Interfacial screw thread form inspection device

Abstract

The utility model provides an interface screw thread form testing device. The interface screw thread form testing device comprises a first clamping part and a second clamping part, wherein the first clamping part and the second clamping part are used for clamping two axial ends of a screw to be tested; the locking assembly drives the second clamping part to be close to or far away from the first clamping part; the driving assembly drives the distance measuring assembly to move in the central axis direction of the to-be-measured screw. According to the utility model, the two axial ends of the to-be-detected screw are stably clamped, and the clamping mode is beneficial to reducing vibration and offset in the detection process and improving the measurement precision; and the device can adapt to screws to be measured with different lengths, and the application range is expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of product detection, in particular to an inspection device for the thread profile of an interface screw. Background Art

[0002] In the field of precision manufacturing of magnesium alloy interface screws, due to the unique physical properties of magnesium alloy materials, its relative softness places higher requirements on processing accuracy. Ensuring the perfect match between the screw thread profile and the tap has become a key link related to surgical safety and success. Traditionally, the thread profile inspection of screws mostly uses the projector inspection method. Although this method can reflect the contour characteristics of the screw thread profile to a certain extent, compared with ordinary screws, the thread profile of magnesium alloy interface screws is a smooth wave curve, and the outer diameter gradually decreases, resulting in the projector being unable to accurately display the true size and shape of the thread profile during the projection process. Moreover, the differences in the placement position and angle of the interface screws during the detection process also lead to the inability to obtain a definite thread profile. In the prior art, there is also a method of collecting data of each point on the contour of the screw to be measured to the central axis and comparing the collected data with the standard data, but there will be problems such as low measurement accuracy due to vibration and deviation during the inspection process.

[0003] With the continuous improvement of the manufacturing industry's requirements for product quality, as well as the rapid development of technologies such as intelligent manufacturing and automated detection, the measurement methods of the prior art have been difficult to meet the needs of modern high-precision manufacturing. The market urgently needs a device that can more efficiently and accurately inspect the thread profile of magnesium alloy interface screws to ensure the stability and reliability of product quality. Summary of the Utility Model

[0004] The utility model provides an inspection device for the thread profile of an interface screw.

[0005] Specifically, the utility model is realized through the following technical solutions:

[0006] An embodiment of the utility model provides an inspection device for the thread profile of an interface screw, including:

[0007] A base, a bracket, a clamping assembly, a distance measuring assembly, a locking assembly, a driving assembly, and a central processing unit;

[0008] The clamping assembly includes a first clamping member and a second clamping member. Both the first clamping member and the second clamping member are arranged on the base, and the first clamping member and the second clamping member are used to clamp the axial ends of the screw to be measured;

[0009] The locking assembly drives the second clamping member to approach and move away from the first clamping member;

[0010] The bracket is arranged on the base, and the distance measuring assembly and the driving assembly are arranged on the bracket;

[0011] The driving component drives the distance measuring component to move along the central axis direction of the screw to be measured;

[0012] During the movement, the distance measuring component collects the height data of each point on the central axis direction of the screw to be measured and transmits it to the central processor for data processing.

[0013] In some embodiments,

[0014] The second clamping member includes a clamping slider;

[0015] The base is arranged in a U-shaped structure;

[0016] A chute adapted to the clamping slider is provided at the bottom of the U-shaped structure of the base;

[0017] The locking component abuts against the clamping slider;

[0018] When the locking component drives the clamping slider to gradually approach the first clamping member by rotation, the screw to be measured is clamped;

[0019] When the locking component drives the clamping slider to gradually move away from the first clamping member by rotation, the screw to be measured is loosened.

[0020] In some embodiments,

[0021] The first clamping member includes a clamping rod and a fixing member;

[0022] A first through hole and a second through hole are provided on the vertical arm of the U-shaped structure of the base close to the first clamping member, and the first through hole is communicated with the second through hole;

[0023] One end of the clamping rod away from the second clamping member is arranged in the first through hole;

[0024] The fixing member is in abutting and locking connection with the part of the clamping rod arranged in the first through hole through the second through hole.

