Angle detection device

Abstract

The utility model belongs to the technical field of product detection, and discloses an angle detection device. The angle detection device comprises a base and a rotating shaft, the base is used for fixing a motor, a detection hole is formed in the base, the detection hole can directly face an output shaft of the motor, angle scales are arranged on the outer surface of the base, and the angle scales surround the peripheral side of the detection hole; the rotating shaft penetrates through the detection hole, is matched with the output shaft and can drive the output shaft to rotate from a first position to a second position; the pointer is arranged on the peripheral side of the rotating shaft and can point to the angle scales. The angle detection device is convenient to operate in the detection process, accurate in detection and high in precision, and the detection efficiency of the motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of product detection, in particular to an angle detection device. Background Art

[0002] In modern industry, motors, as key power equipment, are widely used in various scenarios. Reliable motor operation depends on precise control and monitoring systems. Microswitches, as important control components, play a key role in motors. Microswitches within motors are typically used to detect specific operating states or positions of the motor, enabling precise control and protection. For example, in some motors, microswitches can detect the motor's rotational position, extreme positions, or specific operating states. When the motor reaches a specific state, the microswitch triggers a corresponding signal, thereby achieving control and protection for the motor.

[0003] However, due to the complex internal structure and limited space of the motor, the installation position of the micro switch is often difficult to observe and determine directly, which brings certain difficulties to the installation, debugging and maintenance of the motor. If the installation position of the micro switch is inaccurate, it may cause the motor to not work properly, or even cause a safety accident. Therefore, during the production process of the motor, it is necessary to detect whether the installation position of the micro switch is accurate. The usual practice is to detect whether the angle of rotation of the output shaft meets the preset range when the motor output shaft is rotated from the initial position to the position that touches the micro switch, to determine whether the motor is qualified. In the prior art, the angle is measured by dot-marking using a three-coordinate measuring machine, which requires the cooperation of two people: one person rotates the angle and fixes it by hand, and the other person operates the three-coordinate measuring machine. This detection method is cumbersome to operate and is prone to deviations, resulting in inaccurate measured angles and low measurement accuracy.

[0004] Therefore, there is an urgent need to provide an angle detection device to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide an angle detection device, which has convenient detection operation, accurate detection and high precision.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] An angle detection device, comprising:

[0008] A base for fixing the motor, wherein the base is provided with a detection hole, the detection hole being able to face the output shaft of the motor, and an outer surface of the base is provided with an angle scale, the angle scale surrounding the circumference of the detection hole;

[0009] a rotating shaft, the rotating shaft being passed through the detection hole and cooperating with the output shaft, the rotating shaft being capable of driving the output shaft to rotate from a first position to a second position;

[0010] A pointer is provided on the circumferential side of the rotating shaft, and the pointer can point to the angular scale.

[0011] As an alternative solution of the angle detection device, a shaft hole for the rotating shaft to pass through is provided in the output shaft. A convex block is provided on the inner side wall of the shaft hole, and a groove for plugging and matching with the convex block is provided on the circumferential side of the rotating shaft.

[0012] As an alternative solution of the angle detection device, the pointer includes a collar and a pointer body. The pointer body is connected to the outer circumference of the collar. The collar is sleeved on the rotating shaft. A limiting convex portion is convexly provided on the inner circle of the collar, and the limiting convex portion is plugged and matched with the groove.

[0013] As an alternative solution of the angle detection device, the collar and the rotating shaft are in interference fit.

[0014] As an alternative solution of the angle detection device, the groove is a sector for plugging and matching with the convex block, and the distance between the two side walls of the groove gradually increases in the radial direction away from the axis of the rotating shaft.

[0015] As an alternative solution of the angle detection device, the axis of symmetry of the pointer coincides with the axis of symmetry of the groove.

[0016] As an alternative solution of the angle detection device, at the first position, the pointer points to the zero value of the angular scale.

[0017] As an alternative solution of the angle detection device, one end of the rotating shaft away from the motor extends to the outside of the base and is provided with a handle.

[0018] As an alternative solution of the angle detection device, a counterbore coaxially communicating with the detection hole is provided on the base. The aperture of the counterbore is larger than the aperture of the detection hole, and a stepped surface is formed at the connection between the counterbore and the detection hole. A bearing is installed in the counterbore, and the bearing abuts against the stepped surface. The rotating shaft passes through the detection hole and rotates in cooperation with the bearing.

