CN112026804A - Cab framework structure, cab and rail vehicle - Google Patents

Abstract

The invention relates to the technical field of support frame installation structures, and provides a cab frame structure, a driver's cab and a rail vehicle, wherein the cab frame structure includes: a cab frame body and a front side replacement module, and the cab frame body is formed on the The installation gap, the front side replacement module is detachably connected to the installation gap position, and the front side replacement module includes two structures of an evacuation door frame module and a front window frame module. The evacuation door frame module and the front window have two structures. The skeleton module can be replaced and used, the evacuation door skeleton module can form the installation frame of the evacuation door on the front side of the cab skeleton body, and the front window skeleton module can form the lower side of the front window on the front side of the cab skeleton body support structure. The front side replacement module has two replaceable structures, an evacuation door skeleton module and a front window skeleton module, which respectively meet the needs of two cab structures with and without an evacuation door.

Description

Cab frame structure, cab and rail vehicle

technical field

The invention relates to the technical field of rail vehicle structures, in particular to a cab frame structure, a driver's cab and a rail vehicle.

Background technique

The driver's cab of the current rail vehicle has two forms, one of which is provided with an evacuation door structure on the front side of the driver's cab, and the other is only provided with a visual window without an evacuation door structure. The cab skeletons of the two cab structures cannot be used interchangeably. Under different usage requirements, only the two cab skeletons can be designed and produced separately. After the cab skeleton production is completed, the type cannot be changed, when the track production item is changed, it needs to be re-produced. It consumes a lot of man-hours and manpower, reduces production capacity, and is not conducive to large-scale batch line design and production.

SUMMARY OF THE INVENTION

The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the embodiment of the present invention proposes a cab skeleton structure to solve the defect that the type of cab skeleton cannot be changed in the prior art, realize the replaceable use of two cab skeletons, and reduce design and production costs.

The embodiment of the present invention also provides a driver's cab.

The embodiment of the present invention also provides a rail vehicle.

According to the cab frame structure of the embodiment of the first aspect of the present invention, a cab frame body and a front side replacement module are formed, an installation gap is formed on the cab frame body, and the front side replacement module is detachably connected at the position of the installation gap , the front side replacement module includes two structures: an evacuation door frame module and a front window frame module, the evacuation door frame module and the front window frame module can be replaced, and the evacuation door frame module can be used in the driver's cab The front side of the frame body forms the installation frame of the evacuation door, and the front window frame module can form the support structure of the lower side of the front window on the front side of the cab frame body.

According to an embodiment of the present invention, the evacuation door frame module includes two first connecting parts on both sides, the front window frame module includes two second connecting parts on both sides, the Both the first connection part and the second connection part are used for detachable connection with the cab frame body, the connection position of the first connection part and the cab frame body and the second connection part and the The connection positions of the main body of the cab frame are the same.

According to an embodiment of the present invention, the evacuation door frame further includes a first door frame constituent part and a second door frame constituent part, the first door frame constituent part and the second door frame constituent part are arranged in parallel and spaced apart, the first door frame constituent part The door frame constituent part is fixedly connected with the end of one of the first connecting parts, the second door frame constituent part is fixedly connected with the end of the other first connecting part, and the top end of the first door frame constituent part and The top ends of the second door frame constituent parts are all detachably connected to the cab frame body.

According to an embodiment of the present invention, both the first door frame constituent part and the second door frame constituent part include a first longitudinal support column and a second longitudinal support column, the first longitudinal support column and the second longitudinal support column The support columns are connected end to end.

According to an embodiment of the present invention, the cab frame body is provided with a first frame, a second frame and a third frame that are connected end to end in sequence, and the first frame and the third frame constitute two parts of the installation gap. A side frame, the second frame constitutes a top frame of the installation notch, and the first connection portion and the second connection portion connect the first frame and the third frame.

According to an embodiment of the present invention, the front window frame module further includes a lower support rod and a connecting rod, two ends of the connecting rod are respectively connected with one of the second connecting parts, and the second connecting parts are along the connecting rods. The axial extension of the rod, the lower support rod is fixed vertically with the connecting rod.

