Auxiliary tool for turning over cab of commercial vehicle

Abstract

The utility model relates to an auxiliary tool for turning over a cab of a commercial vehicle, which comprises a lower layer lifting mechanism, an upper layer lifting mechanism and a lower layer lifting mechanism, the lower layer lifting mechanism comprises a frame bottom plate, trundles for supporting the frame bottom plate are arranged at the bottom of the frame bottom plate, and a scissor lift is connected to the top of the frame bottom plate; the upper-layer turnover mechanism comprises a vertical sliding rail fixed to the top of the scissor lift, a sliding block is connected to the vertical sliding rail in a sliding mode, a crowbar is rotationally connected to the sliding block, and one end of the crowbar is detachably connected with a rocker arm connector; the top of the scissor lift is connected with a linear driving mechanism driving the sliding block to do lifting motion in the length direction of the vertical sliding rail, one end of the linear driving mechanism is connected with the scissor lift, and the other end of the linear driving mechanism is connected with the sliding block. When the linear driving mechanism drives the sliding block to ascend and descend in the length direction of the vertical sliding rail, the crowbar is driven to drive the rocker arm of the cab lifting oil pump to swing, overturning operation of the cab is completed, the labor intensity is reduced, and the operation efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of commercial vehicle cab lifting equipment technology, and in particular to an auxiliary tooling for tilting commercial vehicle cabs. Background Technology

[0002] Currently, the manufacturing and debugging process of commercial vehicles involves the tilting and lifting of the cab. In many models, the lifting cylinder can only be controlled by manually operating the lifting oil pump to push the cab to perform related operations. However, manually operating the lifting oil pump is quite difficult. In order to eliminate the difficult operation and improve the work efficiency, it is necessary to develop and manufacture an auxiliary tooling for the tilting of commercial vehicle cabs to replace manual lifting operations. Summary of the Invention

[0003] This application provides an auxiliary tooling for tilting the cab of a commercial vehicle, in order to solve the problems of difficulty and low efficiency in the related art of manually operating the lifting oil pump to control the lifting oil cylinder to push the cab for related operations.

[0004] This application provides an auxiliary tooling for tilting the cab of a commercial vehicle, including:

[0005] The lower lifting mechanism includes a chassis base plate, the bottom of which is provided with casters to support the chassis base plate, and the top of which is connected to a scissor lift.

[0006] The upper flipping mechanism includes a vertical slide rail fixed to the top of the scissor lift, a slider slidably connected to the vertical slide rail, a pry bar rotatably connected to the slider, and a rocker arm connector detachably connected to one end of the pry bar.

[0007] The top of the scissor lift is connected to a linear drive mechanism that drives the slider to move up and down along the length of the vertical slide rail. One end of the linear drive mechanism is connected to the scissor lift, and the other end is connected to the slider.

[0008] In some embodiments: the vertical slide rails are provided in two parallel and spaced apart, the slider is slidably connected to the two vertical slide rails, the slider is connected to a pry bar rotating support, the pry bar rotating support is provided with a sleeve for clamping the pry bar, and the sleeve is fixedly connected to the pry bar by a set screw.

[0009] In some embodiments, the system further includes a slide rail bracket for vertically fixing the vertical slide rail to the top of the scissor lift. The slide rail bracket includes two parallel and spaced columns, and an upper crossbeam and a lower crossbeam located at both ends of the two columns and connecting the two columns together.

[0010] The vertical slide rails are cylindrical slide rails, and the ends of the two vertical slide rails are respectively fixed to the upper and lower crossbeams. The bottoms of the two columns are fixedly connected to mounting plates, which are fixed to the top of the scissor lift.

[0011] In some embodiments, the linear drive mechanism includes any one of a pneumatic cylinder, a hydraulic cylinder, an electric cylinder, a linear module, a gear and rack mechanism, and a synchronous belt mechanism.

