Locked-rotor current detection device for motor

Abstract

The utility model discloses a locked-rotor current detection device for a motor, which comprises a carrying and moving mechanism, the carrying and moving mechanism comprises a front-and-back moving assembly and a left-and-right moving assembly, the left-and-right moving assembly is arranged on the front-and-back moving assembly, and a plurality of carrying jigs are arranged on the left-and-right moving assembly. The carrying jig clamps the motor finished product and moves front and back and left and right in the horizontal direction. The locked-rotor current detection mechanism comprises a detection plate, a clamping assembly and a lifting assembly, the motor finished product clamped by the carrying jig is placed on the detection plate, the clamping assembly and the lifting assembly are arranged above and below the detection plate respectively, the clamping assembly is used for clamping a machine shell and an output shaft of the motor finished product, and the lifting assembly is used for lifting the motor finished product. The lifting assembly is provided with a detection head, the height of the lifting assembly can be adjusted to make contact with a terminal of a motor finished product, and the detection head is electrically connected with an external detector. According to the device, whether the locked-rotor current of a finished motor is qualified or not can be rapidly detected by combining the locked-rotor current detection mechanism with an external detector.

Description

Technical Field

[0001] The utility model relates to the technical field of partial improvement design of motor product quality inspection equipment, and particularly relates to a device for detecting the locked-rotor current of a motor. Background Art

[0002] Micro motors are commonly used in control systems or drive mechanical loads to achieve functions such as detection, analysis and operation, amplification, execution or conversion of mechanical and electrical signals or energy. For the detection of the locked-rotor current (commonly known as the stuck current) of micro motors, currently, a simple tooling is used to fix a single motor, and then an operator manually holds a detection head to connect the power supply of the motor, and observes the value displayed on the detector to judge whether it is qualified. There are situations where the measurement is inaccurate, and at the same time, the detection efficiency is low and the labor cost is high, and it cannot be quickly detected in an assembly line manner.

[0003] In the prior art, the patent with the publication number CN211121360U discloses an auxiliary device for detecting the torque and locked-rotor current of a synchronous motor. In two first test benches and second test benches that are mirror-symmetrical to each other and do not connect to each other, an integrally formed connecting part is provided, so that the grooves in the first test bench and the second test bench and the connecting part jointly form a test slot. The test slot can be used to place the synchronous motor, and the test slot is provided with a fixing slot whose shape matches the fixing part of the synchronous motor, and a first connecting hole is provided in the fixing slot, and the fixing part of the synchronous motor can be fixed to the first connecting hole with a fixing piece, realizing the fixation of the synchronous motor, thereby providing a fixed installation structure for the synchronous motor test and providing a hardware basis for the synchronous motor to complete the test without deviation.

[0004] The patent with the publication number CN214225355U discloses a motor detection device and a motor detection system. Among them, the motor detection device includes a motor drive detector and a limiter. The motor drive detector detects the drive voltage of the motor and outputs the corresponding drive voltage to drive the motor to rotate. At the same time, the motor driver also detects the current of the motor after driving the motor to work. After the motor rotates, the limiter limits the rotation of the rotor of the motor, so that after the motor is powered on, it has two states of operation and locked rotation, so that the motor drive detector can detect the operating current and the locked-rotor current of the motor. The motor detection device of the utility model automatically detects the drive voltage of the motor and synchronously detects the locked-rotor current and the torsional current, which is beneficial to improving the detection efficiency of the motor.

[0005] In order to solve one of the above problems, the present application provides a device for detecting the locked-rotor current of a motor. Content of the Utility Model

[0006] The purpose of this invention is to solve the problems existing in the prior art by proposing a device for detecting the stall current of a motor. By combining the stall current detection mechanism with an external testing instrument, the stall current of the finished motor can be quickly detected to determine whether it is qualified.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a device for detecting stall current of a motor, comprising a conveying and moving mechanism, wherein the conveying and moving mechanism comprises a front-to-back moving component and a left-to-right moving component, the left-to-right moving component is mounted on the front-to-back moving component, and a plurality of conveying jigs are provided on the left-to-right moving component, the conveying jigs clamp the finished motor and move it back and forth and left and right in the horizontal direction.

