Dual person sliding cab for construction machinery

Abstract

The application discloses a double-person sliding cab for engineering machinery in the technical field of engineering machinery, which comprises a double-person cab and a cab sliding rail fixedly connected with the double-person cab; the cab sliding rail comprises a fixed sliding rail fixedly connected with an engineering machinery chassis, an extension sliding rail in sliding connection with the fixed sliding rail, a sliding oil cylinder for driving the extension sliding rail, a mechanical locking pin integrated on the fixed sliding rail, a mechanical locking nut acting on the mechanical locking pin to realize fixation of the fixed sliding rail and the extension sliding rail, and a connecting piece for connecting the extension sliding rail and a main body of the double-person cab; and the extension sliding rail is fixedly connected with the double-person cab. The application can improve the ROPS performance of the cab.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, and in particular to a two-person skid-steer cab for engineering machinery. Background Technology

[0002] When construction machinery, such as walking excavators, reaches extreme terrains inaccessible to wheeled or tracked machinery, such as steep slopes, cliffs, swamps, rock piles, ruins, and woodlands, the cab must provide a stable, safe, and operable environment for the operator under conditions of severe bumps, tilting, or even lateral tilting—that is, operating at or near the design limit angle. It must possess high-level ROPS (Roll-Over-Protective-Structure) and FOPS (Falling-Object-Protective-Structure) performance to ensure the operator's safety and continuous working ability in harsh environments. However, the single-person tilting cabs used in existing technology, with their cab bottom frame hinged to the front end of the slewing platform, frequently bear torsional loads during operation in complex terrain. Prolonged use can easily lead to metal fatigue at the connection points, eventually causing cracking. Furthermore, the limited space within the cab results in poor functional expandability. This structure is difficult to meet the high-level protection performance of the cab of a large-tonnage walking excavator. Although the articulated structure enables the cab to tilt, it sacrifices the cab connection strength. Construction machinery is generally used on unpaved roads and needs to withstand loads in any direction during operation. The articulated connection will be subjected to torsional loads under lateral forces on the cab, resulting in large cab sway and reduced connection strength. At the same time, it cannot meet the ROPS performance requirements.

[0003] In summary, the performance of existing cab ROPS systems is limited, and how to improve ROPS performance has become an urgent technical problem to be solved. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a two-person skid-steer cab for engineering machinery that can improve the ROPS performance of the cab.

[0005] To achieve the above objectives, the present invention is implemented using the following technical solution: In a first aspect, the present invention provides a two-person skid-steer cab for engineering machinery, comprising: A two-person driver's cab and a cab slide rail fixedly connected to the two-person driver's cab; The cab slide rail includes: Fixed slide rail fixedly connected to the chassis of the construction machinery, telescopic slide rail slidably connected to the fixed slide rail, sliding cylinder for driving the telescopic slide rail, mechanical locking pin integrated on the fixed slide rail, mechanical locking nut acting on the mechanical locking pin to fix the fixed slide rail and the telescopic slide rail, and connecting piece for connecting the telescopic slide rail and the main body of the double cab. The telescopic slide rail is fixedly connected to the two-person driver's cab.

[0006] Furthermore, the connector includes: The ROPS bolt extends from one end of the telescopic slide rail into the two-person cab, a first ROPS sleeve is fitted onto the threaded rod of the ROPS bolt, a second ROPS sleeve is fitted onto the threaded rod of the ROPS bolt, and a nut is used to cooperate with the ROPS bolt to achieve fixation; The second ROPS sleeve fits against the head of the ROPS bolt, and the second ROPS sleeve maintains a gap with the telescopic slide rail.

[0007] Furthermore, the connector also includes: The shock absorber bolts and the silicone oil shock absorbers installed on the outer surface of the telescopic slide rail via the shock absorber bolts, wherein the maximum distance between the silicone oil shock absorbers is less than the maximum distance between the ROPS bolts, are used to reduce bumps during driving and operation.

