Pin shaft locking structure and mining dump truck

Abstract

The utility model discloses a pin shaft locking structure and a mining dump truck. The pin shaft locking structure comprises a first component, a second component, a pin shaft, a first limiting component and a second limiting component, pin shaft holes are formed in the first component and the second component, and the second component is inserted into the first component until the pin shaft holes of the first component and the second component are aligned; the pin shaft penetrates into the pin shaft holes in the first component and the second component, so that the first component and the second component are hinged together; the first limiting component is arranged at one end of the pin shaft and used for preventing the pin shaft from rotating in the radial direction. The second limiting component is arranged at the other end of the pin shaft and used for preventing the pin shaft from axially moving. Axial transmission and radial rotation of the pin shaft are effectively prevented, abrasion of the pin shaft, the first component and the second component is avoided, and the risk that the pin shaft falls off due to severe working conditions is more effectively avoided; the structure is simple, cost is low, manufacturing is convenient, and reliability is high.

Description

Technical Field

[0001] The utility model relates to a pin shaft locking structure and belongs to the technical field of dump trucks. Background Art

[0002] There are many pins used on dump trucks, and the pins are often fixed by cotter pins or slotted nuts plus cotter pins. In some key positions of the vehicle, the pins are subjected to greater forces, and the cotter pins at the fixed end of the pins are often damaged and fall off. The pins at the slotted nut fixing point have stress concentration due to different cross-sections, and the pins are prone to breakage at this point, causing safety accidents in the vehicle and economic losses to customers. In addition, slotted nuts, cotter pins, gaskets, etc. are all purchased parts, and the procurement and transportation costs are relatively high. How to effectively fix the pins and prevent them from falling off is an urgent problem to be solved in pin locking. Summary of the invention

[0003] In view of the deficiencies in the prior art, the utility model provides a pin locking structure, which effectively prevents axial transmission and radial rotation of the pin, avoids wear of the pin and structural parts, and more effectively avoids the risk of the pin falling off due to harsh working conditions.

[0004] The utility model is implemented according to the following technical solutions:

[0005] In a first aspect, the utility model discloses a pin locking structure, which is characterized by comprising:

[0006] The first component and the second component are both provided with a pin shaft hole, and the second component is inserted into the first component until the pin shaft holes of the two components are aligned;

[0007] A pin is inserted into the pin holes on the first component and the second component to hinge the first component and the second component together;

[0008] A first limiting component is arranged at one end of the pin shaft and is used to prevent the pin shaft from rotating radially;

[0009] The second limiting component is arranged at the other end of the pin shaft and is used to prevent the pin shaft from axial movement.

[0010] In some embodiments, the pin shaft consists of a rod and a convex ring fixed at one end of the rod; the outer diameter of the convex ring is larger than the inner diameter of the pin shaft hole, and the rod portion is inserted into the pin shaft holes on the first component and the second component from one side until the convex ring abuts against the outer side surface of the first component, and the rod portion can extend out from the other end to a preset length.

[0011] In some embodiments, the first limiting component is a stopper; a portion of the radial circumferential surface of the convex ring is milled off, and the stopper is fixed on the outer surface of the first component after contacting the milled-off horizontal end surface of the convex ring.

[0012] In some embodiments, the thickness of the stop block is not less than the thickness of the convex ring, and the length of the stop block is not less than the outer diameter of the convex ring; the stop block is fixed directly above the outer side surface of the pin shaft hole of the first component to prevent foreign objects from hitting the convex ring.

[0013] In some embodiments, the second limiting component is a tower cap and a bolt; a radial and penetrating pin hole is provided at the portion where the rod of the pin shaft extends from the first component; the tower cap is sleeved on the portion where the rod of the pin shaft extends from the first component, and the tower cap and the rod of the pin shaft are clearance-matched; a through hole coaxially arranged with the pin hole of the pin shaft is provided on one side of the tower cap, and a threaded hole coaxially arranged with the pin hole of the pin shaft is provided on the other side of the tower cap, and the bolt passes through the through hole of the tower cap and the pin hole of the pin shaft and is tightened in the threaded hole of the tower cap.

[0014] In some embodiments, the through hole of the tower cap is a countersunk hole, so that the head of the bolt falls completely into the tower cap to prevent foreign objects from hitting the bolt.

[0015] In some embodiments, the axis of the pin hole on one side of the pin shaft is perpendicular to the horizontal end surface of the convex ring on the other side of the pin shaft that is milled off.

[0016] In some embodiments, a mounting hole is provided at the center of the axial surface of the pin shaft with a convex ring, and a lubrication channel is provided in the rod portion of the pin shaft, one end of the lubrication channel is connected to the mounting hole, and the other end of the lubrication channel contacts the middle of the spiral lubrication groove on the second component.

[0017] In some embodiments, the mounting hole is a countersunk hole, and a straight-through oil cup for lubrication is installed at the countersunk hole, and the straight-through oil cup has a protective cap.

[0018] In a second aspect, the utility model discloses a mining dump truck equipped with the above-mentioned pin shaft locking structure.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] 1. Effectively prevent the axial movement and radial rotation of the pin, avoid wear of the pin, the first component and the second component, and more effectively avoid the risk of the pin 4 falling off due to poor working conditions.

