阅读说明：本技术 用于与飞机相邻地支撑物体的设备 (Apparatus for supporting an object adjacent to an aircraft ) 是由 布雷特·贝尔 科尔达·达尼 于 2019-07-12 设计创作，主要内容包括：提供用于与飞机相邻地支撑物体的设备。在一个示例中,一种用于与飞机相邻地支撑物体的设备包括旋转托盘组件,该旋转托盘组件包括支撑子组件。平台子组件枢转地耦合到支撑子组件,并且配置为支撑该物体。驱动螺杆子组件可操作地耦合到平台子组件和支撑子组件,以相对于支撑子组件移动平台子组件。旋转托盘组件配置为耦合到升降机,以与飞机相邻地定位旋转托盘组件。(An apparatus for supporting an object adjacent an aircraft is provided. In one example, an apparatus for supporting an object adjacent to an aircraft includes a rotating tray assembly including a support subassembly. The platform subassembly is pivotally coupled to the support subassembly and is configured to support the object. A drive screw subassembly is operatively coupled to the platform subassembly and the support subassembly to move the platform subassembly relative to the support subassembly. The rotating tray assembly is configured to be coupled to an elevator to position the rotating tray assembly adjacent to an aircraft.)

1. An apparatus for positioning an object adjacent to an aircraft, the apparatus comprising:

a rotating tray assembly, comprising:

a support subassembly;

a platform subassembly pivotally coupled to the support subassembly and configured to support the object; and

a drive screw subassembly operatively coupled to the platform subassembly and the support subassembly to move the platform subassembly relative to the support subassembly, wherein the rotating tray assembly is configured to be coupled to an elevator to position the rotating tray assembly adjacent to the aircraft.

2. The apparatus of claim 1, wherein the platform subassembly comprises:

a plate having an upper surface for supporting the object and a lower surface disposed on an opposite side of the upper surface; and

at least one support beam disposed adjacent the lower surface and coupled to the plate.

3. The apparatus of claim 2, wherein the plate has a plurality of openings formed therethrough for securing the object to the plate.

4. The apparatus of claim 3, further comprising at least one clamp configured to engage the object and having at least one positive feature for disposing through at least one of the openings to secure the object to the plate.

5. The apparatus of claim 3, further comprising at least one index plate having at least one positive feature disposed through at least one of the openings and configured to interface with the object to limit movement of the object relative to the plate when the platform subassembly moves relative to the support subassembly.

6. The apparatus of claim 3, wherein the plurality of openings comprise a plurality of slits for receiving at least one strap to secure the object to the plate.

7. The apparatus of claim 2, wherein the at least one support beam has a middle portion disposed between a first end and a second end, and wherein the middle portion of the at least one support beam is pivotally coupled to the support subassembly.

8. The apparatus of claim 7, wherein the support subassembly comprises a support block and at least one support plate coupled to and extending distally from the support block to a distal end portion.

9. The apparatus of claim 8, wherein the middle portion of the at least one support beam is pivotally coupled to the distal portion of the at least one support plate.

10. The apparatus of claim 8, wherein the drive screw subassembly is coupled to the first ends of the at least one support plate and the at least one support beam.

11. The apparatus of claim 10, wherein the drive screw subassembly comprises:

a threaded rod having a rod middle disposed between a first rod end and a second rod end;

a first block disposed about the first rod end and coupled to the first end of the at least one support beam; and

a second block spaced apart from the first block and disposed about the rod middle, wherein the second block is coupled to the at least one support plate of the support subassembly.

12. The apparatus of claim 11, wherein the first block has a first block opening formed therethrough, the first rod end being disposed in the first block opening, and wherein the threaded rod is configured to rotate about a longitudinal axis and the second block has a threaded wall defining a second threaded block opening, and the threaded rod engages the threaded wall when rotated about the longitudinal axis to advance the threaded rod through the second threaded block opening in an opposite direction from the first block to move the platform subassembly relative to the support subassembly.

