Auxiliary device for measuring depth

Abstract

The utility model discloses a measuring device. The measuring device comprises an adapter and a measuring rod. The measuring base of the depth vernier caliper is in contact with the second end of the adapter, the first end of the adapter is in contact with the reference surface of the to-be-measured workpiece, the caliper body measuring end of the depth vernier caliper is in contact with one end of the measuring rod, and the other end of the measuring rod is in contact with the measured surface of the to-be-measured workpiece. Meanwhile, the positioning cylinder and the workpiece to be detected are positioned and fixed. The length of the measuring rod is equal to the distance from the first end to the second end of the adapter, so that the moving distance of the caliper body of the depth vernier caliper relative to the measuring base is equal to the moving distance of the measuring rod relative to the adapter. The auxiliary device for measuring the depth solves the problem that the depth vernier caliper cannot directly measure the depth size due to the special structure of the workpiece to be measured, avoids the situation that the depth size can be obtained only through multiple times of measurement and calculation in the related technology, and has the characteristics of few measurement steps, few measurement data, no need of calculation and high measurement precision.

Description

Technical Field

[0001] This application relates to the field of measuring tools, and in particular to an auxiliary device for measuring depth. Background Technology

[0002] During machining, due to the special structure of the workpiece to be measured, the measuring base of the depth vernier caliper cannot contact the reference surface of the workpiece, which means that the depth vernier caliper cannot directly measure some depth dimensions.

[0003] In related technologies, multiple sets of dimensions need to be measured and calculated to obtain the required depth dimension. This method introduces more errors, resulting in larger errors and low measurement efficiency.

[0004] Figure 3 A locking mechanism for the mouth of a fire extinguisher bottle includes: a large cylindrical shell 5, a piston 6, a small cylindrical shell 7, a sealing membrane 8, and a locking fastener 9. One end of the large cylindrical shell 5 is connected to the fire extinguisher bottle and communicates with its interior, while the other end is connected to the small cylindrical shell 7. The large cylindrical shell 5 contains a first baffle 502 with a first central hole 501, and the small cylindrical shell 7 contains a second baffle 702 with a second central hole 701. The piston 6 is movably disposed within the large cylindrical shell 5 between the first and second baffles 502, and the end of the piston 6 facing the second baffle 702 has a piercing tip 601. The sealing membrane 8 is located on the side of the second baffle 702 opposite to the piercing tip 601. A locking fastener 9 is provided within the retaining ring to secure the sealing membrane 8. When the fire extinguisher bottle needs to be used, the piston 6 moves towards and pierces the sealing membrane 8 to release the extinguishing agent from the bottle. During the manufacturing or maintenance of the locking structure, the distance between the sealing membrane 8 and the tip of the piercing membrane 601 is the piston stroke L. Only when the piston stroke L is greater than 2mm is the locking structure qualified. That is, it is necessary to measure the distance between the end face of the second baffle 702 facing the sealing membrane 8 and the tip of the piercing membrane 601.

[0005] In the prior art, measuring the piston stroke L includes the following steps:

[0006] First, measure the distance A between the first baffle 502 and the end of the large cylindrical shell 5 connecting to the small cylindrical shell 7; second, measure the distance B from the end of the large cylindrical shell 5 connecting to the small cylindrical shell 7 to the tip of the piercing membrane 601; third, calculate the difference between A and B; fourth, measure the distance C between the two ends of the small cylindrical shell 7; fifth, measure the distance D between the second baffle 702 and the end of the small cylindrical shell 7 away from the large cylindrical shell 5; sixth, calculate the difference between C and D; seventh, sum the differences between A and B and the differences between C and D to obtain the piston stroke L.

