Floating positioning pin device
By using a floating positioning pin device with multiple elastic elements arranged circumferentially on the positioning pin, the problem of insufficient self-adaptive capability of the positioning pin is solved, enabling precise positioning and stable assembly of different workpieces, and improving assembly efficiency and reliability.
Patent Information
- Application Number
- CN202520163106.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2035-01-23
AI Technical Summary
Existing locating pins lack self-adaptability, cannot adapt to workpieces of different sizes or shapes, and are prone to shifting or falling off after assembly.
A floating positioning pin device is designed. By setting multiple first elastic elements at circumferential intervals on the positioning pin, the positioning pin is made self-adaptive by using elastic restoring force. It can automatically return to the center and adapt to workpieces of different sizes or shapes. The elastic elements absorb impact force and offset, thereby improving assembly stability.
It enables precise positioning of workpieces of different sizes or shapes, reduces vibration and instability during insertion, improves stability and reliability after assembly, and avoids displacement or detachment.
Smart Images
Figure CN223811998U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to positioning pin technical field especially relates to a floating positioning pin device. BACKGROUND
[0002] This part provides only background information related to the present disclosure, which is not necessarily prior art.
[0003] In the mechanical processing process, the mechanical hand grabs the piece, and the piece is placed, and the workpiece is processed, and the workpiece needs to be in the accurate position, the positioning pin cooperates with the positioning hole and is the commonly used auxiliary positioning device, and the positioning pin is inserted into the positioning hole for positioning.
[0004] At present, the positioning pin needs to be accurately aligned with the workpiece during assembly, the positioning pin lacks self-adaptive ability, cannot be applied to workpieces of different sizes, shapes or tolerance ranges, and is easy to deviate or fall off after assembly due to external force or workpiece tolerance. UTILITY MODEL CONTENT
[0005] The utility model discloses a floating positioning pin device, comprising:
[0006] The utility model discloses a floating positioning pin device, comprising:
[0007] The assembly body is provided with an assembly cavity.
[0008] The positioning pin comprises a base arranged in the assembly cavity and a pin body, the pin body is connected to the base along the axial direction of the base, and the pin body is used for assembling with the workpiece.
[0009] A plurality of first elastic members are located in the assembly cavity, and the plurality of first elastic members are connected with the base and are arranged at intervals along the circumference of the base.
[0010] The floating positioning pin device of the utility model has the advantages that the plurality of first elastic members are arranged at intervals in the circumferential direction of the positioning pin, the elastic restoring force of the first elastic member enables the positioning pin to have self-adaptive ability, can adapt to workpieces of different sizes or shapes, and can automatically return to the center when deviated, thereby ensuring accurate positioning of the workpiece.
[0011] In addition, the floating positioning pin device according to the utility model can also have the following additional technical features:
[0012] In some embodiments of the utility model, the assembly cavity includes installation cavity and first positioning cavity, the installation cavity extends along the axial direction of the assembly body, the base is arranged at the bottom of the installation cavity, the first positioning cavity is arranged at the lower part of the installation cavity along the circumferential direction of the assembly cavity, and multiple first elastic members are arranged in the first positioning cavity.
[0013] In some embodiments of the utility model, multiple first positioning cavities are arranged, and multiple first elastic members are arranged one by one in the multiple first positioning cavities.
[0014] In some embodiments of the utility model, the first elastic member includes a first spring and a first connecting sleeve, one end of the first connecting sleeve is connected with the base, and the first spring is arranged in the first connecting sleeve.
[0015] In some embodiments of the utility model, the length of the first spring is arranged along the radial direction of the positioning pin.
[0016] In some embodiments of the utility model, the floating positioning pin device is further provided with a second elastic member, the assembly cavity further includes a second positioning cavity, the second positioning cavity is arranged at the bottom of the first positioning cavity along the axial direction of the assembly body, and the second elastic member is arranged in the second positioning cavity.
[0017] In some embodiments of the utility model, the second elastic member includes a second spring and a second connecting sleeve, one end of the second connecting sleeve is connected with the base, and the second spring is arranged in the second connecting sleeve.
[0018] In some embodiments of the utility model, the cross section shape of the base is a regular hexagon, and one first elastic member is arranged on each face corresponding to each side.
[0019] In some embodiments of the utility model, the pin body is provided with an assembly chamfer at the end away from the base.
