阅读说明：本技术 照明装置和工程机械 (Lighting device and construction machine ) 是由 卢加林 李志锋 马先锋 于 2020-06-30 设计创作，主要内容包括：一种照明装置和工程机械,照明装置包括：第一基部和第二基部,第一基部与第二基部通过第一枢转轴连接；凸轮,设置在第一基部上,凸轮和第一基部共同绕第一枢转轴转动；推杆,沿推杆的长度方向可滑动地设置在第二基部上,推杆的第一端由凸轮限位,凸轮驱动推杆沿推杆的长度方向运动；摇杆,通过第二枢转轴与第二基部枢转连接,推杆的第二端由摇杆限位,推杆驱动摇杆围绕第二枢转轴转动；照明灯具,设置在摇杆上,照明灯具的灯光方向随摇杆的转动而改变。照明灯具随第一基部的转动而改变方向,实现了照明灯具的灯光追踪第一基部的运动,且照明装置的结构为机械传动,可靠性更高。(A lighting device and a construction machine, the lighting device includes: the first base and the second base are connected through a first pivot shaft; a cam disposed on the first base, the cam and the first base rotating together about a first pivot axis; the push rod is slidably arranged on the second base part along the length direction of the push rod, the first end of the push rod is limited by the cam, and the cam drives the push rod to move along the length direction of the push rod; the rocker is pivotally connected with the second base through a second pivot shaft, the second end of the push rod is limited by the rocker, and the push rod drives the rocker to rotate around the second pivot shaft; the lighting lamp is arranged on the rocker, and the light direction of the lighting lamp is changed along with the rotation of the rocker. The direction of the lighting lamp changes along with the rotation of the first base, so that the light of the lighting lamp tracks the movement of the first base, and the lighting device is in mechanical transmission structure and has higher reliability.)

1. An illumination device, comprising:

a first base and a second base, the first base connected to the second base by a first pivot shaft;

a cam (10) disposed on the first base, the cam (10) and the first base rotating together about the first pivot axis;

the push rod (20) is arranged on the second base in a sliding mode, the first end of the push rod is limited by the cam (10), and the cam (10) drives the push rod (20) to move along the length direction of the push rod;

a rocker (30) pivotally connected to the second base by a second pivot axis (70), a second end of the push rod (20) being restrained by the rocker (30), the push rod (20) driving the rocker (30) to rotate about the second pivot axis (70);

and the lighting lamp (40) is arranged on the rocker (30), and the light direction of the lighting lamp (40) is changed along with the rotation of the rocker (30).

2. The lighting device of claim 1, further comprising a return spring (50) connected between the rocker (30) and the second base, wherein a force exerted by the return spring (50) on the rocker (30) is in a direction opposite to a driving force exerted by the push rod (20) on the rocker (30).

3. The lighting device of claim 1,

a second mounting hole is formed in the rocker (30) along the axial direction of the second pivot shaft (70), a second end of the push rod (20) comprises a second connecting rod extending along the axial direction of the second pivot shaft (70), and the second connecting rod penetrates through the second mounting hole;

the push rod (20) comprises a first roller (21) arranged at the first end of the push rod, and the first roller (21) is abutted with the outer edge of the cam (10);

the lighting device further comprises a return spring (50) connected between the rocker (30) and the second base, the return spring (50) applying a force to the rocker (30) that moves the rocker (30) towards the push rod (20).

4. The lighting device of claim 1,

the push rod (20) comprises a second roller arranged at the second end, and the second roller is abutted with the outer edge of the rocker (30);

a first mounting hole is formed in the cam (10) in the axial direction of the first pivot shaft, the first mounting hole is an arc-shaped long hole with the first pivot shaft as the center, the radian of the first mounting hole corresponds to the outer edge of the cam (10), a first end of the push rod (20) comprises a first connecting rod extending in the axial direction of the first pivot shaft, and the first connecting rod penetrates through the first mounting hole;

the lighting device further comprises a return spring (50) connected between the rocker (30) and the second base, the return spring (50) applying a force to the rocker (30) that moves the rocker (30) towards the push rod (20).

