Off-highway dump truck ring beam structure

Abstract

The application discloses a non-highway dump truck ring beam structure, which comprises an upper ring beam, a middle support body and a lower ring beam combined together to form an overall box type closed structure together with a vehicle frame longitudinal beam, and the shape is similar to a letter O type; the upper ring beam is connected with the middle support body through bolts; the middle support body is nested on the vehicle frame longitudinal beam; the lower part of the middle support body is welded with the lower ring beam; the upper ring beam is a box type welded structure and is detachable, so that the upper part rigidity of the ring beam is improved, and the installation and maintenance of a power assembly are facilitated; the middle support body and the lower ring beam are integrally embedded on a downward inclined surface of the vehicle frame main longitudinal beam, so that the gravity center of the front end of the vehicle can be lowered; the vehicle frame main longitudinal beam does not need to be disconnected, and the cracking risk is greatly reduced; meanwhile, functions such as a front suspension cylinder support, a front steering bridge horizontal pushing seat, a vehicle body system and a walking platform support are integrated, the process is simple, the cost is low, the rigidity and the strength are good, and the manufacturing efficiency is high.

Description

Technical Field

[0001] This invention belongs to the field of engineering machinery and transportation technology, and relates to the ring beam structure of off-highway dump trucks. Background Technology

[0002] The ring beam of an off-highway dump truck is one of the most complex components in terms of structure and stress. In addition to ensuring sufficient rigidity and strength, the overall height must take into account the engine installation and maintenance space and the height of the supported walkway, while also considering the ground clearance of the engine and transmission, the cylinder stroke of the front suspension, etc. The width must be sufficient to support and protect the powertrain without interfering with the front axle.

[0003] There are two main types of existing ring beam structures. One type is made of high-strength steel plates welded together and then welded to the front beam and rear longitudinal beam of the frame. This structure has the risk of cracking at the weld joint between the longitudinal beam and the ring beam, and the center of gravity is relatively high. The other type of structure uses cast steel as the entire ring beam to ensure its strength and reliability. However, due to the consideration of casting cost and cycle, the cast steel structure is often not too complex. This results in the need for secondary welding of functional supports such as the front suspension cylinder support, the front steering axle pusher, the body system and the walkway support. This is inefficient and difficult to repair after partial failure. Summary of the Invention

[0004] The purpose of this invention is to provide a ring beam structure for off-highway dump trucks, which solves the problems of easy cracking and poor performance in the prior art.

[0005] The technical solution adopted in this invention is a ring beam structure for off-highway dump trucks, comprising an upper ring beam, a middle support body, and a lower ring beam, which together with the longitudinal beams of the vehicle frame form an integral box-shaped closed structure, resembling the letter O. The upper ring beam and the middle support body are bolted together, the middle support body is nested on the longitudinal beams of the vehicle frame, and the lower part of the middle support body is welded to the lower ring beam.

[0006] The invention is further characterized in that,

[0007] The upper ring beam includes an outer side plate that arches upward in the middle, and an inner side plate is set below the outer side plate. The outer side plate and the inner side plate are arched upward as a whole. Connecting plates are horizontally welded to the bottom of both sides of the outer side plate and the inner side plate. Vertical plates a are set along both sides of the width of the outer side plate and the inner side plate. The outer side plate, the inner side plate, the vertical plates a and the connecting plates are welded to form a box-shaped structure.

[0008] The intermediate support includes two vertically arranged base plates a. Welding holes are opened around the perimeter and center of the base plates a. The base plates a are fully welded to the longitudinal beams of the frame through the welding holes. A front end plate and a rear end plate are set above one side of the base plates a welded to the longitudinal beams of the frame. The front end plate and the rear end plate are matched and welded to the longitudinal beams of the frame. A side end plate is welded between the front end plate and the rear end plate.

[0009] Vertical stiffeners are welded to both sides of the base plate a, and a lower sealing plate is horizontally welded between the two vertical stiffeners. Two suspension cylinder lugs are vertically installed below the lower sealing plate. The cab support or platform support is horizontally welded to the top of the base plate a and the vertical stiffeners. The cab support and platform support have the same structure and are symmetrically installed on the two base plates a. The vertical stiffeners connect the cab support, platform support and base plate a from top to bottom.

[0010] Both the cab support base and the platform support base are equipped with support plates at their bottoms. The support plates are vertically positioned above the lower sealing plate and are located between two vertical stiffening plates. Support stiffening plates are welded onto the support plates. The cab support base and the platform support base are welded to the top of the support stiffening plates. Reinforcing plates are welded to the upper surfaces of the cab support base and the platform support base. Threaded holes are provided on the support plates corresponding to the connecting plates of the upper ring beam.