According to an embodiment of the present invention, a mounting seat is provided on the cab frame body and/or the front side replacement module, and a transition piece is provided on the mounting seat, and the transition piece is used to connect the cab cover or Body skeleton.

According to an embodiment of the present invention, the transition piece is a straight plate, an L-shaped plate or a Z-shaped plate structure fixed with the mounting seat.

A cab according to an embodiment of the second aspect of the present invention includes the cab frame structure and a cab cover described in any one of the above, the cab frame structure includes a cab frame body and a front side replacement module, the A mounting seat is provided on the cab frame body and/or the front side replacement module, and a transition piece is provided on the mounting seat, and the transition piece is connected with the cab cover.

A rail vehicle according to an embodiment of the third aspect of the present invention includes the cab frame structure described in any one of the embodiments of the first aspect of the present invention or the driver's cab described in the embodiment of the second aspect of the present invention.

The cab frame structure, the driver's cab and the rail vehicle provided by the embodiments of the present invention are provided with an installation gap on the main body of the driver's cab frame, and a detachable and replaceable front side replacement module is arranged at the position of the installation gap, and the front side replacement module has an evacuation door frame. The module and the front window skeleton module have two replaceable structures, which respectively meet the needs of two types of cab structures with evacuation doors and those without evacuation doors. When the skeleton structure of the cab needs to be replaced, the installed front side replacement module can be directly removed and replaced with another front side replacement module.

The first frame and the second frame on the cab frame body and the first door frame constituent part and the second door frame constituent part on the evacuation door frame can increase the supporting strength of the cab frame body and facilitate the transmission of the vertical load on the vehicle end. , to meet the needs of vehicle end loading and improve vehicle safety.

The main body of the cab frame and/or the front side replacement module is provided with a mounting seat, and the mounting seat is provided with a transition piece, and the transition piece is connected to the cab cover or the vehicle body frame, which can make up the installation gap and make the The cab frame structure can be adapted to different car body structures.

Additional aspects and advantages of the present invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or may be learned by practice of the invention.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

1 is a schematic structural diagram of a cab skeleton main body in a cab skeleton structure provided by an embodiment of the present invention;

2 is a schematic structural diagram of an evacuation door skeleton module in the cab skeleton structure provided by an embodiment of the present invention;

3 is a schematic diagram of the installation structure of the evacuation door frame module in the cab frame structure provided by the embodiment of the present invention;

4 is a schematic structural diagram of a front window frame module in the cab frame structure provided by an embodiment of the present invention;

5 is a schematic diagram of the installation structure of the front window frame module in the cab frame structure provided by the embodiment of the present invention;

6 is a schematic diagram of the arrangement of the mounting seat and the transition plate in the cab frame structure provided by an embodiment of the present invention;

7 is a schematic diagram of the arrangement of a mounting seat and a transition plate in a cab frame structure provided by another embodiment of the present invention;

FIG. 8 is a schematic diagram of the arrangement of the mounting seat and the transition plate in the cab frame structure provided by another embodiment of the present invention.

Reference number:

1. The main frame of the driver's cab; 11. The installation gap; 12. The first frame; 13. The second frame; 14. The third frame; 2. The evacuation door frame module; part; 221, the first longitudinal support column; 222, the second longitudinal support column; 23, the second door frame component; 3, the front window frame module; 31, the second connecting part; 32, the lower support rod; 33, the connecting rod ; 4, the mounting seat; 5a, the first transition piece; 5b, the second transition piece; 5c, the third transition piece; 6, the cab cover; 7, the body frame; 8, the chute; 9, the bolt.

Detailed ways

The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are intended to illustrate the present invention, but not to limit the scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "portrait", "horizontal", "top", "bottom", "front", "rear", "left", "right" , "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing this Inventive embodiments and simplified descriptions are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, Or integral connection; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present invention in specific situations.

