Measuring scale

Abstract

The utility model provides a measuring scale, and relates to the field of measuring tools, the measuring scale comprises a connecting piece, a jacking assembly and a measuring assembly, the jacking assembly and the measuring assembly are arranged on the connecting piece, and the jacking assembly comprises a jacking piece; the measuring assembly comprises a measuring instrument and an elastic piece. The measuring instrument comprises a meter body and a measuring piece movably arranged on the meter body. The elastic piece is arranged on the measuring piece to provide elastic pre-tightening force for movement of the measuring piece; the abutting piece is used for abutting against one side of the workpiece to be measured, and the measuring piece is used for abutting against the other side of the workpiece to be measured so as to measure the length of the workpiece to be measured. The measuring scale provided by the utility model can accurately measure the length of a large-size workpiece, and is simple to operate and convenient to use.

Description

Technical Field

[0001] The present application relates to the field of measuring tools, and in particular to a measuring ruler. Background Art

[0002] During machining, it is usually necessary to measure the dimensions of the workpiece, such as the inner and outer diameters, length, etc., to ensure that the dimensions of the workpiece are qualified. For measuring small-sized workpieces, vernier calipers, micrometers, etc. are generally used for measurement. For measuring large-sized workpieces, special measuring tools need to be made or purchased.

[0003] In the related art, a tip is provided at one end of the ruler, and a dial indicator or micrometer is provided at the other end of the ruler, and the length is measured by pressing the tip and the dial against the measuring part of the workpiece.

[0004] However, due to the large size span of the workpiece, it is difficult to achieve consistency in the tightening force of the dial indicator and the center during the measurement operation, which affects the measurement accuracy. Utility Model Content

[0005] The present application provides a measuring ruler to solve the technical problem that the measurement accuracy of the existing measuring ruler is affected by inconsistent clamping force during the measurement of large-sized workpieces.

[0006] In order to achieve the above-mentioned object, the present application provides a measuring ruler, including a connecting member, a tightening assembly and a measuring assembly, wherein the tightening assembly and the measuring assembly are arranged on the connecting member, and the tightening assembly includes a tightening member;

[0007] The measuring assembly comprises a measuring instrument and an elastic member, wherein the measuring instrument comprises a meter body and a measuring member movably arranged on the meter body;

[0008] The elastic member is arranged on the measuring member to provide an elastic preload force for the movement of the measuring member;

[0009] The pressing member is used to abut against one side of the workpiece to be measured, and the measuring member is used to abut against the other side of the workpiece to be measured, so as to measure the length of the workpiece to be measured.

[0010] In a possible implementation, the elastic member is a compression spring, and the compression spring is sleeved on the measuring member;

[0011] One end of the compression spring abuts against the meter body, and the other end of the compression spring abuts against the measuring piece.

[0012] In a possible implementation, the tightening assembly further includes a first support member, the first support member includes a first mounting seat and a first cantilever connected to the first mounting seat, the first mounting seat is connected to the connecting member, and the tightening member is connected to the first cantilever;

[0013] The measuring assembly further comprises a second supporting member, the second supporting member comprises a second mounting seat and a second cantilever connected to the second mounting seat, the second mounting seat is connected to the connecting member, and the measuring instrument is connected to the second cantilever;

[0014] The second cantilever and the first cantilever are located on the same side of the connecting member.

[0015] In a possible implementation, at least one of the first mounting seat and the second mounting seat moves relative to the connecting member to adjust the distance between the pressing member and the measuring member;

[0016] A first limiting member is provided on one or both of the first mounting seat and the second mounting seat that move relative to the connecting member, so as to limit the movement of the first mounting seat or the second mounting seat.

[0017] In a possible implementation, the pressing member has a first protrusion and a second protrusion opposite to each other, the first protrusion faces the measuring member, and the second protrusion faces away from the measuring member;

[0018] The second cantilever is rotated relative to the second mounting seat so that the measuring piece faces toward or away from the first protrusion.

[0019] In a possible implementation, the second support member further includes a rotating shaft and an elastic locking member, the second mounting seat and the second cantilever are connected via the rotating shaft, and the second mounting seat moves axially along the rotating shaft relative to the second cantilever;

[0020] One end of the elastic locking member is in contact with the rotating shaft, and the other end of the elastic locking member is in contact with the second mounting seat or the second cantilever;

[0021] The second mounting seat has a first positioning surface, and the second cantilever has a second positioning surface matching the first positioning surface. When the second cantilever is rotated so that the measuring piece faces toward or away from the first protrusion, the first positioning surface cooperates and abuts against the second positioning surface, so that the second mounting seat and the second cantilever are elastically tightened by the elastic locking piece.