[0021] 2. The stopper is fixed just above the outer side of the pin shaft hole of the first component, which can effectively avoid the risk of the convex ring at one end of the pin shaft being damaged, thereby improving the service life and reliability of the pin shaft.

[0022] 3. The straight oil cup is installed in the countersunk hole at one end of the pin shaft convex ring and is equipped with a protective cap, which can effectively prevent the oil cup from being damaged and prevent dust from clogging the lubrication.

[0023] 4. The tower cap is provided with a countersunk hole to allow the bolt head to sink into the tower cap to prevent the bolt from being hit by force and causing the pin shaft to fall off.

[0024] 5. Compared with the traditional pin locking structure, it has simple structure, low cost, easy production and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation on the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0026] In the attached picture:

[0027] Figure 1 Axonometric measurement of the pin locking structure of the utility model Figure 1 ;

[0028] Figure 2 Axonometric measurement of the pin locking structure of the utility model Figure 2 ;

[0029] Figure 3 It is a cross-sectional view of the pin locking structure of the utility model.

[0030] Figure identification: 1-first component, 2-second component, 3-stopper, 4-pin shaft, 5-through oil cup, 6-tower cap, 7-spring washer, 8-hexagon socket bolt.

[0031] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. Implementation

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0033] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] like Figure 1 , Figure 2 , Figure 3 As shown, a pin locking structure includes a first component 1, a second component 2, a pin 4, a first limiting component and a second limiting component; the first component 1 and the second component 2 are both provided with pin holes, and the second component 2 is inserted into the first component 1 until the pin holes of the two are aligned; the pin 4 penetrates the pin holes on the first component 1 and the second component 2, and the first component 1 and the second component 2 are hingedly connected together; the first limiting component is arranged at one end of the pin 4 to prevent the radial rotation of the pin 4; the second limiting component 2 is arranged at the other end of the pin 4 to prevent the axial movement of the pin 4. The utility model effectively prevents the axial transmission and radial rotation of the pin 4, avoids the wear of the pin 4, the first component 1 and the second component 2, and more effectively avoids the risk of the pin 4 falling off due to bad working conditions; it has a simple structure, low cost, convenient manufacturing and high reliability.

[0036] A preferred embodiment of the above embodiment with respect to the pin is given below:

[0037] like Figure 1 , Figure 2 , Figure 3 As shown, the pin 4 consists of a rod and a convex ring fixed at one end of the rod; the outer diameter of the convex ring is larger than the inner diameter of the pin hole, and the rod is inserted into the pin holes on the first component 1 and the second component 2 from one side until the convex ring abuts against the outer side surface of the first component 1, and the rod can extend from the other end to a preset length.

[0038] A preferred embodiment of the first limiting component in the above embodiment is given below:

[0039] like Figure 1 , Figure 2 , Figure 3 As shown, the first limiting component is a stopper 3; a portion of the radial circumferential surface of the convex ring is milled off, and the stopper 3 is fixed on the outer surface of the first component 1 after contacting with the milled-off horizontal end surface of the convex ring.

[0040] Further solutions: Figure 1 , Figure 2 , Figure 3As shown, the thickness of the stopper 3 is not less than the thickness of the convex ring, and the length of the stopper 3 is not less than the outer diameter of the convex ring; the stopper 3 is fixed just above the outer side surface of the pin shaft hole of the first component 1, which can effectively avoid the risk of the convex ring at one end of the pin shaft 4 being damaged, thereby improving the service life and reliability of the pin shaft 4.

[0041] A preferred embodiment of the second limiting component in the above embodiment is given below:

[0042] like Figure 1 , Figure 2 , Figure 3 As shown, the second limiting component is a tower cap 6 and a hexagon socket bolt 8; a radial and penetrating pin hole is provided at the portion where the rod of the pin shaft 4 extends out from the first component 1; the tower cap 6 is mounted on the portion where the rod of the pin shaft 4 extends out from the first component 1, and the tower cap 6 and the rod of the pin shaft 4 are clearance-matched; a through hole coaxially arranged with the pin hole of the pin shaft 4 is provided on one side of the tower cap 6, and a threaded hole coaxially arranged with the pin hole of the pin shaft 4 is provided on the other side of the tower cap 6, and the hexagon socket bolt 8 passes through the spring washer 7, the through hole of the tower cap 6, and the pin hole of the pin shaft 4 and is tightened in the threaded hole of the tower cap 6.

[0043] Further solutions: Figure 3 As shown, the through hole of the tower cap 6 is a countersunk hole, so that the head of the hexagon socket bolt 8 falls completely into the tower cap 6, preventing the bolt from being hit by force and causing the pin shaft to fall off.

[0044] Further solutions: Figure 3 As shown, the axis of the pin hole on one side of the pin shaft 4 is perpendicular to the horizontal end surface of the convex ring on the other side of the pin shaft 4 that has been milled off.