[0020] In some embodiments of the utility model, the floating positioning pin device further includes a detection structure, the detection structure includes an airtight detection hole arranged on the assembly body, and the airtight detection hole is arranged along the length direction of the assembly body. BRIEF DESCRIPTION OF DRAWINGS
[0021] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of preferred embodiments, and are not meant to limit the present utility model. Moreover, the same reference numerals in the drawings indicate the same or similar elements. In the drawings:
[0022] Figure 1 A structure schematic view of the floating positioning pin device according to the embodiment of the present application is shown schematically;
[0023] Figure 2 A sectional view of the floating positioning pin device according to the embodiment of the present application is shown schematically; Figure One ;
[0024] Figure 3 A sectional view of the floating positioning pin device according to the embodiment of the present application is shown schematically; Figure Two ;
[0025] Figure 4 A partial structure schematic view of the floating positioning pin device according to the embodiment of the present application is shown schematically.
[0026] The reference signs are as follows:
[0027] 1, assembly; 11, assembly cavity; 111, mounting cavity; 112, first positioning cavity; 113, second positioning cavity;
[0028] 2, positioning pin; 21, base; 22, pin body; 221, assembly chamfer;
[0029] 3, first elastic member; 31, first spring; 32, first connecting sleeve;
[0030] 4, second elastic member; 41, second spring; 42, second connecting sleeve;
[0031] 5, workpiece;
[0032] 6, detection structure; 61, airtight detection hole. DETAILED DESCRIPTION
[0033] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly and completely conveyed to those skilled in the art, and the scope of the present disclosure can be accurately conveyed to those skilled in the art.
[0034] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described unless specifically identified as an order dependent step. It is also to be understood that additional or alternative steps can be employed.
[0035] Although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
[0036] Spatially relative terms, such as "inner", "outer", "inward", "outward", "lower", "bottom", "top", "upper", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms can be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
[0037] During the machining, assembling and movement process, the positioning pin can be inserted into the hole in the assembled part to accurately position and fix the position of the assembled part, prevent it from moving or rotating, significantly improve the assembly efficiency of the product, reduce the rate of defective products caused by incorrect positioning, and ensure the accuracy and stability of mechanical parts.
[0038] In the related art, the positioning pin needs to be precisely aligned with the workpiece during assembly, the positioning pin lacks self-adaptive ability, cannot be applied to workpieces of different sizes, shapes or tolerance ranges, and is prone to deviation or falling off after assembly due to external force or workpiece tolerance.
[0039] Therefore, the floating positioning pin device is provided to adapt to workpieces of different sizes or shapes and automatically return to the center when deviated, thereby ensuring accurate positioning of the workpiece and improving the positioning stability and reliability of the workpiece after insertion, so as to solve the above technical problems.
[0040] As shown in Figures 1 to 4 According to the embodiment of the utility model, a floating positioning pin device is provided, which comprises an assembly body 1, a positioning pin 2 and a plurality of first elastic members 3.
[0041] The assembly body 1 is provided with an assembly cavity 11, which is arranged along the axial direction of the assembly body 1, and the cross-sectional shape of the assembly cavity 11 is adapted to the cross-sectional shape of the base 21, so that the base 21 can be installed in the assembly cavity 11 and located at the bottom of the assembly cavity 11.
[0042] The positioning pin 2 comprises a base 21 arranged in the assembly cavity 11 and a pin body 22, the base 21 is arranged at the bottom of the pin body 22, the pin body 22 is connected to the base 21 along the axial direction of the base 21, and the pin body 22 is used for assembly with the workpiece 5. In this embodiment, the workpiece 5 is an engine cylinder head. During assembly, the positioning pin 2 is used to limit the position of the workpiece 5, and the pin body 22 is inserted into the hole position on the cylinder head to ensure the position fixing and accurate alignment of the cylinder head during machining or assembly.
[0043] The plurality of first elastic members 3 are located in the assembly cavity 11, and each of the plurality of first elastic members 3 is connected with the base 21 and arranged in the circumferential direction of the base 21, and the spacing between the adjacent two first elastic members 3 is the same, so that the positioning pin 2 can be balanced in multiple directions and the position stability is maintained.
