Angle measuring device

Abstract

The utility model relates to an angle measuring device, and relates to the technical field of angle measuring equipment. The protractor comprises a first measuring scale, one end of the first measuring scale is provided with a rotating shaft, and the axial direction of the rotating shaft is perpendicular to the extension direction of the first measuring scale; one end of the second measuring scale is rotationally connected with the rotating shaft, and the rotating direction of the second measuring scale is perpendicular to the axial direction of the rotating shaft; the center of the protractor is rotationally connected with the rotating shaft; at least part of the limiting assembly is fixedly connected with the second measuring scale, and the limiting assembly abuts against the rotating shaft so as to limit the rotation of the rotating shaft in the axial direction. According to the angle measurement device provided by the embodiment of the invention, the rotation shaft can be effectively prevented from moving due to external shaking or human factors in the measurement process through the limiting effect of the limiting assembly on the rotation shaft, so that the accuracy of angle measurement is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to angle measuring equipment technical field, especially to a kind of angle measuring device. BACKGROUND

[0002] Protractor is a drawing tool, common material is plastic or iron, can draw the angle needed according to need, and some need to adjust angle to use instrument, also need protractor to measure the angle needed to rotate, it is difficult to measure the angle needed to rotate with protractor, and protractor needs artificial support when measuring angle, and keep still, but in the process of artificial support, it is easy to affect subsequent reading due to external shaking, cause the data of measurement to be prone to error, reduce the practicability of device. UTILITY MODEL CONTENT

[0003] The utility model provides a kind of angle measuring device, the limiting effect of positioner to rotating shaft, effectively avoid the rotating shaft movement caused by external shaking or human factor in the process of measurement, to improve the accuracy of angle measurement.

[0004] The application embodiment provides a protractor, comprising: a first measuring scale, one end of the first measuring scale is provided with a rotating shaft, the axial direction of the rotating shaft is perpendicular to the extension direction of the first measuring scale; a second measuring scale, one end of the second measuring scale is rotatably connected with the rotating shaft, and the rotating direction of the second measuring scale is perpendicular to the axial direction of the rotating shaft; a protractor, the center of the protractor is rotatably connected with the rotating shaft; and a limiting assembly, at least part of the limiting assembly is fixedly connected with the second measuring scale, and the limiting assembly is in abutment with the rotating shaft to limit the rotation of the rotating shaft in the axial direction.

[0005] According to the foregoing embodiment of the present application, the limiting assembly includes a first state and a second state, and the limiting assembly can be switched between the first state and the second state. In the first state, the limiting assembly is in abutment with the circumferential side wall of the rotating shaft, and the limiting assembly limits the axial rotation of the rotating shaft. In the second state, the limiting assembly is separated from the circumferential side wall of the rotating shaft, and the limiting assembly releases the limiting of the axial rotation of the rotating shaft.

[0006] According to any one of the foregoing embodiments of the present application, the limiting assembly includes: a limiting member, which can move towards or away from the circumferential side wall of the rotating shaft along the radial direction of the rotating shaft; a fixed plate, which is fixedly connected with the second measuring scale; a connecting rod, which is movably connected with the fixed plate along the radial direction of the rotating shaft, one end of the connecting rod is connected with the limiting member, and the other end of the connecting rod is connected with the fixed plate; and a first elastic return member, which is sleeved on the connecting rod, and the first elastic return member is arranged between the limiting member and the fixed plate, one end of the first elastic return member along the length direction thereof is connected with the limiting member, and the other end thereof is connected with the fixed plate.

[0007] According to any one of the preceding embodiments of the application, the limiting piece comprises a limiting surface, the limiting surface is arc-shaped, and the limiting surface is identical in shape to at least part of the circumferential side wall of the rotating shaft.

[0008] According to any one of the preceding embodiments of the application, the limiting piece further comprises a plurality of limiting protrusions, and the plurality of limiting protrusions are arranged on the limiting surface.

