Excavator and bucket rod thereof

Abstract

The utility model relates to an excavator and provides an excavator and a bucket rod thereof in order to solve the problem that a bucket oil cylinder of the excavator is prone to being impacted and damaged in a limited space, and the bucket rod comprises two parallel bucket rod web plates which are arranged in a left-right spaced mode. The two bucket rod web plates are sequentially provided with an accessory pivoting hole, a rocker pivoting hole, a bucket oil cylinder pivoting hole and a movable arm pivoting hole from the front part to the rear part, and a bucket oil cylinder mounting space for accommodating the bucket oil cylinder and allowing the bucket oil cylinder to swing is formed between the two bucket rod web plates; web connecting pieces are arranged in front of and behind the bucket oil cylinder mounting space between the two bucket rod webs; and the left and right ends of the web connecting piece are correspondingly welded with the two bucket rod webs. In the utility model, the bucket oil cylinder can be mounted in the bucket oil cylinder mounting space between the two bucket rod webs of the bucket rod, so that the bucket oil cylinder cannot be damaged due to collision in some working places with limited space.

Description

Technical Field

[0001] The utility model relates to an excavator, and more particularly to an excavator and a bucket arm thereof. Background Art

[0002] The excavator's working device consists of a boom, an arm, and attachments. The arm is hinged to the front of the boom via a pin. A boom cylinder is connected between the boom and the arm. The cylinder extends and retracts, pushing the arm back and forth around the front of the boom. The attachment is hinged to the front of the arm. A bucket cylinder and rocker assembly are located between the arm and the attachment. The bucket head cylinder extends and retracts, pushing the attachment back and forth around the front of the arm via the rocker assembly.

[0003] In existing structures, the bucket arm is a box-shaped structure, with the bucket cylinder located on the upper side of the arm's top plate. With this layout, when operating in confined spaces such as basements and tunnels, the bucket cylinder and its connecting pipes are prone to colliding with obstacles such as walls during rotation and when the arm swings forward to open, potentially damaging the machine. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the bucket cylinder of the existing excavator is easily damaged by impact in a confined space, and an excavator and a bucket arm thereof are provided.

[0005] The technical solution for achieving the purpose of the utility model is: a boom for an excavator, the boom comprising two parallel boom webs spaced apart from each other, the two boom webs being sequentially provided with attachment pivot holes, rocker pivot holes, bucket cylinder pivot holes and boom pivot holes from front to rear, a bucket cylinder installation space being provided between the two boom webs for accommodating and swinging the bucket cylinder; web connectors being provided between the two boom webs in front of and at the rear of the bucket cylinder installation space; the left and right ends of the web connector being welded to the two boom webs accordingly.

[0006] In the boom of the present invention, the front and / or rear web connectors include connecting tubes welded to the two boom webs at their respective ends. The connecting tubes are coaxially arranged with corresponding pivot holes in the attachment pivot holes and boom pivot holes on the two boom webs. Furthermore, the front and / or rear web connectors include reinforcing ribs welded to both the corresponding connecting tubes and the two boom webs.

[0007] In the boom of the present invention, the web connecting parts at the front and / or rear can also be composed of annular bent plates, the axial ends of which are welded to the two boom webs and surround the corresponding pivot holes in the accessory pivot hole and the boom pivot hole.

[0008] In the bucket arm of the utility model, a rear upper connecting plate and / or a rear lower connecting plate are provided between the two bucket arm webs;

[0009] The rear upper connecting plate is located above the bucket cylinder pivot hole and its left and right ends are correspondingly welded to the two bucket arm webs, its rear end extends to the top of the boom pivot hole, and its front end extends to the front and top of the bucket cylinder pivot hole;

[0010] The rear lower connecting plate is located below the bucket cylinder pivot hole and its left and right ends are welded to the two boom webs respectively. Its rear end extends to the bottom of the boom pivot hole, and its front end extends to the front and bottom of the bucket cylinder pivot hole.

[0011] In the bucket arm of the utility model, each bucket arm web is a flat box-shaped structure composed of two left and right side plates arranged in parallel and spaced apart, and a wing plate welded between the two side plates.

[0012] In the bucket arm of the utility model, the front hinge seat of the bucket arm oil cylinder of the bucket arm is arranged on the lower side of the two bucket arm webs.

[0013] The shovel arm is connected with the lifting link of the lifting link through the lifting link, and the lifting link is connected with the lifting link through the lifting link of the lifting link.

