Chassis assemblies for trailers

Abstract

Chassis assemblies for trailers are described herein. The chassis assemblies include a chassis weldment configured to support a body of the trailer and a walking beam assembly coupled to the chassis weldment. The walking beam assembly includes a bogie having a pair of mounting portions for mounting the chassis weldment to the walking beam assembly and a bogie pin extending outwardly from the pair of mounting portions. The walking beam assembly also includes a pair of walking beams coupled to the bogie pin. Each walking beam has an aperture for receiving the bogie pin. The walking beam assembly also includes a pair of subassemblies independently coupled to the bogie. Each subassembly includes an axle extending transverse to the walking beams, a pair of tower springs, a pair of support members coupled to and extending from each axle and a spherical bushing.

Description

Title: CHASSIS ASSEMBLIES FOR TRAILERSCross Reference to Related Applications

[0001] The present application claims priority to United States Provisional Patent Application No. 63 / 637,589 entitled “Chassis Assemblies for Trailers”, filed April 23, 2024, the entire contents of which are hereby incorporated by reference herein in their entirety.Technical Field

[0002] This disclosure relates generally to chassis assemblies, and, more specifically, to chassis assemblies for dump trailers.Background

[0003] Dump trucks and dump trailers have dump bodies that are configured for transporting and discharging debris such as tree stumps, rocks, dirt, and sand. The dump bodies are typically mounted onto a chassis assembly that includes a suspension system for cushioning the dump body during travel.

[0004] Current suspension systems of chassis assemblies of dump trucks and other dump vehicles include spindles, or pins, that may be directly welded onto a walking beam or other component for strength. In these cases, the pins may wear and become damaged as other steel components press and / or rub against them.

[0005] Further, current pins are designed to be accessible for maintenance and / or replacement, therefore being susceptible to dirt and debris surrounding the pin and negatively impacting its functioning.

[0006] Accordingly, there is a need for new chassis assemblies, and, more specifically, for chassis assemblies with fewer welded pivot points.Summary

[0007] In accordance with a broad aspect, a chassis assembly for a dump trailer is described herein. The chassis assembly includes a chassis weldment configured to support a dump body of the dump trailer. The dump body is pivotally coupled to the chassis weldment and configured to move between a lowered position and a raisedposition. The chassis assembly also includes a walking beam assembly coupled to the chassis weldment. The walking beam assembly includes a bogie having a pair of mounting portions for mounting the chassis weldment to the walking beam assembly and a bogie pin extending outwardly from the pair of mounting portions.

[0008] The walking beam assembly also includes a pair of walking beams coupled to the bogie pin. Each walking beam is positioned outwardly from a respective mounting portion of the pair of mounting portion. Each walking beam has an aperture for receiving the bogie pin to couple the bogie to the walking beams. The walking beam assembly also includes a pair of subassemblies independently coupled to the bogie. Each subassembly has an axle extending transverse to the walking beams; a pair of tower springs coupled to opposed ends of each of the axles and extending upwardly from the axles to couple to a respective end of one of the walking beams; a pair of support members coupled to and extending from opposed ends of the axle, the pair of support members extending outwardly from the axle and towards each other to meet at a bushing sleeve of the chassis frame; and a spherical bushing housed in the bushing sleeve, the spherical bushing including a chassis pin extending outwardly from the bushing sleeve, the chassis pin being coupled to the bogie.

[0009] In accordance with a broad aspect, a chassis assembly for a trailer is described herein. The chassis assembly includes a chassis weldment configured to support a body of the trailer. The chassis assembly also includes a walking beam assembly coupled to the chassis weldment. The walking beam assembly includes a bogie having a pair of mounting portions for mounting the chassis weldment to the walking beam assembly and a bogie pin extending outwardly from the pair of mounting portions.

[0010] In at least one embodiment, the bogie includes a pair of depending portions that are each coupled to the cross beam and extend downwardly from the cross beam to couple to the chassis pin.

[0011] In at least one embodiment, each bogie pin includes a first portion adjacent to one of the mounting portions and a second portion extending outwardly from the first portion.

[0012] In at least one embodiment, the walking beam assembly also includes a first conical bushing configured to cover the first portion of the bogie pin when the bogie pin is received within the aperture of the walking beam.

[0013] In at least one embodiment, the walking beam assembly also includes a second conical bushing configured to cover the second portion of the bogie pin when the bogie pin is received within the aperture of the walking beam.