[0008] Furthermore, the cab slide rail also includes: The mechanical safety shaft integrated at the end of the telescopic slide rail is used to act on the fixed slide rail to limit the displacement of the cab slide rail when the telescopic slide rail, mechanical lock pin, and mechanical lock nut fail.

[0009] Furthermore, the two-person cab includes a cab frame, a top protective layer, and a front protective layer, wherein the top protective layer includes: A styling plate mounted on the double-person cab frame via a first connecting bolt, a metal grid plate hinged to the styling plate via a first hinge, and a cab lifting lug mounted on the styling plate; The metal grid plate includes longitudinal stiffeners and transverse stiffeners, which form an angle of 68.5°.

[0010] Furthermore, the front protection includes: Fixed and flip-up grids, mounted on the two-person cab frame by a second connecting bolt, are used to block large-volume splashes from the front.

[0011] Furthermore, the two-person driver's cab also includes: The driver's seat and the passenger seat are fixed inside the main body of the two-person cab, and the operating handle is integrated in front of the driver's seat.

[0012] Furthermore, the cab frame is equipped with tempered glass escape windows on all sides for emergency escape.

[0013] Furthermore, the two-person cab is a closed structure, and an air conditioning system is installed inside the two-person cab to ensure ventilation and regulate temperature.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: This invention first proposes a two-person skid-steer cab for engineering machinery, including a two-person cab and a cab slide rail fixedly connected to the two-person cab. The cab slide rail further includes a fixed slide rail fixedly connected to the chassis of the engineering machinery, a telescopic slide rail slidably connected to the fixed slide rail, a sliding cylinder for driving the telescopic slide rail, a mechanical locking pin integrated on the fixed slide rail, a mechanical locking nut acting on the mechanical locking pin to fix the fixed slide rail and the telescopic slide rail, and a connecting piece for connecting the telescopic slide rail and the main body of the two-person cab. Test results show that, under the action of the cab slide rail, the skid-steer cab provided in this application... When subjected to external loads such as rollover and impact, the ROPS effect is not significantly improved when the elastic / plastic deformation of the structure is between 0-13cm, and is basically the same as that of conventional structures. When the elastic / plastic deformation is between 13-18cm, the ROPS effect shows a significant upward trend and can play a better protective role. When the elastic / plastic deformation is above 18cm, the yield load that the skid cab provided in this application and the traditional structure can withstand tends to be stable, but the specific threshold of the yield load of the two is different. The difference between the yield loads of the two can reflect the improvement of the ROPS effect, and the specific ROPS effect improvement is more than 25%. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a two-person sliding steer cab for engineering machinery provided in an embodiment of the present invention; Figure 2 This is a structural diagram of a two-person driver's cab; Figure 3 This is a schematic diagram of the top protective netting in state one; Figure 4 This is a schematic diagram of the top protective netting in state two; Figure 5 This is a schematic diagram of the front protective netting in state one; Figure 6 This is a schematic diagram of the front protective netting in state two; Figure 7 This is a schematic diagram of the cab slide rail in state one; Figure 8 This is a schematic diagram of the cab slide rail in state two; Figure 9This is a schematic diagram showing the connection between the driver's cab and the sliding rails; Figure 10 These are line graphs showing the ROPS capacity of the conventional layout and the ROPS capacity of the layout of this invention. Among them, 1. Two-person cab, 101. Driver's seat, 102. Passenger seat, 103. Inspection hole, 104. Driver's air conditioner, 105. Passenger air conditioner, 106. On-board tool rack, 107. Escape window; 2. Top protection, 201. Styling panel, 202. Metal grid panel, 203. First hinge point, 204. Cab lifting lug, 205. First connecting bolt; 3. Front protection, 301. Tilting grid, 30 2. Fixed grid; 303. Second hinge point; 305. Second connecting bolt; 4. Cab slide rail; 401. Telescopic slide rail; 402. Fixed slide rail; 403. Sliding cylinder; 404. ROPS bolt; 405. Silicone oil shock absorber; 406. Mechanical lock pin; 407. Mechanical lock nut; 408. Mechanical safety shaft; 409. Shock absorber bolt; 410. First ROPS sleeve; 411. Second ROPS sleeve. Detailed Implementation

[0016] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments and specific features in the embodiments are detailed descriptions of the technical solution of the present application, rather than limitations thereof. In the absence of conflict, the embodiments and technical features in the embodiments can be combined with each other.

