Portable measuring mechanism

Abstract

The utility model discloses a portable measuring mechanism, which comprises a rod body, an accommodating cavity is formed in the rod body, an annular groove is arranged on the side wall of the rod body corresponding to the accommodating cavity, and a plurality of through holes are arranged at the bottom of the annular groove; the supporting rod assemblies comprise a plurality of supporting rods which are arranged in the circumferential direction of the rod body at intervals, one ends of the supporting rods are fixed to the annular groove through rotating pairs, and at least two sets of supporting rod assemblies are arranged in the axial direction of the rod body at intervals; the reciprocating motion structure is arranged in the containing cavity; one end of each connecting piece is connected with the supporting rod through a rotating pair, and the other end of each connecting piece penetrates through the through hole and extends into the containing cavity to be connected with the output end of the reciprocating motion structure, so that the supporting rod assembly and the connecting pieces form an umbrella support structure; and the laser displacement sensor is arranged on the rod body. According to the measuring mechanism, the laser displacement sensor can be always in a fully stable state in the measuring process, and the accuracy of a detection result is ensured.

Description

Technical Field

[0001] This utility model relates to the field of artillery testing technology, and in particular to a lightweight measuring mechanism. Background Technology

[0002] Artillery is the main combat equipment of the army, and the barrel is its core component. During firing, the barrel is subjected not only to the impact and chemical effects of high-temperature, high-pressure propellant gases, but also to the friction of high-speed projectiles, resulting in more than a dozen defects. Failure to promptly and accurately diagnose and address these barrel defects can lead to shell jamming or barrel explosions, significantly impacting the safe use of the artillery. To ensure firing safety and accuracy, regular inspections of the barrel's internal condition are necessary to determine its quality level.

[0003] Existing inspection equipment can only detect the approximate location of defects, but cannot accurately measure the specific details of the defects. Therefore, it is necessary to use diameter measuring equipment for precise measurement. Currently, laser displacement sensors are generally used to inspect the inner wall of the barrel. During the inspection process, the laser displacement sensor rotates one full revolution to perform a comprehensive inspection of the inner wall of the barrel. Because laser displacement sensors have high detection accuracy, they need to be in a sufficiently stable state during the inspection process. If the fixation effect of the laser displacement sensor relative to the inner wall of the barrel is poor, and the position of the laser displacement sensor shifts during the measurement process due to factors such as rotation, the accuracy of the collected data will be poor, and it cannot be used as a basis for analysis.

[0004] Therefore, it is necessary to design a lightweight measuring mechanism to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a lightweight measuring mechanism that uses an umbrella support structure to ensure that the laser displacement sensor remains stable relative to the inner wall of the tube during the measurement process, and avoids affecting the fixing effect of the umbrella support structure due to friction or collision between the umbrella support structure and the inner wall of the tube when the measuring mechanism moves inside the tube.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A lightweight measuring mechanism, comprising:

[0008] The rod body has a cavity inside, and an annular groove is provided on the side wall of the rod body corresponding to the cavity position, and several through holes are provided at the bottom of the annular groove.

[0009] The support rod assembly includes a plurality of support rods spaced apart along the circumference of the rod body, one end of which is fixed to an annular groove by a rotating joint, and the support rod assembly is spaced apart along the axial direction of the rod body in at least two sets.

[0010] A reciprocating moving structure is disposed within the cavity;

[0011] The connector has one end connected to the support rod via a rotating joint, and the other end extends through the through hole into the cavity and is connected to the output end of the reciprocating moving structure, so that the support rod assembly and the connector form an umbrella support structure. Under the action of the reciprocating moving structure, the umbrella support structure can switch between a closed state that is folded into the annular groove and an open state that is unfolded and pressed against the inner wall of the body tube at one end.

[0012] A laser displacement sensor is mounted on the rod.

[0013] As a further improvement of this utility model, the reciprocating moving structure includes a lead screw, a drive structure for driving the lead screw to rotate, and a slider located on the lead screw.

[0014] As a further improvement of this utility model, the end of the connector away from the support rod is connected to the slider via a rotating joint.

[0015] As a further improvement of this utility model, one end of the lead screw is connected to the side wall of the cavity via a bearing, and the other end is connected to the drive structure.

[0016] As a further improvement of this utility model, the size of the through hole is smaller than the size of the support rod, so that when the umbrella support structure is in a closed state, the support rod fully covers the through hole.

