Telescopic Arm For A Refuse Vehicle

Abstract

A telescopic side arm for a refuse vehicle has an inner and outer boom. A mounting assembly secures the outer boom with a refuse vehicle. A plurality of bearing pads is positioned between the inner and outer booms to provide smooth movement between the inner and outer booms. A plurality of shims is associated with the bearing pads to assure a tight fit between the inner and outer booms.

Claims

1-6. (canceled)

7. A method for assembling a side arm for a refuse vehicle, comprising: inserting a bearing pad into a bearing pad bracket; coupling the bearing pad bracket to an inner boom with a first mechanical fastening and coupling the bearing pad to the inner boom with a second mechanical fastening; inserting the inner boom with the bearing pad and the bearing pad bracket into an elongated bore of an outer boom, the inner boom and the outer boom comprising a telescopic arm assembly with an outer surface of the bearing pad contacting an inner surface of the bore of the outer boom; coupling the telescopic arm assembly to the refuse vehicle; inserting a shim comprising a body having a pair of legs connected by a web between the bearing pad and the inner boom, wherein the second mechanical fastening resides in a gap between the legs of the inserted shim; coupling the shim to the bearing pad bracket; and tightening the first and second mechanical fastenings coupling the bearing pad bracket and the bearing pad to the inner boom.

8. The method of claim 7, wherein the bearing pad bracket comprises a plate having an opening for receiving the inserted bearing pad.

9. The method of claim 8, wherein the bearing pad bracket comprises a tab orthogonal to the plate, and wherein the tab comprises an aperture for receiving the first mechanical fastening.

10. The method of claim 7, further comprising: securing the bearing pad to the bearing pad bracket before coupling the bearing pad bracket to the inner boom.

11. The method of claim 10, wherein coupling the bearing pad bracket to the inner boom comprises aligning the bearing pad with an outer surface of the inner boom.

12. The method of claim 7, further comprising: inserting a second set of bearing pads into a second bearing pad bracket; and coupling the second bearing pad bracket with the second set of bearing pads to the inner boom.

13. The method of claim 12, wherein the second bearing pad bracket comprises a body with three sides, and wherein each of the three sides comprises a separate opening for receiving one of the second set of bearing pads.

14. The method of claim 13, wherein each of the three sides of the second bearing pad bracket is at an obtuse angle relative to an adjacent side of the second bearing pad bracket.

15. The method of claim 14, wherein the second bearing pad bracket further comprises a tab orthogonal to the three sides of the body.

16. The method of claim 7, further comprising: before inserting the inner boom into the elongated bore of the outer boom, coupling a third bearing pad bracket with a third bearing pad to the outer boom.

17. The method of claim 7, wherein coupling the telescopic arm assembly to the refuse vehicle comprises: inserting a journal into an aperture of a mounting bracket supported by the refuse vehicle; coupling the outer boom to a cylindrical bearing; and mounting the cylindrical bearing to the journal.

18. The method of claim 17, wherein mounting the cylindrical bearing to the journal comprises fastening a pillow block over the bearing to the outer boom.

19. The method of claim 17, wherein further comprising: securing the telescopic arm assembly to the mounting bracket by fastening a puller plate to the journal.

20. The method of claim 7, wherein the bearing pad bracket comprises a tab orthogonal to a plate, and wherein inserting the shim between the bearing pad and the inner boom comprises inserting the legs of the shim through a space between the tab and the plate.

21. A method for assembling a side arm for a refuse vehicle, comprising: inserting a bearing pad into an opening of a bearing pad bracket, the bearing pad bracket comprising a plate having the opening and a tab orthogonal to the plate; securing the bearing pad to the bearing pad bracket; coupling the bearing pad bracket to an inner boom with a first mechanical fastening and coupling the bearing pad to the inner boom with a second mechanical fastening; inserting the inner boom with the bearing pad and the bearing pad bracket into an elongated bore of an outer boom, the inner boom and the outer boom comprising a telescopic arm assembly with an outer surface of the bearing pad contacting an inner surface of the bore of the outer boom; coupling the telescopic arm assembly to the refuse vehicle; inserting a shim through a space between the tab and the plate of the bearing pad bracket to a position between the bearing pad and the inner boom, wherein the shim comprises a body having a pair of legs connected by a web, and wherein the second mechanical fastening resides in a gap between the legs of the inserted shim; coupling the shim to the bearing pad bracket; and tightening the first and second mechanical fastenings coupling the bearing pad bracket and the bearing pad to the inner boom.

