Measuring tool

Abstract

The invention relates to a measuring tool, which comprises a stop block, the surface of the stop block is provided with a planar detection surface, and the detection surface is provided with a detection port; the cantilever is provided with two separated detection arms, a detection channel with an opening in one end is formed between the two detection arms, the detection channel is located at the position corresponding to the detection opening, the width of the detection channel is matched with the diameter of the tail of the pin, and the surfaces of the sides, away from the detection surface, of the two detection arms are located on the same plane to form a positioning surface; the positioning surface is parallel to the detection surface; the detection mechanism is provided with a measurement rocker, the measurement rocker is hinged to the check block, one end of the measurement rocker penetrates through the detection opening and is exposed out of the detection face, and when the measurement rocker rotates, the detection mechanism gives out a prompt; wherein the distance between the detection surface and the positioning surface corresponds to the upper limit size of the tail length of the pin, and the distance between the detection surface and the measurement rocker corresponds to the lower limit size of the tail length of the pin.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of part measurement, in particular to a measuring tool. BACKGROUND

[0002] The pin is a mechanical element used for positioning and fastening parts, which plays an important role in the connection of mechanical parts. Therefore, it is necessary to use a specified method to test the specified technical performance indicators of the pin. Inspection and detection, as the cornerstone of quality control, are used in many fields such as production, scientific research, supervision, etc., and their scientificity and standardization directly affect product safety and industrial upgrading. At present, when detecting the pin, the length of the tail of the pin needs to be measured by using a caliper. Therefore, the user needs to hold the caliper to measure the pin one by one. There are problems such as low inspection efficiency, large labor intensity of operators for large quantities of products, etc. Therefore, there is an urgent need for a measuring tool that can reduce the operation difficulty, improve the detection efficiency and reduce the labor intensity of the operators. SUMMARY

[0003] In view of the above problems of the prior art, the present application provides a measuring tool which can reduce the operation difficulty, improve the detection efficiency and reduce the labor intensity of the operators.

[0004] The present application provides a measuring tool for detecting the length of the tail of the pin, the pin comprising a head, a shoulder and a tail connected in sequence along the axial direction thereof; comprising: a stop block, a planar detection surface is provided on the surface of the stop block, and a detection port is provided on the detection surface; a cantilever, the cantilever has two separate detection arms, a detection channel with one end open is formed between the two detection arms, the detection channel is located at the position corresponding to the detection port, the width of the detection channel is matched with the diameter of the tail of the pin, the surfaces of the two detection arms away from the detection surface are on the same plane to form a positioning surface, and the positioning surface is parallel to the detection surface; a detection mechanism, the detection mechanism has a measuring rocker, the measuring rocker is hinged to the stop block, one end of the measuring rocker is exposed from the detection surface through the detection port, and the detection mechanism gives a prompt when the measuring rocker rotates; wherein the distance between the detection surface and the positioning surface corresponds to the upper limit size of the length of the tail of the pin, and the distance between the detection surface and the measuring rocker corresponds to the lower limit size of the length of the tail of the pin.

[0005] By using the above structure, when the length of the tail of the pin is detected by using the measuring tool in the present application, the pin can be placed on the cantilever, the shoulder of the pin is abutted with the positioning surface of the detection arm, and the tail of the pin extends towards the direction where the detection surface is located through the detection channel. Then, the pin is driven to move along the detection channel, and whether the length of the tail is within the tolerance range is detected.

[0006] Specifically, when the driving pin is moved along the detection channel to make the pin close to the stop block, the distance between the detection surface and the positioning surface corresponds to the upper limit size of the tail length of the pin. If the tail length exceeds the upper limit size, the end of the tail will pass the detection surface, and the end of the tail will abut against the stop block, and cannot reach above the detection surface, and thus cannot contact the measurement rocker. Therefore, it represents that the tail length of the pin is too long, and does not meet the tolerance requirement, and the pin is unqualified.

[0007] Since the distance between the detection surface and the measurement rocker corresponds to the lower limit size of the tail length of the pin, if the tail length is less than the lower limit size, during the movement of the driving pin along the detection channel, the end of the tail cannot contact the measurement rocker. Therefore, it represents that the tail length of the pin is too short, and does not meet the tolerance requirement, and the pin is unqualified.

[0008] When the tail length is within the tolerance range, during the movement of the driving pin along the detection channel, the end of the tail not only can move above the detection surface, but also can contact the measurement rocker exposed on the detection surface, push the measurement rocker to rotate, and make the detection mechanism issue a prompt, so that the operator can confirm that the pin is qualified.