In the embodiments of the present invention, unless otherwise expressly specified and limited, the first feature "above" or "under" the second feature may be in direct contact with the first and second features, or the first and second features pass through the middle indirect contact with the media. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structures, materials, or features are included in at least one example or example of embodiments of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

1 to 5 , an embodiment of the present invention provides a cab frame structure, including a cab frame body 1 and a front side replacement module, wherein the cab frame body 1 forms the support structure of the driver's cab, and the side walls of the driver's cab are opposite to each other. , The top is supported, and the cab frame is composed of metal rods welded to each other. An installation notch 11 is formed on one side of the cab frame body 1 . The installation notch 11 is an area surrounded by a metal rod on the cab frame body 1 , and no metal rod is provided in the installation notch 11 . The front side replacement module is detachably connected to the installation gap 11. The front side replacement module includes two structures: evacuation door frame module 2 and front window frame module 3. The evacuation door frame module 2 and front window frame module 3 can be replaced.

The two structures of the front side replacement module are respectively assembled and installed with the cab frame body 1 to form a cab frame structure suitable for different installation requirements. For example, when it is necessary to set an evacuation door on the driver's cab, install the evacuation door frame module 2 at the position of the installation gap 11, and the evacuation door frame module 2 can form the installation frame of the evacuation door on the front side of the main body 1 of the driver's cab frame. The evacuation door can be installed at the installation frame position, and the two sides of the evacuation door can be used to install the front window glass; when the evacuation door does not need to be installed on the cab, replace the evacuation door frame module 2 with the front window frame module 3. At this time, the front window The position above the frame module 3 is the installation position of the front window. When the frame module 3 of the front window is used, a larger front window can be installed on the front side of the driver's cab, and the vision is better.

Since the evacuation door frame module 2, the front window frame module 3 and the cab frame body 1 are detachably connected, the type can be easily changed after the installation is completed to meet the needs of changing the cab type in design and production, and improve production. efficiency and reduce production costs.

The evacuation door frame module 2 and the front window frame module 3 are both frame structures formed by welding and fixing metal rods, which have the advantages of small weight and convenient installation, and can meet the installation requirements of the cab cover 6 at the same time. The structure and installation form of the evacuation door frame module 2 and the front window frame module 3 will be described in detail below.

In one embodiment, the evacuation door frame module 2 includes two first connecting parts 21 on both sides, and the front window frame module 3 includes two second connecting parts 31 on both sides. 21 and the second connecting part 31 are both metal rods used for docking with the cab frame body 1, and the evacuation door can be completed by detachably connecting the first connecting part 21 or the second connecting part 31 with the cab frame body 1 Installation of frame module 2 or front window frame module 3. In a specific form, the positions on the first connecting portion 21 and the second connecting portion 31 for connecting with the cab frame body 1 are the ends of the first connecting portion 21 and the second connecting portion 31 . It is fixed by bolts 9 passing through the metal rods on the cab frame body 1. L-shaped connectors can also be provided on both sides of the docking position between the first connecting part 21 or the second connecting part 31 and the cab frame body 1, and then pass through Bolt 9 for connection. Of course, the ways of realizing the detachable connection between the first connecting part 21 and the second connecting part 31 and the cab frame body 1 are not limited to the above two, and other conventional forms that can be realized should also be within the protection scope of the embodiment of the present invention. Inside.

The connection position of the first connection portion 21 and the cab frame body 1 and the connection position of the second connection portion 31 to the cab frame body 1 are the same, so that only a fixed installation point needs to be provided on the cab frame body 1 , it is not necessary to adjust the position of the connector for installing the front replacement module when changing the type of the front replacement module.

The first connecting part 21 and the second connecting part 31 are preferably metal rods arranged horizontally, which can meet the force requirements of the cab frame body 1 in the lateral direction, and it is more convenient to install when using L-shaped connecting pieces for connection. .

In addition to the first connecting part 21, the evacuation door frame also includes a first door frame forming part 22 and a second door frame forming part 23, the first door frame forming part 22 and the second door frame forming part 23 are arranged in parallel and spaced apart, and the evacuation door can be installed on the first door frame forming part 22 and the second door frame forming part 23. Between the first door frame structure part 22 and the second door frame structure part 23 . The first door frame forming part 22 is fixedly connected to the end of one of the first connecting parts 21 , and the second door frame forming part 23 is fixedly connected to the end of the other first connecting part 21 , both of which can be fixed by welding.

