Cylindrical one-piece embedded pin for connecting two workpieces and connecting structure of two workpieces

Abstract

The utility model relates to a cylindrical one-piece embedded pin for connecting two workpieces and a connecting structure of the two workpieces, the cylindrical one-piece embedded pin for connecting the two workpieces comprises two cylinders which are parallel to each other, partially intersect and form a whole, and at least one end of each cylinder is provided with a reducing frustum. The cylindrical one-piece embedded pin for connecting the two workpieces has the advantages of being simple in structure, convenient to manufacture and low in cost compared with a connecting piece needing to be linearly cut or sawed into a dovetail tenon shape.

Description

Technical Field

[0001] The utility model relates to the field of mechanical component connection and fastening, in particular to a cylindrical interlocking pin for connecting two workpieces and a connecting structure of the two workpieces. The materials of the two workpieces can be metal, plastic or wood. Background Art

[0002] At present, when two rigid workpieces (which can be made of metal, plastic or wood) need to be fastened together, welding, bolt connection, mortise and tenon connection, etc. are used. In the existing mortise and tenon connection, two integral dovetail-shaped connectors K1 are used to fasten the two rigid workpieces K2 (such as Figure 1 As shown), if the connector and the rigid workpiece are both made of steel, then the dovetail grooves on the connector and the two rigid workpieces need to be processed using wire cutting technology, which takes a long time and has a high cost. In addition, in order for the connector and the dovetail grooves on the two rigid workpieces to be installed and fastened, the connector and the dovetail grooves on the two rigid workpieces are usually processed to an interference fit. In this case, the connector is difficult to insert into the dovetail groove when it is prepared to be inserted, and a file needs to be used to reduce the end, which greatly increases the installation time.

[0003] For example, in the Chinese patent "A dovetail joint structure and joint method for solid wood furniture", publication number CN112160956A, the two workpieces in the patent are made of wood, and both the dovetail groove and the dovetail joint body need to be sawed, which requires a long process and processing time. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the invention of the utility model is to provide a cylindrical one-piece interlocking pin for connecting two workpieces and a connecting structure of the two workpieces. The cylindrical one-piece interlocking pin for connecting the two workpieces and the connecting structure of the two workpieces are reasonably designed and easy to manufacture, install and use.

[0005] The utility model discloses a cylindrical interlocking pin for connecting two workpieces, which is characterized in that it comprises two cylindrical bodies which are parallel to each other and partially intersect to form an integral body, and at least one end of the cylindrical body is provided with a cone with a reduced diameter.

[0006] In one embodiment, the two cylinders have the same diameter and the same height.

[0007] In one embodiment, the diameters of the two cylinders are different, and the heights of the two cylinders are the same.

[0008] In one embodiment, a chamfer is provided at the intersection of the two cylinders.

[0009] In one embodiment, the cylinder is made of a rigid metal material.

[0010] The utility model discloses a method for manufacturing a cylindrical interlocking pin for connecting two workpieces, comprising: 1. forming a profile with a cross section of two intersecting circles by rolling steel; 2. forming a blank by sawing with a cutting machine; and 3. forming a frustum by extruding one end of the cylinder by a cold extrusion process.

[0011] The cylindrical one-piece interlocking pin for connecting two workpieces of the utility model has the advantages of simple structure, convenient manufacture and low cost compared with the connecting piece which needs to be wire cut or sawed into a dovetail tenon shape.

[0012] The utility model provides a connection structure of two workpieces, characterized in that it comprises two rigid workpieces to be fastened together, the contact surfaces of the two rigid workpieces to be fastened together are perpendicular to the upper and lower end surfaces of the two rigid workpieces, holes are drilled on the two rigid workpieces near the contact surfaces and the sides penetrate the contact surfaces, and when the contact surfaces of the two rigid workpieces are close to each other, cylindrical one-piece interlocking pins are embedded in the two holes, the cylindrical one-piece interlocking pins comprise two cylinders that are parallel to each other and partially intersect to form an integral body, at least one end of the cylinder has a tapered cone, and the two cylinders are respectively embedded in the holes.

[0013] In one embodiment, the hole is a through hole penetrating the upper and lower end surfaces of two rigid workpieces, or the hole is a countersunk hole.

[0014] In one embodiment, the diameters of the holes on the two rigid workpieces are the same, the diameters of the two cylinders are the same, and the heights of the two cylinders are the same.

[0015] In one embodiment, the diameters of the holes on the two rigid workpieces are different, the diameters of the two cylinders are different, and the heights of the two cylinders are the same.

[0016] In one embodiment, the holes on the two rigid workpieces are transitionally fitted or interference fit with the cylinder.