[0025] In some embodiments, a first limiting portion is provided at one end of the clamping rod close to the second clamping member;

[0026] A second limiting portion is provided at one end of the clamping slider close to the first clamping member;

[0027] The first limiting portion and the second limiting portion respectively limit both ends of the screw to be measured.

[0028] In some embodiments, a third limiting member is provided on the clamping rod;

[0029] The third limiting member is sleeved on the portion of the clamping rod located within the U-shaped structure of the base; the outer diameter of the third limiting member is greater than the diameter of the first through hole.

[0030] In some embodiments, the locking assembly includes a screw.

[0031] One end of the screw abuts against the clamping slider.

[0032] A third through hole is provided on the vertical arm of the U-shaped structure of the base close to the second clamping member; a thread adapted to the screw is provided in the third through hole.

[0033] The screw drives the clamping slider to move in the sliding groove by rotating within the third through hole.

[0034] In some embodiments, the bracket includes a support rod and a support platform.

[0035] The support rod is connected to the vertical arm of the U-shaped structure of the base close to the second clamping member; the support platform is connected to the support rod.

[0036] The driving assembly is arranged on the support platform.

[0037] The driving assembly is connected to the ranging assembly.

[0038] The ranging assembly is suspended outside the support platform through the driving assembly.

[0039] In some embodiments, the ranging assembly includes a micro ranging sensor, and the sampling time interval of the micro ranging sensor is set to 0.05 - 0.1 seconds per point.

[0040] In some embodiments, the driving assembly is set as a cylinder driving component.

[0041] In some embodiments, the bracket further includes an adjusting portion.

[0042] The support platform is sleeved on the support rod.

[0043] The adjusting portion adjusts the position of the support platform on the support rod by rotation.

[0044] According to the embodiments of the present invention, both the first clamping member and the second clamping member are arranged on the base. The second clamping member can approach or move away from the first clamping member through the locking assembly. After approaching, stable clamping of the axial two ends of the screw to be measured is achieved. This clamping method helps to reduce vibration and deviation during the inspection process, improve the measurement accuracy; and can adapt to screws to be measured with different lengths, expanding the application range.

[0045] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and do not limit this application. Brief Description of the Drawings

[0046] The drawings herein are incorporated into and constitute a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application.

[0047] Figure 1 is a side view of the overall structure in an embodiment of the present utility model;

[0048] Figure 2 is a bottom side view of the overall structure in an embodiment of the present utility model;

[0049] Figure 3 is a front view of the overall structure in an embodiment of the present utility model;

[0050] Figure 4 is a schematic diagram of the detection result of the screw to be measured in an embodiment of the present utility model.

[0051] Reference Numerals:

[0052] 1: Base; 1-1: Slide groove; 1-2: First through hole; 1-3: Second through hole; 1_4: Third through hole;

[0053] 2: Bracket; 2-1: Support rod; 2-2: Support platform; 2-3: Adjusting part;

[0054] 3: Clamping assembly; 3-1: First clamping member; 3-1-1: Clamping rod; 3-1-2: Fixing member; 3-1-3: First limiting part; 3-1_4: Third limiting member;

[0055] 3-2: Second clamping member; 3-2-1: Clamping slider; 3-2-2: Second limiting part;

[0056] 4: Distance measuring assembly;

[0057] 5: Locking assembly; 5-1: Screw;

[0058] 6: Driving assembly. Detailed Description of the Embodiments

[0059] Now, the present utility model will be described with reference to several embodiments. It should be understood that these embodiments are described only to enable those of ordinary skill in the art to better understand and thus implement the present utility model, rather than implying any limitation to the scope of the present utility model.

[0060] As used herein, the term "comprising" and its variants are to be construed as open-ended terms meaning "including but not limited to"; the terms "embodiment" and "an embodiment" are to be construed as "at least one embodiment"; the term "another embodiment" is to be construed as "at least one other embodiment"; the terms "first", "second", etc. may refer to different or the same objects; the term "arranged" is not limited to direct connection or indirect connection, nor to a specific connection manner. There may also be other explicit and implicit definitions hereinafter.

[0061] In the following description, some specific numerical values or numerical ranges may be involved. It should be understood that these numerical values and numerical ranges are merely exemplary and may be conducive to putting the idea of the present utility model into practice. However, the description of these examples is not intended to limit the scope of the present utility model in any way. According to specific application scenarios and requirements, these numerical values or numerical ranges can be set otherwise.