[0022] In a possible implementation, the pressing member moves relative to the length extension direction of the first cantilever, the measuring instrument moves relative to the length extension direction of the second cantilever, and the moving directions of the pressing member and the measuring instrument are parallel;

[0023] A second limiting member is provided on the first cantilever for limiting the movement of the pressing member;

[0024] A third limiting member is arranged on the second cantilever, and the third limiting member is used for limiting the movement of the measuring instrument.

[0025] In a possible implementation, a first slide groove is provided on the first cantilever along the moving direction of the pressing member, the pressing member is slidably arranged in the first slide groove, and the second limiting member passes through the first slide groove and abuts against the pressing member;

[0026] A second slide groove is arranged on the second cantilever along the moving direction of the measuring instrument, the measuring instrument is slidably arranged in the second slide groove, and the third limiting member passes through the second slide groove and abuts against the pressing member.

[0027] In a possible implementation, a third support member is further included, and the third support member is slidably connected to the connecting member, so that the connecting member abuts against the workpiece to be measured through the third support member.

[0028] In a possible implementation, the connecting member is a connecting rod, the third supporting member is a supporting block, the supporting block is sleeved on the connecting rod, and the supporting blocks are arranged on both sides of the tightening assembly and the measuring assembly.

[0029] The present application provides a measuring ruler, including a connecting piece, a tightening assembly and a measuring assembly. The tightening assembly and the measuring assembly are arranged on the connecting piece, the tightening assembly includes a tightening piece, the measuring assembly includes a measuring instrument and an elastic piece, the measuring instrument includes a body and a measuring piece movably arranged on the body, the elastic piece is arranged on the measuring piece to provide an elastic preload force for the movement of the measuring piece, during measurement, the tightening piece abuts against one side of the workpiece to be measured, and the measuring piece abuts against the other side of the workpiece to be measured, wherein the elastic preload force of the elastic piece drives the measuring ruler to move adaptively relative to the workpiece to be measured, so that the tightening forces of the tightening piece and the measuring piece on both sides of the workpiece to be measured are basically consistent, thereby accurately measuring the length of the workpiece to be measured. Therefore, the measuring ruler provided by the present application can realize accurate measurement of the length of large-sized workpieces, and is simple to operate and convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0031] Figure 1 A schematic diagram of the structure of a measuring ruler provided in an embodiment of the present application;

[0032] Figure 2 for Figure 1 Schematic diagram of the installation structure of the middle tightening assembly and the connecting piece;

[0033] Figure 3 for Figure 1 Schematic diagram of the installation structure of the measuring components and the connecting parts;

[0034] Figure 4 for Figure 3 Sectional view along section AA;

[0035] Figure 5 for Figure 1 Schematic diagram of the installation structure of the measuring instrument and the elastic member;

[0036] Figure 6 A schematic diagram of a use state of a measuring ruler provided in an embodiment of the present application;

[0037] Figure 7 A schematic diagram of another usage state of the measuring ruler provided in an embodiment of the present application.

[0038] Reference numerals:

[0039] 10: Workpiece to be tested;

[0040] 100: Connector;

[0041] 200: tightening assembly;

[0042] 210: tightening member;

[0043] 211: first protrusion;

[0044] 212: second protruding portion;

[0045] 220: first support member;

[0046] 221: first mounting seat;

[0047] 222: first cantilever;

[0048] 2221: first chute;

[0049] 223: first limiter;

[0050] 224: second limiting member;

[0051] 300: measurement component;

[0052] 310: measuring instruments;

[0053] 311: watch body;

[0054] 312: measuring piece;

[0055] 320: elastic member;

[0056] 330: second supporting member;

[0057] 331: second mounting seat;

[0058] 3311: first positioning surface;

[0059] 332: second cantilever;

[0060] 3321: second positioning surface;

[0061] 3322: Second chute;

[0062] 333: shaft;

[0063] 334: elastic locking member;

[0064] 335: third limiting member;

[0065] 400: The third supporting member.

