Movable stair for loaders and method of use

Abstract

The present application belongs to the technical field of loaders, and particularly relates to a movable staircase for a loader and a use method. The movable staircase for the loader comprises a staircase passage assembly and a fixed support assembly arranged on a loader frame. The staircase passage assembly comprises a staircase passage, and the fixed support assembly comprises an inclined support. The staircase passage is arranged on the inclined support, and the staircase passage can move along the left-right direction of the inclined support when the staircase passage and the inclined support are not locked and fixed. In a first working condition, the left side of the staircase passage is locked and fixed with the left side of the inclined support. In a second working condition, the right side of the staircase passage is locked and fixed with the right side of the inclined support. The movable staircase improves the maintenance efficiency and reduces the maintenance cost, and the staircase itself still has a passing function during maintenance.

Description

Technical Field

[0001] This invention belongs to the field of loader technology, specifically relating to a movable staircase for loaders and its usage method. Background Technology

[0002] As construction machinery develops towards larger and more complex designs, the distance between the driver's cab and components requiring maintenance (such as air filters) and the ground is increasing. Simultaneously, to monitor all systems of the machine and achieve precise control, various devices and sensors are installed. Technicians design different staircases and access routes to help drivers enter and exit the cab and to assist maintenance personnel in reaching the various maintenance windows provided on the machine.

[0003] When maintenance windows are close to stairs and passageways, existing engineering machinery designs typically provide maintenance space for personnel in two ways: The first is to adjust the positions of stairs, passageways, and maintenance windows; the second is to design removable stairs and passageways, removing those that occupy maintenance space to provide more room for maintenance. The first method usually results in more numerous and dispersed maintenance windows, smaller windows, increased workload, and more complex machine hood and platform designs. While the second method concentrates maintenance windows, it requires the removal of some passageways or stairs during maintenance, increasing preparation time and preventing loader operators from entering or exiting the cab during maintenance. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a movable staircase for loaders and a method of using it. The movable staircase improves maintenance efficiency and reduces maintenance costs, while maintaining the staircase's function of passage during maintenance.

[0005] The present invention is achieved through the following technical solution: a movable staircase for a loader, comprising a staircase passage assembly and a fixed bracket assembly mounted on the loader frame;

[0006] The staircase assembly includes a staircase, the fixed bracket assembly includes an inclined bracket, the staircase is mounted on the inclined bracket, and the staircase can move along the left and right directions of the inclined bracket when the staircase and the inclined bracket are not locked and fixed.

[0007] In the first working condition, the left side of the stair passage is locked and fixed to the left side of the inclined bracket;

[0008] In the second working condition, the right side of the stair passage is locked and fixed to the right side of the inclined bracket.

[0009] In some embodiments, the inclined support is provided with a plurality of guide sleeves, the stair passage is provided with corresponding assembly holes, and the stair passage is connected to the guide sleeves of the inclined support by a pin.

[0010] In some embodiments, the guide sleeve includes a long bushing and a short bushing. The long bushing is fixed on the inclined bracket, and a short bushing is fitted inside the openings on both sides of the long bushing. The short bushing and the long bushing are assembled with an interference fit.

[0011] In some embodiments, after the pin and guide sleeve are assembled, the pin is fixed to the side plate of the stair passage by a fastener assembly.

[0012] In some embodiments, the stairwell is provided with a guardrail on at least one side.

[0013] In some embodiments, the fixed bracket assembly further includes a platform bracket, one side of which is fixed to the loader frame and the other side of which is fixed to the inclined bracket.

[0014] In some embodiments, the platform support is further provided with a horizontal support for supporting the stair passage on the side near the inclined support.

[0015] The present invention also provides a method of using the above-mentioned movable staircase for a loader, wherein when the loader is not in maintenance mode, the side of the staircase passage away from the maintenance window and the side of the inclined bracket away from the maintenance window are fastened by a locking device.

