Detection bolt for auxiliary positioning of center of threaded hole

Abstract

The invention provides a detection bolt for auxiliary positioning of the center of a threaded hole, and belongs to the technical field of mechanical part detection. The n stages of telescopic assemblies are sequentially arranged from the first stage to the nth stage from outside to inside, each stage of structure of each telescopic assembly comprises a screw rod and a sliding block, and each sliding block is fixed to one end of the corresponding screw rod; a first-stage structure is arranged in the cylindrical shell, the ith-stage structure is contained in a through hole formed in the (i-1) th-stage structure in the axial direction, and i ranges from 2 to n; the locking mechanisms are respectively arranged between the end part of the cylindrical shell and the sliding block of the first-stage structure and between the inner wall of the through hole of the (i-1) th-stage structure and the sliding block of the ith-stage structure; the locking mechanism is configured to lock the relative position of the sliding block on the extending-out screw and the containing cavity when any stage of screw axially extends out of the containing cavity by a preset length. According to the processing scheme, the application range of bolt detection is widened, and the management cost of workpieces is saved.

Description

Technical Field

[0001] This application relates to the field of mechanical part inspection, and particularly to a detection bolt for auxiliary positioning of the center of a threaded hole. Background Art

[0002] With the increasing quality requirements of components in the mechanical processing process, single-headed bolts are widely used in the detection process of the positional relationship of threaded holes of components. Currently, the detection of component hole positions mostly relies on a coordinate measuring machine. However, for accurate measurement results, threading is not performed on the components immediately after the hole positions are processed. Instead, after the coordinate measuring machine has measured all the hole position relationships of the components to be measured and confirmed that the dimensions are qualified, manual threading is carried out. However, in some special cases, such as in-process sampling inspection, product troubleshooting, reverse design, etc., the threading process of the component hole positions has been completed. At this time, if directly measured with a coordinate measuring machine, the probe will land on the threaded surface to take points, resulting in deformed measured hole positions and affecting the accurate determination of the threaded hole positions.

[0003] The applicant's research found that: Currently, the common method for measuring components with threaded holes is to use a single-headed bolt for auxiliary detection. That is, a single-headed bolt of a suitable size is paired according to the size of the threaded hole, and the threaded end of the single-headed bolt is screwed into the threaded hole, and then the coordinate measuring machine is used to measure the smooth end of the single-headed bolt to indirectly measure the hole position relationship of the component.

[0004] However, traditional single-headed bolts can only achieve one-to-one paired detection. Since the specifications of the threaded holes of components are different, it is required to pair corresponding single-headed bolts of different specifications for the threaded holes of different components on-site. This will not only reduce the production efficiency of components, but also greatly increase the management cost and manufacturing cost of single-headed bolts. Summary of the Invention

[0005] In view of this, this application provides a detection bolt for auxiliary positioning of the center of a threaded hole, which solves the problems in the prior art, improves the applicable range of the detection bolt, and saves the management cost of workpieces.

[0006] The detection bolt for auxiliary positioning of the center of a threaded hole provided by this application adopts the following technical solutions:

[0007] A detection bolt for auxiliary positioning of the center of a threaded hole, comprising:

[0008] A cylindrical outer shell;

[0009] An n-stage sleeved telescopic component, from the outside to the inside are the first to the nth stage. Each stage structure of the telescopic component includes a screw rod and a sliding block, and the sliding block is fixed at one end of the screw rod;

[0010] A first-stage structure is provided inside the cylindrical outer shell. The i-th stage structure is accommodated in a through hole axially opened in the upper edge of the (i - 1)-th stage structure, where i = 2 to n;

[0011] Multiple sets of locking mechanisms are respectively arranged between the end of the cylindrical outer shell and the sliding block of the first-stage structure, and between the inner wall of the through hole of the (i - 1)-th stage structure and the sliding block of the i-th stage structure;

[0012] The locking mechanism is configured to: when any stage of the screw axially extends out of the accommodation cavity by a preset length, lock the relative position of the sliding block on the extended screw and the accommodation cavity.

[0013] Optionally, inwardly protruding guide rails are provided on the inner wall of the cylindrical outer shell and the inner wall of the through hole. The guide rails extend along the length direction of the cylindrical outer shell, and guide grooves cooperating with the guide rails are provided on the sliding block.