[0066] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0067] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0068] As mentioned in the background technology section, large-sized workpieces have a larger span, such as annular parts with a diameter of 3m to 6m, or strip parts with a length of 3m to 6m. When measuring, it is difficult for the operator to grasp the tightening force of the center and the dial indicator. Sometimes the center is not even in place. The accuracy of the dial indicator and micrometer is relatively high, while the tightening force on the center has a greater impact on the length dimension, affecting the final measurement accuracy, which needs to be solved urgently.

[0069] In order to solve the above-mentioned problems existing in the existing measuring ruler when measuring large-sized workpieces, the present application provides a measuring ruler, including a connecting member, a clamping assembly and a measuring assembly. By arranging the clamping assembly and the measuring assembly on the connecting member, the clamping assembly includes a clamping member, the measuring assembly includes a measuring instrument and an elastic member, the measuring instrument includes a body and a measuring member movably arranged on the body, and the elastic member is arranged on the measuring member to provide an elastic preload force for the movement of the measuring member. During measurement, the clamping member abuts against one side of the workpiece to be measured, and the measuring member abuts against the other side of the workpiece to be measured, wherein the elastic preload force of the elastic member drives the measuring ruler to move adaptively relative to the workpiece to be measured, so that the clamping forces of the clamping member and the measuring member on both sides of the workpiece to be measured are basically consistent, thereby accurately measuring the length of the workpiece to be measured.

[0070] The technical solution of the present application will be described in detail below in conjunction with the accompanying drawings and several specific embodiments. It can be understood that the following embodiments can be combined or used alone.

[0071] like Figure 1-Figure 5As shown, this embodiment provides a measuring ruler, including a connecting member 100 , a tightening assembly 200 and a measuring assembly 300 . The tightening assembly 200 and the measuring assembly 300 are arranged on the connecting member 100 , and the tightening assembly 200 includes a tightening member 210 .

[0072] The measuring assembly 300 includes a measuring instrument 310 and an elastic member 320 . The measuring instrument 310 includes a body 311 and a measuring member 312 movably disposed on the body 311 .

[0073] The elastic member 320 is disposed on the measuring member 312 to provide an elastic preload force for the movement of the measuring member 312 .

[0074] The pressing member 210 is used to abut against one side of the workpiece 10 to be measured, and the measuring member 312 is used to abut against the other side of the workpiece 10 to be measured, so as to measure the length of the workpiece 10 to be measured.

[0075] In this embodiment, the connector 100 is used to provide an installation foundation for the jacking assembly 200 and the measuring assembly 300, and plays a connecting role. The connector 100 can be in the shape of a long rod, a long tube, a long strip, etc. It should be noted that in order to ensure the accuracy of the measured dimensions, the connector 100 should be made of a material with little or no bending deformation. In addition, in order to reduce its own weight, the connector 100 can be a hollow tubular structure made of high-strength materials such as aluminum alloy and titanium alloy.

[0076] The clamping assembly 200 is used to clamp one side of the workpiece 10 to be measured as a measurement reference. The clamping assembly 200 includes a clamping member 210, which can be directly connected to one side of the connecting member 100, or indirectly connected to one side of the connecting member 100 through other fasteners. It should be noted that when the clamping member 210 contacts the workpiece 10 to be measured, other parts of the clamping assembly 200 cannot contact the workpiece 10 to be measured and cause interference. Therefore, a protrusion for contacting the workpiece 10 to be measured can be provided on the clamping member 210.

[0077] The measuring assembly 300 is used to tighten the other side of the workpiece 10 to be measured, so as to measure the length between the workpiece 10 and the tightening member 210. The length also includes the outer diameter or inner diameter of the workpiece. The measuring assembly 300 includes a measuring instrument 310 and an elastic member 320, wherein the measuring instrument 310 is a dial indicator or a micrometer, and the measuring instrument 310 includes a body 311 and a measuring member 312. The body 311 can be directly connected to the other side of the connecting member 100, and the body 311 can also be indirectly connected to the other side of the connecting member 100 through other fasteners. The measuring member 312 is also the dial rod on the dial indicator or micrometer. When the measuring member 312 is pressed to move it, the pointer on the body 311 swings to display the moving value.

[0078] The elastic member 320 is used to provide elastic preload. The elastic member 320 can abut against the measuring member 312. When the measuring member 312 is pressed, a greater pressing force is required to move the measuring member 312 and the elastic member 320 together.

