CN214832975U - Excavator swing arm front fork structure and excavator - Google Patents

Abstract

The utility model provides an excavator swing arm front fork structure and excavator relates to excavator technical field. Excavator swing arm front fork structure, include along controlling two risers that the direction set up relatively and be located the connecting plate between two risers, the riser includes riser body and protrusion structure, protrusion structure is followed control the direction to being close to one side protrusion of connecting plate in the riser body sets up, protrusion structure is suitable for the realization the connecting plate with the position location of riser, the connecting plate respectively with two the riser welding. The utility model discloses excavator swing arm front fork structure realizes the position location of connecting plate and riser and welds connecting plate and riser as an organic whole through the protrusion structure, can realize the connecting plate respectively with the reliable connection of riser, the protrusion structure can enough realize the position location of connecting plate, improves location and welding precision, can also increase the area of contact of connecting plate and riser, reinforcing structural stability, the reliability is high.

Description

Excavator swing arm front fork structure and excavator

Technical Field

The utility model relates to an excavator technical field particularly, relates to an excavator swing arm front fork structure and machine of digging.

Background

The movable arm of the excavator is hinged with the bucket rod through the front fork, the front fork structure of the movable arm of the excavator is stressed complexly, and the structural stability of the front fork structure is directly related to the service life of the movable arm and the safety performance of the excavator.

However, the existing movable arm front fork structure still has disadvantages, for example, the existing movable arm front fork structure generally includes two vertical plates and a connecting plate, the connecting plate is located between the two vertical plates, and two ends of the connecting plate are respectively welded with the two vertical plates, and the welding precision is not easy to be guaranteed, and the structural performance may be unstable.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving the weak point of how to improve excavator motor arm front fork structure among the correlation technique to a certain extent, improve the structural stability's of excavator motor arm front fork structure problem.

For at least one aspect in solving above-mentioned problem to a certain extent at least, the utility model provides an excavator swing arm front fork structure, include along controlling two risers that the direction set up relatively and being located the connecting plate between two risers, the riser includes riser body and protrusion structure, protrusion structure is followed control the direction to being close to one side protrusion in the riser body setting of connecting plate, protrusion structure is suitable for the realization the connecting plate with the position location of riser, the connecting plate respectively with two the riser welding.

From this, at first realize the position location of connecting plate and riser through protruding structure, then weld connecting plate and riser as an organic whole, can realize the connecting plate respectively with the reliable connection of riser, on the one hand, the position location of connecting plate can be realized to protruding structure, improves location and welding precision, on the other hand, the area of contact of connecting plate and riser can be increased in the setting of protruding structure, the stress stability that reinforcing connecting plate and riser are connected, the reliability is high, the practicality is strong.

Optionally, in the left-right direction, adjacent ends of the protruding structure and the connecting plate are respectively provided with a first positioning structure and a second positioning structure, and the positioning of the connecting plate and the vertical plate is achieved through the first positioning structure and the second positioning structure.

Therefore, the first positioning structure and the second positioning structure are arranged, so that the contact area of the connecting plate and the vertical plate can be increased to a certain extent, and the structural stability of connection of the connecting plate and the vertical plate is enhanced.

Optionally, the protruding structure includes a protruding structure body and a boss disposed on an end surface of the protruding structure body, and the first positioning structure is the boss;

the second positioning structure is a side wall of the connecting plate in the direction perpendicular to the left-right direction, or the second positioning structure is a groove structure arranged on the end face of the connecting plate close to one end of the vertical plate, and the boss is in insertion fit with the groove structure;

or, the protruding structure comprises a protruding structure body and a groove structure arranged on the end face of the protruding structure body, the first positioning structure is the groove structure, the second positioning structure is a boss arranged on the connecting plate close to the end face of one end of the vertical plate, and the boss is in plug-in fit with the groove structure.

