Locating pin convenient to disassemble and assemble

Abstract

The utility model mainly relates to the technical field of positioning pins, in particular to a positioning pin convenient to disassemble and assemble, which comprises two pin bushes which are axially distributed, and the two pin bushes are connected through a telescopic mechanism and used for adjusting the distance between the two pin bushes. A plurality of movable plates which are uniformly distributed in the circumferential direction are arranged in the two pin sleeves, a plurality of positioning columns which are uniformly distributed and horizontally extend are fixedly arranged on the outer sides of the movable plates, the positioning columns are in sliding connection with through grooves formed in the pin sleeves, and driving mechanisms are in transmission connection with the inner sides of the movable plates and used for driving the movable plates to move in the pin sleeves in the radial direction; and the positioning column slides in the through groove. After the two pin bushes are inserted into hole sites of a workpiece, the positioning columns can be driven by the driving mechanism to slide in the through grooves and extend to the outer sides of the pin bushes until the ends of the positioning columns abut against the inner walls of the hole sites, positioning can be achieved, the pin bushes can be detached in the same way, the device is simple and rapid, damage to the device and the workpiece cannot be caused, and the repeated service life is long.

Description

TECHNICAL FIELD

[0001] The utility model mainly relates to the technical field of positioning pin, specifically relates to a positioning pin convenient to dismount. BACKGROUND

[0002] As a basic positioning element in the field of mechanical manufacturing, positioning pins are widely used in the assembly positioning and fastening connection of various workpieces. Traditional positioning pins (such as cylindrical pins, conical pins, etc.) mainly adopt the principle of interference fit, and the pin body is forcibly embedded into the hole by means of external force hammering, so as to realize locking through friction.

[0003] The existing technology has the following significant defects: (1) the installation process needs to rely on a hammer and other tools to knock repeatedly, which is not only time-consuming and laborious, but also easy to cause deformation and damage of the end of the pin body, and in severe cases, it may cause the collapse of the workpiece hole, affecting the assembly accuracy; (2) the disassembly operation is more difficult, and often needs to be implemented by a destructive pulling out with a pin puller, which causes irreversible damage to the pin body and the matching hole, greatly limiting the number of repeated uses; (3) in the assembly scene with limited space, it is difficult to apply effective knocking force, resulting in a significant increase in installation failure rate; (4) the frequent impact operation has the safety hazard of tool slipping and hurting people, which does not meet the safety production requirements of modern mechanical assembly. Therefore, it is urgent to develop a new positioning structure without impact installation and capable of achieving non-destructive and rapid disassembly. CONTENT OF THE UTILITY MODEL

[0004] 1. The technical problem to be solved by the utility model:

[0005] The utility model provides a positioning pin convenient to dismount to solve the technical problems in the background art.

[0006] 2. Technical scheme:

[0007] In order to achieve the above purpose, the utility model provides a technical scheme: a positioning pin convenient to dismount, comprising two pin sleeves distributed in the axial direction, the two pin sleeves are connected through a telescopic mechanism, and the spacing between the two pin sleeves is adjusted;

[0008] A plurality of movable plates are uniformly distributed in the circumferential direction in each of the two pin sleeves, a plurality of uniformly distributed and horizontally extending positioning columns are fixedly arranged on the outer side of the movable plate, the positioning column is slidingly connected with the through slot formed on the pin sleeve, and a driving mechanism is drivingly connected to the inner side of the movable plate for driving the movable plate to radially displace in the pin sleeve, so that the positioning column slides in the through slot.

[0009] Further, the driving mechanism comprises a movable sleeve driven to move in the axial direction of the pin sleeve, a plurality of groups of connecting rods are hingedly connected to the outer side of the movable sleeve, and the other end of each group of connecting rods is hingedly connected to the inner side of each movable plate.

[0010] Further, the movable sleeve is externally provided with a plurality of uniformly distributed guide slides, the guide slides are in sliding connection with vertical sliding rails fixed on the inner wall of the pin sleeve, coaxial lead screws are rotatably installed in the pin sleeve, and the lead screws are in threaded connection with the movable sleeve.

[0011] Further, one end of one of the lead screws is provided with an axially extending sliding groove, and the corresponding end of the other lead screw is fixedly connected with a guide slide column, and the guide slide column is in axial sliding fit with the sliding groove.

[0012] Further, the other end of one of the lead screws extends to the outer end of the pin sleeve, and a handle is fixedly arranged at the outer end of the handle, a cross screw slot is formed in the outer end of the handle, and anti-skid protrusions are uniformly arranged around the outer periphery of the handle.

[0013] Further, the radius of the handle is greater than the radius of the pin sleeve.

