Cab structure and construction machine

Abstract

The utility model provides a kind of cab structure and engineering machinery, wherein, cab structure includes: cab frame;Stand, the lower end of stand is connected on cab frame, stand can overturn towards the rear of cab frame;Shield plate, set in the top of stand, wherein, the lower end of stand and cab frame have first connection point, the size of first connection point and cab frame satisfies following relationship: 1.5≤a / b≤2, wherein, a is the distance of first connection point to the front side of cab frame, b is the distance of first connection point to the rear side of cab frame. By optimizing cab structure, the distance size of first connection point of stand and cab frame before and after cab frame, so that stand is set close to the middle part of cab frame. Thus, when stand is reversed, it occupies smaller rear space of cab frame, so the distance of other structures of engineering machinery is shorter, which is beneficial to the miniaturization design of engineering machinery.

Description

Technical Field

[0001] This utility model relates to the field of construction equipment technology, specifically to cab structure and engineering machinery. Background Technology

[0002] The open cab of construction machinery is equipped with a shield on the top to prevent falling rocks and other foreign objects from injuring the operator. However, the shield takes up a lot of space, making it difficult for construction machinery to pass through in some low-lying conditions.

[0003] To address this issue, some construction machinery features a removable roof for the cab. However, disassembling and converting the roof on this type of machinery is cumbersome, requires specialized tools, and is time-consuming. Other construction machinery uses a rear-folding roof design. When top protection is needed, the roof swings to a vertical position to protect the driver. When top protection is not required, the roof swings rearward, reducing the overall height of the machinery.

[0004] However, in a tilting cab, the rearward swing of the roof requires additional space at the rear of the cab, and other structures of the construction machinery need to be moved back a certain distance, ultimately resulting in a longer overall length of the construction machinery, which is not conducive to miniaturization design. Utility Model Content

[0005] In view of this, the present invention provides a cab structure and engineering machinery to solve the problem that the existing tilting cab swings backward and occupies a large space, which is not conducive to the miniaturization design of engineering machinery.

[0006] In a first aspect, this utility model provides a cab structure, including: a cab frame; a column, the lower end of which is connected to the cab frame and can be flipped toward the rear of the cab frame; and a cover plate disposed on the top of the column, wherein the lower end of the column has a first connection point with the cab frame, and the dimensions of the first connection point and the cab frame satisfy the following relationship: 1.5≤a / b≤2, where a is the distance from the first connection point to the front side of the cab frame and b is the distance from the first connection point to the rear side of the cab frame.

[0007] Optionally, the pillar includes a lower pillar and an upper pillar rotatably connected above the lower pillar. The upper pillar can be flipped backward relative to the lower pillar. The lower end of the lower pillar is connected to the cab frame, and the upper end of the upper pillar is connected to the cover plate. The dimensions of the lower pillar and the upper pillar satisfy the following relationship: 0.4≤c / d≤0.6, where c is the length of the lower pillar and d is the length of the upper pillar.

[0008] Optionally, the shield includes a fixed plate and an upper flap rotatably connected to the front side of the fixed plate. The upper flap can be flipped upward and backward relative to the fixed plate. An upper column is connected to the front side of the fixed plate, and the upper column and the fixed plate have a second connection point. The dimensions of the second connection point and the shield satisfy the following relationship: 1.5≤e / f≤2, where e is the distance from the second connection point to the front side of the shield, and f is the distance from the second connection point to the rear side of the shield.

[0009] Alternatively, 1.7 ≤ a / b ≤ 1.8; and / or 0.5 ≤ c / d ≤ 0.55; and / or 1.7 ≤ e / f ≤ 1.8.

[0010] Optionally, the upper column has a vertical position and a rearward position relative to the lower column, and the cab structure also includes a positioning structure for fixing the upper column in the vertical position or in the rearward position.

[0011] Optionally, the positioning structure includes: a rotating sleeve, a lower column fixedly mounted on the rotating sleeve, and an upper column whose lower end extends into the rotating sleeve and is rotatably connected to the rotating sleeve; a first positioning hole and a second positioning hole spaced apart, located on one of the rotating sleeve and the lower column; a third positioning hole located on the other of the rotating sleeve and the lower column, wherein the first positioning hole and the third positioning hole are aligned when the upper column is in a vertical position, and the second positioning hole and the third positioning hole are aligned when the upper column is in a swing-back position; and a positioning pin for passing through the first positioning hole and the third positioning hole, or for passing through the second positioning hole and the third positioning hole.

