Front hood mounting structure of bulldozer

Abstract

The utility model relates to the technical field of bulldozer structures, in particular to a bulldozer front hood installation structure which comprises a main machine frame, the upper end face of the main machine frame is fixedly connected with a pin shaft seat, the pin shaft seat is composed of a pair of lug plates, a lining is arranged between the two lug plates, a wear-resisting sleeve is arranged in the lining in a sleeved mode, and a pin shaft is arranged in the wear-resisting sleeve in a sleeved mode. The left side and the right side of the bottom of the front hood are each provided with two pin shaft holes A, and the pin shafts are matched with the pin shaft holes A in an inserted mode. The supporting plate is fixedly arranged on one side of the front hood and located between the pin shaft seats on the same side, the lower end face of the supporting plate makes contact with the upper end face of the main rack, force transmitted to the pin shafts by the front hood is dispersed through the supporting plate arranged on one side of the front hood, the risk that the pin shafts are damaged is reduced, and the service life is prolonged.

Description

Technical field:

[0001] The present application relates to the technical field of bulldozer structures, and in particular to a bulldozer front hood mounting structure. Background technology:

[0002] Chinese utility model patent with patent application number 202410065855.6 - a hood mounting structure and a bulldozer, a hood mounting structure, including a hood and a frame, wherein a pair of ear plates are provided on the left and right sides of the front of the hood, and a pair of pin hole seats matched with the ear plates are provided on the front of the frame, and the hood is connected to the frame by passing a pair of first pins through the ear plates and the pin hole seats respectively; a pair of connecting plates with pin holes are provided on the left and right sides of the rear of the hood, and a pair of pin holes matched with the pin holes on the pair of connecting plates are provided on the frame, and the hood is connected to the frame by connecting the connecting plates and the pin holes with a pair of second pins; the frame is respectively provided with first limit devices at a pair of pin hole seats, and the first limit devices are used to limit the first pin connected to the pin hole seat from escaping from the pin hole seat.

[0003] This patent connects the front hood and the main frame only through a pin shaft. When the bulldozer is working, all the force applied to the front hood will be transmitted to the pin shaft, and then transmitted to the main frame through the pin shaft. The pin shaft has to bear a large load during the force transmission process, and also has to withstand the shear force applied by the front hood and the main frame. This can easily lead to damage to the pin shaft structure, greatly reducing its service life, and even cause it to break, affecting the use of the bulldozer. Utility model content:

[0004] In order to solve the above technical problems, the utility model provides a bulldozer front hood mounting structure, which solves the technical problem that the pin bearing is subjected to a large load, which is very easy to cause structural damage, greatly reducing its service life and affecting the use of the bulldozer. In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] The bulldozer front hood mounting structure is characterized by comprising:

[0006] Front hood: two pin holes A are arranged on the left and right sides of the bottom of the front hood;

[0007] The pin hole seat, the pin shaft, and the pin shaft seat are plugged and matched with the pin shaft hole A through the pin shaft;

[0008] The main frame is located below the front hood, and the upper end surface of the main frame is fixedly connected to the pin shaft seat;

[0009] The support plate is fixedly arranged on one side of the front hood and is located between the pin shaft seats on the same side, and the lower end surface of the support plate contacts the upper end surface of the main frame.

[0010] Furthermore, the support plate is arranged between the pin shaft holes A on the same side, the support plate is provided with at least two bolts, and the support plate is connected to the front hood through the bolts.

[0011] Furthermore, the number of the bolts is three.

[0012] Furthermore, the pin seat is composed of a pair of ear plates, the ear plates are provided with a pin hole B, a bushing is provided between the two ear plates, and a wear-resistant sleeve is provided inside the bushing;

[0013] The pin sleeve is arranged in the wear-resistant sleeve.

[0014] Furthermore, the wear-resistant sleeve is a polyurethane wear-resistant sleeve.

[0015] Furthermore, the support plate is connected to the front hood by welding.

[0016] The beneficial effect of the utility model is that the force transmitted to the pin shaft by the front hood is dispersed by the support plate arranged on one side of the front hood, thereby reducing the risk of damage to the pin shaft. The pin shaft is covered with a bushing, and when the front hood is subjected to an oblique upward force applied by the oil cylinder, the force will directly act on the bushing, thereby avoiding direct force on the pin shaft and extending the service life of the pin shaft. Description of the drawings:

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model after the support plate is disassembled.

[0019] Figure 3 It is a partial structural explosion diagram of the utility model.

[0020] Figure 4 It is a partial structural schematic diagram of the utility model.

[0021] In the figure:

[0022] 1. Front hood, 2. Support plate, 3. Main frame, 4. Bushing, 5. Wear-resistant sleeve, 6. Pin, 7. Bolt, 8. Pin hole A, 9. Pin hole B, 10. Ear plate. Specific implementation method:

[0023] In order to make the purpose, technical scheme and advantages of the implementation of the utility model clearer, the utility model will now be further described in detail with reference to the accompanying drawings and the following examples so that the public can better understand the implementation method of the utility model. The specific implementation scheme of the utility model is as follows:

[0024] The front hood mounting structure of a bulldozer includes a main frame 3, the upper end surface of the main frame 3 is fixedly connected to the pin shaft seat, and due to the assembly structure process, there is a gap between the lower end surface of the front hood 1 and the upper end surface of the main frame 3; the pin shaft seat is composed of a pair of ear plates 10; two pin shaft holes A8 are respectively arranged on the left and right sides of the bottom of the front hood 1, and the pin shaft 6 is plugged into the pin shaft hole A8; the support plate 2 is fixedly arranged on one side of the front hood 1 and is located between the pin shaft seats on the same side, and the lower end surface of the support plate 2 is in contact with the upper end surface of the main frame 3. By means of the support plate 2 arranged on one side of the front hood 1, the force transmitted to the pin shaft 6 by the front hood 1 is dispersed, the risk of damage to the pin shaft 6 is reduced, and the service life of the pin shaft is extended.

