Angle sensor

Abstract

The utility model is suitable for the field of detection equipment, and provides an angle sensor which comprises a sensor, a rotating shaft is arranged in the sensor in a penetrating manner, and the sensor is connected to a fixing assembly; the fixing assembly comprises a positioning plate which is coaxially arranged with the rotating shaft, and an elastic piece is arranged between the rotating shaft and the shaft to be detected so as to buffer the non-coaxial offset of the sensor and the shaft to be detected; one end of the installation positioning piece is connected with the axis of the positioning plate, and the other end of the installation positioning piece is connected with the center of the shaft to be detected, so that the sensor and the shaft to be detected are adjusted to be coaxial, and therefore, coaxial installation of the sensor and the shaft to be detected is realized through the positioning mechanism; alignment difficulty during installation of the angle sensor is reduced, and measurement precision of the angle sensor is improved.

Description

Technical Field

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

[0002] Angle sensors are used to measure precision detection components related to angles. In most cases, they are used to detect the rotation angle of shaft components.

[0003] Among them, during the installation and use of the angle sensor, it is necessary to ensure that its input end is coaxially positioned with the shaft component to ensure the accuracy of the detected value; however, due to the inevitable positioning deviation in the actual assembly process, most of the existing angle sensor installation methods are direct assembly methods, that is, the input end of the angle sensor is fixedly connected to the end of the shaft component, and the existence of positioning deviation will lead to increased wear between the rotating pairs and even damage to the angle sensor.

[0004] However, how to ensure the accurate zeroing of the angle sensor and the coaxiality and buffering adjustment of the equipment during assembly is a difficult problem to overcome.

[0005] As is known from the above, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. An angle sensor is proposed to address the above problems. Utility Model Content

[0006] In view of the above-mentioned defects, the purpose of the utility model is to provide an angle sensor, which realizes coaxial installation of the sensor and the axis to be measured through a positioning mechanism, and also provides an elastic member for buffering between the sensor and the axis to be measured during use, and also provides a zeroing structure for the sensor, thereby providing an angle sensor.

[0007] In order to achieve the above-mentioned purpose, the utility model provides an angle sensor, including a sensor, a rotating shaft is passed through the sensor, and the sensor is connected to a fixed component.

[0008] The fixing assembly comprises a positioning plate coaxially arranged with the rotating shaft, and an elastic member is arranged between the rotating shaft and the axis to be measured to buffer the offset of the sensor and the axis to be measured.

[0009] One end of the mounting positioning piece is connected to the axis of the positioning plate, and the other end is connected to the center of the axis to be measured, so as to adjust the sensor to be coaxial with the axis to be measured.

[0010] According to the angle sensor described in the utility model, a sealing assembly is arranged on the rotating shaft, and the sealing assembly includes an O-ring arranged between the sleeve and the rotating shaft, a flat washer is arranged on the outside of the O-ring, and an open retaining ring is arranged on the outside of the flat washer.

[0011] According to the angle sensor of the utility model, a sleeve is provided between the rotating shaft and the sensor, one end of the rotating shaft is connected to the shaft to be measured, and the other end of the rotating shaft is ringed with the magnet seat.

[0012] According to the angle sensor of the utility model, a cavity is provided in the magnet seat, and a magnet is provided in the cavity.

[0013] According to the angle sensor of the utility model, a circuit board is provided on the side of the magnet seat away from the rotating shaft, and pins are provided on the circuit board.

[0014] According to the angle sensor of the utility model, a diaphragm is provided between the circuit board and the magnet seat, and an upper cover is provided between the circuit board and the sensor housing.

[0015] The utility model provides an angle sensor, which has the following beneficial effects:

[0016] The utility model provides an angle sensor, including a shaft to be measured and a sensor located at one side end thereof, wherein a rotating part is eccentrically arranged at the end of the shaft to be measured, and the rotating part is a dial shaft, and a shaft end baffle is coaxially fixedly connected to the end of the shaft to be measured, and a first positioning hole at the end of the shaft to be measured and a second positioning hole and a positioning part are arranged at the center of the shaft end baffle, so as to coaxially position the shaft end baffle and the shaft to be measured; a counterweight part eccentrically arranged on the shaft end baffle drives the shaft end baffle to rotate, and after adjusting its center of gravity, the counterweight part is used to adjust the center of gravity of the shaft end baffle to achieve vertical positioning, and the sensor and the positioning plate are connected in this positioning state; the positioning plate is used to assist the angle sensor in center positioning, and the angle sensor is supported and fixed by the sensor bracket, so as to have strong stability; the positioning plate is positioned by the positioning mechanism and the shaft to be measured, and the angle sensor is coaxially centered with the shaft to be measured by the positioning plate, so as to reduce the difficulty of aligning the angle sensor during installation and improve the measurement accuracy of the angle sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the main support;