[0008] The current detection mechanism for stalled motors includes a detection plate, a clamping assembly, and a lifting assembly. The finished motor, held by a transport fixture, is placed on the detection plate. The clamping assembly and the lifting assembly are respectively located above and below the detection plate. The clamping assembly is used to clamp the housing and output shaft of the finished motor. The lifting assembly is equipped with a detection head that can be adjusted in height to contact the terminals of the finished motor. The detection head is electrically connected to an external testing instrument.

[0009] Furthermore, as described above, the forward and backward moving assembly includes a third cylinder and a forward and backward moving plate, the forward and backward moving plate being fixed on the telescopic shaft of the third cylinder, and the third cylinder being mounted on the third fixed plate.

[0010] Furthermore, as described above, the left and right moving assembly includes a fourth cylinder and a left and right moving plate. The left and right moving plate is connected to an intermediate plate, the intermediate plate is fixed on the telescopic shaft of the fourth cylinder, and the fourth cylinder is mounted on a fourth fixed plate.

[0011] Furthermore, as described above, the front and rear moving plates are fixed on the third slider, the third slider is slidably mounted on the third linear guide rail, and the third linear guide rail is fixed on the second vertical plate; the left and right moving plates are fixed on the fourth slider, the fourth slider is slidably mounted on the fourth linear guide rail, and the fourth linear guide rail and the fourth fixed plate are both fixed on the front and rear moving plates.

[0012] Furthermore, as described above, the clamping assembly includes a housing clamping assembly and an output shaft clamping assembly. The housing clamping assembly includes a clamping block that can move back and forth. A baffle is fixed on the detection plate and is disposed opposite to the clamping block. The finished motor is located between the baffle and the clamping block. The output shaft clamping assembly includes a clamp suspended on the detection plate, which clamps or releases the output shaft.

[0013] Furthermore, as described above, a support plate is fixed on the baffle. The housing clamping assembly also includes a second fixed plate and a sliding sleeve mounted on the support plate. Front and rear cylinders are mounted on the second fixed plate. The front and rear cylinders drive the slide plate to move linearly in the horizontal direction. The slide plate is slidably disposed in the sliding sleeve and fixedly connected to the clamping block.

[0014] Furthermore, the output shaft clamping assembly described above also includes a clamp cylinder, with a clamp located below the clamp cylinder and fixed to the mounting plate. The mounting plate is located on the fourth upright plate, which is fixed to the support plate.

[0015] Furthermore, as described above, the lifting assembly includes a first fixed plate, a connector is disposed on the first fixed plate, the first fixed plate is located below the detection plate and connected to the lifting cylinder.

[0016] Furthermore, as described above, the connector is inserted into the mounting sleeve, the mounting sleeve is snapped onto the first fixed plate, the lifting cylinder is fixed onto the third upright plate, the third upright plate is mounted on the base plate, and the detection plate is supported by a bracket.

[0017] Furthermore, as described above, the bottoms of both the conveying and moving mechanism and the stall current detection mechanism are mounted on the worktable.

[0018] Compared with the prior art, the beneficial effects of this utility model are: the structure of this device is ingenious and the operation is simple. The addition of the stall current detection mechanism can quickly detect whether the stall current of the finished motor is qualified. First, the front and rear cylinders drive the clamping block to approach the baffle to clamp the machine housing. At the same time, the clamp cylinder drives the clamp to clamp the output shaft. Then, the lifting cylinder drives the detection head to rise to contact the terminal of the finished motor. Since the detection head is electrically connected to the external detector, the power supply inside the detector supplies power to the terminal and feeds back the stall current of the finished motor to determine whether it is qualified. Attached Figure Description

[0019] Figure 1 This is a top view of the present invention;

[0020] Figure 2 This is a perspective view of the conveying and moving mechanism of this utility model;

[0021] Figure 3 for Figure 2 An explosion diagram;

[0022] Figure 4 The three-dimensional structure of the current detection mechanism of this utility model Figure 1 ;

[0023] Figure 5 for Figure 4 An explosion diagram;

[0024] Figure 6 The three-dimensional structure of the current detection mechanism of this utility model Figure 2 ;

[0025] Figure 7 for Figure 6 The main view.