[0045] Further solutions: Figure 3 As shown, a mounting hole is provided at the center of the axial surface of the pin shaft 4 with the convex ring, and a lubrication channel is provided in the rod portion of the pin shaft 4. One end of the lubrication channel is connected to the mounting hole, and the other end of the lubrication channel contacts the middle of the spiral lubrication groove on the second component 2.

[0046] Further solutions: Figure 3 As shown, the mounting hole is a countersunk hole, and a straight-through oil cup 5 for lubrication is installed at the countersunk hole. The straight-through oil cup 5 has a protective cap, which can effectively prevent the oil cup from being damaged and prevent dust from clogging the lubrication.

[0047] In summary, the utility model provides a pin locking structure, including a first component, a second component, a tower cap and a pin, the first component and the second component are both provided with a pin hole, the pin penetrates the pin hole on the first component and the second component, and the first component and the second component are hingedly connected together; a convex ring with an outer diameter larger than the pin hole is provided on one end of the pin, one side of the convex ring is milled off, a stopper for preventing the pin from rotating is fixed on the first component, and the stopper contacts the milled off side of the convex ring of the pin; a pin hole is provided at the other end of the pin, and a tower cap is assembled at one end of the pin where the pin hole is provided, the tower cap and the pin are clearance-matched, a pin hole is provided on one side of the tower cap, and a threaded hole is provided on the other side, and the tower cap and the pin are locked together by a hexagon socket bolt and a spring washer. The utility model effectively prevents the axial transmission and radial rotation of the pin, avoids the wear of the pin and the structural parts, and more effectively avoids the risk of the pin falling off due to bad working conditions. The utility model has simple structure, low cost, convenient manufacture and high reliability.

[0048] The utility model also discloses a mining dump truck, which is equipped with the pin shaft locking structure.

[0049] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0050] In addition, those skilled in the art will understand that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments also means being within the scope of protection of the present utility model and forming different embodiments. For example, in the above embodiments, those skilled in the art can use them in combination according to the known technical solutions and the technical problems to be solved by the present application.

[0051] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this patent can make some changes or modify the technical content suggested above into an equivalent embodiment with equivalent changes without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of the solution of the utility model.

Claims

1. A pin locking structure, characterized in that: include: The first component and the second component are both provided with a pin shaft hole, and the second component is inserted into the first component until the pin shaft holes of the two components are aligned; A pin is inserted into the pin holes on the first component and the second component to hinge the first component and the second component together; A first limiting component is arranged at one end of the pin shaft and is used to prevent the pin shaft from rotating radially; The second limiting component is arranged at the other end of the pin shaft and is used to prevent the pin shaft from axial movement.

2. A pin locking structure according to claim 1, characterized in that: The pin shaft is composed of a rod portion and a convex ring fixed at one end of the rod portion; The outer diameter of the convex ring is larger than the inner diameter of the pin hole, and the rod is inserted into the pin holes on the first and second components from one side until the convex ring abuts against the outer side of the first component, and the rod can extend from the other end to a preset length.

3. A pin locking structure according to claim 2, characterized in that: The first limiting component is a stopper; A portion of the radial circumferential surface of the convex ring is milled off, and the stopper is fixed on the outer side surface of the first component after contacting with the milled off horizontal end surface of the convex ring.

4. A pin locking structure according to claim 3, characterized in that: The thickness of the stopper is not less than the thickness of the convex ring, and the length of the stopper is not less than the outer diameter of the convex ring; The stopper is fixed just above the outer side surface of the pin shaft hole of the first component to prevent foreign objects from hitting the convex ring.

5. The pin locking structure according to claim 2, characterized in that: The second limiting component is a tower cap and a bolt; A radial and penetrating pin hole is provided at the position where the rod portion of the pin shaft extends out from the first member; The tower cap is sleeved on the portion of the pin shaft where the rod portion extends from the first component, and the tower cap and the pin shaft have clearance fit; A through hole coaxially arranged with the pin hole of the pin shaft is provided on one side of the tower cap, and a threaded hole coaxially arranged with the pin hole of the pin shaft is provided on the other side of the tower cap. The bolt passes through the through hole of the tower cap and the pin hole of the pin shaft and is tightened in the threaded hole of the tower cap.

6. A pin locking structure according to claim 5, characterized in that: The through hole of the tower cap is a countersunk hole, so that the head of the bolt falls completely into the tower cap to prevent foreign objects from hitting the bolt.

7. A pin locking structure according to claim 5, characterized in that: The axis of the pin hole on one side of the pin shaft is perpendicular to the milled-off horizontal end surface of the convex ring on the other side of the pin shaft.

8. The pin locking structure according to claim 2, characterized in that: A mounting hole is arranged at the center of the axial surface of the pin shaft with the convex ring, and a lubrication channel is arranged in the rod portion of the pin shaft, one end of the lubrication channel is connected with the mounting hole, and the other end of the lubrication channel contacts with the middle of the spiral lubrication groove on the second component.

9. A pin locking structure according to claim 8, characterized in that: The mounting hole is a countersunk hole, and a straight-through oil cup for lubrication is installed at the countersunk hole. The straight-through oil cup is provided with a protective cap.

10. A mining dump truck, characterized in that: A pin locking structure according to any one of claims 1 to 9 is installed.

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