Excavator movable arm pin shaft drawing device

Abstract

The utility model discloses an excavator movable arm pin shaft drawing device, which belongs to the technical field of excavators and comprises a bolt lead screw, a first steel plate and a first nut are arranged on the bolt lead screw, and the first nut is arranged at one end of the first steel plate. First round steel is arranged on the peripheral side of the first nut, one end of the first round steel is connected with the first steel plate, and the other end of the first round steel penetrates through the second steel plate to be connected with the supporting plate; thrust ball bearings and nuts are arranged at the two ends of the second steel plate; second round steel is arranged on the second steel plate, and a pin shaft connecting plate is arranged at one end of the second round steel. Pin shaft drawing can be achieved, rapid assembly is achieved, and the production efficiency is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of excavators, and in particular relates to a boom pin pulling device for an excavator. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] An excavator is an indispensable machine in the field of engineering machinery. An excavator, also known as an excavating machine, is an earth-moving machine that uses a bucket to dig materials above or below the base surface and load the materials into transport vehicles or unload them to a stockpile.

[0004] The excavator boom cylinder is connected to the boom's intermediate shaft seat via a pin, enabling the boom to be raised and lowered. During installation, the pin is typically installed by first inserting one end into the boom's shaft seat and then pressing the entire pin into place. During this process, the hydraulic rod lug on the other side of the pin is suspended in the air, requiring axis alignment. This pin assembly method is not only complex and difficult to operate, but also easily damages components near the pin due to knocks, resulting in low work efficiency. Utility Model Content

[0005] In view of the above problems, the utility model provides an excavator boom pin pulling device, which can realize pin pulling, achieve rapid assembly, and effectively improve production efficiency.

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

[0007] A pin shaft pulling device for an excavator boom includes a bolt screw, a first steel plate and a first nut are arranged on the bolt screw, and one end of the first steel plate is the first nut; a first round steel is arranged on the circumferential side of the first nut, one end of the first round steel is connected to the first steel plate, and the other end of the first round steel passes through the second steel plate and is connected to a support plate; thrust ball bearings and nuts are arranged at both ends of the second steel plate; a second round steel is arranged on the second steel plate, and a pin shaft connecting plate is arranged at one end of the second round steel.

[0008] Furthermore, the screw bolt passes through the first steel plate and the second steel plate, and the screw bolt is detachably connected to the first steel plate and the second steel plate.

[0009] Furthermore, a second nut is provided at one end of the first round steel, and the second nut connects the first steel plate and the first round steel.

[0010] Furthermore, a plurality of the first round steels are arranged at intervals around the first nut.

[0011] Furthermore, the end of the bolt screw passes through the middle of the second steel plate, and a first thrust ball bearing is provided at one end of the second steel plate.

[0012] Furthermore, a third nut is provided at one end of the first thrust ball bearing, and the third nut and the first thrust ball bearing are both sleeved on the bolt screw, and the third nut presses the first thrust ball bearing onto the surface of the second steel plate.

[0013] Furthermore, a second thrust ball bearing is provided at the other end of the second steel plate, and a fourth nut is provided at one end of the second thrust ball bearing.

[0014] Furthermore, the fourth nut and the second thrust ball bearing are both sleeved on the bolt screw, and the fourth nut presses the second thrust ball bearing onto the other surface of the second steel plate.

[0015] Furthermore, a plurality of second round steels are arranged at intervals around the fourth nut, one end of the second round steel is connected to the second steel plate, and the other end of the second round steel is connected to the pin connecting plate.

[0016] Furthermore, a plurality of circular holes are arranged at intervals on the pin connecting plate.

[0017] Compared with the prior art, the advantages and positive effects of this utility model are:

[0018] 1. The utility model takes into account the convenience during use. The pin shaft can be pulled out by simply rotating the hexagonal bolt head on the top of the bolt screw. The pin shaft can be pulled out, and the pin shaft can be quickly assembled, which effectively improves production efficiency.

[0019] 2. The second steel plate of this utility model penetrates the first round steel at its edge, providing guidance and improving strength and stability during movement. The first steel plate and first round steel are connected by a second nut, facilitating replacement of wearing parts and convenient maintenance. Furthermore, tightening the double nuts prevents thread loosening, improving safety.