[0044] The floating positioning pin device of the utility model has the plurality of first elastic members 3 arranged in the circumferential direction of the positioning pin 2, the elastic restoring force of the first elastic member 3 enables the positioning pin 2 to have self-adaptive ability, so that the positioning pin 2 can be automatically adjusted according to the insertion angle or position of the workpiece 5, can automatically return to the center when deviated, realizes accurate positioning of the workpiece 5, adapts to different sizes or position deviations, thereby being applicable to workpieces 5 of different sizes or shapes, and has strong applicability. Meanwhile, the first elastic member 3 can absorb the impact force and deviation amount during installation of the workpiece 5, reduce the vibration or instability during insertion of the workpiece 5, improve the positioning stability and reliability of the workpiece 5 after insertion, and avoid deviation or falling off due to external force or workpiece tolerance.
[0045] In some embodiments of the present application, the assembly cavity 11 comprises a mounting cavity 111 and a first positioning cavity 112, the mounting cavity 111 is arranged in the assembly body 1 along the axial direction of the assembly body 1, the base 21 is arranged at the bottom of the mounting cavity 111, and the first positioning cavity 112 is arranged at the lower part of the mounting cavity 111 along the circumferential direction of the assembly cavity 11, and a plurality of first elastic members 3 are arranged in the first positioning cavity 112.
[0046] Specifically, in the present embodiment, a plurality of first positioning cavities 112 are arranged, the plurality of first positioning cavities 112 are arranged at the lower part of the mounting cavity 111 and are arranged at intervals along the circumferential direction of the assembly cavity 11, the plurality of first positioning cavities 112 are arranged one by one corresponding to the plurality of first elastic members 3, the first elastic members 3 are arranged in the first positioning cavities 112, the first positioning cavities 112 fix the first elastic members 3, the first elastic members 3 move along the axial direction thereof, the cross-sectional shape of each first positioning cavity 112 is matched with the cross-sectional shape of the first elastic member 3, the first elastic member 3 is conveniently arranged in the first positioning cavity 112, and meanwhile the first elastic member 3 does not move circumferentially, thereby ensuring the stability and reliability of the positioning pin device.
[0047] By arranging a plurality of first elastic members 3, the elastic restoring force of the first elastic members 3 replaces the rigid positioning, the friction and impact between the pin body 22 of the positioning pin 2 and the workpiece 5 are greatly reduced, the service life of the equipment is effectively prolonged, the durability and reusability of the device are improved, and the device is suitable for industrial scenes of repeated operation.
[0048] In some embodiments of the present application, the cross-sectional shape of the base 21 is a regular hexagon, and one first elastic member 3 is arranged on each face where each side of the base 21 is located. By arranging the base 21 as a regular hexagon and arranging six first elastic members 3 on the base 21, one first elastic member 3 is arranged on each face where each side of the base 21 is located, so that the six first elastic members 3 are uniformly distributed on the six faces of the base 21, the positioning pin 2 can be balanced in six directions, each first elastic member 3 can provide elastic support and restoring force when the positioning pin 2 is subjected to external force or deviation, and the positioning pin 2 can always be kept centered under the action of the first elastic member 3, thereby keeping the stability of the position of the positioning pin 2. The above structure can make the positioning pin 2 move flexibly in multiple directions, adapt to the small deviation or insertion force change of the workpiece 5, and thus realize the automatic centering and balancing of the positioning pin 2.
[0049] In other embodiments, the cross-sectional shape of the base 21 can also be a square, a regular pentagon, a regular octagon, etc. It can be understood that the more the number of sides of the base 21 is, the more the first elastic members 3 arranged along the circumferential direction of the positioning pin 2 are, and thus the self-adaptability of the positioning pin 2 is stronger, the positioning pin 2 can be automatically adjusted according to the insertion angle or position of the workpiece 5, and the accurate positioning of the workpiece 5 is improved.
[0050] In some embodiments of the utility model, the one end of pin body 22 away from base 21 is provided with assembly chamfer 221.
[0051] Specifically, the one end of pin body 22 away from base 21 is the head of positioning pin 2, when assembling, the head is inserted into workpiece 5 to position, assembly chamfer 221 is arranged on the head of positioning pin 2, that is, the slope of the head of positioning pin 2 is designed, assembly chamfer 221 can guide workpiece 5 to enter the correct position, reduce artificial alignment error, guide workpiece 5 to be more easily assembled with positioning pin 2, so that workpiece 5 can easily enter positioning pin 2 without high-precision alignment during insertion, when assembling, only need to insert workpiece 5 roughly, positioning pin 2 is automatically adjusted under the action of first elastic member 3, realize the rapid alignment of workpiece 5, improve the alignment efficiency, and significantly reduce the requirement for the installation precision of workpiece 5.
