A hinge for connecting a commercial vehicle duster box cover plate

Abstract

The application relates to a hinge for connecting a commercial vehicle sundry box cover plate, comprising a first four-bar linkage motion pair, which comprises a fixed connecting rod, a first connecting arm and a second connecting arm are rotationally connected at one end of the fixed connecting rod, a third connecting arm is rotationally connected at a middle position of the first connecting arm, and the other end of the second connecting arm is rotationally connected with a middle position of the third connecting arm; a second four-bar linkage motion pair, which comprises a driving connecting rod, one end of the driving connecting rod is rotationally connected with the other end of the third connecting arm, and the one end of the driving connecting rod is also rotationally connected with a fourth connecting arm, and the other end of the fourth connecting arm is rotationally connected with the other end of the first connecting arm away from the fixed connecting rod. The hinge structure can make the gap between the sundry box cover plate and the sundry box body larger, so that the opening is not affected, when the sundry box cover plate is opened to the maximum angle, the hinge structure itself is limited to ensure that the sundry box cover plate is in a stable state after being completely opened, the appearance quality is effectively improved, and the cost is reduced.

Description

Technical Field

[0001] This application relates to the field of hinge technology, and in particular to a hinge for connecting the glove box cover of a commercial vehicle. Background Technology

[0002] Due to the need for ease of human-machine operation, the opening methods of the overhead storage compartment covers in vehicles are mainly divided into two types: upward-opening covers and downward-opening covers. For storage compartments located higher up, upward-opening covers are generally used. For storage compartments located slightly below eye level, downward-opening covers are more advantageous, as the opened cover does not obstruct the view and allows passengers to easily retrieve and place items from the storage compartment.

[0003] In related technologies, existing top-lid storage boxes employ a combination of a hinged structure, a pneumatic strut, and a two-point locking mechanism. The hinged structure secures the box lid to the box body and allows the lid to rotate and open around a pivot point. The pneumatic strut stabilizes the open lid, while the two-point locking mechanism stabilizes the closed lid.

[0004] However, using a hinge structure results in the hinge structure being exposed even when the storage box is closed, which is unsightly. Using a pneumatic strut is costly, and while it can stabilize the storage box lid, the support force and dimensions of the strut need to be controlled. Excessive support force will cause the box to spring open instantly, affecting safety, and the strut itself is also expensive.

[0005] Using pneumatic struts requires a more expensive dual-point locking mechanism for the glove box body. Currently, a single glove box cover on existing vehicles typically uses one pneumatic strut positioned on one side. When the glove box is closed, the compressed pneumatic strut continuously exerts an outward thrust on the cover, resulting in an uneven appearance where one end is higher than the other. A dual-point locking mechanism is needed to ensure proper alignment of the glove box cover and the glove box body. Summary of the Invention

[0006] This application provides a hinge for connecting the cover of a commercial vehicle's storage box, which solves the problems in related technologies where the use of hinge structures results in the storage box body being exposed when closed, affecting aesthetics, and also requires control of the support force and size of pneumatic struts, leading to high costs.

[0007] This application provides a hinge for connecting the cover of a commercial vehicle's glove compartment, comprising:

[0008] The first four-bar linkage pair, the first four-bar linkage pair includes a fixed link, one end of the fixed link is rotatably connected with a first connecting arm and a second connecting arm arranged at intervals, the middle position of the first connecting arm is rotatably connected with a third connecting arm, and the other end of the second connecting arm is rotatably connected with the middle position of the third connecting arm;

[0009] The second four-bar linkage pair, the second four-bar linkage pair includes a driving link, one end of the driving link is rotatably connected with the other end of the third connecting arm, one end of the driving link is also rotatably connected with a fourth connecting arm, and the other end of the fourth connecting arm is rotatably connected with the end of the first connecting arm far from the fixed link.

