MODULAR LEVELING ASSEMBLY FOR VEHICLE

Abstract

A modular leveling assembly for a vehicle includes a mounting bracket configured to mount to a vehicle component, a hydraulic cylinder assembly, including an inner piston rod member fixed with respect to the mounting bracket, and a first outer cylinder receiving the inner piston rod member therein, wherein the first outer cylinder is telescopingly moveable with respect to the inner piston rod member from a retracted position and an extended position, a support member coupled to a distal end of the first outer cylinder and configured to abut a ground surface when the first outer cylinder member is in the extended position, and a hydraulic pump assembly supported by the mounting bracket and hydraulically coupled to the cylinder assembly.

Claims

1. A modular leveling assembly for a vehicle, comprising: a mounting bracket configured to mount to a vehicle component; a hydraulic cylinder assembly, comprising: an inner piston rod member fixed with respect to the mounting bracket; and a first outer cylinder receiving the inner piston rod member therein, wherein the first outer cylinder is telescopingly moveable with respect to the inner piston rod member from a retracted position and an extended position; a support member coupled to a distal end of the first outer cylinder and configured to abut a ground surface when the first outer cylinder member is in the extended position; and a hydraulic pump assembly supported by the mounting bracket and hydraulically coupled to the cylinder assembly.

2. The modular leveling assembly of claim 1, further comprising: a second outer cylinder fixed with respect to the mounting bracket and the inner piston rod, the second outer cylinder telescopingly receiving the first outer cylinder therein.

3. The modular leveling assembly of claim 2, wherein the second outer cylinder and the mounting bracket are integral with one another.

4. The modular leveling assembly of claim 1, wherein the inner piston rod has a longitudinally-extending first chamber hydraulically coupled to the hydraulic pump assembly.

5. The modular leveling assembly of claim 4, wherein the inner piston rod member and the first outer cylinder cooperate to define a second chamber therebetween, where the second chamber is hydraulically coupled to the hydraulic pump assembly.

6. The modular leveling assembly of claim 1, wherein the hydraulic pump assembly comprises a positive displacement pump.

7. The modular leveling assembly of claim 1, wherein the hydraulic pump assembly comprises a rotary pump.

8. The modular leveling assembly of claim 1, wherein the hydraulic pump assembly includes at least one drive motor and a drive gear arrangement.

9. The modular leveling assembly of claim 8, wherein the at least one drive motor includes a plurality of drive motors.

10. The modular leveling assembly of claim 1, wherein the pump assembly is configured to be mounted to a proximal end of the mounting bracket between a plurality of radially offset positions.

11. A modular leveling assembly for a vehicle, comprising: a mounting bracket configured to couple to a vehicle component; a hydraulic cylinder assembly, comprising: an inner piston rod member having a longitudinally-extending first chamber, wherein the inner piston rod member is configured to be fixed with respect to a vehicle component; and a first outer cylinder receiving the inner piston rod member therein, wherein the first outer cylinder is telescopingly moveable with respect to the inner piston rod member between a retracted position and an extended position, wherein the inner piston rod member and the first outer cylinder cooperate to define a second chamber therebetween; and a hydraulic pump assembly operably coupled to the hydraulic cylinder, wherein the hydraulic pump assembly is hydraulically coupled to each of the first chamber and the second chamber.

12. The modular leveling assembly of claim 11, further comprising: a second outer cylinder fixed with respect to the inner piston rod and telescopingly receiving the first outer cylinder therein, wherein the first outer cylinder and the second outer cylinder cooperate to define a third chamber therebetween, wherein the hydraulic pump assembly is hydraulically coupled to the third chamber.

13. The modular leveling assembly of claim 12, wherein the mounting bracket and the second outer cylinder are integral with one another.

14. The modular leveling assembly of claim 11, further comprising: a support member coupled to a distal end of the first outer cylinder and configured to abut a ground surface when the first outer cylinder member is in the extended position.

15. The modular leveling assembly of claim 11, wherein the hydraulic pump assembly comprises a positive displacement pump.

16. The modular leveling assembly of claim 11, wherein the hydraulic pump assembly includes at least one drive motor and a drive gear arrangement.

17. The modular leveling assembly of claim 16, wherein the at least one drive motor includes a plurality of drive motors.

18. A modular leveling assembly for a vehicle, comprising: a mounting bracket configured to mount to a vehicle component; a hydraulic cylinder assembly, comprising: an inner piston rod member; and a first outer cylinder receiving the inner piston rod member therein, wherein the inner piston rod member and the first outer cylinder are telescopingly moveable with respect to one another between a retracted position and an extended position; and a hydraulic pump assembly hydraulically coupled to the cylinder assembly, the hydraulic pump assembly comprising: a positive displacement pump gear assembly; at least two drive motors; and a drive gear assembly operably coupling the at least two drive motors to the positive displacement pump gear assembly.

19. The modular leveling assembly of claim 18, wherein the at least two drive motors includes at least four drive motors.