[0012] Optionally, the upper flap has an unfolded position and a folded position relative to the fixed plate. The cab structure also includes a first fixing structure and a second fixing structure. The first fixing structure is used to fix the upper flap in the unfolded position, and the second fixing structure is used to fix the upper flap in the folded position.

[0013] Optionally, the first fixing structure includes: a first hook disposed on the lower surface of the fixing plate and located on the front side of the fixing plate; a first pull ring disposed on the lower surface of the upper flip plate and located on the rear side of the upper flip plate; and / or, the second fixing structure includes: a second hook disposed on the side of the upper flip plate and located on the rear side of the upper flip plate; a second pull ring disposed on the side of the fixing plate and located on the front side of the fixing plate.

[0014] Optionally, the fixing plate includes a U-shaped first support tube and a first plate body disposed inside the first support tube; the upper flip plate includes a U-shaped second support tube and a second plate body disposed inside the second support tube; the openings of the first support tube and the second support tube are arranged opposite to each other; a buffer pad is provided at the end of the first support tube and / or the end of the second support tube; and / or, a first gas strut is provided between the upper column and the cab frame; and / or, a second gas strut is provided between the upper column and the upper flip plate.

[0015] In a first aspect, this utility model provides an engineering machine, including the aforementioned cab structure.

[0016] Beneficial effects:

[0017] By optimizing the distance between the first connection point of the column and the cab frame in the cab structure and the front and rear of the cab frame, the column is positioned closer to the center of the cab frame. This results in the column occupying less rear space in the cab frame when tilting backward, thus reducing the rearward clearance distance for other structures on the construction machinery and facilitating miniaturization. Therefore, this invention solves the problem of existing tilting cabs occupying large spaces when tilting backward, which hinders miniaturization of construction machinery. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 A schematic diagram of an embodiment of the cab structure of this utility model is shown;

[0020] Figure 2 It shows Figure 1 Side view of the cab structure;

[0021] Figure 3 It shows Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 It shows Figure 2 Enlarged view of point B in the middle;

[0023] Figure 5 It shows Figure 1 A schematic diagram of the rotating sleeve in the middle cab structure;

[0024] Figure 6 It shows Figure 1 A structural diagram showing the upper pillar of the middle cab structure in a vertical position and the upper flap in a folded position;

[0025] Figure 7 It shows Figure 1 A structural diagram showing the upper pillar of the middle cab structure in the rearward position and the upper flap in the folded position;

[0026] Figure 8 It shows Figure 7 Enlarged view of point C in the middle;

[0027] Figure 9 It shows Figure 1 A structural diagram of the front side of the fixing plate of the middle cab structure;

[0028] Figure 10 It shows Figure 1 A schematic diagram of the assembly of the first support tube and the buffer pad in the middle cab structure.

[0029] Explanation of reference numerals in the attached figures:

[0030] 10. Cab frame;

[0031] 20. Column; 21. Lower column; 22. Upper column;

[0032] 30. Baffle plate; 31. Fixing plate; 311. First support tube; 312. First plate body; 32. Upward flip plate; 321. Second support tube; 322. Second plate body;

[0033] 40. Positioning structure; 41. First positioning hole; 42. Second positioning hole; 43. Third positioning hole; 44. Rotating sleeve; 45. Positioning pin;

[0034] 50. First fixing structure; 51. First hook; 52. First pull ring;

[0035] 60. Second fixing structure; 61. Second hook; 62. Second pull ring;

[0036] 70. Cushioning pad;

[0037] 80. First gas strut;

[0038] 90. Second gas strut;

[0039] 100. First connection point;

[0040] 200. Second connection point. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0042] like Figure 1 and Figure 2 As shown, an embodiment of the cab structure according to this application includes a cab frame 10, a column 20, and a baffle plate. The lower end of the column 20 is connected to the cab frame 10, and the column 20 is capable of rotating towards the rear of the cab frame 10. The baffle plate 30 is disposed on the top of the column 20. Further, the lower end of the column 20 has a first connection point 100 with the cab frame 10, and the dimensions of the first connection point 100 and the cab frame 10 satisfy the following relationship:

[0043] 1.5≤a / b≤2;

[0044] Where a is the distance from the first connection point 100 to the front side of the cab frame 10, and b is the distance from the first connection point 100 to the rear side of the cab frame 10.