[0020] 3. The utility model is provided with a first thrust ball bearing and a second thrust ball bearing. When the thread rotates upward, a rotational force can be applied to the thrust ball bearing through the first thrust ball bearing and the second thrust ball bearing to ensure the linear motion of the second steel plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0022] Figure 1 This is a structural diagram of the excavator boom pin pulling device of the utility model;

[0023] In the figure: 1. Bolt screw; 2. First nut; 3. Second nut; 4. First steel plate; 5. First round steel; 6. Third nut; 7. First thrust ball bearing; 8. Second steel plate; 9. Second thrust ball bearing; 10. Fourth nut; 11. Second round steel; 12. Pin connecting plate; 13. Support plate. DETAILED DESCRIPTION

[0024] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0025] The excavator boom cylinder is connected to the boom's intermediate shaft seat via a pin, enabling the boom to be raised and lowered. During installation, the pin is typically installed by first inserting one end into the boom's shaft seat and then pressing the entire pin into place. During this process, the hydraulic rod lug on the other side of the pin is suspended in the air, requiring axis alignment. This pin assembly method is not only complex and difficult to operate, but also easily damages components near the pin due to knocks, resulting in low work efficiency.

[0026] The present invention will be described in detail below with reference to the accompanying drawings. The present embodiment discloses an excavator boom pin pulling device, such as Figure 1 As shown, it includes a bolt screw 1, a first steel plate 4 and a first nut 2 are arranged on the bolt screw 1, and one end of the first steel plate 4 is the first nut 2; a first round steel 5 is arranged on the circumferential side of the first nut 2, one end of the first round steel 5 is connected to the first steel plate 4, and the other end of the first round steel 5 passes through the second steel plate 8 and is connected to the support plate 13; thrust ball bearings and nuts are arranged at both ends of the second steel plate 8; a second round steel 11 is arranged on the second steel plate 8, and a pin connecting plate 12 is arranged at one end of the second round steel 11.

[0027] During installation, weld three first round steels 5 and support plates 13 into the first structure; then weld two second steel plates 8, three second round steels 11, and pin connecting plates 12 into the second structure; insert the second structure into the first structure through the first round steel 5, and insert the first steel plate 4 into the top shoulder of the first round steel 5. Since there is a thread on the top of the first round steel 5, use six second nuts 3 to connect the first steel plate 4 to the first round steel 5. Weld the first nut 2 to the center hole of the first steel plate 4. After all the above is completed, rotate the bolt screw 1 inward through the first nut 2, install the third nut 6, the first thrust ball bearing 7, the second thrust ball bearing 9, and the fourth nut 10 in sequence, and tighten the third nut 6 and the fourth nut 10 so that the first thrust ball bearing 7 and the second thrust ball bearing 9 are pressed tightly against the surface of the second steel plate 8.

[0028] The screw bolt 1 passes through the first and second steel plates 4, 8, forming a removable connection. A second nut 3 is attached to one end of the first round steel bar 5, connecting the two plates. The edge of the second steel plate 8 penetrates the first round steel bar 5, providing guidance and enhancing strength and stability during movement. The second nut 3 connects the first and second round steel plates 4, 5, facilitating replacement of wearing parts and simplifying maintenance. Tightening the double nuts prevents thread loosening, enhancing safety.

[0029] Several first round steel bars 5 are arranged at intervals around the first nut 2. Three first round steel bars 5 are arranged at intervals, and the three first round steel bars 5 are used for guidance, so that the second steel plate 8 can be more stable when moving and has a better guiding effect.

[0030] The end of the screw bolt 1 passes through the middle of the second steel plate 8, and a first thrust ball bearing 7 is provided at one end of the second steel plate 8. A third nut 6 is provided at one end of the first thrust ball bearing 7. The third nut 6 and the first thrust ball bearing 7 are both sleeved on the screw bolt 1, and the third nut 6 presses the first thrust ball bearing 7 against the surface of the second steel plate 8. A second thrust ball bearing 9 is provided at the other end of the second steel plate 8, and a fourth nut 10 is provided at one end of the second thrust ball bearing 9. The fourth nut 10 and the second thrust ball bearing 9 are both sleeved on the screw bolt 1, and the fourth nut 10 presses the second thrust ball bearing 9 against the other surface of the second steel plate 8.

