Transmission mechanism and handrail box

Abstract

The utility model discloses a transmission mechanism and handrail box, transmission mechanism includes left rocker arm, right rocker arm, double tooth linkage gear set and elastic fit subassembly. Double tooth linkage gear set contains left side gear and right side gear that left and right side are side by side and the outer periphery straight tooth engagement. Through the first one -way tooth of left rocker arm and the second one -way tooth of left side gear engagement, the third one -way tooth of right rocker arm and the fourth one -way tooth of right side gear engagement, utilize the characteristic of one -way tooth " only along the opening direction transmission, the closing direction disengagement", thoroughly solved the technical defects of traditional spur gear bidirectional transmission " the closing side must link the other side", when closing a certain side door alone, the one -way tooth of corresponding side rocker arm and the one -way tooth of gear skid because of the rotational direction conflict, and realize disengagement under the yielding action of elastic fit subassembly, ensure that the door of unoperated side keeps open state, solved the problem that the past single -sided door cannot be operated to close, adapts more use scene.

Description

Technical Field

[0001] This utility model relates to the field of automotive interior technology, and in particular to a transmission mechanism and armrest box. Background Technology

[0002] As a core functional component of the car's center console, the split-opening armrest box consists of a left and right armrest door, a box body, a locking mechanism, a drive mechanism, and a transmission mechanism. Its core function is to provide storage space and elbow support for front-seat occupants. Both the left and right armrest doors are hinged to the box body. The hinges are typically integrated into the doors, allowing the doors to rotate upwards relative to the box body. When closed, they are locked to the box body using a locking mechanism (such as a latch or magnet). When opened, the locking mechanism unlocks, and the drive mechanism, usually a torsion spring, propels the doors upwards. Both the left and right armrest doors have a torsion spring for this upward rotation. To improve ease of operation, split-opening armrest boxes generally require the left and right doors to open synchronously. This means that when either door is opened, both doors rotate upwards at the same speed, avoiding jamming or interference caused by asynchronous opening.

[0003] Currently, the mainstream solution for synchronous opening of split-type armrest boxes is a double spur gear transmission. While the spur gear transmission can meet the synchronous opening requirement, it has significant functional defects: because the spur gear transmission has bidirectional transmission characteristics, when a user attempts to close one side of the box independently (e.g., only taking items from the left box and then closing it), the closing action is synchronously transmitted to the other side through the gear mesh, causing the right box to close synchronously with the left box, making it impossible to close one side independently. This problem causes serious inconvenience in actual use. For example, if the passenger opens the right box to retrieve an item, and the driver closes the left box, the right box will close synchronously, affecting the passenger's operation. Similarly, if an item is temporarily taken from one side and it is necessary to close that side separately to keep the other side open, the traditional structure cannot meet the needs of such scenarios. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a transmission mechanism and a handrail box, which can solve the problem that the doors can be opened simultaneously but cannot be closed on one side.

[0005] To solve the above-mentioned technical problems, this utility model discloses a transmission mechanism, including a left rocker arm, a right rocker arm, a double-tooth linkage gear set, and an elastic fitting component; The double-tooth linkage gear set includes a left gear and a right gear, which are arranged side by side and are driven by meshing with each other through the outer circumferential spur teeth. The left rocker arm and the left gear are stacked together. The end face of the left rocker arm facing the left gear is provided with a plurality of first one-way teeth arranged continuously in the circumferential direction. The end face of the left gear facing the left rocker arm is provided with a plurality of second one-way teeth arranged continuously in the circumferential direction and adapted to mesh with the first one-way teeth. The right rocker arm and the right gear are stacked together. The end face of the right rocker arm facing the right gear is provided with a plurality of third one-way teeth arranged continuously in the circumferential direction. The end face of the right gear facing the right rocker arm is provided with a plurality of fourth one-way teeth arranged continuously in the circumferential direction and adapted to mesh with the third one-way teeth. When the left rocker arm is rotated open, the first one-way tooth and the second one-way tooth engage in transmission; when the left rocker arm is rotated closed, the first one-way tooth and the second one-way tooth disengage in transmission. When the right rocker arm is rotated open, the third one-way tooth and the fourth one-way tooth engage in transmission; when the right rocker arm is rotated closed, the third one-way tooth and the fourth one-way tooth disengage in transmission. The elastic engagement assembly includes a left spring and a right spring. The left spring is used to drive the left rocker arm to abut against the left gear to maintain the meshing of the first one-way tooth and the second one-way tooth. The right spring is used to drive the right rocker arm to abut against the right gear to maintain the meshing of the third one-way tooth and the fourth one-way tooth.

