking foot 63 protruding outward is formed on the front and rear sides of the lower end. The worm gear reducer right reinforcing plate tenon 62 is tenon-mortised with the aforementioned right locking cavity 2112, and the worm gear reducer right reinforcing plate locking foot 63 is tenon-mortised with the aforementioned worm gear reducer right reinforcing plate locking foot hole 213.

[0025] Depend on Figure 2 As can be seen from the diagram, as a preferred solution, in order to fully ensure the foolproof fixing effect of the left and right reinforcing locking plate tenons 52 and 62 of the worm gear reducer and the upper slide rail 2 at the positions of the left and right locking cavities 2111 and 2112 respectively, welding can also be used for reinforcement.

[0026] Based on the above explanation and in combination Figure 1 and Figure 2 As can be seen from the diagram, since the aforementioned left and right retaining cavities 2111 and 2112 are each connected to the worm gear reducer's mating cavity 211, the shape of the left retaining cavity 2111 is roughly [U-shaped], while the shape of the right retaining cavity 2112 is roughly [U-shaped], so that the aforementioned left and right reinforcing retaining plate tenons 52 and 62 of the worm gear reducer can be reliably mortised and tenoned together. The upper part of the worm gear reducer 4 tends to be mortised and tenoned with the worm gear reducer's mating cavity 211 (also known as "tight fit"). In addition, it can be determined without a doubt that the shape and size of the aforementioned left and right reinforcing retaining plate retaining foot holes 212 and 213 of the worm gear reducer are adapted to the left and right reinforcing retaining plate retaining feet 53 and 63 of the worm gear reducer, respectively.

[0027] Depend on Figure 1As shown, the aforementioned left reinforcing connecting plate 5 and right reinforcing connecting plate 6 of the worm gear reducer each have a double-convex Chinese character structure stacked from bottom to top. The specific meaning of the aforementioned double-convex character structure is that the left and right reinforcing connecting plates 5 and 6 of the worm gear reducer each have two pairs of shoulders (also called "two pairs of steps") from top to bottom.

[0028] Please see Figure 3 And combined Figure 1 and Figure 2 The aforementioned lower slide rail 1 is fixed to the vehicle floor by fasteners during use. The upper front part of the lower slide rail 1 along its length is folded towards the lower slide rail cavity 11 to form an inwardly folded front edge 12 with an n-shaped cross-section. Similarly, the upper rear part of the lower slide rail 1 along its length is folded towards the lower slide rail cavity 11 to form an inwardly folded rear edge 13 with an n-shaped cross-section. The lower front part of the aforementioned upper slide rail 2 (i.e., the lower part of the aforementioned upper slide rail front wall) folds outward to form an outwardly folded front edge 23 with a U-shaped cross-section. The lower rear part of the upper slide rail 2 (i.e., the lower part of the aforementioned upper slide rail front wall) folds outward to form an outwardly folded front edge 23 with a U-shaped cross-section. The lower part of the rear wall of the upper slide rail also folds outward to form an outer rear folded edge 24 of the upper slide rail with a U-shaped cross-section. The outer front folded edge 23 of the upper slide rail and the inner front folded edge 12 of the lower slide rail cooperate with each other. A front clearance elimination device 7 is provided in the space between the outer wall of the outer front folded edge 23 of the upper slide rail and the inner wall of the inner front folded edge 12 of the lower slide rail. The outer rear folded edge 24 of the upper slide rail and the inner rear folded edge 13 of the lower slide rail cooperate with each other. A rear clearance elimination device 8 is provided in the space between the outer wall of the outer rear folded edge 24 of the upper slide rail and the inner wall of the inner rear folded edge 13 of the lower slide rail. The front and rear clearance elimination devices 7 and 8 make the upper slide rail 2 and the lower slide rail 1 form a sliding pair.

[0029] Depend on Figure 1 As shown, the left end of the aforementioned screw 3 is provided with a screw thread seat 31 that is generally L-shaped. The screw thread seat 31 is fixed to the left end of the aforementioned lower slide rail 1 in the aforementioned lower slide rail cavity 11 by a screw thread seat fixing screw 311. The right end of the screw 3 is provided with a screw fixing seat 32. The screw fixing seat 32 is fixed to the right end of the aforementioned lower slide rail 1 in the aforementioned lower slide rail cavity 11 by a screw fixing seat screw 321. A screw locking nut 33 is screwed onto the right end of the screw 3 that protrudes from the right side of the screw fixing seat 32.

