Active vibration suppression system for movable arm of excavator

Abstract

The invention discloses an active vibration suppression system for a movable arm of an excavator, and belongs to the technical field of excavators, the active vibration suppression system for the movable arm of the excavator comprises a movable arm mechanism, the movable arm mechanism comprises a top plate, a bottom plate and two groups of side plates, and the upper surfaces of the two groups of side plates are fixedly connected with the lower surface of the top plate; the lower surfaces of the two sets of side plates are fixedly connected with the upper surface of the bottom plate, a working arm is hinged to one end of the movable arm mechanism, and the reinforcing plate mechanism is located in the movable arm mechanism and used for improving the overall strength of the movable arm mechanism; the center connecting mechanism is located in the center of the interior of the movable arm mechanism and used for providing supporting stress for the interior of the movable arm mechanism. And the force unloading mechanism is located at the joint of the movable arm mechanism and the working arm and used for restraining vibration generated by the movable arm mechanism due to impact of the transient impact load, the force unloading mechanism comprises an arc-shaped plate, and the arc-shaped plate is movably attached to the surface of the working arm.

Description

Technical Field

[0001] The present invention relates to the technical field of excavators, and in particular to an active vibration suppression system for an excavator boom. Background Art

[0002] The excavator is composed of a working device, a platform, and a traveling device. The working device includes a boom, a dipper, a bucket, a connecting rod, a rocker, and a connecting cylinder. When working, the posture of each component of the working device is changed by changing the length of the cylinder, thereby realizing the operation of the whole machine. The boom is the main component of the front working device of the excavator. Different changes in its structural form can enable the excavator to achieve a variety of different functions, thereby meeting a variety of operating requirements.

[0003] During the construction process, the boom of the excavator often vibrates due to the impact of transient impact loads. This vibration not only affects the working performance and efficiency of the excavator, but may also cause cracks in the boom or cause its strength and rigidity to exceed the load-bearing range, thus affecting the working safety of the excavator.

[0004] Therefore, there is an urgent need to provide an active vibration suppression system for an excavator boom to solve the above problems. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the disadvantages of the prior art and provide an active vibration suppression system for an excavator boom.

[0006] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide an active vibration suppression system for an excavator boom, comprising a boom mechanism, the boom mechanism comprising a top plate, a bottom plate and two sets of side plates, the upper surfaces of the two sets of side plates are fixedly connected to the lower surface of the top plate, the lower surfaces of the two sets of side plates are fixedly connected to the upper surface of the bottom plate, one end of the boom mechanism is hinged with a working arm, and further comprising;

[0007] A reinforcing plate mechanism, which is located inside the movable arm mechanism and is used to improve the overall strength of the movable arm mechanism, and the reinforcing plate mechanism includes a connecting plate;

[0008] A central connection mechanism, the central connection mechanism is located at the inner center of the movable arm mechanism and is used to provide supporting stress to the inner part of the movable arm mechanism, and the central connection mechanism includes a central support pipe;

[0009] The unloading mechanism is located at the connection between the movable arm mechanism and the working arm, and is used to suppress the vibration of the movable arm mechanism caused by the impact of transient impact loads. The unloading mechanism includes an arc plate, and the arc plate is movably fitted with the surface of the working arm.

[0010] Further: the surface of the working arm is provided with an arc surface, one side of the arc plate is movably fitted with the arc surface, a column is fixedly installed on the other side of the arc plate, a first fixed plate is fixedly installed in the middle of one end of the top plate and the bottom plate, a through groove is opened on the surface of the first fixed plate, the column is slidably connected inside the through groove, a first spring is fixedly installed on the surface of the arc plate, the column passes through the inside of the first spring, the other end of the first spring is fixedly connected to the surface of the first fixed plate, a movable plate is slidably connected in the middle of the top plate and the bottom plate, a slide groove is opened on one side of the movable plate, a slider is fixedly installed on one end of the column, and the slider is slidably connected inside the slide groove.

[0011] Through the above technical solution, when the working arm rotates, the arc surface squeezes the arc plate. When impacted, the arc plate moves into the inside of the movable arm mechanism, thereby squeezing the column into the inside of the movable arm mechanism. The through groove on the surface of the first fixed plate provides space for the movement of the column. Under the action of the first spring, the column pushes the second fixed plate to move and can drive the slider to move up and down in the slide groove at the same time, achieving a preliminary unloading effect.