[0006] Wherein, the first one-way tooth and the fourth one-way tooth are clockwise one-way teeth, and the second one-way tooth and the third one-way tooth are counterclockwise one-way teeth. Both the clockwise one-way tooth and the counterclockwise one-way tooth have right-angled triangular tooth structures. The inclined tooth surface of the clockwise one-way tooth is inclined upward in a clockwise direction, and the inclined tooth surface of the counterclockwise one-way tooth is inclined upward in a counterclockwise direction.

[0007] The left and right gears are both integrally formed structures. The outer spur teeth of the left gear are concentrically arranged with the second unidirectional tooth on its end face, and the outer spur teeth of the right gear are concentrically arranged with the fourth unidirectional tooth on its end face.

[0008] The armrest box includes a box body, and an installation platform is fixedly connected to the outer side of the box body. The left rocker arm, right rocker arm, left gear and right gear are rotatably mounted on the installation platform.

[0009] The elastic bonding component further includes a left pivot pressure block and a right pivot pressure block. Both the left pivot pressure block and the right pivot pressure block include a pivot portion. The top end of the pivot portion extends outward to form a pressing portion, and the bottom end of the pivot portion is fixedly connected to the mounting platform. The left spring, left rocker arm, and left gear are sequentially sleeved on the outer circumferential side of the rotating shaft portion of the left rotating shaft pressure block from top to bottom, so that the top end of the left spring abuts against the bottom surface of the lower pressing portion of the left rotating shaft pressure block, the bottom end of the left spring abuts against the top surface of the left rocker arm, and a left gap is left between the lower pressing portion of the left rotating shaft pressure block and the left rocker arm, the height of the left gap being greater than or equal to the tooth height of the first one-way tooth; The right-side spring, right rocker arm, and right-side gear are sequentially fitted onto the outer circumferential side of the right-side rotating shaft pressure block from top to bottom, such that the top end of the right-side spring abuts against the bottom surface of the lower pressing part of the right-side rotating shaft pressure block, the bottom end of the right-side spring abuts against the top surface of the right rocker arm, and a right-side gap is left between the lower pressing part of the right-side rotating shaft pressure block and the right rocker arm, the height of which is greater than or equal to the tooth height of the third unidirectional tooth.

[0010] The system also includes a left-side screw and a right-side screw. The mounting platform has an outwardly protruding left-side stud and a right-side stud spaced apart from the left-side stud. The left-side stud is inserted into the pivot portion of the left-side pivot block and then threadedly connected to the left-side screw. The right-side stud is inserted into the pivot portion of the right-side pivot block and then threadedly connected to the right-side screw.

[0011] The bottom of the rotating shaft portion of the left rotating shaft pressure block and the bottom of the rotating shaft portion of the right rotating shaft pressure block are each provided with at least one slot, and at least one protrusion that engages with the slot extends outward from the bottom of the outer peripheral side of the left stud and the bottom of the outer peripheral side of the right stud.

[0012] The installation platform is also provided with a left guide groove around the outer periphery of the left stud and a right guide groove around the outer periphery of the right stud; the left gear extends toward the left guide groove and inserts into the left guide groove, and the left guide part can slide along the left guide groove. The right gear extends toward the right guide groove and inserts into the right guide groove. The right guide part can slide along the right guide groove.

[0013] The bottom surface of the lower pressing part of the left rotating shaft pressing block is provided with a left receiving groove for inserting one end of the left spring; the bottom surface of the lower pressing part of the right rotating shaft pressing block is provided with a right receiving groove for inserting one end of the right spring.

[0014] This utility model also discloses an armrest box, including a left door, a right door, and a box body. The left door is provided with a left pivot hinged to the box body, and the right door is provided with a right pivot hinged to the box body, so that both the left and right doors can be rotated relative to the box body. It also includes the aforementioned transmission mechanism, and both the left and right doors are connected to the transmission mechanism.

[0015] Compared with the prior art, the embodiments of this utility model have the following beneficial effects: (1) By engaging the first one-way tooth of the left rocker arm with the second one-way tooth of the left gear, and the third one-way tooth of the right rocker arm with the fourth one-way tooth of the right gear, the technical defect of "closing one side must be linked to the other side" in traditional spur gear bidirectional transmission is completely solved by utilizing the characteristic of one-way teeth that "transmits force only in the opening direction and disengages in the closing direction". When closing a door on one side, the one-way tooth of the rocker arm on the corresponding side slips due to the conflict of rotation direction, and disengages under the yielding action of the elastic fitting component, ensuring that the door on the unoperated side remains open, solving the problem of not being able to close a door on one side in the past, and adapting to more usage scenarios.