13. The apparatus of claim 12, wherein the middle portion of the at least one support beam is pivotally coupled to a distal portion of the at least one support plate about a pivot point axis, and wherein rotating the threaded rod about the longitudinal axis rotates the platform subassembly about the pivot point axis.

14. The apparatus of claim 12, wherein the drive screw subassembly further comprises a manual drive element coupled to the second rod end and configured to be manually moved to rotate the threaded rod about the longitudinal axis.

15. The apparatus of claim 11, wherein a clearance release is formed in the support block, the clearance release providing clearance between the threaded rod and the support block when the threaded rod moves the platform subassembly relative to the support subassembly.

16. The apparatus of claim 8, wherein the rotating tray assembly further comprises a support structure having a first portion coupled to the support block of the support subassembly and a second portion configured to be coupled to the elevator.

17. The apparatus of claim 16, wherein the support structure is removably coupled to the support block.

18. An apparatus for positioning an object adjacent to an aircraft, the apparatus comprising:

a rotating tray assembly, comprising:

a support subassembly;

a platform subassembly pivotally coupled to the support subassembly and configured to support the object; and

a drive screw subassembly operatively coupled to the platform subassembly and the support subassembly to move the platform subassembly relative to the support subassembly; and

a support structure coupled to the support subassembly and extending from the support subassembly in a direction away from the platform subassembly; and

a lift coupled to the support structure and configured to vertically move the rotating tray assembly.

19. The apparatus of claim 18, wherein the support structure is removably coupled to the elevator.

20. The apparatus of claim 18, wherein the elevator comprises a pivoting arm configured to move vertically and having a distal end comprising a retaining member with an opening formed therethrough, and wherein the support structure is configured as an elongated element disposed through the opening of the retaining member.

Technical Field

Background

In the aircraft industry, various components and the like are installed and/or removed from an aircraft and/or require maintenance during the life of the aircraft. In one example, a compact laser transmitter assembly (SLTA) as a countermeasure for detecting missiles launched on an aircraft is mounted to or removed from the aft end portion of the aircraft using a car transmission jack. For installation, the fixture for supporting the SLTA unit is raised vertically adjacent the aircraft below the aircraft tail end portion using the vehicle transmission jack. A mechanic or other service person raises vertically on a scissor lift adjacent to the vehicle transmission jack to a height approximately level with the fixture and SLTA unit. Because the aft end portion of the aircraft typically tapers inwardly from the fuselage body at an angle of about 30 ° to 40 °, a mechanic needs to lay on the scissor lift and maneuver the automotive transmission jack to an angle that substantially matches the inwardly tapered angle of the aft end portion of the aircraft to properly tilt or otherwise orient the SLTA unit for installation on the aircraft. Once the angle of the car transmission jack has been adjusted, the mechanic stands up on the scissor lift and proceeds to assemble the SLTA unit to the aft portion of the aircraft and detach the fixture from the SLTA unit. Removing the SLTA unit from the aircraft requires a similar series of steps, some of which are performed in reverse or altered order. Unfortunately, the series of steps to change the angle of the vehicle transmission jack to install, remove and/or repair the SLTA unit or other similar components, such as the Integrated Drive Generator (IDG), is cumbersome and inefficient for the mechanic.

Accordingly, it is desirable to provide an apparatus for supporting an object adjacent an aircraft for installing, removing and/or maintaining the object or other components supported by the object, wherein the angle of at least a portion of the apparatus supporting the object can be easily and efficiently adjusted. Furthermore, other desirable features and characteristics of the various embodiments described herein will become apparent from the subsequent detailed description and the appended claims, taken in conjunction with the accompanying drawings and this background.