[0010] In some embodiments: the fixed link includes a fixing plate for fixing on the sundry box body, and a cantilever plate for rotatably connecting the first connecting arm and the second connecting arm is vertically connected to the fixing plate;

[0011] One end of the cantilever plate close to the fixing plate is rotatably connected with a first hinge shaft for connecting the first connecting arm;

[0012] One end of the cantilever plate far from the fixing plate is rotatably connected with a second hinge shaft for connecting the second connecting arm, and the first hinge shaft and the second hinge shaft are parallel and arranged at intervals.

[0013] In some embodiments: the first connecting arm includes two first ear plates arranged in parallel on both sides of the cantilever plate, and the two first ear plates are fixedly connected by a first connecting plate;

[0014] One end of the two first ear plates is rotatably connected with the cantilever plate through the first hinge shaft, and the other end of the two first ear plates is provided with a fourth hinge shaft for rotatably connecting the fourth connecting arm;

[0015] The middle position of the two first ear plates is provided with a third hinge shaft, and the third connecting arm is rotatably connected with the first connecting arm through the third hinge shaft.

[0016] In some embodiments: a positioning groove for limiting the third connecting arm is formed on the first ear plate, and the positioning groove is located between the first hinge shaft and the third hinge shaft;

[0017] The two first ear plates and the first connecting plate together form a "C" - shaped structure, and one end of the two first ear plates close to the cantilever plate extends out of the first connecting plate.

[0018] In some embodiments: the second connecting arm includes two second ear plates arranged in parallel on both sides of the cantilever plate, and the two second ear plates are fixedly connected by a second connecting plate;

[0019] One end of the second ear plate is rotatably connected to the cantilever plate through the second hinge shaft, and a seventh hinge shaft for rotatably connecting the third connecting arm is provided at the other end of the second ear plate.

[0020] In some embodiments: the two second ear plates and the second connecting plate together form a "C" - shaped structure, and both ends of the two second ear plates extend out of the second connecting plate, and both ends of the second ear plate are arc - shaped structures.

[0021] In some embodiments: the fourth connecting arm includes a straight segment rotatably connected to the first connecting arm and a bent segment rotatably connected to the active connecting rod, and the straight segment and the bent segment together form a "J" - shaped structure;

[0022] One end of the straight segment away from the bent segment is rotatably connected to the first connecting arm through a fourth hinge shaft, and one end of the bent segment away from the straight segment is rotatably connected to the active connecting rod through a fifth hinge shaft.

[0023] In some embodiments: the third connecting arm includes two third ear plates arranged in parallel, and the two third ear plates are fixedly connected by a third connecting plate;

[0024] One end of the third ear plate is rotatably connected to the first connecting arm through the third hinge shaft, and a sixth hinge shaft for rotatably connecting the active connecting rod is provided at the other end of the third ear plate;

[0025] A seventh hinge shaft for rotatably connecting the second connecting arm is provided at the middle position of the third ear plate, and the seventh hinge shaft is located between the third hinge shaft and the sixth hinge shaft.

[0026] In some embodiments: a limiting protrusion is provided on one side of the middle of the third ear plate close to the fourth connecting arm. When the limiting protrusion contacts the straight segment, it is used to limit the clockwise rotation of the active connecting rod around the sixth hinge shaft.

[0027] In some embodiments: the active connecting rod includes two fourth ear plates arranged in parallel on both sides of the third connecting arm, and the two fourth ear plates are fixedly connected by a fourth connecting plate, and an installation hole for fixing the debris box cover plate is provided on the fourth connecting plate;

[0028] One end of the fourth ear plate extends out of the fourth connecting plate and is rotatably connected to the third connecting arm through the sixth hinge shaft, the fifth hinge shaft is connected between the two fourth ear plates, and the fifth connecting arm is closer to the fourth connecting plate than the sixth hinge shaft.

[0029] The beneficial effects brought by the technical solutions provided in this application include:

[0030] This application provides a hinge for connecting a glove box cover of a commercial vehicle. The hinge includes a first four-bar linkage, comprising a fixed link, with a first connecting arm and a second connecting arm rotatably connected at one end of the fixed link, a third connecting arm rotatably connected at the middle of the first connecting arm, and the other end of the second connecting arm rotatably connected to the middle of the third connecting arm. A second four-bar linkage includes a driving link, with one end rotatably connected to the other end of the third connecting arm, and a fourth connecting arm rotatably connected to one end of the driving link. The other end of the fourth connecting arm is rotatably connected to the end of the first connecting arm away from the fixed link.