[0016] (2) The double-tooth linkage gear set constructs the core transmission link through the rigid meshing of the outer circumferential straight teeth. The rotational motion of the left and right gears is directly transmitted through the meshing of straight teeth. There are no easily deformable parts such as intermediate connecting rods and racks. The transmission error is controlled within 0.1mm. The opening time difference of the two side doors is ≤0.1s. The synchronization qualification rate reaches 100%, which is far superior to the traditional linkage transmission mechanism.

[0017] (3) The left and right springs of the elastic bonding component provide continuous and uniform bonding pressure to the left rocker arm and the left gear, and the right rocker arm and the right gear, respectively, effectively eliminating the problem of force transmission jamming and abnormal noise caused by tooth surface gap, thereby extending the service life.

[0018] (4) The overall structure is simple and compact with fewer parts, which simplifies the assembly process, improves the installation efficiency of the production line, and reduces the risk of failure caused by the accumulation of tolerances of multiple parts.

[0019] (5) The left rocker arm and the left gear, and the right rocker arm and the right gear are arranged in a stacked manner. The two gears are arranged side by side. The overall mechanism has a small axial thickness, which saves more space compared with the traditional transmission mechanism and leaves a larger design margin for the storage space inside the armrest box.

[0020] (6) Through innovative optimization of the transmission meshing structure, the problem that the single-sided door could not be closed in the past has been solved. It takes into account the diversity of functions, the reliability of performance, the compactness of structure and the cost economy, and fully meets the industrialization needs of the automotive double-open armrest box for high experience, high durability and low cost. It has significant technological progress and market application value. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the transmission mechanism for the armrest box in the embodiment; Figure 2 This is an exploded view of the transmission mechanism for the armrest box in the embodiment; Figure 3 This is a structural schematic diagram of the transmission mechanism for the armrest box from another perspective in the embodiment; Figure 4 yes Figure 3 Enlarged view of point A in the middle; Figure 5 This is an exploded view of the transmission mechanism for the armrest box in the embodiment from another perspective; Figure 6 This is a schematic diagram of the installation platform in the embodiment; Figure 7 This is a schematic diagram of the structure of the left rotating shaft pressure block in the embodiment; Figure 8 This is a schematic diagram of the structure of the left gear in the embodiment; Figure 9 This is a schematic diagram of the right-hand gear in the embodiment; Figure 10 This is a schematic diagram of the left rocker arm in the embodiment; Figure 11 This is a schematic diagram of the right rocker arm in the embodiment. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, mechanism, product, or end that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or ends.

[0025] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0026] This utility model discloses a specific embodiment of a transmission mechanism; please see [link / reference]. Figures 1 to 11 The transmission mechanism in this embodiment is mainly used in the split-open armrest box of the car center console. It can be understood that the transmission mechanism is one of the mechanisms in the armrest box assembly. The transmission mechanism includes a left rocker arm 51, a right rocker arm 52, a double-tooth linkage gear set and an elastic fitting component.

[0027] Please see Figures 1 to 2 The armrest box includes a left door 11, a right door 12, and a box body 1. The left door 11 is provided with a left pivot 21 that is hinged to the box body 1, and the right door 12 is provided with a right pivot 31 that is hinged to the box body 1, so that both the left door 11 and the right door 12 can be rotated relative to the box body 1. It should be noted that a left torsion spring (not shown) is provided between the box body 1 and the left door 11 to drive the left door 11 to automatically rotate in the opening direction, and a right torsion spring (not shown) is provided between the box body 1 and the right door 12 to drive the right door 12 to automatically rotate in the opening direction. The box body 1 is also provided with a locking mechanism (not shown) for locking the left door 11 and the right door 12. When the armrest box is closed, the locking mechanism fixes the left door 11 and the right door 12 in the closed state. After the locking mechanism is unlocked by external force, the left torsion spring and the right torsion spring synchronously drive the left door 11 and the right door 12 to automatically rotate in the opening direction.

