Front structure of a non-load-bearing vehicle body and method of replacing a brake actuator

Abstract

The present invention relates to a front structure of a non-supporting vehicle body and a replacement method of a brake actuator. The front structure of the non-supporting vehicle body according to the present invention includes: a pair of left and right longitudinal members extending in a vehicle front-rear direction; a cross member extending in a vehicle width direction and linking the longitudinal members; a motor for running disposed between the cross member; and a brake actuator disposed on a vehicle rear side with respect to the cross member and on an inner side in the vehicle width direction with respect to the longitudinal members, configured so that, with the motor removed, a worker can approach the brake actuator from a space between the cross member.

Description

TECHNICAL FIELD

[0001] The present application relates to a front structure of a non-load-bearing vehicle body and a method for replacing a brake actuator. BACKGROUND

[0002] Conventionally, a brake actuator that is disposed between a master cylinder and a wheel brake and controls hydraulic pressure supplied to the wheel brake is known (for example, refer to Japanese Patent Application Laid-Open No. 2001-180467). The brake actuator is disposed in an engine compartment and is mounted to a corner portion that joins a rocker panel longitudinal beam and an instrument panel cross beam.

[0003] Here, in a case where the above-described brake actuator is mounted to a non-load-bearing vehicle body, it is desirable that a worker easily performs a replacement work on the brake actuator. SUMMARY

[0004] The present application has been achieved in order to solve the above-described problems, and an object of the present application is to provide a front structure of a non-load-bearing vehicle body and a method for replacing a brake actuator, which can easily replace the brake actuator.

[0005] The front structure of the non-load-bearing vehicle body according to the present application includes: a pair of left and right longitudinal beams that extend in a vehicle front-rear direction; a first cross beam that extends in a vehicle width direction and links the longitudinal beams; and a second cross beam that is disposed on a vehicle rear side with respect to the first cross beam, extends in the vehicle width direction, and links the longitudinal beams. The front structure of the non-load-bearing vehicle body includes: a power source for running that is disposed between the first cross beam and the second cross beam; and a brake actuator that is disposed on the vehicle rear side with respect to the second cross beam and on an inner side in the vehicle width direction with respect to the longitudinal beams, and is configured so that, in a case where the power source is removed, a worker can approach the brake actuator from a space between the first cross beam and the second cross beam.

[0006] With this configuration, after the power source is removed, the worker enters the space between the first cross beam and the second cross beam to approach the brake actuator, and thus the brake actuator can be easily replaced.

[0007] It can also be configured so that, on the basis of the above-described front structure, a mounting portion that mounts the brake actuator using a fastening member, a first support portion that links a rear surface of the second cross beam and supports the mounting portion, and a second support portion that links an inner side surface of the longitudinal beam and supports the mounting portion are provided, and the configuration is such that, in a case where the power source is removed, the worker can approach the fastening member from the space between the first cross beam and the second cross beam.

[0008] Also, in this case, a pipe joint configured to be arranged in a flow path from the master cylinder toward the brake actuator and attached to the second support portion, a first pipe extending from the master cylinder connected to one end portion of the pipe joint, and a second pipe extending from the brake actuator toward the rear side of the vehicle connected to the other end portion of the pipe joint can be provided, and the pipe joint can be configured such that, in the case where the power source is removed, the worker can access the first connection portion of the second pipe and the pipe joint from the space between the first cross member and the second cross member.

[0009] Also, in the above front structure, a third pipe from the brake actuator toward the wheel brake can be provided to extend upward from an upper portion of the brake actuator, and the third pipe and the second connection portion of the brake actuator can be configured such that, in the case where the power source is removed, the worker can access the third pipe from the space between the first cross member and the second cross member.

[0010] Also, in the above front structure, the power source can include a motor, a battery that stores electric power for driving the motor can be arranged on the rear side of the vehicle of the second cross member, and a cooling pipe for cooling the battery can be arranged on the inner side in the vehicle width direction of the brake actuator.

