Loose sleeve type pin shaft pull rod structure

Abstract

The utility model provides a loose sleeve type pin shaft pull rod structure, which is used for connecting and detaching two sections of pull rods, and comprises a pin shaft, a positioning shaft sleeve and a positioning pin, an upper lifting lug hole is formed in an upper lifting lug of each pull rod, a lower lifting lug hole is formed in a lower lifting lug of each pull rod, the positioning shaft sleeve penetrates through the upper lifting lug hole of one pull rod and the lower lifting lug hole of the other pull rod to form tight fit connection, and the pin shaft penetrates through the positioning shaft sleeve to form clearance fit connection. And the positioning pin is arranged at the end part of the pin shaft in a penetrating manner to form positioning. A check ring is changed into the positioning shaft sleeve, the shaft sleeve is smaller in mass relative to the pin shaft, the shaft sleeve and the pin shaft are in clearance fit, the pin shaft is easier to disassemble, after the shaft sleeve is disassembled, the pin shaft is in clearance fit with the upper pull rod and the lower pull rod, shaft penetrating and disengaging can be easily achieved, and convenience and time and labor saving are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of water conservancy facilities, and in particular relates to a loose sleeve type pin shaft pull rod structure. Background Art

[0002] like Figure 1 As shown in the figure, the lifting and lowering control of the sluice gate is realized by the hoist, and there are several sections of pull rods connected end to end between the two, such as Figure 2 As shown, in the prior art, when connecting the upper and lower pull rods 100, a hole is punched through the pin shaft 3, a retaining ring 4 is placed at the end of the pin shaft 3, and then a positioning pin 5 is inserted into the pin shaft 3 to fix it, and the pull rod connection is completed.

[0003] However, when removing the pin shaft, it is necessary to first pull out the positioning pin 5, then remove the retaining ring 4, and finally remove the pin shaft 3. Since the pin shaft used for the tie rod is heavy and fits tightly with the tie rod hole, the pin shaft is difficult to remove manually and requires the cooperation of several people at the same time or the help of machinery to remove it. In this way, the operation of putting on and taking off the shaft is labor-intensive and time-consuming, which cannot meet the flood prevention and control time requirements of reservoirs or dams. Summary of the invention

[0004] The purpose of the present invention is to provide a loose sleeve type pin shaft pull rod structure, which can facilitate the disassembly of the pin shaft.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a loose sleeve pin pull rod structure, used for connecting and disassembling two sections of pull rods, including a pin, a positioning sleeve and a positioning pin; the upper lifting ear of the pull rod is provided with an upper lifting ear hole, and the lower lifting ear is provided with a lower lifting ear hole, the positioning sleeve is passed through the upper lifting ear hole of one of the pull rods and the lower lifting ear hole of the other pull rod to form a tight fit connection, the pin is passed through the positioning sleeve to form a clearance fit connection, and the positioning pin is passed through the end of the pin to form positioning.

[0006] Furthermore, an upper hanging ear reinforcement portion is provided on the outer side of the upper hanging ear, and a lower hanging ear reinforcement portion is provided on the outer side of the lower hanging ear, and both the upper hanging ear reinforcement portion and the lower hanging ear reinforcement portion are cylindrical structures.

[0007] Furthermore, a positioning structure is provided on the inner side of the upper lifting ear, and the positioning structure has an arc positioning surface matching the outer circular surface of the lower lifting ear reinforcement portion; the central angle corresponding to the arc positioning surface does not exceed 90°; after the lower lifting ear reinforcement portion contacts the arc positioning surface, the upper lifting ear hole and the lower lifting ear hole are coaxially aligned.

[0008] Furthermore, the positioning sleeve has a pivot portion and a first boss arranged at one end of the pivot portion.

[0009] Furthermore, one end of the pivotal portion provided with the first boss is also provided with a second boss having a diameter smaller than that of the first boss, and the second boss and the first boss form a stepped structure.

[0010] Furthermore, the other end of the pivotal portion is provided with an inner chamfer.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The present invention changes the retaining ring into a positioning sleeve. The sleeve has a smaller mass than the pin, and a clearance fit is adopted between the sleeve and the pin, so that the pin is easier to disassemble. After removing the sleeve, the pin and the upper and lower pull rods are clearance matched, and the shaft can be easily put on and taken off, which is convenient, time-saving and labor-saving.

[0013] 2. The end of the positioning sleeve in the present invention is designed as a stepped structure. After installation, there is a certain gap between it and the outer side of the tie rod lifting ear, which provides greater convenience for disassembling the sleeve and makes the disassembly of the sleeve easier.

[0014] 3. The upper lifting ear of the pull rod in the present invention is provided with a positioning structure, which can make the alignment of the upper and lower lifting ears faster, thereby facilitating the installation of the pin shaft and the sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of gate lifting in the prior art;

[0016] Figure 2 It is a connection diagram of the pull rod in the prior art;

[0017] Figure 3 It is a structural schematic diagram of a preferred embodiment of the present invention;

[0018] Figure 4 for Figure 3 A side view of the structure of the tie rod lifting eye in the illustrated embodiment;

[0019] Figure 5 for Figure 3 A structural sectional view of the positioning sleeve in the illustrated embodiment. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] like Figure 3As shown in Figure 5, a loose sleeve pin shaft pull rod structure is used for connecting and disassembling two sections of pull rods 100, including a pin shaft 3, a positioning sleeve 6 and a positioning pin 5.