[0052] In some embodiments of the utility model, first elastic member 3 includes first spring 31 and first connecting sleeve 32, one end of first connecting sleeve 32 is connected with base 21, and first spring 31 is arranged in first connecting sleeve 32.
[0053] Specifically, the number of first connecting sleeve 32 is matched with the number of first spring 31, in the embodiment, the number of first spring 31 sleeve and first spring 31 is six, first connecting sleeve 32 is hollow cylindrical structure, first connecting sleeve 32 is provided with first end and second end along the axial direction thereof, the first end and the second end are oppositely arranged, the first end is connected with base 21, and the length of first connecting sleeve 32 is arranged along the radial direction of positioning pin 2, first spring 31 is installed in first connecting sleeve 32, the inner diameter of first connecting sleeve 32 is slightly larger than the outer diameter of first spring 31, so that first spring 31 can be installed in first connecting sleeve 32, meanwhile, first spring 31 is prevented from being taken out of first connecting sleeve 32, the stability of first spring 31 installation is improved, so that the stability and reliability of positioning pin device during assembly are ensured.
[0054] In some embodiments of the utility model, the floating positioning pin device is further provided with second elastic member 4, and assembly cavity 11 further includes second positioning cavity 113, second positioning cavity 113 is arranged at the bottom of first positioning cavity 112 along the axial direction of assembly body 1, and second elastic member 4 is arranged in second positioning cavity 113.
[0055] Specifically, the second positioning cavity 113 is arranged at the bottom of the first positioning cavity 112, the first positioning cavity 112 and the second positioning cavity 113 are a stepped hole, the first positioning cavity 112 has a large hole diameter, the second positioning cavity 113 has a small hole diameter, the lower end of the base 21 is located in the large hole diameter of the stepped hole, and the lower end of the base 21 can abut against the step of the stepped hole. The second elastic member 4 is arranged in the second positioning cavity 113. By arranging the second elastic member 4, the elastic force of the second elastic member 4 can buffer the positioning pin 2 when the positioning pin device is used, thereby reducing the friction and impact between the positioning pin 2 and the workpiece 5, effectively prolonging the service life of the equipment, improving the durability and reusability of the device, and being suitable for industrial scenes that are repeatedly operated many times. In addition, the second elastic member 4 can absorb the impact force and offset amount when the workpiece 5 is installed, reduce the vibration or instability when the workpiece 5 is inserted, and improve the positioning stability and reliability of the workpiece 5 after being inserted.
[0056] In some embodiments of the utility model, the second elastic member 4 includes a second spring 41 and a second connecting sleeve 42, one end of the second connecting sleeve 42 is connected with the base 21, and the second spring 41 is arranged in the second connecting sleeve 42.
[0057] Specifically, the second connecting sleeve 42 is a hollow cylindrical structure, the second connecting sleeve 42 has a first end and a second end along the axial direction thereof, the first end and the second end are oppositely arranged, the first end is connected with the bottom end of the base 21, the second spring 41 is installed in the second connecting sleeve 42, the inner diameter of the second connecting sleeve 42 is slightly larger than the outer diameter of the second spring 41, the second spring 41 can be installed in the second connecting sleeve 42, and the second spring 41 is prevented from being taken out of the second connecting sleeve 42, the stability of the second spring 41 is improved, and therefore the stability and reliability of the positioning pin device during assembly are ensured.
[0058] In some embodiments of the utility model, the floating positioning pin device further includes a detection structure 6, the detection structure 6 is arranged on the assembly body 1, the detection structure 6 includes a gas-tight detection hole 61 arranged on the assembly body 1, the gas-tight detection hole 61 is arranged along the length direction of the assembly body 1, the gas-tight detection hole 61 can detect whether the workpiece 5 is aligned with the hole of the clamp body, and the gas-tight detection hole 61 is used in cooperation with the air leakage detection device.
