Split detachable beam structure for truck frame

Abstract

The utility model discloses truck frame split type detachable crossbeam structure relates to truck frame crossbeam technical field, including U shape crossbeam main part, U shape connecting plate and U shape fixed plate, the both ends of crossbeam main part are inserted in the connecting plate first accommodating cavity, and the upper and lower end surface of connecting plate is equipped with through -hole group, the second accommodating cavity in crossbeam main part is equipped with fixed plate, and fixed plate convex sets up connecting screw rod and turns first nut, the bolt is arranged in the through -hole, and the screw rod passes connecting plate, crossbeam main part, fixed plate in proper order, and the screw rod turns second nut between crossbeam main part and fixed plate, and the axial movement of bolt is limited by two -way extrusion second nut. When the specific implementation can add inverted U shape bending plate, and its left plate is connected accommodating cavity inner wall through C shape deformation plate, and right plate is pasted crossbeam main part and is fixed with connecting screw rod. This structure solves the problem of existing crossbeam riveting and inconvenient disassembly, can also disperse load, buffer lateral force, and improves the structure stability under the heavy load jolt working condition.

Description

Technical Field

[0001] This utility model relates to the field of truck frame crossbeam technology, and in particular to a split-type detachable crossbeam structure for truck frames. Background Technology

[0002] In practical applications of split-type detachable crossbeams in truck frames, the mainstream structure is as follows: U-shaped connecting plates are symmetrically mounted on both sides of the main body of the U-shaped crossbeam. The cross-section of the connecting plates is trapezoidal when viewed from above, and the upper and lower ends of the connection are rigidly connected by riveting. The core advantage of this design is that the rigid connection can stably bear the vertical load under heavy loads, and rivets are less likely to loosen due to vibration than bolts. However, under the conditions of long-term heavy-load and bumpy road conditions for trucks, such as dirt roads in mining areas and rural trails, the following defects are exposed: Firstly, assembly and maintenance are inconvenient. Riveting is a semi-permanent connection. When the crossbeam needs to be replaced or the chassis accessories need to be repaired, special tools are required to cut / knock out the rivets. This operation is not only time-consuming, but also easily scratches the end face of the connecting plate or enlarges the rivet holes of the crossbeam, leading to secondary failure of the components. Moreover, there is no auxiliary positioning during assembly. The U-shaped crossbeam is prone to skew after being inserted into the connecting plate, and the alignment of the rivet holes requires repeated adjustments, affecting efficiency.

[0003] Secondly, stress concentration and superposition lead to overload on the rigid connection between the upper and lower surfaces. Although the rigid connection between the upper and lower surfaces can withstand vertical loads, trucks experience more than just vertical forces during operation: driving over potholes generates "vertical impact + lateral pushing and pulling forces," and sudden braking generates "horizontal inertial forces." These lateral / impact components cannot be absorbed by the rigid connection and are all superimposed on the riveting area. Ultimately, all the loads (vertical + lateral + impact) are concentrated in the upper and lower rivet holes. Under heavy loads, the stress can reach 75%-80% of the material's yield strength. Under long-term cycling, rivet shear failure or fatigue cracks around the holes are likely to occur.

[0004] Third, the lack of lateral buffering exacerbates wear on the rigid upper and lower connections. In the existing structure, the rigid upper and lower connections are in direct contact with each other, and there is no release path for the lateral / impact force components—they either bear the force against the rivets (accelerating failure) or the upper and lower mating surfaces of the beam and the connecting plate wear due to continuous rigid friction, resulting in a larger mating gap and further weakening the load-bearing stability of the rigid upper and lower connections. Utility Model Content

[0005] To address the aforementioned problems, the purpose of this utility model is to provide a split-type detachable crossbeam structure for truck frames, which solves the problem that existing split-type detachable crossbeams require destructive disassembly due to riveting and lack of practical ease of assembly and disassembly.

[0006] The technical solution of this utility model is as follows: The truck frame features a split, detachable crossbeam structure, including a U-shaped crossbeam body. U-shaped connecting plates are symmetrically mounted at both ends of the crossbeam body. The two ends of the crossbeam body are inserted into the first accommodating cavity of the connecting plates, achieving initial positioning through insertion. The upper and lower end faces of the connecting plates are symmetrically provided with two rows of through holes corresponding to the crossbeam body. Each row of through holes contains two spaced-apart through holes, providing an installation base for bolt connections.