[0009] According to any one of the preceding embodiments of the application, the plurality of limiting protrusions are arranged in sequence along the first direction, and each limiting protrusion extends along the axial direction of the rotating shaft.

[0010] According to any one of the preceding embodiments of the application, the first measuring scale is provided with a first fixing assembly, and the second measuring scale is provided with a second fixing assembly.

[0011] According to any one of the preceding embodiments of the application, the first fixing assembly comprises a first suction disc, a supporting rod, and a second elastic reset piece, the supporting rod is arranged at one end of the first measuring scale away from the protractor, the supporting rod is slidingly connected to the first measuring scale along the axial direction of the rotating shaft, the first suction disc is connected to one end of the supporting rod, the second elastic reset piece is sleeved on the supporting rod, one end of the second elastic reset piece is connected to the supporting rod, and the other end of the second elastic reset piece is connected to the first measuring scale, the surface of the first measuring scale is provided with a recessed portion formed by being recessed along the axial direction of the rotating shaft, and the first suction disc is arranged in the recessed portion; and / or the second fixing assembly comprises a plurality of second suction discs, and the plurality of second suction discs are arranged in sequence and at intervals along the extension direction of the second measuring scale.

[0012] According to any one of the preceding embodiments of the application, the protractor is provided with a pointer, one end of the pointer is fixedly connected to the rotating shaft, and the pointer is parallel to the first measuring scale.

[0013] According to any one of the preceding embodiments of the application, one end of the second measuring scale close to the protractor is further provided with a limiting plate, the limiting plate is fixedly connected to the second measuring scale, and the extension direction of the limiting plate is consistent with the extension direction of the second measuring scale.

[0014] According to the angle measuring device in the embodiment of the application, when in use, the second measuring scale is rotated, so that the second measuring scale can rotate relative to the first measuring scale in a plane perpendicular to the axial direction of the rotating shaft, and then the user measures the rotating angle of the second measuring scale relative to the first measuring scale by using the protractor to measure different rotating angles of the detected object. Due to the fixing of at least part of the limiting assembly to the second measuring scale and the abutment of the limiting assembly to the rotating shaft, when the angle needs to be measured, the second measuring scale can be rotated relative to the first measuring scale by external force, and when the measured angle of the protractor needs to be read, the second measuring scale is no longer subjected to the rotating force, the rotating shaft is limited in the axial direction under the limiting action of the limiting assembly, the movement of the rotating shaft caused by external shaking or human factors during reading is effectively avoided, the error caused by manual support of the protractor is reduced, the measurement data is more accurate and reliable, and the accuracy of the angle measuring device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] In the following, the utility model will be described in more detail based on the embodiments and with reference to the drawings.

[0016] Figure 1 is a structural schematic view of the angle measuring device in an embodiment of the application;

[0017] Figure 2 is a structural schematic view of the limiting assembly in the angle measuring device in the previous embodiment of the application;

[0018] Figure 3 is a structural schematic view of the angle measuring device in another view in an embodiment of the application;

[0019] Figure 4 is a structural schematic view of the first fixing assembly in the angle measuring device in the previous embodiment of the application.

[0020] Reference signs:

[0021] 100 - knife switch opening and closing assembly; 10 - input shaft; 20 - output shaft; 30 - speed reduction transmission assembly; 31 - driving gear; 32 - driven gear; 33 - transmission gear set; 331 - first gear set; 331a - first gear; 331b - second gear; 332 - second gear set; 332a - third gear; 332b - fourth gear;

[0022] 200 - connecting sleeve; 300 - shell; 400 - ratchet limiting assembly; 500 - lifting assembly; 600 - rotating handle. DETAILED DESCRIPTION

[0023] The utility model will be further described in combination with the drawings.

[0024] The utility model provides an angle measuring device, can limit the function of assembly to the rotation axis, effectively avoid the rotation axis movement caused by outside shaking or artificial factor in the measuring process, thereby improve the accuracy of angle measurement.