[0011] The lower ring beam includes a welded base plate b, a vertical plate b, a first reinforcing rib, and a second reinforcing rib. The base plate b is U-shaped, with increased cross-sectional area at both ends and plug weld holes. The base plate b is welded to the lower flange of the frame longitudinal beam and the base plate of the intermediate support body. Vertical plates b are vertically installed on both sides of the width below the base plate b. The vertical plates b and the base plate b are welded to the base plate a. The vertical plates b are provided with thrust rod ball head connecting pin holes. The distance between the two vertical plates b is slightly greater than the thickness of the thrust rod ball head.

[0012] A first reinforcing rib is provided at the bend between the two upright plates b, and a second reinforcing rib is provided at both ends of the two upright plates b. The first reinforcing rib is designed with a groove.

[0013] Outer reinforcing plates are welded to the bends at both ends of the outer side plate, and inner reinforcing plates are welded to the bends at both ends of the inner side plate. A walkway pad is welded to the top of the outer side plate.

[0014] The beneficial effects of this invention are as follows: The off-highway dump truck ring beam structure of this invention is composed of an upper ring beam, a middle support body, and a lower ring beam, which are integrally embedded on the downward inclined surface of the main longitudinal beam of the vehicle frame. This lowers the center of gravity at the front of the vehicle, eliminates complex curved surfaces, and significantly improves the bending and torsional resistance at this location. Furthermore, the longitudinal beams of the vehicle frame do not need to be broken, which can effectively improve the reliability of the vehicle frame. It can be manufactured separately by welding or as a whole by welding, with controllable costs, short production cycle, high efficiency, simple process, low cost, good rigidity and strength, and high manufacturing efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the off-highway dump truck ring beam structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the upper ring beam structure of the off-highway dump truck ring beam structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the intermediate support structure of the off-highway dump truck ring beam structure of the present invention;

[0018] Figure 4 This is a schematic diagram of the lower ring beam structure of the off-highway dump truck ring beam structure of the present invention;

[0019] Figure 5 This is a schematic diagram of the bottom plate b structure of the lower ring beam of the off-highway dump truck ring beam structure of the present invention;

[0020] Figure 6 This is a schematic diagram of the first reinforcing rib structure in the lower ring beam of the off-highway dump truck ring beam structure of the present invention;

[0021] In the diagram, 1. Upper ring beam, 101. Outer side plate, 102. Walkway pad, 103. Inner reinforcing plate, 104. Inner side plate, 105. Vertical plate a, 106. Connecting plate, 107. Outer reinforcing plate, 2. Intermediate support body, 201. Cab support seat, 202. Platform support seat, 203. Front sealing plate, 204. Side sealing plate, 205. Rear sealing plate, 206. Vertical stiffener plate, 207. Bottom plate a, 208. Suspension cylinder ear plate, 209. Lower sealing plate, 210. Support plate, 211. Support stiffener plate, 212. Reinforcing plate, 3. Lower ring beam, 301. Bottom plate b, 302. Vertical plate b, 303. First reinforcing rib, 304. Second reinforcing rib. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0023] Example 1

[0024] This invention relates to a non-highway dump truck ring beam structure, such as... Figure 1 As shown, the structure comprises an upper ring beam 1, a middle support 2, and a lower ring beam 3, which, together with the longitudinal beams of the frame, form an integral box-shaped closed structure resembling the letter O, exhibiting high strength and rigidity. The upper ring beam 1 and the middle support 2 are connected by high-strength bolts, serving to support the walkway. The middle support 2 is nested on the longitudinal beams of the frame; its upper part is bolted to the upper ring beam 1, and its lower part is welded to the lower ring beam 3, supporting the body system and transmitting impact loads from the suspension cylinders. The lower ring beam 3, welded to the middle support 2, has a U-shaped cross-section and connects to the axle's lateral thrust rod, bearing the axle's lateral force. The ring beams are welded to the downward-sloping surface of the main longitudinal beams of the frame, lowering the center of gravity of the front cab and supporting the walkway, thus improving vehicle stability. The ring beams are integrally embedded in the main longitudinal beams of the frame, eliminating the need to disconnect the main longitudinal beams and significantly reducing the risk of cracking.

