Rotary synchronous locking device for lifting table in vehicle

Abstract

The utility model discloses a rotation synchronous locking device for a lifting table in a vehicle, and relates to the technical field of vehicle interior trim functional equipment. The device comprises a base body, fixing parts symmetrically arranged on the two sides of the chess base body, locking mechanisms symmetrically arranged on the side faces of the base body and oppositely matched with the fixing parts, and a linkage driving assembly located in the base body and matched with the locking mechanisms. According to the technical scheme, the linkage between the rotating angle of the table plate and the locking state in the vertical direction is achieved through the synergistic effect of mechanical transmission and elastic locking mainly according to the dynamic stability control requirement of the embedded lifting table plate in the inner space of the vehicle in the unfolded use state.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle interior functional equipment, in particular to a mechanical linkage locking mechanism applied to a vehicle-mounted liftable table board system. BACKGROUND

[0002] With the development of the automotive industry, people have higher requirements for the functionality and comfort of cars. As a kind of accessory that improves the convenience of use in the car, the in-car table board has been widely used. At present, the common forms of in-car table board include pull-out type and folding type. Especially in MPV models, folding table board is favored because of its flexible use. However, the existing folding in-car table board has some obvious shortcomings in use.

[0003] The existing folding in-car table board usually needs to be lifted first and then rotated for use, and its lifting process mainly relies on the spring force and damping to realize. This design has many problems in actual use. First, the spring force and damping will gradually decrease with the increase of time and use frequency, resulting in insufficient stability of the table board after lifting, and the table board is prone to slide down. Second, although locking can be achieved by manual or electric control, manual operation is more tedious, and electric control increases the cost and complexity. In addition, the existing locking mechanism is relatively complex in structure, which not only increases the manufacturing cost, but also may reduce the reliability due to too many components. CONTENT OF THE INVENTION

[0004] The purpose of the present application is to overcome at least one deficiency in the prior art. The present application provides a rotating synchronous locking device for an in-car lifting table, which mainly aims at the dynamic stability control demand of the in-car embedded lifting table board in the unfolded use state. Through the synergistic effect of mechanical transmission and elastic locking, the linkage of the rotating angle of the table board and the vertical locking state is realized, which is especially suitable for the safety locking control of the adjustable furniture system in the interior space of mobile vehicles such as motor homes and business vehicles.

[0005] To achieve the above-mentioned purpose, the present application discloses a rotating synchronous locking device for an in-car lifting table, which comprises a base body, fixed parts symmetrically arranged on both sides of the base body, locking mechanisms symmetrically arranged on the side surfaces of the base body and matched with the fixed parts, and a linkage driving assembly matched with the locking mechanisms in the base body.

[0006] Among them, the fixed part is fixed at the upper stop position of the stroke of the table board, and a lock slot is formed on the fixed part to form a locking force receiving structure;

[0007] The linkage driving assembly is arranged through the base in the axial direction, and contains a transmission shaft body, one end of the transmission shaft body is connected with the rotating shaft of the table board through a connecting mechanism to form a rotating pair, and the other end is fixed with a non-circular cam, and the geometric profile of the cam has the periodic variation characteristics of the long-diameter section and the short-diameter section.

[0008] Preferably, the transmission shaft body has rotation damping;

[0009] Preferably, the cam is in the shape of an ellipse.

[0010] The linkage sliding blocks are symmetrically arranged in the base and can slide linearly towards both sides of the base and have an elastic reset function, and the two linkage sliding blocks are matched with corresponding locking mechanisms respectively.

[0011] One end of the working surface of the linkage sliding block is in dynamic contact with the outer edge of the cam, when the cam rotates to the long-diameter section, the sliding block is extruded by the profile of the cam to generate linear displacement, and the tail of the linkage sliding block is pushed out of the outside of the bearing base; when the cam switches to the short-diameter section, the linkage sliding block is reset and retracted.

[0012] The displacement amount of the sliding block is accurately controlled by the rotation angle of the cam, and a linear correspondence relationship between the displacement amount and the rotation angle is formed.

[0013] The locking mechanism contains a guide base, a telescopic locking tongue and an elastic pre-tightening device; the telescopic locking tongue and the guide base form a sliding pair, the front end of the telescopic locking tongue is provided with meshing structure matched with the locking groove of the fixed part, and the rear end is in contact with the contact surface of the linkage sliding block group to form pressure transmission.

[0014] The elastic pre-tightening device is composed of at least one spring, which ensures that the telescopic locking tongue is pre-tightened in the non-locking state. When the linkage sliding block is extended, the telescopic locking tongue is axially moved to realize the separation from the fixed base through mechanical transmission, and when the linkage sliding block is reset, the telescopic locking tongue is reset and rigidly engaged with the fixed base under the driving of the elastic pre-tightening device.

[0015] Compared with the prior art, the device synchronously controls the locking state switching through the rotation angle change of the cam mechanism, when the table board rotates to the preset working angle, the long-diameter section of the cam drives the locking mechanism to enter the completely locked state, forming a rigid constraint in the vertical direction; when the table board rotates to the storage angle, the short-diameter section of the cam releases the constraint of the locking mechanism. The rotation driving and the locking execution form a mechanical linkage relationship, and through single rotation input, double-degree-of-freedom action output is realized, which effectively simplifies the transmission chain structure and improves the system reliability. The functional modules are designed in a modularized manner, and quick disassembly and maintenance are realized through positioning pins and fasteners.