[0025] Figure 1 It is the structural schematic diagram of angle measuring device in an embodiment of the application. Figure 1 As shown in the application embodiment provides a kind of angle measuring device 1000.The angle measuring device 1000 includes first measuring scale 100, second measuring scale 200, protractor 300 and limit assembly 400.The one end of first measuring scale 100 is provided with rotation axis 110, and the axial direction of rotation axis 110 is perpendicular to the extension direction of first measuring scale 100.The one end of second measuring scale 200 is rotationally connected with rotation axis 110.The rotation direction of second measuring scale 200 is perpendicular to the axial direction of rotation axis 110.The center of protractor 300 is rotationally connected with rotation axis 110.At least part of limit assembly 400 is fixedly connected with second measuring scale 200.Limit assembly 400 is abutted with rotation axis 110, to limit the rotation of rotation axis 110 in axial direction.

[0026] According to the angle measuring device 1000 of the application embodiment, when using, by rotating second measuring scale 200, so that second measuring scale 200 can be rotated in the plane perpendicular to the axial direction of rotation axis 110 relative to first measuring scale 100, and then make the user measure the rotation angle of second measuring scale 200 relative to first measuring scale 100 by protractor 300 to measure the different rotation angle of the detected object.Due to limit assembly 400, at least part of which is fixedly connected with second measuring scale 200, and is abutted with rotation axis 110, when angle needs to be measured, second measuring scale 200 can be rotated relative to first measuring scale 100 by external force, when the reading of the measurement angle of protractor 300 needs to be read, no longer exerting the force on second measuring scale 200 to make it rotate, and rotation axis 110 is limited in the limiting action of limit assembly 400, to limit the rotation of rotation axis 110 in axial direction, effectively avoid the rotation axis 110 movement caused by outside shaking or artificial factor in the reading process, reduce the error produced by artificial support protractor 300, make the measurement data more accurate and reliable, thereby improve the accuracy and stability of measurement, and enhance the practicability of angle measuring device 1000.

[0027] As Figure 1As shown, in some embodiments, the limiting component 400 includes a first state and a second state, and the limiting component 400 can switch between the first state and the second state. In the first state, the limiting component 400 abuts against the circumferential sidewall of the rotating shaft 110, and the limiting component 400 limits the axial rotation of the rotating shaft 110. In the second state, the limiting component 400 separates from the circumferential sidewall of the rotating shaft 110, and the limiting component 400 releases the limitation on the axial rotation of the rotating shaft 110.

[0028] In this embodiment, when the limiting component 400 is in the first state, it abuts against the circumferential sidewall of the rotating shaft 110, restricting the axial rotation of the rotating shaft 110 and preventing it from rotating freely, thus facilitating the operator's reading of the protractor 300. When the limiting component 400 is in the second state, it separates from the circumferential sidewall of the rotating shaft 110, releasing the restriction on the axial rotation of the rotating shaft 110, allowing it to rotate freely, thus facilitating angle measurement. The operator can adjust the switching between the first and second states of the limiting component 400 as needed, achieving effective control over the axial rotation of the rotating shaft 110, simplifying the operation process, reducing operational difficulty, and improving work efficiency.

[0029] like Figure 1 As shown, in some embodiments, the protractor 300 is provided with a pointer 310, one end of which is fixedly connected to the rotating shaft 110, and the pointer 310 is parallel to the first measuring ruler 100, so as to facilitate the reading of the measured angle and ensure the accuracy of the measurement.

[0030] like Figure 2 As shown, in some embodiments, the limiting assembly 400 includes a limiting member 410, a fixing plate 420, a connecting rod 430, and a first elastic reset member 440. The limiting member 410 is movable radially toward or away from the circumferential sidewall of the rotating shaft 110. The fixing plate 420 is fixedly connected to the second measuring scale 200. The connecting rod 430 is movably connected to the fixing plate 420 radially along the rotating shaft 110. One end of the connecting rod 430 is connected to the limiting member 410, and the other end is connected to the fixing plate 420. The first elastic reset member 440 is sleeved on the connecting rod 430 and is disposed between the limiting member 410 and the fixing plate 420. One end of the first elastic reset member 440 along its own length direction is connected to the limiting member 410, and the other end is connected to the fixing plate 420.