[0014] In the excavator of the present invention, the front pin of the bucket cylinder is arranged between the lower and upper pins of the rocker arm. With this structure, when the bucket arm is used on the excavator, the bucket arm cylinder that drives the bucket arm to swing is located on the lower side of the boom, which can be well protected.

[0015] In the excavator of the present invention, the front articulated seat of the boom cylinder on the boom is arranged on the lower side of the two boom webs, one end of the boom cylinder is rotatably connected to the front articulated seat of the boom cylinder, and the other end is rotatably connected to the rear articulated seat of the boom cylinder arranged on the lower side of the boom.

[0016] Compared with the prior art, in the utility model, a bucket cylinder installation space is provided between the two boom webs of the boom, and the space is used to install the bucket cylinder, so that in the excavator, the bucket cylinder is hidden in the boom, and in some work places with limited space, the bucket cylinder will not be hit and damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the bucket arm of the utility model.

[0018] Figure 2 It is a top view of the bucket arm of the utility model.

[0019] Figure 3 yes Figure 2 Cross-sectional view along the A axis.

[0020] Figure 4 It is a structural diagram of the bucket arm of the utility model.

[0021] Figure 5 It is a structural schematic diagram of the working device of the excavator of the present utility model.

[0022] Parts names and serial numbers in the figure:

[0023] Arm web 10 , attachment pivot hole 11 , rocker pivot hole 12 , bucket cylinder pivot hole 13 , boom pivot hole 14 , outer plate 15 , inner plate 16 , wing plate 17 , bucket cylinder installation space 18 .

[0024] Front articulated seat 20 of the boom cylinder.

[0025] Front connecting tube 31 and reinforcing rib 32.

[0026] Rear connecting tube 41.

[0027] Rear upper connecting plate 51 and rear lower connecting plate 52 .

[0028] Boom 60, arm cylinder 61, bucket cylinder 62, arm pivot pin 63, bucket cylinder rear end pin 64, arm cylinder front pin 65, rocker 66, push rod 67, rocker lower end pin 68, bucket cylinder front end pin 69, rocker upper end pin 70, attachment pivot second pin hole 71, and arm 72. DETAILED DESCRIPTION

[0029] The specific implementation scheme is described below with reference to the accompanying drawings.

[0030] In this embodiment, "front", "back", "up" and "down" are Figure 1 The status shown on the middle stick is a reference. Figure 1 The left and right and up and down directions on the middle paper correspond to the front and back and up and down directions of the stick respectively. Figure 2The up and down directions on the middle paper correspond to the left and right directions of the boom.

[0031] A bucket arm used for excavators. Figures 1 to 4 As shown, the boom comprises two parallel boom webs 10 spaced apart from each other. From front to back, the two boom webs 10 are provided with attachment pivot holes 11, rocker pivot holes 12, bucket cylinder pivot holes 13, and boom pivot holes 14. A bucket cylinder mounting space 18 is provided between the two boom webs 10 to accommodate and allow the bucket cylinder to swing. Web connectors are provided between the two boom webs 10, both in front of and behind the bucket cylinder mounting space 18. The left and right ends of the web connectors are welded to the two boom webs 10, respectively.

[0032] The web connectors include a front web connector and a rear web connector, which connect the two boom webs 10 at the front and rear of each boom web 10, respectively, to form a rigid body. The front and / or rear web connectors can be connecting tubes with left and right ends welded to the two boom webs. The connecting tubes are coaxially arranged with corresponding pivot holes 11 and boom pivot holes 14 on the two boom webs.

[0033] like Figure 2 Figure 3 As shown, the front web connector includes a front connecting tube 31 and a reinforcing rib 32. The front connecting tube 31 is coaxially arranged with the attachment pivot hole 11, and its ends are welded to the two boom webs 10. The reinforcing rib 32 is welded to both the front connecting tube 31 and the two boom webs 10 to strengthen the connection between the front connecting tube 31 and the boom webs 10. The front connecting tube 31 not only connects the two boom webs 10 but also serves as a pin sleeve for mounting the bushing of the first pivot pin (not shown) of the attachment.

[0034] The rear web connector includes a rear connecting tube 41, which is coaxially arranged with the boom pivot hole 14 and welded to the two boom webs 10 at both ends. The rear connecting tube 41 not only connects the two boom webs 10 but also acts as a pin sleeve for mounting the bushing of the boom pivot pin 63.