[0014] Optionally, limiting rings surrounding the outer circumference of the screw are provided on the inner wall of the cylindrical outer shell and the inner wall of the through hole. After the screw extends out of the cylindrical shell or the through hole by a preset length, the end face of the sliding block abuts against the limiting ring.

[0015] Optionally, there are two guide rails.

[0016] Optionally, a receiving channel is provided at the bottom of the guide groove. A spring, a steel ball, and a retaining ring are sequentially provided in the receiving channel from the inside to the outside. The retaining ring is fixed on one side of the receiving channel far from the inner wall of the through hole. The spring is in a compressed state. The inner diameter of the retaining ring is smaller than the outer diameter of the steel ball, and one end of the steel ball far from the spring protrudes from the retaining ring. A card slot cooperating with the steel ball is provided on the inner walls of the cylindrical outer shell and the through hole near the limiting ring.

[0017] Optionally, the inner circle of the cylindrical outer shell, the through hole, and the outer peripheral side wall of the sliding block are circular.

[0018] Optionally, n is equal to 3.

[0019] Optionally, evenly distributed punching points are provided on the end face of each sliding block facing away from the screw, so that the outer peripheral side wall of the sliding block undergoes radial plastic deformation, and the sliding block with plastic deformation abuts against the inner wall of the through hole or the cylindrical outer shell.

[0020] In summary, the present application includes the following beneficial technical effects:

[0021] The threaded hole center auxiliary positioning and detecting bolt proposed in this application can be applicable to the paired positioning of the centers of threaded holes of various specifications, has general applicability in the detection process of the positional relationship of threaded holes in components, and can be compatible with the threaded holes of various components. This positioning and detecting bolt is composed of multiple single-headed bolts of different specifications. The single-headed bolts can maintain rapid and stable reciprocating sliding through the guiding grooves, which can effectively improve the switching rate of bolts of various different specifications, thus realizing efficient detection. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions of the embodiments of this application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 Schematic diagram of the overlapping multi-stage telescopic structure of the detecting bolt of this application;

[0024] Figure 2 Schematic diagram of the bolt extending in the primary structure of the detecting bolt of this application;

[0025] Figure 3 Explosion structure schematic diagram of the detecting bolt of this application;

[0026] Figure 4 Schematic diagram of the split structure of the adjacent connection structure of this application;

[0027] Figure 5 Schematic diagram of the installation positions of the spring, steel ball and retaining ring of this application;

[0028] Figure 6 Schematic diagram of the spring, steel ball and retaining ring of this application.

[0029] Explanation of the reference numerals: 1, cylindrical outer shell; 2, screw rod; 3, sliding block; 4, through hole; 5, guide rail; 6, guiding groove; 7, limiting ring; 8, accommodating channel; 9, spring; 10, steel ball; 11, retaining ring; 12, clamping groove; 13, punching point. Detailed Embodiments

[0030] The embodiments of this application will be described in detail below with reference to the drawings.

[0031] The following describes the implementation manners of the present application through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope protected by the present application.

[0032] It should be noted that the following describes various aspects of the embodiments within the scope of the appended claims. It should be obvious that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is illustrative only. Based on the present application, those skilled in the art should understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using other structures and / or functionality in addition to one or more of the aspects described herein.

[0033] It should also be noted that the diagrams provided in the following embodiments only schematically illustrate the basic concept of the present application. The diagrams only show the components related to the present application, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in its actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0034] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0035] An embodiment of the present application provides a detection bolt for auxiliary positioning of the center of a threaded hole.

[0036] As Figures 1 to 3 shown, a detection bolt for auxiliary positioning of the center of a threaded hole includes:

[0037] A cylindrical outer shell 1.

[0038] The telescopic component with n - level sleeves, from outside to inside, is the first to the nth level. The structure of each level of the telescopic component includes a screw rod 2 and a sliding block 3, and the sliding block 3 is fixed at one end of the screw rod 2. The first - level structure is arranged inside the cylindrical outer shell 1, and the ith - level structure is accommodated in the through - hole 4 axially opened on the (i - 1)th - level structure, where i = 2 to n, and the axial direction is the length direction of the cylindrical outer shell 1. The sliding block 3 of the first - level structure slides along the length direction of the cylindrical outer shell 1 inside the cylindrical outer shell 1, and the sliding block 3 of the ith - level structure slides along the length direction of the cylindrical outer shell 1 in the through - hole 4 of the (i - 1)th - level structure.