[0079] In a specific measurement, in one example, Figure 6 As shown, it is used to measure the inner hole on the workpiece 10 to be measured. First, the initial lengths of the pressing member 210 and the measuring member 312 are adjusted to the designed length of the workpiece, and the measuring instrument 310 is zeroed. Then, the part to be measured on the workpiece 10 to be measured is laid flat, and the connecting member 100 is placed horizontally on the workpiece 10 to be measured, so that the pressing member 210 is in contact with the inner wall of one side of the workpiece 10 to be measured, and the measuring member 312 is in contact with the inner wall of the other side of the workpiece 10 to be measured. The measuring ruler is loosened, and the elastic pre-tightening force of the elastic member 320 drives the measuring ruler to move adaptively relative to the workpiece 10 to be measured, such as along Figure 6 Move in the opposite direction of the middle X so that the clamping force of the clamping member 210 and the measuring member 312 are basically consistent with the inner walls on both sides of the workpiece 10 to be measured. If the reading on the measuring instrument 310 changes, the initial length between the clamping member 210 and the measuring member 312 minus the reading on the measuring instrument 310 is the actual length of the inner hole, indicating that there is still machining allowance for the inner hole. If the count on the measuring instrument 310 does not change, it means that the size of the inner hole has been processed in place.

[0080] In another example, Figure 7 As shown, it is used to measure the periphery of the workpiece 10 to be measured. Similarly, the initial lengths of the pressing member 210 and the measuring member 312 are first adjusted to the designed length of the workpiece, and the measuring instrument 310 is zeroed. Then, the part to be measured on the workpiece 10 to be measured is laid flat, and the connecting member 100 is placed horizontally on the workpiece 10 to be measured, so that the pressing member 210 is in contact with the outer wall of one side of the workpiece 10 to be measured, and the measuring member 312 is in contact with the outer wall of the other side of the workpiece 10 to be measured, and the measuring ruler is loosened. The elastic pre-tightening force of the elastic member 320 drives the measuring ruler to move adaptively relative to the workpiece 10 to be measured, such as along Figure 7 Move in the positive direction of X in the middle so that the clamping force of the clamping member 210 and the measuring member 312 are basically consistent with the clamping force of the inner walls on both sides of the workpiece 10 to be measured. If the reading on the measuring instrument 310 changes, the initial length between the clamping member 210 and the measuring member 312 plus the reading on the measuring instrument 310 is the actual length dimension of the periphery, indicating that there is still processing allowance for the periphery. If the count on the measuring instrument 310 does not change, it means that the periphery size has been processed in place.

[0081] The initial length between the clamping member 210 and the measuring member 312 can be measured by a length measuring instrument, or a scale can be set on the connecting member 100 to quickly calculate the measured dimension value. When measuring the outer diameter or inner diameter of the annular workpiece 10 to be measured, the clamping position of the clamping member 210 and the measuring position of the measuring member 312 can be synchronously moved to measure several points to find the maximum outer diameter or the minimum inner diameter.

[0082] It can be understood that, compared with the prior art in which a hand-held measuring ruler is used to tighten the two sides of the workpiece 10 to be measured, the measuring ruler provided in the present embodiment, under the action of the elastic pre-tightening force of the elastic member 320 to adaptively move and adjust the measuring ruler, makes the tightening force of the tightening member 210 and the measuring member 312 basically consistent with the tightening force on both sides of the workpiece 10 to be measured, thereby avoiding the situation of inconsistent tightening force caused by hand-held tightening, and can achieve accurate measurement of the length of large-sized workpieces, with simple operation and easy use.

[0083] It should be noted that the elastic preload force of the elastic member 320 should be greater than the friction resistance between the measuring ruler and the workpiece 10 to ensure that when the measuring ruler is loosened, the elastic preload force of the elastic member 320 can drive the measuring ruler to move adaptively.

[0084] Therefore, the measuring ruler provided in this embodiment includes a connecting member 100, a clamping assembly 200 and a measuring assembly 300. The clamping assembly 200 and the measuring assembly 300 are arranged on the connecting member 100, the clamping assembly 200 includes a clamping member 210, the measuring assembly 300 includes a measuring instrument 310 and an elastic member 320, the measuring instrument 310 includes a body 311 and a measuring member 312 movably arranged on the body 311, the elastic member 320 is arranged on the measuring member 312 to provide an elastic preload force for the movement of the measuring member 312, during measurement, the clamping member 210 abuts against one side of the workpiece 10 to be measured, and the measuring member 312 abuts against the other side of the workpiece 10 to be measured, wherein the elastic preload force of the elastic member 320 drives the measuring ruler to move adaptively relative to the workpiece 10 to be measured, so that the clamping forces of the clamping member 210 and the measuring member 312 on both sides of the workpiece 10 to be measured are substantially consistent, thereby accurately measuring the length of the workpiece 10 to be measured.