[0009] Therefore, when the pin is detected by using the measurement tool in the present application, the pin only needs to be placed on the cantilever, the shoulder of the pin is abutted against the positioning surface, and is moved along the detection channel, so that whether the tail length is within the tolerance range can be detected. Therefore, the operation difficulty of detecting the pin is reduced, the detection efficiency is improved, and the labor intensity of the operator is reduced.

[0010] As a possible implementation manner in the present application, the cantilever and the stop block are slidingly connected in a direction perpendicular to the detection surface.

[0011] By adopting the above structure, the distance between the positioning surface and the detection surface and the measurement rocker can be adjusted by slidingly connecting the cantilever and the stop block in a direction perpendicular to the detection surface, so that the measurement tool can be adapted to pins of different size specifications.

[0012] As a possible implementation manner in the present application, the measurement tool further comprises a counter block, one end of the counter block is used to abut against the detection surface, and the other end is used to abut against the surface of the cantilever on the side facing the detection surface, so that the distance between the detection surface and the positioning surface corresponds to the upper limit size of the tail length of the pin.

[0013] By adopting the above structure, by setting the counter block, and by abutting the two ends of the counter block against the cantilever and the detection surface, the distance between the cantilever and the detection surface can be limited and calibrated, so that the distance between the detection surface and the positioning surface corresponds to the upper limit size of the tail length of the pin, and thus the detection accuracy of the measurement tool can be improved, and the use of the measurement tool is facilitated.

[0014] As a possible implementation manner in the present application, the pair of blocks are provided in plurality, and correspond to pins of different size specifications respectively.

[0015] With the above structure, by providing a plurality of pair of blocks, pins of different size specifications are corresponded respectively. Thus, when the specification of the pin to be detected by the detection tool changes, the position of the cantilever corresponding to the pair of blocks can be calibrated. Thus, the use range of the detection tool can be improved, the use difficulty of the detection tool can be reduced, and the detection efficiency can be improved.

[0016] As a possible implementation manner in the present application, the measuring tool further comprises an adjusting block, the adjusting block is fixedly installed on the stop block and located close to the detection port, a sliding rail is provided on the side surface of the adjusting block facing the detection port, the extension direction of the sliding rail is perpendicular to the detection surface, and the cantilever is in sliding connection with the sliding rail.

[0017] With the above structure, by the sliding connection between the cantilever and the sliding rail on the adjusting block, the cantilever can slide in the direction perpendicular to the detection surface.

[0018] As a possible implementation manner in the present application, the measuring tool further comprises a fastening bolt, the fastening bolt is arranged on the adjusting block, and the cantilever is fastened to the adjusting block after sliding to the predetermined position on the sliding rail.

[0019] With the above structure, by providing the fastening bolt, after the cantilever reaches the predetermined position on the sliding rail, the cantilever is fastened to the adjusting block, so that the cantilever can be fixed, thereby facilitating the measurement of the pin by the measuring tool and avoiding the position of the cantilever changing during the measurement, which affects the detection result.

[0020] As a possible implementation manner in the present application, a through-hole shaped fastening hole is provided at the bottom of the sliding rail, the fastening hole extends along the extension direction of the sliding rail, and the fastening bolt is in threaded connection with the cantilever through the fastening hole.

[0021] With the above structure, by providing the fastening hole at the bottom of the sliding rail, the fastening hole extends along the extension direction of the sliding rail, so that after the fastening bolt is in threaded connection with the cantilever through the fastening hole, the fastening bolt can slide along the sliding rail with the cantilever, so as to fasten the cantilever to the adjusting block by tightening the fastening bolt after the cantilever reaches the predetermined position.

[0022] As a possible implementation manner in the present application, the two detection arms are arranged in parallel.

[0023] Adopting the structure, the width of the detection channel between the two detection arms can be kept unchanged, thereby the stability of the pin moving along the detection channel can be improved, and the detection precision is further improved.

[0024] As a possible implementation manner in the application, the detection mechanism further comprises a micro switch and an indicator light, the micro switch is arranged at a position corresponding to the measurement rocker, the micro switch is driven to open and close by rotation, and the micro switch is electrically connected with the indicator light to control the indicator light to turn on and off.

[0025] Adopting the structure, the micro switch is driven to open and close by the measurement rocker, thereby the indicator light is controlled to turn on and off, so that when the tail of the pin contacts the measurement rocker and drives the measurement rocker to rotate, that is, when the detection result of the pin is qualified, the indicator light is turned on, thereby prompting the operator that the detection result of the pin is qualified. Correspondingly, if the indicator light is not turned on during the detection process, the operator can confirm that the detection result of the pin is unqualified.