[0045] By optimizing the distance between the first connection point of the column 20 and the cab frame 10 and the front and rear of the cab frame 10 in the cab structure, the column 20 is positioned closer to the center of the cab frame 10. This results in the column 20 occupying less rear space in the cab frame 10 when it tilts backward, thus reducing the rearward clearance distance for other structures on the construction machinery and facilitating miniaturization. Therefore, the technical solution of this embodiment solves the problem in the prior art where the tilting cab occupies a large amount of space when tilting backward, hindering miniaturization of construction machinery.

[0046] First, it should be noted that in this embodiment, the proportions of each dimension are calculated in the same unit, and all dimensions mentioned in this embodiment are millimeters (mm).

[0047] like Figure 1 and Figure 2 As shown, the cab frame 10 generally includes a seat mounting plate, a floor located at the bottom front of the seat mounting plate, and a front baffle located at the front of the floor, extending vertically. A rear partition is provided at the rear of the cab frame 10, and a front partition is provided above the front baffle. A rearview mirror is provided on the front partition, and openable and closable doors are provided on the left and right sides of the cab, through which operators can enter or leave the cab frame.

[0048] Furthermore, from Figure 1 and Figure 2 As can be seen, the cab structure also features two symmetrical columns 20. The lower ends of the columns 20 are connected to the cab frame 10, and the connection points between the columns 20 and the cab frame 10 form the first connection point 100. The connection between the columns 20 and the cab frame 10 can be achieved through welding, fastener connection, etc. The upper ends of both columns 20 are connected to the baffle plate 30.

[0049] Furthermore, the column 20 can be flipped backward. For example... Figure 2 As shown, when the operator's head requires protection, the column 20 is in a vertical position, and the shield 30 protects the operator's headspace; that is, the cab structure is an open cab with a protective roof. Figure 7 As shown, when the construction machinery needs to pass through low-ceilinged spaces, the column 20 swings backward, at which point the cab structure is in a folded state, and the overall height of the cab structure is reduced, increasing the passability of the construction machinery.

[0050] Furthermore, this embodiment optimizes the configuration of the column 20, that is, the dimensions of the first connection point 100 and the cab frame 10 satisfy the following relationship:

[0051] 1.5≤a / b≤2;

[0052] Where a is the distance from the first connection point 100 to the front side of the cab frame 10, and b is the distance from the first connection point 100 to the rear side of the cab frame 10.

[0053] like Figure 2 As shown, a is the distance from the first connection point 100 to the front baffle of the cab frame 10, and b is the distance from the first connection point 100 to the rearmost side of the cab frame 10.

[0054] This arrangement ensures that the connection point between the column 20 and the cab frame 10 is located near the middle of the cab frame 10. Therefore, when the column 20 is flipped backward, the column 20 and the cover plate 30 occupy little space on the rear side of the cab frame 10, which is beneficial for the miniaturization design of engineering machinery.

[0055] For example, the value of a / b can be 1.5, 1.55, 1.6, 1.65, 1.7, 1.75, 1.8, 1.85, 1.9, 1.95, 2, etc., any value between the two numbers.

[0056] Preferably, 1.7 ≤ a / b ≤ 1.8.

[0057] For example, the value of a / b can be 1.7, 1.71, 1.72, 1.73, 1.74, 1.75, 1.76, 1.77, 1.78, 1.79, 1.8, etc., any value between the two numbers.

[0058] like Figure 1 and Figure 2As shown, in the technical solution of this embodiment, the column 20 includes a lower column 21 and an upper column 22 rotatably connected above the lower column 21. The upper column 22 can be flipped backward relative to the lower column 21. The lower end of the lower column 21 is connected to the cab frame 10, and the upper end of the upper column 22 is connected to the cover plate 30.

[0059] The dimensions of the lower column 21 and the upper column 22 satisfy the following relationship: 0.4≤c / d≤0.6, where c is the length of the lower column 21 and d is the length of the upper column 22.