Disclosure of Invention

An apparatus for supporting an object adjacent to an aircraft is provided herein. In an exemplary embodiment, an apparatus for supporting an object adjacent to an aircraft includes, but is not limited to, a rotating tray assembly including a support subassembly. The apparatus also includes, but is not limited to, a platform subassembly pivotally coupled to the support subassembly and configured to support the object. The apparatus further includes, but is not limited to, a drive screw subassembly operatively coupled to the platform subassembly and the support subassembly to move the platform subassembly relative to the support subassembly. The rotating tray assembly is configured to be coupled to an elevator to position the rotating tray assembly adjacent to the aircraft.

In another exemplary embodiment, an apparatus for supporting an object adjacent to an aircraft includes, but is not limited to, a rotating tray assembly including a support subassembly. The apparatus also includes, but is not limited to, a platform subassembly pivotally coupled to the support subassembly and configured to support the object. The apparatus further includes, but is not limited to, a drive screw subassembly operatively coupled to the platform subassembly and the support subassembly to move the platform subassembly relative to the support subassembly. The apparatus also includes, but is not limited to, a support structure coupled to the support subassembly and extending from the support subassembly in a direction away from the platform subassembly. The apparatus also includes, but is not limited to, a lift coupled to the support structure and configured to move the rotating tray assembly vertically.

Drawings

Various embodiments will hereinafter be described in conjunction with the appended drawings, wherein like numerals denote like elements, and wherein:

FIG. 1 illustrates a perspective view of an apparatus for positioning an object adjacent to an aircraft including a rotating tray assembly and an elevator, according to an exemplary embodiment;

FIG. 2 illustrates a perspective view of an aft end portion of an aircraft and an apparatus for positioning an object adjacent to the aft end portion of the aircraft, according to an exemplary embodiment;

FIG. 3 illustrates a perspective view of an object supported on a rotating tray assembly, according to an exemplary embodiment;

FIG. 4 illustrates a side view of an object supported on a rotating tray assembly, according to an exemplary embodiment;

FIG. 5 illustrates a top view of an object supported on a rotating tray assembly, according to an exemplary embodiment;

FIG. 6 illustrates a side view of a rotating tray assembly according to an exemplary embodiment;

FIG. 7A illustrates a perspective view of a portion of a rotating tray assembly according to an exemplary embodiment;

FIG. 7B illustrates a perspective view of a portion of a rotating tray assembly, according to an exemplary embodiment;

FIG. 8 illustrates a perspective view of a portion of a rotating tray assembly according to an exemplary embodiment;

FIG. 9 illustrates a perspective view of a portion of a rotating tray assembly according to an exemplary embodiment;

FIG. 10 illustrates a perspective view of a portion of a rotating tray assembly according to an exemplary embodiment;

FIG. 11A illustrates a side view of a rotating tray assembly including a platform subassembly oriented in a substantially horizontal position, according to an exemplary embodiment;

FIG. 11B illustrates a side view of a rotating tray assembly including a platform sub-assembly oriented in a tilted position, according to an exemplary embodiment;

FIG. 12 illustrates a perspective view of a rotating tray assembly including a platform subassembly oriented in an inclined position, according to an exemplary embodiment; and

fig. 13 illustrates a perspective view of a rotating tray assembly according to an exemplary embodiment.

Detailed Description

The following detailed description is merely exemplary in nature and is not intended to limit the various embodiments or the application and uses of the embodiments. Furthermore, there is no intention to be bound by any theory presented in the preceding background or the following detailed description.

Various embodiments contemplated herein relate to an apparatus for supporting an object adjacent to an aircraft to install, remove, and/or repair the object or other components supported by the object. The apparatus includes a rotating tray assembly including a support subassembly. The platform subassembly is pivotally coupled to the support subassembly and is configured to support the object. A drive screw subassembly is operatively coupled to the platform subassembly and the support subassembly to move the platform subassembly relative to the support subassembly. The support structure is coupled to the support subassembly and extends from the support subassembly in a direction away from the platform subassembly. An elevator is coupled to the support structure and configured to move the rotating tray assembly vertically upward and downward.

