A high-precision multi-axis rotational speed measuring device and a rotational speed measuring method thereof

Abstract

The application relates to the technical field of rotational speed measurement, in particular to a high-precision multi-shaft rotational speed measuring device and a rotational speed measuring method thereof, which comprises a detection main body and further comprises the following: a plurality of groups of round holes are arranged on one side of the detection main body; a speed measuring mechanism for measuring speed is arranged, the speed measuring mechanism comprises a cylinder arranged in the installation cavity, the end of the cylinder is rotationally connected with a sleeve through a bearing, a limiting rod fixedly connected with the inner wall of the installation cavity is arranged in the sleeve, a first gear is sleeved on the surface of the cylinder, and the surface of the first gear is meshedly connected with a second gear. Through the cooperation of various components, the output shaft of the equipment to be detected can be clamped and fixed, the first gear and the second gear are cooperated, the sleeve starts to rotate when following the rotation of the equipment to be detected, the second gear starts to rotate and drives the meter to rotate to start measurement, the result is displayed on the display of the detection main body, and the accuracy of the detection result is ensured.

Description

Technical Field

[0001] This invention relates to the field of rotational speed measurement technology, specifically to a high-precision multi-axis rotational speed measuring device and its rotational speed measurement method. Background Technology

[0002] Rotational speed measurement refers to a system for measuring the rotational speed of an object. It is divided into centrifugal tachometers and magnetic tachometers. Currently, most rotational speed measurement methods involve manually holding a handheld rotational speed measuring device to detect the rotating equipment. This involves attaching a signal reflector patch to the output shaft of the rotating equipment, and then holding a signal-transmitting and receiving device aligned with the output shaft. The rotational speed is measured by receiving the signal reflected by the reflector patch. However, this method is prone to shaking during manual handheld operation, leading to inaccurate measurement results. Summary of the Invention

[0003] To address the aforementioned shortcomings of existing technologies, this invention provides a high-precision multi-axis speed measuring device and its speed measuring method, which can effectively solve the problem that in existing technologies, when the speed is measured manually by holding the speed measuring instrument, the measurement is not accurate due to hand shaking.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] This invention provides a high-precision multi-axis speed measuring device, including a detection body with an internal mounting cavity and a measuring instrument installed inside the mounting cavity. It also includes: multiple sets of circular holes on one side of the detection body; and a speed measuring mechanism, the speed measuring mechanism including a cylinder inside the mounting cavity, with a receiving groove at one end of the cylinder near the circular holes, and a clamping component inside the cylinder. A sleeve is rotatably connected to the end of the cylinder via a bearing, and a limiting rod fixedly connected to the inner wall of the mounting cavity is inserted inside the sleeve. A first gear is sleeved on the surface of the cylinder, and a second gear is meshed with the surface of the first gear, which is fixedly connected to the output end of the measuring instrument. A fixing mechanism for fixing the position of the cylinder includes a pressing block and a fixing block. The pressing block is rotatably connected to the inner wall of the mounting cavity via a hollow rotating shaft and a torsion spring. Two sets of protrusions are symmetrically formed on the inner wall of one end of the hollow rotating shaft, and a circular rod is provided on one side of the hollow rotating shaft, with two sets of guide grooves circumferentially formed on the surface of the circular rod.

[0006] Furthermore, the inner wall of the mounting cavity is provided with an arc-shaped inclined surface.

[0007] Furthermore, the clamping member includes multiple sets of arc-shaped plates disposed inside the receiving groove. A vertical rod is fixedly installed on the outer arc surface of the arc-shaped plate, and the vertical rod penetrates through the inner wall of the receiving groove and extends to the outside. A trapezoidal block is fixedly installed at the upper end of the vertical rod, and multiple sets of ball bearings are movably installed on the slope surface of the trapezoidal block.

[0008] Furthermore, the sleeve has a groove on its surface, and the bottom surface of the groove has an arc-shaped structure.

[0009] Furthermore, the sleeve is elastically connected to the inner wall of the mounting cavity via a return spring, and the return spring is sleeved on the surface of the limiting rod.

[0010] Furthermore, the lower end of the fixing block has a semi-circular structure, and the fixing block slides with the inner wall of the mounting cavity through a connecting spring, and the fixing block and the groove are pressed together.