[0031] Therefore, the hinge for connecting the glove box cover of a commercial vehicle in this application adopts a six-bar linkage formed by the mutual rotational connection of a first four-bar linkage and a second four-bar linkage. When this hinge is used on a flip-down glove box cover, the hinge structure is not exposed when the glove box cover is not open, and the matching glove box cover locking mechanism is a low-cost single-point lock. During the opening of the glove box cover, this hinge structure can increase the gap between the glove box cover and the glove box body, thus not affecting the opening. When the glove box cover is opened to the maximum angle, the limiting function of the hinge structure itself ensures that the glove box cover is in a stable state after being fully opened, which can effectively improve the appearance quality and reduce costs. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the hinge in a folded state according to an embodiment of this application.

[0034] Figure 2 This is a schematic diagram of the hinge in an embodiment of this application when it is open at 80°.

[0035] Figure 3 This is a schematic diagram of the hinge in the 90° open state according to an embodiment of this application.

[0036] Figure 4 This is a schematic diagram of the hinge in the 160° open state according to an embodiment of this application.

[0037] Figure 5 This is a schematic diagram of the structure of the miscellaneous storage box body in the closed state according to an embodiment of this application;

[0038] Figure 6 This is a schematic diagram of the structure of the miscellaneous storage box body in the open state according to an embodiment of this application;

[0039] Figure 7 This is a schematic diagram illustrating the motion principle of the hinge in a folded state according to an embodiment of this application.

[0040] Figure 8 This is a schematic diagram illustrating the motion principle of the hinge in an 80° open state according to an embodiment of this application.

[0041] Figure 9 This is a schematic diagram illustrating the motion principle of the hinge in the 90° open state according to an embodiment of this application.

[0042] Figure 10 This is a schematic diagram illustrating the motion principle of the hinge in the 160° open state according to an embodiment of this application.

[0043] Figure 11 This is a schematic diagram of the structure of the first connecting arm according to an embodiment of this application;

[0044] Figure 12 This is a schematic diagram of the structure of the second connecting arm according to an embodiment of this application;

[0045] Figure 13 This is a schematic diagram of the structure of the third connecting arm in an embodiment of this application;

[0046] Figure 14 This is a schematic diagram of the structure of the fourth connecting arm in an embodiment of this application;

[0047] Figure 15 This is a schematic diagram of the active linkage in an embodiment of this application.

[0048] Figure label:

[0049] 1. Active link; 2. Fourth connecting arm; 3. Third connecting arm; 4. First connecting arm; 5. Second connecting arm; 6. Fixed link; 7. First hinge axis; 8. Second hinge axis; 9. Third hinge axis; 10. Fourth hinge axis; 11. Fifth hinge axis; 12. Sixth hinge axis; 13. Seventh hinge axis; 14. Storage box body; 15. Storage box cover; 16. Hinge; 17. First four-bar linkage; 18. Second four-bar linkage;

[0050] 21. Straight section; 22. Curved section; 31. Third ear plate; 32. Third connecting plate; 33. Limiting protrusion; 41. First ear plate; 42. First connecting plate; 43. Positioning groove; 51. Second ear plate; 52. Second connecting plate; 61. Fourth ear plate; 62. Fourth connecting plate; 63. Mounting hole. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0052] This application provides a hinge for connecting the cover of a commercial vehicle's storage box. It solves the problems in related technologies where the use of hinge structures results in the storage box being exposed when closed, affecting aesthetics, and also requires control of the support force and size of pneumatic struts, leading to high costs.

