CN216241722U

CN216241722U - Eccentric pin shaft

Info

Publication number: CN216241722U
Application number: CN202122898163.4U
Authority: CN
Inventors: 王镇铭
Original assignee: Jiangyin Machine Building Co ltd
Current assignee: Jiangyin Machine Building Co ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-04-08
Anticipated expiration: 2031-11-24

Abstract

The utility model relates to an eccentric pin shaft which comprises a pin shaft main body and a pin shaft sleeve, wherein the pin shaft main body comprises a first main body and a second main body, the diameter of the first main body is larger than that of the second main body, the second main body is used for being matched with a mounting hole of a second workpiece, and the center of the second main body is not concentric with that of the first main body; the pin shaft sleeve is sleeved outside the first main body, the pin shaft sleeve is provided with an inner circle and an outer circle, the center of the inner circle is not concentric with the center of the outer circle, the center of the outer circle is not concentric with the center of the first main body, the center of the outer circle is concentric with the center of the second main body, the center of the inner circle is not concentric with the center of the second main body and is concentric with the center of the first main body, and the pin shaft sleeve and the first main body are matched with the mounting hole of the first workpiece. The eccentric pin shaft provided by the utility model can be easily and conveniently inserted into the mounting holes of the two workpieces, and the two parts of the first workpiece and the second workpiece are easier to reinforce; the universality is good, the processability is good, the installation requirement is low, and the method is more stable and reliable.

Description

Eccentric pin shaft

Technical Field

The utility model relates to an eccentric pin shaft.

Background

The traditional pin shaft is used when the first workpiece is connected with the second workpiece, the traditional pin shaft 6 needs to be matched with the first workpiece and the second workpiece when being assembled and fastened, the first workpiece and the second workpiece are provided with corresponding taper pin holes, and the two taper pin holes need to be completely overlapped to fasten the pin shaft in the first workpiece and the second workpiece. The working principle is as follows: the first workpiece and the second workpiece are connected through the pin shaft, so that the matching between the two parts can be reinforced, and the first workpiece and the second workpiece are integrally integrated. The disadvantages are that: the conventional processing method is that the first workpiece and the second workpiece are matched together and then matched with each other to form the taper pin hole, so that the processing equipment is strict, if the first workpiece and the second workpiece are large in size and are not easy to be matched with each other to form the taper pin hole, the taper pin holes are required to be formed in the first workpiece and the second workpiece respectively, but the positions of the holes in the first workpiece and the second workpiece are easy to deviate, the deviation of the two holes is required to be accurate to about 0.05 mm by using the conventional pin shaft, and the processing requirement on the taper pin holes is high.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides an eccentric pin shaft, which adopts the following technical scheme:

an eccentric pin shaft is used for fixedly connecting a first workpiece and a second workpiece, corresponding mounting holes are formed in the first workpiece and the second workpiece, the eccentric pin shaft comprises a pin shaft main body and a pin shaft sleeve, the pin shaft main body comprises a first main body and a second main body, the diameter of the first main body is larger than that of the second main body, the second main body is arranged below the first main body, the second main body is used for being matched with the mounting holes of the second workpiece, and the center of the second main body is not concentric with that of the first main body; the round pin axle sleeve establish first main part outside, the round pin axle sleeve circle and excircle have, the center of interior circle with the center decentraction of excircle, the center of excircle with the center decentraction of first main part, the center of excircle with the center of second main part concentric, the center of interior circle with the center decentraction of second main part and with the center of first main part concentric, round pin axle sleeve, first main part be used for with the mounting hole cooperation of first work piece.

Preferably, the first main body is provided with a first hole, the first hole is used for being matched with an installation tool to screw the pin shaft main body into the installation holes of the first workpiece and the second workpiece, and the center of the first hole is concentric with the center of the first main body.

Preferably, the first hole has a polygonal cross section.

Preferably, the first main body is further provided with a second hole, the second hole is positioned below the first hole and communicated with the first hole, the second hole is concentric with the first hole, and the second hole is used for being matched with a lifting tool to screw the pin shaft main body out of the mounting holes on the first workpiece and the second workpiece.