5. The lighting device of claim 1,

the push rod (20) comprises a first roller (21) arranged at the first end of the push rod, and the first roller (21) is abutted with the outer edge of the cam (10);

the push rod (20) comprises a second roller arranged at the second end, and the second roller is abutted with the outer edge of the rocker (30);

the lighting device further comprises a return spring (50) connected between the rocker (30) and the second base, the return spring (50) applying a force to the rocker (30) that moves the rocker (30) towards the push rod (20).

6. The lighting device of claim 1,

a first mounting hole is formed in the cam (10) in the axial direction of the first pivot shaft, the first mounting hole is an arc-shaped long hole with the first pivot shaft as the center, the radian of the first mounting hole corresponds to the outer edge of the cam (10), a first end of the push rod (20) comprises a first connecting rod extending in the axial direction of the first pivot shaft, and the first connecting rod penetrates through the first mounting hole;

a second mounting hole is formed in the rocker (30) along the axial direction of the second pivot shaft (70), the second end of the push rod (20) comprises a second connecting rod extending along the axial direction of the second pivot shaft (70), and the second connecting rod penetrates through the second mounting hole.

7. The lighting device of claim 6, further comprising a return spring (50) connected between the rocker (30) and the second base, the return spring (50) applying a force to the rocker (30) that moves the rocker (30) toward or away from the pushrod (20).

8. The lighting device according to any one of claims 1 to 7, further comprising a sleeve (60), the sleeve (60) being disposed on the second base, the push rod (20) being disposed within the sleeve (60).

9. The lighting device as claimed in claim 3 or 5, wherein the push rod (20) further comprises a buffer spring (22), the buffer spring (22) is sleeved on the body of the push rod (20), and the first roller (21) is connected with the buffer spring (22).

10. A working machine, characterized by comprising a machine body, a movable arm (100), a working arm (200) and a working part (300), wherein a first end of the movable arm (100) is pivotally connected with the machine body, a second end of the movable arm (100) is pivotally connected with a first end of the working arm (200), and a second end of the working arm (200) is connected with the working part (300); the working machine further comprises a lighting device according to any one of claims 1 to 9, the boom (100) being a second base of the lighting device, the work arm (200) being a first base of the lighting device, the light direction of the light fixture (40) being directed towards the work portion (300).

Technical Field

The invention relates to the field of industrial machinery, in particular to a lighting device and engineering machinery.

Background

For engineering machinery such as an excavator, good illumination is required in the construction process to ensure safety and smooth construction.

In a working part of a construction machine, for example, a bucket of an excavator, since the working part is directly constructed, it is necessary to illuminate the working part with emphasis.

In a construction machine having a boom such as an excavator, since the position of a working portion changes at any time, it is necessary for an illumination device to have the ability to track the working portion.

The existing excavator collects the actions of the bucket or the operating rod through a sensor, then calculates the illumination position of the illumination lamp through a computer, and then controls a servo motor to drive the illumination lamp to turn.

The electric control structure is complex and has insufficient reliability, and if a sensor makes a mistake or a computer makes a mistake, the lighting lamp cannot normally turn to a correct position, and illumination cannot be provided.

Disclosure of Invention

The invention aims to provide a lighting device which can realize the steering of a lighting lamp through mechanical transmission, so that the light of the lighting lamp is aligned with a working tool, and reliable lighting is provided.

Another object of the present invention is to provide a construction machine, wherein the lighting device of the present invention provides lighting for the working portion, and the lighting device realizes transmission through the machine, so that the construction machine is more reliable.

The invention is realized by the following steps:

an illumination device, comprising: the first base and the second base are connected through a first pivot shaft; a cam disposed on the first base, the cam and the first base rotating together about a first pivot axis; the push rod is slidably arranged on the second base part along the length direction of the push rod, the first end of the push rod is limited by the cam, and the cam drives the push rod to move along the length direction of the push rod; the rocker is pivotally connected with the second base through a second pivot shaft, the second end of the push rod is limited by the rocker, and the push rod drives the rocker to rotate around the second pivot shaft; the lighting lamp is arranged on the rocker, and the light direction of the lighting lamp is changed along with the rotation of the rocker.