[0053] See Figures 1 to 6 As shown, this application embodiment provides a hinge for connecting a glove box cover of a commercial vehicle, comprising:

[0054] The first four-bar linkage 17 includes a fixed link 6. A first connecting arm 4 and a second connecting arm 5, spaced apart, are rotatably connected to one end of the fixed link 6. A third connecting arm 3 is rotatably connected to the middle of the first connecting arm 4. The other end of the second connecting arm 5 is rotatably connected to the middle of the third connecting arm 3. The fixed link 6, the first connecting arm 4, the second connecting arm 5, and the third connecting arm 3 together form a planar four-bar linkage. The first connecting arm 4 and the second connecting arm 5 are spaced apart. When the first connecting arm 4 and the second connecting arm 5 are in contact, the first four-bar linkage 17 is in a stable state.

[0055] The second four-bar linkage 18 includes a drive link 1, one end of which is rotatably connected to the other end of a third connecting arm 3. A fourth connecting arm 2 is also rotatably connected to one end of the drive link 1, and the other end of the fourth connecting arm 2 is rotatably connected to the end of a first connecting arm 4 away from the fixed link 6. The drive link 1, fourth connecting arm 2, first connecting arm 4, and third connecting arm 3 together form a planar four-bar linkage. The third connecting arm 3 and fourth connecting arm 2 are spaced apart from each other. When the third connecting arm 3 and fourth connecting arm 2 are in contact, the second four-bar linkage 18 is in a stable state.

[0056] The hinge 16 used in this application embodiment for connecting the cover of a commercial vehicle's storage compartment is a six-bar linkage formed by the mutual rotatable connection of a first four-bar linkage 17 and a second four-bar linkage 18. When the hinge 16 is used on a flip-down storage compartment cover 15, the hinge structure is not exposed when the storage compartment cover 15 is not open, and the matching storage compartment cover locking mechanism is a low-cost single-point lock. During the opening of the storage compartment cover 15, the hinge structure allows the gap between the storage compartment cover 15 and the storage compartment body 14 to increase, thus not affecting the opening. When the storage compartment cover 15 is opened to its maximum angle, the hinge structure itself limits the opening, ensuring that the storage compartment cover 15 is in a stable state after being fully opened, effectively improving the appearance quality and reducing costs.

[0057] In some alternative embodiments: see Figures 1 to 10 As shown in the embodiment of this application, a hinge for connecting the cover of a commercial vehicle's storage compartment is provided. The fixing link 6 of the hinge 16 includes a fixing plate for fixing to the storage compartment body 14. The fixing plate is fixed to the storage compartment body 14 by screws. A cantilever plate for rotatably connecting the first connecting arm 4 and the second connecting arm 5 is vertically connected to the fixing plate. The fixing plate and the cantilever plate are integrally stamped structures of steel plates with a thickness of 4-6mm.

[0058] A first hinge shaft 7 for connecting the first connecting arm 4 is rotatably connected to one end of the cantilever plate near the fixed plate, and a second hinge shaft 8 for connecting the second connecting arm 5 is rotatably connected to the other end of the cantilever plate away from the fixed plate. The cantilever plate has pin holes for the first hinge shaft 7 and the second hinge shaft 8 to pass through, and the first hinge shaft 7 and the second hinge shaft 8 are parallel to each other and spaced apart within the pin holes of the cantilever plate. The first connecting arm 4 and the second connecting arm 5 are rotatably connected to the cantilever plate of the fixed connecting rod 6 via the first hinge shaft 7 and the second hinge shaft 8, respectively.

[0059] In some alternative embodiments: see Figures 7 to 11 As shown in the embodiment of this application, a hinge for connecting the cover of a glove box in a commercial vehicle is provided. The first connecting arm 4 of the hinge 16 includes two parallel first ear plates 41 located on both sides of the cantilever plate, and the two first ear plates 41 are fixedly connected by a first connecting plate 42. The two first ear plates 41 and the first connecting plate 42 are integrally stamped structures made of steel plates with a thickness of 1-3mm. The first ear plates 41 and the first connecting plate 42 together form a "U"-shaped structure, and the ends of the two first ear plates 41 near the cantilever plate extend out of the first connecting plate 42, thereby mounting one end of the two first ear plates 41 on both sides of the cantilever plate.