Preferably, the second hole is internally provided with a thread.

Preferably, the second hole is circular or polygonal.

Preferably, the length of the pin bush is greater than that of the first main body, and when the eccentric pin shaft is installed in the installation hole of the first workpiece and the second workpiece, the upper surface of the pin bush is higher than that of the first main body.

Preferably, the distance between the center of the first body and the center of the second body is 0.05-2 mm.

Preferably, the pin shaft main body and the pin shaft sleeve are both made of metal materials.

Preferably, the pin boss is detachably connected to the pin body.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

according to the eccentric pin shaft provided by the utility model, the eccentric pin shaft main body and the eccentric pin shaft sleeve are arranged, so that two workpieces can be quickly and fixedly connected, when the mounting holes on the first workpiece and the second workpiece have position deviation, the eccentric pin shaft can be easily and conveniently inserted into the mounting holes, and the two parts of the first workpiece and the second workpiece are easier to reinforce; the mounting and dismounting are more convenient, the requirement on the machining precision of the mounting holes on the two workpieces is reduced, and the requirement on the assembly of the two workpieces can be met; the universality is good, the processability is good, the installation requirement is low, and the method is more stable and reliable.

Drawings

FIG. 1 is a perspective view of an eccentric pin shaft according to the present invention;

FIG. 2 is a half-sectional view of an eccentric pin shaft according to the present invention;

FIG. 3 is a cross-sectional view of an eccentric pin shaft according to the present invention;

FIG. 4 is a top view of an eccentric pin shaft according to the present invention;

FIG. 5 is a cross-sectional view of the eccentric pin shaft of the present invention installed in the first and second workpiece mounting holes;

fig. 6 is a cross-sectional view of a conventional pin shaft installed in the first and second workpiece mounting holes.

In the above drawings: 1-first body, 11-first hole, 12-second hole, 2-second body, 3-pin bush, 4-first piece, 5-second piece, 6-existing pin.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 5, the eccentric pin is used for connecting a first workpiece 4 and a second workpiece 5, and the first workpiece 4 and the second workpiece 5 are provided with corresponding mounting holes. The eccentric pin shaft comprises a pin shaft main body and a pin shaft sleeve 3.

The structure of the pin shaft main body is as follows: the novel hinge pin comprises a first main body 1 and a second main body 2, wherein the first main body 1 and the second main body 2 are both cylinders, the first main body 1 is used for being matched with a mounting hole of a first workpiece 4, the diameter of the first main body 1 is larger than that of the second main body 2, the second main body 2 is arranged below the first main body 1, the second main body 2 is used for being matched with the mounting hole of a second workpiece 5, the center (indicated by c in figure 3) of the second main body 2 is not concentric with the center (indicated by b in figure 3) of the first main body 1, the hinge pin is of an eccentric structure, when the novel hinge pin is used, the second workpiece 5 extends into the mounting hole of the second workpiece 5, the center of the second main body 2 is concentric with the center of the mounting hole of the second workpiece 5, and the first main body 1 is located in the mounting hole of the first workpiece 4.

The sum of the diameters of the excircle of the first main body 1 and the excircle of the pin shaft sleeve 3 is consistent with the aperture of the mounting hole on the first workpiece 4, and the diameters have certain tolerance. The diameter of the outer circle of the second body 2 is consistent with the diameter of the mounting hole on the second workpiece 5, and the diameter and the mounting hole have certain tolerance.

The center of the first body 1 is not concentric with the center of the second body 2, that is, there is a distance between the center of the first body 1 and the center of the second body 2, and the distance between the center of the first body 1 and the center of the second body 2 is 0.05-2mm (see the distance indicated by a in fig. 3, 4 and 5), and preferably 1mm, and the distance can also be set according to the displacement deviation of the mounting holes on the first and

second workpieces

4 and 5.

