Door and window system of cab

Abstract

The utility model discloses a cab door and window system, and relates to the technical field of cabs, the cab door and window system comprises a cab sheet metal part, a door sheet metal part, door window glass, a first door and window hinge assembly, a second door and window hinge assembly and a door hinge assembly. The door sheet metal part is installed on the cab sheet metal part, the door window glass is installed on the door sheet metal part, the first door window hinge assembly is connected with the cab sheet metal part, the door sheet metal part and the door window glass, and the first door window hinge assembly is used for allowing the door window glass to be rotationally opened relative to the door sheet metal part and further used for allowing the door sheet metal part to be rotationally opened relative to the cab sheet metal part. The second door and window hinge assembly is connected with the door sheet metal part and the door and window glass and used for allowing the door and window glass to rotate and open relative to the door sheet metal part, and the door hinge assembly is connected with the cab sheet metal part and the door sheet metal part and used for allowing the door sheet metal part to rotate and open relative to the cab sheet metal part. The cab door and window system solves the problems that flexibility is insufficient and operation is inconvenient when the door and the window are opened independently.

Description

Technical Field

[0001] This application relates to the field of driver's cab technology, and in particular to a driver's cab door and window system. Background Technology

[0002] Currently, the existing cab doors and windows of telescopic forklifts mainly consist of a door divided into upper and lower sections, with the upper section opening independently as a window. This design is structurally complex, costly, and requires high precision in the fitting of various components. Furthermore, opening the window is cumbersome (the window itself accounts for half the weight of the door), and the door and window operate inefficiently when opened independently, resulting in inconvenient operation and poor ergonomics. Therefore, given this situation, a new door and window design is urgently needed to address the shortcomings of the aforementioned structural design. Utility Model Content

[0003] The purpose of this application is to provide a driver's cab door and window system that solves the problems of insufficient flexibility and inconvenient operation when doors and windows are opened independently.

[0004] To achieve the above objectives, this application provides a driver's cab door and window system, comprising:

[0005] Driver's cab sheet metal parts;

[0006] Door sheet metal parts, installed on the driver's cab sheet metal parts;

[0007] Window and door glass, installed on the door sheet metal parts;

[0008] The first door and window hinge assembly connects the driver's cab sheet metal parts, the door sheet metal parts, and the door and window glass. It is used to allow the door and window glass to rotate and open relative to the door sheet metal parts, and also to allow the door sheet metal parts to rotate and open relative to the driver's cab sheet metal parts.

[0009] The second door and window hinge assembly connects the door sheet metal and the door and window glass, and is used to allow the door and window glass to rotate and open relative to the door sheet metal.

[0010] The door hinge assembly connects the driver's cab sheet metal parts and the door sheet metal parts, and is used to allow the door sheet metal parts to rotate and open relative to the driver's cab sheet metal parts.

[0011] In some embodiments, the first door / window hinge assembly includes:

[0012] First pin;

[0013] The first connecting page is hinged to the first pin and connected to the sheet metal parts of the driver's cab;

[0014] The second connecting page is hinged to the first pin and connected to the door sheet metal parts;

[0015] The third connecting page is hinged to the first pin and connected to the door and window glass.

[0016] In some embodiments, the second connecting page includes a hinge portion and a connecting page body integrally disposed with the hinge portion, the connecting page body being disposed on the side of the third connecting page near the door / window glass.

[0017] In some embodiments, the second door / window hinge assembly includes:

[0018] Second pin;

[0019] The fourth connecting page is hinged to the second pin and connected to the door sheet metal parts;

[0020] The fifth connecting page is hinged to the second pin and connected to the door and window glass;

[0021] The elastic element is fitted onto the second pin, and its two ends are connected to the fourth and fifth connecting pages respectively. The elastic element is used to provide elastic force to the fifth connecting page, so that the door and window glass tends to close.