[0014] In at least one embodiment, the first conical bushing and / or the second conical bushing are made of a rubber material.

[0015] In at least one embodiment, the spherical bushing is made of a rubber material.

[0016] In at least one embodiment, the bushing sleeve includes a first portion configured to receive the support members.

[0017] In at least one embodiment, the bushing sleeve includes a second portion configured to house the spherical bushing.

[0018] In accordance with a broad aspect, a dump trailer is described herein. The dump trailer has a chassis assembly according to at least one embodiment described herein.

[0019] These and other features and advantages of the present application will become apparent from the following detailed description taken together with the accompanying drawings. It should be understood, however, that the detailed description and the specific examples, while indicating preferred embodiments of the application, are given by way of illustration only, since various changes and modifications within the spirit and scope of the application will become apparent to those skilled in the art from this detailed description.Brief Description of the Drawings

[0020] For a better understanding of the various embodiments described herein, and to show more clearly how these various embodiments may be carried into effect, reference will be made, by way of example, to the accompanying drawings which showat least one example embodiment, and which are now described. The drawings are not intended to limit the scope of the teachings described herein.

[0021] FIG. 1 A is a perspective view from above of a dump trailer, according to at least one embodiment described herein.

[0022] FIG. 1 B is a perspective view from below of the dump trailer of FIG. 1 A.

[0023] FIG. 1 C is a perspective view from above of the dump trailer of FIG. 1 A with the dump box in a raised position.

[0024] FIG. 2A is a top down view of the undercarriage of FIG. 1 A.

[0025] FIG. 2B is a rear cross-sectional view along the of the undercarriage of FIG.2A along the line A-A therein.

[0026] FIG. 3 is a perspective view from above of the walking beam assembly of the dump trailer of FIG. 1 A..

[0027] FIG. 4A is a perspective view from above of the walking beam assembly of the dump trailer of FIG. 1 A with the tires removed.

[0028] FIG. 4B is a partial exploded view of the walking beam assembly of FIG. 4A.

[0029] FIG. 40 is a perspective view from below of the walking bam assembly of FIG. 4A.

[0030] FIG. 4D is a bottom view of the walking beam assembly of FIG. 4A.

[0031] FIG. 4E is a side view of the walking beam assembly of FIG. 4A.

[0032] FIG. 4F is a front view of the walking beam assembly of FIG. 4A.

[0033] Further aspects and features of the example embodiments described herein will appear from the following description taken together with the accompanying drawings.Detailed Description

[0034] Various systems, devices and methods are described below to provide an example of at least one embodiment of the claimed subject matter. No embodiment described below limits any claimed subject matter and any claimed subject matter maycover systems, devices and methods that differ from those described below. The claimed subject matter are not limited to systems, devices and methods having all of the features of any one systems, device or method described below or to features common to multiple or all of the systems, devices and methods described below. It is possible that a system, device or method described below is not an embodiment of any claimed subject matter. Any subject matter that is disclosed in a system, device or method described herein that is not claimed in this document may be the subject matter of another protective instrument, for example, a continuing patent application, and the applicant(s), inventor(s) and / or owner(s) do not intend to abandon, disclaim, or dedicate to the public any such invention by its disclosure in this document.

[0035] Furthermore, it will be appreciated that for simplicity and clarity of illustration, where considered appropriate, reference numerals may be repeated among the figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the example embodiments described herein. However, it will be understood by those of ordinary skill in the art that the example embodiments described herein may be practiced without these specific details. In other instances, well-known methods, procedures, and components have not been described in detail so as not to obscure the example embodiments described herein. Also, the description is not to be considered as limiting the scope of the example embodiments described herein.

[0036] It should be noted that terms of degree such as "substantially", "about" and "approximately" as used herein mean a reasonable amount of deviation of the modified term such that the end result is not significantly changed. These terms of degree should be construed as including a deviation of the modified term, such as 1 %, 2%, 5%, or 10%, for example, if this deviation does not negate the meaning of the term it modifies.

[0037] Furthermore, the recitation of any numerical ranges by endpoints herein includes all numbers and fractions subsumed within that range (e.g. 1 to 5 includes 1 , 1.5, 2, 2.75, 3, 3.90, 4, and 5). It is also to be understood that all numbers and fractions thereof are presumed to be modified by the term "about" which means a variation up to acertain amount of the number to which reference is being made, such as 1 %, 2%, 5%, or 10%, for example, if the end result is not significantly changed.

