CN218624957U - Pin shaft limiting device and crane - Google Patents

Abstract

The utility model belongs to the technical field of engineering machine tool, concretely relates to pin shaft limiting device and crane, wherein, the pin shaft limiting device comprises a first limiting component and a second limiting component which are both fixedly connected with a first connecting piece, and the second limiting component comprises a mounting seat and a second limiting plate which is detachably connected with the mounting seat; wherein, the pulling pin screw rod runs through second spacing subassembly and second limiting plate along the direction of orientation round pin axle body in proper order, and when round pin axle body was located the second position, the second limiting plate was connected with the mount pad and was used for the spacing round pin axle body of butt, and when round pin axle body was located the first position, the second limiting plate broke away from with the mount pad and presss from both sides and locates between round pin axle body and the first spacing subassembly, and first spacing subassembly is used for the spacing round pin axle body of butt. The utility model discloses can prevent that the round pin axle from deviating from to still remain round pin axle and second limiting plate on first connecting piece after the pin pulling, reduced the risk of losing.

Description

Pin shaft limiting device and crane

Technical Field

The utility model belongs to the technical field of engineering machine tool, especially, relate to a round pin axle stop device and hoist.

Background

The hoist is at the operation in-process, and the round pin axle of the junction of each part often can receive impact load and produce the axial float, and at the in-process of round pin axle axial float, the bolt that plays limiting displacement to the round pin axle often can receive frequent shearing action power, and then causes the fracture inefficacy of bolt. Particularly, the pin shaft arranged on the crane arm support is difficult to observe the state of the pin after the crane starts to work, once the pin shaft fails, one part of the connecting pin shaft can be separated from the mounting hole, and the risks of shearing off the stressed mounting pin and turning over the folded arm can be caused in serious cases.

In the prior art, in order to prevent the pin shaft from being separated due to the failure of a spring bolt after the arm support pin shaft is installed in place, a limit baffle is additionally arranged at the tail part of a pin pulling screw rod for connecting the pin shaft to limit the pin shaft, so that double protection is formed. However, when the pin is pulled out in the prior art, the limit baffle and the pin shaft have limit contradictions, the limit baffle needs to be disassembled before the pin shaft is pulled out, and the disassembled limit baffle does not have a proper storage place, so that the limit baffle is inconvenient to store and easy to lose.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a round pin axle stop device and hoist, aim at solving and carry out spacing limit baffle to the round pin axle among the prior art before extracting the round pin axle, need dismantle and can't deposit the technical problem.

In order to achieve the purpose, the utility model provides a pin shaft limiting device, a pin shaft comprises a pin pulling screw rod and a pin shaft body which is inserted on a first connecting piece and a second connecting piece, the pin pulling screw rod is used for assisting in pulling out the pin shaft body so as to enable the pin shaft body to move at a first position and a second position, wherein, the pin shaft limiting device comprises a first limiting component and a second limiting component which are both fixedly connected with the first connecting piece, and the second limiting component comprises a mounting seat and a second limiting plate which is detachably connected with the mounting seat;

wherein, the pulling pin screw rod runs through second spacing subassembly and second limiting plate along the direction of orientation round pin axle body in proper order, and when round pin axle body was located the second position, the second limiting plate was connected with the mount pad and was used for the spacing round pin axle body of butt, and when round pin axle body was located the first position, the second limiting plate broke away from with the mount pad and presss from both sides and locates between round pin axle body and the first spacing subassembly, and first spacing subassembly is used for the spacing round pin axle body of butt.

The embodiment of the utility model provides an in, first spacing subassembly includes the mounting panel and can dismantle the first limiting plate of being connected with the mounting panel, mounting panel and first connecting piece fixed connection, and when the round pin axle body was located the first position, first limiting plate was used for the spacing round pin axle body of butt.

The embodiment of the utility model provides an in, all be equipped with the through hole coaxial with the pull pin screw rod on first limiting plate and the second limiting plate, pull pin screw rod includes the pole head and the body of rod, and the pole head is located one side that the round pin axle body was kept away from to first limiting plate, and the body of rod passes the through hole on first limiting plate and the second limiting plate in proper order and with this body coupling of round pin axle.

In the embodiment of the utility model, the diameter of pole head and round pin axle body all is greater than the diameter of through hole.

The embodiment of the utility model provides an in, the axis of first limiting plate and the parallel interval arrangement of second limiting plate and perpendicular to pull out the round pin screw rod.

The embodiment of the utility model provides an in, the distance of first limiting plate and second limiting plate is greater than the thickness of second connecting piece.