[0012] Furthermore: a second fixed plate is fixedly installed in the middle of the top plate and the bottom plate, a plurality of sliding rods are fixedly installed on the other side of the movable plate, the sliding rods are slidably connected to the inside of the second fixed plate, a plurality of second springs are fixedly installed on the other side of the movable plate, one end of the sliding rod passes through the inside of the second spring and extends to the right side of the second fixed plate, a limiting ring is fixedly installed on the right end of the sliding rod, and a certain distance is set between the limiting ring and the second fixed plate.

[0013] Through the above technical solution, the movable plate moves to the right and continuously fits with the second fixed plate, and the second spring is squeezed, thereby achieving the purpose of secondary force unloading. The movable plate moves to the right and simultaneously drives the sliding rod to move to the right. The setting of the sliding rod enables the second spring to maintain a horizontal state when being squeezed, thereby improving the force unloading effect. The setting of the limit ring prevents the sliding rod from slipping out of the second fixed plate and affecting subsequent use.

[0014] Further: the movable plate is slidably connected between the first fixed plate and the second fixed plate, and the front and rear sides of the first fixed plate and the second fixed plate are fixedly connected to the inner walls of the two side plates.

[0015] Through the above technical solution, the first fixing plate and the second fixing plate are fixedly connected to the top plate, the bottom plate and the inner walls of the side plates, thereby further improving the overall strength of the interior of the movable arm mechanism.

[0016] Furthermore: the front and rear sides of the connecting plate are fixedly connected to the inner walls of the two side panels, the upper side of the connecting plate is fixedly connected to the lower surface of the top plate, the lower side of the connecting plate is fixedly connected to the upper surface of the bottom plate, and symmetrical reinforcing ribs are fixedly installed on both sides of the connecting plate, one side of the reinforcing ribs is fixedly connected to the inner walls of the two groups of side panels, and the reinforcing ribs are arranged in a triangle shape.

[0017] Through the above technical solution, the connecting plates are respectively connected to the top plate, the bottom plate and the side plates, so as to further improve the overall strength of the boom mechanism, and the reinforcing ribs are connected to the inner walls of the side plates, so that the connection between the connecting plates and the side plates is more stable.

[0018] Furthermore: the front and rear sides of the central support tube are fixedly connected to the inner walls of the two side plates, and three groups of central support plates are fixedly installed on the surface of the central support tube. The three groups of central support plates are distributed in a ring shape, and the angle between two adjacent central support plates is set to 120 degrees.

[0019] Through the above technical solution, the central support tube cooperates with three sets of central support plates to provide supporting stress inside the boom mechanism, further improving the overall strength of the boom mechanism.

[0020] Further: the reinforcement plate mechanism is arranged in four groups, and the four groups of reinforcement plate mechanisms are symmetrically installed on the left and right sides of the central connecting mechanism.

[0021] Through the above technical solution, the reinforcing plate mechanism is evenly arranged inside the movable arm mechanism, thereby effectively improving the overall strength of the movable arm mechanism.

[0022] Furthermore: the reinforcing plate mechanism and the central connecting mechanism are entirely made of maraging steel or titanium alloy.

[0023] Through the above technical solution, the materials of the reinforcing plate mechanism and the central connecting mechanism can be set to maraging steel or titanium alloy. Maraging steel has excellent yield strength and tensile strength, and titanium alloy has the advantages of low density, high strength and corrosion resistance.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1. The present invention sets a force unloading mechanism. When the working arm rotates, the arc surface squeezes the arc plate. When impacted, the arc plate moves into the movable arm mechanism, so that the column squeezes into the movable arm mechanism. The through groove on the surface of the first fixed plate provides space for the movement of the column. Under the action of the first spring, the column pushes the second fixed plate to move and can drive the slider to move up and down in the slide groove to achieve a preliminary force unloading effect. The moving plate moves right and continuously fits the second fixed plate. The second spring is squeezed to achieve the purpose of secondary force unloading. The moving plate moves right and drives the sliding rod to move right at the same time. The setting of the sliding rod enables the second spring to maintain a horizontal state when being squeezed, thereby improving the force unloading effect.

[0026] 2. A reinforcing plate mechanism and a central connecting mechanism are provided. The connecting plates are respectively connected to the top plate, the bottom plate and the side plates to improve the overall strength of the boom mechanism. The reinforcing ribs are connected to the inner walls of the side plates to make the connection between the connecting plates and the side plates more stable. The central support pipe cooperates with three groups of central support plates to provide supporting stress inside the boom mechanism to further improve the overall strength of the boom mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the reinforcing plate mechanism of the present invention;

[0030] Figure 4 It is a schematic diagram of the structure of the central connection mechanism of the present invention;

[0031] Figure 5 It is a schematic diagram of the structure of the force unloading mechanism of the present invention;

[0032] Figure 6 For the present invention Figure 2 Enlarged view of point A in the middle.