[0011] The brake actuator replacement method according to the present application is a replacement method of a brake actuator provided in a non-structural body. The non-structural body includes a pair of left and right side frames extending in a vehicle longitudinal direction, a first cross member extending in a vehicle width direction and linking the side frames, a second cross member arranged on a rear side of the vehicle with respect to the first cross member, extending in the vehicle width direction, and linking the side frames, a power source for running arranged between the first cross member and the second cross member, and a brake actuator arranged on the rear side of the vehicle with respect to the second cross member and on the inner side in the vehicle width direction with respect to the side frames. The brake actuator replacement method includes a step of removing the power source, a step of a worker entering a space between the first cross member and the second cross member, and a step of the worker accessing the brake actuator from the space between the first cross member and the second cross member.

[0012] With this configuration, after the power source is removed, the worker enters the space between the first cross member and the second cross member to access the brake actuator, so that the brake actuator can be easily replaced.

[0013] According to the front structure of the non-structural body and the brake actuator replacement method according to the present application, the brake actuator can be easily replaced.

[0014] Features, advantages, and technical and industrial significance of exemplary embodiments of the present application will be described below with reference to the accompanying drawings, in which like numerals denote like elements. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1is a schematic plan view that schematically shows an outline of the non- body based on the present embodiment.

[0016] Figure 2 is a perspective view that shows a frame skeleton of the non- body of Figure 1

[0017] Figure 3 is a view that shows a brake actuator mounted to the frame skeleton of Figure 2

[0018] Figure 4 is a view of the brake actuator as viewed from the lower side. Figure 3

[0019] Figure 5 is a view that shows a state in which an operator enters a space between the cross members after the motor is removed from the frame skeleton.

[0020] Figure 6 is a view that shows when a pipe is removed from the brake actuator using a socket wrench, and is a view that shows an example of a visual observation by an operator of Figure 5

[0021] Figure 7 is a view that shows when a pipe is removed from a pipe joint using a socket wrench. DETAILED DESCRIPTION

[0022] Hereinafter, one embodiment of the present application will be described.

[0023] First, with reference to Figure 1 , an outline of the non- body 100 that uses the front structure 50 based on one embodiment of the present application will be described. Further, in Figure 1 and the like, the X1 direction side is the vehicle front side, the X2 direction side is the vehicle rear side, the Y1 direction side is the left side, and the Y2 direction side is the right side.

[0024] The non- body 100 has the frame skeleton 1 and a cab (omitted from the drawing), and loads the cab on the frame skeleton 1. For example, the cab is provided on the frame skeleton 1 as a whole, and an engine hood, a cab tilting mechanism are not provided in the non- body 100. In addition, as shown in Figure 1 , the non- body 100 has a motor 2, a battery 3, a cooling device including a radiator 4, a steering control device including a steering device 5, and a brake device including a brake actuator 6. Further, the motor 2 is an example of the "power source" of the present application.

[0025] ​​​​The motor 2 is provided to output a driving force for running of the vehicle. The battery 3 is capable of charge and discharge, and configured to store electric power for driving the motor 2. The cooling device is provided to cool the motor 2 and the battery 3. The cooling device is configured to circulate a cooling medium between the radiator 4 and the motor 2 and the battery 3 by a pump (omitted from the drawing). The radiator 4 is provided to cool the cooling medium by heat exchange with outside air. The steering device is provided to adjust the steering angles of the left front wheel 7FL and the right front wheel 7FR.

[0026] The brake device includes a master cylinder (omitted from the drawing), wheel brakes (omitted from the drawing) provided to each wheel (the left front wheel 7FL, the right front wheel 7FR, the left rear wheel 7RL, and the right rear wheel 7RR), and a brake actuator 6 provided between the master cylinder and the wheel brakes. The master cylinder is configured to supply hydraulic pressure to the brake actuator 6 at the time of braking. The brake actuator 6 is provided to control the hydraulic pressure supplied to each wheel brake at the time of braking. Each wheel brake is, for example, a disc brake or a drum brake, and is configured to generate a braking force in accordance with the supplied hydraulic pressure.

[0027] The vehicle frame 1 includes the longitudinal members 11L and 11R, and the cross members 12a to 12e. The longitudinal members 11L and 11R are formed to extend in the vehicle front-rear direction (the X1 and X2 directions), and are provided as a pair of left and right members. The longitudinal members 11L and 11R are arranged to face each other in the vehicle width direction (the Y1 and Y2 directions), the longitudinal member 11L is arranged on one side (the left side) in the vehicle width direction, and the longitudinal member 11R is arranged on the other side (the right side) in the vehicle width direction. The cross members 12a to 12e are formed to extend in the vehicle width direction, and are configured to link the longitudinal members 11L and 11R. The cross members 12a to 12e are arranged at intervals in the vehicle front-rear direction. The cross members 12a and 12b are arranged on the vehicle front side, and the cross members 12c to 12e are arranged on the vehicle rear side. Further, the cross members 12a and 12b are examples of the "first cross member" and the "second cross member" of the present application, respectively.