[0014] Further, the telescopic mechanism comprises a first connecting sleeve and a second connecting sleeve fixedly arranged at the opposite ends of the two pin sleeves respectively, the second connecting sleeve is sleeved on the first connecting sleeve, a plurality of threaded holes are uniformly arranged in the middle part of the side wall of the second connecting sleeve, and a positioning screw is matched and installed in each threaded hole.

[0015] 3. Beneficial effects:

[0016] Compared with the prior art, the technical scheme has the following beneficial effects: after the two pin sleeves are inserted into the hole position of the workpiece, the movable plate is driven to displace radially outward in the pin sleeve by the driving mechanism, the positioning column is driven to slide in the through groove and extend to the outer side of the pin sleeve, and the positioning is realized until the end portion abuts against the inner wall of the hole position. Similarly, the positioning column can be disassembled, which is not only simple and fast, but also does not cause damage to the device and the workpiece, can be repeatedly used for a long service life, and the distance between the two pin sleeves can be adjusted by the telescopic mechanism, so that the overall length is adjusted, and the hole position of different depths on the workpiece can be positioned. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the shaft side structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the front cross-section structure of the utility model;

[0019] Figure 3 It is an exploded structure schematic diagram of the driving mechanism of the utility model;

[0020] Figure 4 It is an exploded structure schematic diagram of the two lead screws of the utility model;

[0021] Figure 5 It is a telescopic mechanism structure schematic diagram of the utility model.

[0022] Reference signs:

[0023] 1, pin sleeve; 11, through slot; 2, telescopic mechanism; 21, first connecting sleeve; 22, second connecting sleeve; 221, threaded hole; 23, positioning screw; 3, movable plate; 4, positioning column; 5, driving mechanism; 51, movable sleeve; 52, connecting rod; 53, guide slide plate; 54, vertical slide rail; 55, screw rod; 551, sliding groove; 552, guide slide column; 56, handle; 561, cross screw groove; 562, anti-skid convex rib. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings, in which several embodiments of the present application are given. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0025] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0026] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0027] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing", "provided with" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. EMBODIMENT

[0028] See attached document Figures 1-5 A positioning pin that is easy to assemble and disassemble includes two pin sleeves 1 distributed axially, and the two pin sleeves 1 are connected by a telescopic mechanism 2 for adjusting the distance between them.

[0029] Both of the pin sleeves 1 are provided with a plurality of movable plates 3 evenly distributed in the circumferential direction. A plurality of evenly distributed and horizontally extending positioning posts 4 are fixed on the outer side of the movable plates 3. The positioning posts 4 are slidably connected to the through grooves 11 opened on the pin sleeves 1. The inner side of the movable plates 3 is driven by a driving mechanism 5, which is used to drive the movable plates 3 to move radially within the pin sleeves 1 so that the positioning posts 4 slide within the through grooves 11.

[0030] In this embodiment, after the two pin sleeves 1 are inserted into the holes of the workpiece, the driving mechanism 5 drives the movable plate 3 to move radially outward within the pin sleeve 1, thereby driving the positioning pin 4 to slide within the through groove 11 and extend to the outside of the pin sleeve 1 until its end abuts against the inner wall of the hole to achieve positioning. Similarly, it can be disassembled, which is not only simple and quick, but also will not cause damage to the device and the workpiece. It has a long service life and can be reused. Furthermore, the distance between the two pin sleeves 1 can be adjusted by the telescopic mechanism 2, thereby adjusting the overall length, which can be used to limit holes of different depths on the workpiece.

[0031] The driving mechanism 5 includes a movable sleeve 51 that is driven to move axially in the pin sleeve 1. Multiple sets of connecting rods 52 are hinged to the outside of the movable sleeve 51, and the other end of each set of connecting rods 52 is hinged to the inside of each movable plate 3.

[0032] Multiple evenly distributed guide plates 53 are fixed on the outer side of the movable sleeve 51. The guide plates 53 are slidably connected to the vertical slide rail 54 fixed on the inner wall of the pin sleeve 1. A coaxially distributed lead screw 55 is also rotatably installed inside the pin sleeve 1. The lead screw 55 is threadedly connected to the movable sleeve 51.

[0033] In this embodiment, after the lead screw 55 is driven to rotate, it can drive the movable sleeve 51 to move axially within the pin sleeve 1 by means of its threaded connection with the movable sleeve 51 and the sliding connection between the guide plate 53 and the vertical slide rail 54. In addition, with the pulling of multiple sets of connecting rods 52, the movable plate 3 can be driven to move radially within the pin sleeve 1.

[0034] One of the lead screws 55 has an axially extending groove 551 at one end, and the other lead screw 55 has a guide pin 552 fixedly connected to the corresponding end. The guide pin 552 and the groove 551 form an axial sliding fit.

