A modular crane operator's cab frame structure

Abstract

This invention belongs to the field of vehicle frame technology and relates to a modular crane operator's cab frame structure, including a vehicle frame, doors, windshields, and exterior skin. The vehicle frame includes a left side panel, a right side panel, and multiple crossbeams welded between the left and right side panels. The doors are located on the left side panel, and the windshields and exterior skin are fixed to the left and right side panels. Both the left and right side panels include shaped tubes and bottom longitudinal beams. The shaped tubes have a fan-shaped cross-section, and the shaped tubes and bottom longitudinal beams form a closed ring beam structure. The shaped tubes include an arc-shaped section at the front of the vehicle frame and a right-angle section at the rear. The windshield includes a front arc-shaped windshield installed along the arc-shaped section. By adjusting the length of the right-angle section of the shaped tube on the right side panel and the bottom longitudinal beam of the right side panel, the right side panel can be on the same plane or different planes to achieve changes in the operator's cab space. This solves the problems of various configurations of the operator's cab with or without recesses, the inability to flexibly change the size according to the overall machine requirements, and the heavy operator's cab.

Description

Technical Field

[0001] This invention belongs to the field of vehicle frame technology, specifically relating to a modular crane operator's cab frame structure. Background Technology

[0002] Currently, crane operator cabs are mainly made using sheet metal stamping, requiring the investment of stamping dies for the entire crane frame, tooling fixtures, and a large number of dies, resulting in high die and tooling costs and a long development cycle. Significant dimensional changes hinder product expansion. For some markets, the operator cab's structural dimensions require substantial modifications to match the overall machine, especially for specialized products with many varieties and small batches, where existing sheet metal stamping structures are unsuitable.

[0003] like Figure 13 The crane operator's cab shown is constructed from a white body frame, formed by sheet metal stamping and welding, with some sections supported by profiles. It has numerous components, resulting in a large number of molds required, high costs, and a long development cycle. Furthermore, its frame structure is not conducive to large-scale modifications to accommodate special size requirements, such as enlarging or reducing the size of the operator's cab. Figure 14 The crane operator's cab frame shown is made of irregularly shaped tubes welded together, and the outer cover is made of sheet metal stamping and welding together. The operator's cab has a recess on one side or is flat without a recess. This irregularly shaped tube frame structure and sheet metal mold have a large investment, and the product is limited, making it difficult to accommodate multiple configurations with or without a recess on one side. Due to the heavy weight of the irregularly shaped tube frame structure, the upper field of vision is obstructed by the crossbeam, affecting the upper field of vision during hoisting. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a modular crane operator's cab frame structure, which solves the problems of various configurations of crane operator's cabs, including recessed and non-recessed cabs, as well as the issues of large mold investment, inability to flexibly change the size of the operator's cab according to the overall machine requirements, and the relatively heavy operator's cab.

[0005] The technical solution provided by this invention is as follows:

[0006] This invention provides a modular crane operator's cab frame structure, including a vehicle body frame, a door, a windshield, and an exterior skin. The vehicle body frame includes a left side panel, a right side panel, and multiple crossbeams welded between the left and right side panels. The door is located on the left side panel, and the windshield and exterior skin are fixed to the left and right side panels. Both the left and right side panels include shaped tubes and bottom longitudinal beams. The shaped tubes have a fan-shaped cross-section, and the shaped tubes and bottom longitudinal beams form a closed ring beam structure. The shaped tubes include an arc-shaped section at the front of the vehicle body frame and a right-angle section at the rear. The windshield includes a front arc-shaped windshield installed along the arc-shaped section. By adjusting the length of the right-angle section of the shaped tube on the right side panel and the bottom longitudinal beam of the right side panel, the right side panels can be placed on the same plane or different planes to achieve changes in the operator's cab space.

[0007] Furthermore, the windshield also includes a right windshield located on the right side of the enclosure, a left rear windshield located on the left side of the enclosure, and a rear windshield located on the right-angle section of the shaped tube.

[0008] Furthermore, when the right sides are on the same plane, the right-angle section of the shaped tube of the right side and the length of the bottom longitudinal beam of the right side are equal to those of the left side. The two ends of the shaped tube of the right side are connected to the bottom longitudinal beam of the right side and a transverse reinforcing beam is provided in the middle. The right windshield is installed above the reinforcing beam and the exterior skin is covered below the reinforcing beam.