[0007] Therefore, there is an urgent need to design an auxiliary measuring device for depth measurement to make the measurement more accurate and the measurement process simpler. Utility Model Content

[0008] This application provides an auxiliary device for measuring depth, which can solve the technical problem in the prior art that depth vernier calipers cannot directly measure depth due to the special shape of the workpiece, resulting in large measurement errors and low measurement efficiency. The technical solution is as follows:

[0009] An auxiliary device for measuring depth, used to assist a depth vernier caliper in measuring depth, includes: an adapter and a measuring rod; wherein, the adapter has a first end and a second end disposed opposite to each other, the adapter has a through hole extending from the first end to the second end, the first end is provided with a positioning cylinder sharing a central axis with the through hole; the measuring rod is movably disposed within the through hole, the length of the measuring rod being equal to the distance from the first end to the second end; the end face of the first end is flat, the first end is used to contact a reference surface of the workpiece to be measured, and the end of the measuring rod, which is in the same direction as the first end, is used to contact the measured surface of the workpiece to be measured; the end face of the second end is flat, the second end is used to contact the measuring base of the depth vernier caliper, and the end of the measuring rod, which is in the same direction as the second end, is used to contact the measuring head of the depth vernier caliper.

[0010] Optionally, the sidewall of the adapter has a threaded hole 105 perpendicular to and communicating with the through hole, and a stop screw is provided in the threaded hole. The stop screw is used to lock or unlock the measuring rod and the adapter.

[0011] Optionally, there is a first fitting clearance between the measuring rod and the through hole, and the first fitting clearance is less than or equal to the fitting clearance between the scale body and the measuring base in the depth vernier caliper.

[0012] Optionally, the through hole is a straight circular hole, and the measuring rod is a round rod.

[0013] Optionally, the through hole is a countersunk hole, which includes a countersunk hole and a guide hole communicating with the countersunk hole. The measuring rod includes a rod head and a rod body connected to the rod head.

[0014] Optionally, the rod body and the guide hole have a second fitting clearance, and the second fitting clearance is less than or equal to the fitting clearance between the scale body and the measuring base in the depth vernier caliper; the rod head and the countersunk hole have a third fitting clearance, and the third fitting clearance is greater than or equal to the second fitting clearance.

[0015] Optionally, the inner wall of the positioning cylinder has a connecting structure for connecting with the workpiece to be tested.

[0016] Optionally, the connection structure is an internal thread, and the workpiece to be tested has an external thread that matches the internal thread.

[0017] Optionally, the first end of the adapter has a clearance structure surrounding the through hole.

[0018] Optionally, the avoidance structure is a circular annular avoidance groove, a square annular avoidance groove, or an avoidance blind hole.

[0019] The beneficial effects of the technical solutions provided in this application include at least the following:

[0020] A measuring device includes an adapter and a measuring rod. The measuring base of a depth vernier caliper contacts the second end of the adapter, the first end of the adapter contacts the reference surface of the workpiece to be measured, the measuring end of the depth vernier caliper contacts one end of the measuring rod, and the other end of the measuring rod contacts the measured surface of the workpiece. Simultaneously, a positioning cylinder positions and fixes the workpiece to be measured. Since the length of the measuring rod is equal to the distance from the first to the second end of the adapter, the distance the depth vernier caliper moves relative to the measuring base is equal to the distance the measuring rod moves relative to the adapter. This depth measuring auxiliary device solves the problem that depth vernier calipers cannot directly measure depth dimensions due to the special structure of the workpiece, avoiding the need for multiple measurements and calculations required in related technologies. It features fewer measurement steps, less measurement data, no calculation required, and high measurement accuracy.

[0021] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a cross-sectional schematic diagram of the auxiliary device for measuring depth provided in the embodiments of this application;

[0024] Figure 2 yes Figure 1 Exploded cross-sectional view of the auxiliary device for measuring depth;

[0025] Figure 3 This is a cross-sectional schematic diagram of a locking mechanism for the mouth of a fire extinguisher bottle provided in an embodiment of this application;

[0026] Figure 4 This is a structural diagram of a depth vernier caliper;

[0027] Figure 5This is a schematic diagram of measuring the piston stroke in the fire extinguisher bottle locking mechanism using the depth measuring auxiliary device provided in the embodiments of this application.

