Pin shaft sleeve fixing structure of mine dump truck

Abstract

The utility model relates to the technical field of mine car equipment discloses a pin shaft sleeve fixing structure of mine dump truck, including installation support and connected piece, one side of installation support is connected with first bushing, the other side of installation support is connected with second bushing, the ball bearing is fixedly connected in connected piece, the side of first bushing and second bushing relative ball bearing is respectively movably connected with the spacer ring, the side of spacer ring is movably connected with a plurality of limit sliding blocks, and the pin shaft is connected in first bushing, second bushing and ball bearing. First bushing and second bushing cooperate with fixed bolt and pin shaft fixed bolt of simple structure positioning bolt and pin shaft fixed bolt can realize the axial and radial positioning of first bushing and second bushing, can effectively prevent the first bushing and second bushing from rotating and coming out due to environmental factors such as temperature and stress filling change, at the same time, the first bushing and second bushing are not designed with flange, do not occupy axial space, realize both sides detachable.

Description

Technical Field

[0001] This utility model relates to the field of mining vehicle equipment technology, and in particular to a pin shaft bushing fixing structure for a mining dump truck. Background Technology

[0002] Mining dump trucks are essential engineering machinery for transporting ore and stripping layers in large open-pit mines both domestically and internationally. As special engineering vehicles, they have complex structures, high technical content, and high prices. Due to their excessive height and width, they can only operate on dedicated roads in mining areas. Mining dump trucks have a relatively large number of rotating parts and are subjected to high stress and impact loads. Rotating parts typically employ pin and bushing designs. The bushings, base, and pins generally use an interference fit. When the interference fit is large, installation, maintenance, and disassembly become very difficult. When the interference fit is small, the bushing is prone to axial dislodgement and failure due to the high stress and temperature fluctuations. Currently, existing solutions to these problems include designing bushings with flanges and designing stepped holes in the bushing mounting base. However, the flanged bushing solution has limitations due to the flange... The bushing's positioning design effectively prevents axial dislodgement, but it cannot prevent axial rotation, which can easily damage the bushing's mounting base. Secondly, because one end of the bushing has a flange, the bushing can only be installed and disassembled in one direction, resulting in poor installation and maintenance processability. In addition, the stepped hole design of the bushing mounting base can also effectively prevent the bushing from axial dislodgement, but it cannot prevent axial rotation. Furthermore, the bushing needs to be installed from a single direction on the base, and subsequent maintenance, replacement, and removal are very difficult, often requiring destructive operations, resulting in poor disassembly processability. Utility Model Content

[0003] The purpose of this utility model is to provide a pin shaft and bushing fixing structure for a mining dump truck, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A pin bushing fixing structure for a mining dump truck includes a mounting support and a connected component. A first bushing is inserted and connected to one side of the mounting support, and a second bushing is inserted and connected to the other side of the mounting support. A ball bearing is fixedly connected to the connected component. Spacer rings are movably connected to the first bushing and the second bushing on the side opposite to the ball bearing. A plurality of limiting sliders are movably connected to one side of the spacer ring. A pin is inserted and connected to the first bushing, the second bushing, and the ball bearing.

[0005] As a further preferred embodiment of this utility model, a plurality of first support mounting holes are provided on one side of the mounting bracket, and positioning bolts are threaded into the first support mounting holes to provide limiting conditions for the first bushing. Two second support mounting holes are provided on the other side of the mounting bracket, and pin fixing bolts are inserted between the two second support mounting holes. The pin fixing bolts can limit the second bushing and limit the pin at the same time.

[0006] As a further preferred embodiment of this utility model, a plurality of positioning grooves are provided on the outer side of the first bushing. The positioning grooves are rectangular, so that after the first bushing is inserted and connected to one side of the mounting bracket, one end of its positioning bolt abuts against the positioning groove, thereby restricting the axial and radial movement of the first bushing. A first annular limiting groove is provided on the side of the first bushing opposite to the ball bearing, providing conditions for the pre-installation of its spacer ring on one side of the first bushing.