The embodiment of the utility model provides an in, the tip of mount pad and the periphery wall interval arrangement of round pin axle body.

The embodiment of the utility model provides an in, the farthest distance of the edge of second limiting plate to the axis of round pin axle body is less than the nearest distance of the edge of first connecting piece to the axis of round pin axle body.

The embodiment of the utility model provides an in, the mount pad includes two otic placodes of parallel interval arrangement, and the second limiting plate clamp is established between two otic placodes and fixed through dismantling fastening component.

In the embodiment of the present invention, a crane is further provided, wherein the crane includes a first arm support, a second arm support, a pin and the pin limiting device as described above, and the pin is used for connecting the first arm support and the second arm support.

Through the technical scheme, the embodiment of the utility model provides a round pin axle stop device has following beneficial effect:

the utility model discloses set up first spacing subassembly and second limiting plate and spacing the round pin axle body respectively to first position and second position, the second limiting plate passes through the spacing round pin axle body of butt in the second position, can prevent that the round pin axle from deviating from; first spacing subassembly passes through the spacing round pin axle body of butt in the first position, can be when disconnection first connecting piece and second connecting piece are connected, will sell axle and second limiting plate and keep on first connecting piece, realized an organic whole and preserved transportation and use, reduced the risk that round pin axle and second limiting plate lost.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide an understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is a schematic structural view of a pin shaft limiting device according to an embodiment of the present invention when a pin shaft body is completely inserted into a first connecting member;

fig. 2 is a schematic structural view of the pin shaft limiting device according to an embodiment of the present invention when the pin shaft body is partially separated from the first connecting member;

fig. 3 is a schematic structural view of a second limiting assembly according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a second limiting plate according to an embodiment of the present invention.

Description of the reference numerals

Detailed Description

The following describes in detail embodiments of the present invention with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the present invention.

The pin shaft limiting device according to the present invention is described below with reference to the drawings.

In the existing truss arm connecting structure of a large-tonnage crane, because a pin shaft is heavy, the operation of inserting and pulling the pin shaft is difficult to perform manually, and the operation needs to be performed by means of an oil cylinder, a pin pulling screw rod 52 for assisting pin pulling is often connected to the end part of the pin shaft, a pin pulling oil cylinder is arranged in the middle of the cross section of an arm support, and the pin pulling oil cylinder completes the insertion and pulling of the pin shaft through the assistance of the pin pulling screw rod 52. Moreover, in order to prevent the pin shaft from being separated due to the failure of the spring bolt after the arm support pin shaft is installed in place, the tail part of the pin pulling screw rod 52 of the connecting pin shaft is additionally provided with a limiting baffle plate for limiting the pin shaft, so that the pin shaft is protected by the bolt and the limiting baffle plate. However, when the pin pulling operation is performed in the prior art, the limit baffle and the pin shaft have limit contradictions, the limit baffle needs to be disassembled before the pin shaft is pulled out, and the disassembled limit baffle does not have a proper storage place, so that the limit baffle is inconvenient to store and easy to lose.

In view of the above technical problems that the limiting baffle for limiting the pin shaft needs to be disassembled and cannot be stored before the pin shaft is pulled out, as shown in fig. 1 and fig. 2, the present application provides a pin shaft limiting device, the pin shaft includes a pin pulling screw 52 and a pin shaft body 51 inserted in the first connecting piece 30 and the second connecting piece 40, and the pin pulling screw 52 is used for assisting in pulling out the pin shaft body 51, so that the pin shaft body 51 moves at the first position and the second position. Wherein, round pin axle stop device includes first spacing subassembly and the spacing subassembly of second all with first connecting piece 30 fixed connection, and the spacing subassembly of second includes mount pad 21 and can dismantle the second limiting plate 22 of being connected with mount pad 21, pulls out round pin screw rod 52 and runs through second spacing subassembly and second limiting plate 22 along the direction of round pin axle body 51 in proper order.

The pin shaft body 51 can be located at a second position where the first connecting piece 30 and the second connecting piece 40 are completely inserted and a first position where the second connecting piece 40 is not inserted, respectively, when the pin shaft body 51 is located at the second position, as shown in fig. 1, the pin shaft body 51 penetrates through the first connecting piece 30 and the second connecting piece 40, the second limiting plate 22 is connected with the mounting seat 21 and used for abutting against the limiting pin shaft body 51, so that the pin shaft body 51 can be always inserted into the first connecting piece 30 and the second connecting piece 40 to prevent the pin shaft from being disengaged; when round pin axle body 51 is located the first position, as shown in fig. 2, round pin axle body 51 extracts from second connecting piece 40 this moment, second connecting piece 40 and first connecting piece 30 disconnection, second limiting plate 22 breaks away from and presss from both sides with mount pad 21 and locates between round pin axle body 51 and the first spacing subassembly, first spacing subassembly is used for the spacing round pin axle body 51 of butt, so that round pin axle and second limiting plate 22 still can be stayed on first connecting piece 30, need dismantle second limiting plate 22 from overall structure when having avoided extracting the round pin axle, do not have the problem of suitable place of depositing, the risk that round pin axle and second limiting plate 22 lost has been reduced.