[0085] In one possible design, reference Figure 5 As shown, the elastic member 320 is a compression spring, which is sleeved on the measuring member 312. One end of the compression spring abuts against the watch body 311, and the other end of the compression spring abuts against the measuring member 312. When the measuring member 312 is in the initial state, the compression spring is also in an uncompressed state. Only when the measuring member 312 is pressed to move, the compression spring can be compressed.

[0086] Specifically, continue as Figure 5As shown, the meter body 311 has a rod sleeve, the meter rod is inserted into the rod sleeve, the meter rod moves relative to the rod sleeve, and a probe is provided on the end of the meter rod away from the rod sleeve, and the periphery of the probe is larger than the diameter of the meter rod. A compression spring is sleeved on the meter rod, one end of the compression spring abuts against the end of the rod sleeve, and one end of the compression spring abuts against the probe.

[0087] Of course, the elastic member 320 may also be replaced by other elastic components, as long as they can provide sufficient elastic pre-tightening force for the measuring member 312, and no excessive restrictions are made in this embodiment.

[0088] In order to better adapt to the measurement of the part far from the end of the workpiece 10 to be measured, combined with Figure 1-Figure 3 As shown, in this embodiment, the jacking assembly 200 further includes a first support member 220, the first support member 220 includes a first mounting seat 221 and a first cantilever 222 connected to the first mounting seat 221, the first mounting seat 221 is connected to the connecting member 100, and the jacking member 210 is connected to the first cantilever 222. The measuring assembly 300 further includes a second support member 330, the second support member 330 includes a second mounting seat 331 and a second cantilever 332 connected to the second mounting seat 331, the second mounting seat 331 is connected to the connecting member 100, and the measuring instrument 310 is connected to the second cantilever 332. The second cantilever 332 and the first cantilever 222 are located on the same side of the connecting member 100.

[0089] In this way, when the connecting member 100 is placed at the end of the workpiece 10 to be measured, the distance between the clamping member 210 and the end of the workpiece 10 to be measured is lengthened by the first cantilever 222, and at the same time, the distance between the measuring instrument 310 and the end of the workpiece 10 to be measured is lengthened by the second cantilever 332, so that the part farther from the end can be measured.

[0090] Furthermore, if Figure 1-Figure 3 As shown, in this embodiment, at least one of the first mounting seat 221 and the second mounting seat 331 moves relative to the connecting member 100 to adjust the distance between the pressing member 210 and the measuring member 312. A first limiting member 223 is provided on one or both of the first mounting seat 221 and the second mounting seat 331 that moves relative to the connecting member 100, for limiting the movement of the first mounting seat 221 or the second mounting seat 331.

[0091] In this way, by adjusting the distance between the pressing member 210 and the measuring member 312, the measurement of workpieces of different sizes can be adapted within a certain range, and the application range is wider. The first stopper 223 limits the movement of the first mounting seat 221 or the second mounting seat 331, so that during the measurement process, the first mounting seat 221 is prevented from moving relative to the second mounting seat 331, thereby playing a locking role.

[0092] For example, Figure 2As shown, the connecting member 100 is a connecting rod, the first mounting seat 221 is sleeved on the connecting rod and moves relative to the connecting rod, and the first limiting member 223 is a locking bolt, which is installed on the first mounting seat 221 through a thread and abuts against the pressing member 210. The pressing member 210 is locked or loosened by turning the locking bolt forward and backward.

[0093] Or, if Figure 3 As shown, the connecting member 100 is a connecting rod, the second mounting seat 331 is sleeved on the connecting rod and moves relative to the connecting rod, and the first limiter 223 is a locking bolt, which is threadedly installed on the second mounting seat 331 and abuts against the measuring instrument 310. The measuring instrument 310 is locked or loosened by turning the locking bolt forward and backward.