[0035] In the embodiment, the guide sliding column 552 is in sliding fit with the axis of the sliding groove 551, so that the two lead screws 55 can rotate synchronously, and when the telescopic mechanism 2 adjusts the distance between the two pin sleeves 1, the two lead screws 55 can keep synchronous adjustment and keep synchronous rotation.

[0036] One end of the lead screw 55 extends to the outer end of the pin sleeve 1, and a handle 56 is fixedly arranged at the other end of the lead screw 55, and a cross screw groove 561 is arranged at the outer end of the handle 56, and anti-skid convex ribs 562 are arranged around the outer periphery of the handle 56.

[0037] In the embodiment, the handle 56 can be held to rotate and drive the two lead screws 55 to rotate synchronously, and the anti-skid convex ribs 562 can prevent the handle 56 from slipping, and when the rotating resistance is large, the lead screw 55 can be further rotated by a screwdriver matched with the cross screw groove 561, and the handle 56 has a larger radius than the pin sleeve 1, so that the handle 56 can be limited.

[0038] The telescopic mechanism 2 comprises a first connecting sleeve 21 and a second connecting sleeve 22 fixedly arranged at the opposite ends of the two pin sleeves 1 respectively, the second connecting sleeve 22 is sleeved on the first connecting sleeve 21, and a plurality of thread holes 221 are arranged on the side wall of the second connecting sleeve 22, and a positioning screw 23 is matched and arranged in each thread hole 221.

[0039] In the embodiment, after the second connecting sleeve 22 and the first connecting sleeve 21 are relatively slid, the positioning screw 23 is tightened to abut against the outer wall of the first connecting sleeve 21, so that the second connecting sleeve 22 can be locked at the current position, and the same is applicable to other positions, so that the distance between the two pin sleeves 1 can be adjusted.

[0040] The above-described embodiments only express certain embodiments of the utility model, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the utility model patent; it should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model; therefore, the protection scope of the utility model patent should be subject to the appended claims.

[0041] It should be noted that the above content belongs to the technical cognition of the inventor, and since the technical content in the art is vast and complex, the above content of the present application does not necessarily constitute the prior art.

Claims

1. A positioning pin for facilitating assembly and disassembly, characterized in that: The application relates to a telescopic mechanism for adjusting the distance between two pin sleeves (1) which are axially distributed. A plurality of movable plates (3) are uniformly distributed in the circumferences of the two pin sleeves (1), and a plurality of positioning columns (4) are uniformly distributed on the outer sides of the movable plates (3) and horizontally extend, the positioning columns (4) are slidably connected with through grooves (11) formed in the pin sleeves (1), and a driving mechanism (5) is connected with the inner sides of the movable plates (3) and drives the movable plates (3) to radially displace in the pin sleeves (1) so that the positioning columns (4) slide in the through grooves (11).

2. The positioning pin of claim 1, wherein: The driving mechanism (5) comprises a movable sleeve (51) which is driven to axially move in the pin sleeve (1), a plurality of groups of connecting rods (52) are hingedly connected with the outer side of the movable sleeve (51), and the other ends of the connecting rods (52) in each group are respectively hingedly connected with the inner sides of the movable plates (3).

3. The positioning pin of claim 2, wherein: A plurality of uniformly distributed guide sliding plates (53) are fixedly arranged on the outer side of the movable sleeve (51), the guide sliding plates (53) are slidably connected with vertical sliding rails (54) fixedly arranged on the inner wall of the pin sleeve (1), coaxially distributed lead screws (55) are rotatably arranged in the pin sleeve (1), and the lead screws (55) are threadedly connected with the movable sleeve (51).

4. The positioning pin of claim 3, wherein: One end of one of the lead screws (55) is provided with an axially extending sliding groove (551), and the corresponding end of the other lead screw (55) is fixedly connected with a guide sliding column (552), the guide sliding column (552) is axially slidably connected with the sliding groove (551).

5. The positioning pin of claim 4, wherein: The other end of one of the lead screws (55) extends to the outer end of the pin sleeve (1) and is fixedly provided with a handle (56), a cross screw groove (561) is formed in the outer end of the handle (56), and a plurality of anti-skid convex ribs (562) are arranged on the outer periphery of the handle (56).

6. The positioning pin of claim 5, wherein: The radius of the handle (56) is greater than the radius of the pin sleeve (1).

7. The positioning pin of claim 1, wherein: The telescopic mechanism (2) comprises a first connecting sleeve (21) and a second connecting sleeve (22) which are fixedly arranged at the opposite ends of the two pin sleeves (1), the second connecting sleeve (22) is sleeved on the first connecting sleeve (21), a plurality of thread holes (221) are uniformly arranged in the middle of the side wall of the second connecting sleeve (22), and a positioning screw (23) is matched arranged in each thread hole (221).

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