A bulldozer blade edge protection device

Abstract

The application discloses a bulldozer blade and cutter plate edge protection device, which comprises an edge protection mechanism between a bulldozer blade and a cutter plate, and a connecting beam is symmetrically and fixedly connected to the outer side of the bulldozer blade, and a lifting hydraulic oil cylinder is hingedly connected to the outer side of the connecting beam, the cutter plate is arranged at the bottom of the bulldozer blade, the edge protection mechanism comprises two rotating shafts, connecting rods are fixedly connected to the outer sides of the two rotating shafts, an arc-shaped outer protection bushing is fixedly connected between the two connecting rods, an arc-shaped inner protection bushing is slidably connected in the arc-shaped outer protection bushing, and a connecting mechanism is arranged on the outer sides of the two rotating shafts. By operating a control rod in a cab of the bulldozer, the arc-shaped outer protection bushing and the arc-shaped inner protection bushing can be rotated to the bottom of the cutter plate or the outer side of the bulldozer blade, the arc-shaped outer protection bushing and the arc-shaped inner protection bushing at the bottom of the cutter plate can replace the cutter plate to contact the ground, and the cutter plate is protected without manual dismounting of the protection mechanism.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of blade edge protection of a blade plate, and particularly relates to a blade edge protection device for a bulldozer blade. BACKGROUND

[0002] The bulldozer blade is a commonly used device for earthmoving of engineering machinery, and excavators are often configured as a standard. The maximum width of the bulldozer blade is generally the same as the width of the chassis of the whole machine. The bulldozer blade can play a role of removing obstacles in front, cleaning the road surface or fixing the machine body under certain working conditions. When the bulldozer blade supports the ground, the blade edge of the bulldozer blade directly contacts and extrudes the ground, which can easily damage the blade edge and the ground. In order to avoid unnecessary damage caused by direct contact and extrusion of the blade edge and the ground, a protective sleeve is usually arranged outside the blade edge.

[0003] According to the search, the utility model patent with the Chinese patent number CN 209179093 U discloses a blade edge protection device for a bulldozer of an excavator. The device includes a bulldozer, a blade plate at the lower part of the bulldozer, and a plurality of blade edge protection sleeves made of wear-resistant rubber. Each blade edge protection sleeve is installed on the blade plate of the bulldozer in a detachable manner along the length direction of the blade plate. A blade edge accommodating groove is arranged on the blade edge protection sleeve, and the blade edge of the bulldozer is located in the blade edge accommodating groove. Compared with the prior art, the blade edge protection device of the utility model patent with the Chinese patent number CN 209179093 U can avoid damage to the ground caused by direct contact of the blade edge of the bulldozer with the ground when the bulldozer is used as a support.

[0004] However, the blade edge protection device for the bulldozer of the excavator needs to be installed on the outside of the blade edge of the blade plate by bolts, which requires manual disassembly when the blade edge protection sleeve is disassembled. Manual disassembly is inconvenient, and therefore, a blade edge protection device for a bulldozer is needed, which can protect the blade edge of the blade plate and does not need manual disassembly. SUMMARY

[0005] The present application aims to solve the problem of the prior art that manual disassembly is inconvenient, and provides a blade edge protection device for a bulldozer.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] The utility model provides a bulldozing blade cutter plate cutting edge protection device, including cutting edge protection mechanism between bulldozing blade and cutter plate, the outside symmetry fixed connection of bulldozing blade has connecting beam, the outside hinged of connecting beam has lifting hydraulic oil cylinder, the bottom of cutter plate is set in the bulldozing blade, cutting edge protection mechanism includes two rotating shafts that rotate respectively and connect in the both sides of bulldozing blade, the outside fixed connection of two rotating shafts has connecting rod, and the fixed connection of arc protection outer bushing between two connecting rods, the inside sliding connection of arc protection outer bushing has arc protection inner lining, and the fixed connection of arc reset spring between arc protection outer bushing and arc protection inner lining, the outside of two rotating shafts has the connecting mechanism with connecting beam, and the connecting mechanism includes the fixed connection of two cranks in the both ends of two rotating shafts, and the fixed connection of connecting shaft A in the away from two cranks of two cranks, the outside rotating connection of two connecting shaft A has connecting rod, and the fixed connection of connecting shaft B in the away from two cranks of two connecting rod, and the connecting mechanism further includes the fixed connection of connecting frame in the bottom of connecting beam, and the outside installation of two horizontal hydraulic oil cylinders of connecting frame, and the output of two horizontal hydraulic oil cylinders respectively rotating connection in the outside of two connecting shaft B,