[0017] As a further improvement of this utility model, the height of the annular groove is greater than the diameter of the support rod.

[0018] As a further improvement of this utility model, a disc is connected to the end of the support rod away from the annular groove.

[0019] As a further improvement of this utility model, the diameter of the disc component is smaller than the height of the annular groove.

[0020] As a further improvement of this utility model, the laser displacement sensor is disposed at one end of the rod and includes a detection element that can rotate relative to the rod and a driving element for driving the detection element to rotate.

[0021] As a further improvement of this utility model, the rod body is also provided with a cavity for placing the driving component.

[0022] The beneficial effects of this utility model are:

[0023] 1. By setting up an umbrella support structure, this utility model can improve the fixation effect of the rod relative to the inner wall of the tube during the measurement process of the laser displacement sensor, so that the laser displacement sensor is in a fully stable state and ensures the accuracy of the detection results; at the same time, the adjustable opening degree of the umbrella support structure allows the measuring mechanism to meet the detection requirements of tubes with different diameters.

[0024] 2. This utility model provides an annular groove on the side wall of the rod body, so that the umbrella support structure can be retracted into the annular groove when measurement is not required. This prevents the umbrella support structure from contacting the inner wall of the body tube when the measuring mechanism moves inside the tube, thus avoiding the impact on the fixing effect of the umbrella support structure due to friction or collision between the umbrella support structure and the inner wall of the body tube. In addition, the annular groove can also reduce the weight of the measuring mechanism to a certain extent. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the lightweight measuring mechanism of this utility model.

[0026] Figure 2 This is a schematic diagram of the umbrella support structure in a closed state.

[0027] Figure Labels

[0028] 10. Rod body; 11. Cavity; 12. Annular groove; 121. Through hole; 13. Hollow cavity; 20. Support rod; 21. Disc component; 30. Connector; 41. Lead screw; 42. Drive structure; 43. Slider; 51. Detection component; 52. Drive component. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0031] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Please see Figures 1-2 As shown, this utility model provides a lightweight measuring mechanism, comprising:

[0033] The rod body 10 has a cavity 11 inside, and an annular groove 12 is provided on the side wall of the rod body 10 corresponding to the cavity 11. The bottom of the annular groove 12 is provided with several through holes 121.

[0034] The support rod assembly includes a plurality of support rods 20 spaced apart along the circumference of the rod body 10, one end of which is fixed to the annular groove 12 by a rotating joint, and the support rod assembly is provided in two sets spaced apart along the axial direction of the rod body 10.

[0035] A reciprocating moving structure is disposed within the cavity 11;

[0036] The connector 30 has one end connected to the support rod 20 via a rotating joint, and the other end extends through the through hole 121 into the cavity 11 and is connected to the output end of the reciprocating moving structure, so that the support rod assembly and several connectors 30 form an umbrella support structure. Under the action of the reciprocating moving structure, the umbrella support structure can switch between a closed state that is folded into the annular groove 12 and an open state that is unfolded and pressed against the inner wall of the body tube at one end.

[0037] A laser displacement sensor is mounted on the rod 10.

[0038] Specifically, the reciprocating structure includes a lead screw 41, a drive structure 42 for driving the lead screw 41 to rotate, and a slider 43 located on the lead screw 41. For example, the drive structure 42 is a first motor; one end of the lead screw 41 is connected to the side wall of the cavity 11 via a bearing, and the other end is connected to the output end of the first motor; the slider 43 is a rolling nut. Under the action of the first motor, the rotation of the lead screw 41 drives the rolling nut to move axially along the lead screw 41.

[0039] Specifically, the end of the connector 30 away from the support rod 20 is connected to the slider 43 through a rotating pair. When the slider 43 moves along the axial direction of the lead screw 41, it drives the end of the connector 30 close to the lead screw 41 to move along the axial direction of the lead screw 41. This causes the support rod 20 to rotate around its connection point with the annular groove 12. The opening and closing degree of the umbrella support structure can be controlled by the reciprocating movement structure.

[0040] Specifically, such as Figure 2 As shown, the size of the through hole 121 is smaller than that of the support rod 20, so that when the umbrella support structure is in a closed state, the support rod 20 fully covers the through hole 121. That is, the support rod 20 acts as a shield, which can prevent external debris from entering the cavity 11 through the through hole 121 and adhering to the lead screw 41, thus affecting the service life of the reciprocating moving structure.