[0030] On the top wall of the aforementioned upper slide rail 2, at both the left and right ends, there are seat frame fixing studs 25. In use, the seat frame fixing studs 25 are fixedly connected to the seat frame of the car seat. On the top wall of the upper slide rail 2, at the left and right positions corresponding to the aforementioned worm gear reducer cavity 211, there are motor bracket fixing holes 26.

[0031] Depend on Figure 2 As shown, the upper part of the aforementioned worm gear reducer 4 protrudes from the top wall of the aforementioned upper slide rail 2 in a state of tight fit with the aforementioned worm gear reducer mating cavity 211; the left and right reinforcing locking plate tenons 52 and 62 of the aforementioned worm gear reducer protrude from the top wall of the upper slide rail 2 in a state of mortise and tenon fit with the aforementioned left and right locking cavities 2111 and 2112 respectively.

[0032] See the key points Figure 1 and Figure 3 The aforementioned slide rail front backlash elimination device 7 includes a front ball cage 71 (also referred to as a "front ball retainer") and front balls 72. A set of front balls 72 is spaced apart at the upper and lower parts of the left and right ends of the front ball cage 71, and the front ball cage 71 and the front balls 72 are disposed in the space between the outer wall of the front outer folded edge 23 of the aforementioned upper slide rail and the inner wall of the front inner folded edge 12 of the lower slide rail. The aforementioned slide rail rear backlash elimination device 8 includes a rear ball cage 81 (also referred to as a "rear ball retainer") and rear balls 82. A set of rear balls 82 is spaced apart at the upper and lower parts of the left and right ends of the rear ball cage 81, and the rear ball cage 81 and the rear balls 82 are disposed in the space between the outer wall of the rear outer folded edge 24 of the aforementioned upper slide rail and the inner wall of the rear inner folded edge 13 of the lower slide rail.

[0033] Based on professional knowledge, car seat slide rails are used in pairs. That is to say, in actual use, the present invention consists of… Figures 1 to 3 The structures shown are identical in a pair. Therefore, although the applicant has only provided a detailed description of one car seat slide rail above, it will not cause confusion in understanding the practical use of this utility model.

[0034] Then, based on professional knowledge, a motor frame (not shown in the figure) is fixed between the upper slide rails 21 of the parallel car seat slide rail structure system and at the position corresponding to the aforementioned motor frame fixing holes 26 (a pair). A motor with forward and reverse functions is installed on the motor frame. The motor shaft of the motor with two motor shaft heads extends to the worm gear connecting hole 41. The motor shaft drives the worm in the worm gear reducer 4, and the worm drives the worm wheel in the worm gear reducer 4. This causes the aforementioned worm wheel, which is threaded with the screw 3, to move on the screw 3. As a result, the entire worm gear reducer 4 and the left and right reinforcing snap plates 5 and 6 of the worm gear reducer move together while driving the upper slide rail 2. The upper slide rail 2 drives the car seat to move.

[0035] The applicant should note that since the worm gear reducer 4 can be the structure disclosed in CN118163683A or other similar structures (the former is chosen in this embodiment), the applicant has not elaborated on it. Furthermore, since the mating relationship between the upper and lower slide rails 2 and 1 is also well-known in the art, the applicant has not provided a more detailed explanation.

