Support for sensor detection and overspeed detection device

Abstract

A support for sensor detection comprises a support plate, a supporting leg plate is fixed to the bottom of the support plate, a mounting plate is fixed to the bottom of the supporting leg plate, and mounting holes are formed in the mounting plate. The utility model further discloses an overspeed detection device which comprises a sensor detection support used for being fixed on a motor fan shaft sleeve and further comprises a controller, a sensor and a sensor fixing support, the sensor is detachably fixed on the sensor fixing support, the sensor fixing support is detachably fixed on a motor fan shell, and the controller is arranged on the sensor fixing support. The detection end of the sensor points to the sensor detection support, and the sensor is electrically connected with the input end of the controller. The motor overspeed detection device is simple in structure and convenient to mount and dismount, and facilitates overspeed detection of the motor.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and particularly relates to a bracket for sensor detection and an overspeed detection device. Background Art

[0002] A motor is an electromagnetic device that realizes the conversion or transmission of electrical energy based on the law of electromagnetic induction. Its main function is to generate driving torque and serve as the power source for various machines. It is widely used. For example, it is installed on the electric hoist of a crane to drive the drum of the electric hoist to rotate. During the working process, if the motor runs overspeed, it is likely to affect the stable operation of the equipment and even cause safety accidents. Therefore, an overspeed switch needs to be installed. Currently, mechanical overspeed switches are mainly used on domestic cranes. Mechanical overspeed switches have disadvantages such as complex manufacturing processes, high manufacturing precision requirements, and inconvenience in adjustment. The patent with the publication number CN202625643U and the patent name "An Electronic Overspeed Switch for Cranes" discloses the working principle of the electronic overspeed switch, which is convenient for overspeed detection. However, this patent does not specifically disclose the installation position of the sensor, the position of the components used in conjunction with the sensor for detection, and the related structure. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a bracket for sensor detection and an overspeed detection device, which have a simple structure, are convenient for installation and disassembly, and are convenient for overspeed detection of the motor.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A bracket for sensor detection is used for assembling on the motor fan shaft sleeve. There are threaded holes at the end of the fan shaft sleeve, and connecting bolts are arranged in the threaded holes. A flange is fixed on the transmission shaft of the motor. The end of the fan shaft sleeve is detachably fixed on the flange through the connecting bolts. The bracket for sensor detection includes a bracket plate. Leg plates are fixed at the bottom of the bracket plate. An installation plate is fixed at the bottom of the leg plates, and installation holes are arranged on the installation plate. During installation, the bracket plate is parallel to the end face of the fan shaft sleeve, the installation plate is attached to the end face of the motor fan shaft sleeve, the installation holes correspond to the threaded holes at the end of the motor fan shaft sleeve, and the installation plate is fixed at the fan shaft sleeve through the connecting bolts.

[0006] Leg plates are fixed at the bottoms of both ends of the bracket plate.

[0007] The leg plates and the installation plate are integrally L-shaped.

[0008] Notches are arranged on the inner sides of both ends of the bracket plate, and the leg plates are fixed at the notches.

[0009] The inner and outer sides of the bracket plate are both arc-shaped, and the bracket plate is integrally in a sector ring structure.

[0010] The outrigger plate includes an upper outrigger leg fixed to the bottom of the support plate. A sliding hole with an open bottom is provided on the upper outrigger leg. A lower outrigger leg is slidably connected in the sliding hole. The mounting plate is fixed to the bottom of the lower outrigger leg. A locking bolt is threadedly connected to the upper outrigger leg, and the inner end of the locking bolt abuts against the side of the lower outrigger leg.

[0011] Scale lines are provided on the lower outrigger leg along its height direction.

[0012] An overspeed detection device includes a sensor detection bracket for being fixed on the motor fan shaft sleeve, and further includes a controller, a sensor and a sensor fixing bracket. The sensor is detachably fixed on the sensor fixing bracket, the sensor fixing bracket is detachably fixed on the motor fan housing, the detection end of the sensor points to the sensor detection bracket, and the sensor is electrically connected to the input end of the controller.

[0013] The sensor fixing bracket includes a first frame body in an L shape. The first frame body includes a vertical plate and a horizontal plate. The sensor is detachably fixed on the vertical plate. A strip-shaped first assembly hole is provided on the horizontal plate. An assembly bolt is provided in the first assembly hole, and an assembly nut is threadedly connected to the assembly bolt.

[0014] The sensor fixing bracket includes a second frame body in a U shape. The second frame body includes a top plate. The sensor is detachably fixed in the middle of the top plate. Fixing plates in an L shape are fixed at both ends of the top plate. Strip-shaped second assembly holes are provided at both ends of the fixing plate. An assembly bolt is provided in the second assembly hole, and an assembly nut is threadedly connected to the assembly bolt.