[0038] The following description is not intended to limit or define any claimed or as yet unclaimed subject matter. Subject matter that may be claimed may reside in any combination or sub-combination of the elements or process steps disclosed in any part of this document including its claims and figures. Accordingly, it will be appreciated by a person skilled in the art that an apparatus, system or method disclosed in accordance with the teachings herein may embody any one or more of the features contained herein and that the features may be used in any particular combination or sub-combination that is physically feasible and realizable for its intended purpose.

[0039] Recently, there has been a growing interest in developing new and improved undercarriage systems for trailers. Herein, various embodiments of undercarriage systems for trailers are described. It should be understood that the term “trailer” is used herein to describe unpowered vehicles suitable to be towed by another vehicle. Trailers may include unpowered vehicles to be towed by automobiles (i.e., road vehicles) as well as trailed implements for agricultural applications, which are hitched, trailing implements that are often towed by a tractor (or other off-road vehicle) and free to rotate about a hitch point.

[0040] Referring now to FIG. 1A, shown therein is a perspective view from above of a dump trailer 100. Dump trailer 100 includes a dump body 102 coupled to a chassis assembly 104, which is visible in FIG. 1 B. Herein, the term “chassis” or “chassis assembly” is intended to refer to a wheeled supporting frame that is under the body of a trailer, including but not limited to a dump trailer as shown in the figures.

[0041] Although a dump trailer is shown in FIG. 1 ., it should be understood that the trailers described here should not be limited to dump trailers. The chassis assemblies described herein may also be used with trailers that do not include a dump body.

[0042] Dump body 102 has a front end 102a and a rear end 102b. Similarly, chassis assembly 104 has a front end 104a and a rear end 104b. As shown in FIG. 1 C, rear end 102b of dump body 102 is pivotally coupled to rear end 104b of chassis assembly 104. In the embodiment shown in the drawings, dump body 102 is pivotally coupled tochassis assembly 104 by pins 106, and more specifically two pins 106 spaced apart from each other. It should be understood that rear end 102b of dump body 102 should not be limited to being pivotally coupled to rear end 104b of chassis assembly 104 by two pins 106. Dump trailer 100 also includes a lift mechanism 108 to raise and lower front end 102a of dump body 102 relative to front end 104a of chassis assembly 104. In FIG. 1 C, the lift mechanism 108 is shown as a single telescoping cylinder, however, lift mechanism 108 should not be limited to being the single telescoping cylinder shown. Other mechanisms for raising and lowering front end 102a of dump body 102 relative to front end 104a of chassis assembly 104 would not deviate from the teachings herein. Chassis assembly 104 is supported above the ground by tires 110.

[0043] Turning now to FIG. 2A, shown therein is a top view of chassis assembly 104. Chassis assembly 104 includes a chassis weldment 112, a walking beam assembly 114 (shown in FIG. 2B) and an attachment mechanism 116 for coupling the dump trailer 100 to a vehicle. Each of these components is described in greater detail below.

[0044] Chassis weldment 112 is a base frame of the dump trailer 100 that supports the dump body 102 above ground. Dump body 102 is pivotally mounted to chassis weldment 112. Chassis weldment 112 supports lift mechanism 108 and pins 106 such that lift mechanism 108 raises and lowers front end 102a of dump body 102 relative to chassis weldment 112 about pins 106.

[0045] FIG. 2B shows a rear cross sectional view of the dump trailer along the line A-A shown in FIG. 2A. FIG 2B shows various components of the walking beam assembly 114 and chassis weldment 112. FIG. 3 shows a perspective view from above of the walking beam assembly 114 with four tires 110 attached thereto.

[0046] Waking beam assembly 114 isolates the chassis weldment 112 and the dump body 102 thereon from road inputs and helps to maintain contact between the tires 110 and the ground thus ensuring good traction at all times. Walking beam assembly 114 includes at least a bogie 116 that is coupled to walking beams 128, a pair of axles 152 each supporting two wheels 154, and a spherical bushing 156 connecting the axles 152 to the bogie 114.

[0047] Walking beam assembly 114 is shown in greater detail in FIG. 4A, which is a perspective view from above. Bogie 116 of walking beam assembly 114 includes at least one mounting portion 120 for mounting the walking beam assembly 114 to chassis 112. Mounting portion 120 is configured to be secured to an underside of chassis 112, for example by a plurality of bolts. In the embodiments shown in the drawings, bogie 116 includes two mounting portions 120a, 120b. Mounting portions 120a, 120b can be seen in FIG. 3 as well as in FIG. 4A.