[0094] Alternatively, both the first mounting seat 221 and the second mounting seat 331 move relative to the connecting member 100, and the first limiting member 223 is disposed on the first mounting seat 221 and the second mounting seat 331. The connection structure for the first mounting seat 221 and the second mounting seat 331 to move relative to the connecting member 100 can be replaced by other types of moving structures. Moreover, the limiting structure for the first limiting member 223 to limit the first mounting seat 221 and the second mounting seat 331 on the connecting member 100 can also be replaced by other types of limiting structures, which are not excessively limited in this embodiment.

[0095] Furthermore, if Figure 1-Figure 4 As shown, in this embodiment, the pressing member 210 has a first protrusion 211 and a second protrusion 212 opposite to each other, the first protrusion 211 faces the measuring member 312, and the second protrusion 212 faces away from the measuring member 312. The second cantilever 332 rotates relative to the second mounting seat 331 to make the measuring member 312 face toward or away from the first protrusion 211. This arrangement facilitates rapid switching when measuring the inner hole and the outer periphery.

[0096] In one example, Figure 7 As shown, when the measuring piece 312 faces the first protrusion 211, the first protrusion 211 abuts against the outer wall of one side of the workpiece 10 to be measured, and the measuring piece 312 abuts against the outer wall of the other side of the workpiece 10 to be measured, which facilitates the measurement of the outer dimensions of the workpiece 10 to be measured.

[0097] In another example, the second cantilever 332 is rotated around the Y axis to make the measuring member 312 away from the first protrusion 211. Figure 6 As shown, the second protrusion 212 abuts against the inner wall of one side of the workpiece 10 to be measured, and the measuring piece 312 abuts against the inner wall of the other side of the workpiece 10 to be measured, so that it is convenient to measure the inner hole size on the workpiece 10 to be measured.

[0098] Furthermore, if Figure 3-Figure 4 As shown, in this embodiment, the second support member 330 may further include a rotating shaft 333 and an elastic locking member 334. The second mounting seat 331 and the second cantilever 332 are connected by the rotating shaft 333, and the second mounting seat 331 moves along the axial direction of the rotating shaft 333 relative to the second cantilever 332. One end of the elastic locking member 334 abuts against the rotating shaft 333, and the other end of the elastic locking member 334 abuts against the second mounting seat 331 or the second cantilever 332. The second mounting seat 331 has a first positioning surface 3311, and the second cantilever 332 has a second positioning surface 3321 matching the first positioning surface 3311. When the second cantilever 332 is rotated to make the measuring member 312 face toward or away from the first protruding portion 211, the first positioning surface 3311 and the second positioning surface 3321 cooperate and abut, so that the second mounting seat 331 and the second cantilever 332 are elastically tightened by the elastic locking member 334.

[0099] This arrangement facilitates quick and accurate positioning after the second cantilever 332 is rotated and adjusted. Specifically, the second mounting seat 331 and the second cantilever 332 are connected by a rotating shaft 333, the axis of the rotating shaft 333 is perpendicular to the line between the measuring member 312 and the first protruding portion 211, and the elastic locking member 334 is a compression spring, which is sleeved on the rotating shaft 333, one end of the compression spring abuts against the rotating shaft 333, and the other end of the compression spring abuts against the second mounting seat 331. The lower end of the second mounting seat 331 has a first positioning surface 3311 in an inverted V shape, and correspondingly, the upper end of the second cantilever 332 also has a second positioning surface 3321 in an inverted V shape.

[0100] When the measuring member 312 faces the first protrusion 211, the first positioning surface 3311 matches the second positioning surface 3321, and the first positioning surface 3311 and the second positioning surface 3321 are matched and positioned, and the compression spring is used to tighten. Figure 4 When the second cantilever 332 is rotated 180 degrees along the middle Y axis so that the measuring member 312 is away from the first protrusion 211, the second cantilever 332 can be loosened and positioned by the first positioning surface 3311 and the second positioning surface 3321, and tightened by the compression spring. In this way, the rotation of the second cantilever 332 can be positioned and locked without loosening the measuring instrument 310, and the positioning performance of the V surface is better.

[0101] Among them, the first positioning surface 3311 and the second positioning surface 3321 can also be V-shaped, or other shapes, as long as the first positioning surface 3311 and the second positioning surface 3321 can still cooperate for positioning after the second cantilever 332 is extended to 180 degrees. There are no excessive restrictions in this embodiment.