[0041] Specifically, the height of the annular groove 12 is greater than the diameter of the support rod 20, so that when the umbrella support structure is in the closed state, the support rod 20 can be completely retracted into the annular groove 12. This avoids uneven wear on the end of the support rod 20 away from the annular groove 12 caused by friction or collision between the umbrella support structure and the inner wall of the body tube when the measuring mechanism moves inside the body tube. This would prevent only some of the support rods 20 from fitting well against the inner wall of the body tube when the umbrella support structure is in the open state, thus affecting the fixing effect of the umbrella support structure.

[0042] Specifically, the end of the support rod 20 away from the annular groove 12 is connected to a disc 21, so that for different inner diameter tubes and when the umbrella support structure is in different open angles, the end of the support rod 20 away from the annular groove 12 can be well pressed against the inner wall of the tube; and the diameter of the disc 21 is smaller than the height of the annular groove 12, so that when the umbrella support structure is in the closed state, the disc 21 can be completely retracted into the annular groove 12.

[0043] Specifically, a cavity 13 is provided inside the rod body 10; a laser displacement sensor is provided at one end of the rod body 10, including a detection element 51 that can rotate relative to the rod body 10 and a driving element 52 for driving the detection element 51 to rotate, wherein the driving element 52 is a second motor provided inside the cavity 13.

[0044] In the initial state, the umbrella support structure is closed, the measuring mechanism is placed inside the tube and moved to the position to be tested; the drive structure 42 controls the lead screw 41 to rotate, so that the umbrella support structure opens until the end of the support rod 20 away from the annular groove 12 is tightly attached to the inner wall of the tube. Even when the umbrella support structure is open, the measuring mechanism can be stably fixed inside the tube; the drive component 52 drives the detection component 51 to rotate around the axis of the rod body 10, so that a specific position on the inner wall of the tube can be accurately measured.

[0045] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model.

Claims

1. A lightweight measuring mechanism, characterized in that, include: The rod body has a cavity inside, and an annular groove is provided on the side wall of the rod body corresponding to the cavity position, and several through holes are provided at the bottom of the annular groove. The support rod assembly includes a plurality of support rods spaced apart along the circumference of the rod body, one end of which is fixed to an annular groove by a rotating joint, and the support rod assembly is spaced apart along the axial direction of the rod body in at least two sets. A reciprocating moving structure is disposed within the cavity; The connector has one end connected to the support rod via a rotating joint, and the other end extends through the through hole into the cavity and is connected to the output end of the reciprocating moving structure, so that the support rod assembly and several connectors form an umbrella support structure. Under the action of the reciprocating moving structure, the umbrella support structure can switch between a closed state that is folded into the annular groove and an open state that is unfolded and pressed against the inner wall of the body tube at one end. A laser displacement sensor is mounted on the rod.

2. The lightweight measuring mechanism according to claim 1, characterized in that: The reciprocating moving structure includes a lead screw, a drive structure for driving the lead screw to rotate, and a slider located on the lead screw.

3. The lightweight measuring mechanism according to claim 2, characterized in that: The end of the connector furthest from the support rod is connected to the slider via a rotating joint.

4. The lightweight measuring mechanism according to claim 2, characterized in that: One end of the lead screw is connected to the side wall of the cavity via a bearing, and the other end is connected to the drive structure.

5. The lightweight measuring mechanism according to claim 1, characterized in that: The size of the through hole is smaller than the size of the support rod, so that when the umbrella support structure is in a closed state, the support rod fully covers the through hole.

6. The lightweight measuring mechanism according to claim 1, characterized in that: The height of the annular groove is greater than the diameter of the support rod.

7. The lightweight measuring mechanism according to claim 1, characterized in that: The end of the support rod away from the annular groove is connected to a disc.

8. The lightweight measuring mechanism according to claim 7, characterized in that: The diameter of the disc component is smaller than the height of the annular groove.

9. The lightweight measuring mechanism according to claim 1, characterized in that: The laser displacement sensor is disposed at one end of the rod and includes a detection element that can rotate relative to the rod and a driving element for driving the detection element to rotate.

10. The lightweight measuring mechanism according to claim 9, characterized in that: The rod body also has a cavity for placing the drive component.

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