[0028] Combination Figure 3 and Figure 4The double-tooth linkage gear set consists of a left gear 41 and a right gear 42, both of which can be made of metal or rigid plastic. The left gear 41 and right gear 42 are arranged side-by-side and mesh with each other through their outer spur teeth. The left rocker arm 51 is stacked on top of the left gear 41. The end face of the left rocker arm 51 facing the left gear 41 has multiple first unidirectional teeth arranged continuously in the circumferential direction. These first unidirectional teeth are clockwise unidirectional teeth 62. The end face of the left gear 41 facing the left rocker arm 51 has multiple second unidirectional teeth arranged continuously in the circumferential direction. These second unidirectional teeth are counterclockwise unidirectional teeth 61. The first and second unidirectional teeth mesh for transmission. Unidirectional tooth meshing transmission, as the name suggests, can only achieve rotational transmission in a single direction; rotation in the opposite direction cannot achieve rotational transmission. Both the clockwise unidirectional tooth 62 and the counterclockwise unidirectional tooth 61 have a right-angled triangular tooth structure. The plane containing the straight side of the right-angled triangular tooth is the direct meshing surface, and the plane containing the hypotenuse of the right-angled triangular tooth is the inclined tooth surface. The inclined tooth surface of the clockwise unidirectional tooth 62 is inclined upwards in a clockwise direction. That is, multiple inclined tooth surfaces of the clockwise unidirectional tooth 62 are continuously arranged in a clockwise direction. It should be noted that the inclined tooth surface of the clockwise unidirectional tooth 62 faces the counterclockwise direction. The inclined tooth surface of the counterclockwise unidirectional tooth 61 is inclined upwards in a counterclockwise direction. That is, multiple inclined tooth surfaces of the counterclockwise unidirectional tooth 61 are continuously arranged in a counterclockwise direction. It should be noted that the inclined tooth surface of the counterclockwise unidirectional tooth 61 faces the clockwise direction.

[0029] When the left rocker arm 51 rotates, that is, when the clockwise one-way tooth 62 acts as the driving tooth, if the left rocker arm 51 rotates open, that is, when the clockwise one-way tooth 62 rotates clockwise, the straight meshing surface of the clockwise one-way tooth 62 abuts against the straight meshing surface of the counterclockwise one-way tooth 61, thus driving the counterclockwise one-way tooth 61 to rotate; if the left rocker arm 51 rotates closed, when the clockwise one-way tooth 62 rotates counterclockwise, the inclined tooth surface of the clockwise one-way tooth 62 abuts against the inclined tooth surface of the counterclockwise one-way tooth 61, and the clockwise one-way tooth 62 will disengage from the counterclockwise one-way tooth 61. At this time, the clockwise one-way tooth 62 will not be able to drive the counterclockwise one-way tooth 61 to rotate.

[0030] In other embodiments, the clockwise unidirectional tooth 62 and the counterclockwise unidirectional tooth 61 may be configured as trapezoidal or other shapes with inclined surfaces.

[0031] The right rocker arm 52 and the right gear 42 are also stacked. The end face of the right rocker arm 52 facing the left gear 41 has multiple third unidirectional teeth arranged continuously in the circumferential direction. The third unidirectional teeth are counterclockwise unidirectional teeth 61. The end face of the right gear 42 facing the right rocker arm 52 has multiple fourth unidirectional teeth arranged continuously in the circumferential direction. The fourth unidirectional teeth are clockwise unidirectional teeth 62. Similarly, both the clockwise unidirectional teeth 62 and the counterclockwise unidirectional teeth 61 are right-angled triangular tooth structures.

[0032] When the right rocker arm 52 rotates, that is, when the counter-clockwise one-way tooth 61 acts as the driving tooth, if the right rocker arm 52 rotates open, that is, when the counter-clockwise one-way tooth 61 rotates counterclockwise, the direct meshing surface of the counter-clockwise one-way tooth 61 can abut against the direct meshing surface of the clockwise one-way tooth 62, thereby driving the clockwise one-way tooth 62 to rotate. If the right rocker arm 52 rotates closed, that is, when the counter-clockwise one-way tooth 61 rotates clockwise, the inclined tooth surface of the counter-clockwise one-way tooth 61 will abut against the inclined tooth surface of the clockwise one-way tooth 62, and the counter-clockwise one-way tooth 61 will disengage from the clockwise one-way tooth 62. At this time, the counter-clockwise one-way tooth 61 will not be able to drive the clockwise one-way tooth 62 to rotate.

[0033] Both the right rocker arm 52 and the left rocker arm 51 can be made of plastic material composed of ABS and glass fiber. The end face of the right rocker arm 52 facing the right gear 42 is provided with multiple counterclockwise unidirectional teeth 61 arranged continuously in the circumferential direction. The end face of the right gear 42 facing the right rocker arm 52 is provided with multiple clockwise unidirectional teeth 62 arranged continuously in the circumferential direction. The structure of the two types of unidirectional teeth is consistent with the unidirectional teeth of the left rocker arm 51 and the left gear 41, and they are adapted to mesh with each other.

[0034] As a preferred embodiment, both the left gear 41 and the right gear 42 are integrally formed structures. The outer circumferential straight teeth of the left gear 41 are concentrically arranged with the one-way teeth on its end face, and the outer circumferential straight teeth of the right gear 42 are concentrically arranged with the one-way teeth on its end face, which facilitates processing and installation.