[0019] As an alternative solution of the angle detection device, the rotating shaft and the shaft hole are in clearance fit.

[0020] Beneficial effects:

[0021] The utility model provides an angle detection device, in which a rotating shaft passes through a detection hole of a base and rotates with a shaft hole of a motor. During detection, the rotating shaft can drive the output shaft to rotate from a first position to a second position, and at the same time drive the pointer to rotate so that the pointer points to different scale values on the angle scale. The first position is the initial position, at which time the pointer points to the first scale value, and the second position is the position of touching the micro switch, at which time the pointer points to the second scale value. The difference between the second scale value and the first scale value is the actual rotation angle of the output shaft. The actual rotation angle is compared with the theoretical angle. If the actual rotation angle falls within the range of the ideal angle, it indicates that the installation position of the micro switch is accurate, and the motor is qualified. If the actual rotation angle falls outside the range of the ideal angle, it indicates that the installation position of the micro switch is inaccurate, and the motor is unqualified. The angle detection device is easy to operate and has high detection accuracy. It can perform accurate and efficient detection, thereby improving the production efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the angle detection device provided by an embodiment of the utility model;

[0023] Figure 2 It is a structural schematic diagram of the base provided by an embodiment of the utility model;

[0024] Figure 3 yes Figure 2 Cross-sectional view at the AA position;

[0025] Figure 4 This is a partial enlarged view of the cooperation between the rotating shaft and the output shaft provided in the embodiment of the utility model;

[0026] Figure 5 is a top view of a pointer provided by an embodiment of the utility model;

[0027] Figure 6 is a top view of the angle detection device provided by an embodiment of the utility model;

[0028] Figure 7 is a side view of the angle detection device provided by an embodiment of the present utility model;

[0029] Figure 8 It is a structural schematic diagram of the side panel provided by an embodiment of the utility model.

[0030] In the figure:

[0031] 1-base; 11-top plate; 12-side plate; 13-angle scale; 14-detection hole; 15-counterbore; 16-first mounting hole; 17-third mounting hole; 18-bearing;

[0032] 2-shaft; 21-pointer; 22-handle; 23-groove; 211-ring; 212-pointer body; 213-limiting protrusion;

[0033] 3-motor; 31-output shaft; 32-shaft hole; 33-bump; 34-fixing plate; 35-first fastener; 36-second fastener; 37-fourth mounting hole. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0035] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood by those skilled in the art in specific circumstances.

[0036] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper" and "lower" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive distinction and do not have any special meaning.

[0038] This embodiment provides an angle detection device, such as Figure 1-2As shown, the angle detection device includes a base 1, a rotating shaft 2, and a pointer 21. The base 1 is used to fix the motor 3 and is provided with a detection hole 14. The detection hole 14 can be directly opposite the output shaft 31 of the motor 3. The outer surface of the base 1 is provided with an angle scale 13, which surrounds the detection hole 14. The rotating shaft 2 passes through the detection hole 14 and cooperates with the output shaft 31. The rotating shaft 2 can drive the output shaft 31 to rotate from a first position to a second position. The pointer 21 is provided on the side of the rotating shaft 2 and can point to the angle scale 13.

[0039] Specifically, during testing, rotating the shaft 2 drives the output shaft 31 from a first position to a second position, simultaneously rotating the pointer 21 so that the pointer 21 points to different scale values on the angle scale 13. The first position is the initial position, at which the pointer 21 points to the first scale value. The second position is the position at which the output shaft 31 hits the microswitch, making an audible sound. At this point, the pointer 21 points to the second scale value. The difference between the second scale value and the first scale value is the actual rotation angle of the output shaft 31. This actual rotation angle is compared with the theoretical angle. If the actual rotation angle falls within the ideal angle range, it indicates that the microswitch is correctly installed and the motor 3 is qualified. If the actual rotation angle falls outside the ideal angle range, it indicates that the microswitch is incorrectly installed and the motor 3 is unqualified. This angle detection device completes the testing process simply by rotating the shaft 2 and can be operated by one person. Furthermore, the coordination between the pointer 21 and the angle scale 13 makes the test results intuitive and readable, improving the efficiency and accuracy of the test.