Therefore, on one hand, the boss and/or groove structure can realize reliable positioning of the connection of the connecting plate and the vertical plate, and the contact surface of the connecting plate and the vertical plate is increased; on the other hand, can reduce the span of connecting plate to a certain extent (that is the connecting plate along the distance between the strong point of left right direction on two risers), strengthen the force stability of front fork structure to, empty welding that the metal liquid dropped the result in and welding strength low grade problem when can avoiding the welding to a certain extent.

Optionally, the connecting plate is a bending plate, and the contour shape of the boss and/or the groove structure is matched with the bending shape of the bending plate.

Therefore, the connecting plate is a bending plate, the two ends of the bending plate in the left and right directions have larger contact areas with the vertical plate, the connecting plate and the vertical plate are connected, and the connecting plate is high in structural stability and strong in practicability.

Optionally, the projection of the connecting plate on the riser body is entirely located within a range covered by the projection of the protruding structure on the riser body.

The arrangement has the advantages that the connecting plate and the protruding structure have larger contact surfaces, longer weld joint length can be obtained to a certain extent, and the connection reliability of the connecting plate and the protruding structure is high; and, at this moment, for the connecting plate directly with this body coupling of riser, the span of connecting plate is littleer, and connecting plate and riser welded operating space are also bigger, and the practicality is strong.

Optionally, the protruding structure includes a first side wall, the first side wall is a side wall of the protruding structure in a direction perpendicular to the left-right direction, the first side wall is suitable for being attached to the connecting plate, and the connecting plate is welded to the riser body.

The advantage that sets up like this lies in, first face structure, second face structure and third face structure all have the welded connection relation with the movable arm apron, and its connection structure is reliable to, adopt the fillet weld problem that welding defect appears easily between connecting plate and the riser to a certain extent.

Optionally, two ends of each vertical plate in the vertical direction are respectively provided with a notch structure for positioning the movable arm cover plate, and each notch structure comprises a first surface structure located in the front-back direction and a third surface structure connected with the first surface structure and located in the vertical direction;

the connecting plate comprises a second surface structure, and the second surface structure is arranged at one end, close to the notch structure, of the connecting plate along the front-back direction;

the first surface structure, the third surface structure and the second surface structure are suitable for being welded with the movable arm cover plate.

The arrangement has the advantages that the connecting plate has a larger contact surface with the protruding structure, a longer welding seam length can be obtained to a certain extent, and the connection reliability of the connecting plate and the protruding structure is high; and, at this moment, for the connecting plate directly with this body coupling of protruding structure, the span of connecting plate is littleer, the connecting plate with riser welded operation space is also bigger, and the practicality is strong.

Optionally, the first and second face structures are flush;

and/or, along the up-down direction, the surface of the vertical plate is flush with the outer surface of the movable arm cover plate;

and/or the outer surface of the connecting plate at the position adjacent to the second surface structure is flush with the outer surface of the movable arm cover plate along the up-down direction.

The movable arm cover plate has the advantages that the end faces of the movable arm cover plate are welded with the first surface structure and the second surface structure respectively along the front and back directions, the position difference that the complex end face structure is suitable for the first surface structure and the second surface structure is avoided, and the welding seam structure is simple; and/or, the polishing and surface treatment at the welding position after welding are facilitated, stress concentration is avoided to a certain extent, and the structural stability is high; and when the three groups of surfaces are level respectively, the surface of the front fork structure along the vertical direction is of a whole surface structure, a welding seam welded with the movable arm cover plate is simple, and after polishing and processing, the surface of the movable arm of the excavator along the vertical direction is of a whole surface structure, so that stress concentration is avoided to a certain extent, the stress stability of the movable arm of the excavator is high, and the practicability is high.

The reinforcing plate is respectively connected with the connecting plate and the vertical plates, the structural rigidity of the front fork structure can be enhanced, in addition, to a certain extent, the U-shaped structure, the reinforcing plate and the two vertical plates are connected and integrally form a structure similar to a box body, the structural stability of the front fork structure is high, and the practicability is high.

Optionally, the vertical plate is integrally forged.

The advantage that sets up like this lies in, riser structural stability is high, the protruding structure with the riser body is difficult for separating because of reasons such as atress to the reliability of front fork structure is high.