[0035] In this embodiment, the elastic contact assembly includes a left spring 71 and a right spring 72. The left spring 71 drives the left rocker arm 51 to contact the left gear 41 to maintain tooth engagement, and the right spring 72 drives the right rocker arm 52 to contact the right gear 42 to maintain tooth engagement. Preferably, both the left spring 71 and the right spring 72 are helical wire springs. In other embodiments, the springs can be replaced with disc springs, wave springs, or solid plastic springs, etc.

[0036] In the closed state, please see Figure 1 The left rocker arm 51 is tilted to the left at its limit position, and the right rocker arm 52 is tilted to the left at its limit position. Figure 1 The right rocker arm 52 is in the open position (therefore, it is in the left extreme position). When open, the left rocker arm 51 and the right rocker arm 52 are swayed by external force along with the door. The left rocker arm 51 swings to the right, and the right rocker arm 52 swings to the left, that is, the left rocker arm 51 and the right rocker arm 52 move in opposite directions. Please see... Figure 4 The clockwise one-way tooth 62 on the end face of the left rocker arm 51 meshes with the counterclockwise one-way tooth 61 of the left gear 41 under the contact action of the left spring 71. The left rocker arm 51 swings to the right, which is equivalent to the left rocker arm 51 rotating clockwise. Thus, the clockwise one-way tooth 62 of the left rocker arm 51 pushes the counterclockwise one-way tooth 61 of the left gear 41, causing the left gear 41 to rotate clockwise. See below. Figure 4The counterclockwise one-way tooth 61 on the end face of the right rocker arm 52 meshes with the clockwise one-way tooth 62 of the right gear 42 under the contact action of the right spring 72. The right rocker arm 52 swings to the left, which means the right rocker arm 52 rotates counterclockwise. Thus, the counterclockwise one-way tooth 61 of the right rocker arm 52 pushes the clockwise one-way tooth 62 of the right gear 42, causing the right gear 42 to rotate counterclockwise. Since the outer circumferential straight teeth of the left gear 41 mesh with the outer circumferential straight teeth of the right gear 42, it can ensure that the left rocker arm 51 and the right rocker arm 52 swing synchronously. If it is necessary to close the left box door 11 or the right box door 12 separately, taking the closing of the left box door 11 separately as an example, the left rocker arm 51 swings to the left (in the open state, the left rocker arm 51 is at the right extreme position). The clockwise one-way tooth 62 and the counterclockwise one-way tooth 61 will slip out of the teeth. The left rocker arm 51 squeezes the left spring 71 and moves upward to disengage. The left gear 41 is stationary, while the right gear 42 and the right rocker arm 52 are not affected. The left box door 11 is closed separately.

[0037] In this embodiment, combined with Figure 1 and Figure 2 The left rocker arm 51 is driven to the left rotating shaft 21 via a first linkage assembly. The first linkage assembly consists of a left long connecting rod 23 and a left short connecting rod 22 fixed to the outer periphery of the left rotating shaft 21. One end of the left long connecting rod 23 is hinged to the left short connecting rod 22, and the other end is hinged to the left rocker arm 51. The right rocker arm 52 is driven to the right rotating shaft 31 via a second linkage assembly. The structure of the second linkage assembly is symmetrical to that of the first linkage assembly. The second linkage assembly includes a right long connecting rod 33 and a right short connecting rod 32 fixed to the outer periphery of the right rotating shaft 31. Both ends of the right long connecting rod 33 are hinged to the right short connecting rod 32 and the right rocker arm 52, respectively. It should be noted that the hinge can be achieved by a spherical body and an open-ended locking hole. The spherical body is formed on one part, and the open-ended locking hole is formed on the other part. The movable hinge between the two parts is achieved by inserting the spherical body into the open-ended locking hole. In other embodiments, the hinge can be achieved by the cooperation of a shaft and a hole. In addition, the connection between the door and the rocker arm can be selectively set according to the actual usage scenario, as long as the rocker arm can drive the door to rotate back and forth.

[0038] Combination Figure 1 , Figure 5 and Figure 6 A mounting platform 13 is fixedly connected to the outer side of the housing 1. The left rocker arm 51, the right rocker arm 52, the left gear 41, and the right gear 42 are all rotatably mounted on the mounting platform 13. The mounting platform 13 and the housing 1 are integrally formed. The mounting platform 13 is provided with an outwardly protruding left stud 131 and a right stud 132 spaced apart from the left stud 131. It also has a left guide groove 134 surrounding the outer periphery of the left stud 131 and a right guide groove 135 surrounding the outer periphery of the right stud 132.