[0040] In this embodiment, if Figure 4 As shown, the output shaft 31 is provided with an axial hole 32 for the rotation shaft 2 to pass through. The inner wall of the axial hole 32 is provided with a protrusion 33. The circumference of the rotation shaft 2 is provided with a groove 23 that plugs into the protrusion 33. The groove 23 extends axially through the rotation shaft 2. The plug-in fit between the protrusion 33 and the groove 23 forms a rotation-restricted connection between the rotation shaft 2 and the output shaft 31, making the connection more stable and reliable. During rotation, it effectively prevents relative rotation between the rotation shaft 2 and the output shaft 31, ensuring accurate angle detection. The simple and efficient connection method is also convenient during installation and removal, which helps to improve the ease of use and maintenance efficiency of the angle detection device.

[0041] Among them, such as Figure 4 As shown, the protrusion 33 is fan-shaped, and the distance between its two side walls gradually decreases in the radial direction toward the axis of the output shaft 31. It should be noted that this protrusion 33 is a structural feature inherent to the motor 3. This protrusion 33 is based on the design of the motor 3. In the angle detection device provided in this embodiment, this existing structure of the motor 3 is utilized to achieve the mating connection between the rotating shaft 2 and the output shaft 31.

[0042] In some embodiments, as Figure 4 shown, the groove 23 is a sector shape adapted to the shape of the convex block 33, and the distance between the two side walls of the groove 23 gradually increases in the radial direction away from the axis of the rotating shaft 2. The shape adaptation between the groove 23 and the convex block 33 further enhances the stability of the connection between the rotating shaft 2 and the output shaft 31, and ensures that the contact between the two is a surface contact, so that the torque and tensile force can be better borne during the rotation process, effectively reducing the stress concentration at the connection part and reducing the risk of component damage. Secondly, the movement of the convex block 33 in the groove 23 is made smoother, and there is no shaking situation, which further ensures that the output shaft 31 can accurately follow the rotation of the rotating shaft 2 and improves the accuracy of angle detection. In some other alternative embodiments, the distance between the two side walls of the groove 23 is equal, and the distance between the two side walls of the groove 23 is equal to or slightly larger than the maximum distance between the two side walls of the convex block 33, ensuring that the groove 23 and the convex block 33 are in line contact, and the circumferential positioning of the groove 23 and the convex block 33 can also be achieved.

[0043] Furthermore, the rotating shaft 2 and the shaft hole 32 are in clearance fit. This fitting method can ensure that the installation and disassembly of the rotating shaft 2 are more convenient. At the same time, the size of the clearance will be controlled within an appropriate range, so as not to affect the coordinated cooperation between the rotating shaft 2 and the output shaft 31.

[0044] In this embodiment, as Figure 5 shown, the pointer 21 is an integrally formed structure, including a collar 211 and a pointer body 212. The pointer body 212 is connected to the outer periphery of the collar 211. The collar 211 is sleeved on the rotating shaft 2. A limiting convex portion 213 is protruded from the inner circle of the collar 211. The limiting convex portion 213 is inserted and matched with the groove 23, so that the pointer 21 and the rotating shaft 2 form a rotation-limiting connection. During the detection process, the pointer 21 will not shake or shift due to the rotation of the rotating shaft 2, ensuring the accuracy of the detection result. At the same time, when maintenance or replacement of the pointer 21 is required, the installation and disassembly of the pointer 21 become more convenient, and the pointer 21 and the rotating shaft 2 are of a split design, which is easy to implement during the manufacturing process.

[0045] Furthermore, the collar 211 and the rotating shaft 2 are in interference fit. With this setting, the installation stability between the pointer 21 and the rotating shaft 2 can be ensured, making the connection between the two closer. The pointer 21 can be more firmly fixed on the rotating shaft 2 without loosening or relative sliding, further ensuring the accuracy of the detection result.

[0046] In some other alternative embodiments, the connection method between the pointer 21 and the rotating shaft 2 can also be integrally formed or welded. The specific connection method is not specifically limited here.