[0009] Furthermore, when the right side enclosure is on a different plane, the length of the right-angle section of the shaped tube on the right side enclosure and the length of the bottom longitudinal beam of the right side enclosure are shorter than those of the left side enclosure. The two straight surfaces of the right-angle section of the shaped tube on the right side enclosure are respectively provided with vertical beams and diagonal bracing beams connected to the bottom longitudinal beam of the right side enclosure. The vertical beams and diagonal bracing beams are connected by horizontal beams below. The vertical beams, diagonal bracing beams and horizontal beams form an inwardly concave triangular plane. A transverse reinforcing beam is provided between the diagonal bracing beams and the arc-shaped section of the shaped tube on the right side enclosure. The left rear windshield is installed above the reinforcing beams and diagonal bracing beams, and the exterior skin is covered below the reinforcing beams and diagonal bracing beams.

[0010] Furthermore, the two ends of the arc-shaped section of the shaped tube are straightened and form a rounded corner structure with the right-angle section. The starting ends of the straight sections at both ends are provided with a front crossbeam and a top crossbeam, respectively. The ending ends of the straight sections at the bottom are provided with a front bottom crossbeam. The rounded corner structure is provided with a top rear crossbeam. The middle and bottom positions of the right-angle section are provided with a rear crossbeam and a rear bottom crossbeam, respectively. The non-straight sections of the arc-shaped section are fitted with a front arc-shaped windshield. The rear windshield is installed between the top rear crossbeam and the rear crossbeam. The areas between the front crossbeam and the front bottom crossbeam, the top crossbeam and the top rear crossbeam, and the rear crossbeam and the rear bottom crossbeam are all covered by an outer trim skin.

[0011] Furthermore, the left side panel also includes a pillar located at the straight section of the curved section of the irregular tube on the left side panel. The space enclosed by the pillar and the door frame assembled along the curved section is provided with a door. The door rotates around the pillar to open and close. The door is provided with a window located at the non-straight section of the curved section of the irregular tube on the left side panel. The area below the window is covered with an exterior skin.

[0012] Furthermore, an upwardly inclined reinforcing beam is provided between the right-angle section of the column and the irregular tube on the left side, the left rear windshield is installed above the reinforcing beam, and the exterior skin is covered below the reinforcing beam.

[0013] Furthermore, the central angle of the fan-shaped section is 90°, and the starting end of the straight section of the arc segment of the two shaped tubes is provided with a first straight edge and a second straight edge. The first straight edge and the second straight edge correspond to the two straight surfaces of the shaped tube. The first straight edge is set on the outside and is installed with the front arc windshield by the adhesive glass glue. The second straight edge is set on the inside and is matched with the door frame by the door sealing strip of the clip. When the outer skin is connected to the shaped tube, a folded edge is formed along the side of the two straight surfaces close to the arc surface.

[0014] Furthermore, the lengths of the irregularly shaped tubes or irregularly shaped tubes and multiple crossbeams or irregularly shaped tubes and bottom longitudinal beams can be uniformly adjusted to achieve the adjustment of the height, width, and length of the modular control cab's body frame.

[0015] Furthermore, the feature is that a top protective railing is fixedly provided above the left and right side enclosures.

[0016] Beneficial effects

[0017] This invention adopts a special-shaped tube main frame, a closed ring beam structure, and a front arc windshield to meet the needs of various operator cab body frame structure combinations. It solves the configuration and expansion needs of operator cabs for various types and small batches of crane models, reduces development costs, improves the structural strength of the operator cab, increases the maximum effective space inside the operator cab, improves the lifting visibility, and makes the structure lightweight. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the modular crane operator's cab frame structure of the present invention (the left diagram is a structural diagram of the modular crane operator's cab frame structure with a wind window, and the right diagram is a structural diagram of the modular crane operator's cab frame structure without a wind window).

[0019] Figure 2 This is an exploded view of the crane body frame of the modular crane operator's cab frame structure of the present invention;

[0020] Figure 3 This is a cross-sectional view of the irregular-shaped tube of the present invention;

[0021] Figure 4 This is a cross-sectional view of the irregular tube of the present invention (A, the cutting method of the irregular tube; B, a schematic diagram of the connection method between the cross-section of the irregular tube and the door frame and the front arc glass; C, a schematic diagram of the connection method between the cross-section of the irregular tube and the exterior skin).