[0016] The above listed beneficial effects are not exhaustive of all advantages. Other potential beneficial effects and detailed technical implementation manners will be further disclosed in the embodiments or other description parts of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] Aspects of the present disclosure will become more fully understood from the detailed description and accompanying drawings. The drawings are intended for illustrative purposes only and the scale of the various elements in the drawings is not intended to be to scale. In the drawings:

[0018] Fig. 1 is a structural schematic diagram of an embodiment of the present disclosure, in which the fixing portion is not shown.

[0019] Fig. 2 is a structural schematic diagram of an embodiment of the present disclosure in which the fixing portion is removed.

[0020] Fig. 3 is an exploded view of an embodiment of the present disclosure.

[0021] In the drawings, the reference numerals are respectively: base 1, fixing portion 2, locking mechanism 3, linkage driving assembly 4, linkage sliding block 5, cam 401, transmission shaft body 402, telescopic lock tongue 302, guide base 301, elastic pre-tightening device 303. DETAILED DESCRIPTION

[0022] The present disclosure will be described with respect to the drawings in which several embodiments of the present disclosure are shown. It is to be understood that the present disclosure can be embodied in many different forms and is not to be limited to the embodiments described herein; in fact, these embodiments are to be provided for completeness of disclosure and fully convey the scope of the present disclosure to those skilled in the art. It is also to be understood that the embodiments disclosed herein can be combined in various ways to provide additional embodiments.

[0023] It is to be understood that, in all the drawings, the same reference numerals indicate the same elements. In the drawings, the dimensions of certain features can be distorted for the sake of clarity.

[0024] It is to be understood that the language used in the specification is only for describing specific embodiments and is not intended to limit the present disclosure. Unless otherwise defined, all terms (including technical and scientific terms) used in the specification have meanings commonly understood by those skilled in the art. For the sake of brevity and / or clarity, techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the description of the present disclosure.

[0025] As used in the specification, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. As used in the specification, the language "includes" and / or "comprising," or "containing" and / or "having" shall be construed as meaning "including, but not limited to." As used in the specification, the language "and / or" includes all possible combinations of the entities it connects. Embodiment

[0026] With reference to the accompanying drawings Figs. 1 to 3 The embodiment provides a rotating synchronous locking device for an in-vehicle lifting table, which is composed of a base body 1 made of high-strength aluminum alloy, a fixed part 2 symmetrically welded on a table plate sliding rail skeleton of a vehicle, two sets of matched locking mechanisms 3, and an internal linkage driving assembly 4.

[0027] In the above structure, the base body 1 is in a hollow rectangular structure. The fixed part 2 is stamped and formed by cold-rolled steel plate, and is fixed at the upper stop point of the table plate movement track by bolts. The fixed part 2 has a plurality of locking grooves, and forms a plurality of locking groove structures in a cogged structure to enhance the shear resistance.

[0028] The linkage sliding blocks 5 are symmetrically arranged in the body 1, and the base body 1 is provided with sliding grooves matched with the linkage sliding blocks 5 for realizing the linear sliding of the linkage sliding blocks 5. The linkage sliding blocks are in a T shape, the head part is relatively matched with the linkage driving assembly 4, and meanwhile, a return spring or a spring leaf is arranged between the linkage sliding blocks 5 and the base body 1 to realize the return of the linkage sliding blocks 5 after sliding along the sliding grooves.

[0029] The linkage driving assembly 4 penetrates the axial center of the base body 1 and forms a movement coupling relationship with the table plate rotating shaft, and realizes the accurate synchronization of the rotating angle and the locking displacement through mechanical transmission. The linkage driving assembly 4 arranged inside the base body 1 includes a cam 401 with a variable diameter profile and a transmission shaft body 402 with a rotating damping locked at one end of the cam 401. The rotating damping characteristics of the transmission shaft body 402 can be realized by various conventional structures, for example, a disc spring set arranged at the shaft end, which can effectively prevent accidental unlocking caused by accidental touch.

[0030] In the embodiment, the elliptical cam 401 is manufactured by a powder metallurgy process, and the difference between the major axis and the minor axis of the elliptical profile is 3-5 mm. The long diameter end is provided with a transition curved surface to ensure the smoothness of movement. When the table plate rotates, the transmission shaft body 402 drives the cam 401 to rotate synchronously, the long diameter section of the elliptical profile extrudes the linkage sliding block 5 to generate axial displacement, and the short diameter section allows the linkage sliding block 5 to retract under the action of the return spring.

[0031] The tail part 5 of the sliding block extends out of the base body part and forms a surface contact transmission with the telescopic locking tongue 302 of the locking mechanism 3. When the cam 401 rotates to the long diameter phase, the sliding block displacement can reach 8-12 mm, which accurately corresponds to the 90° rotating angle of the table plate, forming a linear displacement relationship.