[0028] Explanation of reference numerals in the attached figures

[0029] 1-Adapter; 101-First end; 102-Second end; 103-Through hole; 1031-Counterhole; 1032-Guide hole; 104-Positioning cylinder; 1041-Internal thread; 105-Threaded hole; 106-Annular clearance groove; 2-Measuring rod; 201-Rod head; 202-Rod body; 3-Stop screw; 4-Depth vernier caliper; 401-Measuring base; 402-Scale body; 5-Large cylinder shell; 501-First center hole; 502-First baffle; 6-Piston; 601-Diaphragm tip; 7-Small cylinder shell; 701-Second center hole; 702-Second baffle; 8-Sealing film; 9-Clamping device. Detailed Implementation

[0030] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0031] In this disclosure, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the relative positions of the corresponding components in the direction of gravity when they are in use, and "inner" and "outer" refer to their relative positions to the contours of the corresponding components themselves. Furthermore, the terms "first," "second," etc., used in this disclosure are for distinguishing one element from another and do not have sequential or importance implications. In the following description, when referring to the accompanying drawings, unless otherwise explained, the same reference numerals in different drawings denote the same or similar elements.

[0032] Figure 3A locking mechanism for the mouth of a fire extinguisher bottle includes: a large cylindrical shell 5, a piston 6, a small cylindrical shell 7, a sealing membrane 8, and a locking fastener 9. One end of the large cylindrical shell 5 is connected to the fire extinguisher bottle and communicates with its interior, while the other end is connected to the small cylindrical shell 7. The large cylindrical shell 5 contains a first baffle 502 with a first central hole 501, and the small cylindrical shell 7 contains a second baffle 702 with a second central hole 701. The piston 6 is movably disposed within the large cylindrical shell 5 between the first and second baffles 502, and the end of the piston 6 facing the second baffle 702 has a piercing tip 601. The sealing membrane 8 is located on the side of the second baffle 702 opposite to the piercing tip 601. A locking fastener 9 is provided within the retaining ring to secure the sealing membrane 8. When the fire extinguisher bottle needs to be used, the piston 6 moves towards and pierces the sealing membrane 8 to release the extinguishing agent from the bottle. During the manufacturing or maintenance of the locking structure, the distance between the sealing membrane 8 and the tip of the piercing membrane 601 is the piston stroke L. Only when the piston stroke L is greater than 2mm is the locking structure qualified. That is, it is necessary to measure the distance between the end face of the second baffle 702 facing the sealing membrane 8 and the tip of the piercing membrane 601.

[0033] In the prior art, measuring the piston stroke L includes the following steps:

[0034] First, measure the distance A between the first baffle 502 and the end of the large cylindrical shell 5 connecting to the small cylindrical shell 7; second, measure the distance B from the end of the large cylindrical shell 5 connecting to the small cylindrical shell 7 to the tip of the piercing membrane 601; third, calculate the difference between A and B; fourth, measure the distance C between the two ends of the small cylindrical shell 7; fifth, measure the distance D between the second baffle 702 and the end of the small cylindrical shell 7 away from the large cylindrical shell 5; sixth, calculate the difference between C and D; seventh, sum the differences between A and B and the differences between C and D to obtain the piston stroke L.

[0035] It is evident that the existing measurement process involves many steps and a large amount of data, with each step introducing new errors, resulting in large measurement errors and low measurement efficiency.

[0036] According to the embodiments of this application, refer to Figure 1 As shown, an auxiliary device for measuring depth is provided, including: an adapter 1 and a measuring rod 2.

[0037] refer to Figure 2 As shown, the adapter 1 has a first end 101 and a second end 102 disposed opposite to each other. The adapter 1 has a through hole 103 extending from the first end 101 to the second end 102. The first end 101 is provided with a positioning cylinder 104 that shares a central axis with the through hole 103.