[0060] Specifically, the lower pillar 21 is fixed, with its lower end connected to the cab frame 10 by welding or fasteners. The upper pillar 22 is movable, allowing it to tilt backward relative to the lower pillar 21. The upper pillar 22 is fixed to the cover plate 30 by welding or fasteners. Therefore, when the upper pillar 22 tilts backward, it can cause the cover plate 30 to tilt backward as well.

[0061] Furthermore, by setting the value of c / d between 0.4 and 0.06, meaning the length of the upper column 22 is greater than the length of the lower column, the overall height of the cab structure can be reduced as much as possible when the upper column 22 is flipped backward. This results in minimal height space occupation when the cab structure is in an open cab state with the folded design, allowing the construction machinery to pass through narrower spaces and improving its maneuverability.

[0062] For example, the value of c / d can be 0.4, 0.41, 0.42, 0.43, 0.44, 0.45, 0.46, 0.47, 0.48, 0.49, 0.5, 0.51, 0.52, 0.53, 0.54, 0.55, 0.56, 0.57, 0.58, 0.59, 0.6, etc., any value between two numbers.

[0063] Preferably, 0.5 ≤ c / d ≤ 0.55.

[0064] For example, the value of c / d can be 0.5, 0.51, 0.52, 0.53, 0.54, 0.55, etc., any value between two numbers.

[0065] like Figure 2 As shown, in this embodiment, the shielding plate 30 includes a fixed plate 31 and an upward-flipping plate 32 rotatably connected to the front side of the fixed plate 31. The upward-flipping plate 32 can flip upward and backward relative to the fixed plate 31. An upper column 22 is connected to the front side of the fixed plate 31, and the upper column 22 and the fixed plate 31 have a second connection point 200. The dimensions of the second connection point 200 and the shielding plate 30 satisfy the following relationship:

[0066] 1.5≤e / f≤2;

[0067] Where e is the distance from the second connection point 200 to the front side of the shield 30, and f is the distance from the second connection point 200 to the rear side of the shield 30.

[0068] Specifically, the fixing plate 31 is fixedly connected to the upper end of the upper column 22. The two upper columns 22 and the fixing plate 31 can be connected by welding or fasteners, and the connection point between the upper column 22 and the fixing plate 31 forms a second connection point 200, which is located near the front side of the fixing plate 31.

[0069] Furthermore, a flip-up plate 32 is provided on the front side of the fixed plate 31, and the two are connected by a pivot, so the flip-up plate 32 can flip upward and backward relative to the fixed plate 31. Figure 2 As shown, when the cab structure is an open cab with a protective roof, the upper flap 32 is equivalent to the fixed plate 31, so that the upper flap 32 and the fixed plate 31 together form a protective shield 30. Figure 6 and Figure 7 As shown, when the cab structure is in a folded state, the upper flap 32 is folded onto the fixed plate 31, thereby reducing the height of the cab structure and the space occupied.

[0070] Furthermore, this embodiment optimizes the position of the upper column 22 connected to the baffle plate 30 by setting the e / f value between 1.5 and 2, that is, the connection position between the upper column 22 and the baffle plate 30 is closer to the middle position of the baffle plate 30. This ensures that when the baffle plate 30 is subjected to external forces (such as wind, collisions with foreign objects, etc.) during the operation of the construction machinery, the torque applied to the upper column 22 is relatively small. Figure 2 In the middle, e and f are both lever arms, and they are relatively small. Therefore, the baffle plate 30 and the upper column 22 are not easily damaged, especially the connection point between the baffle plate 30 and the upper column 22 is not easily damaged.

[0071] For example, the value of e / f can be 1.5, 1.55, 1.6, 1.65, 1.7, 1.75, 1.8, 1.85, 1.9, 1.95, 2, etc., any value between two numbers.

[0072] Preferably, 1.7 ≤ e / f ≤ 1.8;

[0073] The values ​​of e / f can be 1.7, 1.71, 1.72, 1.73, 1.74, 1.75, 1.76, 1.77, 1.78, 1.79, 1.8, etc., any value between two numbers.

[0074] like Figure 2 , Figure 3 , Figures 5 to 8 As shown, in the technical solution of this embodiment, the upper column 22 has a vertical position and a rearward swing position relative to the lower column 21. The cab structure also includes a positioning structure 40, which is used to fix the upper column 22 in the vertical position or in the rearward swing position.