[0033] In the figure: 1. movable arm mechanism; 11. top plate; 12. bottom plate; 13. side plate; 2. working arm; 21. arc surface; 3. reinforcing plate mechanism; 31. connecting plate; 32. reinforcing rib; 4. center connecting mechanism; 41. center support tube; 42. center support plate; 5. unloading mechanism; 51. arc plate; 52. column; 53. first spring; 54. first fixed plate; 55. through groove; 56. slider; 57. movable plate; 58. slide groove; 59. sliding rod; 501. second fixed plate; 502. second spring; 503. limiting ring. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0035] See also Figure 1-Figure 6 The present application provides an active vibration suppression system for an excavator boom, comprising a boom mechanism 1, characterized in that the boom mechanism 1 comprises a top plate 11, a bottom plate 12 and two sets of side plates 13, the upper surfaces of the two sets of side plates 13 are fixedly connected to the lower surface of the top plate 11, the lower surfaces of the two sets of side plates 13 are fixedly connected to the upper surface of the bottom plate 12, one end of the boom mechanism 1 is hinged with a working arm 2, and further comprises;

[0036] A reinforcing plate mechanism 3, which is located inside the movable arm mechanism 1 and is used to improve the overall strength of the movable arm mechanism 1. The reinforcing plate mechanism 3 includes a connecting plate 31;

[0037] like Figure 3 As shown, the front and rear sides of the connecting plate 31 are fixedly connected to the inner walls of the two side plates 13, the upper side of the connecting plate 31 is fixedly connected to the lower surface of the top plate 11, and the lower side of the connecting plate 31 is fixedly connected to the upper surface of the bottom plate 12. Symmetrical reinforcing ribs 32 are fixedly installed on both sides of the connecting plate 31, and one side of the reinforcing rib 32 is fixedly connected to the inner walls of the two sets of side plates 13, and the reinforcing rib 32 is set in a triangular shape;

[0038] In this embodiment: the connecting plate 31 connects the top plate 11, the bottom plate 12 and the side plate 13 respectively, further improving the overall strength of the boom mechanism, and the reinforcing rib 32 is connected to the inner wall of the side plate 13, making the connection between the connecting plate 31 and the side plate 13 more stable.

[0039] like Figure 2 As shown, the reinforcing plate mechanisms 3 are arranged in four groups, and the four groups of reinforcing plate mechanisms 3 are symmetrically installed on the left and right sides of the central connecting mechanism 4;

[0040] In this embodiment, the reinforcing plate mechanism 3 is evenly arranged inside the movable arm mechanism 2 , thereby effectively improving the overall strength of the movable arm mechanism 2 .

[0041] A central connection mechanism 4, which is located at the inner center of the movable arm mechanism 1 and is used to provide supporting stress to the inner part of the movable arm mechanism 1. The central connection mechanism 4 includes a central support tube 41;

[0042] like Figure 4 As shown, the front and rear sides of the central support tube 41 are fixedly connected to the inner walls of the two side plates 13, and three groups of central support plates 42 are fixedly installed on the surface of the central support tube 41. The three groups of central support plates 42 are distributed in a ring shape, and the angle between two adjacent central support plates 42 is set to 120 degrees;

[0043] In this embodiment, the central support tube 41 cooperates with the three sets of central support plates 42 to provide support stress inside the movable arm mechanism 1 , thereby further improving the overall strength of the movable arm mechanism 1 .

[0044] like Figure 2 As shown, the reinforcing plate mechanism 3 and the central connecting mechanism 4 are integrally configured to be maraging steel or titanium alloy;

[0045] In this embodiment, the materials of the reinforcing plate mechanism 3 and the central connecting mechanism 4 can be set to maraging steel or titanium alloy. Maraging steel has excellent yield strength and tensile strength, and titanium alloy has the advantages of low density, high strength, corrosion resistance, etc.