[0015] The utility model discloses a sensor detection bracket, which includes a support plate. The support plate is the plate surface for sensor detection. A support leg plate is fixed to the bottom of the support plate for support. An installation plate is fixed to the bottom of the support leg plate for being assembled on the motor fan shaft sleeve. Installation holes are provided on the installation plate, and the installation holes correspond to the threaded holes at the end of the motor fan shaft sleeve. In the middle of the existing motor fan, there is a fan shaft sleeve that cooperates with the motor transmission shaft. Wind blades are circumferentially fixed on the outer side of the fan shaft sleeve. Threaded holes are provided at the end of the fan shaft sleeve. Connecting bolts are provided in the threaded holes. A flange is fixed on the transmission shaft of the motor. The end of the fan shaft sleeve is detachably fixed on the flange through the connecting bolts. This is the structure of the existing motor. When in use, the installation plate is attached to the end of the motor fan shaft sleeve, the installation holes are aligned with the corresponding threaded holes, and then the corresponding connecting bolts are installed in the threaded holes. The connecting bolts penetrate the installation holes to complete the installation of the sensor detection bracket, without changing the structure of the motor, and it has strong adaptability.

[0016] The present utility model also discloses an overspeed detection device, which includes a bracket for sensor detection and is used to be fixed on the motor fan shaft sleeve for facilitating sensor detection. It also includes a controller, a sensor and a sensor fixing bracket. The sensor is detachably fixed on the sensor fixing bracket, and the sensor fixing bracket is detachably fixed on the motor fan housing, which is convenient for installation and disassembly. The detection end of the sensor points to the sensor detection bracket, and the sensor is electrically connected to the input end of the controller. The sensor transmits the detection signal to the controller to facilitate the overspeed detection of the motor. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the motor fan;

[0018] Figure 2 is a schematic structural diagram of the motor fan housing;

[0019] Figure 3 is a perspective view (one) of the bracket for sensor detection;

[0020] Figure 4 is a front view (one) of the bracket for sensor detection;

[0021] Figure 5 is a perspective view (two) of the bracket for sensor detection;

[0022] Figure 6 is a front view (two) of the bracket for sensor detection;

[0023] Figure 7 is a schematic structural diagram of the leg plate;

[0024] Figure 8 is a schematic structural diagram (one) of the bracket for sensor detection installed on the motor fan;

[0025] Figure 9 is a schematic structural diagram (two) of the bracket for sensor detection installed on the motor fan;

[0026] Figure 10 is a schematic structural diagram (one) of the sensor, the sensor fixing bracket and the controller;

[0027] Figure 11 is a schematic structural diagram (two) of the sensor, the sensor fixing bracket and the controller. Detailed Embodiment

[0028] Such as Figure 1 and Figure 2As shown in the figure, a blower sleeve a that mates with the motor transmission shaft is provided in the middle of the existing motor blower. Blades b are circumferentially fixed on the outer side of the blower sleeve a. Threaded holes c are provided at the ends of the blower sleeve a, and connecting bolts are provided in the threaded holes c. A flange is fixed on the transmission shaft of the motor. The end of the blower sleeve a is detachably fixed to the flange through the connecting bolts. This is the structure of the existing motor. A blower housing d is provided outside the blower, and a mesh structure e corresponding to the blower is provided on the blower housing d to facilitate ventilation.

[0029] As Figures 3 - 11 shown in the figure, a bracket for sensor detection is used to be assembled on the motor blower sleeve a. The bracket for sensor detection includes a bracket plate 1, and the bracket plate 1 is the plate surface for the sensor 11 to detect. Leg plates 2 are fixed to the bottom of the bracket plate 1 to play a supporting role. An installation plate 3 is fixed to the bottom of the leg plates 2 for assembling on the motor blower sleeve a, and installation holes 4 are provided on the installation plate 3; during installation, the bracket plate 1 is parallel to the end face of the motor blower sleeve a, the installation plate 3 is attached to the end face of the motor blower sleeve a, the installation holes 4 correspond to the threaded holes c at the end of the motor blower sleeve a, and the installation plate 3 is fixed to the blower sleeve a through connecting bolts.

[0030] Leg plates 2 are fixed to the bottoms of both ends of the bracket plate 1 to facilitate the relatively stable fixation of the bracket for sensor detection.

[0031] The leg plates 2 and the installation plate 3 are integrally in an L shape for easy assembly. If the installation method of the leg plates 2 and the installation plate 3 is simply changed to make it in a T shape or other structures, it also belongs to the protection scope of the present utility model.