[0007] As a further preferred embodiment of this utility model, two first limiting holes are provided on the inner side of the second bushing, which are the passageways for the pin fixing bolts. A second annular limiting groove is provided on the side of the second bushing opposite to the ball bearing, which can provide conditions for one of the spacers to be prefabricated on one side of the second bushing.

[0008] As a further preferred embodiment of this utility model, a plurality of mounting grooves are provided on one side of the spacer ring, and a plurality of first countersunk holes are provided on the outer side of the spacer ring, wherein the mounting grooves are connected to the corresponding first countersunk hole channels.

[0009] As a further preferred embodiment of this utility model, the limiting slider is arc-shaped, and a second countersunk hole is provided inside the limiting slider. The limiting slider is inserted into the corresponding mounting groove. A limiting slider fixing bolt is inserted into the second countersunk hole. One end of the limiting slider fixing bolt is threaded to the inside of the mounting groove, thereby realizing the limiting slider under force displacement in the mounting groove and providing an anti-fall-off function for the limiting slider. A push adjustment bolt is threaded into the first countersunk hole. The end of the push adjustment bolt near the limiting slider has a spherical structure. So when the push adjustment bolt is rotated towards the limiting slider, the spherical structure part of one end of the push adjustment bolt abuts against the slope of the top of the limiting slider and pushes the limiting slider, so that one side of the limiting slider is inserted into the first annular limiting groove or the second annular limiting groove.

[0010] As a further preferred embodiment of this utility model, a second limiting hole is provided on one side of the pin shaft, and the pin shaft fixing bolt passes through the second limiting hole, thereby limiting the axial and radial movement of the pin shaft.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. In this utility model, the first bushing and the second bushing are simple in structure and are positioned by positioning bolts and pin fixing bolts to achieve axial and radial positioning of the first bushing and the second bushing. This can effectively prevent the first bushing and the second bushing from coming off and rotating due to environmental factors such as temperature and changes in force loading. At the same time, the flangeless design of the first bushing and the second bushing does not occupy axial space and can be detached on both sides.

[0012] 2. In this utility model, a limiting slider that can be adjusted by a push-adjusting bolt is provided on one side of the spacer ring, which can realize that before the mounting support is inserted into the first bushing, the second bushing, and the spacer ring, the two spacer rings are respectively placed between the ball bearing and the first bushing or the second bushing, thereby improving the positioning efficiency of the spacer ring. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of the main structure of this utility model; Figure 2 This is a schematic diagram of the first bushing structure of the present invention; Figure 3 This is a schematic diagram of the second bushing structure of the present invention; Figure 4 This is a schematic diagram of the spacer ring structure of this utility model; Figure 5 This is a partial cross-sectional view of the spacer ring of this utility model.

[0014] In the diagram: 1. Mounting support; 2. Connected component; 3. First bushing; 4. Second bushing; 5. Ball bearing; 6. Spacer ring; 7. Limiting slider; 8. Pin; 9. First support mounting hole; 10. Positioning bolt; 11. Second support mounting hole; 12. Pin fixing bolt; 13. Positioning groove; 14. First annular limiting groove; 15. First limiting hole; 16. Second annular limiting groove; 17. Mounting groove; 18. First countersunk hole; 19. Second countersunk hole; 20. Limiting slider fixing bolt; 21. Push adjustment bolt; 22. Second limiting hole. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0016] like Figures 1-5As shown, the present invention provides a pin bushing fixing structure for a mining dump truck, including a mounting support 1 and a connected component 2. A first bushing 3 is inserted and connected to one side of the mounting support 1, and a second bushing 4 is inserted and connected to the other side of the mounting support 1. A ball bearing 5 is fixedly connected to the connected component 2. A spacer ring 6 is movably connected to the first bushing 3 and the second bushing 4 on the side opposite to the ball bearing 5. A plurality of limiting sliders 7 are movably connected to one side of the spacer ring 6. A pin 8 is inserted and connected to the first bushing 3, the second bushing 4, and the ball bearing 5.