[0011] Furthermore, the round rod has an L-shaped structure, and one end of the round rod is fixedly connected to the surface of the bearing.

[0012] Furthermore, the guide groove is formed by connecting and combining a set of straight grooves and a set of arc-shaped grooves.

[0013] A speed measurement method for a high-precision multi-axis speed measuring device, the speed measurement method comprising the following steps:

[0014] S1: Insert the output shaft of the speed test device into the receiving groove at one end of the cylinder from the inside of the round hole and press it inward continuously, so that the ball contacts the arc-shaped inclined surface and is squeezed, so that the arc plate clamps and fixes the output shaft of the speed test device. At the same time, the first gear will move synchronously and begin to mesh with the second gear.

[0015] S2: During the movement of the cylinder, the round rod installed on the bearing surface moves synchronously and enters the interior of the hollow rotating shaft. With the cooperation of the guide groove and protrusion on the surface of the round rod, the extrusion block begins to extrude the fixing block to move down and enter the interior of the groove, thus fixing the sleeve.

[0016] S3: When the speed device to be tested cannot be pushed, fix the speed device to be tested, and then start the device to be tested, so that the output shaft of the speed device to be tested drives the cylinder to rotate, which in turn drives the second gear fixedly connected to the output shaft of the meter to start rotating, so that the meter starts to measure and displays the test result on the display on the testing body.

[0017] S4: After the test is completed, loosen the device that is fixed to the speed of the test and pull it outward.

[0018] The technical solution provided by this invention has the following advantages compared with the known prior art:

[0019] This invention, through the setting of a speed measuring mechanism and its cooperation with other components, enables the output shaft of the device under test to be clamped and fixed when the rotational speed of the device under test is measured. Through the cooperation of the first gear and the second gear, when the sleeve rotates with the device under test, the second gear, which is coaxially connected to the measuring instrument, starts to rotate and drives the measuring instrument to start measuring the rotational speed of the device under test. The measurement result is displayed on the display of the testing body, thereby ensuring the accuracy of the test result. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the main cross-sectional structure of the present invention;

[0023] Figure 3 In this invention Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0024] Figure 4 This is a schematic diagram of the clamping component structure in this invention;

[0025] Figure 5 In this invention Figure 2 Enlarged schematic diagram of the structure at point B;

[0026] Figure 6 This is a schematic diagram of the fit between the extrusion block and the fixing block in this invention;

[0027] Figure 7 In this invention Figure 6 Enlarged schematic diagram of the structure at point C;

[0028] Figure 8 This is a schematic diagram of the guide groove structure in this invention;

[0029] Figure 9 This is a schematic diagram showing the structural changes of the speed measuring mechanism during speed measurement in this invention.

[0030] The labels in the diagram represent: 1. Detection body; 101. Mounting cavity; 2. Circular hole; 3. Speed ​​measuring mechanism; 301. Cylinder; 3011. Arc plate; 3012. Vertical rod; 3013. Trapezoidal block; 3014. Ball bearing; 302. Bearing; 303. Sleeve; 3031. Groove; 304. Limiting rod; 305. Return spring; 306. First gear; 307. Second gear; 4. Measuring device; 5. Fixing mechanism; 501. Extrusion block; 502. Hollow rotating shaft; 503. Protrusion; 504. Fixing block; 505. Circular rod; 506. Guide groove. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] The present invention will be further described below with reference to embodiments.

[0033] Example: A high-precision multi-axis speed measuring device, such as Figures 1-9 The device includes a detection body 1, with an internal mounting cavity 101 for mounting components for detecting rotational speed. The inner wall of the mounting cavity 101 has an arc-shaped inclined surface, allowing it to contact the ball bearing 3014. A measuring device 4 is installed inside the mounting cavity 101; this measuring device 4 is a product of the prior art, and its working principle is to count once for each rotation. Simultaneously, the measuring device 4 is electrically connected to a display on the detection body 1, allowing the data measured by the measuring device 4 to be displayed on the display. The device also includes multiple sets of circular holes 2 on one side, through which the output shaft of the device to be tested can enter and be fixed, facilitating rotational speed detection.

