Excavator accessory quick-change structure

Abstract

The utility model discloses a quick-change structure for accessories of an excavator. The quick-change structure comprises a quick-change oil cylinder, a first quick-change shaft assembly and a second quick-change shaft assembly, one end of the quick-change oil cylinder is rotationally connected with the bucket rod through a first quick-change shaft assembly; the other end of the quick-change oil cylinder is rotationally connected with the two connecting rods through a second quick-change shaft assembly; the two connecting rods, the two rockers and the accessory oil cylinder are rotationally connected through a first rotating shaft; the two rockers are rotationally connected with the bucket rod through a second rotating shaft; two lug plates are arranged on the accessory in parallel at an interval; an upper half hole and a lower half hole are formed in each of the two lug plates; the first quick-change shaft assembly is matched with the lower half hole, and the second quick-change shaft assembly is matched with the upper half hole to be connected with the accessory and the bucket rod. And the replacement efficiency and the construction safety of the accessory are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of excavators, and particularly relates to a quick-change structure for excavator attachments. Background Art

[0002] As an important member of construction machinery, excavators are widely used in various construction scenarios by replacing attachments. In order to enable excavators to quickly replace attachments, the traditional method is to add a quick-change device between the front end of the excavator's dipper arm and the attachment.

[0003] However, in the prior art, the quick-change device has a high cost, which increases the customer's purchase cost; at the same time, the structure of the quick-change device is complex and prone to cracking, posing a potential safety hazard during operation. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a quick-change structure for excavator attachments, so as to improve the replacement efficiency of the attachments and the construction safety.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A quick-change structure for excavator attachments includes a quick-change oil cylinder, a first quick-change shaft assembly, and a second quick-change shaft assembly; one end of the quick-change oil cylinder is rotatably connected to the dipper arm through the first quick-change shaft assembly; the other end of the quick-change oil cylinder is rotatably connected to two connecting rods through the second quick-change shaft assembly; the two connecting rods, two rockers, and the attachment oil cylinder are rotatably connected through a first rotating shaft; the two rockers are rotatably connected to the dipper arm through a second rotating shaft;

[0007] Two ear plates are arranged on the attachment in parallel at intervals; upper half holes and lower half holes are arranged on both ear plates; the first quick-change shaft assembly is in fit connection with the lower half holes, and the second quick-change shaft assembly is in fit connection with the upper half holes to connect the attachment and the dipper arm.

[0008] Further, limiting grooves are arranged on the two ear plates; the upper half holes and the lower half holes are respectively arranged on both sides of the limiting grooves, and the openings of the upper half holes and the lower half holes on the same ear plate are oppositely arranged.

[0009] Further, the first quick-change shaft assembly and the second quick-change shaft assembly include a mounting shaft, and wear-resistant sleeves are arranged at both ends of the mounting shaft; the wear-resistant sleeves at both ends of the mounting shaft in the first quick-change shaft assembly are in fit installation with the lower half holes of the two ear plates on the attachment, and the wear-resistant sleeves at both ends of the mounting shaft in the second quick-change shaft assembly are in fit installation with the upper half holes of the two ear plates on the attachment.

[0010] Further, a bushing is arranged between the mounting shaft and the wear-resistant sleeve.

[0011] Further, a stop sleeve for fixing the wear-resistant sleeve is arranged on the mounting shaft. The stop sleeve is mounted on the mounting shaft by bolts or positioning pins. One end of the wear-resistant sleeve abuts against the shaft shoulder of the mounting shaft, and the other end of the wear-resistant sleeve abuts against the stop sleeve.

[0012] Further, a plurality of adjusting washers are arranged between the wear-resistant sleeve and the shaft shoulder of the mounting shaft; the adjusting washers are sleeved on the mounting shaft.

[0013] Further, the quick-change oil cylinder includes an oil cylinder barrel and a piston rod; a first mounting ring is arranged on the oil cylinder barrel, and the first mounting ring is connected with the first quick-change shaft assembly; the piston rod is provided with a second mounting ring, and the second mounting ring is connected with the second quick-change shaft assembly.