[0025] Example 2

[0026] like Figure 2As shown, the upper ring beam 1 includes an outer side plate 101 that arches upwards in the middle, and an inner side plate 104 below the outer side plate 101. The outer side plate 101 and the inner side plate 104 are arched upwards as a whole, which provides good stress distribution and also reserves space for the powertrain arrangement. Connecting plates 106 are horizontally welded to the bottom sides of the outer side plate 101 and the inner side plate 104. Vertical plates a105 are provided along both sides of the width of the outer side plate 101 and the inner side plate 104. The outer side plate 101, the inner side plate 104, the vertical plates a105, and the connecting plates 106 are welded to form a box-shaped structure. Outer reinforcing plates 107 are welded at the bends at both ends of the outer side plate 101, and inner reinforcing plates 103 are welded at the bends at both ends of the inner side plate 104 to reinforce the structure against stress concentration caused by bending and prevent early cracking. A walkway pad 102 is welded to the top of the outer side plate 101.

[0027] like Figure 3 As shown, the intermediate support 2 includes two vertically arranged base plates a207. Welding holes are provided around the perimeter and center of the base plates a207. The base plates a207 are fully welded to the longitudinal beams of the frame through these welding holes, effectively increasing the welding area and preventing "hollow" failure caused by insufficient contact between the base plates and the web of the longitudinal beams when bearing complex loads. A front sealing plate 203 and a rear sealing plate 205 are provided above one side of the welded longitudinal beams of the frame on the base plates a207. The front sealing plates 203 and 205 are matched and welded to the longitudinal beams of the frame, and a side sealing plate 204 is welded between the front sealing plates 203 and 205.

[0028] Vertical stiffener plates 206 are welded to both sides of the base plate a207. A lower sealing plate 209 is horizontally welded between the two vertical stiffener plates 206. Two suspension cylinder ear plates 208 are vertically installed below the lower sealing plate 209. A cab support seat 201 or a platform support seat 202 is horizontally welded to the top of the base plate a207 and the vertical stiffener plates 206. The cab support seat 201 and the platform support seat 202 have the same structure and are symmetrically arranged on the two base plates a207. The vertical stiffener plates 206 connect the cab support seat 201, the platform support seat 202 and the base plate a207 from top to bottom.

[0029] Both the cab support 201 and the platform support 202 have support plates 210 at their bottom. The support plates 210 are vertically positioned above the lower sealing plate 209 and are located between two vertical stiffener plates 206. Support stiffener plates 211 are welded to the support plates 210, and the cab support 201 and platform support 202 are welded to the top of the support stiffener plates 211. Reinforcing plates 212 are welded to the upper surfaces of the cab support 201 and platform support 202. The support plates 210 have threaded holes corresponding to the connecting plate 106 of the upper ring beam 1 for easy disassembly and assembly of the upper ring beam. The cab support 201 and platform support 202 are welded together as a whole with the support plates 210, vertical stiffener plates 206, front sealing plate 203, rear sealing plate 205, side sealing plate 204, lower sealing plate 209, floor plate a207, and upper flange of the frame longitudinal beam. The intermediate support 2 is welded to the longitudinal beam of the frame to form a whole, which effectively buffers the impact of the single point load of the front suspension cylinder on the frame and makes the force distribution more even.

[0030] Example 3

[0031] like Figure 4 As shown, the lower ring beam 3 includes a welded base plate b301, a vertical plate b302, a first reinforcing rib 303, and a second reinforcing rib 304; as Figure 5 As shown, the base plate b301 is U-shaped, with increased cross-sectional area at both ends and equipped with plug weld holes. The base plate b301 is welded to the lower flange of the frame longitudinal beam and the base plate of the intermediate support body. Vertical plates b302 are vertically installed below the base plate b301 along both sides of its width. The vertical plates b302 and the base plate b301 are welded to the base plate a207 of the intermediate support body 2. The vertical plates b302 have thrust rod ball joint connecting pin holes. The distance between the two vertical plates b302 is slightly greater than the thickness of the thrust rod ball joint. A first reinforcing rib plate 301 is provided at the bend between the two vertical plates b302, and a second reinforcing rib plate 302 is provided at both ends of the two vertical plates b302. Figure 6 As shown, the first reinforcing rib plate 301 has a slot design to prevent interference with the transverse thrust rod when it moves up and down.

[0032] The working principle of the off-highway dump truck ring beam structure of this invention is as follows: the invention consists of an upper ring beam 1, a middle support 2, and a lower ring beam 3, forming a box-shaped section resembling the letter O, resulting in high strength and rigidity. It is integrally embedded on the downward-sloping surface of the main longitudinal beam of the vehicle frame, lowering the vehicle's front center of gravity and creating space for other assemblies. The main longitudinal beam of the frame does not need to be disconnected, significantly reducing the risk of cracking. It integrates the functions of the front suspension cylinder lug 208, the front steering axle thrust seat, the body system, and the walkway support into one unit. The upper ring beam 1 is detachable, facilitating powertrain installation and maintenance.