The top ends of the first door frame constituent part 22 and the second door frame constituent part 23 are detachably connected to the cab frame body 1, and the fixing method can be the same as the installation method of the first connecting part 21, or different other installation methods can be adopted. As long as a detachable connection can be achieved.

After the evacuation door frame module 2 is installed, its upper end and the left and right sides are fixed by the cab frame body 1, and the lower end is connected with the driver's cab frame body 1 together with the floor structure of the driver's cab, so that the evacuation door frame module 2 can form an evacuation Stable, solid support structure for doors. At the same time, the first door frame structure part 22 and the second door frame structure part 23 on the evacuation door frame module 2 can also support the top of the cab frame body 1 in the vertical direction, increasing the vertical pressure bearing capacity of the cab.

The cab frame body 1 is provided with a first frame 12, a second frame 13 and a third frame 14 that are connected end to end in sequence. 13 forms the frame for the top of the mounting notch 11. It should be noted that, the first frame 12 , the second frame 13 and the third frame 14 do not necessarily have to use straight rods, and can also use bent rods or curved rods according to the shape and force requirements of the cab. Moreover, according to installation requirements, the first frame 12 , the second frame 13 and/or the third frame 14 may also adopt a multi-section splicing structure. The first frame 12 and the third frame 14 can play a supporting role in the vertical direction, and the second frame 13 can play a supporting role in the lateral direction, which increases the stability and firmness of the cab frame body 1 .

The first connecting portion 21 and the second connecting portion 31 are connected to the first frame 12 and the third frame 14 for fixing. The top ends of the first door frame structure part 22 and the second door frame structure part 23 of the evacuation door frame module 2 can be connected to the second frame 13 . The first frame 12, the second frame 13 and the third frame 14 realize the support for the evacuation door frame module 2 and the front window frame module 3, and the first frame 12, the second frame 13 and the third frame 14 can also form an evacuation Parts of the doors and front windows support the frame. When the evacuation door frame module 2 is used, the first frame 12 and the third frame 14 can form the left and right side frames of the front window located on both sides of the evacuation door, and the second frame 13 can form the frame at the top of the evacuation door and the frame on the two sides of the evacuation door. side of the top border of the front window. When the front window frame module 3 is used, the first frame 12 and the third frame 14 constitute the left and right side frames of the front window, and the second frame 13 constitutes the top frame of the front window.

In addition to the second connecting portion 31 , the front window frame module 3 also includes a lower support rod 32 and a connecting rod 33 . Two ends of the connecting rod 33 are respectively connected with a second connecting portion 31 , and the second connecting portion 31 is along the length of the connecting rod 33 . Axial extension. The connecting rod 33 and the second connecting portion 31 may adopt an integral molding structure, or may adopt a three-stage welding structure. The lower support rod 32 is perpendicular to the connecting rod 33 and is fixed below the connecting rod 33. The end of the lower support rod 32 facing away from the connecting rod 33 can be used for detachable connection with the floor of the driver's cab. The lower support rod 32 can vertically support the connecting rod 33 and the second connecting part 31 . Two or more lower connecting rods 33 may be arranged at intervals along the axial direction of the connecting rods 33 to increase the stability of the support. After the front window frame module 3 is installed, the connecting rod 33 and the second connecting portion 31 can form the lower side support frame of the front window of the driver's cab.

In each embodiment of the present invention, the lengths of the two first connecting portions 21 are not necessarily equal, and can be selected flexibly according to the layout of the evacuation door and the front windows located on both sides of the evacuation door. The lengths between the same two second connection parts 31 are not necessarily equal.

2, 3 and 5, in one embodiment of the present invention, a mounting seat 4 is provided on the cab frame body 1 and/or the front side replacement module, and the mounting seat 4 can be fixed on the cab frame body 1 and/or structures such as protrusions, square tubes, channel steel, angle steel or I-beam on the front replacement module are mainly used for fixing the cab cover 6 or connecting it with the vehicle body frame 7 . The mounting seat 4 is provided with a transition piece, which is an intermediate connecting piece between the mounting base 4 and the cab cover 6 or the vehicle body frame 7 , and the transition piece can eliminate the installation gap. When the cab cover 6 or the vehicle body frame 7 cannot be completely matched with the cab frame body 1 or the front replacement module, the transition piece can be connected. The transition piece can be fixed to the mounting seat 4 by welding, or can be fixed by bolts 9 .