The first main body 1 is provided with a first hole 11, the first hole 11 is used for being matched with an installation tool (an inner hexagonal wrench) so as to screw the pin shaft main body into the installation holes in the first workpiece 4 and the second workpiece 5, and the center of the first hole 11 is concentric with the center of the first main body 1 and is not concentric with the center of the second main body 2. First hole 11 cross-section is the polygon, like the hexagon, and mounting tool is interior hexagonal spanner, puts into the mounting hole of first work piece 4, second work piece 5 with the round pin axle main part during the installation after, puts interior hexagonal spanner in first hole 11 of first main part 1 and rotates round pin axle main part through operating the spanner again, can reach second main part 2 from locking and directly fasten with second work piece 5, rotate like clockwise rotation. If the installation tool has another shape, the cross section of the first hole 11 may be configured to match the shape of the installation tool.

The first main body 1 is further provided with a second hole 12, the second hole 12 is located below the first hole 11 and communicated with the first hole 11, the second hole 12 is concentric with the first hole 11, and the second hole 12 is used for being matched with a lifting tool to enable the pin shaft main body to be screwed out of mounting holes in the first workpiece 4 and the second workpiece 5. When the eccentric pin shaft needs to be taken out, a hexagon socket wrench is placed in the first hole 11 of the first main body 1 to rotate the pin shaft main body (the rotating direction is opposite to the placing rotating direction) so that the pin shaft main body is loosened, then a fastener is placed in the second hole 12, and then the fastener is lifted by a lifting tool so that the pin shaft main body can be taken out from the mounting hole. The second hole 12 is provided with an internal thread so that a screw is screwed into the second hole 12, and an upper portion of the screw has a structure such as a ring or a hook for facilitating lifting so that the screw is lifted by a lifting tool engaged with the ring or the hook of the screw.

The second hole 12 has a circular or polygonal shape and is provided according to the structure of the fastener.

The pin bush 3 has the following structure: the pin shaft sleeve 3 is sleeved outside the first main body 1, and the pin shaft is in a hollow cylindrical shape. The pin shaft sleeve 3 is provided with an inner circle and an outer circle, the center of the inner circle of the pin shaft sleeve 3 is not concentric with the center of the outer circle, when the pin shaft sleeve 3 is sleeved outside the first main body 1, the inner circle surface of the pin shaft sleeve 3 is attached to the outer circle surface of the first main body 1, and the diameter of the inner circle of the pin shaft sleeve 3 is close to or equal to the diameter of the outer circle of the first main body 1; the center of the excircle is not concentric with the center of the first main body 1, the center of the excircle is concentric with the center of the second main body 2, the center of the inner circle is not concentric with the center of the second main body 2 and concentric with the center of the first main body 1, and the pin shaft sleeve 3 and the first main body 1 are matched with a mounting hole of the first workpiece 4.

The pin shaft is of an eccentric structure, namely the thickness of the space (inner wall) between the outer circle and the inner circle of the pin shaft is uneven, and the pin shaft can be thick and thin at the same time.

The length of the pin shaft sleeve 3 is greater than that of the first main body 1, when the eccentric pin shaft is installed in the installation holes in the first workpiece 4 and the second workpiece 5, the upper surface of the pin shaft sleeve 3 is higher than that of the first main body 1, and the lower surface of the pin shaft sleeve 3 is flush with the lower surface of the first main body 1, namely, a step hole is formed between the pin shaft sleeve 3 and the first main body 1, so that the installation is facilitated.

The pin shaft sleeve 3 and the pin shaft main body are both of eccentric structures, the pin shaft is of an inner eccentric type and an outer eccentric type, the eccentric pin shaft sleeve 3 is matched with the eccentric pin shaft, the adjustable range is enlarged, the position error of the mounting holes in the first workpiece and the second workpiece 5 is allowed to be enlarged, and the pin shaft main body can be locked after being rotationally tightened in the mounting holes of the first workpiece 4 and the second workpiece 5. Because the pin shaft is of an internal and external eccentric type, when the mounting holes in the first workpiece 4 and the second workpiece 5 have position deviation, the deviation can be digested to better fasten the first workpiece 4 and the second workpiece 5, excessive size deviation is not required to be considered, the pin shaft can be easily and conveniently inserted into the mounting holes, and two parts of the first workpiece 4 and the second workpiece 5 can be easily reinforced.