When the first base part and the second base part rotate around the first pivot shaft, the cam rotates relative to the second base part, the cam drives the push rod to move, the push rod drives the rocker to move around the second pivot shaft, so that the lighting lamp arranged on the rocker rotates, the direction of the lighting lamp is changed along with the rotation of the first base part, the light of the lighting lamp tracks the movement of the first base part, and the lighting device is structurally in mechanical transmission and higher in reliability.

An engineering machine comprises a machine body, a movable arm, a working arm and a working part, wherein a first end of the movable arm is pivotally connected with the machine body, a second end of the movable arm is pivotally connected with a first end of the working arm, and a second end of the working arm is connected with the working part; the engineering machinery also comprises the lighting device, the movable arm is a first base part of the lighting device, the working arm is a second base part of the lighting device, and the light direction of the lighting lamp faces the working part.

When the working arm rotates around the first pivot shaft, the motion track of the working part relative to the first pivot shaft is an arc, the direction of the lighting lamp arranged on the movable arm is changed along with the rotation of the working arm through the transmission of the cam, the push rod and the rocker, the lighting direction of the lighting lamp always faces the working part, and stable and reliable lighting is provided for the working part.

The invention has the following beneficial effects: the direction of the lighting lamp changes along with the rotation of the first base, so that the light of the lighting lamp tracks the movement of the first base, and the lighting device is in mechanical transmission structure and has higher reliability.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a lighting device according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1 in accordance with an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1 according to an embodiment of the present invention;

FIG. 4 is a schematic illustration of a work machine according to an embodiment of the present disclosure in a first state;

FIG. 5 is a schematic illustration of a work machine according to an embodiment of the present disclosure in a second state;

FIG. 6 is a schematic illustration of a work machine according to an embodiment of the present disclosure in a third state;

fig. 7 is a schematic view of a construction machine according to an embodiment of the present invention in a fourth state.

In the figure:

10. a cam; 20. a push rod; 21. a first roller; 22. a buffer spring; 30. a rocker; 40. a lighting fixture; 50. a return spring; 60. a sleeve; 61. a sleeve clamp; 70. a second pivot shaft; 100. a movable arm; 200. a bucket arm; 300. a working part; 400. a cylindrical pin; 500. and (7) a pin shaft.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

The invention provides a lighting device.

First embodiment, referring to fig. 1 to 3, the present embodiment provides an illumination device, which includes a first base and a second base connected by a first pivot shaft, and the illumination device of the present embodiment is installed on an excavator, so that the first base is a boom 200 of the excavator, and the second base is a movable boom 100 of the excavator; the lighting device further comprises a cam 10 fixedly mounted on the arm 200, and a pivot axis between the cam 10 and the movable arm 100 is coincident with the first pivot axis; the lighting device further comprises a push rod 20 and a sleeve 60, the sleeve 60 is fixed on the movable arm 100 through a sleeve clamp 61, the push rod 20 is arranged in the sleeve 60 in a penetrating mode, and the push rod 20 can move along the length direction of the sleeve 60, namely along the length direction of the push rod 20; the lighting device further includes a rocker 30 and a light fixture 40, the rocker 30 is disposed on the movable arm 100 through the second pivot shaft 70, and the light fixture 40 is disposed on the rocker 30 and changes direction as the rocker 30 rotates.

The first end of the push rod 20 abuts against the outer edge of the cam 10, so that when the cam 10 rotates, the cam 10 can push the push rod 20 to move towards the rocker 30; the second end of the push rod 20 is connected to the rocker 30, and when the push rod 20 moves, the push rod 20 can drive the rocker 30 to rotate around the second pivot shaft 70, so as to drive the lighting fixture 40 to rotate, thereby changing the lighting direction.

In the present embodiment, the arm 200 and the boom 100 are connected by the cylindrical pin 400, and the axis of the cylindrical pin 400 is the axis of the first pivot shaft.

The lighting apparatus further includes a return spring 50, as shown in fig. 1 and 2, one end of the return spring 50 is connected to the movable arm 100, and the other end is connected to the rocker 30. As shown in fig. 1, when the push rod 20 pushes the rocker 30 to rotate clockwise, the return spring 50 is stretched and applies a pulling force toward counterclockwise rotation to the rocker 30, and when the pushing force of the push rod 20 is removed, the rocker 30 can rotate counterclockwise back to the initial position by the pulling force of the return spring 50.