[0007] The second accommodating cavity of the crossbeam body is provided with a U-shaped fixing plate. The opening direction of the fixing plate is consistent with the opening direction of the crossbeam body to ensure structural adaptability. A connecting screw protrudes from the side of the fixing plate away from the opening end. The connecting screw passes through the crossbeam body and is screwed with a first nut.

[0008] Each of the through holes is fitted with a bolt. The bolt thread passes through the connecting plate, the crossbeam body, and the fixing plate in sequence. A second nut is screwed onto the bolt between the crossbeam body and the fixing plate. The second nut abuts against the crossbeam body and the fixing plate simultaneously. The bidirectional compression of the second nut by the crossbeam body and the fixing plate restricts the axial movement of the bolt and solves the problem of bolt loosening and slippage.

[0009] Furthermore, the fixing plate includes a first upper plate and a first lower plate spaced parallel to each other, and a first vertical plate connecting the two and arranged vertically. The first upper plate and the first lower plate are respectively provided with two guide slots with corresponding through hole groups. The first vertical plate is provided with vertical clearance slots symmetrically along its height direction, and the clearance slots are connected to the guide slots. The length of the clearance slots is greater than the length of the screw in the second accommodating cavity to avoid interference between the screw and the fixing plate and ensure smooth assembly.

[0010] Furthermore, the width of the end of the clearance groove away from the guide groove is greater than that of the end closer to the guide groove, and the top view of the clearance groove is V-shaped. The flared structure reduces the difficulty of screw alignment and improves assembly efficiency. The connecting screw consists of two spaced-apart screws, both located on the first vertical plate between the two rows of guide grooves, so that the fixing plate is subjected to uniform force and avoids local stress concentration from affecting the anti-loosening stability.

[0011] The beneficial effects of this utility model are as follows: 1. In this utility model, the bolt thread passes through the connecting plate, the crossbeam body and the fixing plate in sequence. A second nut is screwed on the bolt between the crossbeam body and the fixing plate. The second nut abuts against the crossbeam body and the fixing plate at the same time, which can restrict the axial movement of the bolt through bidirectional compression. During disassembly, there is no need to destructively disassemble the rivets, avoiding secondary damage to the components caused by scratches on the end face of the connecting plate or enlargement of the connecting hole. The bolt will not loosen or slip off due to axial movement caused by vibration, and it is also convenient for disassembly and assembly operations.

[0012] 2. In this utility model, the inverted U-shaped bent plate is connected to the main body of the crossbeam, forming a three-point load-bearing structure of "the upper and lower bolt connection points between the main body of the crossbeam and the connecting plate + the side fixing point between the right plate and the main body of the crossbeam". Vertical and impact loads can be distributed to the bent plate and the main body of the crossbeam through the three points, and will not be concentrated in a single area. The lower end of the left plate is fixed to the inner wall of the second accommodating cavity through the C-shaped deformation plate, and the lower end of the right plate leaves a gap with the inner wall of the second accommodating cavity. The distance from the cross plate to the inner wall of the second accommodating cavity is equal to the gap distance. When subjected to lateral force, the left plate and the cross plate of the bent plate can bend and deform, and the C-shaped deformation plate deforms elastically at the same time, which can bear and buffer the lateral force. Attached Figure Description

[0013] Figure 1 This is the overall left perspective view of this utility model.

[0014] Figure 2 This is the overall right perspective view of the present invention.

[0015] Figure 3 This is a disassembly diagram of the present invention.

[0016] Figure 4 This is a schematic diagram showing the position of the second nut in the assembled state of this utility model.

[0017] Figure 5 This is a schematic diagram of the fixing plate structure of this utility model.