[0102] In order to flexibly adjust the measuring position of the workpiece 10 away from the end, such as Figure 2-Figure 3 As shown, in this embodiment, the tensioning member 210 is arranged relative to the length extension direction of the first cantilever 222 (i.e., along the Figure 2 The measuring instrument 310 moves relative to the length extension direction of the second cantilever 332 (i.e., along the Figure 3 The first cantilever 222 is provided with a second stopper 224 for limiting the movement of the push-up member 210. The second cantilever 332 is provided with a third stopper 335 for limiting the movement of the measuring instrument 310.

[0103] In this way, the top tightening member 210 is moved along Figure 2 After the positive and negative directions of the middle Y axis are adjusted to a suitable position, the pressing member 210 is locked by the second stopper 224. Figure 3 After the positive and negative directions of the middle Y-axis are adjusted to a suitable position, the measuring instrument 310 is locked by the third limit member 335, thereby realizing flexible adjustment of the measuring position away from the end of the workpiece 10 to be measured.

[0104] For example, continue as Figure 2-Figure 3 As shown, in this embodiment, a first slide groove 2221 is provided on the first cantilever 222 along the moving direction of the jacking member 210, the jacking member 210 is slidably disposed in the first slide groove 2221, and the second stopper 224 penetrates the first slide groove 2221 and abuts against the jacking member 210. A second slide groove 3322 is provided on the second cantilever 332 along the moving direction of the measuring instrument 310, the measuring instrument 310 is slidably disposed in the second slide groove 3322, and the third stopper 335 penetrates the second slide groove 3322 and abuts against the jacking member 210.

[0105] Among them, Figure 2 As shown, the second stopper 224 can be a second locking bolt, which is screwed on the first cantilever 222 and penetrates the first slide groove 2221. By screwing the second locking bolt, the top member 210 can be locked or loosened. In addition, a plurality of second locking bolts can be arranged at intervals along the extension direction of the first cantilever 222, so that when the top member 210 slides to a suitable position, the top member 210 can be locked by second locking bolts at different positions.

[0106] Correspondingly, such as Figure 3As shown, the third stopper 335 can be a third locking bolt, which is screwed on the second cantilever 332 and penetrates the second slide groove 3322. The measuring instrument 310 can be locked or loosened by screwing the third locking bolt. In addition, a plurality of third locking bolts can be arranged at intervals along the extension direction of the second cantilever 332, so that when the measuring instrument 310 slides to a suitable position, the measuring instrument 310 can be locked by the third locking bolts at different positions. The measuring instrument 310 can be directly slidably arranged in the second slide groove 3322, or the measuring instrument 310 can be indirectly slidably arranged in the second slide groove 3322 through other components.

[0107] Of course, the sliding structure between the jacking member 210 and the first cantilever 222 and the sliding structure between the measuring instrument 310 and the second cantilever 332 can also be replaced by other sliding structures. The locking structure of the second stopper 224 on the jacking member 210 and the locking structure of the third stopper 335 on the measuring instrument 310 can also be replaced by other locking structures. In this regard, there is no excessive restriction in this embodiment.

[0108] Alternatively, if Figure 1-Figure 5 As shown, in this embodiment, a third support member 400 may be further included, and the third support member 400 is slidably connected to the connecting member 100, so that the connecting member 100 abuts against the workpiece 10 to be measured through the third support member 400. In this way, the connecting member 100 is ensured to move and adjust smoothly on the workpiece 10 to be measured.

[0109] The third support member 400 may be disposed in the middle of the connecting member 100 , or may be disposed on both sides of the connecting member 100 .

[0110] Specifically, in this embodiment, the connecting member 100 is a connecting rod, the third supporting member 400 is a supporting block, the supporting block is sleeved on the connecting rod, and supporting blocks are provided on both sides of the tightening assembly 200 and the measuring assembly 300. In this way, the supporting block can slide on the connecting rod to provide sliding support for the connecting rod. A low-viscosity lubricant can also be applied within the sliding range of the supporting block to reduce the friction resistance between the supporting block and the connecting rod.

[0111] In one example, Figure 6 As shown, when measuring the inner hole on the workpiece 10 to be measured, two support blocks that are separated from each other are respectively mounted on both sides of the upper end of the workpiece 10 to ensure that the connecting member 100 moves horizontally.

[0112] In another example, Figure 7 As shown, when measuring the periphery of the workpiece 10 to be measured, two adjacent support blocks are respectively mounted on both sides of the upper end of the workpiece 10 to ensure that the connecting member 100 moves horizontally.