[0035] In other embodiments, the front and rear web connectors may also adopt other structural forms. For example, the web connectors may be composed of a single annular bent plate or a plurality of bent plates spliced ​​end to end to form an annular bent plate. The axial ends of the annular bent plate are welded to the two boom webs 10 and surround the attachment pivot holes 11 and the corresponding pivot holes in the boom pivot holes 14. The annular bent plate and the two boom webs form a box-shaped structure at the front or rear of the boom webs to strengthen the connection strength between the two boom webs.

[0036] Optionally, a rear upper connecting plate 51 is provided between the two boom webs 10 , or a rear lower connecting plate 52 is provided, or both the rear upper connecting plate 51 and the rear lower connecting plate 52 are provided.

[0037] like Figure 3 As shown, the rear upper connecting plate 51 is located above the bucket cylinder pivot hole 13 and its left and right ends are correspondingly welded to the two dipper arm webs 10. Its rear end extends above the boom pivot hole 14, and its front end extends to the front and upper part of the bucket cylinder pivot hole 13. The rear lower connecting plate 52 is located below the bucket cylinder pivot hole 13 and its left and right ends are correspondingly welded to the two dipper arm webs 10. Its rear end extends below the boom pivot hole 14, and its front end extends to the front and lower part of the bucket cylinder pivot hole 13.

[0038] Alternatively, as Figure 2 As shown, the boom web 10 is a flat box-shaped structure, which is welded by an inner plate 16, an outer plate 15 and a wing plate 17. The boom web of the box-shaped structure can reduce the amount of material while meeting the strength requirements.

[0039] Optionally, the arm cylinder's front articulated base 20 is positioned below the two arm webs 10. This base 20 connects to the arm cylinder 61. Positioned below the two arm webs 10 and welded thereto, the base 20 connects the two arm webs 10, thereby enhancing the overall strength of the arm. Positioning the front articulated base 20 below the arm webs 10 and positioning the arm cylinder 61 below the arm 72 and boom 60 effectively protects the arm from damage during excavator operation.

[0040] This embodiment further provides an excavator, the working device of which includes the aforementioned boom 72 .

[0041] like Figure 5 As shown, the working device of the excavator includes attachments, a bucket arm 72, a boom 60, a boom cylinder, a bucket arm cylinder 61, a bucket cylinder 62, a rocker assembly, etc.

[0042] The rear end of the boom 60 is pivotally connected to a slewing platform (not shown) via a pin. The ends of the boom cylinder are rotatably connected to the boom 60 and the slewing platform via corresponding pins. The arm 72 is rotatably connected to the front end of the boom 60 via a boom pivot pin 63 located in the boom pivot hole 14. An attachment (not shown) is rotatably connected to the front end of the arm 72 via a first attachment pivot pin (not shown) located in the attachment pivot hole 11. The attachment can be a bucket or other work implement, such as a clamp or a breaker hammer.

[0043] The rocker assembly includes a rocker 66 and a push rod 67. The lower end of the rocker 66 is positioned between the two bucket arm webs 10 and is pivotally connected to the bucket arm 72 via a lower rocker pin 68 located in the rocker pivot hole 12. The upper end of the rocker 66 is pivotally connected to the rear end of the push rod 67 via an upper rocker pin 70. A second attachment pivot pin hole 71 is provided at the front end of the push rod 67 for mounting a second attachment pivot pin (not shown). The push rod 67 is pivotally connected to the attachment via the second attachment pivot pin. When the bucket cylinder 62 extends or retracts, the rocker assembly propels the attachment to swing about the first attachment pivot pin at the front end of the bucket arm.

[0044] The bucket cylinder 62 is arranged in the bucket cylinder installation space 18 on the webs of the two bucket arms. Its rear end is rotatably connected to the bucket arm 72 via the bucket cylinder rear end pin 64 arranged in the bucket cylinder pivot hole 13, and its front end is rotatably connected to the rocker arm 66 via the bucket cylinder front end pin 69. The bucket cylinder front end pin 69 can be the same pin as the rocker arm upper end pin 70, that is, the bucket cylinder 62 and the push rod 67 are both connected to the rocker arm via the rocker arm upper end pin 70. Figure 5 In the illustrated excavator working device, the bucket cylinder front pin 69 is positioned between the rocker arm lower pin 68 and the rocker arm upper pin 70. This structure further lowers the front end of the bucket cylinder 62, providing better protection and making it less susceptible to collisions during excavator operation.