22. The method of claim 21, wherein coupling the bearing pad bracket to the inner boom comprises aligning the plate of the bearing pad bracket and the bearing pad with an outer surface of the inner boom.

23. The method of claim 21, further comprising: inserting a second set of bearing pads into a second bearing pad bracket; and coupling the second bearing pad bracket with the second set of bearing pads to the inner boom, wherein the second bearing pad bracket comprises a body with three sides, and wherein each of the three sides comprises a separate opening for receiving one of the second set of bearing pads, and wherein each of the three sides of the second bearing pad bracket is at an obtuse angle relative to an adjacent side of the second bearing pad bracket.

24. The method of claim 21, further comprising: before inserting the inner boom into the elongated bore of the outer boom, coupling a third bearing pad bracket with a third bearing pad to the outer boom.

25. The method of claim 21, wherein coupling the telescopic arm assembly to the refuse vehicle comprises: inserting a journal into an aperture of a mounting bracket supported by the refuse vehicle; coupling the outer boom to a cylindrical bearing; and mounting the cylindrical bearing to the journal.

26. The method of claim 25, wherein mounting the cylindrical bearing to the journal comprises fastening a pillow block over the bearing to the outer boom.

27. The method of claim 25, wherein further comprising: securing the telescopic arm assembly to the mounting bracket by fastening a puller plate to the journal.

Description

DRAWINGS

[0012] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.

[0013] FIG. 1 is a perspective view of a refuse vehicle with a side arm collection device.

[0014] FIG. 2 is a perspective view of the telescoping boom.

[0015] FIG. 3 is a perspective view partially exploded like the view of FIG. 2.

[0016] FIG. 4 is an enlarged perspective exploded view of a mounting mechanism.

[0017] FIG. 5 is a perspective view of the boom of the collection arm.

[0018] FIG. 6 is a perspective view of the inner boom.

[0019] FIG. 7 is a bottom perspective view of the boom of FIG. 6.

[0020] FIG. 8 is a partially exploded view of an end of the inner boom.

[0021] FIG. 9 is a perspective partially exploded view of an end of the inner boom.

[0022] FIGS. 10-12 are perspective partially exploded views of an end of the outer boom.

DETAILED DESCRIPTION

[0023] Turning to the figures, FIG. 1 illustrates a refuse vehicle designated with the reference numeral 10. The refuse vehicle 10 includes a cab 12 and a refuse container 14. A telescopic arm 20 is secured with the container 14. The telescopic arm 20 includes a boom section 22 and a grabber 24. The grabber 24 is coupled with the boom section 22 via a rotary actuator 26. The boom section 22 is connected, generally via hydraulic lines, with the refuse vehicle hydraulic system to move the telescopic arm between positions.

[0024] The telescopic arm 20 boom section 22 includes an outer boom 28 and an inner boom 30. The outer boom 28 includes a cylinder mounting portion 32 as well as a mounting assembly 34. The mounting assembly 34 pivotally secures the outer boom 28 with the container 14. The outer boom 28 is an elongated hollow member having a polygonal shape in cross section. In cross section, a top portion is U-shaped with its legs substantially perpendicular to its web. In a bottom portion, it has an overall U-shaped with its legs 38 at an obtuse angle with respect to its web 40. This bottom U-shaped portion enables the inner boom 30 to be self-centered and slide within the outer boom 28. Additionally, the U-shape enables loads to be applied perpendicularly onto the pads. Thus, this provides a larger contact surface between the boom and pads.

[0025] The inner boom 30 is an elongated member and has a cross-section shape similar to the outer boom 28. The inner boom 30, in cross section, has a top half that includes a web 42 and legs 44 that are substantially perpendicular to the web 42. A bottom portion, in cross section, has an U-shaped with legs 46 extending from web 48 at an obtuse angle. Thus, the bottom U-shaped portion enables centering of the inner boom in the outer boom 28.

