Driver's cab skeleton structure

Abstract

The driver's cab skeleton structure disclosed in the present invention comprises a front ring beam, a rear ring beam, a connecting side beam and a reinforcement assembly. The front ring beam comprises a first cross beam and a first longitudinal beam respectively connected to the two ends of the first cross beam, and the first cross beam is located at the top of the first longitudinal beam. The rear ring beam is arranged in parallel with the front ring beam, and comprises a second cross beam and a second longitudinal beam respectively connected to the two ends of the second cross beam, and the second cross beam is located at the top of the second longitudinal beam. One end of the connecting side beam is connected to the front ring beam, and the other end is connected to the rear ring beam. The front ring beam, the rear ring beam and the connecting side beam are all carbon steel bending parts processed by bending technology. At least one of the front ring beam, the rear ring beam, the connecting side beam and the connection between any two is provided with a reinforcement assembly to reduce the stress concentration at these positions and improve the structural strength of the driver's cab skeleton structure. The driver's cab skeleton structure provided by the present invention increases the contact area with the vehicle body, and by adding a reinforcement assembly, the structural strength and bearing capacity of the driver's cab skeleton structure are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of rail vehicles, and more particularly to a driver's cab skeleton structure. Background Art

[0002] The driver's cab is an important part of a transport vehicle to ensure the driver's safe operation. The cab frame is an important component used to build the cab. The cab frame needs to meet the structural load-bearing requirements, the layout requirements of the entire vehicle, and the driver's cab vision requirements. The existing cab frame is usually welded from carbon steel pipes, with a relatively simple structure and a heavier weight at the same strength.

[0003] Therefore, how to reduce the weight while ensuring the structural strength of the driver's cab frame has become a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a driver's cab frame structure so as to reduce the weight while ensuring the structural strength of the driver's cab frame.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A driver's cab skeleton structure, comprising:

[0007] A front ring beam, comprising a first cross beam and first longitudinal beams respectively connected to both ends of the first cross beam, wherein the first cross beam is located on the top of the first longitudinal beam;

[0008] a rear ring beam, arranged parallel to the front ring beam, comprising a second cross beam and second longitudinal beams respectively connected to both ends of the second cross beam, wherein the second cross beam is located on the top of the second longitudinal beam;

[0009] A connecting side beam, one end of which is connected to the front ring beam, and the other end of which is connected to the rear ring beam, wherein the front ring beam, the rear ring beam and the connecting side beam are all prepared by a bending process;

[0010] A reinforcement component is provided on at least one of the front ring beam, the rear ring beam, the connecting side beam, and the connection between any two of them.

[0011] Preferably, in the above-mentioned driver's cab skeleton structure, a front end cross beam is further connected between the two first longitudinal beams, and the front end cross beam is located at the lower side of the first cross beam and protrudes from the front ring beam to the side away from the rear ring beam.

[0012] Preferably, in the above-mentioned driver's cab skeleton structure, a front end column is provided at the lower side of the front end cross beam, and the bottom of the front end column is located on the same plane as the bottoms of the first longitudinal beam and the second longitudinal beam.

[0013] Preferably, in the above-mentioned driver's cab skeleton structure, the plate thickness of the front ring beam, the front end column and the front end cross beam is greater than the plate thickness of the rear ring beam;

[0014] The cross-sectional areas of the front ring beam, the front end column and the front end cross beam are all greater than the cross-sectional area of ​​the rear ring beam.

[0015] Preferably, in the above-mentioned driver's cab skeleton structure, the bottom of the front end column has a support seat, and the support seat is used to be connected to the vehicle body floor by means of in-hole corner welding and outer circle full welding.

[0016] Preferably, in the above-mentioned driver's cab skeleton structure, the front end column, the front end cross beam, the first longitudinal beam and the second longitudinal beam are all U-shaped channel steel beams formed by bending;

[0017] The reinforcement assembly comprises a reinforcement plate arranged at the opening of the U-shaped channel steel beam, and a load-releasing hole is formed on the reinforcement plate.

[0018] Preferably, in the above-mentioned driver's cab skeleton structure, the reinforcement assembly includes a front crossbeam reinforcement member arranged on the upper surface of the front end crossbeam, one end of the front crossbeam reinforcement member is connected to one of the first longitudinal beams, and the other end is connected to the other first longitudinal beam.