[0045] The front end of the arm cylinder 62 is rotatably connected to the front arm cylinder articulation seat 20 on the lower side of the arm 72 via the front arm cylinder pin 65, and the rear end is rotatably connected to the rear arm cylinder articulation seat provided on the lower side of the boom 60. By positioning the front arm cylinder articulation seat 20 below the arm 72, the overall length of the arm 62 is shortened while maintaining the same arm rotation radius, thereby reducing the height required for operation.

[0046] In this embodiment, the bucket cylinder 62 is basically located inside the boom 72. Since the boom cylinder 72 is on the lower side of the boom, when the excavator operates in a confined space and the boom is raised, the boom cylinder 61 and the bucket cylinder 62 will not collide with obstacles above, thereby avoiding damage to the cylinders due to collision.

Claims

1. A bucket arm for an excavator, characterized in that: The boom includes two parallel boom webs that are spaced apart from each other on the left and right sides. The two boom webs are provided with accessory pivot holes, rocker pivot holes, bucket cylinder pivot holes and boom pivot holes in sequence from the front to the rear. There is a bucket cylinder installation space between the two boom webs for accommodating the bucket cylinder and allowing it to swing. Web connecting parts are provided between the two boom webs and in front and rear of the bucket cylinder installation space. The left and right ends of the web connecting parts are welded to the two boom webs respectively.

2. The arm according to claim 1, wherein: The web connecting parts at the front and / or rear include connecting tubes welded to the two boom webs at left and right ends, and the connecting tubes are coaxially arranged with the corresponding pivot holes in the attachment pivot holes and the boom pivot holes on the two boom webs.

3. The arm according to claim 2, characterized in that: The front and / or rear web connectors also include reinforcing ribs that are welded to the corresponding connecting tubes and the two boom webs.

4. The arm according to claim 1, wherein: The web connecting parts at the front and / or rear are composed of annular bent plates, the axial ends of which are correspondingly welded to the two boom webs and surround the corresponding pivot holes in the attachment pivot hole and the boom pivot hole.

5. The arm according to any one of claims 1 to 4, characterized in that: A rear upper connecting plate and / or a rear lower connecting plate are provided between the two boom webs; The rear upper connecting plate is located above the bucket cylinder pivot hole and its left and right ends are correspondingly welded to the two bucket arm webs, its rear end extends to the top of the boom pivot hole, and its front end extends to the front and top of the bucket cylinder pivot hole; The rear lower connecting plate is located below the bucket cylinder pivot hole and its left and right ends are welded to the two boom webs respectively. Its rear end extends to the bottom of the boom pivot hole, and its front end extends to the front and bottom of the bucket cylinder pivot hole.

6. The arm according to any one of claims 1 to 4, characterized in that: Each boom web is a flat box-shaped structure consisting of two left and right side plates that are arranged in parallel and spaced apart, and a wing plate welded between the two side plates.

7. The arm according to claim 6, characterized in that: The front hinged seat of the bucket rod oil cylinder of the bucket rod is arranged on the lower side of the two bucket rod webs.

8. An excavator, wherein the working device comprises an attachment, a boom, a bucket cylinder, and a rocker assembly including a rocker and a push rod, characterized in that: The working device also includes a boom as described in any one of claims 1 to 6; the attachment is rotatably connected to the boom through a first attachment pivot pin arranged in the attachment pivot hole, and the boom is rotatably connected to the front end of the boom through a boom pivot pin arranged in the boom pivot hole, the lower end of the rocker arm is arranged between the two boom webs and is rotatably connected to the boom through a lower end rocker pin arranged in the rocker pivot hole, the upper end of the rocker arm is rotatably connected to the rear end of the push rod through an upper end rocker pin, and the front end of the push rod is rotatably connected to the attachment through a second attachment pivot pin; the bucket cylinder is arranged in the bucket cylinder installation space and the rear end is rotatably connected to the boom through a rear end pin of the bucket cylinder arranged in the bucket cylinder pivot hole, and the front end is rotatably connected to the rocker arm through a front end pin of the bucket cylinder.

9. The excavator according to claim 8, characterized in that The front end pin of the bucket cylinder is arranged at a position between the upper end pin arrangement position of the rocker arm and the lower end pin arrangement position of the rocker arm.

10. The excavator according to claim 8 or 9, characterized in that: The front hinge seat of the boom cylinder on the boom is arranged on the lower side of the two boom webs, one end of the boom cylinder is rotatably connected to the front hinge seat of the boom cylinder, and the other end is rotatably connected to the rear hinge seat of the boom cylinder arranged on the lower side of the boom.

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