[0008] When two horizontal hydraulic oil cylinders are synchronous elongation, can make arc protection outer bushing and arc protection inner lining rotate to the bottom of cutter plate, and arc protection outer bushing and arc protection inner lining at the bottom of cutter plate can replace cutter plate and ground contact, when two horizontal hydraulic oil cylinders are synchronous shortening, can make arc protection outer bushing and arc protection inner lining rotate to the outside of bulldozing blade.

[0009] The above technical scheme further comprises:

[0010] The end away from the bulldozing blade of the connecting beam is hinged to the front end of the bulldozing blade, the end away from the connecting beam of the lifting hydraulic oil cylinder is hinged to the front end of the bulldozing blade, and the cutter plate is installed on the bottom of the bulldozing blade through bolts; the lifting hydraulic oil cylinder can be started through the operating lever inside the bulldozer cab, the connecting beam drives the bulldozing blade to move downward when the lifting hydraulic oil cylinder is elongated, the connecting beam drives the bulldozing blade to move upward when the lifting hydraulic oil cylinder is shortened, and the cutting edge protection mechanism moves synchronously with the bulldozing blade and the connecting beam.

[0011] The arc protection outer bushing and the arc protection inner lining are made of corrosion-resistant stainless steel, and the end of the arc protection inner lining close to the arc protection outer bushing is always inside the arc protection outer bushing; the arc protection outer bushing and the arc protection inner lining can be located at the bottom of the cutter plate and replace the cutter plate to contact the ground.

[0012] The inner side of the arc-shaped protective inner lining plate is provided with a connecting piece, the connecting piece comprises an arc-shaped groove opened in the bottom side of the arc-shaped protective inner lining plate, an arc-shaped connecting lining plate is slidably connected in the arc-shaped groove, and a plurality of buffer elastic columns are fixedly connected between the arc-shaped groove and the arc-shaped connecting lining plate; the arc-shaped connecting lining plate is made of anticorrosive stainless steel, and the elastic force of the buffer elastic column satisfies that when the arc-shaped connecting lining plate is in contact with the ground, the buffer elastic column can buffer the extrusion force of the ground on the arc-shaped protective inner lining plate, and when there is no external force, the arc-shaped connecting lining plate can be driven to return to a state that the outer edge of the arc-shaped connecting lining plate is located on the same circumferential line as the outer edge of the protective outer lining sleeve.

[0013] An inclined notch is formed in one side of the arc-shaped connecting lining plate close to the port of the arc-shaped protective outer lining sleeve, and the side of the arc-shaped connecting lining plate close to the arc-shaped groove is always in the interior of the arc-shaped groove; the inclined notch can assist the arc-shaped connecting lining plate to completely enter the interior of the arc-shaped groove, thereby assisting the arc-shaped protective inner lining plate to enter the interior of the arc-shaped protective outer lining sleeve.

[0014] The present application has the following beneficial effects:

[0015] 1、The two horizontal hydraulic cylinders are synchronously elongated by operating the joystick in the bulldozer cab, so that the arc-shaped protective outer lining sleeve and the arc-shaped protective inner lining plate are rotated to the bottom of the blade plate, and the arc-shaped protective outer lining sleeve and the arc-shaped protective inner lining plate at the bottom of the blade plate can replace the blade plate to contact the ground, and the two horizontal hydraulic cylinders are synchronously shortened by operating the joystick in the bulldozer cab, so that the arc-shaped protective outer lining sleeve and the arc-shaped protective inner lining plate are rotated to the outside of the bulldozer blade, that is, the blade plate is protected without manual disassembly of the protection mechanism.