[0019] Figure 3 is a cross-sectional view at the sensor;

[0020] Figure 4 It is a schematic diagram of the structure of the reinforcement seat;

[0021] Figure 5 It is a structural schematic diagram of the positioning plate;

[0022] Figure 6 It is a structural schematic diagram of the sensor bracket;

[0023] Figure 7 It is a schematic diagram of the structure at the arc groove;

[0024] Figure 8 It is a schematic diagram of the structure at the rotating axis;

[0025] Fig. 9 for Figure 1 Schematic diagram of the structure;

[0026] Fig.10 yes Fig. 9 The structural diagram of part A in the figure;

[0027] Fig.11 It is a schematic diagram of the structure at the positioning piece;

[0028] Fig.12 yes Fig.11 A cross-sectional view of the middle C portion;

[0029] In the figure: 00-main bracket, 1-axis to be measured, 10-first positioning hole, 11-rotating part, 12-matching part, 13-activity space, 2-sensor, 21-rotating shaft, 211-sleeve, 22-arc groove, 23-magnet seat, 231-magnet, 24-circuit board, 241-diaphragm, 251-O-ring, 252-flat washer, 253-open retaining ring, 3-axis end baffle, 31-second positioning hole, 32-mounting hole, 4-fixing part, 5-sensor bracket, 51-second U-shaped groove, 6-positioning part, 7-positioning plate, 71-first U-shaped groove, 101-upper cover, 102-reinforcement seat. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0031] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0032] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0033] See also Figures 1 to 8 The utility model provides an angle sensor, including a sensor 2, wherein a rotating shaft 21 is passed through the sensor 2, a sealing assembly is arranged on the rotating shaft 21, a sleeve 211 is arranged between the rotating shaft 21 and the sensor 2, one end of the rotating shaft 21 is connected to the shaft 1 to be measured, and the other end of the rotating shaft 21 is arranged on the magnet seat 23, a cavity is arranged in the magnet seat 23, a magnet 231 is arranged in the cavity, a circuit board 24 is arranged on the side of the magnet seat 23 away from the rotating shaft 21, a pin is arranged on the circuit board 24, a diaphragm 241 is arranged between the circuit board 24 and the magnet seat 23, an upper cover 101 is arranged between the circuit board 24 and the housing of the sensor 2, and reinforcement seats 102 are arranged on both sides of the sensor 2, the rotating shaft 21 rotates to drive the magnet 231 to rotate, the rotation of the magnet 231 generates a changing magnetic field, and the Hall chip generates an electrical signal according to the changing magnetic field, and the electrical signal corresponds to the rotation angle of the shaft 1 to be measured, so that the angle sensor can measure the rotation angle of the shaft 1 to be measured.

[0034] Preferably, the upper cover 101 of the present invention is a cylindrical frustum structure, and the upper cover 101 abuts against the circuit board 24 after installation, thereby improving the stability of the circuit board 24 and the measurement accuracy at the axial position of the rotating shaft 21 .

[0035] See also Figure 3 Preferably, the magnet 231 described in the utility model is a bar magnet. The bar magnet is longer, and the curvature of the magnetic lines of force generated by it passing through the Hall chip is smaller, which improves the sensitivity of the angle sensor. The active surface of the bar magnet is rectangular, and the magnetization direction on the active surface is radial magnetization, and the magnetic pole formation is stable.

[0036] See also Figure 3Preferably, the sealing assembly described in the utility model includes an O-ring 251 arranged between the sleeve 211 and the rotating shaft 21, a flat washer 252 is provided on the outside of the O-ring 251, and an open retaining ring 253 is provided on the outside of the flat washer 252. The utility model adopts a three-level sealing structure protection. The first protection structure is the O-ring protection to prevent dust from entering the rotating pair; the second protection structure is the diaphragm 241 above the magnet seat 23, which plays a waterproof role; the third is the epoxy resin glue filled in the PCB cavity to prevent dust and other impurities from damaging the circuit board 24. The three protection structures make the protection level of the angle sensor reach IP67.