[0033] This invention relates to a ring beam structure for off-highway dump trucks. The ring beam and the longitudinal beams of the frame form an O-shaped closed box section, significantly improving the bending and torsional resistance at this point. Furthermore, the longitudinal beams of the frame do not need to be disconnected, effectively enhancing the reliability of the frame. Simultaneously, it integrates the functions of the front suspension cylinder lug 208, the front steering axle thrust seat, the body system, and the walkway support into one unit. The process is simple, low-cost, with good rigidity and strength, and high manufacturing efficiency, making it suitable for mass production applications. The three parts constituting the ring beam structure—the upper ring beam 1, the intermediate support 2, and the lower ring beam 3—are all welded from low-alloy high-strength plates. Without complex curved surfaces, they can be manufactured separately or as a whole, resulting in controllable costs, short production cycles, and high efficiency.

Claims

1. A ring beam structure for off-highway dump trucks, characterized in that, The upper ring beam (1), the middle support body (2) and the lower ring beam (3) are combined and together with the longitudinal beam of the frame, they form an integral box-shaped closed structure, which is shaped like the letter O. The upper ring beam (1) and the middle support body (2) are connected by bolts. The middle support body (2) is nested on the longitudinal beam of the frame. The lower part of the middle support body (2) is welded to the lower ring beam (3). The upper ring beam (1) includes an outer side plate (101) that arches upward in the middle, and an inner side plate (104) is provided below the outer side plate (101). The outer side plate (101) and the inner side plate (104) are arched upward as a whole. Connecting plates (106) are horizontally welded to the bottom of both sides of the outer side plate (101) and the inner side plate (104). Vertical plates a (105) are provided along both sides of the width of the outer side plate (101) and the inner side plate (104). The outer side plate (101), the inner side plate (104), the vertical plate a (105) and the connecting plates (106) are welded to form a box-shaped structure. The intermediate support (2) includes two vertically arranged base plates a (207). The base plates a (207) have plug welding holes around their perimeter and in the middle. The base plates a (207) are fully welded to the longitudinal beams of the frame through the plug welding holes. A front sealing plate (203) and a rear sealing plate (205) are provided above one side of the base plates a (207) where the longitudinal beams of the frame are welded. The front sealing plate (203) and the rear sealing plate (205) are matched and welded to the longitudinal beams of the frame. A side sealing plate (204) is welded between the front sealing plate (203) and the rear sealing plate (205). Vertical stiffener plates (206) are welded on both sides of the base plate a (207), and a lower sealing plate (209) is horizontally welded between the two vertical stiffener plates (206). Two suspension cylinder ear plates (208) are vertically arranged below the lower sealing plate (209). A cab support seat (201) or a platform support seat (202) is horizontally welded to the top of the base plate a (207) and the vertical stiffener plates (206). The cab support seat (201) and the platform support seat (202) have the same structure and are symmetrically arranged on the two base plates a (207). The vertical stiffener plates (206) connect the cab support seat (201), the platform support seat (202) and the base plate a (207) from top to bottom. Both the cab support seat (201) and the platform support seat (202) are provided with support plates (210) at their bottoms. The support plates (210) are vertically positioned above the lower sealing plate (209) and are located between two vertical stiffener plates (206). Support stiffener plates (211) are welded onto the support plates (210). The top of the support stiffener plates (211) is welded to the cab support seat (201) and the platform support seat (202). Reinforcing plates (212) are welded to the upper surfaces of the cab support seat (201) and the platform support seat (202). The support plates (210) are provided with threaded holes corresponding to the connecting plate (106) of the upper ring beam (1). The lower ring beam (3) includes a welded base plate b (301), a vertical plate b (302), a first reinforcing rib (303), and a second reinforcing rib (304); the base plate b (301) is U-shaped, the cross-sectional area of ​​the two ends of the base plate b (301) is increased and plug welding holes are provided, the base plate b (301) is welded to the lower flange of the frame longitudinal beam and the base plate of the intermediate support body respectively, the vertical plate b (302) is vertically set on both sides of the width below the base plate b (301), the vertical plate b (302) and the base plate b (301) are welded to the base plate a (207), the vertical plate b (302) is provided with a thrust rod ball head connecting pin hole, and the distance between the two vertical plates b (302) is slightly greater than the thickness of the thrust rod ball head; A first reinforcing rib (303) is provided at the bend between the two upright plates b (302), and a second reinforcing rib (304) is provided at both ends of the two upright plates b (302). The first reinforcing rib (303) is designed with a groove. The outer reinforcing plate (107) is welded at both ends of the outer side plate (101), the inner reinforcing plate (103) is welded at both ends of the inner side plate (104), and the walkway pad (102) is welded to the top of the outer side plate (101).

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