Bottom guard plate automatic opening structure for bulldozer

Abstract

The utility model relates to the technical field of bulldozers, in particular to an automatic bottom guard plate opening structure for a bulldozer. The bottom protection plate comprises a front bottom protection plate, a rear bottom protection plate and a frame, the front bottom protection plate is hinged to a first hinge mechanism, the rear bottom protection plate is hinged to the frame through a second hinge mechanism, a first electric winch and a second electric winch are arranged in the frame, the first electric winch is connected with a first lifting lug through a rope, and the second electric winch is connected with a second lifting lug through a rope. The first lifting lug is arranged on the front bottom protection plate and located on the side different from the first hinge mechanism, and the second lifting lug is arranged on the rear bottom protection plate and located on the side different from the second hinge mechanism. In the mounting and dismounting process, manual lifting or lifting of a lifting device is not needed, and time and labor are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of bulldozers, and specifically relates to an automatic opening structure of a bottom guard plate for a bulldozer. Background Art

[0002] At present, the bottom guard plate structure of a bulldozer is a bolt-mounted structure. The bottom guard plate is relatively heavy, reaching hundreds of kilograms. During the process of disassembling and installing the bottom guard plate, it entirely depends on manual lifting or a hydraulic support tooling, which is time-consuming and laborious, and the assembly efficiency is low. Secondly, during the operation of the bulldozer at the construction site, when chassis system failures (such as engine oil leakage, hydraulic system oil leakage, and transmission system failures) occur and the bottom guard plate needs to be disassembled for maintenance, it can only be disassembled and assembled manually, resulting in inconvenience in troubleshooting and maintaining the entire machine. Generally speaking, both disassembling and installing the bottom guard plate of a bulldozer are time-consuming and laborious. Content of the Utility Model

[0003] The problem to be solved: To provide a bottom guard plate structure that is more convenient, labor-saving for disassembly and assembly.

[0004] To achieve the above object, the utility model provides the following technical solution: The bottom guard plate includes a front bottom guard plate and a rear bottom guard plate. The front bottom guard plate is hinged to the front end of the vehicle frame through a hinge mechanism I. The rear bottom guard plate is hinged to the vehicle frame through a hinge mechanism II. An electric winch I and an electric winch II are arranged inside the vehicle frame. The electric winch I is connected to a lifting lug I through a rope. The electric winch II is connected to a lifting lug II through a rope. The lifting lug I is arranged on the front bottom guard plate and on a side different from the hinge mechanism I. The lifting lug II is arranged on the rear bottom guard plate and on a side different from the hinge mechanism II.

[0005] Preferably, a travel limit switch I and a travel limit switch II are arranged inside the vehicle frame. The travel limit switch I and the travel limit switch II are respectively connected to the electric winch I and the electric winch II. A limit plate I arranged on the front bottom guard plate corresponds to the travel limit switch I. A limit plate II arranged on the rear bottom guard plate corresponds to the travel limit switch II.

[0006] Preferably, a limiting device is further arranged on the vehicle frame. The limiting device is a rotatable L-shaped structure. The limiting device includes a fixed block and a rotating block. The fixed block is fixed on the outer side of the vehicle frame. The rotating block can rotate relative to the vehicle frame at the bottom of the bottom guard plate through a hinge bolt.

[0007] Preferably, a motor control box is arranged inside the vehicle frame. The motor control box can independently control the electric winch I and the electric winch II.

[0008] Preferably, the hinge mechanism I includes a bolt I and a hinge bracket. A hinge plate I is arranged on the front bottom guard plate corresponding to the position of the bolt I. The bolt I strings and connects the movable ends of the hinge plate I and the hinge bracket and is locked and limited through a slotted nut and a fixing pin. The fixed end of the hinge bracket is connected to the vehicle frame.

[0009] Preferably, the second hinge mechanism includes two hinge plates arranged at intervals and a second hinge plate cooperating with the hinge plates. The hinge plates are fixed inside the vehicle frame, and the second hinge plate is arranged on the rear bottom guard plate.