[0022] The upper ear 2 of the pull rod 100 is provided with an upper ear hole 2.3, and the lower ear 1 thereof is provided with a lower ear hole 1.2. The setting width of the lower ear 1 is smaller than the setting width of the upper ear 2, so when connected, the two lower ears 1 are located between the two upper ears 2. When connected, the lower ear hole 1.2 of the upper pull rod 100 is aligned with the upper ear hole 2.3 of the lower pull rod 100, and then the positioning sleeve 6 is passed through the upper ear hole 2.3 and the lower ear hole 1.2 in sequence to form a tight fit connection. The pin 3 is inserted into the positioning sleeve 6 to form a clearance fit connection with a clearance of 0.5 mm. A positioning boss 3.1 is provided at one end of the pin 3, and a pin hole 3.2 is provided at the other end. The positioning boss 3.1 positions one of the upper ears 2, and the positioning pin 5 is inserted into the pin hole 3.2 to position the other upper ear 2.

[0023] In order to improve the connection strength of the lifting ear, as a preferred example, an upper lifting ear reinforcement part 2.1 is provided on the outer side of the upper lifting ear 2, and a lower lifting ear reinforcement part 1.1 is provided on the outer side of the lower lifting ear 1. Both the upper lifting ear reinforcement part 2.1 and the lower lifting ear reinforcement part 1.1 are cylindrical structures. Obviously, the upper lifting ear hole 2.3 passes through the upper lifting ear reinforcement part 2.1, and the lower lifting ear hole 1.2 passes through the lower lifting ear reinforcement part 1.1.

[0024] In order to enable rapid positioning and alignment, as a preferred example, a positioning structure 2.2 is provided on the inner side of the upper lifting ear 2, and the positioning structure 2.2 has an arc positioning surface that matches the outer cylindrical surface of the lower lifting ear reinforcement portion 1.1. The central angle corresponding to the arc positioning surface does not exceed 90°. After the lower lifting ear reinforcement portion 1.1 contacts the arc positioning surface, the upper lifting ear hole 2.3 and the lower lifting ear hole 1.2 are coaxially aligned. As a preferred example, the positioning structure 2.2 is a semicircular annular portion. The purpose of providing the arc positioning surface is not only to achieve positioning and alignment of the upper and lower lifting ears, but also to enable the upper and lower pull rods 100 to rotate around the center line of the pin 3.

[0025] As a preferred example, the positioning sleeve 6 has a pivoting portion 6.1 and a first boss 6.2 arranged at one end of the pivoting portion 6.1. In order to facilitate the disassembly of the positioning sleeve 6, as a preferred example, one end of the pivoting portion 6.1 provided with the first boss 6.2 is also provided with a second boss 6.3 having a diameter smaller than the diameter of the first boss 6.2, and the second boss 6.3 and the first boss 6.2 form a stepped structure. After the positioning sleeve 6 is installed, a gap of 2 mm is formed between the first boss 6.2 and the upper lifting ear reinforcement portion 2.1, which makes it easier to insert the disassembly tool, thereby providing greater convenience for the disassembly of the positioning sleeve 6.

[0026] In order to facilitate the insertion of the pin shaft 3 from the other end of the pivoting portion 6.1, as a preferred example, the other end of the pivoting portion 6.1 is provided with an inner chamfer 6.4.

[0027] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

[0028] It should be noted that the above specific implementation methods are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified and replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A loose sleeve pin pull rod structure, used for connecting and disassembling two pull rods (100), characterized in that: The invention comprises a pin shaft (3), a positioning sleeve (6) and a positioning pin (5); the upper lifting ear (2) of the pull rod (100) is provided with an upper lifting ear hole (2.3), and the lower lifting ear (1) is provided with a lower lifting ear hole (1.2); the positioning sleeve (6) is inserted into the upper lifting ear hole (2.3) of one pull rod (100) and the lower lifting ear hole (1.2) of the other pull rod (100) to form a tight fit connection; the pin shaft (3) is inserted into the positioning sleeve (6) to form a clearance fit connection; and the positioning pin (5) is inserted into the end of the pin shaft (3) to form a positioning.

2. A loose sleeve pin pull rod structure according to claim 1, characterized in that: An upper lifting ear reinforcement portion (2.1) is arranged on the outer side of the upper lifting ear (2), and a lower lifting ear reinforcement portion (1.1) is arranged on the outer side of the lower lifting ear (1), and both the upper lifting ear reinforcement portion (2.1) and the lower lifting ear reinforcement portion (1.1) are cylindrical structures.

3. A loose sleeve pin pull rod structure according to claim 2, characterized in that: A positioning structure (2.2) is provided on the inner side of the upper lifting ear (2), and the positioning structure (2.2) has an arc positioning surface that matches the outer cylindrical surface of the lower lifting ear reinforcement portion (1.1); the central angle corresponding to the arc positioning surface does not exceed 90°; after the lower lifting ear reinforcement portion (1.1) contacts the arc positioning surface, the upper lifting ear hole (2.3) and the lower lifting ear hole (1.2) are coaxially aligned.

4. A loose sleeve type pin pull rod structure according to claim 3, characterized in that: The positioning sleeve (6) comprises a pivot portion (6.1) and a first boss (6.2) arranged at one end of the pivot portion (6.1).

5. A loose sleeve type pin pull rod structure according to claim 4, characterized in that: One end of the pivoting portion (6.1) provided with the first boss (6.2) is also provided with a second boss (6.3) having a diameter smaller than that of the first boss (6.2); the second boss (6.3) and the first boss (6.2) form a stepped structure.

6. A loose sleeve type pin pull rod structure according to claim 5, characterized in that: The other end of the pivoting portion (6.1) is provided with an inner chamfer (6.4).

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