[0019] Preferably, in the above-mentioned driver's cab skeleton structure, a hanging front beam is provided between the ends of the two first longitudinal beams close to the first cross beam, and the hanging front beam is located on a side of the first cross beam close to the front end cross beam.

[0020] Preferably, in the above-mentioned cab skeleton structure, the connecting side beam comprises:

[0021] a top longitudinal beam connected between the first transverse beam and the second transverse beam;

[0022] A side cross beam is connected between the first longitudinal beam and the second longitudinal beam, and the reinforcement component includes a first reinforcing rib connected to the side cross beam and the first longitudinal beam, and a second reinforcing rib connected to the side cross beam and the second longitudinal beam.

[0023] Preferably, in the above-mentioned driver's cab skeleton structure, the side cross beam is a U-shaped channel steel beam formed by bending, and the reinforcement assembly also includes a side beam reinforcement piece arranged at the opening of the side cross beam, and the side beam reinforcement piece is provided with a unloading hole.

[0024] Preferably, in the above-mentioned driver's cab skeleton structure, the first cross beam and the first longitudinal beam are connected by a first transition piece;

[0025] The second cross beam and the second longitudinal beam are connected via a second transition piece.

[0026] Preferably, in the above-mentioned driver's cab skeleton structure, the first transition piece and the second transition piece are both welded parts.

[0027] Preferably, in the above-mentioned driver's cab skeleton structure, the connecting side beam includes a hanging side beam connected between the first transition piece and the second transition piece, and the reinforcement assembly includes a third reinforcing rib connected to the hanging side beam and the first transition piece, and a fourth reinforcing rib connected to the hanging side beam and the second transition piece.

[0028] Preferably, in the above-mentioned cab skeleton structure, the hanging side beam comprises two supporting beams arranged in parallel, and the reinforcement assembly further comprises a first hanging reinforcement plate and a second hanging reinforcement plate arranged between the two supporting beams;

[0029] The first suspension reinforcement plate is closer to the front ring beam than the second suspension reinforcement plate;

[0030] The first suspension reinforcement plate is provided with a load-relief hole;

[0031] The second hanging reinforcement plates are arranged in sequence in a plurality and include a second hanging reinforcement plate body located in a plane between the two support beams and a second hanging reinforcement rib body perpendicular to the second hanging reinforcement plate body.

[0032] Preferably, in the above-mentioned driver's cab skeleton structure, the rear ring beam is used for surface contact with the vehicle body side walls and the vehicle roof, and is connected to the vehicle body side walls and the vehicle roof by cross-section welding.

[0033] The driver's cab skeleton structure provided by the present invention comprises a front ring beam, a rear ring beam, a connecting side beam and a reinforcement assembly. The front ring beam comprises a first cross beam and a first longitudinal beam respectively connected to the two ends of the first cross beam, and the first cross beam is located at the top of the first longitudinal beam. The rear ring beam is arranged in parallel with the front ring beam, and comprises a second cross beam and a second longitudinal beam respectively connected to the two ends of the second cross beam, and the second cross beam is located at the top of the second longitudinal beam. One end of the connecting side beam is connected to the front ring beam, and the other end is connected to the rear ring beam, so that the front ring beam, the rear ring beam and the connecting side beam work together to form a driver's cab space. The front ring beam, the rear ring beam and the connecting side beam are all carbon steel bent parts processed by a bending process, and the cross-sectional shape and thickness of the bent parts can be designed according to the size of the required load. At least one of the front ring beam, the rear ring beam, the connecting side beam and the connection between any two is provided with a reinforcement assembly to reduce the stress concentration at these positions and improve the structural strength of the driver's cab skeleton structure.