[0028] Here, the front portion structure 50 of the non-load-bearing body 100 is provided with the longitudinal members 11L and 11R, the cross members 12a and 12b, the motor 2, the brake actuator 6, and the like. The cross member 12a is a cross member arranged on the most front side of the vehicle, and the cross member 12b is a cross member arranged on the second cross member from the front side of the vehicle. That is, the cross member 12b is arranged on the rear side of the vehicle with respect to the cross member 12a. In the case of a top view, the motor 2 is arranged between the cross members 12a and 12b.

[0029] In addition, in the case of the plan view, the radiator 4 is disposed at a position closer to the front side of the vehicle than the motor 2. In the case of the plan view, the steering device 5 is disposed at a position closer to the rear side of the vehicle than the motor 2. In the case of the plan view, the battery 3 is provided at a large part of the central portion in the vehicle front-rear direction. Therefore, the battery 3 is disposed at the rear side of the vehicle with respect to the cross member 12b. The cooling pipe 41 (see Figure 6 ) through which a cooling medium as a cooling device is passed is connected to the battery 3. The cooling pipe 41 is provided for cooling the battery 3 and is disposed at the inner side in the vehicle width direction of the brake actuator 6.

[0030] Brake actuator

[0031] Next, the configuration of the brake actuator 6 in the front portion configuration 50 of the present embodiment will be described with reference to Figures 2 to 4

[0032] As shown in Figure 2 , the brake actuator 6 is mounted to the rear surface (the surface of the rear side of the vehicle) of the cross member 12b and the inner side surface of the longitudinal member 11R. Therefore, the brake actuator 6 is disposed at the rear side of the vehicle with respect to the cross member 12b and is disposed at the inner side in the vehicle width direction with respect to the longitudinal member 11R. Therefore, in the case where the motor 2 (see Figure 1 ) is removed, the worker W (see Figure 5 ) can approach the brake actuator 6 from the space between the cross members 12a and 12b.

[0033] As shown in Figure 3 , the bracket 8 is used to mount the brake actuator 6 to the frame skeleton 1. The bracket 8 has a mounting portion 81 to which the brake actuator 6 is mounted, and support portions 82 to 84 that support the mounting portion 81. In addition, the support portions 82 and 83 are examples of the "first support portion" of the present application, and the support portion 84 is an example of the "second support portion" of the present application.

[0034] The mounting portion 81 is formed in a plate shape in a manner that the brake actuator 6 can be placed thereon. In the mounting portion 81, the brake actuator 6 is mounted via a bush by a bolt 811. For example, as shown in Figure 4 , three bolts 811 are used to mount the brake actuator 6 to the mounting portion 81. One of the three bolts 811 is disposed at the bottom surface of the brake actuator 6, and two of the three bolts 811 are disposed near the lower end portion of the rear surface (the surface of the rear side of the vehicle) of the brake actuator 6. In addition, the bolt 811 is an example of the "fastening member" of the present application.

[0035] ​The support portion 82 is disposed on the vehicle-width-direction inner side relative to the support portions 83 and 84. One end portion of the support portion 82 is engaged with the lower surface of the mounting portion 81. The other end portion of the support portion 82 is coupled to the rear surface of the cross member 12b by a bolt 821. The other end portion of the support portion 82 is disposed on the vehicle-width-direction inner side relative to the brake actuator 6.

[0036] The support portion 83 is disposed on the vehicle front side relative to the support portion 84. One end portion of the support portion 83 is engaged with the lower surface of the mounting portion 81. The other end portion of the support portion 83 is coupled to the rear surface of the cross member 12b by a bolt 831. The other end portion of the support portion 83 is disposed on the vehicle-width-direction outer side relative to the brake actuator 6.

[0037] The support portion 84 is formed by assembling the plate members 84a and 84b. One end portion of the support portion 84 is engaged with the lower surface of the mounting portion 81. The other end portion of the support portion 84 is coupled to the inner side surface of the longitudinal member 11R by a bolt 841. The other end portion of the support portion 84 is disposed on the vehicle-width-direction outer side relative to the brake actuator 6, and on the vehicle rear side relative to the other end portions of the support portions 82 and 83.

