Front hood and hood door opening mechanism for loader

Abstract

The present invention relates to a front hood and hood door opening mechanism for a loader, comprising a frame weld, a front hood door assembly, a gas spring, a buffer pad, a connecting pin, a lower side plate, and a door lock assembly; the front hood door assembly is symmetrically mounted on the frame weld, one end of each front hood door assembly is connected to the frame weld by a hinge, and the other end is guided and connected to a guide plate on the side of the frame weld by a guide bracket and a connecting pin, and a gas spring is also connected between the upper cover plate and the frame weld in the front hood door assembly, and the lower side of the frame weld is equipped with a lower side plate and a door lock assembly. The front hood and hood door opening mechanism for a loader provided by the present invention, through the rotation characteristics of two sets of hinges, the elasticity of the gas spring, and the limiting function between the connecting pin and the guide plate, the entire hood door will not exceed the hood width during opening and closing, and is easy to open, and provides a spacious repair and maintenance space.

Description

Technical Field

[0001] The invention relates to a front cover and a cover door opening mechanism for a loader, belonging to the technical field of loader covers for engineering machinery. Background Art

[0002] The main function of the loader hood is to protect the engine, water tank, electrical and other related parts from damage by external forces, and at the same time play a role in sound insulation and noise reduction. During daily use of the loader, it is necessary to repair and maintain the internal parts of the hood, so the hood needs to be opened frequently. At present, the mainstream loader hoods on the market are composed of a front hood and a rear hood. The rear hood can be designed with a set of hinged hood doors that open outwards according to the structure; the front hood is affected by the layout of the whole machine, such as the attached Figure 1 As shown, a rear fender 1 and a handrail 2 are provided at the outer side, and the hood door cannot be opened outward. The conventional front hood adopts a small assembled cover plate 3 to solve the maintenance and repair problems. The fixing bolts need to be removed before maintenance of the structure, and the space is limited, maintenance is difficult, and the efficiency is extremely low. Summary of the invention

[0003] The purpose of the present invention is to provide a front hood and hood door opening mechanism for a loader, wherein the front hood does not increase the width dimension of the hood when the hood door is opened. The front hood hood door is easy to open, has a large maintenance space after opening, and is convenient for maintenance.

[0004] In order to achieve the above invention object, the present invention adopts the following technical scheme:

[0005] A front hood and hood door opening mechanism for a loader, comprising a frame weld, a front hood door assembly, a gas spring, a buffer pad, a connecting pin shaft, a lower side plate, and a door lock assembly; the front hood door assembly is symmetrically mounted on the frame weld, one end of each front hood door assembly is connected to the frame weld by a hinge, and the other end is guided and connected to a guide plate on the side of the frame weld by a guide bracket and a connecting pin shaft, and a gas spring is also connected between the upper cover plate in the front hood door assembly and the frame weld, and the lower side plate and the door lock assembly are mounted on the lower side of the frame weld.

[0006] Furthermore, the frame is welded with a lock plate for fixing the front cover door assembly at a symmetrical position in the middle, two sets of guide plates are respectively provided on the door frames on both sides, a lock plate for fixing the hood is provided at the lower end of the door frame, and a reinforcing balance beam is provided at the bend of the door frame.

[0007] Furthermore, a buffer pad mounting hole is provided at the upper end of the door frame, a gas spring lower mounting seat is provided at the upper end of the reinforced balance beam, and a hinge mounting hole is provided at the upper end of the lock plate.

[0008] Furthermore, the guide plate is provided with a long waist-shaped hole, and the two guide plates are symmetrically arranged on both sides of the welded frame.

[0009] Furthermore, the front cover door assembly includes a hood door panel weld, an upper cover, a first set of hinges connecting the hood door panel weld and the upper cover, a second set of hinges connecting the upper cover and the frame weld, and a pair of guide brackets arranged on the inner side of the hood door panel weld.

[0010] Furthermore, a gas spring upper mounting seat is provided at the lower end of the upper cover plate; and a door handle for opening is welded on the hood door panel.

[0011] Furthermore, when the hood door is closed, the connecting pin is located at the lowermost end of the long waist hole of the guide plate; when the hood door is opened, the connecting pin is located at the uppermost end of the long waist hole of the guide plate.

[0012] Furthermore, the hood door opening mechanism realizes the hood door being welded and opened vertically upwards by means of the expansion and contraction of a gas spring and the rotation of two sets of hinges, and does not exceed the size of the hood, while providing a spacious repair and maintenance space.

[0013] Furthermore, a buffer pad is installed on the frame weld to avoid rigid contact when the door is closed, which causes impact vibration.

[0014] Furthermore, during the entire opening process of the hood door, the angle formed between the upper cover plate and the hood door welded together gradually decreases from 90°; and the angle between the upper cover plate 52 and the horizontal plane gradually decreases from 180°.