In this embodiment, the push rod 20 includes a buffer spring 22, the buffer spring 22 is sleeved on the body of the push rod 20, and the first roller 21 is connected to the buffer spring 22.

As shown in fig. 1, the left end of the push rod 20 is inserted into the buffer spring 22, the first roller 21 is slidably connected to the push rod 20, and the end of the first roller 21 abuts against the buffer spring 22, so that when the first roller 21 moves to the right under the action of the cam 10, the buffer spring 22 is compressed first, and then the push rod 20 is pushed to move to the right.

In the work, the impact that the scraper bowl that receives as work portion 300 can transmit for arm 200 produces the tremble of shortfall, if push rod 20 is the rigidity, then this kind of shortfall tremble can transmit rocker 30, and the effect of reaction on lighting lamp 40 rocks for light is quick, and light rocks for a long time and can cause staff's visual fatigue, influences work efficiency.

Therefore, the push rod 20 has certain flexibility through the buffer spring 22 in the embodiment, the tremble of the bucket arm 200 is buffered through the buffer spring 22, the rocking rod 30 is not transmitted, the light of the lighting lamp is prevented from shaking, the illumination of the lighting lamp 40 is more stable, and the change of the illumination direction is smoother.

The push rod 20 includes a first roller 21 disposed at a first end thereof, and as shown in fig. 3, the first roller 21 abuts against an outer edge of the cam 10. The first roller 21 is a concave wheel, which can avoid the dislocation of the first roller 21 and the cam 10.

A second mounting hole is formed in the rocker 30 along the axial direction of the second pivot shaft 70, and the second end of the push rod 20 includes a second connecting rod extending along the axial direction of the second pivot shaft 70, and the second connecting rod is inserted into the second mounting hole.

The second end of push rod 20 has the U-shaped connecting piece, and partly stretching into in the U-shaped mouth of U-shaped connecting piece of rocker 30, the second mounting hole just is arranged in the U-shaped mouth, and the second connecting rod is for wearing to establish the bolt 500 on the U-shaped connecting piece, and bolt 500 penetrates in the second mounting hole simultaneously to make push rod 20 and rocker 30 interconnect, and can rotate around the second connecting rod between push rod 20 and the rocker 30.

The U-shaped connecting piece is connected with the body of the push rod 20 through threads, so that the position of the U-shaped connecting piece on the push rod 20, namely the whole length of the push rod 20, can be finely adjusted by rotating the U-shaped connecting piece.

Fig. 4 shows a minimum angle state between the boom 100 and the arm 200, in which an included angle between the boom 100 and the arm 200 is an acute angle, an illumination direction of the illumination lamp 40 is perpendicular to the arm 200, and if a direction from the second pivot axis 70 to the first pivot axis is a forward direction, a bucket as the working portion 300 is located in a lateral forward direction of the illumination lamp 40, and an included angle between the illumination direction of the illumination lamp 40 and the forward direction is a first acute angle.

Fig. 5 shows an intermediate angle state between the boom 100 and the arm 200, in which the angle between the boom 100 and the arm 200 is a right angle, and at this time, the bucket as the working portion 300 is located in the lateral front of the lamp 40, the angle between the lighting direction of the lamp 40 and the front direction is a second acute angle, and the angle of the second acute angle is smaller than the angle of the first acute angle.

Fig. 6 shows a maximum angle state between the boom 100 and the arm 200, in which an obtuse angle is formed between the boom 100 and the arm 200, and at this time, the bucket as the working portion 300 is located in a lateral front direction of the lamp 40, an angle between a lighting direction of the lamp 40 and a front direction is a third acute angle, and an angle of the third acute angle is smaller than an angle of the second acute angle.

Under extreme conditions, the boom 100 and the arm 200 are at a straight angle, that is, the arm 200 is at a straight line with the boom 100, and at this time, the bucket as the working part 300 is located right in front of the lighting fixture 40, the lighting fixture 40 illuminates right in front, and the included angle between the illumination direction and the right in front is substantially zero.