[0022] Figure 5 This is a structural diagram of the closed frame beam on the left side of the present invention;

[0023] Figure 6 This is a structural diagram of the closed frame beam on the right side of the present invention (without the recess);

[0024] Figure 7This is a structural diagram of the right-side closed frame beam of the present invention (with a recess; the left side view is the front side view of the right-side closed frame beam, and the right side view is the rear side view of the right-side closed frame beam).

[0025] Figure 8 This is a diagram of the bottom closed frame beam structure of the present invention;

[0026] Figure 9 These are other closed frame beam structure diagrams of the present invention;

[0027] Figure 10 This is a modular structural diagram of the vehicle body frame width of the present invention;

[0028] Figure 11 This is a highly modular structural diagram of the vehicle body frame of the present invention;

[0029] Figure 12 This is a modular structural diagram of the vehicle body frame length of the present invention;

[0030] Figure 13 It is the structure of the existing crane operator's cab frame. Figure 1 ;

[0031] Figure 14 It is the structure of the existing crane operator's cab frame. Figure 2 .

[0032] Explanation of reference numerals in the attached drawings: 1. Body frame; 11. Left side panel; 111. Left side profile tube; 112. Pillar; 113. Left side reinforcing beam; 114. Left side bottom longitudinal beam; 115. Front window trim; 116. Door trim; 12. Right side panel; 121. Right side profile tube; 122. Right side reinforcing beam; 123. Right side bottom longitudinal beam; 124. Vertical beam; 125. Diagonal brace beam; 126. Horizontal beam; 13. Front side bottom crossbeam; 14. Front crossbeam; 15. Top crossbeam; 16. Top rear crossbeam; 17. Rear crossbeam; 18. Rear side bottom crossbeam; 2. Right windshield; 3. Front curved windshield; 4. Exterior trim; 5. Door; 51. Door frame; 6. Left rear windshield; 7. Rear windshield; 8. Door sealant; 9. Silicone sealant; 10. Window. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0034] In the description of this invention, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0035] The modular combination of the cab body frame of the present invention can meet the configuration of the cab with or without a recessed structure on one side; by increasing or decreasing the size of the frame, the length, height and width can be changed to meet the size requirements of different vehicle models.

[0036] Example 1

[0037] like Figures 1-6 As shown, this embodiment of the invention provides a modular crane operator's cab frame structure, including a vehicle frame 1, a door 5, a windshield, and an exterior skin 4. The vehicle frame 1 includes a left side panel 11, a right side panel 12, and multiple crossbeams welded between the left side panel 11 and the right side panel 12. The door 5 is located on the left side panel 11. The windshield and the exterior skin 4 are fixed on the left side panel 11 and the right side panel 12. The windshield includes a front arc windshield 3, a rear windshield 7, a right windshield 2, and a left rear windshield 6. Both the left side panel 11 and the right side panel 12 include shaped tubes and bottom longitudinal beams, namely, a left shaped tube 111, a left bottom longitudinal beam 114, a right shaped tube 121, and a right bottom longitudinal beam 123. The cross-section of the shaped tube is fan-shaped. The shaped tube and the bottom longitudinal beam form a closed ring beam structure. The shaped tube includes an arc-shaped section at the front of the vehicle frame 1 and a right-angle section at the rear. The front arc windshield 3 is installed along the arc-shaped section.

[0038] like Figures 1-2 As shown, the cockpit includes a body frame 1, a right windshield 2, a front arc windshield 3, an exterior skin 4, a door 5, a left rear windshield 6, and a rear windshield 7. The body frame 1 is welded together from a left side panel 11, a right side panel 12, a front side bottom crossbeam 13, a front crossbeam 14, a top crossbeam 15, a top rear crossbeam 16, a rear crossbeam 17, and a rear side bottom crossbeam 18.

[0039] like Figure 6 As shown, in this embodiment, the right-side planar structure is suitable for a cab configuration without recesses. The right-angle section of the right-side shaped tube 121 and the length of the right-side bottom longitudinal beam 123 are equal to those on the left side. The two ends of the right-side shaped tube 121 are connected to the right-side bottom longitudinal beam 123 and a transverse right-side reinforcing beam 122 is provided in the middle. The right windshield 2 is installed above the right-side reinforcing beam 122, and the exterior skin 4 is covered below the right-side reinforcing beam 122.