[0017] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, 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. Thus, 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.

[0018] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances. Example 1

[0019] Figure 1 This is a structural schematic diagram of a two-person skid-steer cab for construction machinery according to Embodiment 1 of the present invention. The two-person skid-steer cab for construction machinery includes: A two-person driver's cab 1 and a driver's cab slide rail 4 fixedly connected to the two-person driver's cab 1; The cab slide rail 4 includes: The system includes a fixed slide rail 402 fixedly connected to the chassis of the construction machinery, a telescopic slide rail 401 slidably connected to the fixed slide rail 402, a sliding cylinder 403 for driving the telescopic slide rail 401, a mechanical locking pin 406 integrated on the fixed slide rail 402, a mechanical locking nut 407 acting on the mechanical locking pin 406 to fix the fixed slide rail 402 and the telescopic slide rail 401, and a connecting piece for connecting the telescopic slide rail 401 and the main body of the double-person cab 1. The telescopic slide rail 401 is fixedly connected to the two-person driver's cab 1.

[0020] As the sliding cylinder 403 moves, it can drive the telescopic slide rail 401 to move, thereby allowing the double-person cab 1 to be extended or retracted as a whole. In the driving and working state, the mechanical lock pin 406 is fixed to the fixed slide rail 402 with the mechanical lock nut 407, forming a mechanical and hydraulic double lock structure, which prevents the cab from automatically extending when not under maintenance, thus improving safety.

[0021] The cab slide rail 4 can improve the ROPS effect when the main body of the two-person cab 1 is displaced. The displacement mentioned here refers to the amount of elastic / plastic deformation of the structure when the sliding cab is subjected to external loads such as rollover and impact. Example 2

[0022] Based on Embodiment 1, this embodiment also incorporates the following design: like Figure 7 , Figure 8 and Figure 9 As shown, the connector includes: The ROPS bolt 404 extends from one end of the telescopic slide rail 401 into the double-person cab 1, the first ROPS sleeve 410 is sleeved on the threaded rod of the ROPS bolt 404, the second ROPS sleeve 411 is sleeved on the threaded rod of the ROPS bolt 404, and the nut is used to cooperate with the ROPS bolt 404 to achieve fixation. The second ROPS sleeve 411 fits against the head of the ROPS bolt 404, and a gap is maintained between the second ROPS sleeve 411 and the telescopic slide rail 401. The purpose of the gap is to provide space for the amplitude of the silicone oil shock absorber 405, improve driver comfort, and absorb energy when the cab is subjected to rollover force. Both the first ROPS sleeve 410 and the second ROPS sleeve 411 are hollow cylinders. When the cab is subjected to rollover force, the first ROPS sleeve 410 increases the bending resistance of the ROPS bolt 404, and the second ROPS sleeve 411 increases the bearing area.

[0023] The shock absorber bolt 409 and the silicone oil shock absorber 405 installed on the outer surface of the telescopic slide rail 401 via the shock absorber bolt 409, the maximum distance between the silicone oil shock absorbers 405 is less than the maximum distance between the ROPS bolts, in order to reduce bumps during driving and operation.