[0031] In the embodiment, the fixed plate 420 is fixedly connected with the second measuring scale 200, providing a stable support platform for the limiting assembly 400. The connecting rod 430 is movably connected with the fixed plate 420 along the radial direction of the rotating shaft 110, realizing that the limiting part 410 can move along the radial direction of the rotating shaft 110 to approach or move away from the circumferential side wall of the rotating shaft 110 in the radial direction, so as to limit and release the rotating shaft 110. The limiting assembly 400 can realize accurate control of the axial rotation of the rotating shaft 110, ensuring that the rotating shaft 110 can be firmly locked when needed, and can freely rotate when needed.

[0032] When the limiting assembly 400 is in the initial state without external force, the limiting part 410 is pushed to the circumferential side wall of the rotating shaft 110 due to the elastic force of the first elastic reset part 440 (such as a spring), forming close contact with the rotating shaft 110. At this time, the limiting part 410 is in the "locked" state, limiting the axial rotation of the rotating shaft 110. When it is needed to unlock the rotating shaft 110 to allow it to rotate, external operation (such as manual pushing, mechanical driving, etc.) acts on the limiting part 410 or the connecting rod 430 to overcome the elastic force of the first elastic reset part 440, so that the limiting part 410 moves away from the rotating shaft 110 along the radial direction of the rotating shaft 110. With the separation of the limiting part 410 and the circumferential side wall of the rotating shaft 110, the axial rotation limitation of the rotating shaft 110 is released, and the rotating shaft 110 can freely rotate. When the rotating shaft 110 needs to be locked again, the external operation stops or reversely acts on the limiting part 410 or the connecting rod 430. Under the action of the elastic force of the first elastic reset part 440, the limiting part 410 moves along the radial direction of the rotating shaft 110 to approach the rotating shaft 110, until it re-contacts with the circumferential side wall of the rotating shaft 110, and the limiting part 410 is in the "locked" state again, limiting the axial rotation of the rotating shaft 110. The operation process is convenient and efficient.

[0033] As shown in Figure 2 In some embodiments, the limiting part 410 includes a limiting surface 411. The limiting surface 411 is arc-shaped, and the shape of the limiting surface 411 is the same as at least part of the circumferential side wall of the rotating shaft 110.

[0034] In the embodiment, the limiting action of the limiting part 410 on the rotating shaft 110 is realized by the friction between the limiting surface 411 and the circumferential side wall of the rotating shaft 110, and the size of the friction depends on the contact area and the friction coefficient. The arc-shaped design of the limiting surface 411 is the same as at least part of the shape of the circumferential side wall of the rotating shaft 110, which improves the limiting accuracy and increases the contact area between the limiting surface 411 and the circumferential side wall of the rotating shaft 110, while ensuring close contact between the two, thereby realizing effective limiting.

[0035] As shown in Figure 2As shown, in some embodiments, the limiting member 410 further includes a plurality of limiting protrusions 412, which are disposed on the limiting surface 411.

[0036] In this embodiment, the limiting protrusion 412 on the limiting surface 411 contacts the circumferential sidewall of the rotating shaft 110, increasing the friction between the limiting surface 411 and the sidewall of the rotating shaft 110. In the limiting state, the limiting protrusion 412 is in close contact with the circumferential sidewall of the rotating shaft 110, preventing the rotating shaft 110 from rotating in the axial direction, thereby improving the limiting effect.

[0037] like Figure 2 As shown, in some embodiments, a plurality of limiting protrusions 412 are arranged sequentially along the circumference of the rotating shaft 110, and each limiting protrusion 412 extends along the axial direction of the rotating shaft 110.

