CN212514639U - Speed sensor capable of simultaneously outputting two independent frequency pulses - Google Patents

Abstract

The speed sensor capable of simultaneously outputting two independent frequency pulses comprises two sensors, an upper cover, a fixed seat and a moving shaft which penetrates through the middle of the fixed seat and can rotate relative to the fixed seat, wherein the two sensors respectively comprise a moving part and a sensing part and are all arranged in a space enclosed by the upper cover and the fixed seat, the two moving parts are arranged on the moving shaft in parallel and rotate along with the moving shaft, and two sets of sensing parts are fixed on the fixed seat and are respectively close to the corresponding moving parts. The two moving parts are driven to rotate simultaneously by the rotation of the same moving shaft, the two sets of sensing parts simultaneously output pulse signals with independent frequencies, and pulses with two different frequencies can be selectively output so as to meet the requirements of different systems on pulses with different frequencies.

Description

Speed sensor capable of simultaneously outputting two independent frequency pulses

Technical Field

The utility model relates to a speedtransmitter, concretely relates to speedtransmitter that can export two kinds of independent frequency pulses simultaneously.

Background

In the running process of the train, a speed sensor is needed to measure the speed in real time and send pulses to a control system so as to monitor the train condition in real time. At present, a mode of installing a sensor at an axle box end cover is generally adopted, a photoelectric sensor is almost adopted for measuring the speed in the early stage, a structure of adopting a Hall sensor is also adopted in the later stage, and a grating disc or a speed measuring gear is driven to rotate by the rotation of an axle to output a 200-pulse/rotation signal. For example, application number CN201821835563.2, the utility model entitled "a locomotive speed sensor" adopts a hall sensor as speed sensor, fixes a gear on the main shaft, sets up inductive probe in the circumference outside of gear, outputs the pulse signal of a frequency. For example, the invention patent of application No. cn201711182134.x entitled "wheel speed sensor, detection device and axle state detection method" also adopts a hall sensor as a speed sensor, and the sensing probe is also arranged at the circumferential outer side of the gear and only outputs a pulse signal with one frequency.

With the use of the new-generation LKJ system, which requires 72 pulses/revolution of signal, and the other systems still require 200 pulses/revolution of signal, the conventional speed sensor only outputs a pulse signal with one frequency, which cannot meet the requirements of use. And because spare part on the train is various, compact structure, can't install independent sensor in addition under the condition of not changing current structure.

Therefore, there is a need for a special method and structure to output pulses of two different frequencies to meet the current requirements without changing the current vehicle structure.

SUMMERY OF THE UTILITY MODEL

The utility model discloses can only export the pulse signal of a frequency and can not satisfy operation requirement's problem to current speedtransmitter, provide one kind can export the speedtransmitter of two kinds of independent frequency pulses simultaneously, provide the pulse of two kinds of different frequencies for different systems simultaneously.

The utility model discloses a solve the technical means that above-mentioned problem adopted and do: the utility model provides a velocity sensor of two kinds of independent frequency pulse of simultaneous output, includes two sensors, upper cover, fixing base and passes and can relative fixing base pivoted motion axle in the middle of following the fixing base, and two sensors include moving part and response part respectively, all set up in the space that upper cover and fixing base enclose, and two moving part parallel arrangement are on the motion axle and rotate along with the motion axle, and two sets of response parts are fixed on the fixing base, are close to its corresponding moving part respectively.

Further, one of the sensors is a hall sensor, and includes a gear and a sensing part thereof, and the sensing part is disposed at one side surface of the gear.

Further, the teeth of the gear are arranged on the side face close to the inductive component.

Furthermore, a fixed plate is fixedly arranged in the fixed seat, and the sensing part of one sensor is fixedly arranged on the axial side face of the fixed plate.

Further, the sensing part comprises a probe and a circuit board, and the probe and the circuit board are separately arranged on the fixing plate.

Furthermore, a first fixing hole is formed in the surface, facing the moving part, of the fixing plate, and the probe is fixed in the first fixing hole.

Furthermore, the whole fixed plate is in a ring shape with a notch, and the sensing component of the other sensor is fixedly arranged at the notch of the fixed plate.

Furthermore, one side of the fixing seat is a plane and is connected with the axle box end cover of the train through the plane.

Further, the fixing base is provided with a concave hole on the surface away from the plane, and the fixing plate and the two sensors are arranged on the side of the concave hole of the fixing base.

Furthermore, the speed sensor also comprises a cable sleeve, a connector is arranged on the circumferential outer wall of the fixed seat, and the cable sleeve and the connector are fixedly connected into a whole.

The utility model has the advantages that:

1. the utility model discloses a with two integrated settings of sensor in same space, utilize same root motion axle to drive two kinds of independent frequency's of sensor output pulse simultaneously, can select the pulse of exporting two kinds of different frequencies to satisfy the demand of different systems to different frequency pulse.

2. The utility model discloses an establish the tooth on single side of gear to the part setting of will responding to is located this side, and the limited position of rational utilization has reduced the space that whole hall sensor upwards occupied in week greatly, sets up whole sensor compacter.

3. The utility model discloses a set the whole fixed plate to have the open-ended cyclic annular, set up the response part of a sensor on a surface, make it be close to its moving part that corresponds as far as possible, and set up the response part of another sensor at the opening part, make this response part have sufficient installation space, further improved the compactedness of whole sensor.

4. The utility model discloses a sensor just all installs moving part and response part completely fixed before the closing cap, will respond to the distance between part and the moving part fixed well under the environment open completely, guarantees that response part can receive the sensing signal, has both simplified the installation, has improved the sensitivity of sensor response again, guarantees output signal's correctness.