The transition piece can be a straight plate, an L-shaped plate or a Z-shaped plate fixed to the mounting seat 4 , which is specifically determined according to the connection structure of the mounting seat 4 and the cab cover 6 or the vehicle body frame 7 . Several specific setting forms of the transition piece will be described in detail below with specific examples.

Referring to FIG. 6 , in one embodiment, the mounting seat 4 and the transition piece are used to connect the vehicle body frame 7 and the cab cover 6 at the same time. The mounting base 4 can adopt a square tube or channel steel structure, and the transition piece adopts two structures of L-shaped plate and straight plate. For the convenience of description, the transition piece of the straight plate structure is named the first transition piece 5a, and the transition piece of the L-shaped plate structure Named the second transition piece 5b.

The inner side of the cab cover 6 is provided with a chute 8 , and both ends of the chute 8 and the side facing the second transition piece 5 b are provided with openings, and the mounting seat 4 is provided with threaded holes on the side perpendicular to the cab cover 6 . One side of the second transition piece 5b is attached to the mounting seat 4 and fixed by the bolts 9 passing through the threaded holes, and the other side is fixedly connected to the chute 8 by the bolts 9 . The chute 8 limits the nut of the bolt 9 so that the bolt 9 cannot be disengaged in the axial direction, and the openings at both ends of the chute 8 can be used to slide the bolt 9 in. The sliding groove 8 can conveniently adjust the position of the bolt 9 to adapt to the installation position of the second transition piece 5b.

The first transition piece 5a is connected to the mounting seat 4 and the vehicle body frame 7. Specifically, two first transition pieces 5a can be provided, and one end of the first transition piece 5a is vertically fixed to the mounting seat 4 and the side wall is connected to the vehicle body frame. 7 is fitted and fixed, the end of the other first transition piece 5a is fixed vertically with the vehicle body frame 7 and the side wall is fitted and fixed with the side wall of the mounting seat 4 .

In this embodiment, the first transition piece 5a and the second transition piece 5b are used together to realize the connection between the cab frame body 1 or the front side replacement module, the vehicle body frame 7 and the cab cover 6, and the installation is convenient and firm. it is good.

Referring to FIG. 7 , in one embodiment, the cab frame main body 1 and the vehicle body frame 7 are connected only through the first transition piece 5a. The mounting seat 4 adopts a channel steel or square tube structure. The two side walls of the mounting seat 4 are welded and fixed to the cab frame body 1, the side wall of the first transition piece 5a is welded and fixed to the mounting seat 4, and the end of the first transition piece 5a is welded and fixed. It is welded and fixed with the vehicle body frame 7 . This connection method has a simple structure, and the installation can be completed through the installation seat 4 and the first transition piece 5a when there is a gap between the cab frame main body 1 and the vehicle body frame 7, thereby increasing the applicability of the installation structure.

Referring to FIG. 8 , in another embodiment, the mounting seat 4 and the vehicle body frame 7 are connected by a transition piece of a Z-shaped plate structure. At this time, the mounting seat 4 may adopt an angle steel, channel steel or square tube structure. For the convenience of description, the transition piece of the Z-shaped plate structure is named as the third transition piece 5c. In this embodiment, the third transition piece 5c is located between the mounting seat 4 and the vehicle body frame 7, and two inner sides of a right angle of the third transition piece 5c are welded and fixed to the two adjacent side surfaces of the mounting seat 4 respectively. The other right-angled two inner sides of the three transition pieces 5c are welded and fixed to the two adjacent sides of the vehicle body frame 7 respectively. The dislocation error between the mounting seat 4 and the vehicle body frame 7 can be eliminated by the third transition piece 5c, the installation is firm, and it is not easy to shift.

In the above-mentioned several installation forms of the mounting seat 4 and the transition plate, the connection between the cab frame main body 1 and the front side replacement module and the cab cover 6 or the vehicle body frame 7 can be realized. However, it should be noted that the installation forms of the mounting seat 4 and the transition plate are not limited to the above, and other structures and installation forms that can realize transition connection should also be within the protection scope of the embodiments of the present invention.