[0038] In this embodiment, multiple limiting protrusions 412 are arranged sequentially along the circumference of the rotating shaft 110 (i.e., the direction around the circumference of the rotating shaft 110), ensuring that the limiting protrusions 412 form a tight contact with the circumferential sidewall of the rotating shaft 110, increasing the circumferential friction force of the limiting member 410 on the rotating shaft 110, and the limiting member 410 can more effectively prevent the rotating shaft 110 from rotating in the circumferential direction, thus improving the limiting stability of the limiting member 410 on the rotating shaft 110.

[0039] like Figure 2 As shown, in some embodiments, a limiting plate 220 is also provided at one end of the second measuring ruler 200 near the protractor 300. The limiting plate 220 is fixedly connected to the second measuring ruler 200, and the extending direction of the limiting plate 220 is consistent with the extending direction of the second measuring ruler 200.

[0040] In this embodiment, when the first measuring ruler 100 rotates to 180°, the limiting plate 220 abuts against the first measuring ruler 100, thereby preventing the first measuring ruler 100 from continuing to rotate and preventing structural damage or measurement errors caused by excessive rotation.

[0041] like Figure 3 As shown, in some embodiments, a first fixing component 450 is provided on the first measuring ruler 100, and a second fixing component 210 is provided on the second measuring ruler 200.

[0042] In the present embodiment, through the interaction of the first fixing assembly 450 and the second fixing assembly 210, the two measuring scales can be relatively positioned at a specific position to measure the angle during the measurement process. For example, when the angle needs to be measured, the first measuring scale 100 and the second measuring scale 200 can be fixed at the required position, and as the measured object rotates or moves, the first measuring scale 100 and the second measuring scale 200 also expand to a specific angle without manual rotation. At the same time, when reading the measured angle, there is no need to manually hold the measuring scale, which ensures the accuracy of the measurement result.

[0043] As shown in Figure 4 In some embodiments, the first fixing assembly 450 includes a first suction cup 451, a support rod 452, and a second elastic reset member 453. The support rod 452 is arranged at one end of the first measuring scale 100 away from the protractor 300. The support rod 452 is slidingly connected to the first measuring scale 100 along the axial direction of the rotating shaft 110. The first suction cup 451 is connected to one end of the support rod 452. The second elastic reset member 453 is sleeved on the support rod 452. The second elastic reset member 453 is connected to the support rod 452 at one end in the length direction of the second elastic reset member 453, and is connected to the first measuring scale 100 at the other end. The second fixing assembly 210 includes a plurality of second suction cups, which are sequentially and spaced apart along the extension direction of the second measuring scale 200.

[0044] In the present embodiment, the first measuring scale 100 can be fixed on a certain target surface through the first suction cup 451 of the first fixing assembly 450, and then the second measuring scale 200 can be rotated to adapt to different measurement requirements, so as to perform stable measurement. Since the first suction cup 451 is arranged at one end of the support rod 452, and the second elastic reset member 453 is sleeved on the end of the support rod 452 away from the suction cup, the first suction cup 451 of the first fixing assembly 450 is accommodated in the recessed portion 454 of the first measuring scale 100 under the elastic force of the second elastic member in the initial state, which helps to protect the first suction cup 451 from external damage.

[0045] Meanwhile, if the second measuring scale 200 needs to be fixed, when the first measuring scale 100 is rotated, the first suction disc 451 is accommodated in the recessed portion 454 under the elastic force of the second elastic reset member 453, and the first suction disc 451 will not interfere with the object to be measured when the second measuring scale 200 is rotated, when the second measuring scale 200 is rotated to the position to be fixed, the second elastic reset member 453 is compressed by pressing the supporting rod 452, the first suction disc 451 is stretched out from the recessed portion 454 of the first measuring scale 100 along the rotation shaft 110 in the axial direction, so as to adsorb the surface of the object to be measured, so that the second measuring scale 200 can be fixed on the surface of the object to be measured, without manually holding the second measuring scale 200, the stability of the angle measuring device 1000 when reading the angle is improved, and the measurement accuracy is improved.

