Grabber for a front loader refuse vehicle

Abstract

A grabber assembly has a beam assembly with a bracket. A grabber gear assembly is coupled with the bracket. The grabber gear assembly has a pair of gear mechanisms coupled with the bracket. Each gear mechanism has a shaft and a pair of thrust bearings, one at each end of the shaft. A grabber arm mounting pad is coupled with each shaft. A gear section is coupled with each shaft. The gear sections of each shaft mesh with one another to drive the grabber arm mounting pads. An actuating driver is coupled with one of the shafts to drive the grabber gear assembly and move the arms between an open and grasping position.

Claims

1. A grabber assembly comprising: a beam; a bracket coupled to the beam; a first grabber arm operatively coupled to a second grabber arm, the first grabber arm comprising: a shaft defining a longitudinal axis and having opposing first and second end portions, the shaft rotatably mounted to the bracket at the first end portion; a grabber mounting pad supported on the shaft and rotatable with the shaft; a gear section supported on the second end portion of the shaft and rotatable with the shaft; and a driver mount connected to the shaft and axially positioned between the bracket and the gear section along the longitudinal axis; and an actuating driver connected to the shaft through the driver mount, the actuating driver configured to, upon actuation, selectively move in alternative retracted and extended states and drive the shaft of the first grabber arm, wherein the first grabber arm is configured to drive a shaft of the second grabber arm through the gear section, the shaft of the first grabber arm being offset from the shaft of the second grabber arm in a horizontal direction that is transverse to the longitudinal axis, and wherein at least a portion of the driver mount resides in a space horizontally between the shaft of the first grabber arm and the shaft of the second grabber arm during at least one of the alternative retracted and extended states of the actuating driver.

2. The grabber assembly of claim 1, further comprising a pair of thrust bearings, one of the thrust bearings residing at each of the two ends of the shaft.

3. The grabber assembly of claim 2, wherein at least one of the thrust bearings is attached with the bracket on the beam.

4. The grabber assembly of claim 2, wherein at least one of the thrust bearings comprises a spherical thrust bearing.

5. The grabber assembly of claim 4, wherein the spherical thrust bearing comprises a housing, an outer ring, and an inner ring, wherein the outer and inner rings reside radially inboard of an outer wall of the housing.

6. The grabber assembly of claim 5, wherein the spherical thrust bearing further comprises a first fastener connecting the housing to the bracket and a second fastener securing the outer ring on the shaft of the first or second grabber arm.

7. The grabber assembly of claim 1, wherein at least a portion of the first and second grabber arms is composed of a material including spring steel.

8. The grabber assembly of claim 7, further comprising first and second belts, each of the first and second belts held in tension by the portion of the first and second grabber arms composed of the material including spring steel.

9. The grabber assembly of claim 1, wherein the actuating driver comprises a cushioned cylinder.

10. The grabber assembly of claim 1, wherein the actuating driver is configured to linearly extend and retract, and wherein the driver mount is connected to the shaft and the actuating driver such that: linear extension of the actuating driver drives the shaft through the driver mount to rotate in a first direction that transitions the first grabber arm to an open position; and linear retraction of the actuating driver drives the shaft through the driver mount to rotate in a second direction that transitions the first grabber arm to a closed position.

11. The grabber assembly of claim 1, wherein the actuating driver is secured to the driver mount by a pin engagement, and wherein the driver mount is directly connected to the shaft.

12. An apparatus comprising a refuse container and grabber arm, the apparatus comprising: a container for receiving refuse; a grabber assembly for dumping a refuse cart into the container, the grabber assembly comprising: a beam; a bracket coupled to the beam; a first grabber arm operatively coupled to a second grabber arm, the first grabber arm comprising: a shaft defining a longitudinal axis and having opposing first and second end portions, the shaft rotatably mounted to the bracket at the first end portion; a grabber mounting pad supported on the second end portion of the shaft and rotatable with the shaft; a gear section supported on the shaft and rotatable with the shaft; and a driver mount connected to the shaft and axially positioned between the bracket and the gear section along the longitudinal axis; and an actuating driver connected to the shaft through the driver mount, the actuating driver configured to, upon actuation, selectively move in alternative retracted and extended states and drive the shaft of the first grabber arm, wherein the first grabber arm is configured to drive a shaft of the second grabber arm through the gear section, the shaft of the first grabber arm being offset from the shaft of the second grabber arm in a horizontal direction that is transverse to the longitudinal axis, and wherein at least a portion of the driver mount resides in a space horizontally between the shaft of the first grabber arm and the shaft of the second grabber arm during at least one of the alternative retracted and extended states of the actuating driver.