[0062] As described above, the interface screw thread form inspection device of the prior art cannot accurately display the true size and shape of the thread form, which affects the inspection accuracy. The interface screw thread form inspection device proposed in the embodiments of the present utility model at least partially solves the above problems. The following describes the structural composition and working principle of the interface screw thread form inspection device according to the exemplary embodiments of the present utility model.

[0063] The interface screw thread form inspection device of the embodiments of the present utility model generally includes:

[0064] a base 1, a bracket 2, a clamping assembly 3, a ranging assembly 4, a locking assembly 5, a driving assembly 6, and a central processing unit; Figure 1 shows a side view of the overall structure in an embodiment of the present utility model; Figure 2 shows a bottom side view of the overall structure in an embodiment of the present utility model; Figure 3 shows a front view of the overall structure in an embodiment of the present utility model, as Figure 1 , Figure 2 and Figure 3As shown, the clamping assembly 3 includes a first clamping member 3-1 and a second clamping member 3-2. Both the first clamping member 3-1 and the second clamping member 3-2 are arranged on the base 1. The base 1 is the basic support structure of the whole device, ensuring that the device can remain stable and not shake during the inspection process. The base can be of any shape. The first clamping member 3-1 and the second clamping member 3-2 are used to clamp the axial two ends of the screw to be tested; the locking assembly 5 drives the second clamping member to approach and move away from the first clamping member. The second clamping member 3-2 is opposite to the first clamping member 3-1, and its position can be adjusted by the locking assembly 5 to adapt to screws to be tested with different lengths and facilitate the positioning and installation of the screws to be tested. The second clamping member 3-2 and the first clamping member 3-1 can be two planes, or can be provided with clamping surfaces respectively matching the head and tail of the screw to be tested to ensure that the axial two ends of the screw to be tested can be firmly clamped. The second clamping member 3-2 and the first clamping member 3-1 are coaxially arranged. When clamping the main screw to be tested, the three are coaxial, which is convenient for improving the ranging accuracy of the ranging assembly 4.

[0065] The bracket 2 is arranged on the base 1, and the ranging assembly 4 and the driving assembly 6 are arranged on the bracket 2; in this embodiment, the driving assembly 6 is connected to the bracket 2, and the ranging assembly 4 is suspended above the screw to be tested through the driving assembly 6. The ranging assembly 4 is suspended above the screw to be tested by the drive of the driving assembly 6. This enables the ranging assembly 4 to perform non-contact measurement without contacting the surface of the screw, thus avoiding measurement errors caused by contact or damage to the surface of the screw; the driving assembly 6 drives the ranging assembly 4 to move along the central axis direction of the screw to be tested; the driving assembly 6 may use a motor, a cylinder or an electric push rod, etc. as the power source and transmit the power to the ranging assembly 4 through a transmission mechanism (such as gears, belts, lead screws, etc.). The ranging assembly 4 collects the height data of each point on the central axis direction of the screw to be tested during the movement process and transmits it to the central processor for data processing. The movement speed of the ranging assembly 4 is uniform. The central processor summarizes the data of different points of the screw to be tested to form a position-height curve graph, and compares it with the upper and lower standard curves of the dimensional tolerance zone of the screw to be tested. Thus, the thread profile detection result of the screw to be tested can be quickly obtained.