In addition, first spacing subassembly includes mounting panel 11 and the first limiting plate 12 of being connected with mounting panel 11 can dismantle, and mounting panel 11 and first connecting piece 30 fixed connection, when round pin axle body 51 was located the first position, first limiting plate 12 was used for the spacing round pin axle body 51 of butt. When the pin shaft needs to be completely detached from the first connecting piece 30, the first limiting plate 12 is detached from the mounting plate 11 only, so that the first limiting plate 12 can be released from the abutting limit of the pin shaft body 51.

In the embodiment of the present invention, the first limiting plate 12 and the second limiting plate 22 are both provided with a through hole 221 coaxial with the pull pin screw 52, the pull pin screw 52 includes a rod head 521 and a rod body 522, the rod head 521 is located the first limiting plate 12 and is far away from one side of the pin body 51, and the rod body 522 sequentially passes through the through hole 221 of the first limiting plate 12 and the second limiting plate 22 and is connected with the pin body 51. Wherein, pull out pin screw 52 and round pin hub connection back both can the simultaneous movement together, the diameter of pole head 521 and round pin axle body 51 all is greater than the diameter of through-hole 221 to when guaranteeing to pull out pin screw 52 and can freely slide on first limiting plate 12 and second limiting plate 22, first limiting plate 12 and second limiting plate 22 are in the position of difference to round pin axle body 51 all have the spacing effect.

In the embodiment of the present invention, when the pin body 51 is switched from the second position in fig. 1 to the first position in fig. 2, the end of the mounting portion touches or abuts against the pin body 51, so that the end of the mounting seat 21 and the peripheral wall of the pin body 51 are spaced apart from each other to prevent the pin from being disengaged.

In addition, because when round pin axle body 51 is in the first position in fig. 2, the axis free rotation of round pin axle can be followed to second limiting plate 22, in order to prevent that second limiting plate 22 from colliding with other objects in the outside, the farthest distance of the axis of round pin axle to the edge of second limiting plate 22 is less than the nearest distance of the axis of round pin axle to the edge of first connecting piece 30, just so can guarantee that free rotation's second limiting plate 22 can't stretch out outside the edge of first connecting piece 30, thereby prevent that second limiting plate 22 from colliding with other objects in the outside, protection second limiting plate 22 does not produce the damage of colliding with.

In the embodiment of the present invention, as shown in fig. 3, the mounting seat 21 includes two ear plates 211 arranged in parallel at intervals, and the second limiting plate 22 is clamped between the two ear plates 211 and fixed by the detachable fastening component 212, wherein the gap between the two ear plates 211 is greater than the thickness of the second limiting plate 22, so that the second limiting plate 22 can be detached by the easier implementation in the mounting seat 21. The mount is not limited to the form having the double lug plate 211, and may be an integrated structure such as a U-shaped block that can sandwich the second stopper plate 22.

Preferably, can dismantle fastening components 212 can be for the round pin axle subassembly, and the operation of inserting and pulling out the round pin axle subassembly is very simple quick, adaptation that can be fine the utility model discloses in often need dismantle the operating condition of second limiting plate 22 fast, but the utility model discloses an application scope is not limited to this, can dismantle fastening components 212 still can be for other fastening connection subassembly such as bolt subassembly.

As shown in fig. 4, the second limiting plate is a plate and is provided with a through hole 221 and a mounting hole 222 for inserting the detachable fastening assembly 212, it should be noted that a limiting sleeve may be added in the through hole 221, so as to facilitate flexible adjustment of the aperture of the through hole 221 when using the pull-pin screws 52 with different diameters, so that the present application has wide applicability.

The embodiment of the utility model provides an in, the parallel interval arrangement of first limiting plate 12 and second limiting plate 22 and the axis of perpendicular to pull out round pin screw rod 52, such design helps making the contact surface of first limiting plate 12 and second limiting plate 22 and round pin axle body 51 level and more smooth, thereby the area of contact surface has been improved, the pressure of contact surface has been reduced, more be favorable to promoting the atress structure of first limiting plate 12 and second limiting plate 22, the risk that first limiting plate 12 and second limiting plate 22 are crushed has effectively been reduced, the life of first limiting plate 12 and second limiting plate 22 has been improved.

