CN212106601U - Pin shaft connecting structure - Google Patents
Pin shaft connecting structure Download PDFInfo
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- CN212106601U CN212106601U CN202020446341.2U CN202020446341U CN212106601U CN 212106601 U CN212106601 U CN 212106601U CN 202020446341 U CN202020446341 U CN 202020446341U CN 212106601 U CN212106601 U CN 212106601U
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Abstract
The utility model discloses a pin shaft connecting structure, which comprises a first component, a second component, a shaft sleeve, a ring sleeve and a pin shaft, wherein the first component is provided with a double-lug plate, the double-lug plate is provided with a pin shaft hole, the pin shaft passes through the pin shaft hole to be connected with the first component, the pin shaft is rotationally connected with the first component, the second component is provided with a lug plate, the lug plate is provided with a connecting hole, a joint bearing is arranged in the connecting hole, the pin shaft is connected with the second component by the joint bearing, and the joint bearing is arranged between the double-lug plate of the first component; the ring sleeve is in clearance fit with the pin shaft hole, the ring sleeve is arranged on the outer side of the shaft sleeve, the shaft sleeve is in interference fit with the ring sleeve, and the shaft sleeve is in clearance fit with the pin shaft; by additionally arranging the ring sleeve, the installation operation difficulty is reduced, and the damage risk to related parts in the dismounting and replacing process is reduced; the disassembly, assembly and replacement are convenient, and the maintenance is easy; in normal use, the shaft sleeve only needs to be replaced regularly; when unexpected wear occurs, connection repair can also be achieved by fitting a ring sleeve.
Description
Technical Field
The utility model belongs to blast furnace stokehold equipment field, concretely relates to round pin hub connection structure.
Background
Pin shaft connections are commonly used for the connection between two structural members to meet the requirements of relative rotation between the members, and are also used in the hoisting process of some structural members, and are a detachable connection structure form which is commonly adopted.
The pin shaft connection mode is various, and the commonly adopted connection structural mode is single-shear connection, double-shear connection and multi-lug plate connection. Mostly be the double shear structure that three otic placodes are constituteed in mechanical equipment, this kind of structural style is connected one side otic placode and opposite side otic placode by a round pin axle, can take place relative rotation between round pin axle and the otic placode, and load each other is transmitted through the contact surface of round pin axle and otic placode.
The common pin shaft connecting structure form is as follows:
as shown in fig. 1, a common pin shaft connecting structure adopts a pin shaft connecting structure between a first member and a second member, and adopts a double-shear structure composed of three lug plates, wherein a pin shaft connects a lug plate on one side with a lug plate on the other side, and the pin shaft and the lug plates can rotate relatively; to achieve relative rotation between the components; the pin shaft is in a ladder structure form, is connected with the lug plates (namely the first component 11) at two sides in a way that holes are in direct contact with the shaft and are in clearance fit; the connection of the pin to the middle ear plate (i.e., the second member 12) uses a knuckle bearing configuration.
In the axial direction, the outer ring of the knuckle bearing is positioned by a check ring through a hole in the middle lug plate, one side of the inner ring is positioned by a shaft shoulder of a pin shaft, and the other side of the inner ring is positioned by a spacer bush; the pressing plate is combined with the side face of the lug plate through a bolt, wherein the pressing plate must be pressed by the end face of the pin shaft so as to ensure the positioning and pressing in the axial direction.
As shown in fig. 2, in another common pin shaft connecting structure, a pin shaft connecting structure is adopted between a first member 11 and a second member 12, a double-shear structure composed of three lug plates is adopted, a pin shaft connects a lug plate on one side with a lug plate on the other side, and the pin shaft and the lug plates can rotate relatively; to achieve the relative rotational needs between the components.
The pin shaft is in a stepped structure form, and is connected with lug plates on two sides (namely the first component 11) through a shaft sleeve. The shaft sleeve is in over fit with the lug plate hole, and the shaft sleeve is in clearance fit with the pin shaft; the connection of the pin to the middle ear plate (i.e., the second member 12) uses a knuckle bearing configuration.
In the axial direction, the outer ring of the middle lug plate (namely the second component 12) is positioned by a check ring through a hole in the middle knuckle bearing, one side of the inner ring is positioned by a shaft shoulder of a pin shaft, and the other side of the inner ring is positioned by a second shaft sleeve; the pressing plate is combined with the pin shaft through a bolt, wherein the pressing plate is contacted with the end face of the second shaft sleeve, and a set gap is reserved between the pressing plate and the end face of the pin shaft and between the pressing plate and the lug plate face so as to ensure the positioning and the pressing in the axial direction.