[0010] Compared with the prior art, the present utility model provides an automatic opening structure for the bottom guard plate of a bulldozer, which has the following beneficial effects: during installation, the bottom guard plate first installs the hinged side, and then the electric winch provides an upward pulling force without manual lifting; the cooperation between the limit plate and the travel limit switch enables the electric winch to stop in time and prevents the bottom guard plate from rising excessively; during maintenance, it is not necessary to completely remove the bottom guard plate. It only needs to remove the bolts on one side and then use the electric winch to rotate and lower the bottom guard plate; the limiting device can support the bottom guard plate when the rope or the electric winch fails. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of the vehicle frame of the present utility model;

[0012] Figure 2 is a schematic structural diagram of the bottom guard plate of the present utility model;

[0013] Figure 3 is a schematic structural diagram of the assembled present utility model;

[0014] Figure 4 is an exploded view related to the present utility model.

[0015] Description of the reference numerals: 1. Vehicle frame; 11. Electric winch mounting seat; 12. First travel limit switch; 13. Second travel limit switch; 14. First electric winch; 15. Second electric winch; 16. Motor control box; 2. Limiting device; 21. Fixed block; 22. Rotating block; 3. Front bottom guard plate; 31. First hinge mechanism; 311. First bolt; 312. Hinge bracket; 313. First hinge plate; 32. First lifting lug; 33. First limit plate; 4. Rear bottom guard plate; 41. Second hinge mechanism; 411. Hinge plate; 412. Second hinge plate; 42. Second lifting lug; 43. Second limit plate; 5. Second bolt; 6. Gasket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following will describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model:

[0017] In the prior art, during the installation of the bottom guard plate of a bulldozer, manual lifting or the use of a support tooling is required. The bottom guard plate is heavy, and both installation and disassembly are very laborious and time-consuming. The device of the present utility model is provided to solve the above problems.

[0018] As shown in the figure, an automatic opening structure for the bottom guard plate of a bulldozer. The bottom guard plate includes a front bottom guard plate 3 and a rear bottom guard plate 4. Currently, both the front bottom guard plate 3 and the rear bottom guard plate 4 are connected to the vehicle frame 1 through a plurality of bolts two 5. During installation, the bottom guard plate needs to be completely lifted. When the whole machine needs to be overhauled, all the bolts two 5 are removed. In the present utility model, one side of the front bottom guard plate 3 is connected to the vehicle frame 1 through a hinge mechanism one 31, and the front bottom guard plate 3 is hinged to the hinge mechanism one 31 through a hinge plate one 313 provided thereon, so that the front bottom guard plate 3 can rotate relative to the vehicle frame 1 at a certain angle. One side of the rear bottom guard plate 4 is connected to the vehicle frame 1 through a hinge mechanism two 41, and the rear bottom guard plate 4 can rotate relative to the vehicle frame 1. Inside the vehicle frame 1, an electric winch one 14 and an electric winch two 15 are connected through two electric winch mounting seats 11. The electric winch one 14 is connected to a lifting lug one 32 through a rope. The lifting lug one 32 is provided on the front bottom guard plate 3 and is located on the side different from the hinge mechanism one 31; the electric winch two 15 is connected to a lifting lug two 42 through a rope. The lifting lug two 42 is provided on the rear bottom guard plate 4 and is located on the side different from the hinge mechanism two 41. An electric motor control box 16 is also provided inside the vehicle frame 1, and the electric motor control box 16 can independently control the electric winch one 14 and the electric winch two 15. In this way, by manually operating the switch on the electric motor control box 16, it can be controlled whether the electric winch one 14 and the electric winch two 15 operate. When the electric winch one 14 operates, it can pay out or take in the rope, and then pull up or lower the front bottom guard plate 3 through the lifting lug one 32; when the electric winch two 15 operates, it can pay out or take in the rope, and then pull up or lower the rear bottom guard plate 4 through the lifting lug two 42.