[0039] Combination Figure 7 The elastic fitting assembly also includes a left screw 91, a right screw 92, a left pivot pressure block 81, and a right pivot pressure block 82. Both the left and right pivot pressure blocks 81 and 82 have a pivot portion 83. The top of the pivot portion 83 extends outward to form a pressing portion 84, so that the pivot pressure block is T-shaped. The pivot portion 83 acts as the rotation shaft for the rocker arm and gear, and the pressing portion 84 acts as a limiting component for the spring. The bottom surface of the pressing portion 84 has a receiving groove 86 for inserting the spring. Preferably, the cross-sectional shape of the receiving groove 86 is semi-circular. The receiving groove 86 further limits the springs 71 and 72, preventing them from deviating. The bottom end of the pivot portion 83 is fixedly engaged with the mounting platform 13 of the armrest box body 1.

[0040] Combination Figures 4 to 11 The left spring 71, the left rocker arm 51 and the left gear 41 are sequentially sleeved on the outer circumferential side of the rotating shaft part 83 of the left rotating shaft pressure block 81 from top to bottom. The top end of the left spring 71 abuts against the receiving groove 86 of the pressing part 84 of the left rotating shaft pressure block 81, and the bottom end abuts against the top surface of the left rocker arm 51. A left gap 801 is left between the pressing part 84 of the left rotating shaft pressure block 81 and the left rocker arm 51. The gap height is greater than or equal to the tooth height of the counterclockwise one-way tooth 61 of the left gear 41. The assembly method of the right spring 72, right rocker arm 52 and right gear 42 is symmetrical to that of the left side. The right spring 72, right rocker arm 52 and right gear 42 are sequentially sleeved on the outer circumferential side of the rotating shaft part 83 of the right rotating shaft pressure block 82 from top to bottom, so that the top of the right spring 72 abuts against the bottom surface of the lower pressing part 84 of the right rotating shaft pressure block 82, and the bottom of the right spring 72 abuts against the top surface of the right rocker arm 52. A right gap 802 is left between the lower pressing part 84 of the right rotating shaft pressure block 82 and the right rocker arm 52. The height of the right gap 802 is also greater than or equal to the tooth height of the clockwise unidirectional tooth 62 of the right gear 42. Through this structure, that is, through the elastic pressure provided by the left spring 71 and the right spring 72, the left spring 71 and the right spring 72 can respectively drive the left rocker arm 51 and the right rocker arm 52 to abut against the corresponding left gear 41 and right gear 42, and always maintain the tooth surface meshing state.

[0041] To improve smoothness and guidance, the left gear 41 extends into the left guide groove 134 with a left guide portion 43, and the right gear 42 extends into the right guide groove 135 with a right guide portion 44. The left guide portion 43 is inserted into the left guide groove 134, and the right guide portion 44 is inserted into the right guide groove 135, serving as a rotational guide. After the left stud 131 is inserted into the rotating shaft portion 83 of the left rotating shaft pressure block 81, it is fixed by a left screw 91. After the right stud 132 is inserted into the rotating shaft portion 83 of the right rotating shaft pressure block 82, it is fixed by a right screw 92. Thus, both the left rotating shaft pressure block 81 and the right rotating shaft pressure block 82 are fixed to the mounting platform 13 by studs. In other embodiments, screws or bolts can replace studs.

[0042] To prevent the rotating shaft pressure blocks 81 / 82 from rotating relative to the studs, the bottom ends of the rotating shaft portions 83 of the left rotating shaft pressure block 81 and the right rotating shaft pressure block 82 are provided with multiple slots 85 arranged circumferentially. The bottom of the outer peripheral side of the left stud 131 and the right stud 132 are provided with multiple protrusions 133 arranged circumferentially. The slots 85 and the protrusions 133 are engaged with each other, further enhancing the connection stability between the rotating shaft pressure blocks and the mounting platform 13 and preventing the rotating shaft pressure blocks from rotating relative to the studs.

[0043] It should be noted that the guide groove can also reduce the contact area between the gear and the mounting platform 13, thereby reducing friction, minimizing abnormal noise, and improving the smoothness of gear rotation.

[0044] This transmission mechanism, through the aforementioned structural design, possesses significant advantages: It employs a symmetrical unidirectional tooth meshing structure, achieving a breakthrough in simultaneous opening and independent closing on one side, allowing users to flexibly choose operating modes to adapt to diverse usage scenarios; the rigid meshing of the double-gear outer circumference straight teeth, combined with the stable tooth surface contact maintained by springs, ensures synchronization error is controlled within 0.1 mm, with no performance degradation after 100,000 opening and closing cycles, significantly improving reliability and durability; the number of parts is reduced by 40% compared to traditional mechanisms, and the compact layout of stacked and side-by-side results in an axial thickness of only 30 to 35 mm, saving 40% of space and increasing storage volume by 15% to 20%; it requires no modification to the existing armrest box main structure, is compatible with conventional torsion spring drive and locking mechanisms, facilitating assembly and maintenance, and significantly reducing modification and after-sales costs.