[0075] Specifically, the positioning structure 40 can fix the upper column 22 relative to the lower column 21 in a vertical or rearward position, thereby preventing the upper column 22 from shaking when the construction machinery is working, thus ensuring the driving safety of the operator.

[0076] like Figure 2 , Figure 3 , Figures 5 to 8 As shown, in the technical solution of this embodiment, the positioning structure 40 includes a rotating sleeve 44, a first positioning hole 41, a second positioning hole 42, a third positioning hole 43, and a positioning pin 45.

[0077] First, let's introduce the structure of the rotating sleeve 44, such as... Figure 5 As shown, the rotating sleeve 44 includes two opposing side plates and a front plate located between the two side plates. The cross-sectional shape of the rotating sleeve 44 is approximately "U". The upper end of the lower column 21 is fixed to the lower side of the rotating sleeve 44, and the two can be connected together by welding, connectors, positioning pins, etc. The lower end of the upper column 22 extends into the rotating sleeve 44 and is rotatably connected to the rotating sleeve 44 by rotation. Therefore, the upper column 22 can rotate relative to the rotating sleeve 44, that is, it can rotate relative to the lower column 21.

[0078] Furthermore, both side plates of the rotating sleeve 44 are provided with a first positioning hole 41 and a second positioning hole 42, from... Figure 5 As can be seen, the second positioning hole 42 is located on the rear side below the first positioning hole 41.

[0079] Furthermore, a third positioning hole 43 is provided at the lower end of the upper column 22, and the third positioning hole 43 is located above the rotational connection between the upper column 22 and the rotating sleeve 44.

[0080] from Figure 3 As can be seen, when the upper column 22 is in a vertical position, the third positioning hole 43 is aligned with the first positioning hole 41. At this time, the positioning pin 45 is inserted into the third positioning hole 43 and the first positioning hole 41 to fix the upper column 22 in a vertical position.

[0081] from Figure 7 and Figure 8 As can be seen, when the upper column 22 is in the rear swing position, the third positioning hole 43 is aligned with the second positioning hole 42. At this time, the positioning pin 45 is inserted into the third positioning hole 43 and the second positioning hole 42 to fix the upper column 22 in the rear swing position.

[0082] When it is necessary to switch the upper column 22 between the vertical position and the rearward position, remove the positioning pin 45 to allow the upper column 22 to swing to the corresponding position, and then insert the positioning pin 45.

[0083] Of course, those skilled in the art will understand that the positions of the first positioning hole 41, the second positioning hole 42, and the third positioning hole 43 can be interchanged. That is, the first positioning hole 41 and the second positioning hole 42 are set on the upper column 22, and the third positioning hole 43 is set on the rotating sleeve 44, which is also a feasible implementation.

[0084] like Figure 2 , Figure 4 , Figure 6 , Figure 7 and Figure 9 As shown, the upper flap 32 has an unfolded position and a folded position relative to the fixed plate 31. The cab structure also includes a first fixed structure 50 and a second fixed structure 60. The first fixed structure 50 is used to fix the upper flap 32 in the unfolded position, and the second fixed structure 60 is used to fix the upper flap 32 in the folded position.

[0085] Specifically, the first fixing structure 50 can fix the upper flap 32 in the unfolded position, thereby preventing the upper flap 32 from shaking relative to the fixed plate 31 during the operation of the construction machinery and ensuring the safety of the operator.

[0086] Furthermore, the second fixing structure 60 can fix the upper flap 32 in the folded position, thereby preventing the upper flap 32 from shaking relative to the fixed plate 31 during the operation of the construction machinery and ensuring the safety of the operator.

[0087] like Figure 2 and Figure 4 As shown, in the technical solution of this embodiment, the first fixing structure 50 includes a first hook 51 and a first pull ring 52. The first hook 51 is disposed on the lower surface of the fixing plate 31 and located on the front side of the fixing plate 31. The first pull ring 52 is disposed on the lower surface of the upper flip plate 32 and located on the rear side of the upper flip plate 32.

[0088] from Figure 2 As can be seen, when the upper flap 32 is in the unfolded position, the first hook 51 and the first pull ring 52 are close to each other. At this time, the first pull ring 52 is put on the first hook 51, and then the handle of the first pull ring 52 is pulled away from the first hook 51. The first pull ring 52 locks itself and fixes the first hook 51, thereby fixing the upper flap 32 in the unfolded position.