[0014] Compared with the prior art, the beneficial effects achieved by the utility model are as follows:

[0015] In the utility model, one end of the quick-change oil cylinder is rotationally connected with the bucket rod through the first quick-change shaft assembly; the other end of the quick-change oil cylinder is rotationally connected with two connecting rods through the second quick-change shaft assembly; two ear plates are arranged on the implement in parallel at intervals; upper half holes and lower half holes are arranged on both ear plates; the first quick-change shaft assembly is in fit connection with the lower half holes, and the second quick-change shaft assembly is in fit connection with the upper half holes to connect the implement and the bucket rod; the quick-change device is cancelled, the problem of cracking of the quick-change device is avoided, and the quick replacement of the implement can be completed by controlling the telescopic movement of the quick-change oil cylinder without hoisting the quick-change device, thereby improving the replacement efficiency of the implement and the construction safety. Description of the Drawings

[0016] Figure 1 is a structural diagram of the quick-change structure of the excavator implement provided in this embodiment;

[0017] Figure 2 is a structural diagram of the quick-change oil cylinder provided in this embodiment;

[0018] Figure 3 is an exploded view of the first quick-change shaft assembly and the second quick-change shaft assembly provided in this embodiment;

[0019] Figure 4 is an axonometric view of the first quick-change shaft assembly and the second quick-change shaft assembly provided in this embodiment.

[0020] In the figure, 1 is the arm, 2 is the bucket cylinder, 3 is the connecting rod, 4 is the rocker, 5 is the quick-change cylinder, 5-1 is the cylinder barrel, 5-11 is the first mounting ring, 5-2 is the piston rod, 5-21 is the second mounting ring, 6 is the second rotating shaft, 7 is the first rotating shaft, 8A is the first quick-change shaft assembly, 8B is the second quick-change shaft assembly, 8-1 is the mounting shaft, 8-2 is the adjusting washer, 8-3 is the wear-resistant sleeve, 8-4 is the bushing, 8-5 is the stop sleeve, 8-6 is the bolt, 8-7 is the nut, 9 is the bucket, 9-1 is the ear plate, 9-2 is the limit groove, 9-3 is the upper half hole, 9-4 is the upper half hole. Specific embodiments

[0021] The present utility model will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present utility model and should not be used to limit the protection scope of the present utility model.

[0022] It should be noted that in the description of the present utility model, the orientation or positional relationship indicated by the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model rather than requiring the present utility model to be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present utility model. The terms "front", "rear", "left", "right", "upper", "lower" used in the description of the present utility model refer to the directions in the accompanying drawings, and the terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component. Embodiment

[0023] As Figures 1 to 4 shown, this embodiment provides a quick-change structure for an excavator attachment; in the prior art, an excavator includes a boom, an arm, and an attachment; the attachment includes, but is not limited to, a bucket 9 and a breaker; the quick-change structure includes a quick-change cylinder 5, a first quick-change shaft assembly 8A, and a second quick-change shaft assembly 8B; the quick-change cylinder 5 includes a cylinder barrel 5-1 and a piston rod 5-2; a first mounting ring 5-11 is provided on the cylinder barrel 5-1, and the first mounting ring 5-11 is connected to the first quick-change shaft assembly 8A; a second mounting ring 5-21 is provided on the piston rod 5-2, and the second mounting ring 5-21 is connected to the second quick-change shaft 8B assembly.

[0024] In this embodiment, the attachment is a bucket 9. One end of the quick-change cylinder 5 is rotatably connected to the arm 1 through the first quick-change shaft assembly 8A; the other end of the quick-change cylinder 5 is rotatably connected to the two connecting rods 3 through the second quick-change shaft assembly 8B; the two connecting rods 3, the two rockers 4, and the bucket cylinder 2 are rotatably connected through the first rotating shaft 7; the two rockers 4 and the arm 1 are rotatably connected through the second rotating shaft 6; the bucket cylinder 2 and the arm 1 are rotatably connected.