[0022] In some embodiments, the driver's cab door and window system further includes door and window sealing strips, which include:

[0023] The built-in snap-fit ​​part is used to snap onto the door sheet metal parts;

[0024] The sealing part is integrally formed with the snap-fit ​​part. The sealing part has a protrusion and several spaced protrusions. The protrusions abut against the door sheet metal parts, and each protrusion abuts against the door and window glass.

[0025] In some embodiments, the driver's cab door and window system further includes:

[0026] The latch lock body is located on the sheet metal parts of the driver's cab;

[0027] The latch is installed on the glass of doors and windows and is used to engage with the latch body after the glass of doors and windows is opened to a preset angle to fix the glass of doors and windows.

[0028] In some embodiments, the driver's cab door and window system further includes:

[0029] The latch cable connects to the latch lock body and is used to trigger the latch lock body and latch latch to unlock;

[0030] The bumper lock handle is located on the sheet metal part of the driver's cab and is connected to the bumper lock cable. It is used to operate the bumper lock cable to unlock the bumper lock body and the bumper lock latch.

[0031] In some embodiments, the driver's cab door and window system further includes a locking handle rotatably connected to the door and window glass, the locking handle having a guide groove to allow the locking handle to rotate between a locked position and an unlocked position.

[0032] In some embodiments, the driver's cab door and window system further includes a handrail, which is located on the side of the door and window glass away from the first door and window hinge assembly. One end of the handrail is connected to the first door and window hinge assembly, the middle part of the handrail is connected to the second door and window hinge assembly, and the other end of the handrail is fixed to the door and window glass by a handrail mounting plate, which is located on the side of the door and window glass away from the handrail.

[0033] In some embodiments, a first elastic pad is provided between the first door and window hinge assembly and the door and window glass, and between the second door and window hinge assembly and the door and window glass;

[0034] A second elastic pad is provided between one end of the handrail and the glass of the door or window, and between the middle of the handrail and the glass of the door or window;

[0035] A third elastic pad is provided between the handrail mounting plate and the door / window glass;

[0036] The glass of the doors and windows is provided with several threaded holes, and both the first elastic pad and the second elastic pad are provided with bosses that are embedded in the threaded holes.

[0037] Compared to the aforementioned background technology, the driver's cab door and window system provided in this application embodiment includes a driver's cab sheet metal part, a door sheet metal part, door and window glass, a first door and window hinge assembly, a second door and window hinge assembly, and a door hinge assembly. The door sheet metal part is mounted on the driver's cab sheet metal part, and the door and window glass is mounted on the door sheet metal part. The first door and window hinge assembly connects the driver's cab sheet metal part, the door sheet metal part, and the door and window glass. The first door and window hinge assembly is used to allow the door and window glass to rotate and open relative to the door sheet metal part, and also to allow the door sheet metal part to rotate and open relative to the driver's cab sheet metal part. The second door and window hinge assembly connects the door sheet metal part and the door and window glass. The second door and window hinge assembly is used to allow the door and window glass to rotate and open relative to the door sheet metal part. The door hinge assembly connects the driver's cab sheet metal part and the door sheet metal part, and is used to allow the door sheet metal part to rotate and open relative to the driver's cab sheet metal part.

[0038] The advantages of this driver's cab door and window system primarily include: By incorporating a first and a second door and window hinge assembly, the window glass can be easily and flexibly rotated and opened relative to the door sheet metal. Furthermore, the three-hinge design allows for flexible and convenient independent opening of the windows and doors, with each window rotating independently without interference. This satisfies the need for independent window and door opening while ensuring the overall opening functionality of the door sheet metal and window glass. In addition, the driver's cab door and window system with this design has a simple overall structure, low production cost, and is easy to operate, improving human-machine comfort. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0040] Figure 1 This is a front view of the driver's cab door and window system in an embodiment of this application;

[0041] Figure 2 This is a rear view of the driver's cab door and window system in an embodiment of this application;

[0042] Figure 3 This is a schematic diagram showing the window glass of the driver's cab door and window system in the open state in an embodiment of this application;

[0043] Figure 4 for Figure 1 A schematic diagram of the first door and window hinge assembly in the driver's cab door and window system shown.