[0048] Each of mounting portions 120a, 120b extends upwardly from a cross beam 122 of bogie 116. Each mounting portion 120a, 120b includes a respective mounting plate121 that directly couples to an underside of chassis 112. In the example shown in the drawings, mounting plate 121 provides a flat, horizontal surface for mounting bogie 116 to chassis 112. However, it should be understood that other shapes and arrangements may be used and mounting portions 120a, 120b and mounting plates 121 should not be limited to the shapes shown in the figures herein. Mounting portions 120a, 120b may also include one or more supporting flanges 123 that support the mounting plate 121 on the cross beam 122.

[0049] Cross beam 122 extends laterally across bogie 116. Cross beam 122 is fixedly coupled (e.g. welded) to each of the mounting portions 120a, 120b. Cross beam122 may extend beyond each of the mounting portions 120a, 120b for coupling to the walking beams 128a and 128b.

[0050] A respective bogie pin 126 extends outwardly from each of the mounting portions 120a, 120b in a same direction as a longitudinal axis of the cross beam 122. This is shown in FIG. 4B, where walking beam 128b is shown in an exploded view and bogie pin 126 is shown extending outwardly from second mounting portion 120b. Although the bogie pin 126 is shown in the drawings as being colinear with cross beam 122, it should be understood that bogie pin 126 is not required to be colinear with cross beam 122. Rather, in some embodiments, cross beam 122 may be eliminated and bogie pin 126 may extend across a width of bogie 116. Generally, bogie pin 126 extends in a direction that is parallel to a longitudinal axis of the cross beam 122.

[0051] To assemble each walking beam 128a, 128b onto the bogie pin 126, a first conical bushing 127 is first placed on bogie pin 126 to cover a first portion 126a of the bogie pin 126. Walking beam 128b is then slid over the first conical bushing 127 such that the first conical bushing 127 is received in an aperture 129 of the walking beam 128b. A second conical bushing 130 is then placed over a second portion 126b of bogie pin 126 within aperture 129 of walking beam 128b. In the example shown, second portion 126b of bogie pin 126 has a smaller diameter than first portion 126a of bogie pin 126. An outer bogie pin 131 is then placed on and secured to the second portion 126b of bogie pin 126, for example by a fastener 133.

[0052] Although not specifically shown in the drawings, the components and process for assembling the first walking beam 128a and coupling the first walking beam 128a to the cross beam 122 are the same as described herein for coupling the second walking beam 128b to the cross beam 122.

[0053] It should be understood that the first conical bushing 127 and the second conical bushing 130 are made of a rubber or another compressible material. Accordingly, first conical bushing 127 and the second conical bushing 130 provide for movement of the first walking beam 128a and the second walking beam 128b relative to the cross beam 122.

[0054] Also shown in FIG. 4B is a pair of depending portions 134 that extend downwardly from the cross beam 122 to couple the bogie 116 to a spherical bushing 156 of the walking beam assembly 114 (depending portions 134 are described in greater detail below).

[0055] Walking beams 128a and 128b are parallel with each other. Walking beams 128a and 128b each have a first end 135 and a second end 137. First end 135 and second end 137 of each walking beam 128a and 128b is coupled to a tower spring 130. Accordingly, as shown in the drawings, the walking beam assembly 114 shown therein includes four tower springs 130. The tower springs 130 stabilize the walking beams 128a, 128b as the wheels (described below) move upwardly and / downwardly in response to the dump trailer 100 passing over rough terrain. More specifically, the tower springs 130provide for independent vertical movement of wheels 154 and constant ground contact of tires 110.

[0056] Each of the four tower springs 130 is coupled a first end 135 or a second end 137 of one of the walking beams 128a and 128b to chassis 150. For example, in the embodiment shown in the drawings, each tower spring 130 has a plurality of holes 132 in a top portion 136 thereof. On the bottom side of each walking beam 128 there is a plate 139 having a matching pattern of a plurality of holes therein. The walking beam 128 and tower spring 130 can be bolted together with bolts passing through the plurality of holes.

[0057] Turning to FIG. 4C, shown therein is a perspective view from below of walking beam assembly 114. As shown therein, walking beam assembly 114 also includes a pair of axles 152, each being coupled to a pair of support members 153. Together, the each axle 152 and each pair of support members 153 form a subassembly 151 such that the walking beam assembly has two subassemblies 151. Each subassembly 151 is independently coupled to the bogie 116. Herein, the term “independently coupled” means that the chassis frames are coupled to the bogie in a manner such that movement of one of the chassis frames is independent from movement of the other chassis frame, such that movement of one of the chassis frames does not impart movement onto the other chassis frame.