[0016] 2、In the present application, when the connecting beam is in a horizontal state or a left lower inclined state, the arc-shaped protective outer lining sleeve at the bottom of the blade plate can replace the blade plate to contact the ground to achieve the protection effect, when the connecting beam is in a left upper inclined state, the arc-shaped connecting lining plate on the arc-shaped protective inner lining plate at the bottom of the blade plate can replace the blade plate to contact the ground to achieve the protection effect, and the buffer elastic column between the arc-shaped connecting lining plate and the arc-shaped protective inner lining plate can reduce the contact extrusion force of the ground on the device, thereby improving the service life of the device. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a first structural schematic view of a bulldozer blade blade edge protection device proposed in the present application;

[0018] Figure 2 It is a second structural schematic view of a bulldozer blade blade edge protection device proposed in the present application;

[0019] Figure 3For Figure 2 Structure enlarged schematic view at A in the middle;

[0020] Figure 4 Third structure schematic view of a blade edge protection device for a bulldozer blade;

[0021] Figure 5 Fourth structure schematic view of a blade edge protection device for a bulldozer blade;

[0022] Figure 6 Partial structure schematic view of a blade edge protection device for a bulldozer blade.

[0023] In the figure: 1, bulldozer blade; 2, blade; 3, edge protection mechanism; 31, rotating shaft; 32, connecting rod; 33, arc-shaped protective outer bushing; 34, arc-shaped protective inner lining plate; 35, arc-shaped reset spring; 4, connecting beam; 5, lifting hydraulic cylinder; 6, connecting mechanism; 61, crank; 62, connecting shaft A; 63, connecting rod; 64, connecting shaft B; 65, connecting frame; 66, horizontal hydraulic cylinder; 7, connecting piece; 71, arc-shaped groove; 72, arc-shaped connecting lining plate; 73, buffer spring; 74, oblique notch. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application. EMBODIMENT

[0025] As Figures 1-5 shown, the blade edge protection device for a bulldozer blade provided by the present application comprises an edge protection mechanism 3 between a bulldozer blade 1 and a blade 2, the outer side of the bulldozer blade 1 is symmetrically fixedly connected with a connecting beam 4, the outer side of the connecting beam 4 is hingedly connected with a lifting hydraulic cylinder 5, the end of the connecting beam 4 away from the bulldozer blade 1 is hingedly connected to the front end of the body of the bulldozer, the end of the lifting hydraulic cylinder 5 away from the connecting beam 4 is hingedly connected to the front end of the body of the bulldozer, the blade 2 is arranged at the bottom of the bulldozer blade 1, the blade 2 is installed at the bottom of the bulldozer blade 1 through bolts, the lifting hydraulic cylinder 2 can be started through a control lever inside the cab of the bulldozer, when the lifting hydraulic cylinder 2 is elongated, the connecting beam 4 will drive the bulldozer blade 1 to move downward, when the lifting hydraulic cylinder 2 is shortened, the connecting beam 4 will drive the bulldozer blade 1 to move upward, the edge protection mechanism 3 moves synchronously with the bulldozer blade 1 and the connecting beam 4;

[0026] The blade protection mechanism 3 comprises two rotating shafts 31 rotatingly connected on both sides of the bulldozing blade 1 respectively, the outer portions of the two rotating shafts 31 are fixedly connected with connecting rods 32, the connecting rods 32 are fixedly connected with an arc-shaped protection outer sleeve 33 between the two connecting rods 32, the arc-shaped protection outer sleeve 33 is slidingly connected with an arc-shaped protection inner lining plate 34 inside, the arc-shaped protection outer sleeve 33 and the arc-shaped protection inner lining plate 34 are made of corrosion-resistant stainless steel, the end of the arc-shaped protection inner lining plate 34 close to the arc-shaped protection outer sleeve 33 is always inside the arc-shaped protection outer sleeve 33, the arc-shaped protection outer sleeve 33 and the arc-shaped protection inner lining plate 34 can be located at the bottom of the blade plate 2 and replace the blade plate 2 to contact the ground, the arc-shaped protection outer sleeve 33 and the arc-shaped protection inner lining plate 34 are fixedly connected with an arc-shaped reset spring 35 between the arc-shaped protection outer sleeve 33 and the arc-shaped protection inner lining plate 34;