[0026] The mounting assembly 34 includes a bracket 50 coupled with the container 14. The bracket 50 includes a first member 52 and a second member 54. The first member 52 includes an aperture 56 to receive and mount the end of the cylinder 58, that is couples at its other end with the mounting portion 32 of the outer boom 28. The first member 52 includes a second aperture 60. The bracket 50 may be fixed or movable on the container. Additionally, the second member 54 includes a bore 62. The bores 60, 62 receive a pin assembly 64.

[0027] The pin assembly 64 provides a journal 66 to enable pivoting of the outer boom with respect to the container 14. The pin assembly 64 journal 66 has at least one shown as three, cylindrical bearing members 68, 70, 72. The bearing members 68, 70, 72 are formed from a plastic material to provide a bearing surface. The bearing members 68, 70, 72 are positioned over the journal 66 and pass through the apertures 60, 62 in the brackets. The bearings 70, 72 are received in the bores 60, 62 of the bracket 50. The bearing member 68 is received into the mount 74 on the outer boom 28. The mount 74 includes a circular cutout 76 that is positioned on the bearing when its assembled as illustrated in FIG. 2. Additionally, a plate 78 is secured to the journal 66. The plate 78 acts as a puller plate in a case where the journal freezes or locks in the bracket 50 so that the journal 66 can be removed from the bracket to enable rapid replacement of the telescopic arm 20. A pair of pillow blocks 80, 82 is secured with the mount 74 by a plurality of bolts 84. The telescopic arm 20 is thus pivotably secured to the bracket 50 for pivotal movement of the boom section 22 with respect to the container 14.

[0028] A cylinder 86 is positioned inside of the inner boom 30. The cylinder 86 includes an end portion 88 that secures with the outer boom portion 28 so that the inner boom can be articulated telescopically within the outer boom 28. The inner boom 30 includes a plate 90 that receives the rotary actuator 26.

[0029] The inner boom 30 includes a plurality of bearing pads 100 for enabling sliding movement between the inner boom 30 and the outer boom 28. The bearing pads 100 are held onto the inner boom 30 by brackets 102, 104, 106.

[0030] The bracket 102 has a body 108 with an overall U-shaped including a web portion 110 and legs 112. The web portion 110 includes an aperture 114 to receive bearing pad 100. Tongues 118 project inward from an edge of the wall defining the aperture 114. The tongues 118 couple with cutouts 120 in the pad 100 to retain the bearing pad 100 in the aperture 114. The apertures 114 on the legs 112 are the same as those on the web 110 and are identified with the same reference numerals. The bracket 102 includes a tab 122 that is substantially perpendicular to the web 110. The tab 122 includes apertures 124 to receive fasteners 126 to retain the bracket 102 on the inner boom 28.

[0031] The brackets 104 have an overall L-shape with a first leg 130 and a second leg 132. The first leg 130 includes an aperture 134 to receive a bearing pad 136. The second leg 132 is substantially perpendicular to the leg 130. The second leg 132 includes an aperture 138 at the bend 140 between the two legs 130, 132. The aperture 138 receives shims 150. The second leg 132 also includes apertures 142 that receive fasteners 144 to retain a bracket 104 onto the inner boom 28.

[0032] Shims 150 have an overall U-shaped with a pair of legs 152, 154, defining a slot 155, and a web 156. The web 156 includes a tab 158 that includes an aperture 160 that enables passage of a fastener 162. The shims 150 are passed through the aperture 130 to compensate for the manufacturing variances to provide a tight fit between the outer boom 28 and inner boom 30 once they are assembled together. A plurality of shims 150 can be passed through the aperture 138 to provide for adjustability.

[0033] The bracket 106 has a plate 170 with an aperture 172 to receive the bearing pad 174. A tab 176 projects substantially perpendicular to the plate 170. Tab 176 includes apertures 178 to enable fasteners 180 to pass through the aperture to secure the bracket 106 with the inner boom 30. A plurality of shims 190 are passed under the bracket 106 and bearing pad 174. The shims 190 have an over U-shaped with legs 192, 194, with one larger than the other, connected by web 196. A tab 198 extends substantially perpendicular from the web 196. The tab 198 includes an aperture 200 to receive the fasteners 180. The shims include a slot 202 between the legs 192, 194.