[0026] In the diagram: 2. Conveying and moving mechanism; 22. Third fixed plate; 23. Second upright plate; 24. Forward and backward moving assembly; 241. Third cylinder; 242. Third linear guide rail; 243. Third slider; 244. Forward and backward moving plate; 25. Fourth fixed plate; 26. Left and right moving assembly; 261. Fourth cylinder; 262. Fourth linear guide rail; 263. Fourth slider; 264. Left and right moving plate; 265. Intermediate plate; 28. Handling fixture; 280. Gripper; 281. Positioning sleeve; 282. Fixed sleeve; 4. Finished motor. 9. Detection mechanism for stall current; 91. Lifting assembly; 910. Base plate; 911. Third upright plate; 912. Lifting cylinder; 913. First fixed plate; 914. Mounting sleeve; 915. Detection head; 92. Detection plate; 93. Baffle; 94. Support plate; 95. Housing clamping assembly; 950. Front and rear cylinders; 951. Second fixed plate; 952. Sliding sleeve; 953. Slide plate; 954. Clamping block; 96. Output shaft clamping assembly; 960. Fourth upright plate; 961. Mounting plate; 962. Clamping cylinder; 963. Clamp. Detailed Implementation

[0027] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "fixed," "installed," "connected," "set," etc., should be interpreted broadly. For example, when an element is said to be "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "installed" on another element, it can be directly installed on the other element or there may be an intervening element. When an element is said to be "connected" to another element, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within the two elements.

[0029] Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example 1

[0032] Reference Figure 1-7 As shown, this utility model discloses a device for detecting stall current in a motor, comprising a conveying and moving mechanism 2, which includes a front-to-back moving component 24 and a left-to-right moving component 26. The left-to-right moving component 26 is mounted on the front-to-back moving component 24, and at least two conveying jigs 28 are provided on the left-to-right moving component 26. The conveying jigs 28 clamp the finished motor 4 and move it horizontally back-to-back and left-to-right. A stall current detection mechanism 9 includes a detection plate 92, a clamping component, and a lifting component 91. The finished motor 4, clamped by the conveying jigs 28, is placed on the detection plate 92. The clamping component and the lifting component 91 are respectively located above and below the detection plate 92. The component is used to clamp the housing and output shaft of the finished motor 4. This prevents the output shaft and housing from rotating relative to each other when the finished motor 4 is powered on, thus generating a stall current (commonly known as a jamming current). The lifting assembly 91 is equipped with a detection head 915, which can be adjusted in height to contact the terminals of the finished motor 4. The detection plate 92 has through holes. When the terminals are in the through holes, they can contact the raised detection head 915. The detection head 915 is electrically connected to an external detector. The detector has an internal power supply. After the detection head 915 contacts the terminals, it can supply power to the finished motor 4. The detector can then determine whether the stall current of the finished motor 4 is qualified based on the power feedback data. The detector is a device of existing mature technology and will not be described in detail here.

[0033] This device is suitable for detecting the stall current value of small or micro motor finished products 4. When the conveying and moving mechanism 2 transports the motor finished product 4 to the detection plate 92 of the stall current detection station, the stall current detection mechanism 9 starts to work. First, the clamping component starts to work and clamps the housing and the output shaft at the same time. Then, the lifting component 91 drives the detection head 915 to rise to contact the terminals of the motor finished product 4. Since the detection head 915 is electrically connected to the external tester, the power supply inside the tester supplies power to the terminals and feeds back the stall current of the motor finished product 4 to determine whether it is qualified.

