Connecting structure of front A-shaped frame of dumper

Abstract

The utility model provides a connecting structure of a front A-shaped frame of a dumper, which relates to an A-shaped frame, and adopts the technical scheme that the connecting structure comprises a barrel body, the barrel body is vertically arranged, a hinged bearing is arranged in the barrel body, a pin shaft is coaxially and vertically arranged in the hinged bearing, the pin shaft is in interference fit with an inner hole of the hinged bearing, and the hinged bearing is arranged in the barrel body. The upper end of the pin shaft is used for being rotatably connected with a hinge seat, a center bolt is arranged in the pin shaft in a penetrating mode, the pin shaft can rotate relative to the center bolt, the upper end of the center bolt is used for being detachably connected with a frame, and the lower end of the center bolt is in interference fit with the hinge bearing. And a lower limiting plate is detachably arranged at the lower part of the cylinder body. The hinge bearing is convenient to disassemble and assemble, and the disassembly and assembly workload is reduced.

Description

Technical Field

[0001] This utility model relates to A-frames, and more particularly to a connection structure for the front A-frame of a dump truck. Background Technology

[0002] Articulated mining dump trucks generally operate in harsher conditions and environments than rigid mining dump trucks, frequently working on rainy and muddy construction sites. Currently, the front axles of articulated mining dump trucks are generally divided into two types: rigid axles and independent suspension axles, using an A-frame structure. In comparison, independent suspension axles offer better overall vibration reduction performance.

[0003] In the prior art, an articulated mining dump truck front axle A-frame is provided, including a connecting part and a frame body. The frame body has an A-shaped structure, and the connecting part is located at the tip of the frame body. The frame body is connected to the axle, and the connecting part is used to connect to the articulation seat of the suspension. The connecting part has a cylindrical structure and is horizontally arranged. An articulation bearing is installed inside it. To limit the movement of the articulation bearing, flange covers are provided at both ends of the connecting part. The flange covers are bolted to the connecting part. A central pin is horizontally arranged at the center of the articulation bearing and is connected to the articulation seat of the suspension.

[0004] In the above technical solutions, since the articulated bearing is a consumable part and needs to be replaced regularly, when the articulated bearing needs to be replaced, the two ends of the center pin must first be disconnected from the articulated seat. Then, the center pin is pulled out, the connection between the A-frame and the suspension is separated, and the axle is rotated to make the A-frame move out of the articulated seat. The flange cover is removed, the center bearing is replaced, and after the flange cover is installed, the axle is rotated so that the connecting part of the A-frame enters the articulated seat. The center pin is then inserted from one end of the articulated seat to connect the center pin to the articulated seat. It can be seen that during the bearing replacement process, the A-frame and the suspension need to be completely separated and the center of gravity needs to be positioned, which makes the workload and labor intensity of replacing the articulated bearing relatively large. Utility Model Content

[0005] To address the technical problem of the large workload involved in replacing the articulated bearings of the front A-frame of a dump truck in the prior art, this utility model provides a connection structure for the front A-frame of a dump truck that facilitates the disassembly and assembly of the articulated bearings, thereby reducing the workload of disassembly and assembly.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a connection structure for the front A-frame of a dump truck, including a cylindrical body, the cylindrical body being vertically arranged, a hinge bearing being arranged inside the cylindrical body, a pin being coaxially and vertically arranged inside the hinge bearing, the pin being interference-fitted with the inner hole of the hinge bearing, the upper end of the pin being rotatably connected to a hinge seat, a central bolt being disposed through the pin, the pin being rotatable relative to the central bolt, the upper end of the central bolt being detachably connected to the vehicle frame, the lower end of the central bolt being interference-fitted with the hinge bearing, and a lower limit plate being detachably arranged at the lower part of the cylindrical body.

[0007] This invention allows for the vertical installation of the cylinder and the installation of a pin, enabling the hinge bearing to be disassembled in a "bottom-out" manner. This eliminates the need to adjust the relative positions of the A-frame and the hinge support, ensuring that the A-frame and the hinge support are always in a connected state. After replacing the hinge bearing, there is no need for repositioning, greatly reducing workload and improving replacement efficiency.

[0008] Furthermore, the pin includes a connecting part one and a connecting part two. The connecting part two has a tapered structure with its small end facing downwards. The inner hole of the hinge bearing is correspondingly provided with a tapered hole, and the connecting part two is interference-fitted with the inner hole of the hinge bearing.