[0016] When the loader stops and needs maintenance, loosen the locking device connected to the side of the stair passage away from the maintenance window, and pull or push the stair passage to move it horizontally relative to the inclined support until the side of the stair passage near the maintenance window is in contact with the side of the inclined support near the maintenance window. Then, use the locking device on the side of the stair passage near the maintenance window to secure the stair passage to the inclined support.

[0017] The beneficial effects of this invention are: 1. This invention provides more maintenance space through a movable staircase structure; maintenance windows can be arranged more centrally in the maintenance space, and the maintenance windows can be enlarged, allowing maintenance personnel to access more locations and more components for direct maintenance, thereby improving maintenance efficiency.

[0018] 2. Reduced maintenance preparation time: In the past, loaders needed to dismantle stairs, passageways, etc. for maintenance. With the movable stairs of this invention, maintenance can be carried out directly by pulling up the stairs, saving the time spent on dismantling and other maintenance preparation work.

[0019] 3. Reduced maintenance costs, saving labor costs for dismantling and installing stairs, saving on hoisting equipment costs, and eliminating potential dangers that may occur during hoisting.

[0020] 4. During maintenance, loader operators can still enter and exit the cab normally through the stairwell, which facilitates maintenance personnel to cooperate with operators in repairing the entire vehicle. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the movable staircase of the present invention when the loader is not in maintenance mode;

[0022] Figure 2 for Figure 1 The corresponding top view;

[0023] Figure 3 This is a three-dimensional schematic diagram of the movable staircase of the present invention when the loader is stopped and needs maintenance;

[0024] Figure 4 for Figure 3 The corresponding top view;

[0025] Figure 5 This is a perspective view of the stairwell assembly of the present invention;

[0026] Figure 6 This is a perspective view of the stairwell assembly from a downward angle, according to the present invention.

[0027] Figure 7 This is a perspective view of the fixed bracket assembly of the present invention;

[0028] Figure 8 This is an exploded view of the stairwell assembly and the fixed bracket assembly of the present invention.

[0029] Figure 9 for Figure 1 A cross-sectional view of the central staircase passage assembly and the fixed support assembly in the unopened state;

[0030] Figure 10 for Figure 3 A cross-sectional view of the central staircase passage assembly and the fixed support assembly in the extended state;

[0031] In the diagram, 1. Staircase assembly, 101. Staircase, 102. Pin, 103. Fastener assembly, 104. Guardrail, 2. Fixed bracket assembly, 201. Inclined bracket, 202. Long bushing, 203. Short bushing, 204. Platform bracket, 205. Horizontal support, 3. Locking device, 4. Maintenance window. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] like Figures 1 to 10 As shown, a movable staircase for a loader includes a staircase assembly 1 and a fixed support assembly 2 mounted on the loader frame.

[0034] like Figure 5 , Figure 6 , Figures 8 to 10 As shown, the staircase assembly 1 includes a staircase 101 and a pin 102. The staircase 101 has pre-drilled mounting holes for assembling with the pin 102. The staircase 101 includes a centrally located staircase with a gradually increasing height and side panels on both sides of the staircase. The side panels extend downwards from the top of the staircase, and the free ends of the side panels feature right-angle bends facing inwards. The staircase 101 is made of metal, but can also be made of other materials that meet load-bearing requirements, and is protected against rust such as by painting. The pin 102 is made of a metal alloy and undergoes necessary surface processing to achieve certain tolerances, surface roughness, and surface hardness requirements. A fastener assembly 103 is also provided for fixing the pin 102 to the staircase 101; the fastener assembly 103 uses standard parts.

[0035] like Figures 7 to 10 As shown, the fixed bracket assembly 2 includes an inclined bracket 201 and a guide sleeve; the inclined bracket 201 includes two parallel inclined legs, which are fixed together by a connector; a connecting plate is provided at the lower part of the inclined bracket 201, and both inclined legs are fixed to the connecting plate and to the loader frame through the connecting plate; the upper part of the inclined bracket 201 can be fixed to the loader frame by welding. A guide sleeve is disposed between the two inclined legs of the inclined support 201. Specifically, the guide sleeve includes a long bushing 202 and a short bushing 203. The long bushing 202 is fixed to the inclined support 201, and a short bushing 203 is fitted inside the openings on both sides of the long bushing 202. The inner wall of the long bushing 202 and the outer wall of the short bushing 203 are subjected to necessary surface processing. The short bushing 203 and the long bushing 202 are combined with an interference fit to form the guide sleeve. The performance of the short bushing 203 is superior to that of the long bushing 202. This design can reduce the cost of the guide sleeve. The upper and lower sides of the inclined support 201 are fixed to the loader frame. The inclined support 201 is mainly made of metal and has anti-rust protection measures such as painting. The inclined support 201 and the long bushing 202 can be fixed together by welding or fasteners.