[0034] Example 2

[0035] Reference Figure 1-7 As shown, based on the technical solution of Embodiment 1, a device for detecting stall current in a motor, for the specific structure of the conveying and moving mechanism 2, is as follows: Figure 2-3 It is understood that the forward and backward moving assembly 24 includes a third cylinder 241 and a forward and backward moving plate 244. The forward and backward moving plate 244 is fixed on the telescopic shaft of the third cylinder 241. The third cylinder 241 is mounted on the third fixed plate 22. The third cylinder 241 pushes the forward and backward moving plate 244 to move forward or backward. In addition, the left and right moving assembly 26 includes a fourth cylinder 261 and a left and right moving plate 264. The left and right moving plate 264 is connected to an intermediate plate 265. The intermediate plate 265 is fixed on the telescopic shaft of the fourth cylinder 261. The fourth cylinder 261 is mounted on the fourth fixed plate 25. The fourth cylinder 261 pushes the intermediate plate 265 to move left and right, thereby driving the left and right moving plate 264 to move linearly to the left or right. To ensure the directional linear motion of the front-to-back moving plate 244 and the left-to-right moving plate 264, the front-to-back moving plate 244 is fixed on the third slider 243, which is slidably mounted on the third linear guide rail 242, which is fixed on the second upright plate 23; the left-to-right moving plate 264 is fixed on the fourth slider 263, which is slidably mounted on the fourth linear guide rail 262, and both the fourth linear guide rail 262 and the fourth fixed plate 25 are fixed on the front-to-back moving plate 244.

[0036] Furthermore, the transport fixture 28 includes a gripper 280, with a positioning sleeve 281 below the gripper 280 and mounted on the left and right moving plates 264 via a fixing sleeve 282. One end of the gripper 280 is partially covered by the sleeve, which connects to the left and right moving plates 264 and abuts one end of the gripper against the upper surface of the plates 264. The other end of the gripper is a semi-circular groove that matches the outer diameter of the finished motor 4. The positioning sleeve 281 is added to lift and support the bottom of the finished motor 4, and also to position and limit the terminals at the bottom of the finished motor 4, facilitating subsequent testing operations. In addition, the bottoms of the transport mechanism 2 and the stall current detection mechanism 9 are both mounted on a workbench. The workbench, as part of the motor testing equipment, provides installation space for mechanisms at various subsequent testing stations.

[0037] Example 3

[0038] Reference Figure 1-7 As shown, based on the technical solution of the above embodiments, a device for detecting stall current in a motor, with regard to the specific structure of the stall current detection mechanism 9, is as follows: Figure 4-7It is understood that the clamping assembly includes a housing clamping assembly 95 and an output shaft clamping assembly 96. The housing clamping assembly 95 includes a clamping block 954 that can move back and forth. The part of the clamping block 954 that contacts the housing is designed to be arc-shaped. The clamping block 954 is generally L-shaped, with the part that contacts the housing located at the lower end. A baffle 93 is fixed on the detection plate 92 and is arranged opposite to the clamping block 954. The finished motor 4 is located between the baffle 93 and the clamping block 954. The position of the baffle 93 is fixed. When the clamping block 954 is close to the baffle 93, the two clamp the housing tightly. Conversely, when the clamping block 954 is away from the baffle 93, the housing is released and will not touch the clamping block 954. Figure 6 As shown. In addition, a support plate 94 is fixed on the baffle 93. The housing clamping assembly 95 also includes a second fixing plate 951 and a sliding sleeve 952 installed on the support plate 94. Front and rear cylinders 950 are installed on the second fixing plate 951. The front and rear cylinders 950 drive the slide plate 953 to move linearly in the horizontal direction. The slide plate 953 is slidably disposed in the sliding sleeve 952 and fixedly connected to the clamping block 954. The sliding sleeve 952 plays a guiding and supporting role for the slide plate 953, and can indirectly drive the clamping block 954 to move linearly.