The stokehole cover uncovering machine is heavy mechanical equipment used for operating a first section of a main iron runner cover of a large-scale blast furnace cast house to complete lifting, transverse moving, rotation and other actions, and the weight of the runner cover is generally 20-24 t. Because the lifting load is large, a connecting pin shaft between a lifting component and a driving component needs to bear large radial force and certain axial force, and the conventional common pin shaft connecting structure is easy to cause the following problems under the heavy load condition, namely, 1, the component is easy to damage when being disassembled; 2. the abrasion and deformation of the member body hole are easy to occur after the load; 3. and is not easy to disassemble, maintain and repair after being worn or deformed.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a pin shaft connecting structure, wherein a shaft sleeve and a ring sleeve are arranged at the pin shaft connecting part, and the ring sleeve is additionally arranged, so that the mounting operation difficulty is reduced, the assembly, the disassembly and the replacement are convenient, and the maintenance is easy; in normal use, only the shaft sleeve needs to be replaced regularly.
In order to achieve the above object, the present invention adopts a technical solution in which a pin shaft connection structure includes a first member, a second member, a shaft sleeve, a ring sleeve, and a pin shaft, wherein the first member is provided with a double lug plate, the double lug plate is provided with a pin shaft hole, the pin shaft passes through the pin shaft hole and is connected to the first member, the pin shaft is rotatably connected to the first member, the second member is provided with a lug plate, the lug plate is provided with a connection hole, the connection hole is provided with a joint bearing, the pin shaft is connected to the second member by using the joint bearing, and the joint bearing is disposed between the double lug plates of the first member; the ring sleeve is in clearance fit with the pin shaft hole, the ring sleeve is arranged on the outer side of the shaft sleeve, the shaft sleeve is in interference fit with the ring sleeve, and the shaft sleeve is in clearance fit with the pin shaft.
The hardness of the shaft sleeve is lower than that of the ring sleeve.
The fit clearance between the shaft sleeve and the pin shaft is larger than the fit clearance between the ring sleeve and the pin shaft hole.
The shaft sleeve comprises a first shaft sleeve and a second shaft sleeve, the ring sleeve comprises a first ring sleeve and a second ring sleeve, the first ring sleeve is arranged on the outer side of the first shaft sleeve, and the second ring sleeve is arranged on the outer side of the second shaft sleeve; the pin shaft is of a stepped structure, the pin shaft is provided with three shaft shoulders which are a first shaft shoulder, a second shaft shoulder and a third shaft shoulder respectively, and the first shaft sleeve is axially positioned and compressed by a first ring sleeve and the first shaft shoulder of the pin shaft;
one side of the second component is positioned through a check ring of the outer ring of the joint bearing, one side of the inner ring of the check ring is positioned with the second shaft shoulder of the pin shaft, the other side of the inner ring of the check ring is positioned through a second shaft sleeve, and the distance from the third shaft shoulder to the second shaft shoulder is smaller than or equal to the width of the check ring.
The matching surface of the first shaft sleeve and the first ring sleeve is provided with a positioning step.
The matching surface of the pin shaft hole and the ring sleeve is provided with a step.
The small end of the pin shaft is provided with a pressing plate, the pressing plate is in contact with the end face of the shaft sleeve, and gaps are formed among the pressing plate, the pin shaft and the side faces of the lug plates.
The shaft sleeve is a copper sleeve.
Compared with the prior art, the utility model discloses following beneficial effect has at least: the first component and the second component are connected through a pin shaft so as to meet the requirement of relative rotation between the components; the pin shaft connection between the two components adopts a double-shear structure consisting of three lug plates, the lug plate at one side is connected with the lug plate at the other side by a pin shaft, and the pin shaft and the lug plates can rotate relatively; the pin shaft is connected with the lug plates at two sides by using a structure form of a ring sleeve and a shaft sleeve, wherein the ring sleeve is in clearance fit with the component, the ring sleeve is in interference fit with the shaft sleeve, the shaft sleeve is in clearance fit with the pin shaft, and the fit clearance between the shaft sleeve and the pin shaft is larger than that between the ring sleeve and the component, so that the free rotation between the lug plates and the shaft sleeve is relatively fixed by taking the pin shaft as the center; the connection of the pin shaft and the middle lug plate uses a structural form of a joint bearing; by additionally arranging the ring sleeve, the installation operation difficulty is reduced, and the damage risk to related parts in the dismounting and replacing process is reduced; the disassembly, assembly and replacement are convenient, and the maintenance is easy; in normal use, the shaft sleeve only needs to be replaced regularly; when unexpected wear occurs, connection repair can also be achieved by fitting a ring sleeve.