[0040] Specifically, the right side enclosure 12 is welded together from the right side shaped tube 121, the right side reinforcing beam 122, and the right side bottom longitudinal beam 123, forming a closed frame beam structure without recesses.

[0041] In this embodiment, the two ends of the arc-shaped section of the shaped tube are straightened and form a rounded corner structure with the right-angle section. The starting ends of the straight sections at both ends are provided with a front crossbeam 14 and a top crossbeam 15, respectively. The ending ends of the straight sections at the bottom are provided with a front bottom crossbeam 13. The rounded corner structure is provided with a top rear crossbeam 16. The middle and bottom positions of the right-angle section are provided with a rear crossbeam 17 and a rear bottom crossbeam 18, respectively. The non-straight sections of the arc-shaped section are equipped with a front arc-shaped windshield 3. The rear windshield is installed between the top rear crossbeam 16 and the rear crossbeam 17. The areas between the front crossbeam 14 and the front bottom crossbeam 13, between the top crossbeam 15 and the top rear crossbeam 16, and between the rear crossbeam 17 and the rear bottom crossbeam 18 are all covered by an outer trim skin 4.

[0042] In this embodiment, the left side panel 11 also includes a pillar 112. The pillar 112 is located at the straight part of the arc section of the left-side shaped tube 111. The space enclosed by the pillar 112 and the door frame 51 assembled along the arc section is provided with a door 5. The door 5 rotates around the pillar 112 to open and close. The door 5 is provided with a window 10 arranged along the non-straight part of the arc section of the left-side shaped tube 111. The area below the window 10 is covered with an exterior skin 4.

[0043] In this embodiment, an upwardly inclined left reinforcing beam 113 is provided between the right-angle section of the column 112 and the left-side irregular tube 111. The left rear windshield 6 is installed above the left reinforcing beam 113, and the exterior skin 4 is covered below the left reinforcing beam 113.

[0044] Specifically, such as Figure 5 As shown, the left side enclosure 11 is constructed by welding together a left-side irregular-shaped tube 111, a column 112, a left-side reinforcing beam 113, and a left-side bottom longitudinal beam 114, forming a closed frame beam structure on the left side. Figure 8 As shown, a closed frame beam structure at the bottom is constructed by welding together the left-side irregular tube 111, the right-side irregular tube 121, the front bottom crossbeam 13, the rear bottom crossbeam 18, the left-side bottom longitudinal beam 114, and the right-side bottom longitudinal beam 123. Figure 9 As shown, multiple other closed frame beam structures are constructed by welding the left-side irregular tube 111, the right-side irregular tube 121, the front bottom crossbeam 13, the front crossbeam 14, the top crossbeam 15, the top rear crossbeam 16, the rear crossbeam 17, and the rear bottom crossbeam 18.

[0045] In this embodiment, the central angle of the sector is 90°, such as... Figure 3As shown, the shaped tube, with a curved surface on one side and straight surfaces on both sides, has a certain degree of lightweighting. The starting end of the straight section of the curved section of the shaped tube on both sides is provided with a first straight edge, namely the front window edge strip 115 and a second straight edge, namely the door edge strip 116. The first straight edge and the second straight edge correspond to the two straight surfaces of the shaped tube, respectively. The front window edge strip 115 is set on the outside and is installed with the front curved windshield 3 by the adhered glass glue 9. The door edge strip 116 is set on the inside and cooperates with the door frame 51 by the door sealing strip 8 with a clamp. The door frame 51 ensures the sealing of the door 5 by pressing against the door sealing strip 8.

[0046] like Figure 4 As shown in (B), the left-side shaped tube 111 is welded to the front window trim 115 and the door trim 116. The front arc-shaped windshield 3 is bonded to the front window trim (i.e., the first straight edge) 115 with glass glue 9; the door sealing strip 8 is snapped onto the door trim (i.e., the second straight edge) 116, and the door frame 51 ensures the door's seal by pressing against the door sealing strip 8. Figure 4 As shown in (C), the outer skin 4 is welded to the left-side profiled tube 111 or the right-side profiled tube 112 to construct the body frame sheet metal structure. When the outer skin 4 is connected to the two profiled tubes, a folded edge is formed along the side of the two straight surfaces close to the curved surface.