In an exemplary embodiment, the object is loaded onto a platform subassembly that is oriented in a substantially horizontal position. The elevator vertically moves a rotating tray assembly including a platform subassembly adjacent an exterior portion of the aircraft. A mechanic or other service personnel may be vertically lifted adjacent to the elevated platform subassembly, such as by a scissor lift or other lifting device. Advantageously, in an exemplary embodiment, the drive screw subassembly includes a manual drive element that is actuated or otherwise easily moved by a mechanic or other service personnel to rotate the drive screw subassembly to move (e.g., rotate) the platform subassembly from a substantially horizontal position to a desired tilted position. In the tilted position, the rotating tray assembly statically supports the object adjacent the aircraft in a desired orientation, for example, to facilitate installation, removal, and/or maintenance of the object or other components supported by the object.

Fig. 1 illustrates a perspective view of an apparatus 10 including a rotating tray assembly 12 and an elevator 14, according to an exemplary embodiment. FIG. 2 illustrates a perspective view of the aft end portion 16 of the aircraft 18 and the apparatus 10 supporting an object 20 adjacent the aft end portion 16 of the aircraft 18, according to an exemplary embodiment.

As shown, the lift 14 includes a retaining member 22, such as a sleeve, ring, collar, or other locking member, that maintains a "shaft-like" support structure 23 of the rotating tray assembly 12 in a substantially upright or vertical orientation. As discussed in further detail below, in an exemplary embodiment, the support structure 23 is removably coupled to the retaining member 22 and is adjustable in position therein.

The retaining member 22 is pivotally coupled to a pivot arm 24 of the lift 14 to maintain the support structure 23 in a substantially upright or vertical orientation when the pivot arm 24 is moved vertically upward from a retracted position 28 (shown in fig. 1) to an extended position 30 (shown in fig. 2) adjacent the aft end portion 16 of the aircraft 18. The pivot arm 24 is pivotally coupled to the support body 26 about a pivot point 32 to move (e.g., vertically upward and/or downward) between the retracted position 28 and the extended position 30. Lift 14 may also include wheels 34 mounted to a base frame 36 supporting support 26 to move lift 14 along a floor, platform, or other relatively horizontal or inclined surface by applying manual force (e.g., pushing and/or pulling) to lift 14.

In an exemplary embodiment, the lift 14 is a universal lift and movement of the pivot arm 24 can be accomplished by applying pressure to the pivot arm 24, causing the pivot arm 24 to rotate upward. The application of pressure may be hydraulic, pneumatic or mechanical. Depending on the power system employed on the lift 14, power may not be required to lower (e.g., rotate downward) the pivot arm 24, but only a simple release of gravity and hydraulic or pneumatic pressure. The general purpose elevator is commercially available under the trade name Tronair corporation

Is known as a general purpose lift, Tronair corporation, located at aeronautical freight station east road No. 1, zip code 43558, swanton, ohio. Other types of elevators known to those skilled in the art may be used to move the rotating tray assembly 12 vertically up and down.

Referring also to fig. 3-6, in addition to the support structure 23 as described above, the rotating tray assembly 12 further includes a support subassembly 38, a platform subassembly 40 pivotally coupled to the support subassembly 38, and a drive screw subassembly 42 operatively coupled to the platform subassembly 40 and the support subassembly 38 to move (e.g., pivot, tilt, or otherwise rotate) the platform subassembly 40 relative to the support subassembly 38. The support structure 23 is coupled to the support subassembly 38 and extends from the support subassembly 38 in a direction away from the platform subassembly 40.

Platform subassembly 40 is configured to support object 20 adjacent aircraft 18 for installation, removal, and/or maintenance of object 20 or other components supported by object 20. In the exemplary embodiment and as shown in fig. 2-5, object 20 is a fixture 44 for supporting a component 46, such as a SLTA unit, a generator (e.g., IDG), etc., for installing and/or removing component 46 from aircraft 18 and/or for servicing component 46.