[0024] Based on the aforementioned Embodiment 1 and the connecting parts, the ROPS performance of the entire cab is now comparable to that of a conventional cab. Figure 10 As shown, according to the test results, the ROPS effect of the skid steer cab provided in this application is not significantly improved when the elastic / plastic deformation is between 0-13cm, and is basically the same as that of conventional structures. The ROPS effect shows a significant upward trend when the elastic / plastic deformation is between 13-18cm, providing better protection. When the elastic / plastic deformation is above 18cm, the yield load (i.e., the yield load that conventional structures can withstand) is significantly higher. Figure 10 The vertical axis of the two axes tends to be stable, but the specific thresholds of the yield loads of the two axes are different. The difference between the yield loads of the two axes can reflect the improvement of the ROPS effect, and the specific improvement of the ROPS effect is more than 25%.

[0025] Based on the above, the cab slide rail 4 may further include: The mechanical safety shaft 408 integrated at the end of the telescopic slide rail 401 is used to act on the fixed slide rail 402 when the telescopic slide rail 401, the mechanical locking pin 406, and the mechanical locking nut 407 fail, thereby limiting the displacement of the cab slide rail 4. In this embodiment, the fixed slide rail 402 may be provided with a limiting hole corresponding to the mechanical safety shaft 408, and the mechanical safety shaft 408 cooperates with the limiting hole.

[0026] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the two-person cab 1 includes a cab frame (not annotated in the figure), a top protective shield 2, and a front protective shield 3. The top protective shield 2 includes: A decorative panel 201 mounted on the frame of the double-person cab 1 via a first connecting bolt 205, a metal grid panel 202 hinged to the decorative panel 201 via a first hinge, and a cab lifting lug 204 mounted on the decorative panel 201 are also present. Figure 3 The first hinge point 203 that appears in the text is the hinge point of the first hinge member; The metal grid panel 202 includes longitudinal stiffeners and transverse stiffeners at an angle of 68.5°. This structure is lightweight, meeting strength and stiffness requirements while increasing energy absorption by 30%. Upon impact, it absorbs energy through controlled deformation, reducing the impact force transmitted to the cab. The metal grid panel 202 structural design also increases cab brightness and improves the driver's visibility.

[0027] The cab lifting lugs 204 can also be used as lifting points when the cab is disassembled and assembled as a whole, making it convenient for overall disassembly and assembly.

[0028] The top protection 107 escape window 2 is used to resist deformation caused by falling objects from above, maintain the interior space of the driver's cab, and meet the FOPS performance of two people in the front and rear.

[0029] The front protection 3 includes: The fixed grid 302 and the flip grid 301, which are installed on the frame of the two-person cab 1 by the second connecting bolt 305, are used to block large-volume splashes from the front. The flip grid 301 is hinged to the frame of the two-person cab 1. Figure 5 The second hinge point 303 that appears in the diagram is the hinge point between the two. At the same time, in an emergency, the flip-up grid 301 of the front protection 3 can be opened from inside the driver's cab to meet the needs of personnel escape.

[0030] The two-person driver's cab 1 also includes: The driver's seat 101 and the passenger seat 102 are fixed in the frame of the two-person cab 1, and the operating handle is integrated in front of the driver's seat 101. The two-person cab 1 is also provided with an inspection hole 103. Below the inspection hole 103 is the slewing bearing raceway, which allows for maintenance and repair of the key slewing structure without disassembling the machine.

[0031] The driver's seat 101 is bolted to the cab frame and is equipped with a pneumatic shock-absorbing seat, adjustable backrest, and seat belt. Its main function is to allow the driver to operate the machine and provide a relatively comfortable working environment. The co-pilot seat 102 is connected to the cab frame by backrest bolts and is only equipped with a seat belt, which saves the interior space of the cab. Its main function is to allow the co-pilot to observe and assess the surrounding environment, and it can also be used as a training aircraft for teaching purposes with passengers. In addition, a vehicle tool rack 106 can be arranged in the double cab 1 to hold emergency repair tools, fire extinguishers, window breakers, special tool racks, etc. Tempered glass escape windows 107 are arranged around the cab frame for emergency escape. If the window is broken with a window breaker, one can climb out through the escape window 107.