[0045] The transmission mechanism in this embodiment is used in two scenarios: simultaneous opening and single-sided closing.

[0046] When opened simultaneously, the locking mechanism of the armrest box unlocks, and the left and right torsion springs simultaneously drive the corresponding doors to rotate. The door's pivot drives the corresponding short connecting rod to rotate, and the short connecting rod drives the corresponding rocker arm to rotate through the long connecting rod. The one-way teeth of the rocker arm mesh with the one-way teeth of the gear, driving the gear to rotate, and finally the left door 11 and the right door 12 open simultaneously.

[0047] When one side is closed, such as Figure 1 As shown, if the opened left door 11 is pressed, the left door 11 drives the left short connecting rod 22 and the left long connecting rod 23 through the left pivot 21, thereby causing the left rocker arm 51 to rotate counterclockwise. At this time, the clockwise one-way tooth 62 of the left rocker arm 51 rotates counterclockwise, and the helical tooth surface of the clockwise one-way tooth 62 of the left rocker arm 51 abuts against the helical tooth surface of the counterclockwise one-way tooth 61 of the left gear 41. As the clockwise one-way tooth 62 of the left rocker arm 51 rotates counterclockwise, the clockwise one-way tooth 62 of the left rocker arm 51 gradually moves away from the left gear 41 along the helical tooth surface of the counterclockwise one-way tooth 61 of the left gear 41. That is, the clockwise one-way tooth 62 of the left rocker arm 51 begins to disengage from the counterclockwise one-way tooth 61 of the left gear 41. The left rocker arm 51 gradually... As the left rocker arm moves away from the left gear 41, it compresses the left spring 71 and moves upward, gradually reducing the gap 801 on the left side. Meanwhile, the gap between the left rocker arm 51 and the left gear 41 increases until the clockwise one-way tooth 62 of the left rocker arm 51 completely disengages from the counterclockwise one-way tooth 61 of the left gear 41. During this process, the left rocker arm 51 rotates counterclockwise and moves upward, ensuring that the left rocker arm 51 does not drive the left gear 41 to rotate. The left gear 41 remains stationary, and the right gear 42, right rocker arm 52, and right door 12 are unaffected. The left door 11 is locked by the locking mechanism, completing the individual closing of the left door 11. The process of closing the right door 12 on one side is symmetrical to that on the left and will not be described in detail here. After the left door 11 is closed, the helical tooth surface of the clockwise one-way tooth 62 of the left rocker arm 51 just passes over the top of the helical tooth surface of the counterclockwise one-way tooth 61 of the left gear 41. The compressed left spring 71 will push the clockwise one-way tooth 62 of the left rocker arm 51 to move down and reset, so that the clockwise one-way tooth 62 of the rocker arm 51 and the counterclockwise one-way tooth 61 of the left gear 41 re-mesh, waiting for the next opening.

[0048] Finally, it should be noted that the transmission mechanism disclosed in this utility model embodiment is only a preferred embodiment of this utility model and is only used to illustrate the technical solution of this utility model, not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A transmission mechanism installed in an armrest box, characterized in that, Includes a left rocker arm, a right rocker arm, a double-tooth linkage gear set, and an elastic fitting assembly; The double-tooth linkage gear set includes a left gear and a right gear, which are arranged side by side and are driven by meshing with each other through the outer circumferential spur teeth. The left rocker arm and the left gear are stacked together. The end face of the left rocker arm facing the left gear is provided with a plurality of first one-way teeth arranged continuously in the circumferential direction. The end face of the left gear facing the left rocker arm is provided with a plurality of second one-way teeth arranged continuously in the circumferential direction and adapted to mesh with the first one-way teeth. The right rocker arm and the right gear are stacked together. The end face of the right rocker arm facing the right gear is provided with a plurality of third one-way teeth arranged continuously in the circumferential direction. The end face of the right gear facing the right rocker arm is provided with a plurality of fourth one-way teeth arranged continuously in the circumferential direction and adapted to mesh with the third one-way teeth. When the left rocker arm is rotated open, the first one-way tooth and the second one-way tooth engage in transmission; when the left rocker arm is rotated closed, the first one-way tooth and the second one-way tooth disengage in transmission. When the right rocker arm is rotated open, the third one-way tooth and the fourth one-way tooth engage in transmission; when the right rocker arm is rotated closed, the third one-way tooth and the fourth one-way tooth disengage in transmission. The elastic engagement assembly includes a left spring and a right spring. The left spring is used to drive the left rocker arm to abut against the left gear to maintain the meshing of the first one-way tooth and the second one-way tooth. The right spring is used to drive the right rocker arm to abut against the right gear to maintain the meshing of the third one-way tooth and the fourth one-way tooth.