[0044] Figure 5 for Figure 1 A schematic diagram of the second door and window hinge assembly in the driver's cab door and window system shown.

[0045] Figure 6 for Figure 5 A schematic diagram of the second door and window hinge assembly from another angle;

[0046] Figure 7 for Figure 1 A schematic diagram of the door hinge assembly in the driver's cab door and window system shown.

[0047] Figure 8 for Figure 1 The diagram shows a cross-sectional view of AA in the driver's cab door and window system.

[0048] Figure 9 for Figure 8 Assembly diagram of the first and second elastic pads;

[0049] Figure 10 for Figure 8 Assembly diagram of door and window sealing strips and door sheet metal parts;

[0050] Figure 11 for Figure 1 The diagram shows the connection of the bumper lock body, bumper lock latch, bumper lock cable and bumper lock handle in the driver's cab door and window system.

[0051] Figure 12 for Figure 1The diagram shows the operation of the locking handle in the driver's cab door and window system.

[0052] Figure 13 for Figure 12 The diagram shows another angle of the locking handle.

[0053] in:

[0054] 10- Driver's cab sheet metal parts;

[0055] 20-Door sheet metal parts;

[0056] 30 - Door and window glass;

[0057] 40-First door and window hinge assembly, 41-First pin, 42-First connecting page, 43-Second connecting page, 431-Hinge part, 432-Connecting page body, 44-Third connecting page;

[0058] 50-Second door and window hinge assembly, 51-Second pin, 52-Fourth connecting page, 53-Fifth connecting page, 54-Elastic element;

[0059] 60-Door hinge assembly, 61-Third pin, 62-Sixth connecting page, 63-Seventh connecting page;

[0060] 70-Door and window sealing strip, 71-Snap-fit ​​part, 711-Snap-fit ​​frame, 72-Sealing part, 721-Protrusion, 722-Protrusion point;

[0061] 80-Limit component, 81-Bump lock body, 82-Bump lock latch, 821-Latch elastic pad, 822-Latch mounting plate, 83-Bump lock cable, 84-Bump lock handle;

[0062] 90-Locking assembly, 91-Locking handle, 911-Guide groove, 92-Rotating shaft, 93-Handle mounting plate, 94-Handle elastic pad, 95-Torsion spring;

[0063] 100 - Handrail, 101 - Handrail mounting plate, 102 - Third elastic pad;

[0064] 110 - First elastic pad;

[0065] 120 - Second elastic pad;

[0066] 130 - convex surface. Detailed Implementation

[0067] 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, and 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.

[0068] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0069] Please see Figure 1 , Figure 2 and Figure 3 The driver's cab door and window system provided in this application embodiment includes driver's cab sheet metal 10, door sheet metal 20 and door and window glass 30.

[0070] The door sheet metal part 20 is installed on the driver's cab sheet metal part 10. The door sheet metal part 20 can be rotated and opened relative to the driver's cab sheet metal part 10. The door and window glass 30 is installed on the door sheet metal part 20. The door and window glass 30 can be rotated and opened relative to the door sheet metal part 20.

[0071] Therefore, the driver's cab door and window system also includes a first door and window hinge assembly 40, a second door and window hinge assembly 50, and a door hinge assembly 60.

[0072] The first door and window hinge assembly 40 connects the driver's cab sheet metal part 10, the door sheet metal part 20, and the door and window glass 30. The first door and window hinge assembly 40 is used to allow the door and window glass 30 to rotate and open relative to the door sheet metal part 20, and also to allow the door sheet metal part 20 to rotate and open relative to the driver's cab sheet metal part 10.

[0073] The second door and window hinge assembly 50 connects the door sheet metal 20 and the door and window glass 30. The second door and window hinge assembly 50 is used to allow the door and window glass 30 to rotate and open relative to the door sheet metal 20.