13. The apparatus of claim 12, further comprising a pair of thrust bearings, one of the thrust bearings residing at each of the two ends of the shaft, wherein at least one of the thrust bearings comprises a spherical thrust bearing comprising a housing, an outer ring, and an inner ring, wherein the outer and inner rings reside radially inboard of an outer wall of the housing, and wherein the spherical thrust bearing further comprises a first fastener connecting the housing to the bracket and a second fastener securing the outer ring on the shaft of the first or second grabber arm.

14. The apparatus of claim 12, wherein at least a portion of the first and second grabber arms is composed of a material including spring steel, and further comprising first and second belts, each of the first and second belts held in tension by the portion of the first and second grabber arms composed of the material including spring steel.

15. The apparatus of claim 12, wherein the actuating driver is configured to linearly extend and retract, and wherein the driver mount is connected to the shaft and the actuating driver such that: linear extension of the actuating driver drives the shaft through the driver mount to rotate in a first direction that transitions the first grabber arm to an open position; and linear retraction of the actuating driver drives the shaft through the driver mount to rotate in a second direction that transitions the first grabber arm to a closed position.

16. The apparatus of claim 12, wherein the actuating driver is secured to the driver mount by a pin engagement, and wherein the driver mount is directly connected to the shaft.

17. A refuse vehicle comprising: a chassis with a cab and a primary collecting container and a drive train for moving the refuse vehicle; front loading arms on the refuse vehicle; a container for receiving refuse, the container coupled to the front loading arms; a grabber assembly for dumping a refuse cart into the container, the grabber assembly comprising: a beam; a bracket coupled to the beam; a first grabber arm operatively coupled to a second grabber arm, the first grabber arm comprising: a shaft defining a longitudinal axis and having opposing first and second end portions, the shaft rotatably mounted to the bracket at the first end portion; a grabber mounting pad supported on the shaft and rotatable with the shaft; a gear section supported on the second end portion of the shaft and rotatable with the shaft; and a driver mount connected to the shaft and axially positioned between the bracket and the gear section along the longitudinal axis; and an actuating driver connected to the shaft through the driver mount, the actuating driver configured to, upon actuation, selectively move in alternative retracted and extended states and drive the shaft of the first grabber arm, wherein the first grabber arm is configured to drive a shaft of the second grabber arm through the gear section, the shaft of the first grabber arm being offset from the shaft of the second grabber arm in a horizontal direction that is transverse to the longitudinal axis, and wherein at least a portion of the driver mount resides in a space horizontally between the shaft of the first grabber arm and the shaft of the second grabber arm during at least one of the alternative retracted and extended states of the actuating driver.

18. The refuse vehicle of claim 17, further comprising a pair of thrust bearings, one of the thrust bearings residing at each of the two ends of the shaft, wherein at least one of the thrust bearings comprises a spherical thrust bearing comprising a housing, an outer ring, and an inner ring, wherein the outer and inner rings reside radially inboard of an outer wall of the housing, and wherein the spherical thrust bearing further comprises a first fastener connecting the housing to the bracket and a second fastener securing the outer ring on the shaft of the first or second grabber arm.

19. The refuse vehicle of claim 17, wherein the actuating driver is configured to linearly extend and retract, and wherein the driver mount is connected to the shaft and the actuating driver such that: linear extension of the actuating driver drives the shaft through the driver mount to rotate in a first direction that transitions the first grabber arm to an open position; and linear retraction of the actuating driver drives the shaft through the driver mount to rotate in a second direction that transitions the first grabber arm to a closed position.

20. The refuse vehicle of claim 17, wherein the actuating driver is secured to the driver mount by a pin engagement, and wherein the driver mount is directly connected to the shaft.

Description

DRAWINGS

(1) 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.

(2) FIG. 1 is a perspective view of a truck with an intermediate can and a grabber arm assembly.

(3) FIG. 2 is a perspective view of the grabber arm assembly.

(4) FIG. 3 is a perspective view of the grabber arm grasping a refuse cart.

(5) FIG. 4 is a perspective view of the grabber gear assembly with the plate removed.

(6) FIG. 5 is a front elevational view of the grabber gear assembly with the grabber arms, plate, and top bracket removed.

(7) FIG. 6 is a rear elevational cross section view through FIG. 5 but including the top bracket.

(8) FIG. 7 is a top elevational view of the grabber gear assembly with the beam, grabber arms, plate, and top bracket removed.

(9) FIG. 8 is a perspective view of the grabber gear assembly with the grabber arms, plate, and top bracket removed.

DETAILED DESCRIPTION

(10) Example embodiments will now be described more fully with reference to the accompanying drawings.

