Loader accessory quick-changing mechanism

Abstract

The utility model provides a loader accessory quick-change mechanism, which belongs to the technical field of loaders, and comprises a quick-change bracket and a quick-change accessory, the quick-change bracket is connected with a loader movable arm and a pull rod, and the quick-change bracket is detachably connected with the quick-change accessory; accessory fixing devices are arranged at the two ends of the quick-change bracket, each accessory fixing device comprises a first fixing plate and a second fixing plate, connecting holes are formed in the lower portions of the first fixing plates and the lower portions of the second fixing plates, fixing blocks are arranged on one sides of the connecting holes, mounting holes are formed in the fixing blocks, and the connecting holes correspond to the mounting holes. The top end and the bottom end of the fixing block are in bolted connection with adjusting bolts, and the ends of the adjusting bolts are located in the mounting holes. According to the utility model, the accessory can be quickly replaced, and the accessory replacement efficiency is improved.

Description

Technical Field

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

[0002] During the on-site construction of excavators, it is often necessary to replace auxiliary tools according to the actual working conditions. The traditional method of manually replacing attachments not only has a high labor intensity and long disassembly and assembly time, but also frequent disassembly of attachments is likely to cause a certain degree of damage to the relevant connection parts of the working device. Therefore, quick-change devices for excavator attachments have emerged on the market. Existing attachment quick-change devices can generally be divided into two categories: mechanical and hydraulic.

[0003] For mechanical quick changes, most products use lead screws to achieve the disassembly, installation, and fastening of attachments. When switching attachments, tools such as wrenches are required to slowly rotate the lead screw, resulting in low efficiency.

[0004] For hydraulic quick changes, it is necessary to modify the excavator pipeline and hydraulic system to achieve relevant functions, which increases the manufacturing cost. Moreover, due to the addition of the quick-change hydraulic system, the overall machine control system becomes more complex, and there is a risk that the driver may misoperate the oil circuit switch and cause a miss. Content of the Utility Model

[0005] Aiming at the defects or deficiencies in the prior art, the utility model provides a quick-change structure for loader attachments, which can achieve the quick replacement of attachments and improve the efficiency of attachment replacement.

[0006] To achieve the above object, the utility model adopts the following technical solutions:

[0007] An embodiment of the utility model provides a quick-change mechanism for loader attachments, including a quick-change bracket and a quick-change attachment. The quick-change bracket is connected to the loader boom and the tie rod, and the quick-change bracket and the quick-change attachment are detachably connected;

[0008] Attachment fixing devices are arranged at both ends of the quick-change bracket. The attachment fixing device includes a first fixing plate and a second fixing plate. Connecting holes are opened at the lower parts of the first fixing plate and the second fixing plate. A fixing block is arranged on one side of the connecting hole. An installation hole is opened on the fixing block. The connecting hole and the installation hole are arranged corresponding to each other. Adjusting bolts are bolted to the top end and the bottom end of the fixing block, and the end part of the adjusting bolt is located in the installation hole.

[0009] Further, the quick-change bracket includes a first support beam and a second support beam. The first support beam is located above the second support beam, and the first support beam and the second support beam are arranged in parallel.

[0010] Further, two pull rod ear plates are symmetrically arranged on the first support beam. A first shaft hole is provided on the pull rod ear plate, and the quick-change bracket is connected to the loader pull rod through the pull rod ear plate.

[0011] Further, the attachment fixing device is fixed at both ends of the first support beam. The first fixing plate and the second fixing plate are arranged in parallel, and both ends of the second support beam are respectively fixedly connected to the two second fixing plates.

[0012] Further, second shaft holes are provided at the lower parts of the first fixing plate and the second fixing plate. The two second shaft holes are symmetrically arranged, and the quick-change bracket is connected to the loader boom through the second shaft holes.

[0013] Further, both the connection hole and the mounting hole are oval elongated holes.

[0014] Further, the fixing blocks are located on one side of the first fixing plate away from the second fixing plate and on one side of the second fixing plate away from the first fixing plate.