[0025] Two ear plates 9-1 are arranged on the bucket 5 in parallel at intervals; a limiting groove 9-2 is arranged on the two ear plates 9-1; the upper half hole 9-3 and the lower half hole 9-4 are respectively arranged on both sides of the limiting groove 9-2, and the openings of the upper half hole 9-3 and the lower half hole 9-4 in the same ear plate 9-1 are arranged oppositely; the first quick-change shaft assembly 8A is connected with the lower half hole 9-4, and the second quick-change shaft assembly 8B is connected with the upper half hole 9-3 to cooperate with the bucket 9 and the boom 1.

[0026] The first quick-change shaft assembly 8A and the second quick-change shaft assembly 8B include a mounting shaft 8-1, and wear-resistant sleeves 8-3 are arranged at both ends of the mounting shaft 8-1; a bushing 8-4 is arranged between the mounting shaft 8-1 and the wear-resistant sleeve 8-3; the wear-resistant sleeves 8-3 at both ends of the mounting shaft 8-1 in the first quick-change shaft assembly 8A are installed in cooperation with the lower half holes 9-4 of the two ear plates 9-1 on the bucket 9, and the wear-resistant sleeves 8-3 at both ends of the mounting shaft in the second quick-change shaft assembly 8B are installed in cooperation with the upper half holes 9-3 of the two ear plates on the bucket 9.

[0027] A retaining sleeve 8-5 for fixing the wear-resistant sleeve 8-3 is arranged on the mounting shaft 8-1, and the retaining sleeve 8-5 is installed on the mounting shaft 8-1 through a bolt 8-6 or a positioning pin. In this embodiment, through holes are arranged on the retaining sleeve 8-5 and the mounting shaft 8-1, and the bolt 8-6 passes through the retaining sleeve 8-5 and the mounting shaft 8-1 and then is connected with a nut 8-7; one end of the wear-resistant sleeve 8-3 abuts against the shaft shoulder of the mounting shaft 8-1, and the other end of the wear-resistant sleeve 8-3 abuts against the retaining sleeve 8-5; the wear-resistant sleeve 8-3 avoids the mutual wear between the mounting shaft 8-1 and the bucket 9, and can realize the quick replacement of the wear-resistant sleeve, with low maintenance cost; a plurality of adjusting washers are arranged between the wear-resistant sleeve and the shaft shoulder of the mounting shaft; the adjusting washers are sleeved on the mounting shaft.

[0028] Bucket quick-change process:

[0029] When the bucket 9 needs to be installed, the driver operates the excavator to control the quick-change oil cylinder to extend. First, the first quick-change shaft assembly 8A at the front end of the boom 1 is stuck in the lower half hole 9-4 of the two ear plates 9-1, and the second quick-change shaft assembly 8B is stuck in the upper half hole 9-3; then, the first quick-change shaft assembly 8A and the second quick-change shaft assembly 8B are adjusted through the bucket oil cylinder 6 until the quick-change oil cylinder 5 is tightened to complete the installation; when the bucket needs to be removed, control the quick-change oil cylinder 5 to retract, so that the second quick-change shaft assembly 8B is disengaged from the upper half hole of the two ear plates 9-1, and the bucket removal is completed.

[0030] Installation process:

[0031] After the mounting shaft 8-1 is arranged on the first mounting ring 5-11 and the second mounting ring 5-12 on the quick-change oil cylinder 5, the mounting shaft of the first quick-change shaft assembly 8A is sleeved with the front-end bushing of the boom 1; the mounting shaft of the second quick-change shaft assembly 8B is installed in cooperation with the front-end bushing of the connecting rod 3.