[0032] In the present embodiment, the locking mechanism 3 is composed of a guide base 301, a telescopic lock tongue 302 and an elastic pre-tightening device 303, which constitute a three-stage transmission system.

[0033] Specifically, the guide base 301 is made of aluminum alloy by extrusion molding, and the guide base 301 is provided with a guide structure for realizing linear guidance of the telescopic lock tongue 302, and the telescopic lock tongue 302 is provided with meshing teeth matched with the lock slot.

[0034] In the above structure, the elastic pre-tightening device 303 includes two groups of symmetrically arranged coil springs, and the pre-tightening force can be adjusted in the range of 5-10 N, which ensures that the telescopic lock tongue 302 is completely retracted in the non-locking state. When the linkage slider 302 is extended, it pushes the telescopic lock tongue 302 to move along the guide base 301 until it is disengaged from the lock slot of the fixed part 2.

[0035] The working process of the device is as follows: when the user rotates the table board, the transmission shaft body 402 drives the elliptical cam 401 to rotate synchronously. In the 0-45° rotation stage, the short diameter section of the cam 401 gradually turns to the long diameter section, the linkage slider 5 is extruded by the contour and starts to linearly extend, pushing the telescopic lock tongue 302 to move towards the fixed part 2. When rotated to 90°, the long diameter section of the cam 401 reaches the maximum stroke, making the telescopic lock tongue 302 disengage from the lock slot.

[0036] During this process, the rotational damping characteristics of the transmission shaft body 402 can effectively offset the interference caused by vehicle vibration. When unlocking, the table board is continued to be rotated in the reverse or same direction, the contour change of the cam 401 makes the linkage slider 5 reset spring release stored energy, and the telescopic lock tongue 302 is completely embedded in the lock slot to form a rigid connection, completing the locking.

[0037] That is, when the short diameter of the cam 401 cooperates with the linkage slider 5, the locking is completed, and when the long diameter cooperates with the linkage slider 5, the unlocking is completed.

[0038] In actual application, when the vehicle is running on a bumpy road, the table board is reliably locked at the 90° unfolded position, and experimental data shows that it can withstand a relatively large longitudinal impact load. Compared with the traditional manual locking device, the operation steps are simplified from 3 steps to a single action of rotation, and the response time is shortened to less than 0.5 seconds, which is especially suitable for business vehicles, motor homes and other use scenarios that require frequent adjustment of the table board angle.

[0039] Although the exemplary embodiments of the present disclosure have been described, it should be understood by those skilled in the art that various changes and modifications can be made to the exemplary embodiments of the present disclosure without departing from the spirit and scope of the present disclosure in essence. Therefore, all changes and modifications are included in the protection scope of the present disclosure defined by the claims. The present disclosure is defined by the appended claims, and the equivalents of these claims are also included.

Claims

1. A rotary synchronous locking device for a vehicle-mounted lifting table, characterized in that, The device comprises a base, fixed parts symmetrically arranged on both sides of the base, locking mechanisms symmetrically arranged on the side of the base and matched with the fixed parts, and a linkage driving assembly matched with the locking mechanisms in the base; The fixed parts are fixed at the upper stop position of the stroke of the table board, and a locking groove is formed on the fixed parts to form a locking stress structure; The linkage driving assembly is arranged through the base along the axial direction, and comprises a transmission shaft body, one end of which is connected with the rotating shaft of the table board through a connecting mechanism to form a rotating pair, and the other end of which is fixed with a non-circular cam, the geometric profile of the cam having the periodic variation characteristics of long-diameter and short-diameter sections; The base is symmetrically provided with linkage sliders which can slide linearly towards both sides of the base and have an elastic reset function, and the two linkage sliders are matched with the corresponding locking mechanisms respectively; One end of the linkage slider working surface is matched with the outer edge of the cam to form dynamic contact, when the cam rotates to the long-diameter section, the slider is extruded by the cam profile to generate linear displacement, and the linkage slider tail is pushed out of the outside of the bearing base; when the cam switches to the short-diameter section, the linkage slider resets and retracts; The locking mechanism comprises a guide base, a telescopic lock tongue and an elastic pre-tightening device; the telescopic lock tongue and the guide base form a sliding pair, the front end of the telescopic lock tongue is provided with a meshing structure matched with the locking groove of the fixed part, and the rear end is in contact with the linkage slider group contact surface to form pressure transmission; When the linkage slider is extended, the telescopic lock tongue is pushed to move axially to realize the separation from the fixed base by mechanical transmission, and when the linkage slider resets, the telescopic lock tongue is reset by the elastic pre-tightening device to be rigidly engaged with the fixed base.

2. A rotation synchronizing lock device for an in-vehicle lifting table according to claim 1, characterized in that, The transmission shaft body has rotation damping.

3. The rotation synchronization locking device for an in-vehicle lifting table according to claim 1, characterized in that, The shape of the cam is oval.

4. The rotary synchronization locking device for an in-vehicle lifting table according to claim 1, characterized by The elastic pre-tightening device is composed of at least one spring to ensure that the telescopic lock tongue is pre-tightened and reset in the locking state.

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