[0012] In some embodiments: the scissor lift includes a first strut and a second strut that intersect to form a first X-shaped structure, and a third strut and a fourth strut that intersect to form a second X-shaped structure;

[0013] The lower ends of the first and second support rods are both connected to the chassis base plate via hinges. The upper end of the first support rod is hinged to the lower end of the fourth support rod via a first hinge shaft, and the upper end of the second support rod is hinged to the lower end of the third support rod via a second hinge shaft.

[0014] The upper ends of the third and fourth support rods are connected to an upper lifting platform via hinges. A drive mechanism is connected between the first and second hinge shafts to drive the first and second hinge shafts to move toward or away from each other.

[0015] In some embodiments: the connection between the second and third struts is hinged to the middle of the fourth strut via a first connecting plate, and the connection between the first and fourth struts is hinged to the middle of the second strut via a second connecting plate. The two ends of the first and second connecting plates are respectively hinged to the fourth strut and the second strut to form a planar four-bar linkage.

[0016] In some embodiments, the drive mechanism includes a lead screw that is threadedly or rotatably connected to the first or second hinge shaft, and one end of the lead screw is connected to a handwheel.

[0017] In some embodiments: the top of the chassis base plate is provided with a lower side panel surrounding it, and the bottom of the scissor lift is provided with an upper side panel surrounding it, the upper side panel being located outside the lower side panel and partially overlapping each other in the height direction.

[0018] In some embodiments: the top of the scissor lift is provided with an upper cover covering the upper flipping mechanism, the upper cover having a vertical clearance groove for the pry bar to extend out, and the upper cover also having a control button for controlling the lifting and lowering movement of the linear drive mechanism.

[0019] In some embodiments: the caster includes two fixed casters and two swivel casters, both of which are equipped with brakes, and the brakes of the two swivel casters are connected to brake drive handles.

[0020] The beneficial effects of the technical solution provided in this application include:

[0021] This application provides an auxiliary tooling for tilting the cab of a commercial vehicle. The auxiliary tooling includes a lower lifting mechanism comprising a chassis base plate with casters supporting it at the bottom and a scissor lift connected to the top. An upper tilting mechanism includes a vertical slide rail fixed to the top of the scissor lift, a slider slidably connected to the vertical slide rail, and a pry bar rotatably connected to the slider. One end of the pry bar is detachably connected to a rocker arm connector. A linear drive mechanism is connected to the top of the scissor lift, driving the slider to move up and down along the length of the vertical slide rail. One end of the linear drive mechanism is connected to the scissor lift, and the other end is connected to the slider.

[0022] Therefore, the upper tilting mechanism of the auxiliary tooling for commercial vehicle cab tilting in this application is located on top of the lower lifting mechanism. The scissor lift of the lower lifting mechanism is used to lift the upper tilting mechanism to a set height, thereby enabling the upper tilting mechanism to adapt to cab lifting oil pumps of different heights. Casters at the bottom of the chassis base facilitate the movement of the auxiliary tooling to a set position and back and forth between set positions. The vertical slide rail of the upper tilting mechanism is fixed to the top of the scissor lift. A slider is slidably connected to the vertical slide rail, and a pry bar is rotatably connected to the slider. One end of the pry bar is provided with a rocker arm connector that connects to the rocker arm of the cab lifting oil pump. When the linear drive mechanism drives the slider to move up and down along the length of the vertical slide rail, it drives the pry bar to drive the rocker arm of the cab lifting oil pump to swing, completing the cab tilting operation. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural view of an embodiment of this application;

[0025] Figure 2 This is a structural front view of an embodiment of this application;

[0026] Figure 3 This is a schematic diagram of the upper flipping mechanism in an embodiment of this application;

[0027] Figure 4 This is a schematic diagram of the lower-level lifting mechanism in an embodiment of this application.