[0015] The beneficial effects of the present invention are:

[0016] Compared with the traditional loader front cover structure, the front cover and hood door opening mechanism for the loader of the present invention has a front cover door welded and connected to the upper cover plate through a set of hinges, and the upper cover plate is connected to the front cover frame through another set of hinges to form a front cover door assembly. With the help of the gas spring, the front cover door does not exceed the width of the hood during the entire opening process. The front cover has a simple structure, the hood door is easy to open, and the maintenance space is large, which is deeply loved by market users. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the position structure of the front cover of a traditional loader;

[0018] Figure 2 A three-dimensional diagram of the front hood and hood door opening mechanism for a loader provided by the present invention;

[0019] Figure 3 for Figure 2 The three-dimensional diagram of the welding of the middle front cover frame;

[0020] Figure 4 for Figure 2 A perspective view of the center hood door assembly;

[0021] Figure 5 It is a schematic diagram of the hood door of the present invention when it is closed;

[0022] Figure 6 This is a schematic diagram of the hood door of the present invention when it is opened;

[0023] Figure 7 for Figure 2 Stereoscopic view of the middle guide plate;

[0024] Figure numerals: 1. rear fender; 2. armrest; 3. small cover plate; 4. frame welding; 5. front cover door assembly; 6. gas spring; 7. buffer pad; 8. connecting pin; 9. lower side plate; 10. door lock assembly; 41. door frame; 42. lock plate; 43. reinforced balance beam; 44. lock plate; 45. guide plate; 46. gas spring lower mounting seat; 51. hood door panel welding; 52. upper cover plate, 53. first set of hinges, 54. second set of hinges; 511. door handle; 512. guide bracket; 521. spring upper mounting seat. DETAILED DESCRIPTION

[0025] In order to make the present invention more obvious and easy to understand, a preferred embodiment is provided. The left and right sides of this embodiment are symmetrical and have the same functional structure. This embodiment is described in detail with reference to the left side and the accompanying drawings as follows.

[0026] like Figure 2 As shown, a front cover and hood door opening mechanism for a loader provided by the present invention comprises a frame weld 4, a front cover door assembly 5, a gas spring 6, a buffer pad 7, a connecting pin 8, a lower side plate 9, and a door lock assembly 10. The front cover door assembly 5 is symmetrically mounted on the frame weld 4, one end of each front cover door assembly 5 is connected to the frame weld 4 through a hinge, and the other end is connected to the guide plate on the side of the frame weld 4 through a guide bracket and a connecting pin 8, and a gas spring 6 is also connected between the upper cover plate 52 of the front cover door assembly 5 and the frame weld 4, and the lower side of the frame weld 4 is equipped with a lower side plate 9 and a door lock assembly 10.

[0027] like Figure 3 As shown, the skeleton welding 4 includes a door frame 41, a lock plate 42 for fixing the hood, a reinforced balance beam 43 for improving the strength, a lock plate 44 for fixing the front cover door assembly 5 is provided at a middle symmetrical position, and two groups of guide plates 45 are provided on the door frame 41; a buffer pad 7 mounting hole is provided at the upper end of the door frame 41, a gas spring lower mounting seat 46 is provided at the upper end of the reinforced balance beam 43, a hinge mounting hole is provided at the upper end of the lock plate 42, and a long waist-shaped hole is provided on the guide plate 45. The guide plate 45 provided on the door frame 41 is required to overlap in the longitudinal section projection of the front cover to avoid jamming when opening.

[0028] like Figure 4As shown, (taking the left side as an example) the front cover door assembly 5 includes a hood door panel weld 51, an upper cover plate 52, a first set of hinges 53 connecting the hood door panel weld 51 and the upper cover plate 52, and a second set of hinges 54 connecting the upper cover plate 52 and the frame weld 4; the hood door panel weld 51 is provided with a door handle 511 for opening, and a pair of guide brackets 512; the lower end of the upper cover plate 52 is provided with a gas spring upper mounting seat 521.

[0029] When opening the hood door, the hood door is opened gradually from bottom to top through the telescopic characteristics of the gas spring and the rotation characteristics of the hinge. During the whole process, the connecting pin gradually rises from the lowest position of the waist hole of the guide plate to the highest position, and the upper cover plate rotates synchronously through the hinge.

[0030] Preferably, the frame-welded middle door frames are respectively provided with guide plates for limiting the moving path of the hood door assembly when it is opened.

[0031] Preferably, the guide plate is provided with a long waist-shaped hole.

[0032] Preferably, the hood door welded and the upper cover plate in the front hood door panel assembly are connected together by a set of hinges, and then fixed to the hood frame by another hinge, and gas springs are provided on the upper cover plate and the front hood frame.

[0033] Optimally, a buffer pad is installed at the upper end of the hood frame to avoid large vibrations and abnormal noises when the hood door is closed.

[0034] Preferably, the connecting pin moves between the long waist holes of the guide plate.

[0035] Preferably, when the hood door is opened, it is opened vertically upward along the side of the front hood by a gas spring.