[0038] Please continue to refer to this. Figure 2As shown, the measuring rod 2 is movably disposed within the through hole 103, and the length of the measuring rod 2 is equal to the distance from the first end 101 to the second end 102.

[0039] The end face of the first end 101 is a plane, and the first end 101 is used to contact the reference surface of the workpiece to be measured. The end of the measuring rod 2, which is in the same direction as the first end 101, is used to contact the measured surface of the workpiece to be measured.

[0040] The end face of the second end 102 is a plane. The second end 102 is used to contact the measuring base 401 of the depth vernier caliper 4. The end of the measuring rod 2, which is in the same direction as the second end 102, is used to contact the measuring head of the scale body 402 of the depth vernier caliper 4.

[0041] In the above embodiment, due to the special structure of the workpiece to be measured, the measuring base 401 of the depth vernier caliper 4 cannot contact the reference surface of the workpiece, thus preventing the depth vernier caliper 4 from directly measuring some depth dimensions. The first end 101 of the adapter 1 is designed according to the shape of the workpiece to be measured, allowing the first end 101 to contact the reference surface of the workpiece. In use, the measuring base 401 of the depth vernier caliper 4 contacts the second end 102 of the adapter 1, the first end 101 of the adapter 1 contacts the reference surface of the workpiece to be measured, the measuring end of the scale body 402 of the depth vernier caliper 4 contacts one end of the measuring rod 2, and the other end of the measuring rod 2 contacts the measured surface of the workpiece. Simultaneously, the positioning cylinder 104 needs to be positioned and fixed with the workpiece to be measured, so that the scale body 402 of the depth vernier caliper 4 is in the same direction as the measurement. Furthermore, since the length of the measuring rod 2 is equal to the distance from the first end 101 to the second end 102 of the adapter 1, the movement distance of the scale body 402 of the depth vernier caliper 4 relative to the measuring base 401 is equal to the movement distance of the measuring rod 2 relative to the adapter 1. This solves the problem that the depth vernier caliper cannot directly measure the depth dimension due to the special structure of the workpiece to be measured, avoiding the need for multiple measurements and calculations in related technologies to obtain the depth dimension. The depth measurement auxiliary device of this application has the advantages of fewer measurement steps, less measurement data, no need for calculation, and high measurement accuracy.

[0042] According to the embodiments of this application, refer to Figure 2 As shown, to facilitate reading, the relative positions of the measuring rod 2 and the adapter 1 need to be fixed. In this embodiment, the side wall of the adapter 1 has a threaded hole 105 perpendicular to and communicating with the through hole 103. A stop screw 3 is provided in the threaded hole 105, which is used to lock or unlock the measuring rod 2 and the adapter 1. When a reading is needed, the stop screw 3 is screwed into the threaded hole 105 and pressed against the measuring rod 2. After the reading is completed, the stop screw 3 is rotated in the loosening direction to unlock the measuring rod 2 from the adapter 1.

[0043] According to the embodiments of this application, refer to Figure 2 As shown, in order to improve the measurement accuracy of the measuring device and avoid new errors caused by excessive gap between the measuring rod 2 and the through hole 103 of the adapter 1, there is a first fitting gap between the measuring rod 2 and the through hole 103. The first fitting gap must be ≤ the fitting gap between the scale body 402 and the measuring base 401 in the depth vernier caliper 4. For example, the first fitting gap is ≤ 0.05 mm.

[0044] According to the embodiments of this application, refer to Figure 2 As shown, the through hole 103 is a straight circular hole, and the measuring rod 2 is a round rod. According to an embodiment of this application, refer to... Figure 2 As shown, the through hole 103 can also be a countersunk hole 103, which includes a countersunk hole 1031 and a guide hole 1032 communicating with the countersunk hole 1031. The measuring rod 2 includes a rod head 201 and a rod body 202 connected to the rod head 201. This design prevents the measuring rod 2 from falling directly from the through hole 103 of the adapter 1 and injuring it during accidental operation.