[0017] The manufacturing method of the connection structure of two workpieces of the utility model comprises the following steps: 1. drilling holes in the two workpieces respectively near the contact surfaces by means of a drilling machine, and the sides of the holes penetrate the contact surfaces; 2. inserting one end of a cylindrical one-piece interlocking pin having a cone into the two holes first; and 3. using a hammer to hit the upper end surface of the cylindrical one-piece interlocking pin so that the cylindrical one-piece interlocking pin is integrally embedded in the two holes.

[0018] The advantages of the connection structure of two workpieces of the utility model are as follows: 1. The processing of two holes is convenient and fast with low cost; 2. The installation of the cylindrical joint interlocking pin is convenient and fast.

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic cross-sectional structure diagram of an existing embodiment;

[0021] Figure 2 It is a top view of the cylindrical one-piece interlocking pin of the utility model;

[0022] Figure 3 This is a front view of the cylindrical one-piece interlocking pin of the utility model;

[0023] Figure 4 This is a top view dimension diagram of an embodiment of the cylindrical one-piece interlocking pin of the utility model;

[0024] Figure 5 It is a top view of the connection structure of two workpieces of the utility model;

[0025] Figure 6 It is a front view of the connection structure of two workpieces of the utility model;

[0026] Figure 7 It is a top view of the two workpieces to be connected;

[0027] Figure 8 It is a top view of two workpieces connected by a cylindrical one-piece dowel pin. DETAILED DESCRIPTION

[0028] In order to make the above features and advantages of the present invention more obvious and easy to understand, embodiments are given below with reference to the accompanying drawings for detailed description as follows.

[0029] The cylindrical one-piece engaging pin 01 for connecting two workpieces of the utility model comprises two cylinders 1 which are parallel to each other and partially intersect to form an integral body. One end or both ends of the cylinder 1 have a tapered cone 2. The function of the tapered cone 2 is to facilitate the insertion of the end of the engaging pin 01 into the hole A4. If there is no tapered cone 2, it is difficult to insert the end of the engaging pin 01 into the hole A4, which affects the installation efficiency.

[0030] The diameters of the two cylinders may be the same or different, but the best shape is that the cross-sections of the two cylinders are circular (in order to match the circular hole-shaped channels drilled by the drill in the two workpieces, if the cross-section of the cylinder uses other shapes, such as elliptical or dovetail, the channel A4 cannot be made by drilling with a drill, and the manufacturing cost is high and the time is long; in addition, other shapes such as dovetail cannot be made into a frustum by cold extrusion or other machining methods, or the manufacturing cost is high; if the cross-sections of the two cylinders are changed to elliptical and the shape of the channel is circular, although the use requirements can be met, there are gaps between the two, which affects the closure of the channel), the heights of the two cylinders may be the same or different, but it is better that the cylinders have the same diameter, the same height and are flush with each other.

[0031] The intersection of two cylinders 1 means that the two cylinders 1 have a partially overlapping portion (that is, the distance between the axis lines of the two cylinders 1 is less than the sum of the radii of the two cylinders 1), and a chamfer 3 is provided at the intersection of the two cylinders, wherein the cylinders are preferably made of rigid metal material, but may also be other rigid materials.

[0032] The dimensions of the cylindrical interlocking pin in one embodiment are as follows: Figure 4 shown.

[0033] The utility model discloses a method for manufacturing a cylindrical interlocking pin for connecting two workpieces, comprising: 1. forming a profile with a cross section of two intersecting circles by rolling steel; 2. forming a blank by sawing with a cutting machine; and 3. forming a frustum by extruding one end of the cylinder by a cold extrusion process.

[0034] The cylindrical one-piece interlocking pin for connecting two workpieces of the utility model has the advantages of simple structure, convenient manufacture and low cost compared with the connecting piece which needs to be wire cut or sawed into a dovetail tenon shape.

[0035] The utility model discloses a connection structure of two workpieces, comprising two rigid workpieces A1 (which may be made of wood, steel or other materials) to be fastened together, wherein the contact surfaces A2 of the two rigid workpieces A1 to be fastened together are perpendicular to the upper and lower end surfaces A3 of the two rigid workpieces, and holes A4 penetrating the contact surfaces from the sides are drilled on the two rigid workpieces near the contact surfaces, that is, the distance between the axis of the drilled hole A4 and the contact surface is less than the radius of the hole A4, so that a notch A5 is generated on the contact surface due to the drilling, and the hole A4 can be made by a drilling machine or a milling machine, and the hole can be a through hole penetrating the upper and lower end surfaces of the two rigid workpieces, or the hole can be a countersunk hole.