Referring to fig. 3-7B, the platform subassembly 40 includes a plate 48, the plate 48 having an upper surface 50 for supporting the object 20 and a lower surface 52 disposed on an opposite side of the upper surface 50. A support beam 54 is disposed adjacent the lower surface 52, the support beam 54 being spaced apart and coupled to the plate 48. The support beams 54 may include a plurality of openings 56 formed therethrough to reduce the weight of the platform subassembly.

The plate 48 has a plurality of openings formed therethrough, including through holes 60 and slots 62 for securing the object 20 to the plate 48. In the exemplary embodiment, object 20 is placed on upper surface 50 of plate 48 and positioned against at least one index plate 64 disposed on upper surface 50. The indexing plate 64 has a positive feature 66 (e.g., an integrally formed or separate threaded post or fastener) that extends through a corresponding through-hole 60 in the plate 48 and is secured to the plate 48 by a threaded retainer 68 (e.g., a nut, etc.) disposed on the positive feature 66. In the exemplary embodiment, indexing plate 64 has a sidewall 70, where sidewall 70 interfaces with an abutting portion or edge of object 20 to facilitate positioning object 20 on plate 48 and also to limit movement of object 20 relative to plate 48 as platform subassembly 40 moves (e.g., rotates) relative to support subassembly 38, as discussed in further detail below.

In the exemplary embodiment, after positioning object 20 against index plate 64 on upper surface 50, object 20 is secured to plate 48 using one or more clamps 72. As shown, each clamp 72 has a generally "C-shaped" body 74, the body 74 correspondingly engaging a portion of the object 20 and having a positive feature 76 (e.g., an integrally formed or separate threaded post or fastener), the positive feature 76 extending through a corresponding through-hole 60 in the plate 48 and being secured to the plate 48 by a threaded retainer 68 (e.g., a nut, etc.) disposed on the positive feature 76. Alternatively or in addition to using clamps 72, one or more straps 78 may be wrapped around object 20 and disposed through slits 62 to secure object 20 to plate 48.

As shown, support beams 54 each have a central portion 80 disposed between end portions 82 and 84. The middle portion 80 of the support beam 54 has an opening 86 extending therethrough. As discussed in further detail below, the opening 86 serves to define a pivot point 88 to pivotably couple the platform subassembly 40 to the support assembly 38.

Referring also to FIG. 8, in the exemplary embodiment, support subassembly 38 includes a support block 94 and a support plate 96 coupled to opposite sides of support block 94. A support plate 96 extends distally (e.g., upwardly) from the support block 94 to define a space 97 between a distal end portion 98 of the support plate 96 for driving the screw sub-assembly 42. Each support plate 96 includes an opening 100 extending through distal end portion 98 and aligned with opening 86 formed in central portion 80 of support beam 54. As shown, a bushing 90 is disposed through each aligned opening 86 and 100, and a threaded fastener 92 (e.g., a shoulder screw, washer, and self-locking nut) is disposed through each bushing 90 to pivotably couple support beam 54 to a distal portion 98 of a support plate 96, thereby defining pivot point 88.

Referring also to fig. 9, in the exemplary embodiment, drive screw subassembly 42 is coupled to a support plate 96 of support subassembly 38 and independently to end 82 of support beam 54 of platform subassembly 40. As shown, the drive screw subassembly 42 includes blocks 110 and 112 and a threaded rod 102 disposed through the blocks 110 and 112. The threaded rod 102 has a longitudinal axis 101 about which the threaded rod 102 rotates and includes a rod middle 104 disposed between rod ends 106 and 108. The blocks 110 and 112 are spaced apart from each other and disposed about the rod end portion 106 and the rod middle portion 104, respectively.

In the exemplary embodiment, block 110 has a block opening 118 in which rod end 106 is disposed. The block opening 118 is a clearance opening that is sized to provide clearance between the block 110 and the rod end 106. In addition, the use of a slotted nut and cotter pin 120 maintains the axial position of the rod end 106 within the block opening 118. As such, when the threaded rod 102 is rotated about the longitudinal axis 101, there is a gap between the block 110 and the threaded rod 102 to allow the threaded rod 102 to rotate while the slotted nut and cotter pin 120 prevent the rod end 106 from moving axially relative to the block 110 to anchor the rod end 106 to the block 110.