[0066] In one embodiment, the second clamping member 3-2 includes a clamping slider 3-2-1; the base 1 is arranged in a U-shaped structure; a chute 1-1 adapted to the clamping slider 3-2-1 is provided at the bottom of the U-shaped structure of the base 1; the locking assembly 5 abuts against the clamping slider 3-2-1; when the locking assembly 5 drives the clamping slider 3-2-1 to gradually approach the first clamping member 3-1 by rotation, the screw to be measured is clamped; when the locking assembly 5 drives the clamping slider 3-2-1 to gradually move away from the first clamping member 3-1 by rotation, the screw to be measured is loosened. The clamping slider 3-2-1 is provided with a clamping surface matching the tail of the screw to be measured to ensure that the screw to be measured can be firmly clamped. A sliding mechanism adapted to the chute 1-1 on the base 1, such as a roller, a slider or a groove matching structure, etc., is provided at the bottom or side of the clamping slider 3-2-1, so that the clamping slider can smoothly move in the chute. Further, in this embodiment, the chute 1-1 is provided with a first chute portion and a second chute portion, the width of the first chute portion is greater than the width of the second chute portion, the clamping slider 3-2-1 is provided with a first clamping slider portion and a second clamping slider portion, the width of the first clamping slider portion is greater than the width of the second clamping slider portion. During installation, the first clamping slider portion is arranged in the first chute portion, the second clamping slider portion is arranged in the second chute portion, and both the first chute portion and the first clamping slider portion are closer to the placement plane; so that the clamping slider 3-2-1 will not fall off from the chute 1-1 while sliding in the chute 1-1.

[0067] In one embodiment, the first clamping member 3-1 includes a clamping rod 3-1-1 and a fixing member 3-1-2; a first through hole 1-2 and a second through hole 1-3 are provided on the vertical arm of the U-shaped structure of the base 1 close to the first clamping member 3-1, and the first through hole 1-2 communicates with the second through hole 1-3; one end of the clamping rod 3-1-1 away from the second clamping member 3-2 is arranged in the first through hole 1-2; the fixing member 3-1-2 abuts against and locks the part of the clamping rod 3-1-1 arranged in the first through hole 1-2 through the second through hole 1-3. In this embodiment, the two vertical arms of the U-shaped structure of the base 1 are perpendicular to the bottom of the U-shaped structure of the base 1. When the device is placed on a horizontal plane, the axis of the first through hole 1-2 is parallel to the bottom of the U-shaped structure of the base 1. One end of the clamping rod 3-1-1 is arranged in the first through hole 1-2, and the other end is used to abut against the screw to be measured. The position of the second through hole 1-3 can be the side or the top of the vertical arm of the U-shaped structure of the base 1 close to the first clamping member 3-1 where the first through hole 1-2 is not provided. Those skilled in the art can understand that as long as it communicates with the first through hole 1-2. In this embodiment, it is arranged at the top to facilitate the fixing member 3-1-2 to abut against and lock the part of the clamping rod 3-1-1 arranged in the first through hole 1-2 through the second through hole 1-3 by using gravity. The fixing member 3-1-2 can be a screw structure, and a matching thread is arranged in the second through hole 1-3, or a clamping structure matching the fixing member 3-1-2 is arranged on the clamping rod 3-1-1. The clamping rod 3-1-1 is stably connected to the base 1 through the fixing member 3-1-2, which is convenient for improving the measurement accuracy and also for replacing relevant components.

[0068] In one embodiment, a first limiting portion 3-1-3 is arranged at one end of the clamping rod 3-1-1 close to the second clamping member 3-2; a second limiting portion 3-2-2 is arranged at one end of the clamping slider 3-2-1 close to the first clamping member 3-1; the first limiting portion 3-1-3 and the second limiting portion 3-2-2 limit the two ends of the screw to be measured respectively. Optionally, in this embodiment, the first limiting portion 3-1-3 can be arranged as a clamping structure adapted to the head of the screw to be measured, and the second limiting portion 3-2-2 is arranged as a clamping structure adapted to the tail of the screw to be measured. For example, the first limiting portion 3-1-3 can be arranged as a cross-shaped structure, and the second limiting portion 3-2-2 is arranged as a tapered groove structure. It is convenient to clamp the two ends of the screw to be measured and improve the measurement accuracy.

[0069] In one embodiment, a third limiting member 3-1_4 is provided on the clamping rod 3-1-1; the third limiting member 3-1_4 is sleeved on the part of the clamping rod 3-1-1 located within the U-shaped structure of the base 1; the outer diameter of the third limiting member 3-1_4 is greater than the diameter of the first through hole 1-2. The function of the third limiting member 3-1_4 is to limit the end of the clamping rod 3-1-1 in contact with the screw to be measured from entering the first through hole 1-2, limit the movement range of the clamping rod 3-1-1 within the first through hole 1-2, and prevent the clamping rod 3-1-1 from continuously moving into the first through hole 1-2 due to the thrust of the clamping slider 3-2-1.

