An angle-adjustable automobile table plate framework structure

Abstract

The utility model discloses an adjustable angle's car table board skeleton structure, include: skeleton, the upper link and lower link are hinged on the skeleton, the upper link and lower link common hinged have mounting seat one end away from the skeleton, be provided with driving source on the skeleton, driving source is connected with screw rod, driving source drives screw rod rotation, and the screw rod is connected with the wedge limit pin through the nut, and the wedge limit pin is slidably connected with the skeleton, thereby driving source controls the linear motion of wedge limit pin through screw rod, and the wedge limit pin is set up with the wedge limit surface to the side of upper link, and the wedge limit surface is slidably connected with the side of upper link close to the skeleton, through above -mentioned mode, the utility model can increase stable reliable electric angle adjusting function for car manual table board under the premise of not increasing structure complexity and occupying space obviously, and realize bilateral synchronization, continuous stepless and have high bearing capacity's table board angle adjustment.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat technology, and in particular to an adjustable angle automotive table frame structure. Background Technology

[0002] With the continuous development of the automotive industry and autonomous driving technology, the function of the car cabin is no longer limited to transportation; it is gradually evolving into a mobile living space that meets the needs of various scenarios. Against this backdrop, folding tables providing convenience for rear passengers have become a common feature in many car models, with their most common placement being the backrest of the front seats. Most existing tables of this type use a linkage structure to unfold and fold, but their function is relatively simple, generally suffering from a fixed or inconveniently adjustable angle after unfolding. For example, a common solution only has a single-angle mechanical limit after unfolding, which means that when the front seat backrest angle is adjusted, the table will move in tandem, unable to be adjusted independently of the seat, limiting the flexibility of use, as illustrated in Chinese patent application CN113942440A.

[0003] To enable tabletop angle adjustment, several improvements have been proposed in existing technologies: One option is to use an electrically operated tabletop, such as the solutions disclosed in Chinese patent application CN119283752A and Chinese patent CN222271877U. These are driven by a geared motor, but the motor and its gearbox need to bear the entire load of the tabletop to achieve locking, which requires high gear strength, resulting in a large motor size and excessive space occupation. The second type is a manually adjustable table with multiple gears, such as the solution disclosed in Chinese Patent No. CN118636765B. Its angle adjustment is a non-continuous gear type, which cannot achieve stepless adjustment. In addition, the adjustment structures on both sides lack linkage, which may pose a risk of inconsistent adjustment angles. Utility Model Content

[0004] The main technical problem solved by this utility model is to provide an adjustable car table frame structure that can add a stable and reliable electric angle adjustment function to the manual car table without significantly increasing the structural complexity and space occupation, and realize the table angle adjustment with synchronous, continuous stepless adjustment on both sides and high load-bearing capacity.

[0005] To solve the above-mentioned technical problems, the present invention provides a technical solution: an adjustable-angle car table frame structure, comprising: a frame, an upper connecting rod and a lower connecting rod hinged to the frame, the ends of the upper and lower connecting rods away from the frame being hinged to a mounting base, a drive source on the frame, a lead screw connected to the drive source, the drive source driving the lead screw to rotate, the lead screw being connected to a wedge-shaped limiting pin via a nut, the wedge-shaped limiting pin slidingly engaging with the frame, thereby the drive source controlling the linear movement of the wedge-shaped limiting pin via the lead screw, the wedge-shaped limiting pin having a wedge-shaped limiting surface on the side facing the upper connecting rod, the wedge-shaped limiting surface slidingly engaging with the side of the upper connecting rod near the frame, the linear movement of the wedge-shaped limiting pin changing the limit position of the wedge-shaped limiting pin on the upper connecting rod, thereby achieving continuous adjustment of the table angle.