[0034] The bearing pads 136, 174 include hexagonal apertures 204 to receive nuts 206 to retain the bearing pads 174, 136 on the inner boom 30. Bolts 208 pass out of the inner boom 30 to threadably couple with the nuts 206 to retain the pads 174, 136.

[0035] During assembly, the brackets 102, 104 and 106 are positioned onto the inner boom 30. The bracket 102 with bearing pads 116 is secured with the inner boom 30. Since fasteners are unable to pass through the inner boom 28 at this position, the bearing pads 116 are snapped into the bracket 102 via the tongues 118.

[0036] The brackets 104, 106 are loosely secured to the inner boom 30. Additionally, the bearing pads 136, 174 are loosely secured onto the inner boom 30. The shims 150, 190 are positioned underneath the pads 136, 179 with the slots 155, 202 surrounding the bolts 208. Any number of shims 150, 190 can be passed underneath the pads 136, 174 to account for the manufacturing variances. After a satisfactory fit is achieved, the nuts are tightened down to secure the brackets 102, 104, 106, shims 150, 190 and bearing pads 136, 174 with the inner boom 30.

[0037] Turning to FIGS. 10-12, brackets with bearing pads for the outer boom 28 are illustrated. The outer boom 28 includes bearing brackets 230, 232 and 234. Bearing bracket 230 includes a frame 236 with an aperture 238 to receive bearing pad 176. A tab 240 extends perpendicular to the frame 236. The tab 240 includes apertures 242 to receive bolts 244 to retain the bracket 230 on the outer boom 28. Shims 250 are positioned underneath the bracket to account for manufacturing variations. The shims 250 have an overall U-shape with legs 252, 254 connected by web 256. A slot 258 is formed between the legs 252, 254. A tab 260 extends substantially perpendicular from the web 266. Also, the tab includes an aperture 262 to receive bolt 244 to secure the shims 250 with the outer boom 28.

[0038] Brackets 232 include a frame 270 with an aperture 272. A tab 274 extends from the frame 270. The tab 274 is angled with respect to the longitudinal axis of the frame 270. Also, the tab 274 is bent to be substantially perpendicular to the frame 270. The tab 274 includes an aperture 276 to receive shims 290. The tab 274 also includes apertures 278 that receive bolts 280 to retain the brackets 232 on the outer boom 28. A bearing pad 282 is positioned into the aperture 272. The bearing aperture 282 has hexagonal apertures to receive a nut which, in turn, receives bolts to retain the bearing pad 282 onto the inner surface of the outer boom 28.

[0039] The shims 290 have an overall L-shape with a first leg 292 and a second leg 294. The first leg 292 has an overall U-shaped with legs 296, 298 defining a slot 300. The legs 296, 298 are connected by a web 302. The second leg 294 extends from the web 302. The second leg 294 includes apertures 304 to receive bolts 280 to retain the shims 290 on the outer boom 28. The second leg 294, while being perpendicular to the first leg 292, is also angled with respect to the longitudinal axis of the first leg 292. This enables the connection of the shims 290 with the outer boom 28.

[0040] The shims 150, 190, 250, 290 are able to be added without disassembly of the booms. Thus, this accounts for pad wear and enables faster change time.

[0041] The bracket 234 is similar to bracket 102. The bracket 234 includes a frame 306 with an overall U-shaped including a web 308, and legs 310, 312. The web 308 includes an aperture 314 that receives a bearing pad 316. The bearing pad 316 is bolted onto the outer boom 28. The legs 310, 312 likewise include an aperture 320 to receive bearing pads 322. The bearing pads 322 are also bolted onto the outer boom 28. A tab 324 extends from the web 308. The tab 324 is substantially perpendicular to the web 308. The tab 324 includes apertures 326 that receive bolts 328 to retain the bracket 234 on the outer boom 28.

[0042] The bracket 234 is attached to the outer boom 230 with the bearing pads 316, 322 secured in place. The brackets 232, 234 are loosely secured to outer boom 28. The shims 290, 250 are positioned underneath the bearing pads 176, 282. Once the inner boom 30 is in place and a tight fit is assured, the bolts are tightened to maintain the brackets 232, 234 and bearing pads 176, 282 in place.

[0043] The foregoing description of the embodiments has been provided for purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same may also be varied in many ways. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.