[0019] In order to ensure that the electric winch one 14 and the electric winch two 15 stop operating immediately after the front bottom guard plate 3 and the rear bottom guard plate 4 reach the designated positions during installation, a travel limit switch one 12 and a travel limit switch two 13 are provided inside the vehicle frame 1. The travel limit switch one 12 and the travel limit switch two 13 are respectively connected to the electric winch one 14 and the electric winch two 15. A limit plate one 33 provided on the front bottom guard plate 3 corresponds to the travel limit switch one 12, and a limit plate two 43 provided on the rear bottom guard plate 4 corresponds to the travel limit switch two 13. Taking the front bottom guard plate 3 as an example, during installation, the hinge mechanism one 31 is installed in place, the hinge plate one 313 is connected to the hinge mechanism one 31, the rope connects the lifting lug one 32 and the electric winch one 14. After starting the electric winch one 14, the front bottom guard plate 3 rotates around the hinge point towards the vehicle frame 1. When it rotates to the designated position, the travel limit switch one 12 contacts the limit plate one 33, and the electric winch one 14 receives the in-place signal from the travel limit switch one 12 and stops operating. The whole process does not require manual lifting or a hydraulic device, and then the vehicle frame 1 and the front bottom guard plate 3 are connected together through a plurality of bolts two 5 and gaskets 6. The installation process of the rear bottom guard plate 4 is the same.

[0020] After installation, to prevent the bottom guard plate from detaching from the vehicle frame 1 due to bolt loosening, motor failure, or winch rope damage, a limiting device 2 is also provided on the vehicle frame 1. The limiting device 2 is a rotatable L-shaped structure. The limiting device 2 includes a fixed block 21 and a rotating block 22. The fixed block 21 and the rotating block 22 are rotationally connected by bolts. The fixed block 21 is fixed on the outside of the vehicle frame 1. The rotating block 22 can rotate relative to the vehicle frame 1 at the bottom of the bottom guard plate through a hinge bolt. Limiting devices 2 are provided at positions corresponding to the front bottom guard plate 3 and the rear bottom guard plate 4. Before installation, the rotating block 22 is in the same direction as the length of the vehicle frame 1. After installation, the rotating block 22 rotates to the bottom of the bottom guard plate to form a lift for the bottom guard plate.

[0021] The hinge mechanism 31 includes a bolt 311, a hinge bracket 312, and a hinge plate 313. The fixed end of the hinge bracket 312 is connected to the vehicle frame 1. The movable end of the hinge bracket 312 is sleeved outside the bolt 311. The movable end of the hinge plate 313 is connected to the end of the bolt 311. When connecting, first fix the fixed end of the hinge bracket 312 to the vehicle frame 1 with bolt 5. The bolt 311 passes through the hinge plate 313 and the hinge bracket 312 and is tightened with a slotted nut. Finally, place the fixing pin into the nut groove for limiting. In this way, the front bottom guard plate 3 can rotate around the bolt 311 through the hinge plate 313, and the bolt 311 can rotate around the vehicle frame 1 through the hinge bracket 312. This allows only some bolts to be removed, enabling the front bottom guard plate 3 to rotate and descend relative to the vehicle frame 1. During installation, first install part of the hinge mechanism 31 and then lift the front bottom guard plate 3 with the electric winch 14, and then install the bolts 5 at other positions.

[0022] The hinge mechanism 41 includes two spaced-apart hinge plates 411 and a hinge plate 412 that cooperates with the hinge plates 411. The hinge plates 411 are fixed inside the vehicle frame 1, and the hinge plate 412 is provided on the rear bottom guard plate 4. The hinge plates 411 and the hinge plate 412 are hinged through a screw rod. The rear bottom guard plate 4 rotates around the vehicle frame 1 through the hinge plate 412. During installation, first install the hinge mechanism 41 and then tighten the bolts 5 at other parts.

[0023] During installation, first install the electric winch 14 and the electric winch 15 on the electric winch mounting seat 11 inside the vehicle frame 1 and complete the wiring. The front bottom guard plate 3 and the rear bottom guard plate 4 are installed at the bottom of the vehicle frame 1 through their respective hinges. Connect the electric winch 14 and the lifting lug 32 with a rope, and connect the electric winch 15 and the lifting lug 42 with a rope. Start the electric winch 14, and the rope drives the front bottom guard plate 3 to rotate around the hinge mechanism 31 until the limit plate 33 at the installation position contacts the travel limit switch 12, then the electric winch 14 stops. Then use the bolt 5 to tighten the front bottom guard plate 3 and the vehicle frame 1 to complete the installation. The installation of the rear bottom guard plate 4 is the same.