[0009] This invention sets a portion of the pin shaft into a tapered structure. On the one hand, it facilitates the separation of the hinge bearing from the pin shaft when replacing the hinge bearing. On the other hand, the tapered structure can better achieve the upper limit of the hinge bearing, preventing the hinge bearing from moving around inside the cylinder.

[0010] Furthermore, the first connecting part and the second connecting part are connected by a transition arc.

[0011] This invention avoids stress concentration and extends the service life of the pin by setting a transition arc on the pin.

[0012] Furthermore, an upper limit boss is provided on the upper end of the inner wall of the cylinder, which can abut against the hinge bearing.

[0013] This invention further limits the hinge bearing by setting a limiting boss, thereby improving the working stability of the hinge bearing.

[0014] Furthermore, the lower limit plate is connected to the cylinder body by multiple bolts.

[0015] Furthermore, a dustproof ring is provided on the upper end face of the cylinder, and the dustproof ring is coaxially arranged with the hinge bearing.

[0016] This invention, by setting a dustproof ring, can prevent dust and other impurities from entering the hinged bearing and causing bearing wear and failure.

[0017] Furthermore, it also includes two connecting parts, which are disposed on the outer circumferential surface of the cylinder. The two connecting parts are arranged in a figure-eight shape. The connecting parts and the cylinder are integrally cast. The connecting parts are used to connect with the A-frame.

[0018] By setting a connecting part, this utility model can, on the one hand, shift the connection point with the A-frame backward, increase the contact area with the A-frame, and improve the welding firmness; on the other hand, make the overall connecting structure a triangular structure, which can evenly distribute the externally applied force to all parts, greatly reducing the situation of local stress concentration.

[0019] Furthermore, the connecting part has a hollow structure.

[0020] This invention achieves lightweight by making the connecting part a hollow structure.

[0021] Furthermore, a reinforcing rib is provided between the two connecting parts.

[0022] This invention further enhances the strength of the connection structure by setting reinforcing ribs, thus preventing deformation and cracking.

[0023] As can be seen from the above technical solutions, this utility model has the following advantages:

[0024] This utility model provides a connection structure for the front A-frame of a dump truck. By vertically setting the cylinder and incorporating a pin, the hinge bearing can be disassembled in a "bottom-out" manner without adjusting the relative position of the A-frame and the hinge support. This ensures that the A-frame and the hinge support are always connected, eliminating the need for repositioning after bearing replacement, significantly reducing workload and labor intensity, and improving replacement efficiency. By making a portion of the pin a conical structure, it facilitates separation of the hinge bearing from the pin during bearing replacement, and the conical structure also provides better upper limit positioning for the hinge bearing. To prevent the hinged bearing from moving within the cylinder; to avoid stress concentration and extend the service life of the pin by setting a transition arc on the pin shaft; to prevent dust and other impurities from entering the hinged bearing and causing wear and failure; to set a connecting part, on the one hand, the connection point with the A-frame can be moved backward, increasing the contact area with the A-frame and improving the weld strength, and on the other hand, the overall connecting structure is a triangular structure, which can evenly distribute the externally applied force to all parts, greatly reducing the situation of local stress concentration; and to achieve weight reduction by making the connecting part a hollow structure. Attached Figure Description

[0025] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a structural schematic diagram of the first specific embodiment of the present invention in the installed state.

[0027] Figure 2 This is a structural schematic diagram of a second specific embodiment of the present utility model.

[0028] In the diagram, 1. Center bolt; 2. Pin; 201. Connecting part one; 202. Connecting part two; 3. Dustproof ring; 4. Hinge bearing; 5. Cylinder; 501. Upper limit boss; 6. Lower limit plate; 7. Hinge seat; 8. Frame; 10. Connecting part. Detailed Implementation

[0029] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent. Specific Implementation Method 1

[0031] like Figure 1 As shown, this specific embodiment provides a connection structure for the front A-frame of a dump truck, including a cylindrical body 5, which is vertically arranged. A hinge bearing 4 is provided inside the cylindrical body 5. A pin 2 is coaxially and vertically arranged inside the hinge bearing 4. The pin 2 is interference-fitted with the inner hole of the hinge bearing 4. The upper end of the pin 2 is rotatably connected to the hinge seat 7 through the bearing. A central bolt 1 is provided through the pin 2. The pin 2 can rotate relative to the central bolt 1. The upper end of the central bolt 1 is detachably connected to the frame 8 through a nut. A lower limit plate 6 is detachably provided at the lower part of the cylindrical body 5.