[0036] 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 deceleration device and upper slide rail cooperation structure for an automotive seat slide rail, the automotive seat slide rail comprising a lower slide rail (1); an upper slide rail (2), the upper slide rail (2) being disposed within the lower slide rail cavity (11) of the lower slide rail (1) and forming a sliding pair with the lower slide rail (1); a screw (3), the screw (3) being fixed within the lower slide rail cavity (11) at a position corresponding to the lower slide rail cavity (21) of the upper slide rail (2); the deceleration device and upper slide rail cooperation structure comprising a worm gear reducer (4), the worm gear reducer (4) being threadedly engaged with the screw (3) and the upper part of the worm gear reducer (4) extending into the worm gear reducer cooperation cavity (211) opened on the top wall of the upper slide rail (2), characterized in that: A left reinforcing snap-fit ​​plate (5) for the worm gear reducer is loosely fitted on the screw (3) while it is in contact with the left side of the worm gear reducer (4), and a right reinforcing snap-fit ​​plate (6) for the worm gear reducer is loosely fitted on the screw (3) while it is in contact with the right side of the worm gear reducer (4). The upper part of the left and right reinforcing snap-fit ​​plates (5, 6) is in the position corresponding to the worm gear reducer mating cavity (211) and is in the state of holding the worm gear reducer (4) in a tenon-and-mortise fit with the upper slide rail (2), while the lower front and rear sides of the left and right reinforcing snap-fit ​​plates (5, 6) are in tenon-and-mortise fit with the upper slide rail front wall and the upper slide rail rear wall of the upper slide rail (2), respectively.

2. The cooperation structure between the deceleration device and the upper slide rail of the automobile seat slide rail according to claim 1, characterized in that: A left retaining cavity (2111) extends from the center of the left end of the upper cavity opening of the worm gear reducer (211), while a right retaining cavity (2112) extends from the center of the right end of the upper cavity opening of the worm gear reducer (211). On the upper slide rail (2), on the front and rear walls, respectively corresponding to the lower front and rear sides of the left retaining cavity (2111), there are worm gear reducer left reinforcing retaining plate retaining holes (212) penetrating the front and rear walls of the upper slide rail. Each of the following locations has a worm gear reducer right reinforcement snap-fit ​​plate snap-fit ​​hole (213) that passes through the front wall of the upper slide rail and the rear wall of the upper slide rail respectively; the upper end of the worm gear reducer left reinforcement snap-fit ​​plate (5) is tenon-fitted with the left snap-fit ​​cavity (2111), and the front and rear sides of the lower end are tenon-fitted with the worm gear reducer left reinforcement snap-fit ​​plate snap-fit ​​hole (212); the upper end of the worm gear reducer right reinforcement snap-fit ​​plate (6) is tenon-fitted with the right snap-fit ​​cavity (2112), and the front and rear sides of the lower end are tenon-fitted with the worm gear reducer right reinforcement snap-fit ​​plate snap-fit ​​hole (213).

3. The cooperation structure between the deceleration device and the upper slide rail of the automobile seat slide rail according to claim 2, characterized in that: A left reinforcing plate screw hole (51) is opened in the middle of the height direction of the left reinforcing plate (5) of the worm gear reducer. The left reinforcing plate screw hole (51) is loosely fitted on the screw (3). A worm gear reducer left reinforcing plate tenon (52) is formed at the upper end of the worm gear reducer left reinforcing plate (5), and a worm gear reducer left reinforcing plate foot (53) is formed on the front and rear sides of the lower end. The worm gear reducer left reinforcing plate tenon (52) is tenon-mortised with the left clamping cavity (2111), and the worm gear reducer left reinforcing plate foot (53) is tenon-mortised with the worm gear reducer left reinforcing plate foot hole (212). A right reinforcing plate screw hole (61) is provided in the middle of the height direction of the right reinforcing plate (6) of the worm gear reducer. The right reinforcing plate screw hole (61) is loosely fitted on the screw (3). A worm gear reducer right reinforcing plate tenon (62) is formed at the upper end of the worm gear reducer right reinforcing plate (6), and a worm gear reducer right reinforcing plate foot (63) protruding outward is formed on the front and rear sides of the lower end. The worm gear reducer right reinforcing plate tenon (62) is tenon-mortised with the right clamping cavity (2112), and the worm gear reducer right reinforcing plate foot (63) is tenon-mortised with the worm gear reducer right reinforcing plate foot hole (213).

4. The cooperation structure between the deceleration device and the upper slide rail of the automobile seat slide rail according to claim 1, 2, or 3, characterized in that: The left reinforcing snap-fit ​​plate (5) and the right reinforcing snap-fit ​​plate (6) of the worm gear reducer each have a double-convex Chinese character structure stacked from bottom to top.