[0059] When the positioning pin device is used, when the positioning hole of the workpiece 5 is correctly aligned with the pin body 22 of the positioning pin 2, and the pin body 22 is inserted into the positioning hole of the workpiece 5, at this time, the end face of the workpiece 5 is attached to the end face of the assembly body 1, and the air-tight detection hole 61 is blocked at the end close to the workpiece, so that the installation is in place, and the air leakage detection device cannot detect air leakage; if the positioning hole of the workpiece 5 is not correctly aligned with the positioning pin 2 or there is deviation (not installed in place), the air leakage detection device can sense air leakage, so as to judge whether the positioning of the workpiece 5 is correct. By arranging the air-tight detection hole 61, the gas leakage condition can be sensed, the accuracy of the positioning of the workpiece 5 is automatically recognized, and the precision and reliability in the operation process are ensured.
[0060] In order to further understand the floating positioning pin device of the embodiment, the working process of the floating positioning pin device of the embodiment will be described below in combination with the drawings:
[0061] When the floating positioning pin 2 is used, first, the workpiece 5 is roughly aligned with the positioning pin 2, and the positioning hole of the workpiece 5 is guided to be aligned with the positioning pin 2 through the assembly chamfer 221 of the head of the positioning pin 2. Then, the workpiece 5 is moved downward and gradually inserted into the positioning pin 2, and gently shaking the assembly body 1 can help the workpiece 5 to be positioned smoothly.
[0062] When the floating positioning pin device of the embodiment is used, the operator only needs to roughly clamp the workpiece 5 into the positioning pin, and under the action of the first elastic member 3, the positioning pin 2 can automatically adjust and pull the workpiece into the correct position. This self-adaptive structure effectively simplifies the assembly process and improves the efficiency of the assembly operation. In addition, under the action of the first elastic member 3, the positioning pin 2 automatically adjusts to restore the balance, ensures that the workpiece 5 is accurately centered, realizes stable assembly positioning, and at the same time, the first elastic member 3 can absorb the impact force and deviation amount of the workpiece 5 during installation, reduces the vibration or instability of the workpiece 5 during insertion, improves the positioning stability and reliability of the workpiece 5 after insertion, and avoids deviation or falling caused by external force or workpiece tolerance.
[0063] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A floating dowel device, characterized in that, The application relates to a floating positioning pin device. The floating positioning pin device comprises an assembly body provided with an assembly cavity; a positioning pin comprising a base arranged in the assembly cavity and a pin body connected to the base along the axial direction of the base, the pin body being used for assembly with a workpiece; a plurality of first elastic members arranged in the assembly cavity, the first elastic members being connected to the base and being arranged in the circumferential direction of the base. The assembly cavity comprises a mounting cavity and a first positioning cavity, the mounting cavity extending along the axial direction of the assembly body, the base being arranged at the bottom of the mounting cavity, the first positioning cavity being arranged at the lower part of the mounting cavity along the circumferential direction of the assembly cavity, and the first elastic members being arranged in the first positioning cavity. The first positioning cavity is arranged in plurality, and the first positioning cavities and the first elastic members are arranged one by one.
2. The floating dowel apparatus of claim 1, wherein, The first elastic member comprises a first spring and a first connecting sleeve, one end of the first connecting sleeve being connected to the base, and the first spring being arranged in the first connecting sleeve.
3. The floating dowel apparatus of claim 2, wherein, The length of the first spring is arranged along the radial direction of the positioning pin.
4. The floating dowel apparatus of claim 1, wherein, The floating positioning pin device is further provided with a second elastic member, the assembly cavity further comprises a second positioning cavity, the second positioning cavity being arranged at the bottom of the first positioning cavity along the axial direction of the assembly body, and the second elastic member being arranged in the second positioning cavity.
5. The floating dowel apparatus of claim 4, wherein, The second elastic member comprises a second spring and a second connecting sleeve, one end of the second connecting sleeve being connected to the base, and the second spring being arranged in the second connecting sleeve.
6. The floating dowel apparatus of claim 2, wherein, The cross section of the base is a regular hexagon, and one first elastic member is arranged on each face of the base.
7. The floating dowel apparatus of claim 6, wherein, The pin body is provided with an assembly chamfer at the end away from the base.
8. The floating dowel apparatus of any one of claims 1 to 7, wherein, The floating positioning pin device further comprises a detection structure, the detection structure comprising airtight detection holes arranged on the assembly body, the airtight detection holes being arranged along the length direction of the assembly body.
9. The floating dowel apparatus of any one of claims 1 to 7, wherein, 10. The floating dowel apparatus of any one of claims 1 to 7, wherein,