[0034] Compared with the prior art that uses carbon steel pipes to prepare the driver's cab frame, the driver's cab frame structure provided by the present invention is prepared by carbon steel bent parts processed by a bending process. Carbon steel plate bent parts with different cross-sections and different plate thicknesses can be designed according to the load-bearing size. While ensuring the rigidity and strength, the weight and material cost of the driver's cab frame are reduced, and the structural strength and load-bearing capacity of the driver's cab frame structure are improved by adding reinforcement components at locations where stress concentration exists. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is an axonometric view of the driver's cab skeleton structure disclosed in an embodiment of the present invention at a first angle;

[0037] Figure 2 The isometric view of the driver's cab skeleton structure disclosed in the embodiment of the present invention at a second angle;

[0038] Figure 3 A rear view of the driver's cab skeleton structure disclosed in an embodiment of the present invention;

[0039] Figure 4 for Figure 3 The cross-sectional view at AA in FIG.

[0040] Figure 5 A schematic diagram of a partial structure of a driver's cab skeleton structure disclosed in an embodiment of the present invention;

[0041] Figure 6 It is a schematic diagram of the structure of the transition piece disclosed in the embodiment of the present invention;

[0042] Figure 7 It is a structural schematic diagram of a suspension beam reinforcement member disclosed in an embodiment of the present invention;

[0043] Figure 8 A schematic diagram of the structure of a front cross beam reinforcement member disclosed in an embodiment of the present invention;

[0044] Fig. 9 A schematic structural diagram of a first reinforcing rib disclosed in an embodiment of the present invention;

[0045] Fig.10 A schematic structural diagram of a second reinforcing rib disclosed in an embodiment of the present invention;

[0046] Fig.11A schematic diagram of the structure of a beam structure reinforcement plate disclosed in an embodiment of the present invention;

[0047] Fig.12 A schematic diagram of the structure of a first crossbeam reinforcement plate disclosed in an embodiment of the present invention;

[0048] Fig.13 It is a structural schematic diagram of a first hanging reinforcement plate disclosed in an embodiment of the present invention;

[0049] Fig.14 It is a schematic structural diagram of a second hanging reinforcement plate disclosed in an embodiment of the present invention;

[0050] Fig.15 It is a schematic structural diagram of a longitudinal beam reinforcement member disclosed in an embodiment of the present invention;

[0051] Fig.16 It is a schematic structural diagram of a side beam reinforcement member disclosed in an embodiment of the present invention;

[0052] Fig.17 It is a schematic diagram of the structure of the second crossbeam reinforcement plate disclosed in an embodiment of the present invention.

[0053] Among them, 110 is a front ring beam, 111 is a first cross beam, 112 is a first longitudinal beam, 113 is a first transition piece, 120 is a rear ring beam, 121 is a second cross beam, 122 is a second longitudinal beam, 123 is a second transition piece, 130 is a front cross beam, 131 is a front column, 132 is a hanging front beam, 133 is a support seat, 140 is a connecting side beam, 141 is a side cross beam, 142 is a hanging side beam, 143 is a top longitudinal beam, 150 is a suspension beam reinforcement, 151 is a front cross beam reinforcement, 152 is a first reinforcement rib, 153 is a second reinforcement rib, 154 is a third reinforcement rib, 155 is a fourth reinforcement rib, 156 is a cross beam end reinforcement plate, 157 is a first cross beam reinforcement plate, 158 is a first suspension reinforcement plate, 159 is a second suspension reinforcement plate, 160 is a longitudinal beam reinforcement, 161 is a side beam reinforcement, and 162 is a second cross beam reinforcement plate. DETAILED DESCRIPTION

[0054] The core of the present invention is to disclose a driver's cab frame structure so as to reduce the weight while ensuring the structural strength of the driver's cab frame.

[0055] The following is an explanation of the embodiments with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the invention described in the claims. In addition, the entire contents of the configurations shown in the following embodiments are not limited to the solutions required as the invention described in the claims.

[0056] like Figure 1 and Figure 2As shown, the cab skeleton structure disclosed in the embodiment of the present invention includes a front ring beam 110, a rear ring beam 120, a connecting side beam 140 and a reinforcement assembly. The front ring beam 110 includes a first cross beam 111 and a connecting side beam 140.