[0074] The door hinge assembly 60 connects the driver's cab sheet metal part 10 and the door sheet metal part 20. The door hinge assembly 60 is used to allow the door sheet metal part 20 to rotate and open relative to the driver's cab sheet metal part 10.

[0075] By setting up a first door and window hinge assembly 40 and a second door and window hinge assembly 50, the door and window glass 30 can be flexibly and conveniently rotated and opened relative to the door sheet metal 20. By setting up a first door and window hinge assembly 40 and a door hinge assembly 60, the door sheet metal 20 can be flexibly and conveniently rotated and opened relative to the driver's cab sheet metal 10. In other words, the design of three hinges enables the driver's cab door and window system to have a flexible and convenient independent opening method for the doors and windows, and they can rotate independently without interference. This satisfies the independent opening requirements of the door and window glass 30, while also ensuring the overall opening function of the door sheet metal 20 and the door and window glass 30.

[0076] In addition, the driver's cab door and window system with the above design has a simple overall structure, low production cost, and is easy to operate, thus improving human-machine comfort.

[0077] In some embodiments, the first door and window hinge assembly 40 includes a first pin 41, a first connecting leaf 42, a second connecting leaf 43, and a third connecting leaf 44. The first connecting leaf 42 is hinged to the first pin 41 and connected to the driver's cab sheet metal 10; the second connecting leaf 43 is hinged to the first pin 41 and connected to the door sheet metal 20; the third connecting leaf 44 is hinged to the first pin 41 and connected to the door and window glass 30.

[0078] Please refer to the following: Figure 4 The second connecting page 43 includes a hinge portion 431 and a connecting page body 432 integrally formed with the hinge portion 431. The connecting page body 432 is located on the side of the third connecting page 44 closest to the door / window glass 30. That is, the connecting page body 432 and the door / window glass 30 are located on the same side of the third connecting page 44.

[0079] Please refer to the following: Figure 5 and Figure 6 The second door and window hinge assembly 50 also includes a second pin 51, a fourth connecting page 52 and a fifth connecting page 53. The fourth connecting page 52 is hinged to the second pin 51 and connected to the door sheet metal 20. The fifth connecting page 53 is hinged to the second pin 51 and connected to the door and window glass 30.

[0080] It can be seen that the structure of the second door and window hinge assembly 50 can be referred to as the remaining part of the first door and window hinge assembly 40 excluding the first connecting page 42.

[0081] When both the window / door glass 30 and the door sheet metal 20 are closed, the first connecting page 42 and the third connecting page 44 are nearly in the same plane (the included angle between them is 180 degrees), the connecting page body 432 is parallel to the third connecting page 44, and the fourth connecting page 52 is parallel to the fifth connecting page 53. Thus, when the window / door glass 30 is opened, the maximum rotation angle of the third connecting page 44 relative to the second connecting page 43 can reach 180 degrees (the third connecting page 44 can rotate to a point where it is almost touching the first connecting page 42), and the maximum rotation angle of the fifth connecting page 53 relative to the fourth connecting page 52 can also reach 180 degrees.

[0082] It should be noted that in the prior art, for driver's cab door and window systems using operable windows, this method, due to structural limitations, can only open to a small size, and some openings may not even extend to their maximum extent, making it impossible to identify some blind spots for the driver and causing great inconvenience to the operation of the entire machine. In contrast, the driver's cab door and window system provided in this application embodiment adopts the aforementioned first door and window hinge assembly 40 and second door and window hinge assembly 50, so that the door and window glass 30 can be flexibly and conveniently rotated and opened relative to the door sheet metal 20, and the opening angle of the door and window glass 30 relative to the door sheet metal 20 can reach 180 degrees, greatly satisfying the driver's cab's requirements for the size of the window opening and bringing great convenience to the operation of the entire machine.