Furthermore, the pin shaft adopts a stepped shaft form, and the left side and the right side adopt a structural form that shaft shoulders are used for positioning and a pressing plate is fastened by bolts, so that the axial positioning is realized; a gap is formed between the pressing plate and the end face of the pin shaft handle, so that the axial positioning compression is ensured.
Drawings
Fig. 1 is a schematic diagram of a conventional pin connection in the prior art.
Fig. 2 is a schematic diagram of another conventional pin connection structure in the prior art.
Fig. 3 is a schematic diagram of the pin connecting structure of the present invention.
In the attached drawing, 1-a first shaft sleeve, 2-a first ring sleeve, 3-a pin shaft, 4-a second shaft sleeve, 5-a second ring sleeve, 6-a pressing plate, 7-a bolt and 8-a washer.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 3, a pin shaft connection structure includes a first member 11, a second member 12, a shaft sleeve, a ring sleeve and a pin shaft, wherein a double-lug plate is arranged on the first member 11, a pin shaft hole is formed in the lug plate, the pin shaft 3 penetrates through the pin shaft hole and is connected with the first member 11, the pin shaft 3 is rotatably connected with the first member 11, a lug plate is arranged on the second member 12, a connection hole is formed in the lug plate, a joint bearing is arranged in the connection hole, the pin shaft 3 is connected with the second member 12 by using the joint bearing, and the joint bearing is arranged between the double-lug plate of the first member 11; the ring sleeve is in clearance fit with the pin shaft hole, the ring sleeve is arranged on the outer side of the shaft sleeve, the shaft sleeve is in interference fit with the ring sleeve, and the shaft sleeve is in clearance fit with the pin shaft 3.
The hardness of the shaft sleeve is lower than that of the ring sleeve.
The fit clearance between the shaft sleeve and the pin shaft is larger than the fit clearance between the ring sleeve and the component.
The shaft sleeve comprises a first shaft sleeve 1 and a second shaft sleeve 4, the ring sleeve comprises a first ring sleeve 2 and a second ring sleeve 5, the first ring sleeve 2 is arranged on the outer side of the first shaft sleeve 1, and the second ring sleeve 5 is arranged on the outer side of the second shaft sleeve 4; the pin shaft 3 is of a stepped structure, the pin shaft 3 is provided with three shaft shoulders which are a first shaft shoulder, a second shaft shoulder and a third shaft shoulder respectively, and the first shaft sleeve 1 is axially positioned and compressed by the first ring sleeve 2 and the first shaft shoulder of the pin shaft 3;
one side of the second component 12 is positioned through a check ring of the outer ring of the joint bearing, one side of the inner ring of the check ring is positioned with the second shaft shoulder of the pin shaft 3, the other side of the inner ring of the check ring is positioned through the second shaft sleeve 4, and the distance from the third shaft shoulder to the second shaft shoulder is smaller than or equal to the width of the check ring;
the small end of the pin shaft 3 is provided with a pressing plate 6, the pressing plate 6 is in contact with the end face of the shaft sleeve, and gaps are formed among the pressing plate 6, the pin shaft 3 and the side faces of the lug plates.
Specifically, a pin shaft connecting structure is adopted between the first component 11 and the second component 12, a double-shear structure consisting of three lug plates is adopted, one lug plate on one side is connected with the lug plate on the other side by a pin shaft, and the pin shaft and the lug plates can rotate relatively; to achieve the relative rotational needs between the components.