[0070] In one embodiment, the locking assembly 5 includes a screw rod 5-1; one end of the screw rod 5-1 abuts against the clamping slider 3-2-1; this abutment is a movable connection, and a third through hole 1_4 is provided on the vertical arm of the U-shaped structure of the base 1 close to the second clamping member 3-2; a thread adapted to the screw rod 5-1 is provided in the third through hole 1_4; the screw rod 5-1 drives the clamping slider 3-2-1 to move in the chute 1-1 by rotating within the third through hole 1_4. During use, the handle of the screw rod 5-1 can be rotated or an external tool, such as a wrench, can be used to drive the screw rod 5-1 to rotate. As the screw rod 5-1 rotates within the third through hole 1_4, its thread interacts with the thread on the base 1, causing the screw rod 5-1 to move axially. This movement process is converted into a thrust on the clamping slider 3-2-1 or the release of the clamping slider 3-2-1, thereby driving the clamping slider to move in the chute 1-1 and gradually approach or move away from the first clamping member 3-1. When the distance between the clamping slider 3-2-1 and the first clamping member 3-1 is small enough, they will jointly clamp the screw to be measured.

[0071] In one embodiment, the bracket 2 includes a support rod 2-1 and a support platform 2-2; the support rod 2-1 is connected to the vertical arm of the U-shaped structure of the base 1 close to the second clamping member 3-2; two support rods 2-1 are provided, and the support platform 2-2 is connected to the support rods 2-1; the driving assembly 6 is arranged on the support platform 2-2; the driving assembly 6 is connected to the ranging assembly 4; the ranging assembly 4 is suspended outside the support platform 2-2 through the driving assembly 6, so that there is no obstacle between the ranging assembly 4 and the screw to be measured, facilitating detection. Further, in this embodiment, the bracket 2 further includes an adjusting portion 2-3; the support platform 2-2 is sleeved on the support rod 2-1; the adjusting portion 2-3 adjusts the position of the support platform 2-2 on the support rod 2-1 by rotation. The adjusting portion 2-3 precisely adjusts the vertical position of the support platform 2-2 on the support rod 2-1 by a rotational method. This adjustment ability ensures the optimal distance between the ranging assembly 4 and the screw to be measured, helping to reduce measurement errors caused by improper distances.

[0072] In one embodiment, the ranging component 4 includes a micro ranging sensor, and the sampling time interval of the micro ranging sensor is set to 0.05 - 0.1 seconds per point. The driving component 6 is set as a cylinder driving component. The lateral moving speed of the cylinder connecting rod is 3 - 6 mm / second; the length of the screw to be measured is between 20 - 30 mm, and 100 - 200 points can be taken to fit the curve; the dimensional tolerance band of the screw to be measured is: (The value range of D is 3 - 9 mm). Figure 4 Fig. shows a schematic diagram of the detection result of the screw to be measured in an embodiment of the present invention. The screw to be measured is detected by using the above-mentioned interface screw thread profile inspection device, and the detection result is as Figure 4 shown. The judgment criterion is that within 1 second, if there are more than 5 points exceeding the solid line, it is judged as unqualified. If the size is too large, it is easy to break when screwing, and if it is too small, it is easy to unscrew.

[0073] Any reference to directions and orientations in the description of the embodiments herein is for the purpose of description only and should not be construed as any limitation on the protection scope of the present invention. The description of the preferred embodiments may involve combinations of features, which may exist independently or in combination. The present invention is not particularly limited to the preferred embodiments. The scope of the present invention is defined by the claims.

[0074] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An interface screw thread profile inspection device, characterized in that, Comprising: A base (1), a bracket (2), a clamping assembly (3), a distance measuring assembly (4), a locking assembly (5), a driving assembly (6), and a central processing unit; The clamping assembly (3) includes a first clamping member (3-1) and a second clamping member (3-2). Both the first clamping member (3-1) and the second clamping member (3-2) are arranged on the base (1), and the first clamping member (3-1) and the second clamping member (3-2) are used to clamp the axial two ends of the screw to be measured; The locking assembly (5) drives the second clamping member (3-2) to approach and move away from the first clamping member (3-1); The bracket (2) is arranged on the base (1), and the distance measuring assembly (4) and the driving assembly (6) are arranged on the bracket (2); The driving assembly (6) drives the distance measuring assembly (4) to move along the central axis direction of the screw to be measured; During the movement, the distance measuring assembly (4) collects the height data of each point on the central axis direction of the screw to be measured and transmits it to the central processing unit for data processing.