[0006] Preferably, both sides of the frame are connected to an upper connecting rod and a lower connecting rod. The lead screw includes a left-hand lead screw and a right-hand lead screw connected to both sides of the drive source and driven by the drive source to rotate synchronously. The wedge-shaped limiting pin includes a left wedge-shaped limiting pin and a right wedge-shaped limiting pin. Both the left wedge-shaped limiting pin and the right wedge-shaped limiting pin have wedge-shaped limiting surfaces that cooperate with the upper connecting rod. The nut includes a left nut and a right nut. The left nut and the right nut are respectively sleeved on the left-hand lead screw and the right-hand lead screw and are respectively connected to the left wedge-shaped limiting pin and the right wedge-shaped limiting pin. When the drive source drives the left-hand lead screw and the right-hand lead screw to rotate, it causes the left nut and the right nut to move in opposite directions or away from each other, which in turn pushes the left wedge-shaped limit pin and the right wedge-shaped limit pin to slide in opposite directions on the frame. Thus, the left wedge-shaped limit pin and the right wedge-shaped limit pin extend or retract, thereby continuously changing the support limit position of the upper connecting rod, so as to realize the continuous adjustment of the table angle.

[0007] Preferably, guide sleeves are fixedly connected to both sides of the skeleton to guide the left wedge-shaped limiting pin and the right wedge-shaped limiting pin to move in a straight line.

[0008] Preferably, the drive source is a dual-output shaft motor.

[0009] Preferably, the driving source is a manually operated component, which is a handwheel or knob, and the manually operated component is connected to the lead screw via a shaft or gear.

[0010] Preferably, the taper of the wedge-shaped limiting surface is ≤10°.

[0011] Preferably, the lead angle of the lead screw is ≤10°.

[0012] The beneficial effects of this utility model are as follows: Through the cooperation of the lead screw and nut transmission and the wedge-shaped limiting surface, continuous stepless adjustment of the tabletop angle is achieved, meeting the personalized needs of users for different usage scenarios. Its symmetrical double lead screw and wedge-shaped limiting pin design, driven synchronously by a single drive source, ensures the consistency of angle adjustment on both sides of the tabletop, effectively avoiding jamming or tilting problems caused by asynchronous adjustment on one side. Most importantly, the double self-locking design of the wedge-shaped limiting surface and the lead screw pair ensures reliable mechanical locking of the tabletop after adjustment to any angle. External loads are mainly borne by the robust frame and guide sleeve, rather than acting on the transmission system and drive source. This not only significantly improves the structure's load-bearing capacity and durability but also allows for the selection of a smaller, more compact drive source, effectively saving valuable vehicle interior space. This structure successfully integrates the comprehensive advantages of high load-bearing capacity, reliable limiting, smooth stepless adjustment, and compact layout within a limited space. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model after removing the frame and after installation; Figure 3 This is a schematic diagram showing the positional relationship between the upper connecting rod and the wedge-shaped limiting pin of this utility model.

[0014] The components in the attached diagram are labeled as follows: 1. Frame; 2. Upper connecting rod; 3. Lower connecting rod; 4. Drive source; 51. Left-hand lead screw; 52. Right-hand lead screw; 61. Left nut; 62. Right nut; 71. Left wedge-shaped limiting pin; 72. Right wedge-shaped limiting pin; 73. Wedge-shaped limiting surface; 8. Guide sleeve; 9. Mounting base. Detailed Implementation

[0015] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0016] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0018] 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0020] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0021] Unless otherwise specified, physical quantities in formulas should be understood as basic quantities of SI base units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0022] Example: refer to Figure 1 and Figure 2 An adjustable-angle car table frame structure 1 includes: a frame 1, with an upper connecting rod 2 and a lower connecting rod 3 hinged to the frame 1. The ends of the upper connecting rod 2 and the lower connecting rod 3 away from the frame 1 are jointly hinged to a mounting base 9. The frame 1 can be bolted to a mounting structure such as a seat back via the mounting base 9, thereby supporting the position of the frame 1. A drive source 4 is bolted to the middle position of the frame 1. The drive source 4 is connected to a lead screw, which drives the lead screw to rotate. The lead screw is connected to a wedge-shaped limiting pin via a nut. The wedge-shaped limiting pin slides against the frame 1, thereby controlling the position of the nut by rotating the lead screw, thus controlling the linear movement of the wedge-shaped limiting pin, and consequently controlling the degree of extension and retraction of the wedge-shaped limiting pin. A wedge-shaped limiting surface 73 is provided on the side of the wedge-shaped limiting pin facing the upper connecting rod 2. The wedge-shaped limiting surface 73 is a continuous wedge structure. The wedge-shaped limiting surface 73 slides in contact with the side of the upper connecting rod 2 closest to the frame 1. By changing the linear movement of the wedge-shaped limiting pin and the inclined surface on the wedge-shaped limiting surface 73, the limit position of the wedge-shaped limiting pin on the upper connecting rod 2 is changed, thereby realizing continuous adjustment of the tabletop angle. The wedge-shaped limiting pin achieves unidirectional limiting, which is reliable and has a strong load-bearing capacity.