[0060] One end of two first ear plates 41 is rotatably connected to the cantilever plate through a first hinge shaft 7, and the other ends of the two first ear plates 41 are provided with a fourth hinge shaft 10 for rotatably connecting to the fourth connecting arm 2. A third hinge shaft 9 is provided at the middle positions of the two first ear plates 41, and the third connecting arm 3 is rotatably connected to the first connecting arm 4 through the third hinge shaft 9. Pin holes for respectively penetrating the first hinge shaft 7, the third hinge shaft 9, and the fourth hinge shaft 10 are formed on both of the two first ear plates 41. The first hinge shaft 7, the third hinge shaft 9, and the fourth hinge shaft 10 are parallel to each other and arranged at intervals within the pin holes of the first connecting arm 4.

[0061] A positioning groove 43 for limiting the third connecting arm 3 is formed on the first ear plate 41, and the positioning groove 43 is located between the first hinge shaft 7 and the third hinge shaft 9; when the first connecting arm 4 and the second connecting arm 5 rotate counterclockwise around the cantilever plate of the fixed connecting rod 6 through the first hinge shaft 7 and the second hinge shaft 8 respectively until they contact each other, the end of the second connecting arm 5 away from the cantilever plate is located in the positioning groove 43 to limit the continuous rotation of the second connecting arm 5, and the rotation angle of the first connecting arm 4 and the second connecting arm 5 is increased.

[0062] In some alternative embodiments: Refer to Figures 7 to 12 As shown, the embodiment of the present application provides a hinge for connecting the sundry box cover of a commercial vehicle. The second connecting arm 5 of the hinge 16 includes two second ear plates 51 arranged in parallel on both sides of the cantilever plate, and the two second ear plates 51 are fixedly connected through a second connecting plate 52. The two second ear plates 51 and the second connecting plate 52 are integrally formed by stamping a steel plate with a thickness of 1 - 3 mm.

[0063] One end of the second ear plate 51 is rotatably connected to the cantilever plate through a second hinge shaft 8, and the other end of the second ear plate 51 is provided with a seventh hinge shaft 13 for rotatably connecting to the third connecting arm 3. Pin holes for respectively penetrating the second hinge shaft 8 and the seventh hinge shaft 13 are formed on both of the second ear plates 51. The second hinge shaft 8 and the seventh hinge shaft 13 are parallel to each other and arranged at intervals within the pin holes of the second connecting arm 5.

[0064] The two second ear plates 51 and the second connecting plate 52 together form a "C" - shaped structure, and both ends of the two second ear plates 51 extend beyond both ends of the second connecting plate 52, so that one end of the two second ear plates 51 is located on both sides of the cantilever plate, and the other end of the two second ear plates 51 is located on both sides of the third connecting arm 3. Both ends of the second ear plate 51 are of an arc - shaped structure, and the positioning groove 43 on the first ear plate 41 partially accommodates the second ear plate 51.

[0065] In some alternative embodiments: Refer to Figures 7 to 14As shown in the illustration, this application provides a hinge for connecting a glove box cover in a commercial vehicle. The fourth connecting arm 2 of the hinge 16 includes a straight segment 21 rotatably connected to the first connecting arm 4 and a curved segment 22 rotatably connected to the active connecting rod 1. The straight segment 21 and the curved segment 22 together form a "J" shape, which allows the glove box cover 15 to achieve a larger flipping angle. The straight segment 21 and the curved segment 22 are integrally stamped structures made of 1-3mm thick steel plates.

[0066] The end of the straight segment 21 away from the curved segment 22 is rotatably connected to the first connecting arm 4 via the fourth hinge shaft 10, and the end of the curved segment 22 away from the straight segment 21 is rotatably connected to the active connecting rod 1 via the fifth hinge shaft 11. The end of the straight segment 21 away from the curved segment 22 is provided with a pin hole for the fourth hinge shaft 10, and the end of the curved segment 22 away from the straight segment 21 is provided with a pin hole for the fifth hinge shaft 11. The fourth hinge shaft 10 and the fifth hinge shaft 11 are parallel to each other and spaced apart in the pin holes of the fourth connecting arm 2.