[0038] The brake actuator 6 includes an actuator main body (omitted from illustration) that controls the hydraulic pressure supplied to each wheel brake, and an ECU (omitted from illustration) that controls the actuator main body. As shown in FIG. 6, a connector 61 for connecting a communication-purpose wiring (omitted from illustration) of the ECU is provided in the brake actuator 6. For example, the actuator main body is connected to two flow paths from the master cylinder, and is connected to four flow paths toward each wheel brake. Figure 3

[0039] The two flow paths from the master cylinder toward the brake actuator 6 are respectively composed of a pipe 91, a pipe joint 92, and a pipe 93. The pipe 91 is formed so as to extend toward the vehicle rear side along the longitudinal member 11R from the master cylinder. The pipe joint 92 is provided in order to connect the pipes 91 and 93. Specifically, the pipe 91 extending from the master cylinder is connected to one end portion of the pipe joint 92, and the pipe 93 extending toward the vehicle rear side from the rear surface of the brake actuator 6 is connected to the other end portion of the pipe joint 92. The two pipe joints 92 are coupled by a coupling plate 921, which is attached to the intermediate portion of the support portion 84 by a bolt 922. That is, the support portion 84 also functions to support the two pipe joints 92. The two pipe joints 92 are disposed on the vehicle rear side of the brake actuator 6, and on the vehicle-width-direction outer side of the brake actuator 6. Further, the pipes 91 and 93 are examples of the "first pipe" and the "second pipe" of the present application, respectively.

[0040] ​Four flow paths from the brake actuator 6 to each wheel brake are formed by pipes 94. Pipes 94 are configured to extend upwards from the upper surface of the brake actuator 6 and towards each wheel brake. The flow path towards the left front wheel 7FL (see reference) Figure 1 The wheel brake piping 94 is configured to extend from the brake actuator 6 along the crossbeam 12b to the left, and then along the longitudinal beam 11L (see reference). Figure 1 Extending forward towards the vehicle. Towards the left rear wheel 7RL (refer to...) Figure 1 The wheel brake piping 94 is configured to extend from the brake actuator 6 along the crossbeam 12b to the left, and then along the longitudinal beam 11L toward the rear of the vehicle. It faces the right front wheel 7FR (see reference). Figure 1 The wheel brake piping 94 is formed to extend from the brake actuator 6 along the longitudinal beam 11R towards the front of the vehicle. It faces the right rear wheel 7RR (see reference). Figure 1 The wheel brake piping 94 is formed to extend from the brake actuator 6 along the longitudinal beam 11R toward the rear of the vehicle. Furthermore, piping 94 is an example of the "third piping" of the present invention.

[0041] Brake actuator replacement method

[0042] Next, refer to Figures 5 to 7 The method for replacing the brake actuator 6 in the front structure 50 of this embodiment will be described. The brake actuator 6 is replaced when the motor 2 and steering device 5 are replaced periodically.

[0043] First, the motor 2 and steering device 5 are removed from the frame 1. This creates a space between crossbeams 12a and 12b that allows the operator W to enter. Furthermore, as... Figure 5 As shown, operator W enters the space between crossbeams 12a and 12b, where the motor 2 and other components are located, from below the frame frame 1. Operator W can access and handle the brake actuator 6, which is mounted on the rear surface of crossbeam 12b and the inner side of longitudinal beam 11R.

[0044] Specifically, the operator W can access and handle the wiring (not shown) connected to the connector 61, the flared nut 94a connecting the conduit 94 to the brake actuator 6, the flared nut 92a connecting the conduit 93 to the conduit fitting 92, and the bolt 811 for mounting the brake actuator 6 to the bracket 8 from the space between the crossbeams 12a and 12b. Furthermore, the flared nuts 92a and 94a are examples of the "first connection portion" and "second connection portion" of the present invention, respectively.

[0045] Here, a cooling pipe 41 is arranged inside the brake actuator 6 in the vehicle width direction, so that... Figure 6As shown, although the operator W's field of vision is partially obstructed, the brake actuator 6 can be visually identified through the gap in the cooling pipe 41. Moreover, the operator W, who enters the space between the crossbeams 12a and 12b, performs the disassembly of the brake actuator 6.