It should be noted that, in order to make the pin body 51 located at the first position in fig. 2, the connection with the second connection element 40 can be smoothly released, the distance between the first limiting plate 12 and the second limiting plate 22 is ensured to be greater than the thickness of the second connection element 40, and the moving distance of the pin body 51 is made to be greater than the depth of inserting the pin body into the second connection element 40, so that the pin body 51 can be completely removed from the second connection element 40 to release the limit of the second connection element 40.

The embodiment of the utility model provides an in, still provide a hoist, this hoist includes first cantilever crane, second cantilever crane, round pin axle and as above round pin axle stop device, because this hoist has adopted all embodiments of above-mentioned round pin axle stop device, consequently has the beneficial effect that all embodiments of the aforesaid brought. The first connecting piece 30 is a first arm support, the second connecting piece 40 is a second arm support, the pin shaft is used for connecting the first arm support and the second arm support, the pin shaft limiting device can prevent the pin shaft from being separated in the movement process of the first arm support and the second arm support, the pin shaft and the second limiting plate 22 are still reserved on the first arm support after the pin is pulled out, integral storage and transportation are achieved, and the risk of loss is reduced.

In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

While embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. A pin shaft limiting device comprises a pin pulling screw rod (52) and a pin shaft body (51) which is inserted in a first connecting piece (30) and a second connecting piece (40), wherein the pin pulling screw rod (52) is used for assisting in pulling out the pin shaft body (51) so as to enable the pin shaft body (51) to move in a first position and a second position, and is characterized in that the pin shaft limiting device comprises a first limiting assembly and a second limiting assembly which are fixedly connected with the first connecting piece (30), and the second limiting assembly comprises a mounting seat (21) and a second limiting plate (22) which is detachably connected with the mounting seat (21);

wherein, pull out round pin screw rod (52) along the orientation the direction of round pin axle body (51) runs through in proper order second spacing subassembly and second limiting plate (22) round pin axle body (51) are located during the second position, second limiting plate (22) with mount pad (21) are connected and are used for the butt spacing round pin axle body (51) are located during the first position, second limiting plate (22) with mount pad (21) break away from and press from both sides and locate round pin axle body (51) with between the first spacing subassembly, first spacing subassembly is used for the butt spacing round pin axle body (51).

2. The pin limiting device according to claim 1, wherein the first limiting assembly comprises a mounting plate (11) and a first limiting plate (12) detachably connected to the mounting plate (11), the mounting plate (11) is fixedly connected to the first connecting member (30), and the first limiting plate (12) is used for abutting and limiting the pin body (51) when the pin body (51) is located at the first position.

3. The pin limiting device according to claim 2, wherein the first limiting plate (12) and the second limiting plate (22) are both provided with a through hole (221) coaxial with the pin pulling screw (52), the pin pulling screw (52) comprises a rod head (521) and a rod body (522), the rod head (521) is located on one side of the first limiting plate (12) far away from the pin body (51), and the rod body (522) sequentially penetrates through the through holes (221) in the first limiting plate (12) and the second limiting plate (22) and is connected with the pin body (51).

4. The pin limitation unit according to claim 3, wherein the diameter of the rod head (521) and the pin body (51) are larger than the diameter of the through hole (221).

5. The pin shaft limiting device according to claim 2, wherein the first limiting plate (12) and the second limiting plate (22) are arranged in parallel and spaced apart and perpendicular to the axis of the pin drawing screw (52).

6. Pin limitation device according to claim 2, wherein the distance between the first limitation plate (12) and the second limitation plate (22) is greater than the thickness of the second connection member (40).

7. A pin limitation unit according to any one of claims 1 to 6, wherein the ends of the mounting seat (21) are spaced from the peripheral wall of the pin body (51).

8. The pin limitation device according to any one of claims 1 to 6, wherein the furthest distance from the edge of the second limitation plate (22) to the axis of the pin body is less than the closest distance from the edge of the first connection member (30) to the axis of the pin body.

9. The pin limitation device according to any one of claims 1 to 6, wherein the mounting seat (21) comprises two ear plates (211) arranged in parallel and spaced apart, and the second limitation plate (22) is clamped between the two ear plates (211) and fixed by a detachable fastening assembly (212).

10. A crane is characterized by comprising a first arm support, a second arm support, a pin shaft and the pin shaft limiting device according to any one of claims 1 to 9, wherein the pin shaft is used for connecting the first arm support and the second arm support.

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