[0057] The first longitudinal beam 112 is connected to both ends of the first cross beam 111, and the first cross beam 111 is located at the top of the first longitudinal beam 112, and the front ring beam 110 forms a U-shaped structure with an opening downward. The rear ring beam 120 is arranged in parallel with the front ring beam 110, and includes a second cross beam 121 and second longitudinal beams 122 respectively connected to both ends of the second cross beam 121, and the second cross beam 121 is located at the top of the second longitudinal beam 122, and the rear ring beam 120 also forms a U-shaped structure with an opening downward. One end of the connecting side beam 140 is connected to the front ring beam 110, and the other end is connected to the rear ring beam 120, so that the front ring beam 110, the rear ring beam 120 and the connecting side beam 140 work together to form a driver's room space.

[0058] The front ring beam 110, the rear ring beam 120 and the connecting side beam 140 are all carbon steel bent parts processed by bending technology, and the cross section and thickness of the bent parts can be designed according to the load-bearing size. At least one of the front ring beam 110, the rear ring beam 120, the connecting side beam 140 and the connection between any two is provided with a reinforcement component to reduce the stress concentration at these positions and improve the structural strength of the driver's cab skeleton structure.

[0059] Compared with the prior art that uses carbon steel pipes to prepare the driver's cab frame, the driver's cab frame structure disclosed in the embodiment of the present invention is prepared by using carbon steel bent parts processed by a bending process. Carbon steel plate bent parts with different cross-sections and different plate thicknesses can be designed according to the load-bearing size. While ensuring the rigidity and strength, the weight and material cost of the driver's cab frame are reduced, and the structural strength and load-bearing capacity of the driver's cab frame structure are improved by adding reinforcement components at locations where stress concentration exists.

[0060] Combination Figure 3 and Figure 4 In a specific embodiment disclosed in the present invention, a front column 131 is provided on the lower side of the front cross beam 130, and the front column 131 can support the front cross beam 130 and provide more stress points for the driver's cab skeleton structure. The bottom of the front column 131 and the bottom of the first longitudinal beam 112 and the second longitudinal beam 122 are located on the same plane, so that the placement of the driver's cab skeleton structure is more stable.

[0061] Furthermore, since the front ring beam 110, the front column 131 and the front cross beam 130 bear a greater force than the rear ring beam 120, the plate thickness of the front ring beam 110, the front column 131 and the front cross beam 130 is greater than the plate thickness of the rear ring beam 120, and the cross-sectional area of ​​the front ring beam 110, the front column 131 and the front cross beam 130 is greater than the cross-sectional area of ​​the rear ring beam 120. Bending carbon steel plates of different plate thicknesses into structures with appropriate cross-sections according to structural and strength requirements can reduce the weight and material cost of the cab skeleton structure while ensuring structural strength.

[0062] like Figure 5 As shown, the bottom of the front column 131 has a support seat 133, which can increase the contact area with the vehicle body and improve the reliability of the connection. The support seat 133 can be made of a flat thick steel plate to enhance the structural rigidity, and the support seat 133 can be provided with a through hole for welding with the vehicle body, so that the support seat 133 and the vehicle body floor can be connected through the hole.

[0063] The connection is made by corner welding and full outer circle welding to ensure the stability of the vehicle and reduce the deformation of the front floor of the vehicle body during the manufacturing and operation stages.

[0064] In a specific embodiment disclosed in the present invention, the front column 131, the front cross beam 130, the first longitudinal beam 112 and the second longitudinal beam 122 are all U-shaped channel steel beams formed by bending, and due to the heavy load, the front column 131, the front cross beam 130 and the first longitudinal beam 112 can be made of thicker carbon steel plates bent into a "U"-shaped structure with a larger cross section; the rear ring beam 120 bears a relatively small load, and the second longitudinal beam 122 can be made of a relatively thin carbon steel plate bent into a "U"-shaped structure with a smaller cross section. The remaining components can be bent from thinner carbon steel plates into angle steel or a "Z"-shaped structure according to structural requirements.

[0065] The reinforcement assembly includes a reinforcement plate arranged at the opening of the U-shaped channel steel beam, and a load-releasing hole is opened on the reinforcement plate. Figure 2 and Fig.15 The second longitudinal beam 122 is provided with a longitudinal beam reinforcement 160 for improving the structural strength of the second longitudinal beam 122. A relief hole is provided in the middle of the longitudinal beam reinforcement 160, and relief grooves are provided at both ends to reduce stress concentration.