[0047] In this embodiment, a top protective railing is fixedly provided above the left side enclosure 11 and the right side enclosure 12.

[0048] Example 2

[0049] This embodiment provides a modular crane operator's cab frame structure. The main difference from the first embodiment is that the right-side enclosure structure is suitable for operator's cab configurations with recesses, such as... Figure 7 As shown, the right-angled section of the right-side shaped tube 121 and the right-side bottom longitudinal beam 123 are shorter than those on the left. The two straight surfaces of the right-angled section of the right-side shaped tube 121 are respectively provided with a vertical beam 124 and a diagonal bracing beam 125 connected to the right-side bottom longitudinal beam 123. The vertical beam 124 and the diagonal bracing beam 125 are connected by a horizontal beam 126 below. The vertical beam 124, the diagonal bracing beam 125 and the horizontal beam 126 form an inwardly concave triangular plane. A transverse right-side reinforcing beam 122 is provided between the diagonal bracing beam 125 and the arc-shaped section of the right-side shaped tube 121. The left rear windshield 6 is installed above the right-side reinforcing beam 122 and the diagonal bracing beam 125. The exterior skin 4 is covered below the right-side reinforcing beam 122 and the diagonal bracing beam 125.

[0050] Specifically, the right side enclosure 12 is constructed by welding together a right-side irregular tube 121, a right-side reinforcing beam 122, a right-side bottom longitudinal beam 123, a vertical beam 124, a diagonal bracing beam 125, and a horizontal beam 126, forming a closed frame beam structure with a recess. This recessed structure, on the one hand, avoids the crane turntable, and on the other hand, increases the width of the operator's cab, thereby maximizing the effective width of the operator's cab.

[0051] Example 3

[0052] This embodiment provides a modular crane operator's cab frame structure. By uniformly adjusting the length of the special-shaped tube or the special-shaped tube and multiple crossbeams or the special-shaped tube and bottom longitudinal beam, the height, width and length of the modular operator's cab frame 1 can be adjusted, which is suitable for operator's cab configurations of different sizes.

[0053] Specifically, such as Figure 10 As shown, by varying the lengths of the front bottom crossbeam 13, front crossbeam 14, top crossbeam 15, top rear crossbeam 16, rear crossbeam 17, and rear bottom crossbeam 18, a modular combination method for the cab body frame is achieved. This changes the width of the cab, thus altering the interior space and enabling both compact and spacious configurations (spacious configuration: freeing up lateral movement space). Figure 11 As shown, by varying the height of the left-side shaped tube 111 and the right-side shaped tube 121, a modular combination method for the operator's cab frame is achieved. This changes the height of the operator's cab, thus altering the interior space and enabling both compact and spacious configurations (spacious configuration: freeing up height for movement). Figure 12 As shown, by varying the lengths of the left-side irregular tube 111, the right-side irregular tube 121, the left-side bottom longitudinal beam 114, the reinforcing beam, and the right-side bottom longitudinal beam 123, a modular combination method for the cab body frame is achieved. This changes the length of the cab, thereby altering the interior space and enabling both compact and spacious configurations (spacious configuration: freeing up front and rear movement space, seat front and rear movement space, and air conditioning arrangement).