[0045] According to an embodiment of this application, in order to improve the measurement accuracy of the measuring device and avoid new errors caused by excessive gap between the measuring rod 2 and the through hole 103 of the adapter 1, a second fitting gap is provided between the rod body 202 and the guide hole 1032, and the second fitting gap is ≤ the fitting gap between the scale body 402 and the measuring base 401 in the depth vernier caliper 4, for example, the second fitting gap is ≤ 0.05mm.

[0046] There is a third fitting clearance between the rod head 201 and the countersunk hole 1031, and the third fitting clearance is greater than or equal to the second fitting clearance.

[0047] According to an embodiment of this application, the inner wall of the positioning cylinder 104 has a connecting structure for connecting with the workpiece to be measured. The connecting structure reliably connects the workpiece to be measured with the adapter 1, preventing the workpiece from shaking during measurement.

[0048] Example, reference Figure 2 As shown, the connection structure is an internal thread 1041, and the workpiece to be tested may have an external thread that matches the internal thread 1041. In other embodiments, the connection structure may also be in other forms, such as interlocking hooks and pins, slots and strips, etc., and this application does not limit this.

[0049] According to the embodiments of this application, refer to Figure 2As shown, in some special workpieces to be tested, in order to better contact the first end 101 of the adapter 1 with the reference surface of the workpiece, the first end 101 of the adapter 1 has a clearance structure surrounding the through hole 103. The clearance structure can be a circular annular clearance groove 106, a square annular clearance groove 106, or a clearance blind hole. The specific design can be made according to the actual situation.

[0050] The implementation principle of this application will be explained below by taking the piston stroke L of piston 6 in the locking structure of a fire extinguisher as an example.

[0051] refer to Figure 3 As shown, Figure 1 The locking mechanism installed at the mouth of the fire extinguisher bottle includes: a large cylinder shell 5, a piston 6, a small cylinder shell 7, a sealing membrane 8, and a locking device 9.

[0052] One end of the large cylindrical shell 5 is connected to the fire extinguishing bottle and communicates with its interior, while the other end is connected to the small cylindrical shell 7. The large cylindrical shell 5 contains a first baffle 502 with a first central hole 501, and the small cylindrical shell 7 contains a second baffle 702 with a second central hole 701. A piston 6 is movably disposed within the large cylindrical shell 5 between the first and second baffles 502, and the end of the piston 6 facing the second baffle 702 has a piercing tip 601. A sealing membrane 8 is located on the side of the second baffle 702 opposite to the piercing tip 601. A fastener 9 is provided within the retaining ring to secure the sealing membrane 8. When the fire extinguishing bottle needs to be used, the piston 6 moves towards the sealing membrane 8 and pierces it to release the extinguishing agent from the fire extinguishing bottle. During the manufacturing or maintenance of the locking structure, the distance between the sealing membrane 8 and the tip of the piercing membrane 601 is the piston stroke L. Only when the piston stroke L is greater than 2mm is the locking structure qualified. That is, it is necessary to measure the distance L between the end face of the second baffle 702 facing the sealing membrane 8 and the tip of the piercing membrane 601.

[0053] refer to Figures 3 to 5 The specific operation steps for measuring the piston stroke L using the depth measurement auxiliary device according to the embodiments of this application are as follows:

[0054] First, since the outer wall of the large cylindrical shell 5 has external threads, the inner wall of the positioning cylinder 104 of the adapter 1 is provided with internal threads 1041. Since the end of the small cylindrical shell 7 protrudes from the second baffle 702, the first end 101 of the adapter 1 is provided with an annular clearance groove 106. The adapter 1 is threadedly connected to the large cylindrical shell 5 so that the first end 101 of the adapter 1 contacts the second baffle 702.