In a second embodiment, a lighting device includes a first base and a second base, the first base and the second base connected by a first pivot shaft; a cam disposed on the first base, the cam and the first base rotating together about a first pivot axis; the push rod is slidably arranged on the second base part along the length direction of the push rod, the first end of the push rod is connected with the cam, and the cam drives the push rod to move along the length direction of the push rod; the rocker is pivotally connected with the second base through a second pivot shaft, the second end of the push rod is limited by the rocker, and the push rod drives the rocker to rotate around the second pivot shaft; the lighting lamp is arranged on the rocker, and the light direction of the lighting lamp is changed along with the rotation of the rocker.

The push rod comprises a second roller arranged at the second end, and the second roller is abutted with the outer edge of the rocker; the cam is provided with a first mounting hole along the axial direction of the first pivot shaft, the first mounting hole is an arc-shaped long hole which takes the first pivot shaft as a center, the radian of the first mounting hole corresponds to the outer edge of the cam, the first end of the push rod comprises a first connecting rod which extends along the axial direction of the first pivot shaft, and the first connecting rod is arranged in the first mounting hole in a penetrating mode.

The lighting device further includes a return spring connected between the rocker and the second base, the return spring applying a force to the rocker to move the rocker toward the pushrod.

Compared with the first embodiment, the structure of the first end of the push rod is opposite to that of the second end, the first end of the push rod is provided with a U-shaped connecting piece, one part of the cam extends into a U-shaped opening of the U-shaped connecting piece, the first mounting hole is located in the U-shaped opening, the first connecting rod is a bolt penetrating through the U-shaped connecting piece, and penetrates into the first mounting hole simultaneously, so that the push rod is connected with the cam, and the push rod and the cam can rotate around the first connecting rod.

In the embodiment, the cam can not only push the push rod to move towards the rocker, but also pull the push rod to move away from the rocker.

In a third embodiment, a lighting device includes a first base and a second base, the first base being pivotally connected to the second base by a first pivot axis; the cam is arranged on the first base, and a pivot axis between the cam and the second base is coincided with the axis of the first pivot shaft; the push rod is slidably arranged on the second base part along the length direction of the push rod, the first end of the push rod is limited by the cam, and the cam drives the push rod to move along the length direction of the push rod; the rocker is pivotally connected with the second base through a second pivot shaft, the second end of the push rod is limited by the rocker, and the push rod drives the rocker to rotate around the second pivot shaft; the lighting lamp is arranged on the rocker, and the light direction of the lighting lamp is changed along with the rotation of the rocker.

The push rod comprises a first roller arranged at the first end of the push rod, and the first roller is abutted with the outer edge of the cam; the push rod comprises a second roller arranged at the second end, and the second roller is abutted to the outer edge of the rocker.

The lighting device further includes a return spring connected between the rocker and the second base, the return spring applying a force to the rocker to move the rocker toward the pushrod.

Compared with the first embodiment, the first end and the second end of the push rod are both in a butt joint structure, namely a double-roller structure, and the push rod is in butt joint with the outer edge of the cam through the first roller and is in butt joint with the outer edge of the rocker through the second roller.

The push rod structure of this embodiment is simpler, between U-shaped connecting piece cam and the push rod to and all not through bolt structural connection between rocker and the push rod, but through gyro wheel structure butt, and through reset spring's pulling force, the push rod can maintain and between the cam and with the rocker between inseparable butt, can play driven effect.

In this embodiment, the first roller is connected with the push rod through a screw thread, or the second roller is connected with the push rod through a screw thread, so that the function of finely adjusting the length of the push rod is realized.

In a fourth embodiment, a lighting device includes a first base and a second base, the first base being pivotally connected to the second base by a first pivot axis; a cam disposed on the first base, the cam and the first base rotating together about a first pivot axis; the push rod is slidably arranged on the second base part along the length direction of the push rod, the first end of the push rod is connected with the cam, and the cam drives the push rod to move along the length direction of the push rod; the rocker is pivotally connected with the second base through a second pivot shaft, the second end of the push rod is connected with the rocker, and the push rod drives the rocker to rotate around the second pivot shaft; the lighting lamp is arranged on the rocker, and the light direction of the lighting lamp is changed along with the rotation of the rocker.