(11) Turning to the figures, in FIG. 1 a refuse collection vehicle is illustrated and designated with the reference numeral 10. The vehicle 10 includes a cab 12 with a chassis 14 that includes a primary collecting container 16. Also, a drivetrain, including wheels 18, moves the vehicle in a conventional manner. The vehicle 10 includes front loading arms 20 that include an intermediate can 22. The intermediate can 22 includes a grabber arm assembly 24.

(12) Turning to FIG. 2, the grabber arm assembly 24 is illustrated. The grabber arm assembly 24 includes a beam assembly 26. The beam assembly 26 has an overall L-shape with a cylindrical bore 28 to receive a pivot pin. The cylindrical bore 28 enables the beam 26, as well as the grabber arm assembly 24, to pivot with respect to the intermediate can 22. The beam assembly 26 includes a bracket assembly 30 on one of the L-shaped legs 32. The bracket assembly 30 includes a grabber gear assembly 34 that moves the grabber arms 36, 38 between the grasping and release positions. The grabber arms 36, 38 include belt members 40. The belt members 40 contact the refuse carts 42 when grasping the refuse carts, as illustrated in FIG. 3. The arms 36, 38 are manufactured from a spring steel material. Also, a stop 44 is positioned on the bracket assembly 30 to keep gear assembly 34 from coming into contact with refuse carts 42.

(13) Turning to FIGS. 4 through 8, a better understanding of the grabber gear assembly 34 will be obtained.

(14) The grabber gear assembly 34 includes a pair of gear mechanisms 50, 52. The gear mechanisms 50, 52 are substantially identical and the explanation of one will apply to both. The gear mechanisms 50, 52 includes a pair of spherical thrust bearings 54, 56. The first thrust bearing 54 is secured to the first bracket plate 58. The second thrust bearing 56 is secured to the second bracket plate 60. A shaft or pivot pin 62 is positioned between the thrust bearings 54, 56. The shaft ends are connected with the thrust bearings 54, 56. One of the shafts 62 includes a driver mounting bracket 64.

(15) The spherical thrust bearings 54, 56 can be the same or different. In the current illustration, they are the same. The thrust bearings include a housing 66, outer ring 68 and inner ring member 70. A fastener 72 abuts washer 74 which secures the ring member 70 on the shaft 62. The spherical thrust bearings 54, 56 operates in a conventional manner. The housings 66 are secured with the bracket plates 58, 60 to secure the gear mechanisms 50, 52 with the bracket assembly 30.

(16) Each shaft 62 includes an arm pad mounting bracket 76, 78. Each arm pad mounting bracket 76, 78 includes a mounting pad 80. Shaft supports are coupled with the shaft 62 to secure the arm pad mounting brackets 76, 78 onto the shaft 62.

(17) Gear sections 86, 88 are mounted on the shafts 62. The gear sections 86, 88 mesh with one another to provide rotational movement of the arm pad mounting supports 76, 78 which, in turn, move the arm pad mounting supports 76, 78 as well as the grabber arms 36, 38 between an opened and a grasping position.

(18) An actuating driver 90 is coupled with the bracket 64 via a pin 92. The actuating driver 90 can be a pneumatic or hydraulic cylinder or the like. The cylinder is a cushioned cylinder. The cushion cylinder enables a smooth operation of the cylinder to enable the opening and grasping of the grabber arms 36, 38. The cylinder is retracted to close or grasp and extends to open. Thus, with the use of downstream hydraulics, any valve leakage or cylinder leakage of the pistons will cause the grabber to move the arms 36, 38 to their opened position.

(19) The gear sections 86, 88 are used to time the grabber arms 36, 38 to enable the gear mechanisms 50, 52 to be positioned closer together by a factor of two compared with existing grabbers. This enables the beam assembly 26 to be reshaped and enable the grabber arms 36, 38 to be inserted between closely positioned refuse carts as illustrated in FIG. 3. Also, the grabber arms 36, 38, due to the spring steel, can deflect. This enables the grabber belts 40 to automatically adjust for a variety of to be picked up refuse carts. The belts 40 tensioned from the grabber arms 36, 38 are sized to create a uniform load on the refuse carts. This provides a better grip on the cart. Also, rotation of the grabber gear assembly 34 is driven in an equal rotation so that both sides of a refuse cart will experience the same amount of force. The cushioned cylinder 90, while enabling smooth operation, also reduces impact.

(20) The self-aligning spherical thrust bearings provide a larger contact area as the arm moves from a pick up to a dump position. This permits angular misalignment and can withstand radial or heavy axial loads. This increases durability under rotational impact conditions such as lifting and dumping a refuse cart. The grabber arm may also be utilized on the chassis and dump directly into the primary container.

(21) 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.