[0039] Multiple sets of locking mechanisms are respectively arranged between the end of the cylindrical outer shell 1 and the sliding block 3 of the first - level structure, and between the inner wall of the through - hole 4 of the (i - 1)th - level structure and the sliding block 3 of the ith - level structure. The locking mechanism is configured to: when the screw rod 2 of any level axially extends a preset length out of the accommodation cavity, lock the relative position of the sliding block 3 on the extended screw rod 2 of this level and the accommodation cavity. Specifically, the locking mechanism between the end of the cylindrical outer shell 1 and the sliding block 3 of the first - level structure is used to: lock the position of the sliding block 3 of the first - level structure relative to the cylindrical outer shell 1 after the screw rod 2 of the first - level structure extends a preset length out of the cylindrical outer shell 1; the locking mechanism between the inner wall of the through - hole 4 of the (i - 1)th - level structure and the sliding block 3 of the ith - level structure is used to: lock the position of the sliding block 3 of the ith - level structure and the screw rod 2 of the (i - 1)th - level structure after the screw rod 2 of the ith - level structure extends a preset length out of the through - hole 4 of the (i - 1)th - level structure.

[0040] In the embodiment of the present application, n is equal to 3. In other embodiments, n can be valued according to actual needs.

[0041] The inner circle of the cylindrical outer shell 1, the through - hole 4, and the outer peripheral side wall of the sliding block 3 are circular. The cylindrical outer shell 1, the through - hole 4, and the sliding block 3 have concentric circular cross - sections, and the roundness tolerance does not exceed IT7 level. The outer diameter of the sliding block 3 on the same - level structure is larger than the outer diameter of the screw rod 2.

[0042] As Figure 4 shown, on the inner wall of the cylindrical outer shell 1 and the inner wall of the through - hole 4, there are inward - protruding guide rails 5 extending along the length direction of the cylindrical outer shell 1, and on the sliding block 3, there are guide grooves 6 cooperating with the guide rails 5. The arrangement of the guide rails 5 and the guide grooves 6 stabilizes the telescopic sliding stability of each - level structure. Both the guide rails 5 and the guide grooves 6 are provided with two.

[0043] As Figure 4 and Figure 5 shown, on the inner wall of the cylindrical outer shell 1 and the inner wall of the through - hole 4, there are limit rings 7 surrounding the outer periphery of the screw rod 2. After the screw rod 2 extends a preset length out of the cylindrical shell or the through - hole 4, the end faces of the sliding block 3 and the limit rings 7 are in contact. The inner diameter of the limit ring 7 is smaller than the outer diameter of the sliding block 3 and larger than the outer diameter of the screw rod 2.

[0044] As Figures 4 to 6 shown, a receiving channel 8 is provided at the bottom of the guide groove 6. The length direction of the receiving channel 8 is arranged along the radial direction. The receiving channel 8 is successively provided with a spring 9, a steel ball 10, and a retaining ring 11 from the inside to the outside. The retaining ring 11 is fixed on one side of the receiving channel 8 away from the inner wall of the through hole 4. The spring 9 is in a compressed state. The inner diameter of the retaining ring 11 is smaller than the outer diameter of the steel ball 10, and the end of the steel ball 10 away from the spring 9 protrudes from the retaining ring 11. A clamping groove 12 that cooperates with the steel ball 10 is provided at one end of the inner walls of the cylindrical outer shell 1 and the through hole 4 close to the limiting ring 7. In the embodiment of the present application, the spring 9, the steel ball 10, the retaining ring 11, and the clamping groove 12 in the receiving channel 8 are combined to form a locking mechanism. Each guide groove 6 is provided with a receiving channel 8.

[0045] Each end face of the sliding block 3 facing away from the screw 2 is evenly punched with points 13, so that the outer peripheral side wall of the sliding block 3 undergoes radial plastic deformation. The sliding block 3 with plastic deformation abuts against the inner wall of the through hole 4 or the cylindrical outer shell 1, which is used to prevent the single-headed bolts of each level of structure from separating from each other during use. When in use, when a person applies pressure to the sliding block 3, the sliding block 3 can be separated from the through hole 4 or the sliding block 3 can be separated from the cylindrical shell. In the embodiment of the present application, the depth of the punching point 13 is 0.3-0.8 mm and the punching angle is 45-60°.