[0023] refer to Figures 1-3The frame 1 has upper connecting rods 2 and lower connecting rods 3 connected to both sides. The lead screw includes a left-hand lead screw 51 and a right-hand lead screw 52 connected to both sides of the drive source 4 and driven by the drive source 4 to rotate synchronously. The wedge-shaped limiting pin includes a left wedge-shaped limiting pin 71 and a right wedge-shaped limiting pin 72. Both the left wedge-shaped limiting pin 71 and the right wedge-shaped limiting pin 72 have wedge-shaped limiting surfaces 73 that cooperate with the upper connecting rod 2. The nut includes a left nut 61 and a right nut 62, which are respectively fitted onto the left-hand lead screw 51 and the right-hand lead screw 52. The lead screw 52 is fixedly connected to the left wedge-shaped limiting pin 71 and the right wedge-shaped limiting pin 72 respectively. When the drive source 4 drives the left-hand lead screw 51 and the right-hand lead screw 52 to rotate, it drives the left nut 61 and the right nut 62 to move in opposite directions or away from each other, thereby pushing the left wedge-shaped limiting pin 71 and the right wedge-shaped limiting pin 72 to slide in opposite directions on the frame 1. This adjusts the degree of extension or retraction of the left wedge-shaped limiting pin 71 and the right wedge-shaped limiting pin 72, thereby continuously changing the support limit position of the upper connecting rod 2 to achieve stepless continuous adjustment of the table angle.

[0024] refer to Figure 1 and Figure 2 Guide sleeves 8 are fixedly connected to both sides of the frame 1. The guide sleeves 8 are used to guide the left wedge-shaped limiting pin 71 and the right wedge-shaped limiting pin 72 to move in a straight line, effectively preventing deflection and jamming, and further improving the smoothness of system operation and structural durability. The overall structure achieves high load-bearing capacity, reliable limiting and smooth stepless adjustment functions within a limited space.

[0025] refer to Figures 1-3 The frame 1, through the upper connecting rod 2, lower connecting rod 3, and mounting base 9, forms a stable four-bar linkage, ensuring smooth movement during the unfolding and retraction of the tabletop. The mounting base 9 serves as the connection interface with the car seat back, using bolts to reliably fix the frame 1. The angle adjustment function of this structure relies on a complete mechanical transmission path. Specifically, the rotational motion output from the drive source 4 is first transmitted to the lead screw, causing the mating nut to move axially, which in turn pushes the wedge-shaped limiting pin to move linearly along a set direction. By controlling the rotation direction and angle of the drive source 4, the extension or retraction position of the wedge-shaped limiting pin can be precisely controlled. The wedge-shaped limiting surface 73 on the wedge-shaped limiting pin contacts the upper connecting rod 2. The surface of the wedge-shaped limiting pin is a continuous wedge-shaped limiting surface 73. Its linear displacement changes the support limit position in contact with the upper connecting rod 2, forming a variable support point, thereby achieving continuous, stepless adjustment of the tabletop unfolding angle. All links in the entire transmission chain work closely together to ensure a smooth and reliable adjustment process. Under load, the load on the tabletop is transmitted to the wedge-shaped limiting surface 73 via the upper connecting rod 2, and is decomposed into radial pressure on the wedge-shaped limiting pin and positive pressure on the guide sleeve 8, so that the main external force is borne by the frame 1 and the guide sleeve 8, rather than the transmission system and the drive source 4.

[0026] refer to Figures 1-3The drive source 4 can be a dual-shaft motor, with both shafts connected to the left-hand lead screw 51 and the right-hand lead screw 52 via couplings. The taper of the wedge-shaped limiting surface 73 is ≤10°, and the lead angle of the lead screw is ≤10°. Thus, both the wedge-shaped limiting pin and the lead screw possess self-locking characteristics. Therefore, after the tabletop angle is adjusted, the motor cannot be reversed under external load, ensuring reliable limiting. When the tabletop is pressed down, the upper connecting rod 2 and the frame 1 clamp together, and the wedge-shaped limiting pin is only subjected to pressure, without bending moment or shear load, making it less prone to damage and providing strong load-bearing capacity. The lead screw can be a metal lead screw. Compared to an electric opening and closing tabletop, this solution requires less motor power, and the abuse load is not transmitted to the motor. Therefore, a smaller motor can be selected, occupying less space. The motor can be a stepper motor directly driving the lead screw rotation, or a DC brushed motor / DC brushless motor combined with a reduction gear set or a worm gear helical gear pair can be used for driving.