Another aspect of the present invention provides an excavator, including the excavator swing arm front fork structure as described above. The excavator has all the advantages of the front fork structure of the excavator arm, and the detailed description is omitted.

Drawings

Fig. 1 is a schematic structural view of a front fork structure of an excavator boom according to an embodiment of the present invention;

fig. 2 is another schematic structural view of a front fork structure of an excavator boom according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of the connection between the connection plate and the movable arm cover plate according to the embodiment of the present invention.

Description of reference numerals:

1-vertical plate, 11-vertical plate body, 12-convex structure, 121-convex structure body, 122-boss, 13-notch structure, 131-first surface structure, 132-third surface structure, 14-mounting hole structure, 2-connecting plate, 21-first plate body, 22-second plate body, 23-middle connecting structure, 24-second surface structure, 3-reinforcing plate and 4-movable arm cover plate.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description herein, references to the terms "an embodiment," "one embodiment," "some embodiments," "exemplary" and "one embodiment," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or embodiment is included in at least one embodiment or embodiment of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or implementation. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or implementations.

The terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

In the drawings, the Z-axis represents the vertical, i.e., up-down, position, and the positive direction of the Z-axis (i.e., the arrow of the Z-axis points) represents up, and the negative direction of the Z-axis (i.e., the direction opposite to the positive direction of the Z-axis) represents down; in the drawings, the X-axis represents a horizontal direction and is designated as a left-right position, and a positive direction of the X-axis (i.e., an arrow direction of the X-axis) represents a right side and a negative direction of the X-axis (i.e., a direction opposite to the positive direction of the X-axis) represents a left side; in the drawings, the Y-axis indicates the front-rear position, and the positive direction of the Y-axis (i.e., the arrow direction of the Y-axis) indicates the front side, and the negative direction of the Y-axis (i.e., the direction opposite to the positive direction of the Y-axis) indicates the rear side; it should also be noted that the foregoing Z-axis, Y-axis, and X-axis representations are merely intended to facilitate the description of the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

As shown in fig. 1 and fig. 2, the embodiment of the utility model provides an excavator swing arm front fork structure, include along controlling two risers 1 that the direction set up relatively and being located two connecting plates 2 between the riser 1, riser 1 includes riser body 11 and protrusion structure 12, protrusion structure 12 along controlling the direction to the one side protrusion that is close to connecting plate 2 in riser body 11 setting, protrusion structure 12 is suitable for the position location that realizes connecting plate 2 and riser 1, connecting plate 2 welds with two risers 1 respectively.

It should be noted that although the front-back direction, the left-right direction, and the up-down direction are defined in the present description, the directions may be changed during the specific use process, and the present invention is not limited thereto. Specifically, the front end of the front fork structure is suitable for being connected with the bucket rod, as shown in fig. 1, mounting hole structures 14 are respectively provided at one ends of the two vertical plates 1 along the Y-axis positive direction, and the mounting hole structures 14 of the two vertical plates 1 are used for being hinged to the bucket rod through a pin.

It should be noted that, in this specification, the connecting plate 2 is taken as a bending plate, the bending plate integrally forms a U-shaped structure, and along the front-back direction, an end of the U-shaped structure where the opening direction deviates from the bucket rod (i.e., an end of the mounting hole structure 14) is taken as an example to illustrate the content of the present invention. However, the shape and number of the link plates 2 are not limited, and for example, the link plates 2 may be provided as flat plates, both of which are extended in the front-rear direction, and both of which are opposed in the up-down direction (i.e., the Z-axis direction in the drawing).

As shown in fig. 1 and fig. 2, it should be noted that the bending plate includes a first plate 21 and a second plate 22 which are disposed opposite to each other in the vertical direction, and an intermediate connecting structure 23 for connecting the first plate 21 and the second plate 22, where the first plate 21 is located above the second plate 22 (i.e., located in the positive direction of the Z axis). In this specification, the case where the connecting plate 2 is connected to the vertical plate 1 will be described by taking as an example the case where the vertical plate 1 located on the right side (i.e., the vertical plate 1 located in the positive direction of the X axis, which will be referred to as a right vertical plate) is connected to the first plate body 21.