[0017] like Figures 1-3 As shown, the mounting bracket 1 has several first mounting holes 9 on one side, with positioning bolts 10 internally threaded into each hole 9 to provide a limiting condition for the first bushing 3. The mounting bracket 1 has two second mounting holes 11 on the other side, with pin fixing bolts 12 interlaced between them. The pin fixing bolts 12 can limit the second bushing 4 and simultaneously limit the pin 8. The outer side of the first bushing 3 has several rectangular positioning grooves 13, allowing the first bushing 3 to interlaced with... After the support 1 is installed on one side, one end of the positioning bolt 10 abuts against the positioning groove 13 to restrict the axial and radial movement of the first bushing 3. The first bushing 3 has a first annular limiting groove 14 on the side opposite to the ball bearing 5, which provides conditions for the pre-installation of the spacer ring 6 on the side of the first bushing 3. The second bushing 4 has two first limiting holes 15 on the inner side, which are the passageways for the pin fixing bolt 12. The second bushing 4 has a second annular limiting groove 16 on the side opposite to the ball bearing 5, which provides conditions for the pre-installation of one of the spacer rings 6 on the side of the second bushing 4.

[0018] like Figures 4-5As shown, a plurality of mounting grooves 17 are provided on one side of the spacer ring 6, and a plurality of first countersunk holes 18 are provided on the outer side of the spacer ring 6. The mounting grooves 17 are connected to the corresponding first countersunk holes 18. The limiting slider 7 is arc-shaped, and a second countersunk hole 19 is provided inside the limiting slider 7. The limiting slider 7 is inserted into the corresponding mounting groove 17. A limiting slider fixing bolt 20 is inserted into the second countersunk hole 19. One end of the limiting slider fixing bolt 20 is threaded to the inner side of the mounting groove 17, thereby realizing the limiting slider 7 under force displacement in the mounting groove 17 and providing an anti-fall-off function for the limiting slider 7. The first countersunk hole 18 is also provided. The pin 8 is internally threaded with a push-adjusting bolt 21. The end of the push-adjusting bolt 21 near the limiting slider 7 has a spherical structure. When the push-adjusting bolt 21 is rotated toward the limiting slider 7, the spherical part of the push-adjusting bolt 21 abuts against the slope of the top of the limiting slider 7 and pushes the limiting slider 7. This causes one side of the limiting slider 7 to be inserted into the first annular limiting groove 14 or the second annular limiting groove 16. A second limiting hole 22 is opened on one side of the pin 8. The pin fixing bolt 12 passes through the second limiting hole 22, thereby limiting the axial and radial movement of the pin 8.