[0028] Figure label:

[0029] 10. Lower lifting mechanism; 11. Chassis base plate; 12. Fixed casters; 13. Swivel casters; 14. Brake drive handle; 15. Scissor lift; 16. Upper lifting platform; 17. Lower side panel; 18. Upper side panel; 19. Top cover;

[0030] 20. Upper flipping mechanism; 21. Vertical slide rail; 22. Slider; 23. Crowbar; 24. Rocker arm joint; 25. Linear drive mechanism; 26. Crowbar rotating support; 27. Sleeve; 28. Slide rail bracket; 29. ​​Mounting plate;

[0031] 151. First strut; 152. Second strut; 153. Third strut; 154. Fourth strut; 155. Hinge seat; 156. First connecting plate; 157. Second connecting plate; 158. Lead screw; 159. Handwheel; 160. First hinge pin; 161. Second hinge pin. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] This application provides an auxiliary tooling for tilting the cab of a commercial vehicle, which can solve the problems of difficulty and low efficiency in the related art of manually operating the lifting oil pump to control the lifting oil cylinder to push the cab to perform related operations.

[0034] See Figures 1 to 4 As shown in the figure, this application embodiment provides an auxiliary tooling for tilting the cab of a commercial vehicle, including:

[0035] The lower lifting mechanism 10 includes a frame base plate 11, with casters supporting the frame base plate 11 at the bottom and a scissor lift 15 connected to the top of the frame base plate 11.

[0036] The upper tilting mechanism 20 includes a vertical slide rail 21 fixed to the top of the scissor lift 15, a slider 22 slidably connected to the vertical slide rail 21, a pry bar 23 rotatably connected to the slider 22, and a rocker arm joint 24 detachably connected to one end of the pry bar 23.

[0037] A linear drive mechanism 25 is connected to the scissor lift 15 to drive the slider 22 to move up and down along the length of the vertical slide rail 21. One end of the linear drive mechanism 25 is connected to the scissor lift 15, and the other end is connected to the slider 22.

[0038] In this embodiment of the application, the upper tilting mechanism 20 of the auxiliary tooling for tilting the cab of a commercial vehicle is located on top of the lower lifting mechanism 10. The scissor lift 15 of the lower lifting mechanism 10 is used to lift the upper tilting mechanism 20 to a set height, so that the upper tilting mechanism 20 can be adapted to cab lifting oil pumps of different heights.

[0039] The casters at the bottom of the chassis base plate 11 facilitate the movement of auxiliary tools to the set work positions and facilitate movement back and forth between the set work positions. The vertical slide rail 21 of the upper tilting mechanism 20 is fixed to the top of the scissor lift 15. A slider 22 is slidably connected to the vertical slide rail 21, and a pry bar 23 is rotatably connected to the slider 22. One end of the pry bar 23 is provided with a rocker arm connector 24 that connects to the rocker arm of the lifting oil pump in the cab.

[0040] In use, the rocker arm connector 24 at one end of the pry bar 23 is fixedly connected to the rocker arm of the cab lifting oil pump. When the linear drive mechanism 25 drives the slider 22 to move up and down along the length of the vertical slide rail 21, it drives the pry bar 23 to drive the rocker arm of the cab lifting oil pump to swing, thus completing the cab tilting operation.

[0041] In some alternative embodiments: see Figure 3 As shown in the figure, this application embodiment provides an auxiliary tooling for tilting the cab of a commercial vehicle. The auxiliary tooling has two vertical slide rails 21 that are parallel to each other and spaced apart. A slider 22 is slidably connected to the two vertical slide rails 21. A pry bar rotating support 26 is connected to the slider 22. The pry bar rotating support 26 is provided with a sleeve 27 for clamping the pry bar 23. The sleeve 27 is fixedly connected to the pry bar 23 by a set screw.

[0042] The upper tilting mechanism 20 also includes a slide rail bracket 28 that vertically fixes the vertical slide rail 21 to the top of the scissor lift 15. The slide rail bracket 28 includes two parallel and spaced columns, as well as an upper crossbeam and a lower crossbeam located at both ends of the two columns and connecting the two columns into one.