The pin shaft 3 is in a stepped structure form, the pin shaft 3 is provided with three shaft shoulders which are a first shaft shoulder, a second shaft shoulder and a third shaft shoulder respectively, two ends of the pin shaft 3 are connected with lug plates, the middle part of the pin shaft 3 and the second component 12 adopt a joint bearing connection form, wherein the first shaft sleeve 1 and the second shaft sleeve 4 both adopt copper alloy, and the first ring sleeve 2 and the second ring sleeve 5 adopt steel parts; the first ring sleeve 2, the second ring sleeve 5 and the ear plate of the first member 11 are in clearance fit, the ring sleeve and the shaft sleeve are in interference fit, the shaft sleeve and the pin shaft 3 are in clearance fit, and the fit clearance between the shaft sleeve and the pin shaft is larger than the fit clearance between the ring sleeve and the member;
in the axial direction, the ring sleeve is positioned by the left side surface and the right side surface of the ear plates at the two sides, and the first shaft sleeve 1 is axially positioned and compressed by the first ring sleeve 2 and the shaft shoulder of the pin shaft 3; the middle lug plate, namely the second component 12, is positioned by a check ring through a hole by using the outer ring of the joint bearing, one side of the inner ring is positioned by the shaft shoulder of the pin shaft 3, and the other side is positioned by the second shaft sleeve 4; the pressing plate 6 is closed with the pin shaft 3 through a bolt, wherein the pressing plate 6 is in contact with the end face of the second shaft sleeve 4, gaps are formed between the pressing plate 6 and the end face of the pin shaft 3 and the lug plate face to ensure positioning and pressing in the axial direction, the pressing plate 6 and the pin shaft 3 are connected and fastened through a bolt 7, and a gasket 8 is arranged between a nut and the pressing plate 6.
Claims (8)
1. A pin shaft connecting structure is characterized by comprising a first component (11), a second component (12), a shaft sleeve, a ring sleeve and a pin shaft, wherein a double-lug plate is arranged on the first component (11), a pin shaft hole is formed in the double-lug plate, the pin shaft (3) penetrates through the pin shaft hole to be connected with the first component (11), the pin shaft (3) is rotatably connected with the first component (11), a lug plate is arranged on the second component (12), a connecting hole is formed in the lug plate, a joint bearing is arranged in the connecting hole, the pin shaft (3) is connected with the second component (12) through the joint bearing, and the joint bearing is arranged between the double-lug plates of the first component (11); the ring sleeve is in clearance fit with the pin shaft hole, the ring sleeve is arranged on the outer side of the shaft sleeve, the shaft sleeve is in interference fit with the ring sleeve, and the shaft sleeve is in clearance fit with the pin shaft (3).
2. The pin connecting structure according to claim 1, wherein the bushing has a hardness lower than that of the collar.
3. The pin connecting structure according to claim 1, wherein a fitting clearance between the boss and the pin is larger than a fitting clearance between the collar and the pin hole.
4. A pin connection according to claim 1, wherein the bushing comprises a first bushing (1) and a second bushing (4), the collar comprises a first collar (2) and a second collar (5), the first collar (2) is disposed outside the first bushing (1), and the second collar (5) is disposed outside the second bushing (4); the pin shaft (3) is of a stepped structure, the pin shaft (3) is provided with three shaft shoulders which are respectively a first shaft shoulder, a second shaft shoulder and a third shaft shoulder, and the first shaft sleeve (1) is axially positioned and compressed by the first ring sleeve (2) and the first shaft shoulder of the pin shaft (3);
one side of the second component (12) is positioned through a check ring of the outer ring of the joint bearing, one side of the inner ring of the check ring is positioned with the second shaft shoulder of the pin shaft (3), the other side of the inner ring of the check ring is positioned through a second shaft sleeve (4), and the distance from the third shaft shoulder to the second shaft shoulder is smaller than or equal to the width of the check ring.
5. The pin connection structure according to claim 4, wherein a fitting surface of the first sleeve with the first collar is provided with a positioning step.
6. The pin connecting structure according to claim 1, wherein the fitting surfaces of the pin hole and the collar are provided with steps.
7. The pin connecting structure according to claim 1, wherein the small end of the pin (3) is provided with a pressing plate (6), the pressing plate (6) is in contact with the end surface of the shaft sleeve, and gaps are formed among the pressing plate (6), the pin (3) and the side surfaces of the lug plates.
8. The pin connecting structure according to claim 1, wherein the bushing is a copper bushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020446341.2U CN212106601U (en) | 2020-03-31 | 2020-03-31 | Pin shaft connecting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020446341.2U CN212106601U (en) | 2020-03-31 | 2020-03-31 | Pin shaft connecting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212106601U true CN212106601U (en) | 2020-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020446341.2U Active CN212106601U (en) | 2020-03-31 | 2020-03-31 | Pin shaft connecting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212106601U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114635911A (en) * | 2022-03-16 | 2022-06-17 | 江苏徐工工程机械研究院有限公司 | Pin shaft assembly and assembling method thereof and engineering machinery |
-
2020
- 2020-03-31 CN CN202020446341.2U patent/CN212106601U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114635911A (en) * | 2022-03-16 | 2022-06-17 | 江苏徐工工程机械研究院有限公司 | Pin shaft assembly and assembling method thereof and engineering machinery |
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