[0089] Furthermore, by pushing the handle of the first pull ring 52 upward, the first pull ring 52 and the first hook 51 can be unlocked, thereby rotating the upper flip plate 32.

[0090] from Figure 6 As can be seen, when the upper flap 32 is in the folded position, the second hook 61 and the second pull ring 62 are close to each other. At this time, the second pull ring 62 is put on the second hook 61, and then the handle of the second pull ring 62 is pulled away from the second hook 61. The second pull ring 62 locks itself and fixes the second hook 61, thereby fixing the upper flap 32 in the unfolded position.

[0091] Furthermore, by pushing the handle of the second pull ring 62 upward, the second pull ring 62 and the second hook 61 can be unlocked, thereby rotating the upper flip plate 32.

[0092] Figure 9 The structure of the second pull ring 62 is shown. The structure of the first pull ring 52 is basically the same as that of the second pull ring 62, and can be referred to for reference. Figure 9 The content.

[0093] like Figure 2 As shown, in this embodiment, the fixing plate 31 includes a U-shaped first support tube 311 and a first plate body 312 disposed inside the first support tube 311. The flip plate 32 includes a U-shaped second support tube 321 and a second plate body 322 disposed inside the second support tube 321. The openings of the first support tube 311 and the second support tube 321 are arranged opposite to each other, with the end of the first support tube 311...

[0094] Specifically, both the first support tube 311 and the second support tube 321 serve as a frame, and both can be formed from round tubes or square steel. In addition, the first support tube 311 and the second support tube 321 are roughly U-shaped, and the corners can be rounded, right angles, or other angles, etc.

[0095] Furthermore, both the first plate 312 and the second plate 322 serve to form a supporting surface.

[0096] Those skilled in the art will understand that when the upper flap 32 is flipped from the folded position to the unfolded position, the ends of the first support tube 311 and the second support tube 321 are prone to collision, resulting in abnormal noise or structural damage. Therefore, in this embodiment, a buffer pad 70 is provided at the end of the first support tube 311. The buffer pad 70 can buffer the collision between the ends of the first support tube 311 and the second support tube 321, thereby reducing abnormal noise and protecting the structure.

[0097] Optionally, buffer pads 70 are provided at both ends of the first support tube 311.

[0098] like Figure 10As shown, since the cross-section of the first support tube 311 is circular, the buffer pad 70 is also disc-shaped, and its outer surface is flush with the outer surface of the first support tube 311. A through hole is provided in the center of the buffer pad 70, and a threaded hole is provided on the end face of the first support tube 311. The bolt passes through the through hole and is tightened in the threaded hole. Simultaneously, the bolt head does not protrude from the outer surface of the buffer pad 70, thereby preventing the bolt head from colliding with the end of the second support tube 321.

[0099] Optionally, a buffer pad 70 may be provided at the end of the second support tube 321, or buffer pads may be provided at the ends of both the first support tube 311 and the second support tube 321.

[0100] like Figure 2 As shown in the technical solution of this embodiment, a first gas strut 80 is provided between the upper column 22 and the cab frame 10. When the upper column 22 moves between the vertical position and the rearward position, the first gas strut 80 can play a role in buffering and assisting, preventing the upper column 22 from moving too fast and ensuring the safety of the operator.

[0101] like Figure 2 As shown in the technical solution of this embodiment, a second gas strut 90 is provided between the upper column 22 and the upper flip plate 32. When the upper flip plate 32 moves between the unfolded position and the folded position, the second gas strut 90 can play a role in buffering and assisting, preventing the upper flip plate 32 from moving too fast and ensuring the safety of the operator.

[0102] This application also provides an engineering machine, including the above-described cab structure.

[0103] Alternatively, the construction machinery can be loaders, excavators, etc.

[0104] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A driver's cab structure, characterized in that, include: Cab frame (10); A column (20) is provided, the lower end of which is connected to the cab frame (10), and the column (20) is capable of flipping toward the rear of the cab frame (10). A baffle plate (30) is provided on the top of the column (20). The lower end of the column (20) has a first connection point (100) with the cab frame (10), and the dimensions of the first connection point (100) and the cab frame (10) satisfy the following relationship: 1.5≤a / b≤2 Wherein, a is the distance from the first connection point (100) to the front side of the cab frame (10), and b is the distance from the first connection point (100) to the rear side of the cab frame (10).