The pin shaft main body and the pin shaft sleeve 3 are made of metal materials and have certain strength, such as alloy, iron and other materials.

The specific embodiment of fixedly connecting the first workpiece 4 and the second workpiece 5 by using the eccentric pin shaft of the present application is as follows: the pin shaft sleeve 3 is firstly placed in the mounting hole of the first workpiece 4, then the pin shaft main body is placed in the mounting holes of the first workpiece 4 and the second workpiece 5, then the mounting tool is used for rotating the pin shaft main body to achieve the fastening effect, and at the moment, the pin shaft sleeve 3 is tightly attached to the first main body 1. When the eccentric pin shaft is to be taken out, the mounting tool is firstly used for rotating the pin shaft main body to loosen the pin shaft main body, then the fastening fastener is mounted in the hole of the first main body 1, the pin shaft main body is taken out through the lifting tool, the pin shaft sleeve 3 is still left in the mounting hole of the first workpiece 4, and the eccentric pin shaft is easy to take out without much labor during taking out.

During specific operation, if left and right position deviations (such as large left deviation distance) exist on the same horizontal plane in the mounting holes of the first workpiece 4 and the second workpiece 5, when the eccentric pin shaft is mounted, the part with the larger thickness of the pin shaft sleeve 3 corresponds to the left, the part with the smaller thickness of the pin shaft sleeve 3 corresponds to the right, and then the pin shaft main body is placed; if the front and rear position deviations (if the front deviation distance is large) exist on the same horizontal plane in the mounting holes of the first workpiece 4 and the second workpiece 5, when the eccentric pin shaft is mounted, the part with the larger thickness of the pin shaft sleeve 3 corresponds to the front part, the part with the smaller thickness of the pin shaft sleeve 3 corresponds to the rear part, and then the pin shaft main body is placed.

The pin shaft main body is detachably connected with the pin shaft sleeve 3, namely, the pin shaft sleeve 3 and the pin shaft main body can be attached and separated.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. An eccentric pin shaft is used for fixedly connecting a first workpiece and a second workpiece, and corresponding mounting holes are formed in the first workpiece and the second workpiece; the round pin axle sleeve establish first main part outside, the round pin axle sleeve circle and excircle have, the center of interior circle with the center decentraction of excircle, the center of excircle with the center decentraction of first main part, the center of excircle with the center of second main part concentric, the center of interior circle with the center decentraction of second main part and with the center of first main part concentric, round pin axle sleeve, first main part be used for with the mounting hole cooperation of first work piece.

2. The eccentric pin shaft according to claim 1, wherein the first body defines a first hole, the first hole adapted to cooperate with an installation tool to screw the pin shaft body into the mounting holes of the first and second workpieces, the first hole having a center concentric with the center of the first body.

3. The eccentric pin shaft of claim 2, wherein said first bore has a polygonal cross-section.

4. The eccentric pin shaft according to claim 2, wherein the first body further comprises a second hole, the second hole is disposed below the first hole and communicated with the first hole, the second hole is concentric with the first hole, and the second hole is used for cooperating with a pulling tool to unscrew the pin shaft body from the mounting holes of the first and second workpieces.

5. The eccentric pin shaft of claim 4, wherein said second bore is internally threaded.

6. The eccentric pin shaft of claim 4, wherein said second hole is circular or polygonal.

7. The kingpin axis of claim 1, wherein the pin bushing has a length greater than a length of the first body, wherein an upper surface of the pin bushing is higher than an upper surface of the first body when the kingpin is installed in the mounting hole of the first and second workpieces.

8. The eccentric pin shaft according to claim 1, wherein the distance between the center of the first body and the center of the second body is 0.05-2 mm.

9. The eccentric pin shaft according to claim 1, wherein the pin shaft body and the pin shaft sleeve are made of metal.

10. The eccentric pin shaft of claim 1, wherein said pin boss is removably connected to said pin shaft body.