[0083] In addition, to facilitate the automatic reset function of the window glass 30 relative to the door sheet metal 20, the second window hinge assembly 50 also includes an elastic element 54, which can be a torsion spring. The elastic element 54 is sleeved on the second pin 51, and the two ends of the elastic element 54 are respectively connected to the fourth connecting page 52 and the fifth connecting page 53. The elastic element 54 is used to provide elastic force to the fifth connecting page 53, so that the window glass 30 has the tendency to reset (close) after opening.

[0084] Please refer to the following: Figure 7 The door hinge assembly 60 includes a third pin 61, a sixth connecting page 62, and a seventh connecting page 63. The sixth connecting page 62 and the seventh connecting page 63 are hinged to the third pin 61. The sixth connecting page 62 is connected to the driver's cab sheet metal part 10, and the seventh connecting page 63 is hinged to the third pin 61 and connected to the door sheet metal part 20.

[0085] Thus, by assembling the first door and window hinge assembly 40 and the door hinge assembly 60, the door sheet metal part 20 can be flexibly and conveniently rotated and opened relative to the driver's cab sheet metal part 10. The maximum opening angle of the door sheet metal part 20 relative to the driver's cab sheet metal part 10 can also reach 180 degrees.

[0086] In some embodiments, the driver's cab door and window system further includes a handrail 100, which is disposed on the side of the door and window glass 30 away from the first door and window hinge assembly 40. One end of the handrail 100 is connected to the first door and window hinge assembly 40, the middle part of the handrail 100 is connected to the second door and window hinge assembly 50, and the other end of the handrail 100 is fixed to the door and window glass 30 by a handrail mounting plate 101, which is disposed on the side of the door and window glass 30 away from the handrail 100.

[0087] In this embodiment, a first elastic pad 110 is provided between the first door and window hinge assembly 40 and the door and window glass 30, and between the second door and window hinge assembly 50 and the door and window glass 30; a second elastic pad 120 is provided between one end of the handrail 100 and the door and window glass 30, and between the middle part of the handrail 100 and the door and window glass 30; a third elastic pad 102 is provided between the handrail mounting plate 101 and the door and window glass 30.

[0088] The window glass 30 is provided with several threaded holes, which are used to engage with countersunk screws or bolt threads.

[0089] Please refer to the following: Figure 8 , Figure 9 and Figure 10 To address the potential for water leakage, both the first elastic pad 110 and the second elastic pad 120 are provided with protrusions 130 embedded in threaded holes. Meanwhile, the driver's cab door and window system also includes a door and window sealing strip 70. The door and window sealing strip 70 includes a snap-fit ​​part 71 and a sealing part 72. The snap-fit ​​part 71 has a built-in snap-fit ​​frame 711 to snap the door and window sealing strip 70 onto the door sheet metal part 20. The sealing part 72 is integrally formed with the snap-fit ​​part 71. The sealing part 72 has protrusions 721 and several spaced protrusions 722. The protrusions 721 abut against the door sheet metal part 20, and each protrusion 722 abuts against the door and window glass 30.

[0090] Specifically, the window glass 30 is sealed by a window sealing strip 70. This window sealing strip 70 uses EPDM rubber and has an embedded steel frame. The strip is crescent-shaped with bubbles and has three protrusions 722 for sealing with the glass. In addition, a U-shaped tail (protrusion 721) is designed to form the first seal with the door sheet metal 20. The threaded holes on each hinge are reinforced with a first elastic pad 110 and a second elastic pad 120. The first elastic pad 110 and the second elastic pad 120 are respectively reinforced with a boss 130. The boss 130 on the first elastic pad 110 and the second elastic pad 120 are designed with an interference fit. The design of this boss 130 not only avoids vibration contact between the bolt and the window glass 30, but also forms a seal on the threaded hole by compression deformation when the bolt is tightened, completely solving the problem of water entering the threaded hole. This structure is not only used here, but all the threaded holes on the window glass 30 use this structure.

[0091] Please refer to the following: Figure 11 The driver's cab door and window system also includes a limiting component 80, which includes a latch lock body 81 and a latch lock buckle 82. The latch lock body 81 is mounted on the sheet metal part 10 of the driver's cab, and the latch lock buckle 82 is mounted on the door and window glass 30. The latch lock buckle 82 is used to engage with the latch lock body 81 after the door and window glass 30 is opened to a preset angle to fix the door and window glass 30.