[0036] Preferably, during the opening process of the hood door, the angle formed between the hood upper cover plate and the hood door gradually decreases from 90°; and the angle between the upper cover plate and the horizontal plane gradually decreases from 180°.

[0037] The method for opening the front hood door comprises the following steps: when the hood door is closed (such as Figure 5 As shown), the connecting pin 8 is located at the lowermost position of the guide plate 45 (as shown Figure 7 As shown in the figure, the operator opens the hood door lock assembly 10 and pulls the door handle 511 vertically upward for a distance. With the help of the expansion and contraction of the gas spring and the rotation of the two sets of hinges, the hood door panel weld 51 gradually opens to the maximum position (as shown in the figure). Figure 6 As shown), the connecting pin 8 is located at the uppermost position of the guide plate 45 (as shown Figure 7During the whole process, the connecting pin moves in the waist-shaped hole of the guide plate, and the waist-shaped hole is used to limit the moving path of the hood door when it is opened. Similarly, the closing process is opposite to the opening process, and the hood door will not exceed the original width of the hood during the opening and closing process. This solves the problem that the front hood cannot be designed to open the hood door outward due to the limitation of the whole machine.

[0038] In summary: The above only takes the left side of the embodiment of the technical solution of the present invention as a detailed description, which should not be used to limit the scope of the present invention, that is, all simple equivalent changes and modifications made according to the claims of the present invention and the contents of the invention description should still fall within the scope covered by the patent of the present invention.

Claims

1. A front hood and hood door opening mechanism for a loader, characterized in that: The invention comprises a frame weld (4), a front cover door assembly (5), a gas spring (6), a buffer pad (7), a connecting pin (8), a lower side plate (9), and a door lock assembly (10); the front cover door assembly (5) is symmetrically mounted on the frame weld (4); one end of each front cover door assembly (5) is connected to the frame weld (4) through a hinge, and the other end is connected to a guide plate on the side of the frame weld (4) through a guide bracket and a connecting pin (8); a gas spring (6) is also connected between the upper cover plate (52) in the front cover door assembly (5) and the frame weld (4); and the lower side of the frame weld (4) is mounted with a lower side plate (9) and a door lock assembly (10).

2. The front cover and hood door opening mechanism for a loader according to claim 1, characterized in that: The frame weld (4) is provided with a lock plate (44) for fixing the front cover door assembly (5) at a symmetrical position in the middle, and two groups of guide plates (45) are respectively provided on the door frames (41) at both sides. The lower end of the door frame (41) is provided with a lock plate (42) for fixing the hood, and a reinforcing balance beam (43) is provided at the bending part of the door frame (41).

3. The front cover and hood door opening mechanism for a loader according to claim 2, characterized in that: The upper end of the door frame (41) is provided with a buffer pad (7) mounting hole, the upper end of the reinforced balance beam (43) is provided with a gas spring lower mounting seat (46), and the upper end of the lock plate (42) is provided with a hinge mounting hole.

4. The front cover and hood door opening mechanism for a loader according to claim 1, characterized in that: The guide plate (45) is provided with a long waist-shaped hole, and the two guide plates (45) are symmetrically arranged on both sides of the frame weld (4).

5. The front cover and hood door opening mechanism for a loader according to claim 1, characterized in that: The front cover door assembly (5) comprises a hood door panel weld (51), an upper cover plate (52), a first set of hinges (53) connecting the hood door panel weld (51) and the upper cover plate (52), a second set of hinges (54) connecting the upper cover plate (52) and the frame weld (4), and a pair of guide brackets (512) arranged on the inner side of the hood door panel weld (51).

6. The front cover and hood door opening mechanism for a loader according to claim 5, characterized in that: A gas spring upper mounting seat (521) is provided at the lower end of the upper cover plate (52); and a door handle (511) for opening is provided on the welding joint of the hood door panel (51).

7. The front cover and hood door opening mechanism for a loader according to claim 1, characterized in that: When the hood door is closed, the connecting pin shaft (8) is located at the lowermost end of the long waist hole of the guide plate (45); when the hood door is opened, the connecting pin shaft (8) is located at the uppermost end of the long waist hole of the guide plate (45).

8. The front cover and hood door opening mechanism for a loader according to claim 1, characterized in that: The hood door opening mechanism realizes the vertical upward opening of the hood door panel weld (51) by means of the expansion and contraction of the gas spring (6) and the rotation of two sets of hinges, and does not exceed the size of the hood, while providing a spacious repair and maintenance space.

9. The front cover and hood door opening mechanism for a loader according to claim 1, characterized in that: A buffer pad (7) is installed on the frame weld (4) to prevent rigid contact when the door is closed, thereby preventing impact vibration.

10. The front cover and hood door opening mechanism for a loader according to claim 1, characterized in that: During the entire opening process of the hood door, the angle formed between the upper cover plate (52) and the hood door panel weld (51) gradually decreases from 90°; and the angle between the upper cover plate (52) and the horizontal plane gradually decreases from 180°.

Images