[0058] Each subassembly 151 generally has an A-shape including an axle 152 and a pair of support members 153. Each of the axles 152 and support members 153 are metal components that are shaped for increasing their strength to support the bogie 116 and the dump body 102.

[0059] Each axle 152 extends transverse to the walking beams 128a and 128b, and may be perpendicular to the walking beams 128a and 128b. Each axle 152 has a first end 152a and a second end 152b. A wheel 154 is couped to each end of each axle 152. A tire 110 can then be coupled to each wheel 154 (see FIG. 1 for tires 110). It should be understood herein that the term “axle” may include a live axle (i.e. one that provides power to the wheels) or a dead axle (one that does not provide power to the wheels). In the examples show in the drawings, both of the axles 152 shown are dead axles of a dump trailer 100.

[0060] As noted above, each subassembly 151 also includes a pair of support members 153 coupled to and extending from opposed ends of the axle 152. Each of the pair of support members 153 are coupled to an opposed end of the axle 152, on a same side of the axle 152. The pair of support members 153 are generally coplanar with the axle 152 and extend outwardly from the axle 152 towards each other. The pair of support members 153 of each subassembly 151 meet under a central portion of the cross beam 122 and are coupled thereto. More specifically, the pair of support members 153 meet and are each coupled to a bushing sleeve 155.

[0061] Bushing sleeve 155 includes a first end 155a that is shaped to couple to each of the frame members 153. Bushing sleeve can be seen in FIGs. 4B and 4D. In the example shown in the drawings, the first end 155a of the bushing sleeve 155 has a cuboid shape, however, it should be understood that the first end 155a of the bushing sleeve 155 should not be limited to being a cuboid shape.

[0062] Bushing sleeve 155 also has a second end 155b that has a spherical shape and is hollow to house a spherical bushing 156 therein. Spherical bushing 156 includes chassis pin 157 that passes through spherical bushing 156. Chassis pin 157 extends outwardly from spherical bushing 156 in a direction that is also generally coplanar with the subassemblies 151. Chassis pin 157 also extends outwardly from spherical bushing 156 in a direction that is generally parallel with a longitudinal axis of the axles 152.

[0063] Referring now to FIGs. 4D and 4E, chassis pin 157 has a first end 157a extending outwardly from a first side 155c of the bushing sleeve 155 and a second end 157b extending outwardly from a second side 155d of the bushing sleeve 155. First end 157a is fastened to a first depending portion 134a and second end 157b is fastened to a second depending portion 134b, each depending portion 134a, 134b being coupled to cross beam 122. For example, in the examples shown herein, each depending portion 134a, 134b is shaped at a top portion 159 thereof to receive at least a portion of cross beam 122. For example, top portion 159 of each of depending portion 134a, 134b has a generally U-shape sized to receive cross beam 122. This can be seen in FIG. 4F.

[0064] Spherical bushing 156 provides for each axle 152 to move up and / or down and to pivot about the chassis pin 157.

[0065] Each subassembly 151 also includes a pair of tower springs 130. Each tower spring 130 of each subassembly151 is coupled to an end 152a, 152b of axle 152. Each of the tower springs 130 extends upwardly from the end 152a, 152b of the axle 152 to couple to a respective end of one of the walking beams 128a, 128b. The tower springs 130 complement the spherical bushing 156 and stabilize the walking beams 128a, 128b when the axle 152 moves up and / or down and to pivot about the chassis pin 157.

[0066] While the applicant's teachings described herein are in conjunction with various embodiments for illustrative purposes, it is not intended that the applicant's teachings be limited to such embodiments as the embodiments described herein are intended to be examples. On the contrary, the applicant's teachings described and illustrated herein encompass various alternatives, modifications, and equivalents, without departing from the embodiments described herein, the general scope of which is defined in the appended claims.