[0026] As a possible implementation manner in the application, the detection mechanism further comprises an elastic member, the elastic member is used to drive the measurement rocker to reset after the pin drives the measurement rocker to rotate.

[0027] Adopting the structure, the measurement rocker is driven to reset by the elastic member, so that after the measurement rocker rotates and completes the detection, the measurement rocker returns to the state that the detection surface is exposed, that is, the distance between the positioning surface and the measurement rocker returns to the position corresponding to the lower limit size of the length of the tail of the pin, thereby facilitating the detection of the next pin.

[0028] These and other aspects of the present application will become more fully understood in light of the following detailed description of the specification. BRIEF DESCRIPTION OF DRAWINGS

[0029] The various features and linkages between features of the present application will be further explained in the following description in view of the drawings. The drawings are schematic and some features are not shown to scale, and some features in the drawings can omit features that are conventional in the field to which the application pertains and are not essential to the application, or additional features that are not essential to the application can be shown, and the combination of features shown in the drawings is not intended to limit the application. In addition, the same reference signs refer to the same elements throughout the specification. The specific drawings are as follows: Figure 1 It is a structure schematic diagram of the pin in the application; Figure 2 It is a perspective structure schematic diagram of the measuring tool in the application; Figure 3 It is Figure 2 It is a top view schematic diagram of the measuring tool in the application; Figure 4 for Figure 3 A cross-sectional view along the AA direction; Figure 5 For use Figure 2 A schematic diagram of the structure in which a measuring tool is used to inspect a pin; Figure 6 This is a side orthographic projection diagram of the dial gauge block in the measuring tool of this application; Figure 7 for Figure 6 A schematic diagram of the top orthographic projection of the surface.

[0030] Explanation of reference numerals in the attached figures 10 Measuring tool; 100 Mounting mechanism; 110 Base; 111 Accommodation space; 120 Stop; 121 Detection surface; 122 Stop surface; 123 Detection port; 200 Adjustment mechanism; 210 Adjustment block; 211 Guide rail; 212 Fastening hole; 220 Cantilever; 221 Detection arm; 222 Positioning surface; 223 Detection channel; 230 Fastening bolt; 300 Detection mechanism; 310 Measuring rocker arm; 320 Elastic element; 330 Fixing bolt; 340 Micro switch; 350 Indicator light; 360 Equipment switch; 400 Dial gauge block; 20 Pin; 21 Head; 22 Shoulder; 23 Tail; 30 Rocker arm. Detailed Implementation

[0031] The term "comprising" as used in the specification and claims should not be construed as limiting itself to what follows; it does not exclude other elements. Therefore, it should be interpreted as specifying the presence of the mentioned feature, integral, or component, but does not exclude the presence or addition of one or more other features, integrals, or components, or groups thereof. Thus, the statement "equipment comprising means A and B" should not be limited to an equipment consisting solely of components A and B.

[0032] The term "an embodiment" or "an embodiment" as used in this specification means that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in at least one embodiment of the invention. Therefore, the terms "in one embodiment" or "in an embodiment" appearing throughout this specification do not necessarily refer to the same embodiment, but may refer to the same embodiment. Furthermore, in one or more embodiments, the particular features, structures, or characteristics can be combined in any suitable manner, as will be apparent to those skilled in the art from this disclosure.

[0033] Figure 1 This is a schematic diagram of the structure of pin 20 in this application. Figure 1As shown, the pin 20 in this application is a pin 20 mounted on the rocker arm 30 of an aircraft engine. The pin 20 can be inspected directly before installation or after installation on the rocker arm 30. The pin 20 comprises three cylindrical parts: a head 21, a shoulder 22, and a tail 23. The head 21, shoulder 22, and tail 23 are coaxially arranged and connected sequentially along the axis. The diameter of the tail 23 is smaller than the diameters of the head 21 and shoulder 22. Specifically, the inspection of the pin 20 involves checking whether the length of the tail 23 is within its machining tolerance range.

[0034] This application provides a measuring tool 10 for detecting the length of the tail 23 of a pin 20. Below, with reference to the accompanying drawings, possible embodiments of the measuring tool 10 of this application will be described by way of example.