Exemplarily, the protruding structure 12 includes a first side wall, and the first side wall is a side wall in a direction perpendicular to the left-right direction on the protruding structure 12, and the first side wall is suitable for being attached to the connecting plate 2, and the connecting plate 2 is welded to the riser body 11.

Specifically, the connecting plate 2 is interposed between the two vertical plates 1, and when the first plate 21 contacts with the protruding structure 12 of the right vertical plate and the first plate 21 contacts with the vertical plate body 11 of the right vertical plate, the first plate 21 and the right vertical plate are welded together (not shown in the figure). At this time, the protruding structure 12 is exemplarily located below the first plate body 21, the first side wall is an upper side wall of the protruding structure 12, and the first plate body 21 is welded together with the riser body 11 of the right riser (welded from above), and of course, the lower surface of the first plate body 21 may also be welded together with the protruding structure 12 (welded from below).

From this, at first realize the position location of connecting plate 2 and riser 1 through protrusion structure 12, then weld connecting plate 2 and riser 1 as an organic whole, can realize connecting plate 2 respectively with riser 1's reliable connection, on the one hand, protrusion structure 12 can realize the position location of connecting plate 2, improve location and welding precision, on the other hand, protrusion structure 12's setting can increase the area of contact of connecting plate 2 and riser 1, strengthen the force stability that connecting plate 2 and riser 1 are connected, the reliability is high, therefore, the clothes hanger is strong in practicability.

In this embodiment, along the left-right direction, the adjacent ends of the protruding structure 12 and the connecting plate 2 are respectively provided with a first positioning structure and a second positioning structure, and the positioning of the connecting plate 2 and the vertical plate 1 is realized through the first positioning structure and the second positioning structure.

The specific structure of the first positioning structure and the second positioning structure is not limited, and will be described in detail later.

The benefit that sets up like this lies in, sets up first location structure and second location structure and can increase the area of contact of connecting plate 2 and riser 1 to a certain extent, strengthens the structural stability that the two is connected.

As shown in fig. 1 and 2, in some embodiments, the protruding structure 12 includes a protruding structure body 121 and a boss 122 disposed on an end surface of the protruding structure body 121, and the first positioning structure is the boss 122; the second positioning structure is a side wall in the direction perpendicular to the left-right direction on the connecting plate 2.

As shown in fig. 1 and fig. 2, specifically, taking the connection between the first plate 21 and the right vertical plate as an example, the boss 122 is disposed to protrude from the end surface of the protruding structure body 121 toward a side close to the connecting plate 2 along the left-right direction, the upper side wall of the boss 122 is disposed at a preset distance from the upper side wall of the protruding structure body 121, the second positioning structure is the lower side wall of the connecting plate 2, and the lower side wall of the connecting plate 2 is attached to the upper side wall of the boss 122, so as to achieve the positioning of the connection between the connecting plate 2 and the vertical plate 1, and in the following, the connection between the connecting plate 2 and the vertical plate 1 and the movable arm cover plate 4 will be described in this specification, and details will not be described here. It should be noted that, at this time, the upper side wall of the first plate body 21 may be flush with the upper side wall of the protruding structure body 121, or the end surface of the first plate body 21 in the left-right direction may be set to be a stepped surface structure, and the upper side wall of the first plate body 21 is welded to the left end surface of the vertical plate body 11 of the right vertical plate.

In other embodiments, the second positioning structure is a groove structure disposed on an end surface of the connecting plate 2 near the vertical plate 1, and the boss 122 is in plug-in fit with the groove structure. Specifically, the groove structure is recessed in the end face of the connection plate 2 in the left-right direction. It also enables a secure positioning of the connection of the connecting plate 2 and the vertical plate 1 (not shown in this solution).