[0047] Further, in some embodiments, when the pointer 21 is installed on the rotating shaft 2, the axis of symmetry of the pointer 21 coincides with the axis of symmetry of the groove 23. At this time, the axis of symmetry of the pointer body 212 coincides with the axis of symmetry of the limiting convex portion 213, and the direction indicated by the pointer body 212 always coincides with the axis of symmetry of the groove 23, that is, the direction indicated by the pointer body 212 always coincides with the axis of symmetry of the convex block 33. In this way, during the rotation of the rotating shaft 2, the pointer 21 can more accurately and intuitively reflect the rotation angle of the output shaft 31, thereby improving the accuracy and convenience of detection. In other embodiments, the direction indicated by the pointer body 212 can be one of the two side walls of the groove 23, which is not specifically limited here, as long as it is ensured that the positional relationship between the pointer body 212 and the groove 23 remains constant during each detection.

[0048] Further, as Figure 6 shown, when the pointer 21 is in the first position, that is, the initial position, the pointer 21 points to the zero value of the angle scale 13, which provides a clear reference for subsequent angle detection. When the output shaft 31 rotates from the first position to the second position, the pointer 21 rotates from pointing to the zero value to pointing to the corresponding scale value, and this scale value is the actual rotation angle of the output shaft 31. There is no need to calculate the angle difference, and the detection is convenient and fast. By comparing the actual rotation angle with the theoretical angle, it is possible to accurately determine whether the installation position of the micro switch is accurate, thereby determining whether the motor 3 is qualified. In addition, the first position can also be other values of the angle scale 13, for example, 10 degrees, 20 degrees, etc., as long as it is ensured that the angle aligned with the first position remains constant during each detection.

[0049] In this embodiment, one end of the rotating shaft 2 away from the motor 3 extends to the outside of the base 1 and is provided with a handle 22 for the operator to operate the rotation of the rotating shaft 2. As Figure 1 shown, the handle 22 is perpendicular to the rotating shaft 2. In addition, the handle 22 and one end of the rotating shaft 2 can be connected by welding or bolt connection, etc., and the specific connection method is not limited here.

[0050] In this embodiment, as Figure 3 shown, the base 1 is provided with a counterbore 15 coaxially communicating with the detection hole 14. The aperture of the counterbore 15 is larger than the aperture of the detection hole 14, and a stepped surface is formed at the connection between the counterbore 15 and the detection hole 14. A bearing 18 is installed in the counterbore 15, and the bearing 18 abuts against the stepped surface. The rotating shaft 2 passes through the detection hole 14 and is rotationally matched with the bearing 18. Through the cooperation of the rotating shaft 2 and the bearing 18, the rotation of the rotating shaft 2 is made more stable and smooth, reducing the friction and resistance during the rotation process, improving the rotation efficiency of the rotating shaft 2, and also reducing the wear between the rotating shaft 2 and the base 1, extending the service life of the angle detection device.

[0051] In this embodiment, asFigure 7-8 As shown, the base 1 is provided with a first mounting hole 16, and a second mounting hole is provided on the housing of the motor 3 at a position corresponding to the first mounting hole 16 (not shown in the figure because it is blocked by the first fastener 35). The first fastener 35 is sequentially passed through the second mounting hole and the first mounting hole 16 to securely connect the motor 3 to the base 1. During the angle detection process, the motor 3 can be stably fixed to the base 1 to reduce displacement or loosening caused by vibration or other external forces, thereby affecting the accuracy of the detection. Among them, the first fastener 35 can be a bolt, a screw, a pin, etc., which is not specifically limited here.

[0052] Furthermore, if Figure 7-8 As shown, in addition to the first mounting hole 16, the base 1 also has a third mounting hole 17. A fourth mounting hole 37 is provided at a position corresponding to the third mounting hole 17 on the fixing plate 34 of the motor 3. Either the third mounting hole 17 or the fourth mounting hole 37 is an elongated hole. A second fastener 36 passes through the fourth mounting hole 37 and the third mounting hole 17, securing the motor 3 to the base 1. This arrangement further enhances the securing effect between the motor 3 and the base 1, and the elongated hole effectively avoids installation problems caused by dimensional errors in the motor 3. The second fastener 36 may be a bolt, screw, pin, or the like, without specific limitation herein.