[0035] Figure 2 This is a three-dimensional structural schematic diagram of the measuring tool 10 in this application; Figure 3 for Figure 2 A schematic diagram of the top orthographic projection of the measuring tool 10; Figure 4 for Figure 3 A cross-sectional view along the AA direction; Figure 5 For use Figure 2 A schematic diagram of the structure in which the measuring tool 10 measures the pin 20. (See diagram for example.) Figures 2-5 As shown, the measuring tool 10 in this application includes a stop 120, a cantilever 220, and a detection mechanism 300. The stop 120 has a planar detection surface 121 with a detection port 123. The cantilever 220 has two separately arranged detection arms 221, forming a detection channel 223 with one open end between them. The detection channel 223 is located at the position corresponding to the detection port 123, and its width matches the diameter of the tail 23 of the pin 20. The surfaces of the two detection arms 221 away from the detection surface 121 are on the same plane, forming a positioning surface 222, which is parallel to the detection surface 121. The detection mechanism 300 has a measuring rocker arm 310, which is hinged to the stop 120. One end of the measuring rocker arm 310 passes through the detection port 123 and protrudes from the detection surface 121. When the measuring rocker arm 310 rotates, the detection mechanism 300 issues a prompt. The distance between the detection surface 121 and the positioning surface 222 corresponds to the upper limit of the length of the tail 23 of the pin 20, and the distance between the detection surface 121 and the measuring rocker arm 310 corresponds to the lower limit of the length of the tail 23 of the pin 20.

[0036] Therefore, when the length of the tail portion 23 of the pin 20 is detected by using the measuring tool 10 in the application, the pin 20 can be placed on the cantilever 220, the shoulder 22 of the pin 20 is abutted against the positioning surface 222 of the detection arm 221, and the tail portion 23 of the pin 20 extends towards the direction of the detection surface 121 through the detection channel 223. Then, the pin 20 is driven to move along the detection channel 223, and whether the length of the tail portion 23 is within the tolerance range is detected.

[0037] Specifically, when the pin 20 is driven to move along the detection channel 223 and the pin 20 approaches the stopper 120, if the length of the tail portion 23 exceeds the upper limit size, the end of the tail portion 23 will pass the detection surface 121, the end of the tail portion 23 will abut against the stopper 120, and the end of the tail portion 23 cannot reach above the detection surface 121, so the end of the tail portion 23 cannot contact the measuring rocker 310. Therefore, it is represented that the length of the tail portion 23 of the pin 20 is too long, and the pin 20 does not meet the tolerance requirement, and the pin 20 is unqualified.

[0038] If the length of the tail portion 23 is less than the lower limit size, during the process of driving the pin 20 to move along the detection channel 223, the end of the tail portion 23 cannot contact the measuring rocker 310. Therefore, it is represented that the length of the tail portion 23 of the pin 20 is too short, and the pin 20 does not meet the tolerance requirement, and the pin 20 is unqualified.

[0039] When the length of the tail portion 23 is within the tolerance range, during the process of driving the pin 20 to move along the detection channel 223, the end of the tail portion 23 not only can move above the detection surface 121, but also can contact the measuring rocker 310 exposed on the detection surface 121, push the measuring rocker 310 to rotate, and make the detection mechanism 300 give a prompt, so that the operator confirms that the pin 20 is qualified.

[0040] Therefore, when the pin 20 is detected by using the measuring tool 10 in the application, the pin 20 only needs to be placed on the cantilever 220, the shoulder 22 of the pin 20 is abutted against the positioning surface 222, and the pin 20 is moved along the detection channel 223, so that whether the length of the tail portion 23 is within the tolerance range can be detected. Therefore, the operation difficulty of detecting the pin 20 is reduced, the detection efficiency is improved, and the labor intensity of the operator is reduced.

[0041] In some embodiments, as Figures 2-5As shown, the cantilever 220 and the stop 120 are slidably connected in a direction perpendicular to the detection surface 121. Thus, by making the cantilever 220 and the stop 120 slidably connected in a direction perpendicular to the detection surface 121, the distance between the positioning surface 222 and the detection surface 121 and the measuring rocker arm 310 can be adjusted, thereby enabling the measuring tool 10 to be adapted to pins 20 of different sizes and specifications.