[0046] In some optional embodiments, the second fixing assembly 210 comprises a plurality of second suction discs, and the plurality of second suction discs are sequentially and spacedly arranged along the extension direction of the second measuring scale 200, so as to improve the measurement accuracy and stability.

[0047] Although the utility model has been described with reference to the preferred embodiments, various improvements can be made to it and equivalent components can be substituted for the components thereof without departing from the scope of the utility model. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An angle measuring device, characterized in that, include: A first measuring ruler, one end of which is provided with a rotating shaft, the axis of which is perpendicular to the extension direction of the first measuring ruler; A second measuring ruler, one end of which is rotatably connected to the rotating shaft, wherein the rotation direction of the second measuring ruler is perpendicular to the axis of the rotating shaft; A protractor, the center of which is rotatably connected to the pivot; and A limiting component, at least a portion of which is fixedly connected to the second measuring scale, and which abuts against the rotating shaft to limit the axial rotation of the rotating shaft.

2. The angle measuring device as described in claim 1, characterized in that, The limiting component includes a first state and a second state, and the limiting component can switch between the first state and the second state. In the first state, the limiting component abuts against the circumferential sidewall of the rotating shaft, and the limiting component limits the axial rotation of the rotating shaft. In the second state, the limiting component separates from the circumferential sidewall of the rotating shaft, and the limiting component releases the limitation on the axial rotation of the rotating shaft.

3. The angle measuring device as described in claim 1 or 2, characterized in that, The limiting component includes: The limiting member is capable of moving radially toward or away from the circumferential sidewall of the rotating shaft; The fixing plate is fixedly connected to the second measuring ruler; A connecting rod is movably connected to the fixed plate along the radial direction of the rotating shaft; one end of the connecting rod is connected to the limiting member, and the other end of the connecting rod is connected to the fixed plate; and A first elastic reset member is sleeved on the connecting rod and disposed between the limiting member and the fixing plate. One end of the first elastic reset member along its own length direction is connected to the limiting member, and the other end is connected to the fixing plate.

4. The angle measuring device as described in claim 3, characterized in that, The limiting member includes a limiting surface, which is arc-shaped and has at least a portion of the shape of the circumferential sidewall of the rotating shaft.

5. The angle measuring device as described in claim 4, characterized in that, The limiting member also includes a plurality of limiting protrusions, which are disposed on the limiting surface.

6. The angle measuring device as described in claim 5, characterized in that, The plurality of limiting protrusions are arranged sequentially along the circumference of the rotating shaft, and each limiting protrusion extends along the axial direction of the rotating shaft.

7. The angle measuring device as described in claim 4, characterized in that, The first measuring ruler is provided with a first fixing component, and the second measuring ruler is provided with a second fixing component.

8. The angle measuring device as described in claim 7, characterized in that, The first fixing component includes a first suction cup, a support rod, and a second elastic reset member. The support rod is disposed at the end of the first measuring scale away from the protractor and is slidably connected to the first measuring scale along the axial direction of the rotating shaft. The first suction cup is connected to one end of the support rod. The second elastic reset member is sleeved on the support rod, with one end connected to the support rod along its length and the other end connected to the first measuring scale. The surface of the first measuring scale has a recessed portion formed along the axial direction of the rotating shaft, and the first suction cup is disposed in the recessed portion. And / or the second fixing component includes a plurality of second suction cups, which are spaced apart sequentially along the extension direction of the second measuring ruler.

9. The angle measuring device as described in claim 1, characterized in that, The protractor is equipped with a pointer, one end of which is fixedly connected to the rotating shaft, and the pointer is parallel to the first measuring ruler.

10. The angle measuring device as described in claim 1, characterized in that, The second measuring ruler is also provided with a limiting plate at one end near the protractor. The limiting plate is fixedly connected to the second measuring ruler, and the extending direction of the limiting plate is consistent with the extending direction of the second measuring ruler.

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