[0018] Reference numerals in the attached drawings: 1. Main body of the crossbeam; 2. Connecting plate; 3. Fixing plate; 3-1. Connecting screw; 3-2. First nut; 3-3. Guide groove; 3-4. Clearance groove; 4. Screw; 4-1. Second nut; 5. Bending plate; 6. Deformation plate. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] like Figure 1-5As shown, the truck frame features a split, detachable crossbeam structure, including a U-shaped crossbeam body 1. U-shaped connecting plates 2 are symmetrically mounted at both ends of the crossbeam body 1. The two ends of the crossbeam body 1 are inserted into the first accommodating cavity of the connecting plates 2, achieving initial positioning through insertion. Two rows of through holes, corresponding to the crossbeam body 1, are symmetrically formed on the upper and lower end faces of the connecting plates 2. Each row of through holes contains two spaced-apart through holes, providing a mounting base for bolt connections. A U-shaped fixing plate 3 is provided within the second accommodating cavity of the crossbeam body 1. The opening direction of the fixing plate 3 is consistent with the opening direction of the crossbeam body 1, ensuring structural compatibility. A connecting screw 3-1 protrudes from the side of the fixing plate 3 away from the opening end. The connecting screw 3-1 passes through the crossbeam body 1 and is screwed with a first nut 3-2. Each of the through holes is fitted with a bolt. The bolt shank 4 passes through the connecting plate 2, the crossbeam body 1, and the fixing plate 3 in sequence. A second nut 4-1 is screwed onto the bolt shank 4 between the crossbeam body 1 and the fixing plate 3. The second nut 4-1 abuts against the crossbeam body 1 and the fixing plate 3 simultaneously. The bidirectional compression of the second nut 4-1 by the crossbeam body 1 and the fixing plate 3 restricts the axial movement of the bolt and solves the problem of bolt loosening and slippage.

[0021] Furthermore, the fixing plate 3 includes a first upper plate, a first lower plate, and a first vertical plate that are parallel to each other and arranged vertically. The first upper plate and the first lower plate each have two corresponding through-hole groups of guide grooves 3-3. The first vertical plate has vertical clearance grooves 3-4 symmetrically arranged along its height direction, and the clearance grooves 3-4 communicate with the guide grooves 3-3. During assembly, the bolt 4 is first passed through the connecting plate 2 and the crossbeam body 1 in sequence. Then, the second nut 4-1 is screwed onto the bolt 4. At this time, the second nut 4-1 is tightly fitted to the inner wall of the crossbeam body 1. Then, the fixing plate 3 is inserted into the second receiving cavity from the open end of the crossbeam body 1. During the insertion process, the bolt 3 is inserted into the second receiving cavity. Align the clearance groove 3-4 with the screw 4, and push the fixing plate 3 inward along the clearance groove 3-4 until the screw 4 slides into the guide groove 3-3, the connecting screw 3-1 fully extends out of the second accommodating cavity, and the first vertical plate is in contact with the inner wall of the crossbeam body 1. At this time, the second nut 4-1 is located between the fixing plate 3 and the crossbeam body 1, with one side abutting against the inner wall of the crossbeam body 1 and the other side abutting against the outer wall of the fixing plate 3. Finally, screw the first nut 3-2 onto the connecting screw 3-1 to complete the fixing of the fixing plate 3, and at the same time complete the axial limiting of the second nut 4-1. The length of the clearance groove 3-4 is greater than the length of the screw 4 in the second accommodating cavity to avoid interference between the screw 4 and the fixing plate 3 and ensure smooth assembly.

[0022] Furthermore, the width of the end of the clearance groove 3-4 away from the guide groove 3-3 is greater than that of the end close to the guide groove 3-3. The top view cross section of the clearance groove 3-4 is V-shaped. The flared structure reduces the difficulty of aligning the screw 4 and improves the assembly efficiency. The connecting screw 3-1 consists of two spaced screws, both located on the first vertical plate between the two rows of guide grooves 3-3, so that the fixing plate 3 is subjected to uniform force and avoids local stress concentration from affecting the anti-loosening stability.

[0023] Furthermore, an inverted U-shaped bent plate 5 is provided on the side of the main beam 1 away from its opening end within the second accommodating cavity. The bent plate 5 includes a left plate and a right plate spaced parallel to each other, and a horizontally arranged cross plate connecting the two. The bent plate 5 is the main load-bearing and deformation component. The lower end of the left plate is fixedly connected to the inner wall of the second accommodating cavity through a C-shaped deformation plate 6, which is an auxiliary deformation component. The lower end of the right plate has a gap with the inner wall of the second accommodating cavity. The right plate fits against the main beam 1 and is fixedly connected by a connecting screw 3-1. The connecting screw 3-1 passes through the second accommodating cavity in sequence. The crossbeam body 1 and the right plate are screwed together with the first nut 3-2, so that the right plate and the crossbeam body 1 are tightly fixed together. This structure forms a three-point rigid load-bearing structure through the "original upper and lower connection points of the crossbeam body 1 + the side fixing points of the right plate and the crossbeam body 1". The vertical load and impact load that were originally concentrated in the upper and lower connection areas are distributed and transferred through three points, avoiding stress accumulation in a single area. At the same time, the right plate can provide a lateral positioning reference when the crossbeam body 1 is initially connected to the connecting plate 2, which helps to calibrate the insertion posture of the crossbeam body 1 and prevents the insertion from being skewed.