[0032] Notches 5 are provided on the inner sides of both ends of the bracket plate 1, and the leg plates 2 are fixed at the notches 5.

[0033] The inner side and the outer side of the bracket plate 1 are both arc-shaped, and the bracket plate 1 is integrally in a fan-shaped ring structure, which adapts to the shape of the blower sleeve a and is convenient for shielding a part of the blower sleeve a.

[0034] The leg plates 2 include upper leg parts 6 fixed to the bottom of the bracket plate 1. Sliding holes with open bottoms are provided on the upper leg parts 6, and lower leg parts 8 are slidably connected in the sliding holes. The lower leg parts 8 can slide up and down along the sliding holes to facilitate adjusting the length of the leg plates 2 to meet different installation requirements. The installation plate 3 is fixed to the bottom of the lower leg parts 8, and the installation plate 3 can move up and down with the lower leg parts 8; a locking bolt 7 is threadedly connected to the upper leg parts 6, and the inner end of the locking bolt 7 abuts against the side surface of the lower leg parts 8. During the installation process, when it is necessary to adjust the detection distance and adjust the height of the leg plates 2, loosen the locking bolt 7, slide the lower leg parts 8 up and down along the sliding holes to a suitable position, and then tighten the locking bolt 7 to lock the position of the lower leg parts 8.

[0035] The lower leg portion 8 is provided with scale lines 9 arranged along its height direction. The scale lines 9 are preferably arranged on the outer side surface of the lower leg portion 8, which is convenient for observing the extended length of the lower leg portion 8, facilitating the adjustment of the two leg plates 2 to the same height, and making the support plate 1 parallel to the end face of the motor fan shaft sleeve a.

[0036] An overspeed detection device includes a sensor detection support for being fixed on the motor fan shaft sleeve a, and further includes a controller 10, a sensor 11, and a sensor fixing bracket. The sensor 11 is detachably fixed on the sensor fixing bracket, and the sensor fixing bracket is detachably fixed on the motor fan housing d, which is convenient for installation and disassembly. The detection end of the sensor 11 points to the sensor 11 detection support, which is convenient for the sensor 11 to detect. The sensor 11 is electrically connected to the input end of the controller 10. The sensor 11 feeds back the detected signal to the controller 10. The controller 10 compares the calculated value with the set rotational speed. The controller 10 is also electrically connected to the control system of the motor. When the controller 10 detects that the rotational speed of the motor exceeds the set value, the controller 10 gives a signal to the control system of the motor, and the motor control system controls the motor to stop working. The sensor 11 can adopt conventional sensors 11 in the form of diffuse reflection, Hall, magnetic, etc. The controller 10 can adopt a single-chip microcomputer controller 10, such as the STM32F103 series single-chip microcomputer with built-in high-speed pulse acquisition, or other conventional single-chip microcomputer controllers 10.

[0037] The sensor fixing bracket includes a first frame body 16 in an L shape. The first frame body 16 includes a vertical plate 17 and a horizontal plate 18. The sensor 11 is detachably fixed on the vertical plate 17, which is convenient for installation and disassembly. A strip-shaped first assembly hole 19 is provided on the horizontal plate 18. An assembly bolt is arranged in the first assembly hole 19, and an assembly nut is threadedly connected to the assembly bolt, which is convenient for detachably fixing the horizontal plate 18 at the mesh structure e of the fan housing d.

[0038] The sensor fixing bracket includes a second frame body 12 in a several-character shape. The second frame body 12 includes a top plate 13. The sensor 11 is detachably fixed in the middle of the top plate 13. Fixing plates 14 in an L shape are fixed at both ends of the top plate 13. Strip-shaped second assembly holes 15 are provided at both ends of the fixing plates 14. An assembly bolt is arranged in the second assembly holes 15, and an assembly nut is threadedly connected to the assembly bolt, which is convenient for detachably fixing the fixing plates 14 at the mesh structure e of the fan housing d.

[0039] During installation, first, the sensor detection support is arranged at the end of the motor fan shaft sleeve a. The support plate 1 is parallel to the end face of the motor fan shaft sleeve a, and the mounting plate 3 is attached to the end face of the motor fan shaft sleeve a. When there are four threaded holes c at the end of the motor fan shaft sleeve a, such as Figure 8As shown, the mounting holes 4 on the two mounting plates 3 are respectively aligned with the two opposite threaded holes c. When there are three threaded holes c at the end of the motor fan shaft sleeve a, as Figure 9 shown, the mounting holes 4 on the two mounting plates 3 are respectively aligned with the two adjacent threaded holes c. The connecting bolts are arranged in the threaded holes c. A flange is fixed on the transmission shaft of the motor, and the end of the fan shaft sleeve a is detachably fixed on the flange through the connecting bolts, which also realizes the detachable installation of the bracket for sensor detection. Then, the sensor fixing bracket with the sensor 11 fixed is detachably fixed at the mesh structure e of the fan housing d through the assembly bolts and assembly nuts. The sensor fixing bracket is arranged outside the motor without changing the existing structure of the motor. Finally, the controller 10 is fixed outside the motor.