[0034] It also includes a speed measuring mechanism 3 for measuring speed. The speed measuring mechanism 3 includes a cylinder 301 disposed inside the mounting cavity 101, and a receiving groove is provided at one end of the cylinder 301 near the circular hole 2. By setting the cylinder 301, it is possible to facilitate the output shaft of the device whose speed is to be measured to enter the interior of the receiving groove.

[0035] The cylinder 301 is equipped with a clamping component inside. By setting the clamping component, the output shaft of the device whose rotational speed is to be tested can be fixed inside the receiving groove, so that the cylinder 301 and the output shaft of the device whose rotational speed is to be tested are integrated to facilitate synchronous rotation. The clamping component includes multiple sets of arc-shaped plates 3011 disposed inside the receiving groove. The arc-shaped plates 3011 are equidistantly arranged around the inside of the receiving groove, which facilitates the fixing of the output shaft of the device to be tested. It is worth noting that the arc-shaped plates 3011 are elastically connected to the inner wall of the receiving groove by circular springs.

[0036] The arc plate 3011 has a vertical rod 3012 fixedly installed on its outer arc surface. The vertical rod 3012 penetrates the inner wall of the receiving groove and extends to the outside. By setting the vertical rod 3012, it can play a guiding and limiting role, so as to drive the arc plate 3011 to rise and fall. The upper end of the vertical rod 3012 has a trapezoidal block 3013 fixedly installed. Multiple sets of ball bearings 3014 are movably installed on the slope of the trapezoidal block 3013. By setting the ball bearings 3014, the ball bearings 3014 can cooperate with the arc-shaped inclined surface to make the trapezoidal block 3013 move downward. The vertical rod 3012 drives the arc plate 3011 to fix the output shaft of the equipment to be tested.

[0037] The sleeve 303 is rotatably connected to the end of the cylinder 301 via the bearing 302. By setting the sleeve 303 and the bearing 302, the sleeve 303 and the cylinder 301 can be connected through the bearing 302. At the same time, the sleeve 303 can fix the position of the cylinder 301 during speed measurement. The surface of the sleeve 303 is provided with a groove 3031, and the bottom surface of the groove 3031 is an arc-shaped structure. By providing the groove 3031, it can cooperate with some components to fix the sleeve 303.

[0038] The sleeve 303 is fitted with a limiting rod 304 that is fixedly connected to the inner wall of the mounting cavity 101. By setting the limiting rod 304, the sleeve 303 can be limited during speed measurement to prevent it from rotating synchronously with the cylinder 301. The sleeve 303 is elastically connected to the inner wall of the mounting cavity 101 through a return spring 305, and the return spring 305 is sleeved on the surface of the limiting rod 304. By setting the return spring 305, the reaction force generated by it can drive the moving sleeve 303 to return to its original position.

[0039] The cylinder 301 has a first gear 306 sleeved on its surface, which serves to connect and transmit power. The first gear 306 has a second gear 307 meshing with its surface, and the second gear 307 is fixedly connected to the output end of the meter 4. The second gear 307 can rotate synchronously with the first gear 306, thereby driving the meter 4 to rotate simultaneously and start measuring the rotation speed.

[0040] See attached document Figure 1 -Appendix Figure 9 By setting a fixing mechanism 5, the position of the cylinder 301 is fixed. The mechanism includes a pressing block 501 and a fixing block 504. The pressing block 501 is rotatably connected to the inner wall of the mounting cavity 101 through a hollow rotating shaft 502 and a torsion spring. By setting a torsion spring, the hollow rotating shaft 502 is rotatably connected to the inner wall of the mounting cavity 101, so that the pressing block 501 can be reset after rotation.

[0041] The hollow rotating shaft 502 has two sets of protrusions 503 symmetrically arranged on the inner wall of one end. By setting the protrusions 503, it can be used in conjunction with other components. The lower end of the fixing block 504 has a semi-circular structure. The fixing block 504 slides in conjunction with the inner wall of the mounting cavity 101 through the connecting spring. The fixing block 504 is also pressed in conjunction with the groove 3031. By setting the lower end of the fixing block 504 to a semi-circular structure, it is easier to contact the groove 3031 better, thereby increasing the friction and achieving a better fixing effect.