[0043] The vertical slide rail 21 is preferably, but not limited to, a cylindrical slide rail. The ends of the two vertical slide rails are fixed to the upper and lower crossbeams respectively. The bottom of the two columns is fixedly connected to the mounting plate 29, which is fixed to the top of the scissor lift 15.

[0044] In this embodiment, the slider 22 moves up and down along the length of the two vertical slide rails 21, thereby driving the pry bar rotating support 26 and the sleeve 27 located on the slider 22 to move up and down synchronously. The sleeve 27 is rotatably connected to the pry bar rotating support 26, and the pry bar 23 located in the sleeve 27 moves up and down with the rocker arm connected to the cab lifting oil pump as the pivot.

[0045] The linear drive mechanism 25 includes any one of a pneumatic cylinder, a hydraulic cylinder, an electric cylinder, a linear module, a gear and rack mechanism, and a synchronous belt mechanism. The linear drive mechanism 25 is further preferably a pneumatic cylinder. The cylinder body is fixed on the mounting plate 29, and the telescopic rod of the cylinder is fixedly connected to the slider 22. The cylinder drives the slider 22 to slide back and forth on the vertical slide rail 21 through telescopic movement.

[0046] In some alternative embodiments: see Figure 4 As shown, this application embodiment provides an auxiliary tooling for tilting the cab of a commercial vehicle. The scissor lift 15 of the auxiliary tooling includes a first support rod 151 and a second support rod 152 that intersect to form a first X-shaped structure, and a third support rod 153 and a fourth support rod 154 that intersect to form a second X-shaped structure.

[0047] The lower ends of the first support rod 151 and the second support rod 152 are both connected to the chassis base plate 11 through the hinge seat 155. The upper end of the first support rod 151 is hinged to the lower end of the fourth support rod 154 through the first hinge shaft 160. The upper end of the second support rod 152 is hinged to the lower end of the third support rod 153 through the second hinge shaft 161.

[0048] The upper ends of the third support rod 153 and the fourth support rod 154 are connected to the upper lifting platform 16 via hinge seats 155. A drive mechanism is connected between the first hinge shaft 160 and the second hinge shaft 161 to drive the first hinge shaft 160 and the second hinge shaft 161 to move towards or away from each other. The drive mechanism includes a lead screw 158 that is threadedly or rotatably connected to the first hinge shaft 160 or the second hinge shaft 161, and a handwheel 159 is connected to one end of the lead screw 158.

[0049] The connection points of the second strut 152 and the third strut 153 are hinged to the middle of the fourth strut 154 via the first connecting plate 156. The connection points of the first strut 151 and the fourth strut 154 are hinged to the middle of the second strut 152 via the second connecting plate 157. The two ends of the first connecting plate 156 and the second connecting plate 157 are respectively hinged to the fourth strut 154 and the second strut 152 to form a planar four-bar linkage.

[0050] When the two ends of the first connecting plate 156 and the second connecting plate 157 are respectively hinged to the fourth support rod 154 and the second support rod 152 to form a planar four-bar linkage, the drive mechanism drives the first hinge shaft 160 and the second hinge shaft 161 to move in a direction that approaches or moves away from each other to achieve lifting motion, so that the scissor lift 15 can be maintained and stabilized at the set height.

[0051] In some alternative embodiments: see Figure 1 and Figure 2 As shown, this application embodiment provides an auxiliary tooling for flipping the cab of a commercial vehicle. The top of the frame base plate 11 of the auxiliary tooling is provided with a lower side panel 17 surrounding it, and the bottom of the scissor lift 15 is provided with an upper side panel 18 surrounding it. The upper side panel 18 is located outside the lower side panel 17 and partially overlaps with it in the height direction.

[0052] The upper side panel 18 and the lower side panel 17 together form a cavity to accommodate the scissor lift 15, which allows the scissor lift 15 to be in a closed space, so that it will not be affected by the external environment when the scissor lift 15 moves up and down, thus improving the reliability of the operation.