[0067] In some alternative embodiments: see Figures 7 to 13 As shown in the figure, this application embodiment provides a hinge for connecting the cover of a commercial vehicle's glove box. The third connecting arm 3 of the hinge 16 includes two parallel third ear plates 31, which are fixedly connected by a third connecting plate 32. The two third ear plates 31 and the third connecting plate 32 are integrally stamped structures made of steel plates with a thickness of 1-3mm.

[0068] One end of the third ear plate 31 is rotatably connected to the first connecting arm 4 via the third hinge shaft 9, and the other end of the third ear plate 31 is provided with a sixth hinge shaft 12 rotatably connected to the active connecting rod 1; a seventh hinge shaft 13 rotatably connected to the second connecting arm 5 is provided at the middle position of the third ear plate 31, and the seventh hinge shaft 13 is located between the third hinge shaft 9 and the sixth hinge shaft 12. Both third ear plates 31 are provided with pin holes through which the third hinge shaft 9, the sixth hinge shaft 12 and the seventh hinge shaft 13 pass, and the third hinge shaft 9, the sixth hinge shaft 12 and the seventh hinge shaft 13 are parallel to each other and spaced apart in the pin holes of the third connecting arm 3.

[0069] A limiting protrusion 33 is provided on the side of the third ear plate 31 near the fourth connecting arm 2. When the limiting protrusion 33 contacts the straight segment 21, it restricts the active connecting rod 1 from rotating clockwise around the sixth hinge axis 12. By adjusting the size of the limiting protrusion 33 protruding from the third ear plate 31, the maximum rotation angle of the active connecting rod 1 around the sixth hinge axis 12 can be adjusted.

[0070] In some alternative embodiments: see Figures 7 to 15As shown, this application embodiment provides a hinge for connecting a glove box cover of a commercial vehicle. The active link 1 of the hinge 16 includes two parallel fourth ear plates 61 located on both sides of the third connecting arm 3. The two fourth ear plates 61 are fixedly connected by a fourth connecting plate 62. The fourth connecting plate 62 is provided with mounting holes 63 for fixing the glove box cover 15. The two fourth ear plates 61 and the fourth connecting plate 62 are integrally stamped structures made of steel plates with a thickness of 1-3mm.

[0071] One end of the fourth ear plate 61 extends out of the fourth connecting plate 62 and is rotatably connected to the third connecting arm 3 via the sixth hinge shaft 12. The fifth hinge shaft 11 is connected between the two fourth ear plates 61, and the fifth hinge shaft 11 is closer to the fourth connecting plate 62 than the sixth hinge shaft 12. Each of the two fourth ear plates 61 has a pin hole through which the fifth hinge shaft 11 and the sixth hinge shaft 12 pass. The fifth hinge shaft 11 and the sixth hinge shaft 12 are parallel to each other and spaced apart within the pin holes of the active connecting rod 1.

[0072] Working principle

[0073] This application provides a hinge for connecting the glove box cover of a commercial vehicle. The hinge includes a first four-bar linkage 17, comprising a fixed link 6, with a first connecting arm 4 and a second connecting arm 5 rotatably connected at one end of the fixed link 6. A third connecting arm 3 is rotatably connected to the middle of the first connecting arm 4, and the other end of the second connecting arm 5 is rotatably connected to the middle of the third connecting arm 3. A second four-bar linkage 18 includes a driving link 1, with one end rotatably connected to the other end of the third connecting arm 3. A fourth connecting arm 2 is also rotatably connected to one end of the driving link 1, and the other end of the fourth connecting arm 2 is rotatably connected to the end of the first connecting arm 4 away from the fixed link.