[0054] This invention proposes a crane operator's cab frame structure, which adopts a special-shaped tube main frame, a closed frame beam structure, and a front arc windshield structure. It has high overall strength and good visibility during overhead lifting. At the same time, it can meet the needs of various operator's cab body frame structure combinations, solve the configuration and expansion needs of operator's cabs for various types and small batches of crane models, reduce development costs, and improve the structural strength of the operator's cab.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A modular crane cab frame structure, characterized in that, The body frame includes a left side wall, a right side wall and a plurality of cross beams welded between the left side wall and the right side wall, the door is arranged on the left side wall, the windshield and the outer skin are fixed on the left side wall and the right side wall, the left side wall and the right side wall each include a profiled tube and a bottom longitudinal beam, the profiled tube has a fan-shaped cross section, the profiled tube and the bottom longitudinal beam form a closed ring beam structure, the profiled tube includes an arc-shaped section at a front part of the body frame and a right-angle section at a rear part, the windshield includes a front circular arc windshield arranged along the arc-shaped section, the length of the right-angle section of the profiled tube of the right side wall and the length of the bottom longitudinal beam of the right side wall are adjusted so that the right side wall is in the same plane or different planes to realize the change of the operating chamber space. The windshield further includes a right windshield arranged on the right side wall, a left rear windshield arranged on the left side wall and a rear windshield arranged on the right-angle section of the profiled tube. When the right side wall is in different planes, the length of the right-angle section of the profiled tube of the right side wall and the length of the bottom longitudinal beam of the right side wall are shorter than those of the left side wall, two straight faces of the right-angle section of the profiled tube of the right side wall are respectively provided with a vertical beam and an inclined support beam connected with the bottom longitudinal beam of the right side wall, the vertical beam and the inclined support beam are connected by a horizontal beam below, the vertical beam, the inclined support beam and the horizontal beam form a triangular plane concave inwardly, a transverse reinforcing beam is arranged between the inclined support beam and the arc-shaped section of the profiled tube of the right side wall, the left rear windshield is arranged above the reinforcing beam and the inclined support beam, and the outer skin covers below the reinforcing beam and the inclined support beam.

2. Modular crane cab frame structure according to claim 1, characterized in that, When the right side wall is in the same plane, the length of the right-angle section of the profiled tube of the right side wall and the length of the bottom longitudinal beam of the right side wall are equal to those of the left side wall, the two ends of the profiled tube of the right side wall are connected to the bottom longitudinal beam of the right side wall with a transverse reinforcing beam arranged in the middle, the right windshield is arranged above the reinforcing beam, and the outer skin covers below the reinforcing beam.

3. Modular crane cab frame structure according to claim 1, characterized in that, The two ends of the arc-shaped section of the profiled tube are flattened and form a round corner structure with the right-angle section, the starting end of the flattened part of each end is respectively provided with a front cross beam and a top cross beam, the ending end of the flattened part of the lower end is provided with a front side bottom cross beam, a top rear cross beam is arranged at the round corner structure, a rear cross beam and a rear side bottom cross beam are respectively arranged at the middle part and the bottom part of the right-angle section, the front circular arc windshield is arranged on the non-flattened part of the arc-shaped section, the rear windshield is arranged between the top rear cross beam and the rear cross beam, and the outer skin covers between the front cross beam and the front side bottom cross beam, between the top cross beam and the top rear cross beam and between the rear cross beam and the rear side bottom cross beam.

4. Modular crane cab frame structure according to claim 3, characterized in that, The left side wall further includes a stand column arranged at the flattened part of the arc-shaped section of the profiled tube of the left side wall, a door is arranged in a space enclosed by the stand column and a door frame arranged along the arc-shaped section of the profiled tube of the left side wall, the door is opened and closed by rotating around the stand column, a window is arranged on the non-flattened part of the arc-shaped section of the profiled tube of the left side wall, and the outer skin covers below the window.

5. Modular crane cab frame structure according to claim 4, characterized in that, An upwardly inclined reinforcing beam is arranged between the stand column and the right-angle section of the profiled tube of the left side wall, the left rear windshield is arranged above the reinforcing beam, and the outer skin covers below the reinforcing beam.

6. Modular crane cab frame structure according to claim 4, characterized in that, The central angle of the sector is 90°, the starting end of the flat part of the arc-shaped section of the two side profiled tubes is provided with a first straight edge and a second straight edge, the first straight edge and the second straight edge correspond to the two straight surfaces of the profiled tube respectively, the first straight edge is arranged outward and is installed with the front circular arc windshield through the glass cement, the second straight edge is arranged inward and is matched with the door frame through the door sealing strip of the clamping sleeve, and the outer skin is formed with a folded edge along the side of the two straight surfaces close to the arc surface when the outer skin is connected with the profiled tube.

7. Modular crane cab frame structure according to claim 1, characterized in that, The length of the profiled tube or the profiled tube and the plurality of cross beams or the profiled tube and the bottom longitudinal beam is uniformly adjusted, so that the height, width and length of the vehicle body frame of the modularized operating room are adjusted.

8. Modular crane cab frame structure according to claim 1, characterized in that, The top protective fence is fixedly arranged above the left side wall and the right side wall.

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