In one embodiment of the present invention, a cab is provided, the cab includes a cab frame structure and a cab cover 6, the cab frame structure includes a cab frame body 1 and a front side replacement module, and the cab frame body 1 And/or an installation seat 4 is arranged on the front side replacement module, and a transition piece is arranged on the installation seat 4 , and the transition piece is connected with the cab cover 6 .

Before installing the cab cover 6 in such a cab, the front side replacement module can be selected and replaced according to the design and production needs to adapt to different production projects, and the setting of the mounting seat 4 and the transition piece can also make the cab cover 6 and the cab cover 6. The connection between the cab skeleton structures is more convenient and the applicability is better.

In another embodiment of the present invention, a rail vehicle is provided, and the rail vehicle includes the cab frame structure or cab in the above embodiments. Can choose whether to install evacuation doors according to production needs. It has the advantages of convenient replacement of types, reduced design and production costs, and improved production efficiency.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be The technical solutions described in the foregoing embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A cab skeleton structure, characterized in that it comprises: a cab skeleton main body and a front side replacement module, an installation gap is formed on the cab skeleton main body, and the front side replacement module is detachably connected to the installation gap Position, the front side replacement module includes two structures: an evacuation door frame module and a front window frame module, the evacuation door frame module and the front window frame module can be replaced, and the evacuation door frame module can be used in the driver. The front side of the cab frame body forms an installation frame of the evacuation door, and the front window frame module can form a support structure for the lower side of the front window on the front side of the cab frame body. 2 . The cab frame structure according to claim 1 , wherein the evacuation door frame module comprises two first connecting parts arranged on both sides, and the front window frame module comprises two first connection parts arranged on both sides. 3 . The two second connecting parts are used for detachable connection with the main body of the cab frame, and the first connecting part is connected with the main body of the cab frame The position and the connection position of the second connecting portion and the cab frame body are the same. 3 . The cab frame structure according to claim 2 , wherein the evacuation door frame further comprises a first door frame constituting part and a second door frame constituting part, the first door frame constituting part and the second door frame The constituent parts are arranged in parallel and spaced apart, the first door frame constituent part is fixedly connected with the end of one of the first connecting parts, the second door frame constituent part is fixedly connected with the end of the other first connecting part, The top end of the first door frame constituting part and the top end of the second door frame constituting part are both detachably connected to the cab frame body. 4 . The cab frame structure according to claim 3 , wherein the first door frame constituent part and the second door frame constituent part each comprise a first longitudinal support column and a second longitudinal support column, and the first A longitudinal support column is connected end to end with the second longitudinal support column. 5. The frame structure of the driver's cab according to claim 2, wherein the frame body of the driver's cab is provided with a first frame, a second frame and a third frame that are connected end to end in sequence, and the first frame and the The third frame forms the two side frames of the installation notch, the second frame forms the top frame of the installation notch, and the first connecting portion and the second connecting portion connect the first frame and the first frame. Three borders. 6 . The cab frame structure according to claim 2 , wherein the front window frame module further comprises a lower support rod and a connecting rod, two ends of the connecting rod are respectively connected with one of the second connecting parts, 6 . The second connecting portion extends along the axial direction of the connecting rod, and the lower support rod is vertically fixed to the connecting rod. 7. The cab frame structure according to claim 6, wherein a mounting seat is provided on the cab frame body and/or the front side replacement module, and a transition piece is provided on the mounting seat, so that the The transition piece is used to connect the cab cover or the vehicle body frame. 8 . The cab frame structure according to claim 7 , wherein the transition piece is a straight plate, an L-shaped plate or a Z-shaped plate structure fixed to the mounting seat. 9 . 9. A driver's cab, characterized in that it comprises a driver's cab frame structure and a driver's cab cover as claimed in any one of claims 1-8, wherein the driver's cab frame structure comprises a driver's cab frame body and a front side replacement module, A mounting seat is provided on the cab frame body and/or the front side replacement module, and a transition piece is provided on the mounting seat, and the transition piece is connected with the cab cover. 10. A rail vehicle, characterized by comprising the cab frame structure according to any one of claims 1-8 or the cab according to claim 9.

Images