[0036] The guide sleeve formed by the long bushing 202 and the short bushing 203 has a grease hole, which allows grease to be added to lubricate the gap between the guide sleeve and the pin 102. After lubrication, maintenance personnel can achieve the desired result with a small pulling or pushing force. Figure 9 and Figure 10 The transition between the states shown. The lubrication method between the guide sleeve and the pin 102 is not limited to the methods described above. Those skilled in the art will also typically use self-lubricating materials instead of the guide sleeve formed by the long bushing 202 and the short bushing 203, or use other different pin structures to meet the support function.

[0037] Combination Figure 8 As shown, the stair passage assembly 1 and the fixed bracket assembly 2 can be assembled using the following steps. The fixed bracket assembly 2 is fixed to the loader frame. The stair passage 101 has an assembly hole corresponding to the pin 102. Align this assembly hole with the guide sleeve formed by the long bushing 202 and the short bushing 203. Pass the pin 102 through the stair passage 101 and the guide sleeve. The pin 102 and the stair passage 101 are in a clearance fit relationship. Use the fastener assembly 103 to fasten the pin 102 and the stair passage 101. Depending on different operating conditions, the stair passage assembly 1 and the fixed bracket assembly 2 can be fastened in the following ways:

[0038] In the first working condition, the left side of the stair passage 101 is locked and fixed to the left side of the inclined bracket 201;

[0039] In the second working condition, the right side of the stair passage 101 is locked and fixed to the right side of the inclined bracket 201.

[0040] Combination Figures 1 to 4 as well as Figure 9 , Figure 10 The diagram further illustrates the cooperation between the stair passage assembly 1 and the fixed bracket assembly 2. Taking the maintenance window 4 located on the right side of the stair passage assembly 1 as an example, when the loader is not in maintenance mode, the left side of the stair passage 101 is locked to the left side of the inclined bracket 201, and the stair passage 101 is relatively close to the maintenance window 4, preventing the maintenance window 4 from being fully opened. When the loader stops and needs maintenance, the right side of the stair passage 101 is locked to the right side of the inclined bracket 201, and the stair passage 101 is relatively far away from the maintenance window 4, allowing the maintenance window 4 to be fully opened.

[0041] In some embodiments, the stairwell 101 is provided with a guardrail 104 on at least one side, and the guardrail 104 serves as a safety protection feature.

[0042] In some embodiments, according to actual usage requirements, the fixed support assembly 2 further includes a platform support 204. One side of the platform support 204 is fixed to the loader frame, and the other side of the platform support 204 is fixed to the inclined support 201. Appropriate guardrails can also be installed on the platform support 204 as needed. The platform support 204 also has a horizontal support 205 for supporting the stair passage 101 on the side near the inclined support 201.

[0043] This invention also provides a method of using the aforementioned movable staircase for a loader. (Combined with...) Figure 1 , Figure 2 and Figure 9 As shown, when the loader is not in maintenance mode, the stair passage assembly 1 and the fixed bracket assembly 2 are locked together by a locking device 3, which can be a bolt or other fastener, using the left side of the stair passage 101 and the left side of the inclined bracket 201. At this time, whether the loader is working, stopped, or personnel are passing through the stair passage, the stair passage assembly 1 and the fixed bracket assembly 2 form a stable and reliable system without swaying, while still allowing personnel passage. In this state, it fully meets the functions of a traditional platform system. The maintenance window 4 cannot be fully opened at this time.