[0046] The unloading mechanism 5 is located at the connection between the movable arm mechanism 1 and the working arm 2, and is used to suppress the vibration of the movable arm mechanism 1 caused by the impact of the transient impact load. The unloading mechanism 5 includes an arc plate 51, and the arc plate 51 is movably fitted with the surface of the working arm 2;

[0047] like Figure 6 As shown, the surface of the working arm 2 is provided with an arc surface 21, one side of the arc plate 51 is movably fitted with the arc surface 21, and a column 52 is fixedly installed on the other side of the arc plate 51, a first fixed plate 54 is fixedly installed between one end of the top plate 11 and the bottom plate 12, a through groove 55 is provided on the surface of the first fixed plate 54, and the column 52 is slidably connected inside the through groove 55, a first spring 53 is fixedly installed on the surface of the arc plate 51, the column 52 runs through the inside of the first spring 53, and the other end of the first spring 53 is fixedly connected to the surface of the first fixed plate 54, a moving plate 57 is slidably connected between the top plate 11 and the bottom plate 12, a sliding groove 58 is provided on one side of the moving plate 57, a slider 56 is fixedly installed on one end of the column 52, and the slider 56 is slidably connected inside the sliding groove 58;

[0048] In this embodiment: when the working arm 2 rotates, the arc surface 21 squeezes the arc plate 51. When impacted, the arc plate 51 moves toward the inside of the movable arm mechanism 1, thereby squeezing the column 52 toward the inside of the movable arm mechanism 1. The through groove 55 on the surface of the first fixed plate 54 provides space for the movement of the column 52. Under the action of the first spring 53, the column 52 pushes the second fixed plate 501 to move and can drive the slider 56 to move up and down in the slide groove 58, thereby achieving a preliminary unloading effect.

[0049] like Figure 5As shown, a second fixed plate 501 is fixedly installed between the top plate 11 and the bottom plate 12, a plurality of sliding rods 59 are fixedly installed on the other side of the movable plate 57, the sliding rods 59 are slidably connected inside the second fixed plate 501, a plurality of second springs 502 are fixedly installed on the other side of the movable plate 57, one end of the sliding rod 59 passes through the inside of the second spring 502 and extends to the right side of the second fixed plate 501, a limiting ring 503 is fixedly installed on the right end of the sliding rod 59, and a certain distance is set between the limiting ring 503 and the second fixed plate 501;

[0050] In this embodiment: the movable plate 57 moves to the right and continuously fits with the second fixed plate 501, and the second spring 502 is squeezed, thereby achieving the purpose of secondary unloading. The movable plate 57 moves to the right and drives the sliding rod 59 to move to the right at the same time. The setting of the sliding rod 59 enables the second spring 502 to maintain a horizontal state when being squeezed, thereby improving the unloading effect. The setting of the limit ring 503 prevents the sliding rod 59 from slipping out of the second fixed plate 501 and affecting subsequent use.

[0051] like Figure 5 As shown, the movable plate 57 is slidably connected between the first fixed plate 54 and the second fixed plate 501, and the front and rear sides of the first fixed plate 54 and the second fixed plate 501 are fixedly connected to the inner walls of the two side plates 13;

[0052] In this embodiment, the first fixing plate 54 and the second fixing plate 501 are both fixedly connected to the inner walls of the top plate 11 , the bottom plate 12 and the side plates 13 , which further improves the overall strength of the interior of the boom mechanism 1 .

[0053] In this embodiment: the guide rod 14 enables the movable plate 31 to remain stable when moving up and down, and prevents the position of the movable plate 31 from shifting when moving up and down. The setting of the inclined plate 16 enables the maltose liquid that has been filtered multiple times to be collected at the bottom of the body 1, and the maltose liquid can be taken out through the discharge port 17.

[0054] When the present invention is in use, the working arm 2 rotates, and the arc surface 21 squeezes the arc plate 51. When the movable arm mechanism 2 is impacted by a transient impact load and vibrates, the arc plate 51 moves toward the inside of the movable arm mechanism 1, thereby squeezing the column 52 toward the inside of the movable arm mechanism 1. The through groove 55 on the surface of the first fixed plate 54 provides space for the movement of the column 52. Under the action of the first spring 53, the column 52 pushes the second fixed plate 501 to move and can drive the slider 56 to move up and down in the slide groove 58, thereby achieving a preliminary unloading effect. The movable plate 57 moves to the right and continuously fits with the second fixed plate 501, and the second spring 502 is squeezed, thereby achieving the purpose of secondary unloading. The movable plate 57 moves to the right and drives the sliding rod 59 to move to the right at the same time. The setting of the sliding rod 59 enables the second spring 502 to maintain a horizontal state when being squeezed, thereby improving the unloading effect.