Different from the two above-mentioned modes of realizing the location that connecting plate 2 and riser 1 are connected, protruding structure 12 includes protruding structure body 121 and sets up the groove structure on protruding structure body 121 terminal surface, and first location structure is groove structure, and second location structure is for setting up in connecting plate 2 near the boss 122 of riser 1 one end terminal surface, and boss 122 and groove structure are pegged graft and are cooperated (not shown in this scheme), and this place will not be described in detail again.

In some embodiments, the protrusion structure 12 can be provided with either the protrusion 122 or the groove structure, and of course, the structure of the end of the connecting plate 2 connected to the vertical plate 1 should be changed accordingly, and will not be described in detail here.

The arrangement has the advantages that on one hand, the boss 122 and/or the groove structure can realize reliable positioning of the connection of the connecting plate 2 and the vertical plate 1, and the contact surface of the connecting plate 2 and the vertical plate 1 is increased; on the other hand, can reduce the span of connecting plate 2 to a certain extent (that is to say connecting plate 2 along the distance between the strong point of left right direction on two risers 1), strengthen the force stability of front fork structure to, empty welding that the metal liquid dropped the result in and welding strength low grade problem can be avoided when welding to a certain extent.

As shown in fig. 1 and 2, the connecting plate 2 is a bending plate, and the contour shape of the boss 122 and/or the groove structure matches with the bending shape of the bending plate.

That is to say, the board of bending is the U-shaped structure, and boss 122 and groove structure are whole to be the U-shaped structure, and each part that the board of bending is bent all realizes the location through boss 122.

The benefit that sets up like this lies in, connecting plate 2 is for the board of bending to the board of bending all has great area of contact with riser 1 along the both ends of controlling the direction, and the structural stability that connecting plate 2 and riser 1 are connected is high, and the practicality is strong.

As shown in fig. 1 and fig. 2, the projection of the connecting plate 2 on the riser body 11 is entirely located within the range covered by the projection of the protruding structure 12 on the riser body 11.

As shown in fig. 2, for example, the connection plate 2 is integrally bent into a U-shaped structure, the protruding structure 12 is integrally U-shaped, and an end surface of the connection plate 2 along the X-axis direction is attached to the protruding structure 12 (the attachment is an ideal state, and in actual operation, beveling may be required for welding). That is, the cross-sectional shape of the protruding structure 12 is the same as that of the connecting plate 2, and both are U-shaped structures, so that the structural rigidity of the front fork structure can be enhanced, and the excessive weight of the front fork structure is avoided.

The arrangement has the advantages that the connecting plate 2 and the protruding structure 12 have larger contact surfaces, a longer welding seam length can be obtained to a certain extent, and the connection reliability of the connecting plate 2 and the protruding structure 12 is high; and, at this moment, directly be connected with riser body 11 for connecting plate 2, the span of connecting plate 2 is littleer, and connecting plate 2 is also bigger with 1 welded operating space of riser, and the practicality is strong.

As shown in fig. 1, fig. 2 and fig. 3, in the embodiment of the present invention, two ends of each vertical plate 1 along the up-down direction are respectively provided with a notch structure 13 for positioning the movable arm cover plate 4, and the notch structure 13 includes a first surface structure 131 located in the front-back direction and a third surface structure 132 connected to the first surface structure 131 and located in the up-down direction; the connecting plate 2 comprises a second surface structure 24, and the second surface structure 24 is arranged at one end of the connecting plate 2 close to the notch structure 13 along the front-back direction; the first face structure 131, the third face structure 132, and the second face structure 24 are each adapted to be welded to the boom cover 4.

Specifically, two movable arm cover plates 4 are distributed along the up-down direction, after the connecting plate 2 is welded with the vertical plate 1, the movable arm cover plates 4 move relative to the vertical plate 1, when the movable arm cover plates 4 are in contact with the first surface structure 131 and the third surface structure 132 of the notch structure 13, the movable arm cover plates 4 are also in contact with the second surface structure 24 of the connecting plate 2, and then the contact positions of the second surface structure 24 and the movable arm cover plates 4, the contact positions of the first surface structure 131 and the movable arm cover plates 4, and the contact positions of the third surface structure 132 and the movable arm cover plates 4 are welded, so that the connecting plate 2 and the vertical plate 1 are respectively and reliably connected with the movable arm cover plates 4.