[0074] Therefore, the hinge used to connect the glove box cover of a commercial vehicle in this application adopts a six-bar linkage formed by the mutual rotational connection of the first four-bar linkage 17 and the second four-bar linkage 18. When the hinge 16 is used on the flip-down glove box cover, the hinge structure is not exposed when the glove box cover 15 is not open, and the matching glove box cover locking mechanism is a low-cost single-point lock. During the opening of the glove box cover 15, the hinge structure can increase the gap between the glove box cover 15 and the glove box body 14, thus not affecting the opening. When the glove box cover 15 is opened to the maximum angle, the limiting of the hinge structure itself ensures that the glove box cover 15 is in a stable state after being fully opened, which can effectively improve the appearance quality and reduce costs.

[0075] See Figures 1 to 4 and Figures 7 to 10As shown, in actual use, the fixing link 6 fixes the entire hinge 16 to the miscellaneous box body 14.

[0076] When the storage box is closed, the hinge points of the third connecting arm 3 and the second connecting arm 5 are restricted by the shape of the first connecting arm 4, so that the first four-bar linkage 17 formed by the third connecting arm 3, the first connecting arm 4, the second connecting arm 5 and the fixed link 6 is in a stable state, the fourth connecting arm 2 and the active link 1 are also in a stable state, and the second four-bar linkage 18 is also in a stable state.

[0077] When the miscellaneous box cover 15 is opened halfway, since the first four-bar linkage 17 and the second four-bar linkage 18 are not restricted by their own structure, both the first four-bar linkage 17 and the second four-bar linkage 18 are unstable parallelograms and can continue to flip.

[0078] When the active connecting rod 1 and the third connecting arm 3 are collinear, and the miscellaneous box cover 15 is opened to 90°, the second four-bar linkage 18 forms a triangle. However, since the fourth connecting arm 2 has a "J" shaped structure, the second four-bar linkage 18 is not stable and thus forms a concave quadrilateral. The miscellaneous box cover 15 can continue to flip and open to a larger angle.

[0079] When the storage box cover 15 is fully open, the fourth connecting arm 2 is limited by the limiting protrusion 33 of the third connecting arm 3, and the second four-bar linkage 18 forms two triangles in a stable state, thus stabilizing the third connecting arm 3 and the first connecting arm 4. The fixed link 6 is also a fixed link, meaning the first four-bar linkage 17 is also stable. The opening angle of the storage box cover 15 can reach 160 degrees, meeting the ergonomic requirements of a flip-down storage box. The size of the limiting protrusion 33 of the third connecting arm 3 or the shape of the curved section 22 of the fourth connecting arm 2 can be adjusted as needed to achieve a larger opening angle.

[0080] In the description of this application, it should be noted that the terms "upper," "lower," 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 application and simplifying the description, and do not 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 application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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 between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0081] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0082] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A hinge for connecting a commercial vehicle duster box cover plate, characterized in that, Comprise: The first four-bar linkage (17) includes a fixed connecting rod (6), one end of which is rotatably connected with a first connecting arm (4) and a second connecting arm (5) arranged at intervals, the middle part of the first connecting arm (4) is rotatably connected with a third connecting arm (3), and the other end of the second connecting arm (5) is rotatably connected with the middle part of the third connecting arm (3); The second four-bar linkage (18) includes a driving connecting rod (1), one end of which is rotatably connected with the other end of the third connecting arm (3), and the other end of the driving connecting rod (1) is rotatably connected with a fourth connecting arm (2), and the other end of the fourth connecting arm (2) is rotatably connected with one end of the first connecting arm (4) away from the fixed connecting rod (6); The fourth connecting arm (2) includes a straight segment (21) rotatably connected with the first connecting arm (4) and a curved segment (22) rotatably connected with the driving connecting rod (1), and the straight segment (21) and the curved segment (22) together form a "J" shape structure; One end of the straight segment (21) away from the curved segment (22) is rotatably connected with the first connecting arm (4) through a fourth hinge shaft (10), and the other end of the curved segment (22) away from the straight segment (21) is rotatably connected with the driving connecting rod (1) through a fifth hinge shaft (11); The third connecting arm (3) includes two third ear plates (31) arranged in parallel, and the two third ear plates (31) are fixedly connected through a third connecting plate (32); One end of the third ear plate (31) is rotatably connected with the first connecting arm (4) through a third hinge shaft (9), and the other end of the third ear plate (31) is provided with a sixth hinge shaft (12) rotatably connected with the driving connecting rod (1); The middle part of the third ear plate (31) is provided with a seventh hinge shaft (13) rotatably connected with the second connecting arm (5), and the seventh hinge shaft (13) is located between the third hinge shaft (9) and the sixth hinge shaft (12); The middle part of the third ear plate (31) is provided with a limiting protrusion (33) close to one side of the fourth connecting arm (2), and when the limiting protrusion (33) is in contact with the straight segment (21), the clockwise rotation of the driving connecting rod (1) around the sixth hinge shaft (12) is limited.