[0046] When in use, when a certain level of screw 2 is needed, pressure is applied to the sliding block 3 of this level of structure and each level of structure inside this level of structure at the same time, so that the screw 2 of this level of structure and the screw 2 of each level of structure inside this level of structure protrude at the same time. At this time, only the screw 2 of this level of structure is exposed, and the screw 2 inside this level of structure is in a hidden state. Under the limiting action of the guide rail 5 and the guide groove 6, by rotating the cylindrical outer shell 1, the screw 2 of this level of structure can be driven to rotate so as to be screwed into the threaded hole of the component to be measured.

[0047] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application 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 detection bolt for auxiliary positioning of the center of a threaded hole, characterized in that: include: A cylindrical housing (1); An n-stage telescopic assembly is sleeved, the first to n-th stages are arranged from the outside to the inside, each stage of the telescopic assembly comprises a screw rod (2) and a sliding block (3), and the sliding block (3) is fixed to one end of the screw rod (2); The cylindrical housing (1) is provided with a first-level structure, and the i-th-level structure is accommodated in a through hole (4) opened along the axial direction on the i-1-th-level structure, where i=2 to n; A plurality of locking mechanisms are respectively arranged between the end of the cylindrical shell (1) and the sliding block (3) of the first-level structure, and between the inner wall of the through hole (4) of the (i-1)-level structure and the sliding block (3) of the (i)-level structure; The locking mechanism is configured to lock the relative position of the sliding block (3) on the extended screw rod (2) and the accommodating cavity when any one-stage screw rod (2) axially extends out of the accommodating cavity by a preset length.

2. The detection bolt for auxiliary positioning of the threaded hole center according to claim 1, characterized in that: An inwardly protruding guide rail (5) is provided on the inner wall of the cylindrical shell (1) and the inner wall of the through hole (4), and the guide rail (5) extends along the length direction of the cylindrical shell (1). The sliding block (3) is provided with a guide groove (6) that cooperates with the guide rail (5).

3. The detection bolt for auxiliary positioning of the threaded hole center according to claim 2, characterized in that: A limiting ring (7) surrounding the outer circumference of the screw rod (2) is provided on the inner wall of the cylindrical shell (1) and the inner wall of the through hole (4). After the screw rod (2) extends out of the cylindrical shell or the through hole (4) by a preset length, the end faces of the sliding block (3) and the limiting ring (7) abut against each other.

4. The detection bolt for auxiliary positioning of the threaded hole center according to claim 2, characterized in that: The guide rails (5) are provided with two.

5. The detection bolt for auxiliary positioning of the threaded hole center according to claim 3, characterized in that: The bottom of the guide groove (6) is provided with an accommodating channel (8), and the accommodating channel (8) is provided with a spring (9), a steel ball (10) and a retaining ring (11) in sequence from the inside to the outside. The retaining ring (11) is fixed on a side of the accommodating channel (8) away from the inner wall of the through hole (4). The spring (9) is in a compressed state. The inner diameter of the retaining ring (11) is smaller than the outer diameter of the steel ball (10), and one end of the steel ball (10) away from the spring (9) protrudes from the retaining ring (11). The inner wall of the cylindrical shell (1) and the through hole (4) is provided with a clamping groove (12) matched with the steel ball (10) at one end close to the limiting ring (7).

6. The detection bolt for auxiliary positioning of the threaded hole center according to claim 1, characterized in that: The inner ring of the cylindrical housing (1), the through hole (4) and the outer peripheral side wall of the sliding block (3) are circular.

7. The detection bolt for auxiliary positioning of the threaded hole center according to claim 1, characterized in that: n is equal to 3.

8. The detection bolt for auxiliary positioning of the threaded hole center according to claim 3, characterized in that: Punch points (13) are evenly distributed on the end surface of each sliding block (3) facing away from the screw rod (2), so that the outer peripheral side wall of the sliding block (3) undergoes radial plastic deformation, and the sliding block (3) that undergoes plastic deformation abuts against the inner wall of the through hole (4) or the cylindrical shell (1).

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