From this, first face structure 131, second face structure 24 and third face structure 132 all have the welded connection relation with movable arm apron 4, and its connection structure is reliable to, adopt the problem that fillet welding appears welding defect easily between connecting plate 2 and the riser 1 to a certain extent.

As shown in fig. 1, in the present embodiment, the first face structure 131 and the second face structure 24 are flush.

It should be noted that beveling or other processing may be required during welding, and the leveling may be approximate to leveling, specifically, a contact surface of the first surface structure 131 and the movable arm cover plate 4 is coplanar with a contact surface of the second surface structure 24 and the movable arm cover plate 4, that is, an end surface structure of the movable arm cover plate 4 close to the connecting plate 2 is a planar structure, and the end surface structure does not need to be set to be a step structure to adapt to a position difference of the first surface structure 131 and the second surface structure 24 in the length direction of the riser 1, and this will not be described in detail here.

From this, along fore-and-aft direction, the terminal surface of movable arm apron 4 welds with first facial structure 131 and second facial structure 24 respectively, has avoided setting up the position difference of complicated terminal surface structure adaptation first facial structure 131 and second facial structure 24, and welding seam simple structure has reduced the welding degree of difficulty to a certain extent, has improved structural stability.

As shown in fig. 1 and 3, in the above embodiment, the surface of the riser 1 is flush with the outer surface of the boom cover 4 in the up-down direction.

It is to be understood that, in some embodiments, the surface of the riser 1 and the outer surface of the boom cover 4 may be curved structures in the up-down direction, and at this time, the surface of the riser 1 and the outer surface of the boom cover 4 are flush, which is to be understood as the surface of the riser 1 and the boom cover 4 at the welding position of the first face structure 131 is flush.

Therefore, polishing and surface treatment after welding are facilitated, stress concentration is avoided to a certain extent, and structural stability is high.

As shown in fig. 1, in the above embodiment, the outer surface of the connecting plate 2 at the position adjacent to the second surface structure 24 is flush with the outer surface of the boom cover 4 in the up-down direction.

In the present specification, the outer surface of the connecting plate 2 refers to a surface of the connecting plate 2 close to the outer portion of the boom of the excavator, and the outer surface of the boom cover 4 is similar to this, and will not be described in detail here.

In some embodiments, when the three groups of surfaces are respectively level, the surface of the front fork structure along the vertical direction is a whole surface structure, and then the front fork structure is welded with the movable arm cover plate 4, and the surface of the welded part is level, after polishing and processing, the surface of the movable arm of the excavator along the vertical direction is a whole surface structure, so that stress concentration is avoided to a certain extent, the stress stability of the movable arm of the excavator is high, and the practicability is high.

In the above embodiment, as shown in fig. 2, the structure further includes a reinforcing plate 3, the reinforcing plate 3 is at least partially accommodated in the U-shaped structure, and the reinforcing plate 3 is connected to the connecting plate 2 and the vertical plate 1 respectively.

Illustratively, both ends of the reinforcing plate 3 in the left-right direction (i.e., the X-axis direction) are respectively connected (welded) to the two vertical plates 1, and both ends of the reinforcing plate 3 in the up-down direction (i.e., the Z-axis direction) are respectively connected (welded) to the first plate body 21 and the second plate body 22.

Here, it should be noted that the vertical plate 1 may also be provided with a structure for positioning the reinforcing plate 3, the connecting plate 2 may also be provided with a structure for positioning the reinforcing plate 3, and the connecting plate 2 and the reinforcing plate 3 may be provided with a through hole structure, which may be a lightening hole or an observation hole, without affecting the rigidity of the overall structure, and the details are not described here.

The benefit that sets up like this lies in, and reinforcing plate 3 is connected with connecting plate 2 and riser 1 respectively, can strengthen the structural rigidity of front fork structure to, to a certain extent, U-shaped structure, reinforcing plate 3 and two risers 1 are connected and wholly form the structure of similar box, and the structural stability of front fork structure is high, and the practicality is strong.