[0024] During maintenance, in the prior art, all bolts need to be removed to remove the bottom guard plate for maintenance. However, with the structure of the present utility model, it is not necessary to completely remove the bottom guard plate. Taking the front bottom guard plate 3 as an example, due to the hinge mechanism 1-31, the limiting device 2 and the first lifting lug 32, we only need to first remove the second bolt 5 outside the area of the hinge mechanism 1-31. At this time, under the combined action of the hinge mechanism 1-31, the limiting device 2 and the first lifting lug 32, the front bottom guard plate 3 and the vehicle frame 1 are still in contact connection. After the second bolt 5 is removed, rotate the rotating block 22 to be parallel to the length direction of the vehicle frame and start the first electric winch 14. The rope extends, and the front bottom guard plate 3 rotates around the hinge mechanism 1-31 and moves away from the vehicle frame 1. After the front bottom guard plate 3 is lowered in place, it then enters the engine room from the bottom of the whole machine for maintenance. After the maintenance is completed, it can be installed according to the installation steps. The maintenance of the rear bottom guard plate 4 side is the same by analogy.

[0025] The above embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

Claims

1. An automatic opening structure for the bottom guard plate of a bulldozer. The bottom guard plate includes a front bottom guard plate (3) and a rear bottom guard plate (4), and is characterized in that: The front bottom guard plate (3) is hinged to the front end of the vehicle frame (1) through the first hinge mechanism (31), and the rear bottom guard plate (4) is hinged to the rear end of the vehicle frame (1) through the second hinge mechanism (41). An electric winch one (14) and an electric winch two (15) are arranged inside the vehicle frame (1). The electric winch one (14) is connected to the lifting lug one (32) through a rope, and the electric winch two (15) is connected to the lifting lug two (42) through a rope. The lifting lug one (32) is arranged on the front bottom guard plate (3) and on a side different from the first hinge mechanism (31), and the lifting lug two (42) is arranged on the rear bottom guard plate (4) and on a side different from the second hinge mechanism (41).

2. The automatic opening structure of the bottom guard plate for a bulldozer according to claim 1, characterized in that: A first travel limit switch (12) and a second travel limit switch (13) are arranged inside the vehicle frame (1). The first travel limit switch (12) and the second travel limit switch (13) are respectively connected to the electric winch one (14) and the electric winch two (15). A first limit plate (33) arranged on the front bottom guard plate (3) corresponds to the first travel limit switch (12), and a second limit plate (43) arranged on the rear bottom guard plate (4) corresponds to the second travel limit switch (13).

3. The automatic opening structure of the bottom guard plate for a bulldozer according to claim 2, characterized in that: The vehicle frame (1) is further provided with a limit device (2). The limit device (2) is a rotatable L-shaped structure. The limit device (2) includes a fixed block (21) and a rotating block (22). The fixed block (21) is fixed on the outer side of the vehicle frame (1), and the rotating block (22) can rotate relative to the vehicle frame (1) at the bottom of the bottom guard plate through a hinge bolt.

4. The automatic opening structure of the bottom guard plate for a bulldozer according to claim 1, characterized in that: An electric motor control box (16) is arranged inside the vehicle frame (1). The electric motor control box (16) can independently control the electric winch one (14) and the electric winch two (15).

5. The automatic opening structure of the bottom guard plate for a bulldozer according to claim 3, characterized in that: The first hinge mechanism (31) includes a bolt one (311) and a hinge bracket (312). A hinge plate one (313) is arranged on the front bottom guard plate (3) corresponding to the position of the bolt one (311). The bolt one (311) serially connects the movable ends of the hinge plate one (313) and the hinge bracket (312) and is locked and limited through a slotted nut and a fixing pin. The fixed end of the hinge bracket (312) is connected to the vehicle frame (1).

6. The automatic opening structure of the bottom guard plate for a bulldozer according to claim 5, characterized in that: The second hinge mechanism (41) includes two spaced hinge plates (411) and a hinge plate two (412) cooperating with the hinge plates (411). The hinge plates (411) are fixed inside the vehicle frame (1), and the hinge plate two (412) is arranged on the rear bottom guard plate (4).

Images