The cam is provided with a first mounting hole along the axial direction of the first pivot shaft, the first mounting hole is an arc-shaped long hole taking the first pivot shaft as a center, the radian of the first mounting hole corresponds to the outer edge of the cam, the first end of the push rod comprises a first connecting rod extending along the axial direction of the first pivot shaft, and the first connecting rod is arranged in the first mounting hole in a penetrating manner; a second mounting hole is formed in the rocker in the axial direction of the second pivot shaft, the second end of the push rod comprises a second connecting rod extending in the axial direction of the second pivot shaft, and the second connecting rod penetrates through the second mounting hole.

Compared with the first embodiment, the two ends of the push rod of the embodiment are not provided with the rollers, but are tightly connected with the cam through the first connecting rod, namely, the double-pin connecting structure is tightly connected with the rocker through the second connecting rod.

The connecting structure of the push rod and the cam and the connecting structure of the rocker are in bidirectional force application connection, the cam can push the push rod and can also pull the push rod, the rocker can push the push rod and can also pull the push rod, and therefore a reset spring is not required to be arranged.

Fifth embodiment a fifth embodiment is based on the fourth embodiment and is provided with a return spring connected between the rocker and the second base, the return spring applying a force to the rocker to move the rocker towards or away from the push rod.

Because the connection structure of push rod and cam and with the rocker is two-way application of force and is connected, consequently reset spring's restoring force actually plays the effect of pretension, through setting up reset spring for the push rod is inseparabler, the reaction is rapider with being connected of cam, makes the push rod inseparabler, the reaction is rapider with being connected of rocker.

It should be noted that the above-mentioned return spring may be not only the structure indicated in the figures, but any spring structure capable of generating an elastic force may be used as the return spring, such as a coil spring.

The invention also provides engineering machinery.

As shown in fig. 4 to 7, the construction machine is an excavator and includes a body, a boom 100, an arm 200, and a working part 300, wherein the working part 300 is a bucket, a first end of the boom 100 is pivotally connected to the body, a second end of the boom 100 is pivotally connected to a first end of the arm 200, and a second end of the arm 200 is connected to the bucket.

The construction machine further includes the lighting device boom 100 as a second base of the lighting device, the arm 200 as a first base of the lighting device, and the light direction of the lighting fixture 40 is directed toward the working part 300.

Fig. 4 shows a first state of the excavator, that is, a retracted state of the arm 200, in which an angle between the boom 100 and the arm 200 is minimum, an included angle between the boom 100 and the arm 200 is acute, an illumination direction of the illumination lamp 40 is perpendicular to the arm 200, and if a direction from the second pivot axis 70 to the first pivot axis is a forward direction, a bucket as the working portion 300 is located in a lateral forward direction of the illumination lamp 40 at this time, and an included angle between the illumination direction of the illumination lamp 40 and the forward direction is a first acute angle.

Fig. 5 shows a second state of the excavator, that is, a normal operation state of the arm 200, in which the angle between the boom 100 and the arm 200 is a right angle, and at this time, the bucket as the working part 300 is located in the lateral front of the lamp 40, the angle between the lighting direction of the lamp 40 and the frontal direction is a second acute angle, and the angle of the second acute angle is smaller than that of the first acute angle.

Fig. 6 shows a third state of the excavator, that is, a maximum spread state of the arm 200, in which the boom 100 and the arm 200 form an obtuse angle, the bucket as the working portion 300 is positioned in front of the lighting fixture 40, an angle between the lighting direction of the lighting fixture 40 and the front direction is a third acute angle, and the angle of the third acute angle is smaller than the angle of the second acute angle.

Fig. 6 shows a fourth state of the excavator, that is, a state in which the bucket of the excavator is at the deepest working depth, which the excavator enters when digging down, the angular relationship between the boom 100 and the arm 200, and the illumination direction of the illumination lamp 40 are the same as those in the third state shown in fig. 5.

The construction machine according to the present invention is not limited to an excavator, and a construction machine having a boom and an arm structure may be provided with illumination using the illumination device according to the present invention, and the working portion may be a hammer or the like.

In conclusion, the direction of the lighting lamp of the lighting device changes along with the rotation of the first base part, so that the light of the lighting lamp tracks the movement of the first base part, and the lighting device is mechanically driven and has higher reliability. The engineering machinery adopting the lighting device can realize light tracking and the movement of the light tracking working part of the lighting lamp, and provide stable lighting.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.