5. The cooperation structure between the deceleration device and the upper slide rail of the automobile seat slide rail according to claim 1, characterized in that: The lower slide rail (1) is fixed to the vehicle floor by fasteners in use. The upper front part of the lower slide rail (1) along its length direction is folded towards the lower slide rail cavity (11) to form an inwardly folded edge (12) with an n-shaped cross-section. Similarly, the upper rear part of the lower slide rail (1) along its length direction is folded towards the lower slide rail cavity (11) to form an inwardly folded edge (13) with an n-shaped cross-section. The lower front part of the upper slide rail (2) along its length direction is folded outward to form an outwardly folded edge (23) with a U-shaped cross-section. The lower rear part of the upper slide rail (2) along its length direction is also folded outward to form a transversely folded edge. The upper slide rail has a U-shaped outer rear fold (24), the upper slide rail has a front outer fold (23) and the lower slide rail has a front inner fold (12) that cooperate with each other, and a slide rail front clearance elimination device (7) is provided in the space between the outer wall of the upper slide rail front outer fold (23) and the inner wall of the lower slide rail front inner fold (12). The upper slide rail has a rear outer fold (24) and the lower slide rail has a rear inner fold (13) that cooperate with each other, and a slide rail rear clearance elimination device (8) is provided in the space between the outer wall of the upper slide rail rear outer fold (24) and the inner wall of the lower slide rail rear inner fold (13). The slide rail front clearance elimination device (7) and the slide rail rear clearance elimination device (8) make the upper slide rail (2) and the lower slide rail (1) form a sliding pair.

6. The deceleration device of the automobile seat slide rail and the matching structure of the upper rail according to claim 1, characterized in that: A screw thread seat (31) is provided at the left end of the screw (3). The screw thread seat (31) is fixed to the left end of the lower slide rail (1) in the lower slide rail cavity (11) by a screw thread seat fixing screw (311). A screw fixing seat (32) is provided at the right end of the screw (3). The screw fixing seat (32) is fixed to the right end of the lower slide rail (1) in the lower slide rail cavity (11) by a screw fixing seat screw (321). A screw locking nut (33) is screwed onto the end of the screw (3) that protrudes from the right side of the screw fixing seat (32).

7. The deceleration device of the automobile seat slide rail and the matching structure of the upper rail according to claim 1, characterized in that: On the top wall of the upper slide rail (2), at the left and right ends, there are seat frame fixing studs (25). In use, the seat frame fixing studs (25) are fixedly connected to the seat frame of the car seat. On the top wall of the upper slide rail (2), there are motor frame fixing holes (26) on the left and right sides corresponding to the worm gear reducer cavity (211).

8. The cooperation structure between the deceleration device and the upper slide rail of the automobile seat slide rail according to claim 3, characterized in that: The upper part of the worm gear reducer (4) protrudes from the top wall of the upper slide rail (2) in a state of tight fit with the worm gear reducer cavity (211); the left reinforcing snap plate tenon (52) and the right reinforcing snap plate tenon (62) of the worm gear reducer protrude from the top wall of the upper slide rail (2) in a state of mortise and tenon fit with the left snap cavity (2111) and the right snap cavity (2112) respectively.

9. The cooperation structure between the deceleration device and the upper slide rail of the automobile seat slide rail according to claim 5, characterized in that: The slide rail front backlash elimination device (7) includes a front ball frame (71) and front balls (72). A set of front balls (72) is spaced apart on the upper and lower parts of the left and right ends of the front ball frame (71), and the front ball frame (71) together with the front balls (72) is located in the space between the outer wall of the front outer fold (23) of the upper slide rail and the inner wall of the front inner fold (12) of the lower slide rail. The slide rail rear backlash elimination device (8) includes a rear ball frame (81) and rear balls (82). A set of rear balls (82) is spaced apart on the upper and lower parts of the left and right ends of the rear ball frame (81), and the rear ball frame (81) together with the rear balls (82) is located in the space between the outer wall of the rear outer fold (24) of the upper slide rail and the inner wall of the rear inner fold (13) of the lower slide rail.

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