[0032] In this specific embodiment, the cylinder 5 is set vertically and a pin 2 is provided. During disassembly, the lower limit plate 6 is removed, and the connection between the center bolt 1 and the frame 8 is released. The hinge bearing 4 to be replaced can then be removed from below the cylinder 5, achieving "removal from below". In this way, there is no need to adjust the relative position of the A-frame and the hinge support, so that the A-frame and the hinge support 7 are always in a connected state. After replacing the hinge bearing 4, there is no need to reposition it, which greatly reduces the workload and improves the replacement efficiency. In addition, the connection structure is connected to the hinge support 7 of the suspension in a vertical state. Compared with a horizontal hinge, this gives the A-frame a degree of rotational freedom, which can transmit longitudinal and lateral forces when turning, reducing the impact on the A-frame.

[0033] like Figure 1 As shown, to achieve the limiting of the hinge bearing 4, the pin 2 includes a connecting part 1 201 and a connecting part 202. The connecting part 202 has a conical structure with its small end facing downwards. The inner hole of the hinge bearing 4 is correspondingly provided with a conical hole. The connecting part 202 is interference-fitted with the inner hole of the hinge bearing 4. The end face of the small end of the connecting part 202 is higher than the lower end face of the central bearing. The lower end face of the central bearing is provided with a limiting head, which is located outside the lower end of the hinge bearing 4. By setting a part of the pin 2 as a conical structure, on the one hand, when replacing the hinge bearing 4, since the interference fit area between the hinge bearing 4 and the pin 2 is small, it is easy to separate the hinge bearing 4 from the pin 2. On the other hand, the conical structure can better achieve the upper limit of the hinge bearing 4 and prevent the hinge bearing 4 from moving inside the cylinder 5. Furthermore, in order to avoid stress concentration, the connecting part 1 201 and the connecting part 202 are connected by a transition arc.

[0034] Furthermore, an upper limit boss 501 is provided on the upper end of the inner wall of the cylinder 5, which can abut against the upper end of the hinge bearing 4. By providing the upper limit boss 501, the hinge bearing 4 can be further prevented from moving upward in the cylinder 5 after being subjected to force, thereby improving its working stability.

[0035] In this specific embodiment, the lower limit plate 6 is connected to the lower end of the cylinder 5 by multiple bolts.

[0036] like Figure 1 As shown, preferably, a dustproof ring 3 is provided on the upper end face of the cylinder 5. The dustproof ring 3 is coaxially arranged with the hinge bearing 4. A boss is provided on the lower end face of the dustproof ring 3, and the boss extends into the inner hole of the cylinder 5.

[0037] The disassembly and assembly process of the hinge bearing 4 in this connection structure is as follows:

[0038] When the articulated bearing 4 needs to be replaced, first remove the lower limit plate 6 from the cylinder 5, then disconnect the connection between the center bolt 1 and the frame 8, apply a downward force to the center bolt 1, and the center bearing will drive the articulated bearing 4 to be replaced to move downward, releasing the interference fit with the pin 2 and disengaging it from the lower part of the cylinder 5; after the new articulated bearing 4 is interference fitted with the center bolt 1, it is inserted from the lower part of the cylinder 5 until the upper end of the center bolt 1 reaches the installation position, the center bolt 1 is connected to the frame 8, and then the lower limit plate 6 is connected to the cylinder 5. Specific Implementation Method Two

[0040] like Figure 2 As shown, this specific embodiment provides a connection structure for the front A-frame of a dump truck, which is basically the same as the structure of the first specific embodiment. The difference is that this specific embodiment also includes two connecting parts 10. The connecting parts 10 are set on the outer circumferential surface of the cylinder 5. The two connecting parts 10 are arranged in a figure-eight shape. The connecting parts 10 and the cylinder 5 are integrally cast. The connecting parts 10 are used to connect with the A-frame.

[0041] This specific embodiment, by setting a connecting part, on the one hand, can shift the connection point with the A-frame backward, increase the contact area with the A-frame, and improve the firmness of the welded connection; on the other hand, it makes the overall connecting structure a triangular structure, which can evenly distribute the externally applied force to all parts, greatly reducing the situation of local stress concentration.