[0015] Further, a first pin shaft is connected to the tops of the first fixing plate and the second fixing plate. A second pin shaft is further provided at the lower parts of the first fixing plate and the second fixing plate. Both ends of the second pin shaft extend into the connection hole and the mounting hole.

[0016] Further, quick-change ear plates are provided on the back of the quick-change attachment. There are two quick-change ear plates, and the two quick-change ear plates are respectively arranged corresponding to the two attachment fixing devices. A first fixing hole is provided at the top of the quick-change ear plate, and a second fixing hole is provided at the bottom of the quick-change ear plate.

[0017] Further, notches are provided on both the first fixing hole and the second fixing hole. The notch on the first fixing hole is located at the bottom of the first fixing hole, and the notch on the second fixing hole is located at the top of the second fixing hole.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] In the present utility model, fixing blocks are provided on the first fixing plate and the second fixing plate, mounting holes are provided on the fixing blocks, adjusting bolts are provided at both the top and the bottom of the fixing blocks, a second pin shaft is further provided in the mounting hole, the second pin shaft can move in the mounting hole, and the second pin shaft is fixed by using the adjusting bolts. When replacing the attachment, only need to turn the adjusting bolts to replace the attachment, which improves the efficiency of attachment replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the quick-change structure in the embodiment of the present utility model;

[0021] Figure 2Schematic diagram of the overall structure of the quick-change bracket in the embodiment of the present utility model;

[0022] Figure 3 Side view of the quick-change bracket in the embodiment of the present utility model;

[0023] Figure 4 Schematic diagram of the overall structure of the quick-change attachment in the embodiment of the present utility model;

[0024] Figure 5 Side view of the quick-change attachment in the embodiment of the present utility model;

[0025] Among them, 1. Quick-change bracket; 101. First support beam; 102. Second support beam; 103. Tie rod ear plate; 104. First shaft hole; 105. First fixing plate; 106. Second fixing plate; 107. Second shaft hole; 108. First pin shaft; 109. Fixed block; 110. Mounting hole; 111. Adjusting bolt; 112. Second pin shaft; 113. Locking nut; 2. Quick-change attachment; 201. Quick-change ear plate; 202. First fixing hole; 203. Second fixing hole; 204. Notch. Detailed implementation mode

[0026] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0027] A typical implementation mode of the present utility model is as Figure 1 shown. A quick-change mechanism for a loader attachment includes a quick-change bracket 1 and a quick-change attachment 2. The quick-change bracket 1 is connected to the loader boom and the tie rod, and the quick-change bracket 1 and the quick-change attachment 2 are detachably connected.

[0028] As Figure 2 shown, the quick-change bracket 1 includes a first support beam 101 and a second support beam 102. The first support beam 101 is located above the second support beam 102, and the first support beam 101 and the second support beam 102 are arranged in parallel. Two tie rod ear plates 103 are symmetrically arranged on the first support beam 101, and a first shaft hole 104 is provided on the tie rod ear plate 103. The quick-change bracket 1 is connected to the loader tie rod through the tie rod ear plate 103.

[0029] The two ends of the first support beam 101 are fixedly connected with an attachment fixing device. The attachment fixing device includes a first fixing plate 105 and a second fixing plate 106. The first fixing plate 105 and the second fixing plate 106 are arranged in parallel. The two ends of the second support beam 102 are respectively fixedly connected with the two second fixing plates 106. Second shaft holes 107 are provided at the lower parts of the first fixing plate 105 and the second fixing plate 106. The two second shaft holes 107 are symmetrically arranged. The quick-change bracket 1 is connected to the loader boom through the second shaft holes 107.

[0030] The top ends of the first fixing plate 105 and the second fixing plate 106 are connected with a first pin shaft 108.