[0019] It should be noted that this utility model is a pin and bushing fixing structure for a mining dump truck. Before installation, the mounting support 1, the connected part 2, the first bushing 3, the second bushing 4, the ball bearing 5, the spacer 6, the limiting slider 7, the pin 8, and other components should be cleaned to remove surface oil and impurities and check for damage. Then, the ball bearing 5 is fixed in the connected part 2. Subsequently, the first bushing 3 and the second bushing 4 are pressed into one side of the mounting support 1, so that the positioning groove 13 on the outer side of the first bushing 3 aligns with the corresponding first... The mounting holes 9 of the support are aligned, and the first limiting hole 15 on the inner side of the second bushing 4 is aligned with the corresponding second support mounting hole 11. Then, the end of the connecting piece 2 with the ball bearing 5 is inserted into the mounting support 1, and one of the spacers 6 is placed into the mounting support 1 and attached to one side of the first bushing 3 or the second bushing 4. Then, one of the push adjustment bolts 21 is rotated by a tool, so that the push adjustment bolt 21 rotates in the first countersunk hole 18, thereby causing one end of the push adjustment bolt 21 to abut against the first countersunk hole 18. Push the limiting slider 7 to one side by placing it on the slope at the top of the limiting slider 7, so that one side of the limiting slider 7 is inserted into the first annular limiting groove 14 or the second annular limiting groove 16. At this time, the spacer 6 is restricted between the ball bearing 5 and the first bushing 3 or the second bushing 4. The spacer 6 can be rotated, and the other limiting slider 7 can be displaced in the same way as above, so that the spacer 6 is pre-installed on one side of the first bushing 3 or the second bushing 4. Then, the other spacer 6 can be installed in the same way as above. Finally, the pins 8 are sequentially... Insert the first bushing 3, ball bearing 5, and second bushing 4, aligning them with the second limiting hole 22 of the pin 8. Then, screw the positioning bolt 10 into the first support mounting hole 9, so that one end of the positioning bolt 10 abuts against the corresponding positioning groove 13, thereby restricting the axial and radial movement of the first bushing 3. In addition, the pin fixing bolt 12 passes through multiple second support mounting holes 11, first limiting holes 15, and second limiting holes 22, and is limited by a nut, thereby limiting the axial and radial movement of the second bushing 4 and the pin 8.

[0020] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pin and bushing fixing structure for a mining dump truck, characterized in that: The assembly includes a mounting bracket (1) and a connected component (2). A first bushing (3) is inserted into one side of the mounting bracket (1), and a second bushing (4) is inserted into the other side of the mounting bracket (1). A ball bearing (5) is fixedly connected inside the connected component (2). A spacer (6) is movably connected to the first bushing (3) and the second bushing (4) on the side opposite to the ball bearing (5). A plurality of limiting sliders (7) are movably connected to one side of the spacer (6). A pin (8) is inserted into the first bushing (3), the second bushing (4), and the ball bearing (5).

2. The pin shaft and bushing fixing structure for a mining dump truck according to claim 1, characterized in that: The mounting bracket (1) has several first mounting holes (9) on one side, and a positioning bolt (10) is threaded into the first mounting hole (9). The mounting bracket (1) has two second mounting holes (11) on the other side, and a pin fixing bolt (12) is inserted between the two second mounting holes (11).

3. The pin shaft and bushing fixing structure for a mining dump truck according to claim 2, characterized in that: The first bushing (3) has several positioning grooves (13) on its outer side. The positioning grooves (13) are rectangular. The first bushing (3) has a first annular limiting groove (14) on one side relative to the ball bearing (5).

4. The pin shaft and bushing fixing structure for a mining dump truck according to claim 2, characterized in that: The second bushing (4) has two first limiting holes (15) on its inner side, and a second annular limiting groove (16) is provided on the side of the second bushing (4) opposite to the ball bearing (5).

5. The pin shaft and bushing fixing structure for a mining dump truck according to claim 1, characterized in that: The spacer ring (6) has several mounting grooves (17) on one side and several first countersunk holes (18) on the outer side of the spacer ring (6). The mounting grooves (17) are connected to the corresponding first countersunk holes (18).

6. The pin shaft and bushing fixing structure for a mining dump truck according to claim 5, characterized in that: The limiting slider (7) is arc-shaped, and a second countersunk hole (19) is provided inside the limiting slider (7). The limiting slider (7) is inserted into the corresponding mounting groove (17). A limiting slider fixing bolt (20) is inserted into the second countersunk hole (19). One end of the limiting slider fixing bolt (20) is threaded into the first countersunk hole (18) inside the mounting groove (17), and a push adjustment bolt (21) is threaded into it. The end of the push adjustment bolt (21) near the limiting slider (7) is a spherical structure.

7. The pin shaft and bushing fixing structure for a mining dump truck according to claim 2, characterized in that: A second limiting hole (22) is provided on one side of the pin (8), and the pin fixing bolt (12) passes through the second limiting hole (22).

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