[0042] Figure 6 This is a side orthographic projection of the dial gauge block 400 in the measuring tool 10 of this application; Figure 7 for Figure 6 A schematic diagram of the top orthographic projection of the surface. (See diagram below.) Figure 6 , Figure 7 As shown, in some embodiments, the measuring tool 10 further includes a counter block 400. One end of the counter block 400 is used to abut against the detection surface 121, and the other end is used to abut against the surface of the cantilever 220 facing the detection surface 121, so that the distance between the detection surface 121 and the positioning surface 222 corresponds to the upper limit dimension of the length of the tail 23 of the pin 20. Thus, by setting the counter block 400, and by having both ends of the counter block 400 abut against the cantilever 220 and the detection surface 121, the distance between the cantilever 220 and the detection surface 121 can be limited and calibrated, so that the distance between the detection surface 121 and the positioning surface 222 corresponds to the upper limit dimension of the length of the tail 23 of the pin 20, thereby improving the detection accuracy of the measuring tool 10 and facilitating its use.

[0043] In some embodiments, multiple dial gauge blocks 400 are provided, each corresponding to a pin 20 of different sizes and specifications. Thus, by providing multiple dial gauge blocks 400, each corresponding to a pin 20 of different sizes and specifications, the position of the cantilever 220 can be calibrated using the corresponding dial gauge surface when the specifications of the pin 20 to be inspected by the inspection tool change. This expands the applicability of the inspection tool, reduces its ease of use, and ultimately improves inspection efficiency.

[0044] In some embodiments, such as Figures 2-5 As shown, the measuring tool 10 also includes an adjustment block 210, which is fixedly mounted on the stop block 120 and located near the detection port 123. The adjustment block 210 has a slide rail on its surface facing the detection port 123, and the extension direction of the slide rail is perpendicular to the detection surface 121. The cantilever 220 is slidably connected to the slide rail. Thus, through the slidable connection between the cantilever 220 and the slide rail on the adjustment block 210, the cantilever 220 can slide in a direction perpendicular to the detection surface 121.

[0045] In some embodiments, such as Figures 2-5As shown, the measuring tool 10 further comprises a fastening bolt 230, which is arranged on the adjusting block 210 and fastens the cantilever 220 and the adjusting block 210 after the cantilever 220 is slid to the predetermined position on the slide rail. Thus, by arranging the fastening bolt 230, the cantilever 220 can be fastened to the adjusting block 210 after the cantilever 220 is slid to the predetermined position on the slide rail, so that the cantilever 220 can be fixed to facilitate the measuring tool 10 to measure the pin 20 and avoid the position of the cantilever 220 changing during the measurement, which affects the detection result.

[0046] In some embodiments, as shown in Figure 4 As shown, the bottom of the slide rail is provided with a through-hole-shaped fastening hole 212, which extends along the extension direction of the slide rail. The fastening bolt 230 is threadedly connected with the cantilever 220 through the fastening hole 212. Thus, by arranging the fastening hole 212 on the bottom of the slide rail, the fastening bolt 230 can slide along the slide rail with the cantilever 220 after the fastening bolt 230 is threadedly connected with the cantilever 220 through the fastening hole 212, so that the cantilever 220 can be fastened to the adjusting block 210 by tightening the fastening bolt 230 after the cantilever 220 reaches the predetermined position.

[0047] In some embodiments, the fastening bolt 230 can also be arranged at a corresponding position on the side of the slide rail, so that the fastening bolt 230 is threadedly connected with the adjusting block 210. By rotating the fastening bolt 230, the end of the fastening bolt 230 can extend into the slide rail. Thus, after the cantilever 220 is moved to the predetermined position in the slide rail, the end of the fastening bolt 230 can be abutted with the cantilever 220 by tightening the fastening bolt 230, so that the cantilever 220 is fastened to the adjusting block 210.

[0048] In some embodiments, as shown in Figure 2 , Figure 3 , Figure 5 As shown, the two detection arms 221 are arranged in parallel. Thus, the width of the detection channel 223 between the two detection arms 221 can remain unchanged, so that the stability of the pin 20 moving along the detection channel 223 can be improved, and the detection accuracy can be improved.

[0049] In some embodiments, as shown in Figure 2 , Figure 4 , Figure 5As shown, the detection mechanism 300 further comprises a micro switch 340 and an indicator light 350. The micro switch 340 is arranged at a position corresponding to the measurement rocker 310. The micro switch 340 is driven to open and close by rotation. The micro switch 340 is electrically connected to the indicator light 350, and controls the brightness of the indicator light 350. Thus, the micro switch 340 is driven to open and close by the measurement rocker 310, so as to control the brightness of the indicator light 350. When the tail 23 of the pin 20 is in contact with the measurement rocker 310, and the measurement rocker 310 is driven to rotate, i.e., when the detection result of the pin 20 is qualified, the indicator light 350 is turned on, so as to prompt the operator that the detection result of the pin 20 is qualified. Correspondingly, if the indicator light 350 is not turned on during the detection process, the operator can confirm that the detection result of the pin 20 is unqualified.