[0032] The double-person cab 1 is an enclosed structure, and an air conditioning system is installed inside the double-person cab 1, specifically including a driver's air conditioner 104 and a passenger's air conditioner 105, to ensure ventilation and regulate temperature and improve comfort.

[0033] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A two-person skid steer cab for engineering machinery, characterized in that, include: A two-person driver's cab (1) and a cab slide rail (4) fixedly connected to the two-person driver's cab (1); The cab slide rail (4) includes: Fixed slide rail (402) fixedly connected to the chassis of the engineering machinery, telescopic slide rail (401) slidably connected to the fixed slide rail (402), sliding cylinder (403) for driving the telescopic slide rail (401), mechanical locking pin (406) integrated on the fixed slide rail (402), mechanical locking nut (407) acting on the mechanical locking pin (406) to fix the fixed slide rail (402) and the telescopic slide rail (401), and connecting piece for connecting the telescopic slide rail (401) and the main body of the double cab (1); The telescopic slide rail (401) is fixedly connected to the double-person cab (1); The connector includes: A ROPS bolt (404) extending from one end of a telescopic slide rail (401) into a double-person cab (1), a first ROPS sleeve (410) fitted onto the threaded rod of the ROPS bolt (404), a second ROPS sleeve (411) fitted onto the threaded rod of the ROPS bolt (404), and a nut for engaging with the ROPS bolt (404) to achieve fixation; The second ROPS sleeve (411) fits against the head of the ROPS bolt (404), and the second ROPS sleeve (411) maintains a distance from the telescopic slide rail (401); When the cab bears the rollover force, the first ROPS sleeve (410) can increase the bending resistance of the ROPS bolt (404), and the second ROPS sleeve (411) can increase the bearing area.

2. The double-person skid-steer cab for engineering machinery according to claim 1, characterized in that, The connector also includes: The shock absorber bolts (409) and the silicone oil shock absorbers (405) installed on the outer surface of the telescopic slide rail (401) via the shock absorber bolts (409) have a maximum distance between them that is less than the maximum distance between the ROPS bolts, which is used to reduce bumps during driving and operation.

3. The double-person skid-steer cab for engineering machinery according to claim 1, characterized in that, The cab slide rail (4) also includes: The mechanical safety shaft (408) integrated at the end of the telescopic slide rail (401) is used to act on the fixed slide rail (402) to limit the displacement of the cab slide rail (4) when the telescopic slide rail (401), mechanical locking pin (406), and mechanical locking nut (407) fail.

4. The double-person skid-steer cab for engineering machinery according to claim 1, characterized in that, The two-person cab (1) includes a cab frame, a top protective layer (2), and a front protective layer (3), wherein the top protective layer (2) includes: A styling plate (201) mounted on the frame of the double cab (1) by a first connecting bolt (205), a metal grid plate (202) hinged to the styling plate (201) by a first hinge, and a cab lug (204) mounted on the styling plate (201). The metal grid plate (202) includes longitudinal stiffeners and transverse stiffeners, which are at an angle of 68.5°.

5. The double-person skid-steer cab for engineering machinery according to claim 4, characterized in that, The front protection (3) includes: Fixed grids (302) and flip grids (301) are mounted on the frame of the two-person cab (1) by second connecting bolts (305) to block large-volume splashes from the front.

6. The double-person skid-steer cab for engineering machinery according to claim 4, characterized in that, The two-person driver's cab (1) also includes: The driver's seat (101) and the passenger seat (102) are fixed inside the main body of the two-person cab (1), and the operating handle is integrated in front of the driver's seat (101).

7. The double-person skid-steer cab for engineering machinery according to claim 4, characterized in that, The cab frame is equipped with tempered glass escape windows (107) on all sides for emergency escape.

8. The double-person skid-steer cab for engineering machinery according to claim 1, characterized in that, The double driver's cab (1) is a closed structure, and an air conditioning system is installed in the double driver's cab (1) to ensure ventilation and regulate temperature.

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