[0039] Furthermore, the output shaft clamping assembly 96 includes a clamp 963 suspended on the detection plate 92. The clamp 963 clamps or releases the output shaft. Additionally, the output shaft clamping assembly 96 also includes a clamp cylinder 962. The clamp 963 is positioned below the clamp cylinder 962 and fixed to a mounting plate 961. The mounting plate 961 is mounted on a fourth upright plate 960, which is fixed to a support plate 94. To prevent the clamp 963 from interfering with the linear transport of the finished motor 4 on the detection plate 92, the clamping direction of the clamp 963 is offset from the transport direction of the finished motor 4. Therefore, a relief groove matching the release of the clamp 963 needs to be machined on the support plate 94. Figure 5 As shown.

[0040] Furthermore, the lifting assembly 91 includes a first fixing plate 913, with a connector disposed on the first fixing plate 913. The first fixing plate 913 is located below the detection plate 92 and connected to the lifting cylinder 912. Additionally, the connector is inserted into a mounting sleeve 914, which is snapped onto the first fixing plate 913. The mounting sleeve 914 is made of insulating material. Corresponding through holes are machined on the first fixing plate 913 to accommodate the mounting sleeve 914. The lifting cylinder 912 is fixed to a third upright plate 911, which is mounted on a base plate 910. The detection plate 92 is supported by a bracket, which is a support component for other positions of the motor testing equipment and is omitted from the drawing.

[0041] Working principle: For the conveying and moving mechanism 2, the forward and backward moving component 24 first moves forward to its position, causing the conveying fixture 28 to hold the finished motor 4. Then, the left and right moving component 26 moves to the left to move the finished motor 4 to the stall current detection station to work in conjunction with the stall current detection mechanism 9 (the detection equipment has multiple detection stations with different functions). After being moved to its position, the finished motor 4 is located on the detection plate 92. After the stall current detection operation is completed, the forward and backward moving component 24 and the left and right moving component 26 are reset, and the entire operation process is completed. The next operation process is repeated. Regarding the operation of the stall current detection mechanism 9, when the conveying and moving mechanism 2 transports the finished motor 4 to the detection plate 92 at the stall current detection station, the front and rear cylinders 950 first start working, the slide plate 953 moves backward, which in turn drives the clamping block 954 to approach the baffle 93 to clamp the housing. At the same time, the clamp cylinder 962 drives the clamp 963 to retract inward to clamp the output shaft. Then, the lifting cylinder 912 drives the detection head 915 to rise until it contacts the terminal of the finished motor 4. Since the detection head 915 is electrically connected to the external detector, the power supply inside the detector supplies power to the terminal and feeds back the stall current of the finished motor 4 to determine whether it is qualified.

[0042] In this utility model device, the assembly and coordination relationships of the various components, the cylinder and the detector and their supporting control software are existing technologies or materials, and the relevant technical personnel can directly purchase or order them from the market according to the required product model and specifications.

[0043] All electrical components mentioned in the text are connected to an external main controller and 220V AC mains power or industrial power. The main controller can be a conventional known device such as a computer that plays a control role.

[0044] The above description is merely a preferred embodiment of this utility model, and common knowledge regarding specific structures and characteristics is not described in detail here. It is obvious to those skilled in the art that this utility model is not limited to the details of the above embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the protection scope of this utility model.

Claims

1. A device for detecting a locked-rotor current for an electric machine, characterized by, The conveying moving mechanism (2) comprises a front-back moving assembly (24) and a left-right moving assembly (26), the left-right moving assembly (26) is installed on the front-back moving assembly (24), and a plurality of conveying jigs (28) are arranged on the left-right moving assembly (26); the conveying jigs (28) clamp the motor finished product (4) and move in the horizontal direction forward and backward and left and right; The blocking rotation current detecting mechanism (9) comprises a detection plate (92), a clamping assembly and a lifting assembly (91), the motor finished product (4) clamped by the conveying jig (28) is arranged on the detection plate (92), the clamping assembly and the lifting assembly (91) are arranged above and below the detection plate (92) respectively, the clamping assembly is used for clamping the shell and the output shaft of the motor finished product (4), the lifting assembly (91) is provided with a detection head (915) and can adjust the height to contact the terminal of the motor finished product (4), and the detection head (915) is electrically connected with an external detector.