[0046] First, operator W disconnects the wiring from connector 61. Next, operator W uses a flared nut wrench 150 to loosen the four flared nuts 94a sequentially. That is, the four pipes 94 are removed sequentially from the brake actuator 6. Furthermore, Figure 6 The Wh indicates the hand of the operator holding the flared nut wrench 150.

[0047] In addition, such as Figure 7 As shown, the operator W uses a flared nut wrench 150 to sequentially loosen the two flared nuts 92a. That is, the two pipes 93 are removed sequentially from the pipe connector 92. Therefore, in this embodiment, the pipes 93 are removed together with the brake actuator 6. This is because, with the brake actuator 6 mounted on the frame 1, it is difficult to loosen the flared nuts 93a that connect the pipes 93 to the brake actuator 6. That is, it is difficult to ensure sufficient space to swing the flared nut wrench 150 to loosen the flared nuts 93a.

[0048] Furthermore, operator W uses a clamp (not shown) to loosen the three bolts 811 one by one. Next, operator W removes the brake actuator 6 from the bracket 8. Thus, the disassembly operation of the brake actuator 6 is performed.

[0049] Subsequently, operator W, who enters the space between crossbeams 12a and 12b, performs the installation of a new brake actuator (not shown). This installation is performed in the reverse order of the disassembly operation.

[0050] Effect

[0051] In this embodiment, as described above, a motor 2 is installed between crossbeams 12a and 12b, and a brake actuator 6 is installed on the rear surface of crossbeam 12b and the inner side of longitudinal beam 11R. Therefore, after removing the motor 2, the operator W can enter the space between crossbeams 12a and 12b to access and handle the brake actuator 6. This allows for easy replacement of the brake actuator 6 even in a non-load-bearing vehicle body 100 without an engine hood or cab tilting mechanism. Furthermore, since the brake actuator 6 is positioned further rearward than the buffer zone, it is less likely to be damaged in the event of a vehicle collision.

[0052] In addition, in this embodiment, by mounting the bracket 8 to the frame 1 and mounting the brake actuator 6 to the bracket 8 with bolts 811, the brake actuator 6 can be removed from the bracket 8 by releasing the bolts 811.

[0053] In addition, in the present embodiment, by providing the pipe joint 92 in the flow path from the master cylinder toward the brake actuator 6, it is possible to remove the pipe 93 from the pipe joint 92 by releasing the fastening of the flare nut 92a. Therefore, it is possible to remove the brake actuator 6 together with the pipe 93. That is, even if the fastening of the flare nut 93a is not released, it is possible to remove the brake actuator 6.

[0054] In addition, in the present embodiment, the pipe 94 is provided from the brake actuator 6 toward each wheel brake, but by releasing the fastening of the flare nut 94a, it is possible to remove the pipe 94 from the brake actuator 6.

[0055] In addition, in the present embodiment, by arranging the cooling pipe 41 on the inner side in the vehicle width direction of the brake actuator 6, it is possible to visually recognize the brake actuator 6 from the gap of the cooling pipe 41.

[0056] In addition, in the present embodiment, by arranging the pipe 91 along the longitudinal beam 11R and the pipe 94 along the longitudinal beam 11R, the cross beam 12b, and the longitudinal beam 11L, it is possible to achieve simplification of the shape of the pipe, and thus it is possible to achieve reduction of cost.

[0057] Other Embodiments

[0058] Further, all of the points of the embodiments disclosed herein are examples, and are not limiting bases for the explanation. Therefore, the technical scope of the present application is not only explained by the above-described embodiments, but is defined based on the recitations of the claims. In addition, the technical scope of the present application includes all modifications equivalent to the claims and within the scope.

[0059] For example, in the above-described embodiments, the motor 2 is shown as the power source for running, but is not limited thereto, and as the power source for running, an internal combustion engine can be provided together with the motor, or an internal combustion engine can be provided instead of the motor.

[0060] In addition, in the above-described embodiments, an example in which the brake actuator 6 is mounted to the rear surface of the cross beam 12b and the inner side surface of the longitudinal beam 11R is shown, but is not limited thereto, and the brake actuator can be mounted to the rear surface of the cross beam or the inner side surface of the longitudinal beam.