The block 110 is pivotally coupled to the end 82 of the support beam 54. In the exemplary embodiment, block 110 has lateral strap (taped) openings 114 on opposite lateral sides of block 110 that align with openings 115 formed through support beam 54. A press-fit sleeve 113 is disposed through each opening 115 of the support beam 54, the press-fit sleeve 113 having a threaded fastener 116 rotatable within the press-fit sleeve 113, the threaded fastener 116 extending into a corresponding transverse band-shaped opening 114 to couple the end 82 of the support beam 54 of the platform subassembly 40 with the block 110 of the drive screw subassembly 42.

The block 112 is pivotally coupled to the support plate 96. In the exemplary embodiment, block 112 has lateral strap openings 122 on opposite lateral sides of block 112 that align with openings 124 formed through support plate 96. A press-fit sleeve 126 is disposed through each opening 124 of the backer plate 96, the press-fit sleeve 126 having a threaded fastener 127 rotatable within the press-fit sleeve 126, the threaded fastener 127 extending into the corresponding transverse band-shaped opening 122 to couple the backer plate 96 of the backer subassembly 38 with the block 112 of the drive screw subassembly 42.

As described above, the block 112 is disposed around the mid-rod portion 104 of the threaded rod 102. In an exemplary embodiment, the block 112 has a threaded wall 128 defining a threaded block opening 130, the threaded block opening 130 being sized such that when the threaded rod 102 is rotated about the longitudinal axis 101, threads of the threaded rod 102 engage or otherwise engage the threaded wall 128 to advance the threaded rod 102 through the threaded block opening 130.

Referring also to fig. 11A-12, as described above, the intermediate portion 80 of the support beam 54 is pivotally coupled to the distal end portion 98 of the support plate 96 about the pivot point 88. Depending on the direction of rotation of the threaded rod 102 about the longitudinal axis 101, the threaded rod 102 advances through the threaded block opening 130 in a direction toward the block 110 or in a direction opposite the block 110. In an exemplary embodiment, to rotate the platform subassembly 40 from the substantially horizontal position 132 (shown in fig. 11A) to the inclined position 134 (shown in fig. 11B-12), the threaded rod 102 is rotated about the longitudinal axis 101 in a first direction (e.g., clockwise or counterclockwise) and the threaded rod 102 engages the threaded wall 128 to advance the threaded rod 102 through the threaded block opening 130 in a direction opposite the block 110, thereby pulling the block 110 and the end 82 of the support beam 54 toward the block 112 to rotate the platform subassembly 40 in a direction (represented by the single headed arrow 200) about the pivot point 88. Alternatively, to rotate the platform subassembly 40 from the inclined position 134 toward the substantially horizontal position 132, the threaded rod is rotated in a second direction (e.g., counterclockwise or clockwise) opposite the first direction, and the threaded rod 102 engages the threaded wall 128 to advance the threaded rod 102 through the threaded block opening 130 in a direction toward the block 110, thereby urging the block 110 and the end 82 of the support beam 54 away from the block 112 to rotate the platform subassembly 40 in a direction (represented by the single headed arrow 202) about the pivot point 88.

In the exemplary embodiment, and as shown, platform subassembly 40 rotates from a substantially horizontal position 132 to an inclined position 134 that substantially matches an angle of aft end portion 16 of aircraft 18. In one example, the platform subassembly 40 in the tilted position 134 is oriented at an angle of about 30 ° to about 40 ° relative to the substantially horizontal position 132 to substantially match the angle of the aft end portion 16 of the aircraft. However, the angles shown are non-limiting, and it should be understood that the platform subassembly 40 may be rotated to angles less than 30 ° or greater than 40 °.