[0025] Specifically, the support plate 2 is arranged between the pin shaft holes A8 on the same side, and the support plate 2 is provided with at least two bolts 7. The support plate 2 is connected to the front hood 1 through the bolts 7. When the front hood 1 is subjected to the oblique downward force applied by the cylinder, the force will be transmitted to the support plate 2 through the bolts 7, and then transmitted to the main frame 3 by the support plate 2, thereby avoiding the pin shaft 6 from being subjected to force and extending the service life of the pin shaft 6.

[0026] It should be noted that there are three bolts 7, which can be evenly distributed on the support plate to prevent local damage due to stress concentration, reduce the risk of structural collapse due to failure of a single bolt 7, and increase structural stability.

[0027] It should be explained that the pin seat is composed of a pair of ear plates 10, which are provided with pin holes B9, and a bushing 4 is arranged between the two ear plates 10. A wear-resistant sleeve 5 is arranged inside the bushing 4. The side surface of the bushing 4 is interference fit with the inner surface of the ear plate 10, and the outer surface of the bushing 4 is interference fit with the pin hole A, thereby fixing the center lines of the pin hole A and the pin hole B on an axis to avoid shear force on the pin 6 due to the up and down shaking of the front hood 1.

[0028] Furthermore, the pin shaft 6 is sleeved in the wear-resistant sleeve 5 , and the wear-resistant sleeve 5 directly contacts the pin shaft 6 . The wear-resistant sleeve 5 is a polyurethane wear-resistant sleeve, which eliminates damage caused by hard connection and prevents harmful force from being transmitted to the pin shaft 6 .

[0029] It should be noted that, in another embodiment, the support plate 2 is welded to the front hood 1, and the front hood 1 and the support plate 2 can also be welded to form an integrated structure, which can withstand higher loads than bolt connections, and there is no need to drill holes at the connection locations, thus saving operating procedures.

[0030] The working principle and working process of the utility model are as follows:

[0031] Insert the bushing 4 into the pin hole A8, then insert the wear sleeve 5 into the bushing 4, and then insert the front hood 1 between the two ear plates 10 of the pin seat, ensuring that the two side elevations of the bushing 4 and the wear sleeve 5 fit the inner elevations of the ear plates 10. After the support plate 2 is placed on the upper end surface of the main frame 3, pass the pin 6 through the pin hole B9, the pin hole A8 and the wear sleeve 5 in sequence. Set a card plate at one end of the pin 6, fix the card plate on one side of the pin 6, and connect it to the ear plate 10 by bolts to prevent the pin 6 from falling off. Finally, align the bolt hole on the support plate 2 with the bolt hole 1 on the front hood, and insert the bolt 7 to fix the support plate 2 to the front hood 1.

[0032] In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", "front", "back", "lower left", "upper right", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Although the present invention has been described according to a limited number of embodiments, those skilled in the art, with the benefit of the above description, should understand that other embodiments can be conceived within the scope of the present invention described thereby.

Claims

1. The bulldozer front hood mounting structure is characterized by: include: A front hood (1), wherein two pin holes A (8) are respectively arranged on the left and right sides of the bottom of the front hood (1); A pin hole seat and a pin shaft (6), wherein the pin shaft seat is plug-fitted with the pin shaft hole A (8) through the pin shaft (6); A main frame (3), the main frame (3) is located below the front hood (1), and the upper end surface of the main frame (3) is fixedly connected to the pin shaft seat; The support plate (2) is fixedly arranged on one side of the front hood (1) and is located between the pin shaft seats on the same side, and the lower end surface of the support plate (2) contacts the upper end surface of the main frame (3).

2. The bulldozer front hood mounting structure according to claim 1, characterized in that: The support plate (2) is arranged between the pin shaft holes A (8) on the same side, the support plate (2) is provided with at least two bolts (7), and the support plate (2) is connected to the front hood (1) via the bolts (7).

3. The bulldozer front hood mounting structure according to claim 2, characterized in that: The number of bolts (7) is three.

4. The bulldozer front hood mounting structure according to claim 1, characterized in that: The pin shaft seat is composed of a pair of ear plates (10), the ear plates (10) are provided with a pin shaft hole B (9), a bushing (4) is arranged between the two ear plates (10), and a wear-resistant sleeve (5) is arranged inside the bushing (4); The pin shaft (6) is sleeved in the wear-resistant sleeve (5).

5. The bulldozer front hood mounting structure according to claim 4, characterized in that: The wear-resistant sleeve (5) is a polyurethane wear-resistant sleeve.

6. The bulldozer front hood mounting structure according to claim 1, characterized in that: The support plate (2) is connected to the front hood (1) by welding.

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