[0050] In some embodiments, as Figure 4 As shown, the detection mechanism 300 further comprises an elastic member 320. The elastic member 320 is used to drive the measurement rocker 310 to reset after the pin 20 drives the measurement rocker 310 to rotate. Thus, the measurement rocker 310 is driven to reset by the elastic member 320, so as to restore the measurement rocker 310 to the state that the detection surface 121 is exposed after the measurement rocker 310 rotates and completes the detection. That is, the distance between the positioning surface 222 and the measurement rocker 310 is restored to a position corresponding to the lower limit size of the length of the tail 23 of the pin 20, so as to facilitate the detection of the next pin 20.

[0051] The above describes the possible embodiments of the measurement tool 10 in the present application. In the following, the specific structure of the measurement tool 10 in the present application is described in detail in a specific embodiment in combination with the drawings.

[0052] As shown in the drawings, Figures 2-5 The measurement tool 10 in the present application comprises a mounting mechanism 100, an adjusting mechanism 200, and a detection mechanism 300. The adjusting mechanism 200 and the detection mechanism 300 are mounted on the mounting mechanism 100. The adjusting mechanism 200 is used to place the pin 20, and can adapt to the detection of pins 20 of different specifications and sizes by adjusting its own structure. The detection mechanism 300 is used to detect the length of the tail 23 of the pin 20 on the adjusting mechanism 200.

[0053] As shown in the drawings, Figures 2-5As shown, the mounting mechanism 100 comprises a base 110 and a block 120. The base 110 is a stepped block component, and the inside of the base 110 is provided with a receiving space 111 for mounting the detection mechanism 300. The receiving space 111 is provided with an opening at the top of the base 110, so as to mount the detection mechanism 300. The block 120 is a right-angle broken line shaped block component, which is shaped to match the stepped shape of the top of the base 110, so that after the block 120 is mounted on the top of the base 110, the block 120 can be attached to the top of the base 110 and close the opening of the top of the base 110.

[0054] As shown, Figures 2-5 The top of the block 120 is provided with a planar detection surface 121, and the detection surface 121 is connected to a vertical downward extending planar stop surface 122 at one end corresponding to the step bend of the base 110. The detection surface 121 is provided with a rectangular detection port 123 at a position close to the stop surface 122, and the detection port 123 communicates with the receiving space 111, so that the following measuring rocker 310 of the detection mechanism 300 is exposed by the detection port 123 and exposed on the detection surface 121.

[0055] As shown, Figures 2-5 The adjustment mechanism 200 comprises an adjustment block 210, a cantilever 220 and a fastening bolt 230. The adjustment block 210 is vertically mounted on the detection surface 121 and is arranged at a position close to the detection port 123. The adjustment block 210 is provided with a guide rail 211 extending in the vertical direction on the surface of the side facing the detection port 123, and one end of the cantilever 220 is mounted in the guide rail 211 and can only slide up and down in the vertical direction under the limitation of the guide rail 211. The bottom of the guide rail 211 is provided with a through-hole shaped fastening hole 212 extending along the extension direction of the guide rail 211. The fastening bolt 230 is screwed through the fastening hole 212 and the one end of the cantilever 220, and after the cantilever 220 is moved to a predetermined position along the guide rail 211, the cantilever 220 can be fastened and mounted on the adjustment block 210 by rotating the fastening bolt 230.

[0056] As shown, Figures 2-5 The cantilever 220 is provided with two separate detection arms 221, which horizontally extend away from the adjustment block 210, and the top of the two detection arms 221 forms a horizontally arranged positioning surface 222. The two detection arms 221 are arranged in parallel and form a long strip shaped detection channel 223 in the middle. The width of the detection channel 223 matches the diameter of the tail 23 of the pin 20, so that the tail 23 of the pin 20 can pass through the detection channel 223, and the shoulder 22 of the pin 20 can be attached to the positioning surfaces 222 on both sides of the detection channel 223. An opening is formed at one end of the detection channel 223 away from the adjustment block 210, so that the pin 20 can enter the detection channel 223 from the opening position of the detection channel 223 and move along the detection channel 223.