[0066] In order to improve the main bearing structure of the cab frame, a front cross beam 130 is further connected between the two first longitudinal beams 112. The front cross beam 130 is located at the lower side of the first cross beam 111 and protrudes from the front ring beam 110 to the side away from the rear ring beam 120. The front cross beam 130 and the front ring beam 110 are arranged to form a front view window of the cab and further enhance the structural strength of the cab frame structure.

[0067] In a specific embodiment disclosed in the present invention, Figure 2 and Figure 8 The upper surface of the front cross beam 130 is provided with a front cross beam reinforcement 151 for increasing the front cross beam 130 , one end of the front cross beam reinforcement 151 is connected to one of the first longitudinal beams 112 , and the other end is connected to the other first longitudinal beam 112 . Figure 2 , Fig.12 and Fig.17 The front end cross beam 130 is provided with a first cross beam reinforcement plate 157 and a second cross beam reinforcement plate 162 near the opening of the first longitudinal beam 112, in order to increase the structural strength of the end of the front end cross beam 130, combined with Figure 2 and Fig.11 The front cross beam 130 is provided with a cross beam end reinforcement plate 156 at the end opening facing the interior of the driver's cab. The front cross beam reinforcement member 151, the first cross beam reinforcement plate 157 and the cross beam end reinforcement plate 156 can all be designed in shape according to their setting positions, and all are provided with unloading holes.

[0068] In order to provide more reliable support for the components between the first longitudinal beam 112 and the front cross beam 130 when adding subsequent structures to the cab skeleton structure, a hanging front beam 132 is provided between the ends of the two first longitudinal beams 112 close to the first cross beam 111, and the hanging front beam 132 is located on the side of the first cross beam 111 close to the front cross beam 130. The hanging front beam 132 can increase the contact area with the components arranged in the front visual window. Furthermore, a hanging beam reinforcement 150 can be provided between the hanging front beam 132 and the first cross beam 111 to enhance the connection strength.

[0069] In order to realize the connection between the front ring beam 110 and the rear ring beam 120, the connecting side beam 140 includes a top longitudinal beam 143 and a side cross beam 141. The top longitudinal beam 143 is connected between the first cross beam 111 and the second cross beam 121, and the side cross beam 141 is connected between the first longitudinal beam 112 and the second longitudinal beam 122. In order to increase the connection strength between the front ring beam 110 and the rear ring beam 120 and the connecting side beam 140, the reinforcement assembly includes a first reinforcing rib plate 152 connected to the side cross beam 141 and the first longitudinal beam 112, and a second reinforcing rib plate 153 connected to the side cross beam 141 and the second longitudinal beam 122.

[0070] like Fig. 9 As shown, the first reinforcing rib 152 can be a rib having a certain thickness formed by bending a carbon steel plate. Fig.10 The second reinforcing rib 153 can be a single-layer carbon steel rib, and a corner used to connect with the side cross beam 141 and the second longitudinal beam 122 is a notch for unloading. Appropriate arrangement of unloading holes can reduce the stress concentration and self-weight of the driver's cab frame.

[0071] Combination Figure 1 and Fig.16In order to improve the connection strength of the side cross beam 141, the reinforcement assembly includes a side beam reinforcement piece 161 arranged on the side cross beam 141. The side cross beam 141 is a U-shaped channel steel beam formed by bending. The reinforcement assembly also includes a side beam reinforcement piece 161 arranged at the opening of the side cross beam 141. The side beam reinforcement piece 161 is provided with a unloading hole to reduce the stress concentration environment of the component.

[0072] Since there is a large angle between the first cross beam 111 and the first longitudinal beam 112, in order to achieve a better transition between the two, the first cross beam 111 and the first longitudinal beam 112 are connected by a first transition piece 113. Similarly, in order to achieve a better transition between the second cross beam 121 and the second longitudinal beam 122, the second cross beam 121 and the second longitudinal beam 122 are connected by a second transition piece 123. Figure 6 The structures of the first transition piece 113 and the second transition piece 123 are relatively complex and can be welded parts made by welding process to reduce the processing difficulty and cost.