[0027] The outer portions of the two rotating shafts 31 are connected with the connecting mechanism 6 connected with the connecting beam 4, the connecting mechanism 6 comprises two cranks 61 fixedly connected at the ends of the two rotating shafts 31, the two cranks 61 are inclined downward in the initial position state, the ends of the two cranks 61 away from the two rotating shafts 31 are fixedly connected with connecting shafts A 62, the outer portions of the two connecting shafts A 62 are rotatingly connected with connecting rods 63, the two connecting rods 63 are inclined upward in the initial position state, the ends of the two connecting rods 63 away from the two cranks 61 are fixedly connected with connecting shafts B 64, the connecting mechanism 6 further comprises a connecting frame 65 fixedly connected at the bottom of the connecting beam 4, the outer portion of the connecting frame 65 is installed with two horizontal hydraulic oil cylinders 66, the output ends of the two horizontal hydraulic oil cylinders 66 are rotatingly connected with the outer portions of the two connecting shafts B 64 respectively, the two horizontal hydraulic oil cylinders 66 are in the shortest contraction state in the initial position state.

[0028] In the embodiment: when the bulldozing blade 1 needs to fix the machine body to support the ground (for example, the position state of each component in the bulldozer is taken as an example), Figure 4 by operating the operating rod inside the bulldozer cab to start the two horizontal hydraulic oil cylinders 66, the two horizontal hydraulic oil cylinders 66 are synchronously elongated, the synchronous elongation of the two horizontal hydraulic oil cylinders 66 will drive the two connecting rods 63 to drive the two cranks 61 to rotate left respectively, the two cranks 61 rotating left will drive the two connecting rods 32 to rotate left respectively through the two rotating shafts 31, the two connecting rods 32 rotating left drive the arc-shaped protection outer sleeve 33 to rotate left, in the process of the arc-shaped protection outer sleeve 33 rotating left, the arc-shaped reset spring 35 compressed inside will assist the arc-shaped protection inner lining plate 34 to gradually extend out;

[0029] when the two horizontal hydraulic oil cylinders 66 are synchronously elongated to the longest elongation state, the two connecting rods 32 are just rotated to the vertical state, at this time, the arc-shaped protection outer sleeve 33 and the arc-shaped protection inner lining plate 34 are located at the bottom of the blade plate 2, and the arc-shaped protection outer sleeve 33 and the arc-shaped protection inner lining plate 34 located at the bottom of the blade plate 2 can replace the blade plate 2 to contact the ground;

[0030] When the bulldozer blade 1 needs to be used, the two horizontal hydraulic cylinders 66 are started by operating the joystick inside the bulldozer cab to synchronously shorten and reset, which drives the arc-shaped protective outer bushing 33 to rotate right and reset through the two connecting rods 63, the two cranks 61, the two rotating shafts 31 and the two connecting rods 32. In the process of rotating right and resetting of the arc-shaped protective outer bushing 33, the arc-shaped protective inner lining plate 34 is gradually pressed into the inside of the arc-shaped protective outer bushing 33 and compresses the arc-shaped reset spring 35 under the extrusion of the outside of the bulldozer blade 1.