[0040] During use, the bracket for sensor detection rotates with the rotation of the transmission shaft of the motor. The distance between the bracket plate 1 and the end face of the motor fan shaft sleeve a from the distance sensor 11 is different. When the bracket plate 1 passes by the sensor 11, the sensor 11 can detect the bracket plate 1. Each time the transmission shaft of the motor rotates one circle, it is detected once. The sensor 11 feeds back the signal to the controller 10. The controller 10 calculates the speed of the motor based on the frequency of the bracket plate 1 passing by the sensor 11 and compares it with the set speed value. When it exceeds the set value, the controller 10 gives a signal to the control system of the motor, and the motor control system controls the motor to stop working.

[0041] The above embodiments are illustrative of the present invention, not limiting of the present invention. Any solution obtained by simply transforming the present invention belongs to the protection scope of the present invention.

Claims

1. A sensor detection bracket, used for assembly on the motor fan sleeve, the end of the fan sleeve is provided with a threaded hole, a connecting bolt is provided in the threaded hole, a flange is fixed on the transmission shaft of the motor, and the end of the fan sleeve is detachably fixed on the flange by the connecting bolt, characterized in that: The sensor detection bracket includes a bracket plate, a leg plate is fixed at the bottom of the bracket plate, a mounting plate is fixed at the bottom of the leg plate, and a mounting hole is provided on the mounting plate; during installation, the bracket plate is parallel to the end face of the fan shaft sleeve, the mounting plate is fitted with the end face of the motor fan shaft sleeve, the mounting hole corresponds to the threaded hole at the end of the motor fan shaft sleeve, and the mounting plate is fixed to the fan shaft sleeve by connecting bolts.

2. The sensor detection bracket according to claim 1, characterized in that: The bottoms of both ends of the bracket plate are fixed with outrigger plates.

3. The sensor detection bracket according to claim 2, characterized in that: The leg plate and the mounting plate are L-shaped as a whole.

4. The sensor detection bracket according to claim 2, characterized in that: Notches are arranged on the inner sides of both ends of the bracket plate, and the leg plates are fixed at the notches.

5. The sensor detection bracket according to claim 1, characterized in that: The inner side and the outer side of the bracket plate are both arc-shaped, and the bracket plate as a whole is a fan-ring structure.

6. The sensor detection bracket according to claim 1, characterized in that: The leg plate includes an upper leg portion fixed to the bottom of the bracket plate, the upper leg portion is provided with a sliding hole with an open bottom, the lower leg portion is slidably connected in the sliding hole, and the mounting plate is fixed to the bottom of the lower leg portion; a locking bolt is threadedly connected to the upper leg portion, and the inner end of the locking bolt is tightened against the side of the lower leg portion.

7. The sensor detection bracket according to claim 6, characterized in that: The lower leg portion is provided with scale lines arranged along the height direction thereof.

8. An overspeed detection device, characterized in that: It includes the sensor detection bracket for fixing on the motor fan shaft sleeve as described in any one of claims 1 to 7, and also includes a controller, a sensor and a sensor fixing bracket, the sensor is detachably fixed on the sensor fixing bracket, the sensor fixing bracket is detachably fixed on the motor fan casing, the detection end of the sensor points to the sensor detection bracket, and the sensor is electrically connected to the input end of the controller.

9. The overspeed detection device according to claim 8, characterized in that: The sensor fixing bracket includes an L-shaped first frame body, which includes a vertical plate and a horizontal plate. The sensor is detachably fixed on the vertical plate. The horizontal plate is provided with a first strip-shaped assembly hole, in which an assembly bolt is provided, and an assembly nut is threadedly connected to the assembly bolt.

10. The overspeed detection device according to claim 8, characterized in that: The sensor fixing bracket includes a second frame body in the shape of a Chinese character "X", the second frame body includes a top plate, the sensor is detachably fixed in the middle of the top plate, L-shaped fixing plates are fixed at both ends of the top plate, and second strip-shaped assembly holes are provided at both ends of the fixing plate, and assembly bolts are provided in the second assembly holes, and assembly nuts are threadedly connected to the assembly bolts.

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