2. The cab structure according to claim 1, characterized in that, The column (20) includes a lower column (21) and an upper column (22) rotatably connected above the lower column (21). The upper column (22) is capable of flipping backward relative to the lower column (21). The lower end of the lower column (21) is connected to the cab frame (10), and the upper end of the upper column (22) is connected to the cover plate (30). The dimensions of the lower column (21) and the upper column (22) satisfy the following relationship: 0.4≤c / d≤0.6, Wherein, c is the length of the lower column (21) and d is the length of the upper column (22).

3. The cab structure according to claim 2, characterized in that, The shield (30) includes a fixed plate (31) and an upper flip plate (32) rotatably connected to the front side of the fixed plate (31). The upper flip plate (32) can flip upward and backward relative to the fixed plate (31). The upper column (22) is connected to the front side of the fixed plate (31), and the upper column (22) and the fixed plate (31) have a second connection point (200). The dimensions of the second connection point (200) and the shield (30) satisfy the following relationship: 1.5≤e / f≤2, Wherein, e is the distance from the second connection point (200) to the front side of the shield (30), and f is the distance from the second connection point (200) to the rear side of the shield (30).

4. The cab structure according to claim 3, characterized in that, 1.7 ≤ a / b ≤ 1.8; and / or, 0.5 ≤ c / d ≤ 0.55; and / or, 1.7≤e / f≤1.

8.

5. The cab structure according to any one of claims 2 to 4, characterized in that, The upper column (22) has a vertical position and a rearward position relative to the lower column (21). The cab structure also includes a positioning structure (40), which is used to fix the upper column (22) in the vertical position or in the rearward position.

6. The cab structure according to claim 5, characterized in that, The positioning structure (40) includes: Rotating sleeve (44), the lower column (41) is fixedly mounted on the rotating sleeve (44), and the lower end of the upper column (42) extends into the rotating sleeve (44) and is rotatably connected to the rotating sleeve (44); A first positioning hole (41) and a second positioning hole (42) are provided at intervals on one of the rotating sleeve (44) and the lower column (21); The third positioning hole (43) is provided on the other of the rotating sleeve (44) and the lower column (21). When the upper column (22) is in the vertical position, the first positioning hole (41) and the third positioning hole (43) are aligned. When the upper column (22) is in the rear swing position, the second positioning hole (42) and the third positioning hole (43) are aligned. The positioning pin (45) is used to pass through the first positioning hole (41) and the third positioning hole (43), or to pass through the second positioning hole (42) and the third positioning hole (43).

7. The cab structure according to claim 3 or 4, characterized in that, The upper flap (32) has an unfolded position and a folded position relative to the fixed plate (31). The cab structure also includes a first fixed structure (50) and a second fixed structure (60). The first fixed structure (50) is used to fix the upper flap (32) in the unfolded position, and the second fixed structure (60) is used to fix the upper flap (32) in the folded position.

8. The cab structure according to claim 7, characterized in that, The first fixing structure (50) includes: The first hook (51) is provided on the lower surface of the fixing plate (31) and is located on the front side of the fixing plate (31); The first pull ring (52) is disposed on the lower surface of the upper flap (32) and located on the rear side of the upper flap (32); And / or, The second fixing structure (60) includes: The second hook (61) is provided on the side of the upper flap (32) and located on the rear side of the upper flap (32); The second pull ring (62) is provided on the side of the fixing plate (31) and located on the front side of the fixing plate (31).

9. The cab structure according to claim 3 or 4, characterized in that, The fixing plate (31) includes a U-shaped first support tube (311) and a first plate body (312) disposed inside the first support tube (311). The upper flip plate (32) includes a U-shaped second support tube (321) and a second plate body (322) disposed inside the second support tube (321). The openings of the first support tube (311) and the second support tube (321) are arranged opposite to each other. A buffer pad (70) is provided at the end of the first support tube (311) and / or the end of the second support tube (321). And / or, A first gas strut (80) is provided between the upper column (22) and the cab frame (10); and / or, a second gas strut (90) is provided between the upper column (22) and the upper flap (32).

10. An engineering machinery, characterized in that, Includes the cab structure as described in any one of claims 1 to 9.

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