[0031] The bulldozer blade blade edge protection device can rotate the arc-shaped protective outer bushing 33 and the arc-shaped protective inner lining plate 34 to the bottom of the blade plate 2 by synchronously extending the two horizontal hydraulic cylinders 66 through the joystick inside the bulldozer cab, so that the arc-shaped protective outer bushing 33 and the arc-shaped protective inner lining plate 34 at the bottom of the blade plate 2 can replace the blade plate 2 to contact the ground. The arc-shaped protective outer bushing 33 and the arc-shaped protective inner lining plate 34 can rotate to the outside of the bulldozer blade 1 by synchronously shortening the two horizontal hydraulic cylinders 66 through the joystick inside the bulldozer cab, that is, the blade plate 2 is protected without manual disassembly of the protection mechanism. Embodiment

[0032] As shown in Figures 1-6 Based on the first embodiment, the inside of the arc-shaped protective inner lining plate 34 is provided with a connecting piece 7, which includes an arc-shaped groove 71 opened at the bottom side of the arc-shaped protective inner lining plate 34. An arc-shaped connecting lining plate 72 is slidably connected inside the arc-shaped groove 71. The arc-shaped connecting lining plate 72 is made of corrosion-resistant stainless steel. The side of the arc-shaped connecting lining plate 72 close to the arc-shaped groove 71 is always inside the arc-shaped groove 71. A plurality of buffer spring columns 73 are fixedly connected between the arc-shaped groove 71 and the arc-shaped connecting lining plate 72. The buffer spring columns 73 have a large elastic force. When the buffer spring columns 73 return to the original length, the outer edge of the arc-shaped connecting lining plate 72 and the outer edge of the arc-shaped protective outer bushing 33 are on the same circumferential line.

[0033] The side of the arc-shaped connecting lining plate 72 close to the port of the arc-shaped protective outer bushing 33 is provided with an inclined notch 74. The inclined notch 74 can assist the arc-shaped connecting lining plate 72 to completely enter the inside of the arc-shaped groove 71, thereby assisting the arc-shaped protective inner lining plate 34 to enter the inside of the arc-shaped protective outer bushing 33.

[0034] In this embodiment: when the arc-shaped protective inner lining plate 34 is fully extended, the compressed buffer spring 73 inside the arc-shaped slot 71 will drive the arc-shaped connecting lining plate 72 to extend to the same circumferential line as the outer edge of the arc-shaped protective outer lining sleeve 33, when the arc-shaped protective inner lining plate 34 is gradually pressed into the arc-shaped protective outer lining sleeve 33 by the extrusion of the outside of the bulldozer blade 1, the port of the arc-shaped protective outer lining sleeve 33 will extrude the inclined notch 74 on the arc-shaped connecting lining plate 72, so that the arc-shaped connecting lining plate 72 enters the inside of the arc-shaped slot 71, so that the arc-shaped protective inner lining plate 34 enters the inside of the arc-shaped protective outer lining sleeve 33;

[0035] When the connecting beam 4 is in a horizontal state or a left-down inclined state, the arc-shaped protective outer lining sleeve 33 at the bottom of the blade plate 2 will replace the blade plate 2 to contact the ground to achieve the effect of protection, when the connecting beam 4 is in a left-up inclined state, the arc-shaped connecting lining plate 72 on the arc-shaped protective inner lining plate 34 at the bottom of the blade plate 2 will replace the blade plate 2 to contact the ground to achieve the effect of protection, and the buffer spring 73 between the arc-shaped connecting lining plate 72 and the arc-shaped protective inner lining plate 34 can reduce the contact extrusion force of the ground on the mechanism, thereby improving the service life of the device.

[0036] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.