[0036] When the contact surfaces of two rigid workpieces are close to each other, a cylindrical one-piece interlocking pin 01 is embedded in the two channels A4. The cylindrical one-piece interlocking pin 01 includes two cylinders 1 which are parallel to each other and partially intersect to form an integral body. At least one end of the cylinder has a tapered cone 2. The two cylinders are respectively embedded in the channels. The function of the tapered cone 2 is to facilitate the insertion of the end of the interlocking pin 01 into the channel A4. If there is no tapered cone 2, it is difficult to insert the end of the pin 01 into the channel A4, which affects the installation efficiency.

[0037] The two frustums 2 are connected at the side close to each other without being disconnected.

[0038] Specifically, the diameters of the holes on the two rigid workpieces can be the same or different, the diameters of the corresponding two cylinders can be the same or different, the two cylinders have the same height and are flush, the hole and cylinder diameters are comparable, and both can be transition fit or interference fit, but interference fit is preferred, so as to achieve better fastening.

[0039] The manufacturing method of the connection structure of two workpieces of the utility model comprises the following steps: 1. drilling holes in the two workpieces respectively near the contact surfaces by means of a drilling machine, and the sides of the holes penetrate the contact surfaces; 2. inserting one end of a cylindrical one-piece interlocking pin having a cone into the two holes first; and 3. using a hammer to hit the upper end surface of the cylindrical one-piece interlocking pin so that the cylindrical one-piece interlocking pin is integrally embedded in the two holes.

[0040] The advantages of the connection structure of two workpieces of the utility model are as follows: 1. The processing of two holes is convenient and fast with low cost; 2. The installation of the cylindrical joint interlocking pin is convenient and fast.

[0041] Unless otherwise stated, for any technical solution disclosed in the above utility model, if a numerical range is disclosed, then the disclosed numerical range is a preferred numerical range. Any technician in the field should understand that the preferred numerical range is only a numerical value with more obvious technical effects or representative values ​​among many feasible numerical values. Since there are too many numerical values ​​to be exhaustive, the utility model discloses some numerical values ​​to illustrate the technical solution of the utility model, and the above-listed numerical values ​​should not constitute a limitation on the scope of protection of the invention.

[0042] If the words "first", "second" and so on are used in this article to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of description to distinguish the components. Unless otherwise stated, the above words have no special meaning.

[0043] At the same time, if the above-mentioned utility model discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connected by bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except when it is obviously impossible to use an one-piece molding process).

[0044] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in the above utility model include states or shapes that are approximate, similar or close thereto.

[0045] Any component provided by the utility model can be assembled from multiple separate components, or can be a separate component manufactured by an integrated forming process.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

Claims

1. A cylindrical one-piece interlocking pin for connecting two workpieces, characterized in that: The invention comprises two cylindrical bodies which are parallel to each other and partially intersect and form an integral body, and at least one end of the cylindrical body is provided with a frustum with a reduced diameter.

2. The cylindrical interlocking pin for connecting two workpieces according to claim 1, characterized in that: The two cylinders have the same diameter and the same height.

3. The cylindrical interlocking pin for connecting two workpieces according to claim 1, characterized in that: The diameters of the two cylinders are different, but the heights of the two cylinders are the same.

4. The cylindrical one-piece interlocking pin for connecting two workpieces according to claim 1, 2 or 3, characterized in that: The intersection of the two cylinders is provided with a rounded corner.

5. The cylindrical one-piece interlocking pin for connecting two workpieces according to claim 1, characterized in that: The cylinder is made of a rigid metal material.

6. A connection structure of two workpieces, characterized in that: It comprises two rigid workpieces to be fastened together, the contact surfaces of the two rigid workpieces to be fastened together are perpendicular to the upper and lower end surfaces of the two rigid workpieces, holes penetrating the contact surfaces from the sides are drilled on the two rigid workpieces near the contact surfaces, and when the contact surfaces of the two rigid workpieces are close to each other, cylindrical one-piece interlocking pins are embedded in the two holes, the cylindrical one-piece interlocking pins comprise two cylinders which are parallel to each other and partially intersect to form an integral body, at least one end of the cylinder has a cone with a reduced diameter, and the two cylinders are respectively embedded in the holes.

7. The connection structure of two workpieces according to claim 6, characterized in that: The hole is a through hole penetrating the upper and lower end surfaces of two rigid workpieces, or the hole is a countersunk hole.

8. The connection structure of two workpieces according to claim 6 or 7, characterized in that: The diameters of the holes on the two rigid workpieces are the same, the diameters of the two cylinders are the same, and the heights of the two cylinders are the same.

9. The connection structure of two workpieces according to claim 6 or 7, characterized in that: The diameters of the holes on the two rigid workpieces are different, the diameters of the two cylinders are different, and the heights of the two cylinders are the same.

10. The connection structure of two workpieces according to claim 6, characterized in that: The holes on the two rigid workpieces are transitionally fitted or interference fit with the cylinder.

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