[0092] For example, the latch lock body 81 is equipped with a lock cylinder. After the door and window glass 30 is opened to a preset angle, the latch lock latch 82 automatically engages with the lock cylinder of the latch lock body 81 to fix the door and window glass 30.

[0093] To facilitate unlocking, the limiting assembly 80 also includes a latching cable 83 and a latching handle 84. The latching cable 83 is connected to the latching lock body 81 and is used to trigger the unlocking of the latching lock body 81 and the latching latch 82. The latching handle 84 is located on the seat accessory sheet metal of the driver's cab sheet metal part 10 and is connected to the latching cable 83. The latching handle 84 is used to operate the latching cable 83 to unlock the latching lock body 81 and the latching latch 82.

[0094] Specifically, the latch 82 is U-shaped. The latch 82 on the window glass 30 is engaged with the latch lock body 81 to limit the window glass 30. When unlocking is required, the latch can be unlocked by pressing the latch handle 84. After unlocking, the window glass 30 can be automatically reset by the elastic element 54 of the second window hinge assembly 50, making unlocking more convenient.

[0095] Please refer to the following: Figure 12 and Figure 13 The driver's cab door and window system also includes a locking assembly 90, which includes a locking handle 91 rotatably connected to the door and window glass 30. The locking handle 91 is provided with a guide groove 911 to allow the locking handle 91 to rotate between a locked position and an unlocked position.

[0096] Specifically, the locking assembly 90 provided in this embodiment consists of a locking handle 91 and a door sheet metal bracket. The locking handle 91 is provided with a pivot 92, and the door / window glass 30 is fixed by the rotation of the locking handle 91 and clamping it with the door sheet metal bracket. The locking handle 91 is provided with a guide groove 911 to facilitate the clamping and fixing of the locking handle 91. Under the action of the guide groove 911, the locking handle 91 can be in the locking position ( Figure 12 (C position in the middle) and unlock position ( Figure 12 To unlock, simply rotate the locking handle 91 from position C to position D. Additionally, a torsion spring 95 is provided on the locking handle 91 for self-locking, preventing the locking handle 91 from loosening during vibration.

[0097] When installing the driver's cab door and window system, first weld the second connecting page 43 of the first door and window hinge assembly 40 and the fourth connecting page 52 of the second door and window hinge assembly 50 to the door sheet metal 20. Then, together with the door hinge assembly 60, install it onto the driver's cab sheet metal 10 using countersunk screws. Afterward, connect the door and window glass 30, the first elastic pad 110 between the first door and window hinge assembly 40 and the door and window glass 30, the first elastic pad 110 between the second door and window hinge assembly 50 and the door and window glass 30, the handrail 100, and the second elastic pad 120 to the first door and window hinge assembly 40 and the second door and window hinge assembly 50 respectively using countersunk screws. After fixing the hinge assembly 50 of the two doors and windows, the handrail mounting plate 101 and the third elastic pad 102 are fixed to the handrail 100 with bolts; then the latch lock buckle 82, the latch elastic pad 821, and the latch mounting plate 822 are fixed to the door and window glass 30 with bolts; the door and window sealing strip 70 is snapped onto the door sheet metal 20; then the handle mounting plate 93, the handle elastic pad 94, and the locking handle 91 are fixed to the door and window glass 30 with bolts; finally, the latch lock cable 83, the latch lock body 81, and the latch lock handle 84 are fixed to the driver's cab sheet metal 10 with bolts.