[0055] The second step is to push the measuring rod 2 toward the workpiece to be measured, so that the lower end of the measuring rod 2 contacts the tip of the piercing film 601, and tighten the stop screw 3.

[0056] The third step is to bring the measuring base 401 of the depth vernier caliper 4 into contact with the second end 102 of the adapter 1;

[0057] Fourth step, move the body 402 of the depth vernier caliper 4 so that the measuring end of the body 402 contacts the upper end of the measuring rod 2, and lock the body 402 and the measuring base 401.

[0058] The fifth step is to take a reading on the depth vernier caliper 4. The reading on the depth vernier caliper 4 is the piston stroke L.

[0059] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0060] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0061] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. An auxiliary device for measuring depth, used to assist a depth vernier caliper (4) in measuring depth, characterized in that, The auxiliary device includes: an adapter (1) and a measuring rod (2); The adapter (1) has a first end (101) and a second end (102) disposed opposite to each other. The adapter (1) has a through hole (103) extending from the first end (101) to the second end (102). The first end (101) is provided with a positioning cylinder (104) that shares a central axis with the through hole (103). The measuring rod (2) is movably disposed within the through hole (103), and the length of the measuring rod (2) is equal to the distance from the first end (101) to the second end (102); The end face of the first end (101) is a plane. The first end (101) is used to contact the reference surface of the workpiece to be measured. The end of the measuring rod (2) which is in the same direction as the first end (101) is used to contact the measured surface of the workpiece to be measured. The end face of the second end (102) is a plane. The second end (102) is used to contact the measuring base (401) of the depth vernier caliper (4). The end of the measuring rod (2) which is in the same direction as the second end (102) is used to contact the measuring head of the scale body (402) of the depth vernier caliper (4).

2. The auxiliary device for measuring depth according to claim 1, characterized in that, The sidewall of the adapter (1) has a threaded hole (105) perpendicular to the through hole (103) and communicating with the through hole (103). A stop screw (3) is provided in the threaded hole (105). The stop screw (3) is used to lock or unlock the measuring rod (2) and the adapter (1).

3. The auxiliary device for measuring depth according to claim 1, characterized in that, There is a first fitting gap between the measuring rod (2) and the through hole (103), and the first fitting gap is less than or equal to the fitting gap between the scale body (402) of the depth vernier caliper (4) and the measuring base (401).

4. The auxiliary device for measuring depth according to claim 1, characterized in that, The through hole (103) is a straight circular hole, and the measuring rod (2) is a round rod.

5. The auxiliary device for measuring depth according to claim 1, characterized in that, The through hole (103) is a countersunk hole, which includes a countersunk hole (1031) and a guide hole (1032) communicating with the countersunk hole (1031). The measuring rod (2) includes a rod head (201) and a rod body (202) connected to the rod head (201).

6. The auxiliary device for measuring depth according to claim 5, characterized in that, There is a second fitting clearance between the rod body (202) and the guide hole (1032), and the second fitting clearance is ≤ the fitting clearance between the scale body (402) and the measuring base (401) in the depth vernier caliper (4); There is a third fitting clearance between the rod head (201) and the countersunk hole (1031), and the third fitting clearance is greater than or equal to the second fitting clearance.

7. The auxiliary device for measuring depth according to claim 1, characterized in that, The inner wall of the positioning cylinder (104) has a connecting structure for connecting with the workpiece to be tested.

8. The auxiliary device for measuring depth according to claim 7, characterized in that, The connection structure is an internal thread (1041), and the workpiece to be tested has an external thread that matches the internal thread (1041).

9. The auxiliary device for measuring depth according to claim 1, characterized in that, The first end (101) of the adapter (1) has a clearance structure surrounding the through hole (103).

10. The auxiliary device for measuring depth according to claim 9, characterized in that, The avoidance structure is a circular annular avoidance groove (106), a square annular avoidance groove (106), or an avoidance blind hole.

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