[0037] See also Figure 3 Preferably, the circuit board 24 described in the utility model includes a signal processing circuit and circuit elements such as a Hall chip. The rotating shaft 21 is driven to rotate by the measured shaft 1, and the magnet seat 23 arranged around the rotating shaft 21 drives the bar magnet in this embodiment to rotate. The Hall chip and the circuit board 24 are stationary. Based on the principle of the Hall effect, the magnetic lines of force passing through the Hall chip rotate to generate a changing voltage on the Hall chip. The changing voltage value corresponds to the rotation angle of the measured shaft 1 one by one, and the changing voltage is output through the signal processing circuit. The above-mentioned use of the Hall chip and the magnet 231 and other components to measure the angle of the measured shaft 1 is a conventional technical means for those skilled in the art and will not be repeated here.

[0038] Preferably, the circuit board 24 described in the utility model is provided with pins, and the number of pins of the pins varies according to the number of signal pins to be connected. The pins are used to connect to external devices and to transmit signals generated in the circuit board 24.

[0039] See also Figures 5 to 8 A rotating shaft 21 is passed through the sensor 2, and the sensor 2 is connected to a fixed component. The fixed component includes a positioning plate 7 coaxially arranged with the rotating shaft 21, and a first U-shaped groove 71 is provided in the positioning plate 7. The sensor 2 is provided on one side of the positioning plate 7, and a sensor 2 bracket is provided on the other side of the positioning plate 7. A second U-shaped groove 51 is opened on the sensor 2 bracket, and one side of the sensor 2 input rotating shaft 21 abuts against the first U-shaped groove 71. The rotating shaft 21 is passed through the first U-shaped groove 71 and the second U-shaped groove 51. The center of the positioning plate 7 and the sensor 2 are located on the same axis; the axis of the rotating shaft 21 and the center of the positioning plate 7 are located on the same axis, thereby realizing the positioning of the sensor 2 with the help of the positioning plate 7.

[0040] Specifically, a limiting space is provided between the positioning plate 7 and the sensor 2, and the limiting space is an arc groove 22 symmetrically arranged on the sensor 2. When it is necessary to perform operations such as zeroing the sensor 2, the sensor 2 is rotated along the limiting space (arc groove 22) with the axis as the center of the circle to adjust the relative angle between the sensor 2 and the positioning plate 7.

[0041] The sensor 2 bracket is a bent plate, and the bending angle of the sensor 2 bracket is 90°. One end of the sensor 2 bracket is bolted to the positioning plate 7, and the other end of the sensor 2 bracket is bolted to the main bracket 0, so that the sensor 2 bracket is easy to install and disassemble.

[0042] The sensor 2 includes a sensor 2 housing, a rotating shaft 21 is passed through the sensor 2 housing, a sealing assembly is provided on the rotating shaft 21, a shaft to be measured 1 is coaxially provided at the end of the rotating shaft 21, and the shaft to be measured 1 is a swing arm shaft in this embodiment and is installed on the main bracket 0, and the sensor 2 is connected to the main bracket 0 via the sensor 2 bracket.

[0043] An elastic member (including a rotating member 11, a matching member 12, an active space 13 and other structural coordination) is provided between the rotating shaft 21 and the measured shaft 1 to buffer the offset of the sensor 2 and the measured shaft 1 being out of axial alignment.

[0044] The end of the shaft 1 to be tested is eccentrically provided with a rotating member 11. Specifically in this example, the rotating member 11 is a shift shaft (a cylindrical shaft-type component). Preferably, the end of the shaft 1 to be tested is coaxially fixed with a shaft end baffle 3.

[0045] A first positioning hole 10 is provided at the end of the shaft 1 to be tested, and a second positioning hole 31 is provided at the center of the shaft end baffle 3. Positioning members 6 are installed in the first positioning hole 10 and the second positioning hole 31. The positioning member 6 adopts a pin structure. The axial center positioning of the shaft 1 to be tested and the shaft end baffle 3 is achieved through the cooperation of the positioning member 6 with the first positioning hole 10 and the second positioning hole 31.