Claims

ClaimsWhat is claimed is:1 . A chassis assembly for a dump trailer, the chassis assembly comprising: a chassis weldment configured to support a dump body of the dump trailer, the dump body being pivotally coupled to the chassis weldment and configured to move between a lowered position and a raised position; and a walking beam assembly coupled to the chassis weldment, the walking beam assembly comprising: a bogie comprising: a pair of mounting portions for mounting the chassis weldment to the walking beam assembly; and a bogie pin extending outwardly from the pair of mounting portions; a pair of walking beams coupled to the bogie pin, each walking beam being positioned outwardly from a respective mounting portion of the pair of mounting portions, each walking beam having an aperture for receiving the bogie pin to couple the bogie to the walking beams; and a pair of subassemblies independently coupled to the bogie, each subassembly comprising: an axle extending transverse to the walking beams; a pair of tower springs coupled to opposed ends of each of the axles and extending upwardly from the axles to couple to a respective end of one of the walking beams; a pair of support members coupled to and extending from opposed ends of the axle, the pair of support members extending outwardly from the axle and towards each other to meet at a bushing sleeve of the chassis frame; and a spherical bushing housed in the bushing sleeve, the spherical bushing including a chassis pin extending outwardly from the bushing sleeve, the chassis pin being coupled to the bogie.

2. The undercarriage system of claim 1 , wherein the bogie includes a pair of depending portions that are each coupled to the cross beam and extend downwardly from the cross beam to couple to the chassis pin.

3. The undercarriage system of claim 1 , wherein each bogie pin includes a first portion adjacent to one of the mounting portions and a second portion extending outwardly from the first portion.

4. The undercarriage system of claim 3, wherein the walking beam assembly further comprises a first conical bushing configured to cover the first portion of the bogie pin when the bogie pin is received within the aperture of the walking beam.

5. The undercarriage system of claim 4, wherein the walking beam assembly further comprises a second conical bushing configured to cover the second portion of the bogie pin when the bogie pin is received within the aperture of the walking beam.

6. The undercarriage system of claim 5, wherein the first conical bushing and / or the second conical bushing are made of a rubber material.

7. The undercarriage system of claim 1 , wherein the spherical bushing is made of a rubber material.

8. The undercarriage system of claim 1 , wherein the bushing sleeve includes a first portion configured to receive the support members.

9. The undercarriage system of claim 8, wherein the bushing sleeve includes a second portion configured to house the spherical bushing.

10. A dump trailer having the chassis assembly of any one of claims 1 to 9.11 .A chassis assembly for a trailer, the chassis assembly comprising: a chassis weldment configured to support a body of the trailer, the body being pivotally coupled on the chassis weldment; and a walking beam assembly coupled to the chassis weldment, the walking beam assembly comprising:a bogie comprising: a pair of mounting portions for mounting the chassis weldment to the walking beam assembly; and a bogie pin extending outwardly from the pair of mounting portions; a pair of walking beams coupled to the bogie pin, each walking beam being positioned outwardly from a respective mounting portion of the pair of mounting portions, each walking beam having an aperture for receiving the bogie pin to couple the bogie to the walking beams; and a pair of subassemblies independently coupled to the bogie, each subassembly comprising: an axle extending transverse to the walking beams; a pair of tower springs coupled to opposed ends of each of the axles and extending upwardly from the axles to couple to a respective end of one of the walking beams; a pair of support members coupled to and extending from opposed ends of the axle, the pair of support members extending outwardly from the axle and towards each other to meet at a bushing sleeve of the chassis frame; and a spherical bushing housed in the bushing sleeve, the spherical bushing including a chassis pin extending outwardly from the bushing sleeve, the chassis pin being coupled to the bogie.

12. The undercarriage system of claim 11 , wherein the bogie includes a pair of depending portions that are each coupled to the cross beam and extend downwardly from the cross beam to couple to the chassis pin.

13. The undercarriage system of claim 11 , wherein each bogie pin includes a first portion adjacent to one of the mounting portions and a second portion extending outwardly from the first portion.

14. The undercarriage system of claim 13, wherein the walking beam assembly further comprises a first conical bushing configured to cover the first portion of the bogie pin when the bogie pin is received within the aperture of the walking beam.

15. The undercarriage system of claim 14, wherein the walking beam assembly further comprises a second conical bushing configured to cover the second portion of the bogie pin when the bogie pin is received within the aperture of the walking beam.

16. The undercarriage system of claim 15, wherein the first conical bushing and / or the second conical bushing are made of a rubber material.

17. The undercarriage system of claim 11 , wherein the spherical bushing is made of a rubber material.

18. The undercarriage system of claim 11 , wherein the bushing sleeve includes a first portion configured to receive the support members.

19. The undercarriage system of claim 18, wherein the bushing sleeve includes a second portion configured to house the spherical bushing.

20. A trailer having the chassis assembly of any one of claims 1 to 19

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