[0113] It is worth noting that if Figure 2-Figure 3 As shown, a supporting convex strip is provided at the bottom of the supporting block, and the supporting convex strips at the bottom of each supporting block are consistent, ensuring the flatness of the contact with the upper end of the workpiece 10 to be measured, so as to ensure that the connecting member 100 can move smoothly.

[0114] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0115] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A measuring ruler, characterized in that: It comprises a connecting piece, a tightening assembly and a measuring assembly, wherein the tightening assembly and the measuring assembly are arranged on the connecting piece, and the tightening assembly comprises a tightening piece; The measuring assembly comprises a measuring instrument and an elastic member, wherein the measuring instrument comprises a body and a measuring member movably arranged on the body; The elastic member is arranged on the measuring member to provide an elastic preload force for the movement of the measuring member; The pressing member is used to abut against one side of the workpiece to be measured, and the measuring member is used to abut against the other side of the workpiece to be measured, so as to measure the length of the workpiece to be measured.

2. The measuring ruler according to claim 1, characterized in that: The elastic member is a compression spring, and the compression spring is sleeved on the measuring member; One end of the compression spring abuts against the watch body, and the other end of the compression spring abuts against the measuring piece.

3. The measuring ruler according to claim 1, characterized in that: The tightening assembly further includes a first support member, the first support member includes a first mounting seat and a first cantilever connected to the first mounting seat, the first mounting seat is connected to the connecting member, and the tightening member is connected to the first cantilever; The measuring assembly further comprises a second supporting member, the second supporting member comprises a second mounting seat and a second cantilever connected to the second mounting seat, the second mounting seat is connected to the connecting member, and the measuring instrument is connected to the second cantilever; The second cantilever and the first cantilever are located on the same side of the connecting member.

4. The measuring ruler according to claim 3, characterized in that: At least one of the first mounting seat and the second mounting seat moves relative to the connecting member to adjust the distance between the pressing member and the measuring member; A first limiting member is provided on one or both of the first mounting seat and the second mounting seat that moves relative to the connecting member, so as to limit the movement of the first mounting seat or the second mounting seat.

5. The measuring ruler according to claim 3, characterized in that: The pressing member has a first protrusion and a second protrusion opposite to each other, the first protrusion faces the measuring member, and the second protrusion faces away from the measuring member; The second cantilever is rotated relative to the second mounting seat so that the measuring member is directed toward or away from the first protrusion.

6. The measuring ruler according to claim 5, characterized in that: The second support member further includes a rotating shaft and an elastic locking member, the second mounting seat and the second cantilever are connected via the rotating shaft, and the second mounting seat moves axially along the rotating shaft relative to the second cantilever; One end of the elastic locking member abuts against the rotating shaft, and the other end of the elastic locking member abuts against the second mounting seat or the second cantilever; The second mounting seat has a first positioning surface, and the second cantilever has a second positioning surface matching the first positioning surface. When the second cantilever is rotated so that the measuring piece faces toward or away from the first protrusion, the first positioning surface cooperates and abuts against the second positioning surface, so that the second mounting seat and the second cantilever are elastically tightened by the elastic locking piece.

7. The measuring ruler according to claim 3, characterized in that: The pressing member moves relative to the length extension direction of the first cantilever, the measuring instrument moves relative to the length extension direction of the second cantilever, and the moving directions of the pressing member and the measuring instrument are parallel; A second limiting member is provided on the first cantilever for limiting the movement of the pressing member; The second cantilever is provided with a third limiter, and the third limiter is used to limit the movement of the measuring instrument.

8. The measuring ruler according to claim 7, characterized in that: A first sliding groove is provided on the first cantilever along the moving direction of the pressing member, the pressing member is slidably arranged in the first sliding groove, and the second limiting member passes through the first sliding groove and abuts against the pressing member; A second slide groove is arranged on the second cantilever along the moving direction of the measuring instrument, the measuring instrument is slidably arranged in the second slide groove, and the third limiting member passes through the second slide groove and abuts against the pressing member.

9. The measuring ruler according to any one of claims 1 to 8, characterized in that: It also includes a third supporting member, which is slidably connected to the connecting member so that the connecting member abuts against the workpiece to be measured through the third supporting member.

10. The measuring ruler according to claim 9, characterized in that: The connecting member is a connecting rod, the third supporting member is a supporting block, the supporting block is sleeved on the connecting rod, and the supporting blocks are arranged on both sides of the tightening assembly and the measuring assembly.

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