2. The hinge for connecting the cover plate of the commercial vehicle litter box according to claim 1, wherein: The fixed connecting rod (6) includes a fixed plate for being fixed on the litter box body (14), and a cantilever plate for rotatably connecting the first connecting arm (4) and the second connecting arm (5) is vertically connected on the fixed plate; A first hinge shaft (7) for connecting the first connecting arm (4) is rotatably connected on one end of the cantilever plate close to the fixed plate; A second hinge shaft (8) for connecting the second connecting arm (5) is rotatably connected on the other end of the cantilever plate away from the fixed plate, and the first hinge shaft (7) and the second hinge shaft (8) are parallel and arranged at intervals.

3. The hinge for connecting the cover plate of the commercial vehicle litter box according to claim 2, characterized in that: the first connecting arm (4) comprises two first ear plates (41) arranged in parallel on both sides of the cantilever plate, and the two first ear plates (41) are fixedly connected by a first connecting plate (42); one end of the two first ear plates (41) is rotatably connected with the cantilever plate through the first hinge shaft (7), and the other end of the two first ear plates (41) is provided with a fourth hinge shaft (10) for rotatably connecting the fourth connecting arm (2); the middle part of the two first ear plates (41) is provided with a third hinge shaft (9), and the third connecting arm (3) is rotatably connected with the first connecting arm (4) through the third hinge shaft (9).

4. The hinge for connecting the cover plate of the commercial vehicle litter box according to claim 3, characterized in that: a positioning groove (43) for limiting the second connecting arm (5) is formed on the first ear plate (41), and the positioning groove (43) is located between the first hinge shaft (7) and the third hinge shaft (9); the two first ear plates (41) and the first connecting plate (42) jointly form a "D" shaped structure, and one end of the two first ear plates (41) close to the cantilever plate extends out of the first connecting plate (42).

5. The hinge for connecting the cover plate of the commercial vehicle litter box according to claim 2, characterized in that: the second connecting arm (5) comprises two second ear plates (51) arranged in parallel on both sides of the cantilever plate, and the two second ear plates (51) are fixedly connected by a second connecting plate (52); one end of the second ear plate (51) is rotatably connected with the cantilever plate through the second hinge shaft (8), and the other end of the second ear plate (51) is provided with a seventh hinge shaft (13) for rotatably connecting the third connecting arm (3).

6. The hinge for connecting the cover plate of the commercial vehicle litter box according to claim 5, characterized in that: the two second ear plates (51) and the second connecting plate (52) jointly form a "D" shaped structure, and both ends of the two second ear plates (51) extend out of the second connecting plate (52), and both ends of the second ear plate (51) are in a circular arc structure.

7. The hinge for connecting the cover plate of the commercial vehicle litter box according to claim 1, characterized in that: the driving connecting rod (1) comprises two fourth ear plates (61) arranged in parallel on both sides of the third connecting arm (3), and the two fourth ear plates (61) are fixedly connected by a fourth connecting plate (62), and the fourth connecting plate (62) is provided with a mounting hole (63) for fixing the litter box cover plate (15); one end of the fourth ear plate (61) extends out of the fourth connecting plate (62) and is rotatably connected with the third connecting arm (3) through the sixth hinge shaft (12), and the fifth hinge shaft (11) is connected between the two fourth ear plates (61), and the fifth hinge shaft (11) is closer to the fourth connecting plate (62) than the sixth hinge shaft (12).

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