[0098] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0099] The driver's cab door and window system provided in this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the solution and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. A driver's cab door and window system, characterized in that, include: Driver's cab sheet metal parts; Door sheet metal parts are installed on the driver's cab sheet metal parts; The glass for doors and windows is installed on the door sheet metal parts; The first door and window hinge assembly connects the driver's cab sheet metal, the door sheet metal, and the door and window glass, and is used to allow the door and window glass to rotate and open relative to the door sheet metal, and also to allow the door sheet metal to rotate and open relative to the driver's cab sheet metal. The second door and window hinge assembly connects the door sheet metal and the door and window glass, and is used to allow the door and window glass to rotate and open relative to the door sheet metal. A door hinge assembly connects the driver's cab sheet metal part and the door sheet metal part, and is used to allow the door sheet metal part to rotate and open relative to the driver's cab sheet metal part.

2. The driver's cab door and window system as described in claim 1, characterized in that, The first door and window hinge assembly includes: First pin; The first connecting page is hinged to the first pin and connected to the sheet metal part of the driver's cab; The second connecting page is hinged to the first pin and connected to the door sheet metal part; The third connecting page is hinged to the first pin and connected to the door / window glass.

3. The driver's cab door and window system as described in claim 2, characterized in that, The second connecting page includes a hinge portion and a connecting page body integrally formed with the hinge portion, the connecting page body being located on the side of the third connecting page near the door / window glass.

4. The driver's cab door and window system as described in claim 1, characterized in that, The second door and window hinge assembly includes: Second pin; The fourth connecting page is hinged to the second pin and connected to the door sheet metal part; The fifth connecting page is hinged to the second pin and connected to the door / window glass; An elastic element is sleeved on the second pin, and its two ends are respectively connected to the fourth connecting page and the fifth connecting page. The elastic element is used to provide elastic force to the fifth connecting page, so that the door and window glass tends to close.

5. The driver's cab door and window system as described in any one of claims 1-4, characterized in that, The driver's cab door and window system also includes door and window sealing strips, which include: The snap-fit ​​part with a built-in snap-fit ​​frame is used to snap onto the door sheet metal part; The sealing part is integrally formed with the snap-fit ​​part. The sealing part has a protrusion and a number of spaced protrusions. The protrusion abuts against the door sheet metal part, and each of the protrusions abuts against the door and window glass.

6. The driver's cab door and window system as described in any one of claims 1-4, characterized in that, The driver's cab door and window system also includes: The latch lock body is mounted on the sheet metal part of the driver's cab; A latch is provided on the door or window glass and is used to engage with the latch body after the door or window glass is opened to a preset angle to fix the door or window glass.

7. The driver's cab door and window system as described in claim 6, characterized in that, The driver's cab door and window system also includes: A latching cable, connected to the latching lock body, is used to trigger the latching lock body to unlock from the latching lock latch. The bumper lock handle is located on the sheet metal part of the driver's cab and is connected to the bumper lock cable. It is used to operate the bumper lock cable to unlock the bumper lock body from the bumper lock latch.

8. The driver's cab door and window system as described in any one of claims 1-4, characterized in that, The driver's cab door and window system also includes a locking handle, which is rotatably connected to the door and window glass. The locking handle is provided with a guide groove to allow the locking handle to rotate between a locked position and an unlocked position.

9. The driver's cab door and window system as described in any one of claims 1-4, characterized in that, The driver's cab door and window system also includes a handrail, which is located on the side of the door and window glass away from the first door and window hinge assembly. One end of the handrail is connected to the first door and window hinge assembly, the middle part of the handrail is connected to the second door and window hinge assembly, and the other end of the handrail is fixed to the door and window glass by a handrail mounting plate, which is located on the side of the door and window glass away from the handrail.

10. The driver's cab door and window system as described in claim 9, characterized in that, A first elastic pad is provided between the first door and window hinge assembly and the door and window glass, and between the second door and window hinge assembly and the door and window glass; A second elastic pad is provided between one end of the handrail and the glass of the door or window, and between the middle part of the handrail and the glass of the door or window; A third elastic pad is provided between the handrail mounting plate and the door / window glass; The window glass is provided with several threaded holes, and both the first elastic pad and the second elastic pad are provided with protrusions that are embedded in the threaded holes.

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