20. The modular leveling assembly of claim 18, wherein each of the at least two drive motors includes a drive shaft and a drive gear fixed for rotation with the drive shaft, and wherein the gear drive assembly includes a receiving gear that engages each of drive gears.

21. The modular leveling assembly of claim 18, wherein the hydraulic pump assembly comprises a rotary pump.

22. The modular leveling assembly of claim 18, wherein the pump assembly further comprises a hydraulic fluid reservoir in fluid communication with the hydraulic pump.

23. The modular leveling assembly of claim 22, wherein the hydraulic fluid reservoir is collapsible.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0010] FIG. 1 is a side elevational view of a vehicle, including a trailer assembly, supported above a ground surface by a plurality of modular leveling assemblies;

[0011] FIG. 2 is a front perspective view of a modular leveling assembly;

[0012] FIG. 3 is a rear perspective view of the modular leveling assembly;

[0013] FIG. 4 is a front cross-section elevational view of the modular leveling assembly taken through the line IV-IV, FIG. 2, with the modular leveling assembly in a retracted position;

[0014] FIG. 5 is a front cross-section elevational view of the modular leveling assembly shown in an extended position;

[0015] FIG. 6 is a schematic view of a pneumatic circuit of the modular leveling assembly;

[0016] FIG. 7 is a perspective view of a drive motor assembly that includes a plurality of drive motors;

[0017] FIG. 8 is a top plan view of the drive motor assembly;

[0018] FIG. 9 is a cross-sectional rear elevational view of the modular leveling assembly taken through the line VIII-VIII, FIG. 3;

[0019] FIG. 10 is a top plan view of the modular leveling assembly illustrating a hydraulic reservoir in a plurality of connection configurations;

[0020] FIG. 11 is a top plan view of the modular leveling assembly;

[0021] FIG. 12 is a cross-section elevational view of the modular leveling assembly taken along the line XII-XII; FIG. 11; and

[0022] FIG. 13 is an enlarged view of the area XIII, FIG. 12.

DETAILED DESCRIPTION

[0023] For purposes of description herein, the terms “upper,” “lower,” right,” “left,” “rear,” “front,” “vertical,” “horizontal,” and derivatives thereof shall relate to the invention as oriented in FIGS. 1-3. However, it is to be understood that the invention may assume various alternative orientations and step sequences, except where expressly specified to the contrary. It is also to be understood that the specific devices and processes illustrated in the attached drawings, and described in the following specification are exemplary embodiments of the inventive concepts defined in the appended claims. Hence, specific dimensions and other physical characteristics relating to the embodiments disclosed herein are not to be considered as limiting, unless the claims expressly state otherwise.

[0024] The reference numeral 10 (FIGS. 1-3) generally designates a modular leveling assembly, wherein a plurality of modular leveling assemblies may be utilized to support a vehicle, such as a trailer assembly 12 above a ground surface 14. In the illustrated example, the modular leveling assembly 10 includes a mounting bracket 16, a hydraulic cylinder assembly 18, and a hydraulic pump assembly 20, wherein the modular leveling assembly 10 is operable between a retracted position A (FIG. 4) and an extended position B (FIG. 5), as further described below.

[0025] In the illustrated example, the mounting bracket 16 includes a body portion 22 integrally formed with a mounting plate 24 that includes a pair of flanges 26 that extend outwardly from the body portion 22 and include a plurality of mounting apertures 28 each configured to receive mounting hardware such as bolts 30 therethrough to mount the modular leveling assembly 10 to a vehicle frame member 32. The body portion 22 of the mounting bracket 16 includes a proximal end 34 and a distal end 36.

[0026] The hydraulic cylinder assembly 18 (FIGS. 4 and 5) includes an inner piston rod 38, a first outer cylinder 40 and a second outer cylinder 42, wherein the inner piston rod member 38 and the second outer cylinder 42 are fixed with respect to the mounting bracket 16, and wherein the first outer cylinder 40 is telescopingly movable with respect to the inner piston rod member 38 and the second outer cylinder 42 such that the first outer cylinder 40 is movable between the retracted and extended positions A, B. In the illustrated example, the second outer cylinder 42 is integral with the mounting bracket 16, but may comprise a separate piece from the mounting bracket 18 depending upon the application. The inner piston rod member 38 includes a longitudinally-extending first chamber 44, the inner piston rod member 38 and the first outer cylinder 40 cooperate to define a second chamber 46 therebetween, and the first outer cylinder 40 and the second outer cylinder 42 cooperate to define a third chamber 48 therebetween, where the first chamber 44, the second chamber 46 and the third chamber 48 are in hydraulic communication with the hydraulic pump assembly 20. A first piston 50 is fixedly coupled to a distal end of the inner piston rod member 38 and a second piston 52 is fixedly coupled to a distal end of the first outer cylinder 40, where the first outer cylinder 44, the first piston 50 and the second piston 52 cooperate to define a fourth chamber 54 that is in hydraulic communication with the first chamber 44 and expands as the first outer cylinder 40 is moved from the retracted position A toward the extended position B by receiving hydraulic fluid from the first chamber 44. Specifically, and as best illustrated in FIG. 6, the hydraulic pump assembly 20 includes a two-way hydraulic motor 56, as further described below, where the motor drives a hydraulic pump 58 controlled through a pneumatic circuit 60 that includes first and second normally open, pressure reducing valves 62, 64, a two-way check valve 66 and a pair of check valves 68, 70 pneumatically coupling and controlling the hydraulic fluid provided by the motor assembly 56 and hydraulic pump 58.