[0073] In a specific embodiment disclosed in the present invention, the connecting side beam 140 includes a hanging side beam 142 connected between the first transition piece 113 and the second transition piece 123. The reliability of the connection between the front ring beam 110 and the rear ring beam 120 is improved by providing the hanging side beam 142. In order to further enhance the connection strength between the hanging side beam 142 and the first transition piece 113 and the second transition piece 123, the reinforcement assembly includes a third reinforcing rib 154 connected to the hanging side beam 142 and the first transition piece 113, and a fourth reinforcing rib 155 connected to the hanging side beam 142 and the second transition piece 123.

[0074] Combination Figure 1 , Fig.13 and Fig.14 The hanging side beam 142 includes two support beams arranged in parallel, and the reinforcement assembly also includes a first hanging reinforcement plate 158 and a second hanging reinforcement plate 159 arranged between the two support beams. The first hanging reinforcement plate 158 is closer to the front ring beam 110 than the second hanging reinforcement plate 159, and a load relief hole is provided on the first hanging reinforcement plate 158. The second hanging reinforcement plate 159 can be arranged in sequence in a plurality, and includes a second hanging reinforcement plate body located in a plane between the two support beams and a second hanging reinforcement rib body perpendicular to the second hanging reinforcement plate body.

[0075] The rear ring beam 120 is used for surface-to-surface contact with the side walls and the roof of the vehicle body, and is connected to the side walls and the roof of the vehicle body by cross-section welding. The surface-to-surface contact has a large contact area, which avoids excessive stress concentration. The driver's cab skeleton structure can be fixed to the side walls and the roof of the vehicle body by internal and external cross-section welding, which can effectively ensure the accuracy of the vehicle body after synthesis and enhance the strength and stability of the whole vehicle.

[0076] The driver's cab skeleton structure disclosed in the embodiment of the present invention is welded with carbon steel bent parts, and the strength of the driver's cab skeleton is enhanced by designing bent parts with different cross-sectional areas and a large number of reinforcement parts. The structure is reasonable, the material selection is appropriate, the force transmission is relatively uniform, and the strength simulation cloud map of the driver's cab skeleton when subjected to longitudinal compression shows that the driver's cab skeleton structure does not have large stress concentration at the connection points with the roof, side walls of the vehicle body and the chassis, as well as at its own reinforcement parts, and passes the requirements of EN 12663 in simulation calculations and static strength tests.

[0077] Since the terms "first" and "second" in the specification and claims of the present invention and the above drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but may include steps or units that are not listed.

[0078] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A driver's cab skeleton structure, characterized in that: include: The front ring beam (110) comprises a first cross beam (111) and a first longitudinal beam (112) respectively connected to both ends of the first cross beam (111), wherein the first cross beam (111) is located at the top of the first longitudinal beam (112); a rear ring beam (120), arranged in parallel with the front ring beam (110), comprising a second cross beam (121) and second longitudinal beams (122) respectively connected to both ends of the second cross beam (121), wherein the second cross beam (121) is located on top of the second longitudinal beam (122); A connecting side beam (140), one end of which is connected to the front ring beam (110) and the other end of which is connected to the rear ring beam (120), wherein the front ring beam (110), the rear ring beam (120) and the connecting side beam (140) are all prepared by a bending process; A reinforcing component, wherein at least one of the front ring beam (110), the rear ring beam (120), the connecting side beam (140), and a connection point between any two of the front ring beam (110), is provided with the reinforcing component; A front cross beam (130) is also connected between the two first longitudinal beams (112), and the front cross beam (130) is located at the lower side of the first cross beam (111) and protrudes from the front ring beam (110) toward a side away from the rear ring beam (120); A front end column (131) is disposed on the lower side of the front end cross beam (130), and the bottom of the front end column (131) is located on the same plane as the bottoms of the first longitudinal beam (112) and the second longitudinal beam (122); The bottom of the front end column (131) is provided with a support seat (133), and the support seat (133) is used to be connected to the vehicle body floor by means of inner hole fillet welding and outer circle full welding; The reinforcement assembly comprises a front crossbeam reinforcement piece (151) arranged on the upper surface of the front crossbeam (130), one end of the front crossbeam reinforcement piece (151) is connected to one of the first longitudinal beams (112), and the other end is connected to the other first longitudinal beam (112); a first crossbeam reinforcement plate (157) and a second crossbeam reinforcement plate (162) are arranged at the opening of the front crossbeam (130) close to the first longitudinal beam (112), and a crossbeam end reinforcement plate (156) is arranged at the end opening of the front crossbeam (130) facing the interior of the driver's cab; the front crossbeam reinforcement piece (151), the first crossbeam reinforcement plate (157) and the crossbeam end reinforcement plate (156) are all provided with unloading holes.