2. A device for detecting locked-rotor current for an electric machine according to claim 1, characterized in that, The front-back moving assembly (24) comprises a third cylinder (241) and a front-back moving plate (244), the front-back moving plate (244) is fixed on the telescopic shaft of the third cylinder (241), and the third cylinder (241) is installed on the third fixed plate (22).

3. A device for detecting a blocked-rotor current for an electric machine according to claim 2, characterized in that, The left-right moving assembly (26) comprises a fourth cylinder (261) and a left-right moving plate (264), the left-right moving plate (264) is connected with an intermediate plate (265), the intermediate plate (265) is fixed on the telescopic shaft of the fourth cylinder (261), and the fourth cylinder (261) is installed on the fourth fixed plate (25).

4. A device for detecting locked-rotor current for an electric motor according to claim 3, wherein The front-back moving plate (244) is fixed on the third sliding block (243), the third sliding block (243) is slidably arranged on the third linear guide rail (242), and the third linear guide rail (242) is fixed on the second vertical plate (23); the left-right moving plate (264) is fixed on the fourth sliding block (263), the fourth sliding block (263) is slidably arranged on the fourth linear guide rail (262), and the fourth linear guide rail (262) and the fourth fixed plate (25) are both fixed on the front-back moving plate (244).

5. A device for detecting locked-rotor current for an electric motor according to claim 1, wherein The clamping assembly comprises a shell clamping assembly (95) and an output shaft clamping assembly (96), the shell clamping assembly (95) comprises a clamping block (954) which can move forward and backward, the detection plate (92) is fixed with a baffle (93) which is arranged opposite to the clamping block (954), and the motor finished product (4) is located between the baffle (93) and the clamping block (954); the output shaft clamping assembly (96) comprises a clamp (963) which is suspended on the detection plate (92) and clamps or releases the output shaft.

6. A device for detecting locked-rotor current for an electric machine according to claim 5, wherein The baffle (93) is fixed with a support plate (94), the shell clamping assembly (95) further comprises a second fixed plate (951) and a sliding sleeve (952) which are installed on the support plate (94), the second fixed plate (951) is installed with a front-back cylinder (950), the front-back cylinder (950) drives a sliding plate (953) to move linearly in the horizontal direction, the sliding plate (953) is slidably arranged in the sliding sleeve (952) and is fixedly connected with the clamping block (954).

7. A device for detecting a blocked-rotor current for an electric machine according to claim 6, characterized in that, The output shaft clamping assembly (96) further comprises a clamp cylinder (962), a clamp (963) is arranged below the clamp cylinder (962) and is fixed on a mounting plate (961), the mounting plate (961) is arranged on a fourth vertical plate (960), and the fourth vertical plate (960) is fixed on the support plate (94).

8. A device for detecting locked-rotor current for an electric machine according to claim 1, wherein The lifting assembly (91) comprises a first fixing plate (913), a connecting head is arranged on the first fixing plate (913), the first fixing plate (913) is located below the detection plate (92) and is connected with the lifting cylinder (912).

9. A device for detecting a blocked-rotor current for an electric machine according to claim 8, characterized in that, The connecting head is inserted into a mounting sleeve (914), the mounting sleeve (914) is clamped on the first fixing plate (913), the lifting cylinder (912) is fixed on a third vertical plate (911), the third vertical plate (911) is mounted on a bottom plate (910), and the detection plate (92) is supported by a support.

10. A device for detecting a blocked-rotor current for an electric machine according to any one of claims 1-9, characterized in that, The bottom of the conveying movement mechanism (2) and the plugging current detection mechanism (9) are mounted on a workbench.

Images