[0053] The scissor lift 15 has a top cover 19 that covers the upper tilting mechanism 20. The top cover 19 has a vertical clearance groove for the extension of the pry bar 23, and also has a control button for controlling the lifting and lowering movement of the linear drive mechanism 25. Except for the pry bar 23, the upper tilting mechanism 20 is enclosed in the cavity of the top cover 19, thus preventing interference from the external environment during the lifting and lowering and tilting movements of the upper tilting mechanism 20, and improving the reliability of operation.

[0054] See Figure 4 As shown, the caster includes two fixed casters 12 and two swivel casters 13. Both swivel casters 13 are equipped with brakes. The brakes of the two swivel casters 13 are connected to brake drive handles 14, which are used to unlock or lock the swivel casters 13.

[0055] Working principle

[0056] This application provides an auxiliary tooling for tilting the cab of a commercial vehicle. The auxiliary tooling includes a lower lifting mechanism 10, which comprises a chassis base plate 11 with casters supporting it at the bottom and a scissor lift 15 connected to the top. An upper tilting mechanism 20 includes a vertical slide rail 21 fixed to the top of the scissor lift 15, a slider 22 slidably connected to the vertical slide rail 21, and a pry bar 23 rotatably connected to the slider 22. One end of the pry bar 23 is detachably connected to a rocker arm connector 24. A linear drive mechanism 25 is connected to the top of the scissor lift 15, driving the slider 22 to move vertically along the length of the vertical slide rail 21. One end of the linear drive mechanism 25 is connected to the scissor lift 15, and the other end is connected to the slider 22.

[0057] Therefore, the upper tilting mechanism 20 of the auxiliary tooling for tilting commercial vehicle cabs in this application is located on top of the lower lifting mechanism 10. The scissor lift 15 of the lower lifting mechanism 10 is used to lift the upper tilting mechanism 20 to a set height, thereby enabling the upper tilting mechanism 20 to adapt to cab lifting oil pumps of different heights. The casters at the bottom of the chassis base plate 11 facilitate the movement of the auxiliary tooling to a set position and facilitate movement back and forth between set positions. The vertical slide rail 21 of the upper tilting mechanism 20 is fixed to the top of the scissor lift 15. A slider 22 is slidably connected to the vertical slide rail 21, and a pry bar 23 is rotatably connected to the slider 22. One end of the pry bar 23 is provided with a rocker arm connector 24 that is connected to the rocker arm of the cab lifting oil pump. When the linear drive mechanism 25 drives the slider 22 to move up and down along the length of the vertical slide rail 21, it drives the pry bar 23 to drive the rocker arm of the cab lifting oil pump to swing, completing the cab tilting operation.

[0058] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" 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; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0059] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0060] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An auxiliary tool for cab roll over of a commercial vehicle, characterized in that, include: The lower lifting mechanism (10) includes a frame base plate (11), the bottom of which is provided with casters to support the frame base plate (11), and the top of which is connected to a scissor lift (15). The upper flipping mechanism (20) includes a vertical slide rail (21) fixed to the top of the scissor lift (15), a slider (22) is slidably connected on the vertical slide rail (21), a pry bar (23) is rotatably connected on the slider (22), and a rocker arm joint (24) is detachably connected to one end of the pry bar (23). The top of the scissor lift (15) is connected to a linear drive mechanism (25) that drives the slider (22) to move up and down along the length of the vertical slide rail (21). One end of the linear drive mechanism (25) is connected to the scissor lift (15), and the other end is connected to the slider (22).

2. The auxiliary tooling for tilting the cab of a commercial vehicle as described in claim 1, characterized in that: The vertical slide rail (21) has two parallel and spaced-apart rails. The slider (22) is slidably connected to the two vertical slide rails (21). A pry bar rotating support (26) is connected to the slider (22). A sleeve (27) for clamping the pry bar (23) is provided on the pry bar rotating support (26). The sleeve (27) is fixedly connected to the pry bar (23) by a set screw.