[0024] Furthermore, the distance from the horizontal plate to the inner wall of the second accommodating cavity of the main body 1 of the crossbeam is equal to the distance of the gap. When the truck is moving and generates lateral force, the fixed right plate transmits the lateral force to the inverted U-shaped bending plate 5. The bending plate 5 receives the lateral force through the bending deformation of the left plate and the horizontal plate. The deformation plate 6 undergoes elastic deformation simultaneously to assist in buffering. The symmetrical space can prevent the bending plate 5 from deforming unevenly due to space constraints. This further ensures the structural reliability after the fixed connection and does not affect the overall detachable characteristics.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A split-type detachable crossbeam structure for a truck frame, comprising a U-shaped crossbeam body, with U-shaped connecting plates symmetrically mounted at both ends of the crossbeam body, and both ends of the crossbeam body inserted into the first receiving cavity of the connecting plates, characterized in that: The upper and lower end faces of the connecting plate are symmetrically provided with two rows of through holes corresponding to the main body of the crossbeam, and each row of through holes contains two through holes spaced apart. The second accommodating cavity of the crossbeam body is provided with a U-shaped fixing plate. The opening direction of the fixing plate is consistent with the opening direction of the crossbeam body. A connecting screw protrudes from the side of the fixing plate away from the opening end. The connecting screw passes through the crossbeam body and is screwed with a first nut. Each of the through holes is fitted with a bolt, the bolt thread passing through the connecting plate, the crossbeam body and the fixing plate in sequence. A second nut is screwed onto the bolt between the crossbeam body and the fixing plate, and the second nut abuts against the crossbeam body and the fixing plate simultaneously.

2. The truck frame split-type detachable crossbeam structure according to claim 1, characterized in that: The fixing plate includes a first upper plate and a first lower plate that are spaced apart and parallel to each other, and a first vertical plate that connects the two and is arranged vertically. The first upper plate and the first lower plate are respectively provided with two guide slots with corresponding through holes. The bolt thread passes through the guide slots and extends toward the second accommodating cavity. The first vertical plate has vertical clearance grooves symmetrically formed along its height direction. The clearance grooves are connected to the guide grooves, and the length of the clearance grooves is greater than the length of the screw in the second accommodating cavity.

3. The truck frame split-type detachable crossbeam structure according to claim 2, characterized in that: The width of the end of the clearance groove away from the guide groove is greater than that of the end closer to the guide groove, and the top view cross section of the clearance groove is V-shaped.

4. The truck frame split-type detachable crossbeam structure according to claim 2, characterized in that: The connecting screw consists of two spaced-apart screws, both located on the first vertical plate between two rows of guide slots.

5. The truck frame split-type detachable crossbeam structure according to claim 1, characterized in that: Inside the second accommodating cavity, on the side of the main body of the crossbeam away from its opening end, there is an inverted U-shaped bent plate. The bent plate includes a left plate and a right plate spaced parallel to each other and a horizontal plate connecting the two. The lower end of the left plate is fixedly connected to the inner wall of the second accommodating cavity, and the lower end of the right plate has a gap with the inner wall of the second accommodating cavity. The right plate is attached to the main body of the crossbeam, and the connecting screw passes through the main body of the crossbeam and the right plate in sequence and is screwed with the first nut.

6. The truck frame split-type detachable crossbeam structure according to claim 5, characterized in that: The distance from the cross plate to the inner wall of the second accommodating cavity of the cross beam body is equal to the distance of the gap.

7. The truck frame split-type detachable crossbeam structure according to claim 5, characterized in that: The left plate is fixedly connected to the inner wall of the second accommodating cavity via a C-shaped deformation plate.

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