[0031] When the thread rotates upward, the first and second thrust ball bearings 7 and 9 exert a rotational force on the thrust ball bearings, thereby ensuring the linear motion of the second steel plate 8. The third and fourth nuts 6 and 10 are tightened to press the first and second thrust ball bearings 7 and 9 against the surface of the second steel plate 8, thereby ensuring the stable operation of the thrust ball bearings.

[0032] A plurality of second round steel bars 11 are arranged at intervals around the fourth nut 10. One end of the second round steel bar 11 is connected to the second steel plate 8, and the other end of the second round steel bar 11 is connected to the pin connecting plate 12. Three second round steel bars 11 are provided to make the connection between the second steel plate 8 and the pin connecting plate 12 more secure.

[0033] A plurality of circular holes are arranged at intervals on the pin connecting plate 12. Three circular holes are arranged on the pin connecting plate 12, and the three circular holes cooperate with bolts to connect the pin connecting plate 12 to the pin, and then perform subsequent drawing work.

[0034] When the pin shaft pulling device is in use, after the pin shaft connecting plate 12 is connected to the pin shaft by bolts, the hexagonal bolt head at the top of the bolt screw 1 can be rotated to move the pin shaft connecting plate 12 inward and outward to achieve the purpose of pin shaft pulling. The design takes into account the convenience during use. The pin shaft can be pulled out by simply rotating the hexagonal bolt head at the top of the bolt screw 1. It can realize pin shaft pulling, realize the rapid assembly of the pin shaft, and effectively improve production efficiency.

[0035] Although the above description of the specific implementation methods of the present invention is combined with the accompanying drawings, it does not limit the scope of protection of the present invention. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present invention, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the present invention.

Claims

1. An excavator boom pin pulling device, characterized in that: It includes a bolt screw, a first steel plate and a first nut are arranged on the bolt screw, one end of the first steel plate is the first nut; a first round steel is arranged on the circumferential side of the first nut, one end of the first round steel is connected to the first steel plate, and the other end of the first round steel passes through the second steel plate and is connected to the support plate; thrust ball bearings and nuts are arranged at both ends of the second steel plate; a second round steel is arranged on the second steel plate, and a pin connecting plate is arranged at one end of the second round steel.

2. The excavator boom pin pulling device according to claim 1, characterized in that: The screw bolt passes through the first steel plate and the second steel plate, and the screw bolt is detachably connected to the first steel plate and the second steel plate.

3. The excavator boom pin pulling device according to claim 1, characterized in that: A second nut is provided at one end of the first round steel, and the second nut connects the first steel plate and the first round steel.

4. The excavator boom pin pulling device according to claim 1, characterized in that: A plurality of the first round steel bars are arranged at intervals around the first nut.

5. The excavator boom pin pulling device according to claim 1, characterized in that: The end of the bolt screw passes through the middle of the second steel plate, and a first thrust ball bearing is provided at one end of the second steel plate.

6. The excavator boom pin pulling device according to claim 5, characterized in that: A third nut is provided at one end of the first thrust ball bearing. The third nut and the first thrust ball bearing are both sleeved on the bolt screw. The third nut presses the first thrust ball bearing against the surface of the second steel plate.

7. The excavator boom pin pulling device according to claim 1, characterized in that: A second thrust ball bearing is provided at the other end of the second steel plate, and a fourth nut is provided at one end of the second thrust ball bearing.

8. The excavator boom pin pulling device according to claim 7, characterized in that: The fourth nut and the second thrust ball bearing are both sleeved on the bolt screw, and the fourth nut presses the second thrust ball bearing onto the other surface of the second steel plate.

9. The excavator boom pin pulling device according to claim 1, characterized in that: A plurality of second round steels are arranged at intervals around the fourth nut. One end of the second round steel is connected to the second steel plate, and the other end of the second round steel is connected to the pin connecting plate.

10. The excavator boom pin pulling device according to claim 1, characterized in that: A plurality of circular holes are arranged at intervals on the pin connecting plate.

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