3. The auxiliary tooling for tilting the cab of a commercial vehicle as described in claim 2, characterized in that: It also includes a slide rail bracket (28) that vertically fixes the vertical slide rail (21) to the top of the scissor lift (15). The slide rail bracket (28) includes two parallel and spaced columns, and an upper crossbeam and a lower crossbeam located at both ends of the two columns and connecting the two columns into one. The vertical slide rail (21) is a cylindrical slide rail. The ends of the two vertical slide rails (21) are fixed on the upper and lower crossbeams respectively. The bottom of the two columns is fixedly connected to the mounting plate (29), which is fixed to the top of the scissor lift (15).

4. The auxiliary tooling for tilting the cab of a commercial vehicle as described in claim 1, characterized in that: The linear drive mechanism (25) can be any one of a cylinder, hydraulic cylinder, electric cylinder, linear module, gear and rack mechanism, or synchronous belt mechanism.

5. The auxiliary tooling for tilting the cab of a commercial vehicle as described in claim 1, characterized in that: The scissor lift (15) includes a first support rod (151) and a second support rod (152) that intersect to form a first X-shaped structure, and a third support rod (153) and a fourth support rod (154) that intersect to form a second X-shaped structure. The lower ends of the first support rod (151) and the second support rod (152) are both connected to the chassis base plate (11) through hinges (155). The upper end of the first support rod (151) is hinged to the lower end of the fourth support rod (154) through a first hinge pin (160). The upper end of the second support rod (152) is hinged to the lower end of the third support rod (153) through a second hinge pin (161). The upper ends of the third support rod (153) and the fourth support rod (154) are connected to an upper lifting platform (16) via a hinge seat (155). A drive mechanism is connected between the first hinge shaft (160) and the second hinge shaft (161) to drive the first hinge shaft (160) and the second hinge shaft (161) to move in a direction that approaches or moves away from each other.

6. The auxiliary tooling for tilting a commercial vehicle cab as described in claim 5, characterized in that: The connection between the second support rod (152) and the third support rod (153) is hinged to the middle of the fourth support rod (154) via a first connecting plate (156). The connection between the first support rod (151) and the fourth support rod (154) is hinged to the middle of the second support rod (152) via a second connecting plate (157). The two ends of the first connecting plate (156) and the second connecting plate (157) are respectively hinged to the fourth support rod (154) and the second support rod (152) to form a planar four-bar linkage.

7. The auxiliary tooling for tilting a commercial vehicle cab as described in claim 5, characterized in that: The drive mechanism includes a lead screw (158) that is threadedly or rotatably connected to the first hinge shaft (160) or the second hinge shaft (161), and a handwheel (159) is connected to one end of the lead screw (158).

8. The auxiliary tooling for tilting the cab of a commercial vehicle as described in claim 1, characterized in that: The top of the chassis base plate (11) is provided with a lower side panel (17) surrounding it, and the bottom of the scissor lift (15) is provided with an upper side panel (18) surrounding it. The upper side panel (18) is located outside the lower side panel (17) and partially overlaps with it in the height direction.

9. The auxiliary tooling for tilting a commercial vehicle cab as described in claim 1, characterized in that: The top of the scissor lift (15) is provided with an upper cover (19) covering the upper flipping mechanism (20). The upper cover (19) has a vertical clearance groove for extending the pry bar (23). The upper cover (19) is also provided with a control button for controlling the lifting and lowering movement of the linear drive mechanism (25).

10. The auxiliary tooling for tilting a commercial vehicle cab as described in claim 1, characterized in that: The casters include two fixed casters (12) and two swivel casters (13). Both swivel casters (13) are equipped with brakes, and the brakes of the two swivel casters (13) are connected to brake drive handles (14).

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