[0027] refer to Figures 1-3 The drive source 4 can also be a manually operated component, such as a handwheel or knob (not shown in the figure). The manually operated component is connected to the lead screw via a shaft and coupling or a gear meshing with the lead screw. Other existing methods can also be used, as long as they can drive the lead screw to rotate. The lead screw can be an injection-molded lead screw. Because manual adjustment of the rotation speed is slow, a lead screw with a larger lead can be used.

[0028] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An adjustable-angle car table frame structure, characterized in that, include: Skeleton (1), The frame (1) is hinged with an upper connecting rod (2) and a lower connecting rod (3), and the ends of the upper connecting rod (2) and the lower connecting rod (3) away from the frame (1) are hinged together to a mounting base (9). A drive source (4) is provided on the frame (1). The drive source (4) is connected to a lead screw. The drive source (4) drives the lead screw to rotate. The lead screw is connected to a wedge-shaped limiting pin through a nut. The wedge-shaped limiting pin is slidably engaged with the frame (1). Thus, the drive source (4) controls the linear movement of the wedge-shaped limiting pin through the lead screw. A wedge-shaped limiting surface (73) is provided on the side of the wedge-shaped limiting pin facing the upper connecting rod (2). The wedge-shaped limiting surface (73) is slidably engaged with the side of the upper connecting rod (2) near the frame (1). Through the linear movement of the wedge-shaped limiting pin, the support limit position of the wedge-shaped limiting pin on the upper connecting rod (2) is changed, thereby realizing the continuous adjustment of the tabletop angle.

2. The adjustable-angle car table frame structure according to claim 1, characterized in that: The frame (1) is connected to an upper connecting rod (2) and a lower connecting rod (3) on both sides. The lead screw includes a left-hand lead screw (51) and a right-hand lead screw (52) connected to both sides of the drive source (4) and driven by the drive source (4) to rotate synchronously. The wedge-shaped limiting pin includes a left wedge-shaped limiting pin (71) and a right wedge-shaped limiting pin (72). Both the left wedge-shaped limiting pin (71) and the right wedge-shaped limiting pin (72) have wedge-shaped limiting surfaces (73) that cooperate with the upper connecting rod (2). The nut includes a left nut (61) and a right nut (62). The left nut (61) and the right nut (62) are respectively sleeved on the left-hand lead screw (51) and the right-hand lead screw (52) and respectively connected to the left wedge-shaped limiting pin (71) and the right wedge-shaped limiting pin (72). When the drive source (4) drives the left-hand lead screw (51) and the right-hand lead screw (52) to rotate, it causes the left nut (61) and the right nut (62) to move towards or away from each other, thereby pushing the left wedge-shaped limiting pin (71) and the right wedge-shaped limiting pin (72) to slide towards each other on the frame (1). Thus, the left wedge-shaped limiting pin (71) and the right wedge-shaped limiting pin (72) extend or retract to continuously change the support limit position of the upper connecting rod (2) so as to realize the continuous adjustment of the tabletop angle.

3. The adjustable-angle car table frame structure according to claim 2, characterized in that: Guide sleeves (8) are fixedly connected to both sides of the frame (1) to guide the left wedge-shaped limiting pin (71) and the right wedge-shaped limiting pin (72) to move in a straight line.

4. The adjustable-angle car table frame structure according to any one of claims 1-3, characterized in that: The drive source (4) is a dual-output shaft motor.

5. An adjustable-angle car table frame structure according to any one of claims 1-3, characterized in that: The drive source (4) is a manual operation component, which is a handwheel or knob, and is connected to the lead screw via a shaft or gear.

6. The adjustable-angle car table frame structure according to claim 4, characterized in that: The taper of the wedge-shaped limiting surface (73) is ≤10°.

7. The adjustable-angle car table frame structure according to claim 4, characterized in that: The lead angle of the lead screw is ≤10°.

Images