[0027] In operation, the hydraulic pump assembly 20 actuates the first outer cylinder 40 from the retracted position A toward the extended position B by providing hydraulic fluid pressure in a path 72 through the first chamber 44 and into the fourth chamber 54, and from the extended position B toward the retracted position A by moving fluid from the fourth chamber 54 through the first chamber 44 and into the third chamber 48 via the second chamber 46 along a path 74.

[0028] As best illustrated in FIGS. 7 and 8, the hydraulic pump assembly 20 includes the motor assembly 56 and the hydraulic pump 58. In the illustrated example, the motor assembly 56 may include one or more drive motors 76, wherein the drive motors 76 may be separately powered or actuated so as to provide increased power to the hydraulic pump 58 depending upon the specific application. The multi-motor arrangement allows for a standardized modular leveling assembly 10 to be applied or attached to vehicles that have lifting requirements that vary with respect to one another by including additional drive motors 76 as necessary, and may also be utilized in a step-type power arrangement, where the drive motors 76 within a given modular leveling assembly 10 are individually actuated so as to increase or decrease the power supplied to the hydraulic pump 58 as the given modular leveling assembly 10 is actuated between the retracted and extended positions A, B, thereby reducing energy consumption within the overall system. Each drive motor 76 includes a driveshaft 80 and a drive gear 82 fixed for rotation with the driveshaft 80. Each drive gear 82 engages a single receiving gear 84. In the illustrated example, the hydraulic pump 58 includes a positive displacement pump, and specifically a gear-type positive displacement pump, although other types of positive displacement pumps including rotary pumps, screw pumps, rotary vane pumps, lobe pumps, and the like may also be utilized.

[0029] As illustrated in FIGS. 7 and 8, the receiving gear 84 is fixed for rotation with a driveshaft 86 of the hydraulic pump 58, a drive gear 88 fixed for rotation with the driveshaft 84, an idler gear 90 engaging the drive gear 86 and fixed for rotation with an idler shaft 92 where the driveshaft 86 and the idler shaft 92 with a hydraulic pump body 94.

[0030] The modular leveling assembly 10 may further include a hydraulic reservoir 100 (FIG. 9) that is configured to be attached to the proximal end 34 of the mounting bracket 16 at a plurality of radial positions as best illustrated in FIG. 10, thereby allowing the overall modular leveling assembly 69 to be configured so as to be utilized within vehicles having varying packaging restrictions. In the illustrated example, the hydraulic reservoir 100 includes a first end wall 102, a second end wall 104 and a collapsible side wall 106, where the side wall 106 has an accordion-type configuration. The overall configuration of the hydraulic reservoir 100 allows the reservoir to expand and collapse as fluid is moved between the retracted and extended positions A, B where the first, second, third and fourth chambers 44, 46, 48, 54 and the hydraulic reservoir 100 are void of air.

[0031] The modular leveling assembly 10 (FIG. 10) may also be configured such that the hydraulic pump assembly 20 may be attached to the hydraulic cylinder assembly 18 at varying radial positions, such as a first position X, a second position Y radially offset from the first position X by about 90°, and a third position Z radially offset from the second position Y be about 90°. As best illustrated in FIGS. 11-13, the hydraulic motor assembly 20 is coupled to the mounting bracket 16 and the hydraulic cylinder assembly 18 via a coupling arrangement 120 that includes a collar assembly 122 having a first portion 124 secured to the hydraulic motor assembly 20, and a second portion or collar 126 that receives the proximal end of the hydraulic cylinder assembly 18 therein. The collar 126 is secured to the hydraulic cylinder via locking screws 128 that threadably extend through threaded apertures 130 of the collar 126, and that are received into recesses 132 of the body portion 22/second outer cylinder 42 spaced about a circumference of the body portion 22/second outer cylinder 42. In the illustrated example, the recesses 132 are spaced at 90° intervals from one another corresponding to the first, second and third positions X, Y, Z, although other spacing may be provided depending upon the packing requirements of the particular application.

[0032] The modular leveling assembly as shown and described herein may be variously configured thereby allowing the assembly to be utilized within numerous vehicle platforms with varying packaging limitations and overall configurations. The modular leveling assembly is efficient in use, provides reduced overall energy consumption, efficiency during operation, is highly durable, is capable of a long operating life, and is particularly well adapted for the proposed use.