[0055] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An active vibration suppression system for an excavator boom, comprising a boom mechanism (1), characterized in that: The movable arm mechanism (1) comprises a top plate (11), a bottom plate (12) and two groups of side plates (13), the upper surfaces of the two groups of side plates (13) are fixedly connected to the lower surface of the top plate (11), and the lower surfaces of the two groups of side plates (13) are fixedly connected to the upper surface of the bottom plate (12), one end of the movable arm mechanism (1) is hingedly connected to a working arm (2), and further comprises: A reinforcing plate mechanism (3), the reinforcing plate mechanism (3) being located inside the movable arm mechanism (1) and being used to improve the overall strength of the movable arm mechanism (1), the reinforcing plate mechanism (3) comprising a connecting plate (31); A central connection mechanism (4), the central connection mechanism (4) is located at the inner center of the movable arm mechanism (1) and is used to provide supporting stress to the inner part of the movable arm mechanism (1), and the central connection mechanism (4) comprises a central support tube (41); A force unloading mechanism (5) is located at the connection between the movable arm mechanism (1) and the working arm (2) and is used to suppress vibration of the movable arm mechanism (1) caused by the impact of a transient impact load. The force unloading mechanism (5) comprises an arc plate (51) which is movably fitted to the surface of the working arm (2).

2. An active vibration suppression system for an excavator boom according to claim 1, characterized in that; The surface of the working arm (2) is provided with an arc surface (21), one side of the arc plate (51) is movably fitted with the arc surface (21), a column (52) is fixedly installed on the other side of the arc plate (51), a first fixing plate (54) is fixedly installed between one end of the top plate (11) and the bottom plate (12), a through groove (55) is opened on the surface of the first fixing plate (54), the column (52) is slidably connected inside the through groove (55), and the surface of the arc plate (51) is fixedly installed with a first fixing plate (54). A first spring (53) is fixedly installed, the column (52) passes through the inside of the first spring (53), the other end of the first spring (53) is fixedly connected to the surface of the first fixed plate (54), a movable plate (57) is slidably connected between the top plate (11) and the bottom plate (12), a sliding groove (58) is opened on one side of the movable plate (57), and a sliding block (56) is fixedly installed on one end of the column (52), and the sliding block (56) is slidably connected inside the sliding groove (58).

3. The active vibration suppression system for an excavator boom according to claim 2, characterized in that: A second fixed plate (501) is fixedly installed between the top plate (11) and the bottom plate (12); a plurality of sliding rods (59) are fixedly installed on the other side of the movable plate (57); the sliding rods (59) are slidably connected to the inside of the second fixed plate (501); a plurality of second springs (502) are fixedly installed on the other side of the movable plate (57); one end of the sliding rod (59) passes through the inside of the second spring (502) and extends to the right side of the second fixed plate (501); a limiting ring (503) is fixedly installed on the right end of the sliding rod (59); a certain distance is set between the limiting ring (503) and the second fixed plate (501).

4. The active vibration suppression system for an excavator boom according to claim 2, characterized in that: The movable plate (57) is slidably connected between the first fixed plate (54) and the second fixed plate (501), and the front and rear sides of the first fixed plate (54) and the second fixed plate (501) are fixedly connected to the inner walls of the two side plates (13).

5. The active vibration suppression system for an excavator boom according to claim 1, characterized in that: The front and rear sides of the connecting plate (31) are fixedly connected to the inner walls of the two side plates (13); the upper side of the connecting plate (31) is fixedly connected to the lower surface of the top plate (11); the lower side of the connecting plate (31) is fixedly connected to the upper surface of the bottom plate (12); symmetrical reinforcing ribs (32) are fixedly installed on both sides of the connecting plate (31); one side of the reinforcing rib (32) is fixedly connected to the inner walls of the two groups of side plates (13); and the reinforcing rib (32) is arranged in a triangular shape.

6. The active vibration suppression system for an excavator boom according to claim 1, characterized in that: The front and rear sides of the central support tube (41) are fixedly connected to the inner walls of the two side plates (13); three groups of central support plates (42) are fixedly installed on the surface of the central support tube (41); the three groups of central support plates (42) are distributed in a ring shape, and the angle between two adjacent central support plates (42) is set to 120 degrees.

7. The active vibration suppression system for an excavator boom according to claim 6, characterized in that: The reinforcing plate mechanisms (3) are arranged in four groups, and the four groups of reinforcing plate mechanisms (3) are symmetrically installed on the left and right sides of the central connecting mechanism (4).

8. The active vibration suppression system for an excavator boom according to claim 7, characterized in that: The reinforcing plate mechanism (3) and the central connecting mechanism (4) are made entirely of maraging steel or titanium alloy.

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