2. The interface screw thread profile inspection device according to claim 1, characterized in that The second clamping member (3-2) includes a clamping slider (3-2-1); The base (1) is arranged in a U-shaped structure; A chute (1-1) adapted to the clamping slider (3-2-1) is provided at the bottom of the U-shaped structure of the base (1); The locking assembly (5) abuts against the clamping slider (3-2-1); When the locking assembly (5) rotates to drive the clamping slider (3-2-1) to gradually approach the first clamping member (3-1) in the chute (1-1), the screw to be measured is clamped; When the locking assembly (5) rotates to drive the clamping slider (3-2-1) to gradually move away from the first clamping member (3-1) in the chute (1-1), the screw to be measured is released.

3. The interface screw thread profile inspection device according to claim 2, characterized in that The first clamping member (3-1) includes a clamping rod (3-1-1) and a fixing member (3-1-2); A first through hole (1-2) and a second through hole (1-3) are provided on the vertical arm of the U-shaped structure of the base (1) close to the first clamping member (3-1), and the first through hole (1-2) communicates with the second through hole (1-3); One end of the clamping rod (3-1-1) far from the second clamping member (3-2) is arranged in the first through hole (1-2); The fixing member (3-1-2) abuts and locks with the part of the clamping rod (3-1-1) arranged in the first through hole (1-2) through the second through hole (1-3).

4. The interface screw thread profile inspection device according to claim 3, characterized in that A first limiting portion (3-1-3) is provided at one end of the clamping rod (3-1-1) close to the second clamping member (3-2); A second limiting portion (3-2-2) is provided at one end of the clamping slider (3-2-1) close to the first clamping member (3-1); The first limiting portion (3-1-3) and the second limiting portion (3-2-2) limit the two ends of the screw to be measured respectively.

5. The interface screw thread profile inspection device according to claim 3, characterized in that A third limiting member (3-1_4) is provided on the clamping rod (3-1-1); The third limiting member (3-1_4) is sleeved on the part of the clamping rod (3-1-1) located inside the U-shaped structure of the base (1); The outer diameter of the third limiting member (3-1_4) is greater than the diameter of the first through hole (1-2).

6. The interface screw thread profile inspection device according to claim 2, characterized in that The locking assembly (5) includes a screw rod (5-1); One end of the screw rod (5-1) abuts against the clamping slider (3-2-1); A third through hole (1_4) is provided on the vertical arm of the U-shaped structure of the base (1) close to the second clamping member (3-2); Threads adapted to the screw rod (5-1) are provided in the third through hole (1_4); The screw rod (5-1) drives the clamping slider (3-2-1) to move in the sliding groove (1-1) by rotating in the third through hole (1_4).

7. The interface screw thread profile inspection device according to claim 2, characterized in that The bracket (2) includes a support rod (2-1) and a support platform (2-2); The support rod (2-1) is connected to the vertical arm of the U-shaped structure of the base (1) close to the second clamping member (3-2); The support platform (2-2) is connected to the support rod (2-1); The driving assembly (6) is arranged on the support platform (2-2); The driving assembly (6) is connected to the distance measuring assembly (4); The distance measuring assembly (4) is suspended outside the support platform (2-2) through the driving assembly (6).

8. The interface screw thread profile inspection device according to claim 1, characterized in that The distance measuring assembly (4) includes a micro distance measuring sensor, and the sampling time interval of the micro distance measuring sensor is set to 0.05 - 0.1 second / point.

9. The interface screw thread profile inspection device according to claim 1, characterized in that, The driving assembly (6) is set as a cylinder driving component.

10. The interface screw thread profile inspection device according to claim 7, characterized in that The bracket (2) further includes an adjusting portion (2-3); The support platform (2-2) is sleeved on the support rod (2-1); The adjusting portion (2-3) adjusts the position of the support platform (2-2) on the support rod (2-1) by rotation.

Images