In the above embodiment, the vertical plate 1 is integrally forged.

The benefit that sets up like this lies in, riser 1 structural stability is high, and protruding structure 12 and riser body 11 are difficult for separating because of reasons such as atress to the reliability of front fork structure is high.

Another embodiment of the present invention provides an excavator, including the front fork structure of the excavator arm as above. The excavator has all the benefits of the front fork structure of the excavator arm, and the details are not described herein.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and such changes and modifications will fall within the scope of the present invention.

Claims (10)

1. The utility model provides an excavator swing arm front fork structure, its characterized in that includes two riser (1) that set up relatively along left right direction and is located connecting plate (2) between two riser (1), riser (1) include riser body (11) and protrusion structure (12), protrusion structure (12) are followed left right direction to being close to one side protrusion in riser body (11) setting of connecting plate (2), protrusion structure (12) are suitable for the realization connecting plate (2) with the position location of riser (1), connecting plate (2) respectively with two riser (1) welding.

2. The excavator boom fork structure of claim 1, wherein in said left-right direction, adjacent ends of said projecting structure (12) and said connecting plate (2) are provided with a first positioning structure and a second positioning structure, respectively, by which the positioning of the positions of said connecting plate (2) and said riser (1) is achieved.

3. The excavator arm fork structure of claim 2, wherein the projecting structure (12) comprises a projecting structure body (121) and a boss (122) provided on an end face of the projecting structure body (121), and the first positioning structure is the boss (122);

the second positioning structure is a side wall of the connecting plate (2) in the direction perpendicular to the left-right direction, or the second positioning structure is a groove structure arranged on the end face of the connecting plate (2) close to one end of the vertical plate (1), and the boss (122) is in insertion fit with the groove structure;

or, the protruding structure (12) comprises a protruding structure body (121) and a groove structure arranged on the end face of the protruding structure body (121), the first positioning structure is the groove structure, the second positioning structure is a boss (122) arranged on the connecting plate (2) and close to the end face of one end of the vertical plate (1), and the boss (122) is in plug-in fit with the groove structure.

4. Excavator boom fork structure according to claim 3, characterized in that the connection plate (2) is a bent plate, the contour shape of the boss (122) and/or the groove structure matching the bent shape of the bent plate.

5. Excavator boom fork structure according to any of claims 1 to 4, characterized in that the projection of the attachment plate (2) on the riser body (11) is entirely within the range covered by the projection of the projecting structure (12) on the riser body (11).

6. The excavator arm fork structure of any one of claims 1 to 4, wherein the projecting structure (12) comprises a first side wall, the first side wall is a side wall of the projecting structure (12) in a direction perpendicular to the left-right direction, the first side wall is adapted to be fitted with the connecting plate (2), and the connecting plate (2) and the riser body (11) are welded.

7. The excavator arm front fork structure according to any one of claims 1 to 4, wherein each vertical plate (1) is provided with a notch structure (13) for positioning a movable arm cover plate (4) at both ends in the up-down direction, and the notch structure (13) comprises a first surface structure (131) in the front-back direction and a third surface structure (132) connected with the first surface structure (131) and in the up-down direction;

the connecting plate (2) comprises a second face structure (24), and the second face structure (24) is arranged at one end, close to the notch structure (13), of the connecting plate (2) along the front-back direction;

the first face structure (131), the third face structure (132) and the second face structure (24) are all suitable for being welded with a movable arm cover plate (4).

8. Excavator motor arm fork structure according to claim 7, wherein the first face structure (131) and the second face structure (24) are flush;

and/or the surface of the vertical plate (1) is flush with the outer surface of the movable arm cover plate (4) along the up-down direction;

and/or the outer surface of the connecting plate (2) at the position adjacent to the second surface structure (24) is flush with the outer surface of the movable arm cover plate (4) along the up-down direction.

9. The excavator arm fork structure of any one of claims 1 to 4 wherein the riser (1) is integrally forged.

10. An excavator comprising an excavator boom fork structure as claimed in any one of claims 1 to 9.

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