[0057] As shown in Figures 2-5 , the detection mechanism 300 includes a measuring rocker 310, an elastic member 320, a fixing bolt 330, a micro switch 340 and an indicator lamp 350. The measuring rocker 310 is an L-shaped component, and is hinged to the stopper 120 at the bending position. One end of the measuring rocker 310 extends vertically upward from the detection opening 123, so that the one end of the measuring rocker 310 is exposed on the detection surface 121. The other end of the measuring rocker 310 extends horizontally into the accommodating space 111, and the upper surface of the other end of the measuring rocker 310 is attached to the lower surface of the stopper 120. The fixing bolt 330 is arranged on the one end of the measuring rocker 310 and extends along the extending direction of the other end of the measuring rocker 310. The fixing bolt 330 is located at the corresponding position of the detection opening 123, i.e. in the thickness range of the stopper 120 in the corresponding area of the detection surface 121. The elastic member 320 is a spring, which is sleeved on the fixing bolt 330, and one end of the elastic member 320 abuts against the one end of the measuring rocker 310, and the other end of the elastic member 320 abuts against the opening position of the stopper 120. Thus, the one end of the measuring rocker 310 can be rotated by the elastic member 320, so that the other end of the measuring rocker 310 is attached to the lower surface of the stopper 120.

[0058] As shown in Figure 4 , the micro switch 340 is arranged below the other end of the measuring rocker 310 and abuts against the other end of the measuring rocker 310. The micro switch 340 is electrically connected to the indicator lamp 350. Thus, when the other end of the measuring rocker 310 rotates downward, the micro switch 340 can be driven to open, so as to control the indicator lamp 350 to emit light. When the other end of the measuring rocker 310 is attached to the lower surface of the stopper 120, the micro switch 340 can be closed, so as to control the indicator lamp 350 to stop emitting light.

[0059] As shown in Figure 6 , Figure 7 , the measuring tool 10 further includes a reference block 400. The reference block 400 is a columnar component, and has two ends parallel to each other. The height of the reference block 400 is set such that, when the reference block 400 is placed on the detection surface 121, the lower end of the reference block 400 is attached to the detection surface 121, and then the cantilever 220 is operated to move along the slide rail, so that the lower surface of the cantilever 220 is attached to the upper end of the reference block 400, the distance between the detection surface 121 and the positioning surface 222 corresponds to the upper limit size of the length of the tail portion 23 of the pin 20. At this time, the distance between the measuring rocker 310 exposed on the detection surface 121 and the positioning surface 222 corresponds to the lower limit size of the length of the tail portion 23 of the pin 20.

[0060] As shown in Figure 3 , Figure 4As shown, the detection arm 221 extends beyond the stop surface 122. Thus, enough space is left for the pin 20 so that when the pin 20 enters the detection channel 223 through the opening of the detection channel 223, the shoulder 22 can still abut against the positioning surface 222 even if the length of the tail 23 exceeds the upper limit (i.e. the distance between the positioning surface 222 and the detection surface 121).

[0061] Thus, when the pin 20 is detected by the measuring tool 10, the pin 20 can be driven to slide along the detection channel 223 while the shoulder 22 abuts against the positioning surface 222 after the pin 20 enters the detection channel 223 through the opening of the detection channel 223. If the lower end of the tail 23 of the pin 20 abuts against the stop surface 122 so that the pin 20 cannot move above the detection surface 121, it means that the length of the tail 23 of the pin 20 exceeds the upper limit, i.e. the pin 20 is unqualified. If the lower end of the tail 23 of the pin 20 moves beyond the stop surface 122 and abuts against one end of the measuring rocker 310, it means that the length of the tail 23 of the pin 20 is within the machining tolerance range (i.e. less than the upper limit and greater than the lower limit), i.e. the pin 20 is qualified. At this time, the tail 23 of the pin 20 drives the measuring rocker 310 to rotate, which causes the micro switch 340 to open and the indicator light 350 to turn on. Thus, the user can confirm that the pin 20 is qualified. If the lower end of the tail 23 of the pin 20 moves beyond the measuring rocker 310, i.e. the lower end of the tail 23 of the pin 20 does not contact the measuring rocker 310 and the indicator light 350 does not turn on, it means that the length of the tail 23 of the pin 20 is less than the lower limit, i.e. the pin 20 is unqualified. Thus, the pin 20 can be conveniently and quickly detected.

[0062] Further, a plurality of the table blocks 400 are provided, each corresponding to a pin 20 of a different size specification. Thus, when the specification of the pin 20 to be detected by the detection tool changes, the position of the cantilever 220 can be calibrated by the corresponding table block. Thus, the use range of the detection tool can be improved, the use difficulty of the detection tool can be reduced, and the detection efficiency can be improved.