[0044] Combination Figure 3 , Figure 4 and Figure 10 As shown, when the loader stops and needs maintenance, the locking device 3 connecting the left side of the stair passage 101 and the left side of the inclined support 201 is released, and the stair passage 101 is pulled or pushed, causing the stair passage 101 to move horizontally relative to the inclined support 201 along the axial direction of the guide sleeve. When the distance is pulled to the maximum, the inclined support leg on the right side of the inclined support 201 limits the stair passage 101, forming... Figure 3 , Figure 4 and Figure 10 In the indicated state, the locking device 3 can be installed between the right side of the stair passage 101 and the right side of the inclined bracket 201, so that the stair passage assembly 1 and the fixed bracket assembly 2 form a stable and reliable system. Figure 3 , Figure 4 and Figure 10 In the state shown, on the one hand, the stair passage 101 still partially meets the function of personnel passage; on the other hand, in the pulled state, due to the space between the stair passage 101 and the maintenance window 4... Figure 1 , Figure 2 The space shown is larger, and maintenance window 4 can be fully opened for maintenance personnel to carry out repairs.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the scope of the technical solution of the present invention.

Claims

1. A method of using a mobile stairway for a loader, characterized by: The loader movable staircase comprises a staircase passage assembly (1) and a fixed support assembly (2) arranged on a loader frame; The staircase passage assembly (1) comprises a staircase passage (101), and the fixed support assembly (2) comprises an inclined support (201), The staircase passage (101) is arranged on the inclined support (201), and the staircase passage (101) can move along the left-right direction of the inclined support (201) when the staircase passage (101) and the inclined support (201) are not locked and fixed. In the first working condition, the left side of the staircase passage (101) is locked and fixed with the left side of the inclined support (201). In the second working condition, the right side of the staircase passage (101) is locked and fixed with the right side of the inclined support (201). When the loader is not in the maintenance state, the side of the staircase passage (101) away from the maintenance window (4) is fastened with the side of the inclined support (201) away from the maintenance window (4) through the locking device (3), and in this state, the staircase passage is relatively close to the maintenance window (4), and the maintenance window (4) cannot be completely opened. When the loader is stopped and needs to be maintained, the locking device (3) connected to the side of the staircase passage (101) away from the maintenance window (4) is loosened, and the staircase passage (101) is pulled or pushed to move horizontally relative to the inclined support (201) until the side of the staircase passage (101) close to the maintenance window (4) is attached to the side of the inclined support (201) close to the maintenance window (4), and the staircase passage (101) is fastened with the inclined support (201) through the locking device (3) on the side of the staircase passage (101) close to the maintenance window (4), and in this state, the staircase passage is relatively away from the maintenance window (4), and the maintenance window (4) can be completely opened.

2. The method of use of claim 1, wherein: The inclined support (201) is provided with a plurality of guide sleeves, and the staircase passage (101) is provided with corresponding assembly holes, and the staircase passage (101) is connected to the guide sleeves of the inclined support (201) through a pin shaft (102).

3. The method of use of claim 2, wherein: The guide sleeve comprises a long shaft sleeve (202) and a short shaft sleeve (203), the long shaft sleeve (202) is fixed on the inclined support (201), and the inner sides of the openings on the two sides of the long shaft sleeve (202) are respectively sleeved with a short shaft sleeve (203), and the short shaft sleeve (203) and the long shaft sleeve (202) are assembled through interference fit.

4. The method of use according to claim 2 or 3, wherein: After the pin shaft (102) and the guide sleeve are assembled, the pin shaft (102) is fixed with the side plate of the staircase passage (101) through a fastener combination (103).

5. The method of use of claim 1, wherein: At least one side of the staircase passage (101) is provided with a guardrail (104).

6. The method of use of claim 1, wherein: The fixed support assembly (2) further comprises a platform support (204), one side of the platform support (204) is fixed with the loader frame, and the other side of the platform support (204) is fixed with the inclined support (201).

7. The method of use of claim 6, wherein: The platform support (204) is further provided with a horizontal support (205) for supporting the staircase passage (101) on the side close to the inclined support (201).

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