Claims

1. A cutting edge protection device for a bulldozer blade, comprising a cutting edge protection mechanism (3) located between a bulldozer blade (1) and a blade (2), wherein a connecting beam (4) is symmetrically fixedly connected to the outer side of the bulldozer blade (1), and a lifting hydraulic cylinder (5) is hinged to the outer side of the connecting beam (4), and the blade (2) is disposed at the bottom of the bulldozer blade (1), characterized in that: The blade protection mechanism (3) comprises two rotating shafts (31) rotatingly connected on both sides of the bulldozing shovel (1), the outer part of each of the two rotating shafts (31) is fixedly connected with a connecting rod (32), the two connecting rods (32) are fixedly connected with an arc-shaped protective outer bushing (33) between them, the arc-shaped protective outer bushing (33) is slidingly connected with an arc-shaped protective inner lining plate (34) inside, the arc-shaped protective outer bushing (33) and the arc-shaped protective inner lining plate (34) are fixedly connected with an arc-shaped reset spring (35) between them, the outer part of each of the two rotating shafts (31) is connected with a connecting mechanism (6) connected with the connecting beam (4), the connecting mechanism (6) comprises two cranks (61) fixedly connected at the ends of the two rotating shafts (31), the end, away from the two rotating shafts (31), of each of the two cranks (61) is fixedly connected with a connecting shaft A (62), the outer part of each of the two connecting shafts A (62) is rotatingly connected with a connecting rod (63), the end, away from the two cranks (61), of each of the two connecting rods (63) is fixedly connected with a connecting shaft B (64), the connecting mechanism (6) further comprises a connecting frame (65) fixedly connected at the bottom of the connecting beam (4), the outer part of the connecting frame (65) is provided with two horizontal hydraulic oil cylinders (66), the output ends of the two horizontal hydraulic oil cylinders (66) are rotatingly connected with the outer parts of the two connecting shafts B (64) respectively. When the two horizontal hydraulic oil cylinders (66) are synchronously elongated, the arc-shaped protective outer bushing (33) and the arc-shaped protective inner lining plate (34) can be rotated to the bottom of the blade plate (2), and the arc-shaped protective outer bushing (33) and the arc-shaped protective inner lining plate (34) at the bottom of the blade plate (2) can replace the blade plate (2) to contact the ground, and when the two horizontal hydraulic oil cylinders (66) are synchronously shortened, the arc-shaped protective outer bushing (33) and the arc-shaped protective inner lining plate (34) can be rotated to the outer side of the bulldozing shovel (1).

2. A blade edge protection device for a bulldozer blade as defined in claim 1, wherein: The end, away from the bulldozing shovel (1), of the connecting beam (4) is hingedly connected to the front end of the body of the bulldozer, the end, away from the connecting beam (4), of the lifting hydraulic oil cylinder (5) is hingedly connected to the front end of the body of the bulldozer, and the blade plate (2) is bolted on the bottom of the bulldozing shovel (1).

3. A blade edge protection device for a bulldozer blade as defined in claim 1, wherein: The arc-shaped protective outer bushing (33) and the arc-shaped protective inner lining plate (34) are both made of corrosion-resistant stainless steel, and the end, close to the arc-shaped protective outer bushing (33), of the arc-shaped protective inner lining plate (34) is always inside the arc-shaped protective outer bushing (33).

4. A blade edge protection device for a bulldozer blade as defined in claim 1, wherein: The inner side of the arc-shaped protective inner lining plate (34) is provided with a connecting piece (7), the connecting piece (7) comprises an arc-shaped groove (71) opened at the bottom side of the arc-shaped protective inner lining plate (34), the inner part of the arc-shaped groove (71) is slidingly connected with an arc-shaped connecting lining plate (72), and a plurality of buffer elastic columns (73) are fixedly connected between the arc-shaped groove (71) and the arc-shaped connecting lining plate (72).

5. A blade edge protection device for a bulldozer blade as defined in claim 4, wherein: The arc-shaped connecting lining plate (72) is made of corrosion-resistant stainless steel, and the elastic force of the buffer elastic column (73) satisfies: when the arc-shaped connecting lining plate (72) is in contact with the ground, the buffer elastic column (73) can buffer the extrusion force of the ground on the arc-shaped protective inner lining plate (34), and when there is no external force, the arc-shaped connecting lining plate (72) can be driven to restore to a state that the outer edge of the arc-shaped connecting lining plate (72) is located on the same circumferential line as the outer edge of the arc-shaped protective outer lining sleeve (33).

6. A blade edge protection device for a bulldozer blade as defined in claim 4, wherein: The arc-shaped connecting lining plate (72) is provided with an inclined gap (74) on one side close to the port of the arc-shaped protective outer lining sleeve (33), and one side of the arc-shaped connecting lining plate (72) close to the arc-shaped groove (71) is always inside the arc-shaped groove (71).

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