[0042] To achieve lightweight design, the connecting part 10 is a hollow structure.

[0043] To further enhance strength, two reinforcing ribs 9 are provided between the two connecting parts 10.

[0044] As can be seen from the above specific embodiments, this utility model has the following beneficial effects:

[0045] 1. By setting the cylinder 5 vertically and setting the pin 2, the hinge bearing 4 can be disassembled in a "bottom release" manner without adjusting the relative position of the A-frame and the hinge support. This ensures that the A-frame and the hinge support 7 are always in a connected state. After replacing the hinge bearing 4, there is no need to reposition it, which greatly reduces the workload and labor intensity and improves the replacement efficiency.

[0046] 2. By setting a portion of the pin 2 into a conical structure, on the one hand, it is easier to separate the hinge bearing 4 from the pin 2 when replacing the hinge bearing 4; on the other hand, the conical structure can better achieve the upper limit of the hinge bearing 4, preventing the hinge bearing 4 from moving inside the cylinder 5.

[0047] 3. By setting a transition arc on the pin 2, stress concentration can be avoided and the service life of the pin 2 can be extended; by setting a dustproof ring 3, dust and other impurities can be prevented from entering the hinge bearing 4 and causing bearing wear and failure.

[0048] 4. By setting the connecting part, on the one hand, the connection point with the A-frame can be moved backward, increasing the contact area with the A-frame and improving the welding firmness. On the other hand, the overall connection structure is a triangular structure, which can evenly distribute the externally applied force to all parts, greatly reducing the situation of local stress concentration.

[0049] 5. Lightweighting is achieved by setting the connecting part 10 as a hollow structure.

[0050] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A connecting structure of a front A-frame of a self-unloading vehicle, comprising a cylinder (5), characterized in that, The barrel (5) is vertically arranged, the barrel (5) is provided with a hinge bearing (4), the hinge bearing (4) is coaxially and vertically provided with a pin shaft (2), the pin shaft (2) is in interference fit with the inner hole of the hinge bearing (4), the upper end of the pin shaft (2) is used for being rotatably connected with a hinge seat (7), the pin shaft (2) is provided with a center bolt (1) penetrating through, the pin shaft (2) can rotate relative to the center bolt (1), the upper end of the center bolt (1) is used for being detachably connected with a frame (8), the lower end of the center bolt (1) is in interference fit with the hinge bearing (4), and the lower part of the barrel (5) is detachably provided with a lower limiting plate (6).

2. The connection structure of a front A-frame of a self-unloading truck according to claim 1, characterized in that, The pin shaft (2) comprises a connecting part one (201) and a connecting part two (202), the connecting part two (202) is a tapered structure, the small end of the connecting part two (202) faces downward, the inner hole of the hinge bearing (4) is correspondingly provided with a tapered hole, and the connecting part two (202) is in interference fit with the inner hole of the hinge bearing (4).

3. The connection structure of a front A-frame of a self-unloading truck according to claim 2, characterized in that, The connecting part one (201) and the connecting part two (202) are connected through a transition arc.

4. The connection structure of a front A-frame of a self-unloading truck according to claim 3, characterized in that, The inner wall of the barrel (5) is provided with an upper limiting boss (501) at the upper end, and the upper limiting boss (501) can abut against the hinge bearing (4).

5. The connection structure of a front A-frame of a self-unloading truck according to claim 4, characterized in that, The lower limiting plate (6) is connected with the barrel (5) through a plurality of bolts.

6. The connection structure of a front A-frame of a dump truck according to any one of claims 1 to 5, characterized in that, The upper end surface of the barrel (5) is provided with a dustproof ring (3), and the dustproof ring (3) is coaxially arranged with the hinge bearing (4).

7. The connection structure of a front A-frame of a self-unloading truck according to claim 6, characterized in that, Two connecting parts (10) are further included, the connecting parts (10) are arranged on the outer circumferential surface of the barrel (5), the two connecting parts (10) are arranged in a splayed shape, the connecting parts (10) and the barrel (5) are a cast integrated structure, and the connecting parts (10) are used for being connected with an A-shaped frame.

8. The connection structure of a front A-frame of a self-unloading truck according to claim 7, characterized in that, The connecting part (10) is a hollow structure.

9. The connection structure of a front A-frame of a self-unloading truck according to claim 8, characterized in that, A reinforcing rib plate (9) is arranged between the two connecting parts.

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