[0042] The hollow rotating shaft 502 has a round rod 505 on one side. The round rod 505 has an L-shaped structure, and one end of the round rod 505 is fixedly connected to the surface of the bearing 302. By setting the round rod 505, it can move synchronously with the movement of the bearing 302 to drive other parts to perform actions. The surface of the round rod 505 is provided with two sets of guide grooves 506. The guide grooves 506 are formed by connecting and combining a set of straight grooves and a set of arc grooves. By setting the guide grooves 506, the extrusion block 501 can be rotated according to its shape and the mutual cooperation with the protrusion 503, so that the extrusion block 501 can start to extrude the fixed block 504 to move down and fix the sleeve 303.

[0043] Specifically, when measuring the rotational speed of the equipment, the output shaft of the equipment to be tested is inserted into the receiving groove at one end of the cylinder 301 through the circular hole 2 and continuously pressed into the mounting cavity 101. With continuous pressing, the cylinder 301 will drive the sleeve 303 to move synchronously and begin to compress the return spring 305. At the same time, the ball 3014 will also begin to contact and squeeze with the arc-shaped inclined surface. The trapezoidal block 3013 will start to drive the arc plate 3011, which is fixedly connected to the vertical rod 3012, to move down and begin to fix the output shaft of the equipment to be tested, so that the output shaft of the equipment to be tested and the cylinder 301 become one piece. At the same time, the first gear 306 will also begin to mesh with the second gear 307.

[0044] As the cylinder 301 moves into the mounting cavity 101, it simultaneously drives the rod 505 to move, causing one end of the rod 505 to enter the hollow rotating shaft 502. Then, the guide groove 506 begins to cooperate with the protrusion 503. As the rod 505 continues to move, the pressing block 501 begins to rotate under the action of a set of arc grooves. The pressing block 501 then presses the fixing block 504 to move downward and enter the groove 3031, thereby fixing the sleeve 303.

[0045] When the device under test cannot be pressed into the mounting cavity 101, the device under test is fixed and then started, so that its output shaft drives the cylinder 301 to start rotating, which in turn drives the second gear 307 meshing with the first gear 306 to start rotating, and then drives the output shaft of the meter 4 to start rotating through the second gear 307, starting to measure the rotation speed of the device under test and displaying the test result on the display of the test body 1.

[0046] After the test is completed, loosen the fixed device to be tested and pull it outward to separate the device from the test body 1.

[0047] A method for measuring the rotational speed of a high-precision multi-axis rotational speed measuring device includes the following steps:

[0048] S1: Insert the output shaft of the speed test device into the receiving groove at one end of the cylinder 301 from the inside of the circular hole 2 and press it inward continuously, so that the ball 3014 contacts the arc-shaped inclined surface and is squeezed, so that the arc plate 3011 clamps and fixes the output shaft of the speed test device. At the same time, the first gear 306 will move synchronously and start meshing with the second gear 307.

[0049] S2: During the movement of the cylinder 301, the round rod 505 installed on the surface of the bearing 302 moves synchronously and enters the interior of the hollow rotating shaft 502. With the cooperation of the guide groove 506 and the protrusion 503 on the surface of the round rod 505, the pressing block 501 begins to press the fixing block 504 down and into the interior of the groove 3031 to fix the sleeve 303.

[0050] S3: When the speed device to be tested cannot be pushed, fix the speed device to be tested, and then start the device to be tested, so that the output shaft of the speed device to be tested drives the cylinder 301 to rotate, which in turn drives the second gear 307, which is fixedly connected to the output shaft of the meter 4, to start rotating, so that the meter 4 starts measuring and displays the test result on the display on the test body 1.