[0031] Both the lower parts of the first fixing plate 105 and the second fixing plate 106 are provided with connecting holes. The connecting holes are oval long holes. The two connecting holes are symmetrically arranged. On the side of the first fixing plate 105 away from the second fixing plate 106 and on the side of the second fixing plate 106 away from the first fixing plate 105, quick-change devices are provided, such as Figure 3 shown. The quick-change device includes a fixing block 109. The fixing block 109 is located on one side of the connecting hole. An installation hole 110 is provided on the fixing block 109. The cross-sectional shape of the installation hole 110 is the same as that of the connecting hole, both being oval long holes, and the installation hole 110 is correspondingly arranged with the connecting hole.

[0032] Both the top end and the bottom end of the fixing block 109 are provided with bolt holes. The two bolt holes are symmetrically arranged and both are communicated with the installation hole 110. Adjusting bolts 111 are bolt-connected in the bolt holes. The ends of the two adjusting bolts 111 are both located in the installation hole 110.

[0033] A second pin shaft 112 is further provided at the lower parts of the first fixing plate 105 and the second fixing plate 106. Both ends of the second pin shaft 112 extend into the connecting hole and the installation hole 110. Two limiting holes are symmetrically arranged on the outer surface of the end of the second pin shaft 112. The two limiting holes are respectively correspondingly arranged with the two adjusting bolts 111. The end of the adjusting bolt 111 can be inserted into the limiting hole to limit the second pin shaft 112.

[0034] Turn the adjusting bolts 111 at the top end and the bottom end of the fixing block 109 to make the ends of the adjusting bolts 111 inserted into the limiting holes on the outer surface of the second pin shaft 112, so as to fix the second pin shaft 112 by using the two adjusting bolts 111. A locking nut 113 is further provided on the adjusting bolt 111. Tightening the locking nut 113 can lock the adjusting bolt 111 to prevent the adjusting bolt 111 from loosening and affecting the fixing effect.

[0035] By using the first pin shaft 108 and the second pin shaft 112 provided on the first fixing plate 105 and the second fixing plate 106, the connection between the quick-change bracket 1 and the quick-change attachment 2 is realized. Since both the connecting hole and the installation hole 110 are oval long holes, the second pin shaft 112 can move up and down. The position of the second pin shaft 112 is adjusted by the adjusting bolt 111, so as to realize the quick replacement of different attachments.

[0036] Such as Figure 4 and Figure 5As shown in the figure, quick-change lugs 201 are provided on the back of the quick-change attachment 2. There are two quick-change lugs 201, and the two quick-change lugs 201 are respectively arranged corresponding to the two attachment fixing devices. A first fixing hole 202 is provided at the top of the quick-change lug 201, and a second fixing hole 203 is provided at the bottom of the quick-change lug 201. The first fixing hole 202 and the second fixing hole 203 are respectively adapted to the first pin shaft 108 and the second pin shaft 112.

[0037] Notches 204 are provided on both the first fixing hole 202 and the second fixing hole 203. The two notches 204 are arranged oppositely, that is, the notch 204 on the first fixing hole 202 is located at the bottom of the first fixing hole 202, and the notch 204 on the second fixing hole 203 is located at the top of the second fixing hole 203. The first pin shaft 108 can be placed into the first fixing hole 202 from the notch 204 at the bottom of the first fixing hole 202, and the second pin shaft 112 can be placed into the second fixing hole 203 from the notch 204 at the top of the second fixing hole 203, so as to realize the connection between the quick-change attachment 2 and the quick-change bracket 1.

[0038] During use, first place the first pin shaft 108 into the first fixing hole 202 from the notch 204 at the bottom of the first fixing hole 202, and move the second pin shaft 112 upward along the mounting hole 110 so that the second pin shaft 112 is placed into the second fixing hole 203 from the notch 204 at the top of the second fixing hole 203. When the first pin shaft 108 and the second pin shaft 112 are completely stuck in the first fixing hole 202 and the second fixing hole 203, first turn the adjusting bolt 111 at the top of the fixing block 109, and use the adjusting bolt 111 at the top of the fixing block 109 to make the second pin shaft 112 abut against the second fixing hole 203. Then turn the adjusting bolt 111 at the bottom of the fixing block 109 to fix the second pin shaft 112, and lock the adjusting bolt 111 by turning the lock nut 113 on the adjusting bolt 111 to prevent the adjusting bolt 111 from loosening.