[0061] In addition, in the above-described embodiments, an example in which the pipe joint 92 is provided is shown, but is not limited thereto, and the pipe joint can not be provided as long as a work space for removing the pipe from the brake actuator can be secured.

[0062] In addition, in the above-described embodiment, an example in which the pipe 94 toward the wheel brake is provided so as to extend upward from the upper surface of the brake actuator 6 is shown, but the present application is not limited thereto, and the pipe toward the wheel brake can also be provided so as to extend from a surface other than the upper surface of the brake actuator (for example, a side surface).

[0063] In addition, in the above-described embodiment, an example in which the cooling pipe 41 is arranged on the inner side in the vehicle width direction of the brake actuator 6 is shown, but the present application is not limited thereto, and the cooling pipe can also be arranged on the inner side in the vehicle width direction of the brake actuator.

[0064] In addition, in the above-described embodiment, a transmission that changes the output of the motor 2 and a differential device that distributes the output of the transmission can also be included in the housing of the motor 2.

[0065] In addition, in the above-described embodiment, the order of the dismounting work of the brake actuator 6 is an example, and the present application is not limited to the above-described order.

[0066] The present application can be used for a front structure of a non-supporting vehicle body and a replacement method of a brake actuator.

Claims

1. A front structure for a non-load-bearing vehicle body, comprising: A pair of longitudinal beams extend in the front-to-back direction of the vehicle; The first crossbeam extends in the vehicle width direction and connects the longitudinal beams; and The second crossbeam is positioned relative to the first crossbeam on the rear side of the vehicle, extends in the vehicle width direction, and connects the longitudinal beams. Its features are, The front structure of the non-load-bearing body includes: A power source for driving is disposed between the first crossbeam and the second crossbeam; and The brake actuator is positioned relative to the second crossbeam on the rear side of the vehicle and on the inner side in the vehicle width direction relative to the longitudinal beam. The configuration is such that, with the power source removed, the operator can access and handle the brake actuator from the space between the first crossbeam and the second crossbeam.

2. The front structure according to claim 1, characterized in that, have: The mounting section uses fastening components to mount the brake actuator; The first support portion is connected to the rear surface of the second crossbeam and supports the mounting portion; and The second support portion is connected to the inner side of the longitudinal beam and supports the mounting portion. The configuration is such that, with the power source removed, the operator can access and handle the fastening component from the space between the first crossbeam and the second crossbeam.

3. The front structure according to claim 2, characterized in that, It includes a piping connector configured in the flow path from the master cylinder toward the brake actuator and mounted on the second support portion. A first pipe extending from the master cylinder is connected to one end of the pipe fitting. A second pipe extending from the brake actuator toward the rear of the vehicle is connected to the other end of the pipe fitting. The configuration is such that, with the power source removed, the operator can access and handle the first connection between the second pipe and the pipe fitting from the space between the first crossbeam and the second crossbeam.

4. The front structure according to claim 1, characterized in that, The third conduit from the brake actuator toward the wheel brake is configured to extend upward from the upper part of the brake actuator. The configuration is such that, with the power source removed, the operator can access and handle the third pipe and the second connection of the brake actuator from the space between the first crossbeam and the second crossbeam.

5. The front structure according to any one of claims 1 to 4, characterized in that, The power source includes a motor. A battery storing the electricity that powers the motor is located on the rear side of the second crossbeam. The cooling pipes for cooling the battery are located inside the brake actuator in the vehicle width direction.

6. A method for replacing a brake actuator, specifically a method for replacing a brake actuator installed in a non-load-bearing vehicle body, characterized in that... The non-load-bearing body includes: a pair of left and right longitudinal beams extending in the vehicle's longitudinal direction; a first crossbeam extending in the vehicle's width direction and connecting the longitudinal beams; a second crossbeam disposed relative to the first crossbeam on the rear side of the vehicle, extending in the vehicle's width direction and connecting the longitudinal beams; a power source for driving, disposed between the first and second crossbeams; and a brake actuator disposed relative to the second crossbeam on the rear side of the vehicle and on the inner side in the vehicle's width direction relative to the longitudinal beams. The method for replacing the brake actuator includes: The step of removing the power source; The steps for the operator to enter the space between the first crossbeam and the second crossbeam; and The step of an operator entering the space between the first crossbeam and the second crossbeam to approach and handle the brake actuator.

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