2. The driver's cab skeleton structure according to claim 1, characterized in that: The plate thicknesses of the front ring beam (110), the front end column (131) and the front end cross beam (130) are all greater than the plate thickness of the rear ring beam (120); The cross-sectional areas of the front ring beam (110), the front end column (131) and the front end cross beam (130) are all greater than the cross-sectional area of ​​the rear ring beam (120).

3. The driver's cab skeleton structure according to claim 1, characterized in that: The front end column (131), the front end cross beam (130), the first longitudinal beam (112) and the second longitudinal beam (122) are all U-shaped channel steel beams formed by bending; The reinforcement assembly comprises a reinforcement plate arranged at the opening of the U-shaped channel steel beam, and a load-releasing hole is formed on the reinforcement plate.

4. The driver's cab skeleton structure according to claim 1, characterized in that: A hanging front beam (132) is provided between one end of the two first longitudinal beams (112) close to the first cross beam (111), and the hanging front beam (132) is located on one side of the first cross beam (111) close to the front end cross beam (130).

5. The driver's cab skeleton structure according to claim 1, characterized in that: The connecting side beam (140) comprises: A top longitudinal beam (143), wherein the top longitudinal beam (143) is connected between the first transverse beam (111) and the second transverse beam (121); A side cross beam (141) is connected between the first longitudinal beam (112) and the second longitudinal beam (122), and the reinforcement component includes a first reinforcing rib (152) connected to the side cross beam (141) and the first longitudinal beam (112), and a second reinforcing rib (153) connected to the side cross beam (141) and the second longitudinal beam (122).

6. The driver's cab skeleton structure according to claim 5, characterized in that: The side cross beam (141) is a U-shaped channel steel beam formed by bending, and the reinforcement assembly further comprises a side beam reinforcement piece (161) arranged at the opening of the side cross beam (141), and a load relief hole is provided on the side beam reinforcement piece (161).

7. The driver's cab skeleton structure according to claim 1, characterized in that: The first cross beam (111) and the first longitudinal beam (112) are connected via a first transition piece (113); The second cross beam (121) and the second longitudinal beam (122) are connected via a second transition piece (123).

8. The driver's cab skeleton structure according to claim 7, characterized in that: The first transition piece (113) and the second transition piece (123) are both tailor-welded parts.

9. The driver's cab skeleton structure according to claim 7, characterized in that: The connecting side beam (140) includes a hanging side beam (142) connected between the first transition piece (113) and the second transition piece (123), and the reinforcement component includes a third reinforcing rib (154) connected to the hanging side beam (142) and the first transition piece (113), and a fourth reinforcing rib (155) connected to the hanging side beam (142) and the second transition piece (123).

10. The driver's cab skeleton structure according to claim 9, characterized in that: The hanging side beam (142) includes two support beams arranged in parallel, and the reinforcement assembly also includes a first hanging reinforcement plate (158) and a second hanging reinforcement plate (159) arranged between the two support beams; The first hanging reinforcement plate (158) is closer to the front ring beam (110) than the second hanging reinforcement plate (159); The first hanging reinforcement plate (158) is provided with a load-releasing hole; The second hanging reinforcement plates (159) are multiple and arranged in sequence, and include a second hanging reinforcement plate body located in a plane between the two support beams and a second hanging reinforcement rib body perpendicular to the second hanging reinforcement plate body.

11. The driver's cab skeleton structure according to any one of claims 1 to 10, characterized in that: The rear ring beam (120) is used for surface contact with the vehicle body side wall and the vehicle roof, and is connected to the vehicle body side wall and the vehicle roof by cross-section welding.

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