[0039] When it is necessary to replace the attachment, turn the lock nut 113 and the adjusting bolt 111 so that the end of the adjusting bolt 111 leaves the outer surface of the second pin shaft 112. At this time, move the second pin shaft 112 upward along the mounting hole 110 so that the second pin shaft 112 disengages from the second fixing hole 203 from the notch 204 at the top of the second fixing hole 203, and then take out the first pin shaft 108 from the notch 204 at the bottom of the second fixing hole 203, and the disassembly of the attachment can be completed.

[0040] When the attachment quick-change mechanism provided by the present utility model replaces the attachment, it is not necessary to disassemble the pin shaft. Only by turning the adjusting bolt can the disassembly and installation of the attachment be completed, thereby realizing the quick replacement of the attachment and improving the efficiency of attachment replacement.

[0041] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A quick-change mechanism for loader attachments, characterized in that: It includes a quick-change bracket and a quick-change attachment, wherein the quick-change bracket is connected to the loader boom and the pull rod, and the quick-change bracket and the quick-change attachment are detachably connected; Both ends of the quick-change bracket are provided with accessory fixing devices, and the accessory fixing devices include a first fixing plate and a second fixing plate. The first fixing plate and the second fixing plate are both provided with connecting holes at the lower part. A fixing block is provided on one side of the connecting hole. The fixing block is provided with a mounting hole. The connecting hole and the mounting hole are arranged correspondingly. The top and bottom ends of the fixing block are bolted connected with adjusting bolts, and the ends of the adjusting bolts are located in the mounting holes.

2. A loader attachment quick-change mechanism as claimed in claim 1, characterized in that: The quick-change bracket includes a first support beam and a second support beam, wherein the first support beam is located above the second support beam, and the first support beam is arranged parallel to the second support beam.

3. A loader attachment quick-change mechanism as claimed in claim 2, characterized in that: Two tie rod ear plates are symmetrically arranged on the first support beam, a first axial hole is opened on the tie rod ear plate, and the quick-change bracket is connected to the loader tie rod through the tie rod ear plate.

4. A loader attachment quick-change mechanism as claimed in claim 2, characterized in that: The attachment fixing device is fixed at both ends of the first support beam, the first fixing plate and the second fixing plate are arranged in parallel, and the two ends of the second support beam are fixedly connected to the two second fixing plates respectively.

5. A loader attachment quick-change mechanism as claimed in claim 1, characterized in that: The first fixing plate and the second fixing plate are both provided with second axial holes at their lower parts, the two second axial holes are symmetrically arranged, and the quick-change bracket is connected to the loader boom through the second axial holes.

6. A loader attachment quick-change mechanism as claimed in claim 1, characterized in that: The connecting hole and the mounting hole are both elliptical long holes.

7. A loader attachment quick-change mechanism as claimed in claim 1, characterized in that: The fixing block is located on a side of the first fixing plate away from the second fixing plate, and on a side of the second fixing plate away from the first fixing plate.

8. The loader attachment quick-change mechanism according to claim 1, characterized in that: A first pin is connected to the top of the first fixing plate and the second fixing plate, and a second pin is also arranged at the bottom of the first fixing plate and the second fixing plate, and both ends of the second pin extend into the connecting hole and the mounting hole.

9. A loader attachment quick-change mechanism as claimed in claim 1, characterized in that: A quick-change ear plate is arranged on the back of the quick-change attachment, and two quick-change ear plates are arranged respectively corresponding to the two attachment fixing devices. A first fixing hole is opened at the top end of the quick-change ear plate, and a second fixing hole is opened at the bottom end of the quick-change ear plate.

10. A loader attachment quick-change mechanism as claimed in claim 9, characterized in that: The first fixing hole and the second fixing hole are both provided with notches, wherein the notch on the first fixing hole is located at the bottom of the first fixing hole, and the notch on the second fixing hole is located at the top of the second fixing hole.

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