[0051] S4: After the test is completed, loosen the device that is fixed to the speed of the test and pull it outward.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-precision multi-axis rotational speed measuring device, comprising a detection body (1), wherein the detection body (1) has an internal mounting cavity (101), and a measuring instrument (4) mounted inside the mounting cavity (101), characterized in that, Also includes: The detection body (1) has multiple sets of circular holes (2) on one side; And a speed measuring mechanism (3) for measuring speed, the speed measuring mechanism (3) includes a cylinder (301) disposed inside the mounting cavity (101), and a receiving groove is provided at one end of the cylinder (301) near the circular hole (2), and a clamping member is provided inside the cylinder (301). A sleeve (303) is rotatably connected to the end of the cylinder (301) through a bearing (302). A limiting rod (304) fixedly connected to the inner wall of the mounting cavity (101) is inserted inside the sleeve (303). A first gear (306) is sleeved on the surface of the cylinder (301). A second gear (307) is meshed on the surface of the first gear (306), and the second gear (307) is fixedly connected to the output end of the meter (4). The fixing mechanism (5) is used to fix the position of the cylinder (301), including the extrusion block (501) and the fixing block (504). The extrusion block (501) is rotatably connected to the inner wall of the mounting cavity (101) through the hollow rotating shaft (502) and the torsion spring. Two sets of protrusions (503) are symmetrically opened on the inner wall of one end of the hollow rotating shaft (502). A round rod (505) is provided on one side of the hollow rotating shaft (502). Two sets of guide grooves (506) are opened around the surface of the round rod (505).

2. The high-precision multi-axis speed measuring device according to claim 1, characterized in that, The inner wall of the mounting cavity (101) is provided with an arc-shaped inclined surface.

3. The high-precision multi-axis speed measuring device according to claim 2, characterized in that, The clamping member includes multiple sets of arc-shaped plates (3011) disposed inside the receiving groove. A vertical rod (3012) is fixedly installed on the outer arc surface of the arc-shaped plate (3011), and the vertical rod (3012) penetrates through the inner wall of the receiving groove and extends to the outside. A trapezoidal block (3013) is fixedly installed at the upper end of the vertical rod (3012), and multiple sets of ball bearings (3014) are movably installed on the slope surface of the trapezoidal block (3013).

4. The high-precision multi-axis speed measuring device according to claim 3, characterized in that, The sleeve (303) has a groove (3031) on its surface, and the bottom surface of the groove (3031) is an arc-shaped structure.

5. A high-precision multi-axis speed measuring device according to claim 4, characterized in that, The sleeve (303) is elastically connected to the inner wall of the mounting cavity (101) through a return spring (305), and the return spring (305) is sleeved on the surface of the limiting rod (304).

6. A high-precision multi-axis speed measuring device according to claim 5, characterized in that, The lower end of the fixing block (504) is a semi-circular structure, and the fixing block (504) slides with the inner wall of the mounting cavity (101) through the connecting spring, and the fixing block (504) and the groove (3031) are pressed together.

7. A high-precision multi-axis speed measuring device according to claim 6, characterized in that, The round rod (505) has an L-shaped structure, and one end of the round rod (505) is fixedly connected to the surface of the bearing (302).

8. A high-precision multi-axis speed measuring device according to claim 7, characterized in that, The guide groove (506) is formed by connecting and combining a set of straight grooves and a set of arc grooves.

9. A speed measurement method for a high-precision multi-axis speed measuring device, wherein the speed measurement method is applied to the high-precision multi-axis speed measuring device according to claim 8, characterized in that, The rotational speed measurement method includes the following steps: S1: Insert the output shaft of the speed test device into the receiving groove opened at one end of the cylinder (301) from the inside of the round hole (2) and press it inward continuously, so that the ball (3014) contacts the arc-shaped inclined surface and is squeezed, so that the arc plate (3011) clamps and fixes the output shaft of the speed test device. At the same time, the first gear (306) will move synchronously and start to mesh with the second gear (307). S2: During the movement of the cylinder (301), the round rod (505) installed on the surface of the bearing (302) moves synchronously and enters the interior of the hollow rotating shaft (502). With the cooperation of the guide groove (506) and the protrusion (503) on the surface of the round rod (505), the pressing block (501) begins to press the fixing block (504) down and into the interior of the groove (3031) to fix the sleeve (303). S3: When the speed device to be tested cannot be pushed, fix the speed device to be tested, and then start the device to be tested, so that the output shaft of the speed device to be tested drives the cylinder (301) to rotate, which in turn drives the second gear (307) fixedly connected to the output shaft of the meter (4) to start rotating, so that the meter (4) starts to measure and displays the test result on the display on the test body (1); S4: After the test is completed, loosen the device that is fixed to the speed of the test and pull it outward.

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