[0046] The position of installing the sensor 2 bracket is that the second U-shaped groove 51 of the sensor 2 bracket is facing the shaft 1 to be measured, and the sensor 2 bracket is fixed to the positioning plate 7 by bolts. After the positioning member 6 is installed, one end of it is clearance fit or transition fit with the shaft end baffle 3. At this time, the shaft end baffle 3 is in a rotatable state, and one end is installed on the sensor 2 bracket. The relative position of the sensor 2 bracket and the positioning member 6 is adjusted, and the positioning member 6 is passed through the second U-shaped groove 51 so that the positioning member 6 just rests against the first U-shaped groove 71 of the positioning plate 7. The shaft end baffle 3 is eccentrically provided with a counterweight to rotate the shaft end baffle 3. The center of gravity of the shaft end baffle 3 is close to one side of the rotating member 11 when the shaft end baffle 3 is in a rotatable state. The shaft end baffle 3 rotates at an angle, and the rotating member 11 is located at the lowest end of the shaft end baffle 3. After the shaft end baffle 3 is positioned, the shaft end baffle 3 is fixedly installed with the end of the shaft 1 to be measured through a fixed structure, and finally the positioning member 6 is removed.

[0047] The output end of the sensor 2 is provided with a matching piece 12, which is a shift plate that forms a predetermined angle with the axis of the output end of the sensor 2. The matching piece 12 is provided with an activity space 13 for the output end of the sensor 2 to move radially, and the rotating piece 11 extends into the activity space 13. Through the above structure, the connection between the sensor 2 and the shaft to be measured 1 is replaced from the traditional "rigid connection" to a "flexible connection", and even if there is a certain angle mismatch or the axis is not centered, the activity space 13 between the groove of the shift plate and the pin of the shift shaft allows a certain amount of offset.

[0048] The utility model provides an angle sensor, including a shaft to be measured and a sensor located at one side end thereof, wherein a rotating part is eccentrically arranged at the end of the shaft to be measured, and the rotating part is a dial shaft, and a shaft end baffle is coaxially fixedly connected to the end of the shaft to be measured, and a first positioning hole at the end of the shaft to be measured and a second positioning hole and a positioning part are arranged at the center of the shaft end baffle, so as to coaxially position the shaft end baffle and the shaft to be measured; a counterweight part eccentrically arranged on the shaft end baffle drives the shaft end baffle to rotate, and after adjusting its center of gravity, the counterweight part is used to adjust the center of gravity of the shaft end baffle to achieve vertical positioning, and the sensor and the positioning plate are connected in this positioning state; the positioning plate is used to assist the angle sensor in center positioning, and the angle sensor is supported and fixed by the sensor bracket, so as to have strong stability; the positioning plate is positioned by the positioning mechanism and the shaft to be measured, and the angle sensor is coaxially centered with the shaft to be measured by the positioning plate, so as to reduce the difficulty of aligning the angle sensor during installation and improve the measurement accuracy of the angle sensor.

[0049] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. An angle sensor, characterized in that It includes a sensor, a rotating shaft is passed through the sensor, and the sensor is connected to a fixed component; The fixing assembly comprises a positioning plate coaxially arranged with the rotating shaft, and an elastic member is arranged between the rotating shaft and the axis to be measured to buffer the offset of the sensor and the axis to be measured; One end of the mounting positioning piece is connected to the axis of the positioning plate, and the other end is connected to the center of the axis to be measured, so as to adjust the sensor to be coaxial with the axis to be measured.

2. The angle sensor according to claim 1, characterized in that: A sealing assembly is arranged on the rotating shaft, and the sealing assembly comprises an O-ring arranged between the shaft sleeve and the rotating shaft, a flat washer is arranged on the outer side of the O-ring, and an open retaining ring is arranged on the outer side of the flat washer.

3. The angle sensor according to claim 1, characterized in that: A shaft sleeve is arranged between the rotating shaft and the sensor, one end of the rotating shaft is connected to the shaft to be measured, and the other end of the rotating shaft is ringed with the magnet seat.

4. The angle sensor according to claim 3, characterized in that: A cavity is arranged in the magnet seat, and a magnet is arranged in the cavity.

5. The angle sensor according to claim 4, characterized in that: A circuit board is arranged on one side of the magnet seat away from the rotating shaft, and pins are arranged on the circuit board.

6. The angle sensor according to claim 5, characterized in that: A diaphragm is arranged between the circuit board and the magnet seat, and an upper cover is arranged between the circuit board and the sensor housing.

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