[0032] Then, an adjusting washer 8-2 is installed on the mounting shaft, and wear-resistant sleeves 8-3 and bushings 8-4 are sleeved on both ends of the mounting shaft 8-1; the bushing 8-4 is arranged between the mounting shaft 8-1 and the wear-resistant sleeve 8-3; the wear-resistant sleeve 8-3 is fixed by a stop sleeve 8-5, and a bolt 8-6 is passed through the stop sleeve 8-5 and the mounting shaft 8-1 and then connected to a nut 8-7. One end of the wear-resistant sleeve 8-3 abuts against the shaft shoulder of the mounting shaft 8-1, and the other end of the wear-resistant sleeve 8-3 abuts against the stop sleeve 8-5.

[0033] In this embodiment, the quick replacement of the bucket is realized without changing the distance from the front end of the bucket tooth to the front end of the dipper stick, avoiding potential job safety hazards; the quick-change device is cancelled, avoiding the problem of cracking of the quick-change device. By controlling the telescoping of the quick-change oil cylinder, the quick replacement of the attachment can be completed without hoisting the quick-change device, improving the replacement efficiency of the attachment and construction safety.

[0034] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A quick-change structure for excavator accessories, characterized in that: It includes a quick-change oil cylinder, a first quick-change shaft assembly and a second quick-change shaft assembly; one end of the quick-change oil cylinder is rotatably connected to the bucket arm through the first quick-change shaft assembly; the other end of the quick-change oil cylinder is rotatably connected to two connecting rods through the second quick-change shaft assembly; the two connecting rods, two rocking arms and the attachment oil cylinder are rotatably connected through the first rotating shaft; the two rocking arms and the bucket arm are rotatably connected through the second rotating shaft; Two ear plates are arranged on the attachment in parallel and at intervals; both ear plates are provided with an upper half hole and a lower half hole; the first quick-change shaft assembly cooperates with the lower half hole, and the second quick-change shaft assembly cooperates with the upper half hole to connect the attachment and the boom.

2. The quick-change structure for excavator attachments according to claim 1, characterized in that: The two ear plates are provided with limiting grooves; the upper half hole and the lower half hole are respectively arranged on both sides of the limiting groove, and the opening of the upper half hole and the opening of the lower half hole in the same ear plate are arranged opposite to each other.

3. The quick-change structure for excavator attachments according to claim 1, characterized in that: The first quick-change shaft assembly and the second quick-change shaft assembly include a mounting shaft, and wear-resistant sleeves are arranged at both ends of the mounting shaft; the wear-resistant sleeves at both ends of the mounting shaft in the first quick-change shaft assembly are installed in cooperation with the lower half holes of the two ear plates on the accessory, and the wear-resistant sleeves at both ends of the mounting shaft in the second quick-change shaft assembly are installed in cooperation with the upper half holes of the two ear plates on the accessory.

4. The quick-change structure for excavator attachments according to claim 3, characterized in that: A shaft sleeve is arranged between the installation shaft and the wear-resistant sleeve.

5. The quick-change structure for excavator attachments according to claim 3, characterized in that: A stop sleeve for fixing the wear-resistant sleeve is arranged on the installation shaft, and the stop sleeve is installed on the installation shaft through bolts or positioning pins, one end of the wear-resistant sleeve is against the shoulder of the installation shaft, and the other end of the wear-resistant sleeve is against the stop sleeve.

6. The quick-change structure for excavator attachments according to claim 3, characterized in that: A plurality of adjusting washers are arranged between the wear-resistant sleeve and the shaft shoulder of the mounting shaft; the adjusting washers are sleeved on the mounting shaft.

7. The quick-change structure for excavator attachments according to claim 1, characterized in that: The quick-change oil cylinder comprises an oil cylinder barrel and a piston rod; the oil cylinder barrel is provided with a first mounting ring, and the first mounting ring is connected to the first quick-change shaft assembly; the piston rod is provided with a second mounting ring, and the second mounting ring is connected to the second quick-change shaft assembly.

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