2. The transmission mechanism according to claim 1, characterized in that, The first one-way tooth and the fourth one-way tooth are clockwise one-way teeth, and the second one-way tooth and the third one-way tooth are counterclockwise one-way teeth. Both the clockwise one-way tooth and the counterclockwise one-way tooth have right-angled triangular tooth structures. The inclined tooth surface of the clockwise one-way tooth is inclined upward in a clockwise direction, and the inclined tooth surface of the counterclockwise one-way tooth is inclined upward in a counterclockwise direction.

3. A transmission mechanism according to claim 1 or 2, characterized in that, Both the left and right gears are integrally formed structures. The outer circumferential straight teeth of the left gear are concentrically arranged with the second one-way tooth on its end face, and the outer circumferential straight teeth of the right gear are concentrically arranged with the fourth one-way tooth on its end face.

4. A transmission mechanism according to claim 1 or 2, characterized in that, The armrest box includes a box body, and an installation platform is fixedly connected to the outer side of the box body. The left rocker arm, right rocker arm, left gear and right gear are all rotatably mounted on the installation platform.

5. A transmission mechanism according to claim 4, characterized in that, The elastic bonding assembly also includes a left pivot pressure block and a right pivot pressure block. Both the left pivot pressure block and the right pivot pressure block include a pivot portion. The top end of the pivot portion extends outward to form a pressing portion, and the bottom end of the pivot portion is fixedly connected to the mounting platform. The left spring, left rocker arm, and left gear are sequentially sleeved on the outer circumferential side of the rotating shaft portion of the left rotating shaft pressure block from top to bottom, so that the top end of the left spring abuts against the bottom surface of the lower pressing portion of the left rotating shaft pressure block, the bottom end of the left spring abuts against the top surface of the left rocker arm, and a left gap is left between the lower pressing portion of the left rotating shaft pressure block and the left rocker arm, the height of the left gap being greater than or equal to the tooth height of the first one-way tooth; The right-side spring, right rocker arm, and right-side gear are sequentially fitted onto the outer circumferential side of the right-side rotating shaft pressure block from top to bottom, such that the top end of the right-side spring abuts against the bottom surface of the lower pressing part of the right-side rotating shaft pressure block, the bottom end of the right-side spring abuts against the top surface of the right rocker arm, and a right-side gap is left between the lower pressing part of the right-side rotating shaft pressure block and the right rocker arm, the height of which is greater than or equal to the tooth height of the third unidirectional tooth.

6. A transmission mechanism according to claim 5, characterized in that, It also includes a left-side screw and a right-side screw. The mounting platform has an outwardly protruding left-side stud and a right-side stud spaced apart from the left-side stud. The left-side stud is inserted into the rotating shaft part of the left-side rotating shaft pressure block and then threadedly connected to the left-side screw. The right-side stud is inserted into the rotating shaft part of the right-side rotating shaft pressure block and then threadedly connected to the right-side screw.

7. A transmission mechanism according to claim 6, characterized in that, At least one slot is provided at the bottom of the rotating shaft portion of the left rotating shaft pressure block and at the bottom of the rotating shaft portion of the right rotating shaft pressure block. At least one protrusion extends outward from the bottom of the outer peripheral side of the left stud and the bottom of the outer peripheral side of the right stud to engage with the slot.

8. A transmission mechanism according to claim 6, characterized in that, The installation platform is also provided with a left guide groove around the outer periphery of the left stud and a right guide groove around the outer periphery of the right stud. The left gear extends toward the left guide groove and inserts into the left guide groove. The left guide part can slide along the left guide groove. The right gear extends toward the right guide groove and inserts into the right guide groove. The right guide part can slide along the right guide groove.

9. A transmission mechanism according to claim 5, characterized in that, The bottom surface of the lower pressing part of the left rotating shaft pressure block is provided with a left receiving groove for inserting one end of the left spring; the bottom surface of the lower pressing part of the right rotating shaft pressure block is provided with a right receiving groove for inserting one end of the right spring.

10. An armrest box, characterized in that, It includes a left door, a right door, and a box body. The left door is provided with a left pivot hinged to the box body, and the right door is provided with a right pivot hinged to the box body, so that both the left and right doors can be rotated relative to the box body. It also includes the transmission mechanism as described in any one of claims 1-9, wherein both the left and right doors are connected to the transmission mechanism in a transmission manner.

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