In an exemplary embodiment, the support block 94 includes a clearance relief 136 (e.g., an angled channel, cutout, etc.) that provides additional clearance in the space 97 between the threaded rod 102 and the support block 94 to allow the threaded rod 102 to move relative to the support subassembly 38 as the platform subassembly 40 rotates. For example, a larger or deeper clearance relief 136 allows the platform subassembly 40 to rotate to an angle greater than 40 °, while a smaller or shallower clearance relief 136 may be required for a platform subassembly 40 that rotates to an angle less than 30 °.

As shown, the drive screw subassembly 42 includes a manual drive element 138 (e.g., a steering wheel, a handle, etc.) operatively coupled to the rod end 108 of the threaded rod 102. When the manual drive element 138 is actuated or otherwise moved (e.g., rotated, turned, etc.), the threaded rod 102 rotates about the longitudinal axis 101. Advantageously, in the exemplary embodiment, manual drive element 138 is positioned to be easily accessed by a mechanic or other service personnel to be manually moved to rotate threaded rod 102 to rotate platform subassembly 40 from substantially horizontal position 132 to desired tilted position 134. In the tilted position 134, the rotating tray assembly 12 statically supports the object 20 in a desired orientation adjacent the aircraft 18, e.g., to facilitate installation, removal, and/or maintenance of the object 20 or other components supported by the object 20.

Referring to fig. 1-6 and 10, as described above, the support structure 23 is removably coupled to the retaining member 22 and is adjustable in position therein (e.g., the height extending upwardly from the retaining member 22 is adjustable). In an exemplary embodiment, the retaining member 22 is configured as a sleeve or collar having an opening 150 (see fig. 1-2) formed therethrough. The support structure 23 is configured as an elongated element (e.g., a shaft, rod, etc.) disposed through the opening 150 of the retaining member 22. The support structure 23 has a plurality of apertures 152a-e and 154 spaced between a lower end 156 and an upper end 158. Locking pins with detachable wire eyelets 160 are positioned in the holes 152a to prevent the support structure 23 from being inadvertently pulled out of the retaining member 22 unless the locking pins and wire eyelets 160 are removed. The position of the support structure 23 may be adjusted to align any of the holes 152b-e with a corresponding hole in the retaining member 22 based on the desired height of the rotating tray assembly 12 from the lift 14, and ball detents may be placed through the desired holes 152b-e to selectively lock the position of the support structure 23 in the retaining member 22.

Referring also to FIG. 8, in the exemplary embodiment, support structure 23 is coupled to a support block 94 of support subassembly 38. As shown, support block 94 includes openings 162 and 164. As shown, openings 164 are also formed through support plate 96. The support structure 23 is disposed in the opening 162, the aperture 154 of the support structure 23 is aligned with the opening 164, and a ball-detent 166 is positioned through the opening 164 and the aperture 154 to removably couple the support structure 23 with the support subassembly 38.

Referring to fig. 7B, 11A, and 13, in an exemplary embodiment, the index plate 64 and the clamp 72 are removably coupled to the plate 48 of the platform subassembly 40. When not in use, the index plate 64 and the clamp 72 may be removed from the plate 48 and stored on the rotating tray assembly 12. As shown, the support beam 54 includes an opening 170, and the opening 170 receives the positive feature 66 of the index plate 64 to store the index plate on the support beam 54. In addition, support subassembly 38 includes an opening 172, opening 172 receiving positive feature 76 of clamp 72 to deposit clamp 72 on support subassembly 38.

While at least one exemplary embodiment has been presented in the foregoing detailed description of the disclosure, it should be appreciated that a vast number of variations exist. It should also be appreciated that the exemplary embodiment or exemplary embodiments are only examples, and are not intended to limit the scope, applicability, or configuration of the disclosure in any way. Rather, the foregoing detailed description will provide those skilled in the art with a convenient road map for implementing an exemplary embodiment of the disclosure. It being understood that various changes may be made in the function and arrangement of elements described in an exemplary embodiment without departing from the scope of the disclosure as set forth in the appended claims.