[0063] Further, the guide rail 211 is open at the upper end of the adjusting block 210, and the cantilever 220 can enter and exit through the upper end of the guide rail 211. Thus, when the cantilever 220 is worn, the cantilever 220 can be conveniently disassembled and replaced.

[0064] Further, the stop block 120 is fixed to the base 110 by bolts. Thus, when the detection surface 121 is worn, the stop block 120 can be conveniently disassembled and replaced. When the detection mechanism 300 fails, the stop block 120 can be conveniently removed for repair of the detection mechanism 300.

[0065] Further, the cantilever 220 and the stopper 120 are made of hard aluminum alloy or other suitable metal materials. Thus, the wear resistance of the cantilever 220 and the stopper 120 can be improved, and the service life of the measuring tool 10 can be prolonged.

[0066] Further, the indicator light 350 is a backlight plate installed on the outer surface of the base 110, so that the user can conveniently observe the on-off state of the indicator light 350.

[0067] Further, the detection mechanism 300 further comprises a device switch 360 installed on the outer surface of the base 110 and electrically connected with the micro switch 340 and the indicator light 350. After the device switch 360 is turned on, the measuring tool 10 can detect the pin 20, and the indicator light 350 can be controlled by the micro switch 340 to turn on or off. After the device switch 360 is turned off, the detection mechanism 300 is powered off, and the pin 20 cannot be detected.

[0068] Note that the above are only the preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and all belong to the protection scope of the present application.

Claims

1. A measuring tool, characterized in that A tail length of a pin is detected, comprising: a stopper, a flat detection surface is arranged on a surface of the stopper, and a detection port is arranged on the detection surface; a cantilever, the cantilever has two separate detection arms, a detection channel with an open end is formed between the two detection arms, the detection channel is located at a position corresponding to the detection port, a width of the detection channel is matched with a diameter of the tail of the pin, and surfaces of the two detection arms away from the detection surface are located on a same plane to form a positioning surface, the positioning surface is parallel to the detection surface; a detection mechanism, the detection mechanism has a measurement rocker, the measurement rocker is hinged to the stopper, one end of the measurement rocker is exposed from the detection surface through the detection port, and the detection mechanism gives a prompt when the measurement rocker rotates. A distance between the detection surface and the positioning surface corresponds to an upper limit size of the tail length of the pin, and a distance between the detection surface and the measurement rocker corresponds to a lower limit size of the tail length of the pin.

2. The measurement tool of claim 1, wherein, The cantilever and the stopper are slidingly connected in a direction perpendicular to the detection surface.

3. The measurement tool of claim 2, wherein, Further comprising: a counter surface block, one end of the counter surface block is used for abutting against the detection surface, and the other end is used for abutting against a surface of the cantilever on a side facing the detection surface, so that the distance between the detection surface and the positioning surface corresponds to the upper limit size of the tail length of the pin.

4. The measurement tool of claim 3, wherein, A plurality of counter surface blocks are arranged, and each counter surface block corresponds to a pin of a different size specification.

5. The measurement tool of claim 2, wherein, Further comprising: an adjusting block, the adjusting block is fixedly installed on the stopper and located at a position close to the detection port, a slide rail is arranged on a surface of the adjusting block on a side facing the detection port, an extension direction of the slide rail is perpendicular to the detection surface, and the cantilever is slidingly connected with the slide rail.

6. The measurement tool of claim 5, wherein, Further comprising: a fastening bolt, the fastening bolt is arranged on the adjusting block, and the cantilever is fastened with the adjusting block after being slid to a predetermined position on the slide rail.

7. The measurement tool of claim 6, wherein, A bottom of the slide rail is provided with a through-hole-shaped fastening hole extending along the extension direction of the slide rail, and the fastening bolt is threadedly connected with the cantilever through the fastening hole.

8. The measurement tool of claim 1, wherein, The two detection arms are arranged in parallel.

9. The measurement tool of any one of claims 1-8, wherein, The detection mechanism further comprises a micro switch and an indicator light, the micro switch is arranged at a position corresponding to the measurement rocker, the micro switch is driven to be turned on and off when the measurement rocker rotates, the micro switch is electrically connected with the indicator light, and the micro switch controls the indicator light to be bright or dark.

10. The measurement tool of claim 9, wherein, The detection mechanism further comprises: an elastic member, the elastic member is used to drive the measurement rocker to reset after the pin drives the measurement rocker to rotate.

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