[0053] In this embodiment, if Figure 1 As shown, the base 1 includes a top plate 11 and a side plate 12. The top plate 11 is provided with a detection hole 14. The side plate 12 is used to fix the motor 3. The top plate 11 and the side plate 12 are vertically arranged and detachably connected, for example, by bolt connection, screw connection, snap connection, etc., which are not specifically limited here. Specifically, Figure 8 As shown, the side panel 12 is L-shaped, which can better fit the external shape of the motor 3. The side wall of the side panel 12 is provided with a first mounting hole 16 and a third mounting hole 17 for fixing to the motor 3. In some optional embodiments, the base 1 also includes a bottom plate (not shown), which is connected to the bottom surface of the side panel 12 and spaced apart from the top plate 11 to support the motor 3. The structure of the base 1 is decomposed into multiple detachably connected and relatively simple components, which can be manufactured separately, reducing production difficulty and cost.

[0054] The working process of the angle detection device of this embodiment is roughly as follows:

[0055] The first step is to fix the motor 3 on the angle detection device.

[0056] In the second step, the rotating shaft 2 is inserted into the detection hole 14 and is circumferentially restricted to fit with the output shaft 31 of the motor 3 , and the pointer 21 is adjusted to the first position, ie, zero scale.

[0057] In the third step, rotate the rotating shaft 2 to drive the output shaft 31 to turn to the second position, i.e., the position where the microswitch makes a sound, and record the actual rotation angle that the output shaft 31 has turned according to the scale value pointed to by the pointer 21.

[0058] In the fourth step, compare the actual rotation angle with the theoretical angle to determine whether the actual rotation angle falls within the range of the ideal angle and whether the position of the microswitch is accurate.

[0059] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. An angle detection device, characterized in that, include: A base (1) is used to fix the motor (3), the base (1) is provided with a detection hole (14), the detection hole (14) can be directly opposite to the output shaft (31) of the motor (3), and the outer surface of the base (1) is provided with an angle scale (13), and the angle scale (13) surrounds the circumference of the detection hole (14); A rotating shaft (2), the rotating shaft (2) is inserted into the detection hole (14) and cooperates with the output shaft (31), and the rotating shaft (2) can drive the output shaft (31) to rotate from a first position to a second position; A pointer (21) is arranged on the circumferential side of the rotating shaft (2), and the pointer (21) can point to the angle scale (13).

2. The angle detection device according to claim 1, characterized in that The output shaft (31) is provided with an axial hole (32) for the rotating shaft (2) to pass through, the inner side wall of the axial hole (32) is provided with a protrusion (33), and the peripheral side of the rotating shaft (2) is provided with a groove (23) for plugging and matching with the protrusion (33).

3. The angle detection device according to claim 2, wherein The pointer (21) comprises a collar (211) and a pointer body (212), wherein the pointer body (212) is connected to the outer periphery of the collar (211), the collar (211) is sleeved on the rotating shaft (2), and a limiting convex portion (213) is convexly provided on the inner ring of the collar (211), and the limiting convex portion (213) is plugged into and matched with the groove (23).

4. The angle detection device according to claim 3, characterized in that, The collar (211) and the rotating shaft (2) are in interference fit.

5. The angle detection device according to claim 2, characterized in that, The groove (23) is fan-shaped and plug-fits with the protrusion (33), and the distance between the two side walls of the groove (23) gradually increases along the radial direction away from the axis of the rotating shaft (2).

6. The angle detection device according to claim 5, wherein The symmetry axis of the pointer (21) coincides with the symmetry axis of the groove (23).

7. The angle detection device according to claim 6, wherein, In the first position, the pointer (21) points to the zero value of the angle scale (13).

8. The angle detection device according to any one of claims 1-7, characterized in that, One end of the rotating shaft (2) away from the motor (3) extends to the outside of the base (1) and is provided with a handle (22).

9. The angle detection device according to any one of claims 1-7, characterized in that, The base (1) is provided with a countersunk hole (15) coaxially connected to the detection hole (14); the aperture of the countersunk hole (15) is larger than the aperture of the detection hole (14); a step surface is formed at the connection between the countersunk hole (15) and the detection hole (14); a bearing (18) is installed in the countersunk hole (15), and the bearing (18) abuts against the step surface; the rotating shaft (2) passes through the detection hole (14) and is rotatably engaged with the bearing (18).

10. The angle detection device according to any one of claims 2-7, characterized in that, The rotating shaft (2) and the shaft hole (32) are clearance-matched.

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