Drawings

FIG. 1 is a schematic external structural view according to an embodiment;

FIG. 2 is a schematic view of the structure of FIG. 1 with the upper cover removed;

FIG. 3 is a schematic diagram of an internal structure of the embodiment;

FIG. 4 is a schematic structural diagram of the first embodiment with the Hall sensor removed;

FIG. 5 is a schematic view of a Hall sensor mounting structure according to an embodiment;

FIG. 6 is a schematic view of a gear structure according to an embodiment;

FIG. 7 is a schematic diagram of a fixing plate structure according to an embodiment;

FIG. 8 is a schematic view of a fixing base according to an embodiment;

FIG. 9 is a schematic diagram of a circuit board of a Hall sensor according to an embodiment;

FIG. 10 is a schematic view of an assembly structure between a fixed seat and a movable shaft according to an embodiment;

in the figure: 1. the photoelectric module comprises a fixed seat, 11 connecting bodies, 12 bosses, 13 fixing plates, 131 fixing holes I, 132 fixing holes II, 133 protrusions, 2 upper covers, 3 cable sleeves, 4 square tenons, 41 universal shafts, 5 moving shafts, 51 fixing nuts, 6 gears, 61 probes, 62 circuit boards, 7 grating discs, 71 photoelectric module boxes and 8 bearings.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Example one

The embodiment is a speed sensor capable of simultaneously outputting two independent frequency pulses for a train, and comprises a photoelectric sensor and a hall sensor, as shown in fig. 1, the two sensors are packaged in a narrow space surrounded by a fixed seat 1 and an upper cover 2, and a tennons 4 is arranged on the axial outer side of the fixed seat 1, is connected to the inside of an axle box of the train, and moves along with the movement of a train wheel pair. The peripheral side of fixing base 1 is equipped with cable cover 3, and the signal that the sensor produced is transmitted to the corresponding system of train through the cable that sets up in cable cover 3. The arrangement of the cables in this embodiment is not shown in the drawings, and the arrangement may be performed in an existing manner.

As shown in fig. 2, the fixing base 1 is an annular body with a through hole in the middle, one side of the annular body is a plane and is fixedly connected with the axle box end cover through the plane, a concave hole is arranged in the other side of the annular body, the moving shaft 5 passes through the through hole and extends out of the concave hole, and a fixing plate 13 surrounding the moving shaft 5 is fixedly arranged in the concave hole of the fixing base 1.

As shown in fig. 7, the fixing plate 13 is a non-closed annular structure with a gap in the annular direction, the moving shaft 5 passes through the annular center of the fixing plate 13, the fixing seat 1 and the fixing plate 13 are both stationary relative to the axle box end cover, as shown in fig. 10, the fixing seat 1 and the moving shaft 5 are engaged with each other through a bearing 8, wherein the bearing 8 may be an existing structure, and the assembly of the fixing seat 1 and the moving shaft 5 on the bearing 8 is performed according to the existing installation method. In this embodiment, the photoelectric sensor outputs two paths of signals, only one photoelectric module box 71 is arranged at the notch of the fixing plate 13, and the circuit board and the photointerrupter are all integrated therein because the installation space of the photoelectric module box 71 is large in this embodiment. The Hall sensor outputs six signals, three sets of sensing parts are arranged, and because the sensing parts are large in number and occupy too much space if integrated together, the sensing parts are split into the corresponding probes 61 and the corresponding circuit boards 62 which are separately arranged on the fixing plate 13 to save space. As shown in fig. 7, three fixing holes one 131 are provided on one side surface of the fixing plate 13. As shown in fig. 3, the three probes 61 are respectively fixed in the three first fixing holes 131 of the fixing plate 13, in addition, a second fixing hole 132 communicated to the first fixing hole 131 is arranged on the circumferential surface of the fixing plate 13, and after a bolt or other fixing rod passes through the second fixing hole 132, the probes 61 are fixed on the fixing plate 13 to avoid relative movement, thereby ensuring the accuracy of sensing. As shown in fig. 9, in this embodiment, the plurality of circuit boards 3 are respectively disposed on the upper and lower surfaces of the fixing plate, so that the space is reasonably utilized to integrate all the devices therein. When the same pulse number is output, the diameter of the grating disk 7 of the photoelectric sensor is far smaller than that of the gear 6 of the Hall sensor. In this embodiment, in order to install the hall sensor and the photosensor in the narrow space of the shaft end and ensure that the hall sensor and the photosensor can both output the pulse signal meeting the requirement, as shown in fig. 4, the grating disk 7 is fixedly disposed on the moving shaft 5 at the position close to the fixing plate 13, the photosensitive probe 71 protrudes from the notch of the fixing plate 13 to be close to the grating disk 7 above the fixing plate 13, and receives the sensing along with the rotation of the grating disk 7 to output the pulse. As shown in fig. 5, the gear 6 is disposed at an end of the moving shaft 5 away from the fixed plate 13, and a fixing nut 51 is provided at an end of the moving shaft 5 to prevent the gear 6 from falling out. The probe 61 is fixed at one side surface of the gear 6 in the radial direction by the fixing plate 13, and at the same time, the fixing plate 13 also plays a role of lifting the probe 61 so that the probe 61 is as close as possible to the gear 6 to receive sensing. As shown in fig. 6, in order to ensure the strength of the gear 6 and ensure that the probe 61 can absolutely receive the sensing, teeth are provided on the side surface of the gear 6 close to the probe 61, a concave portion is milled at a position of the gear 6 close to the central hole for convenience of machining, and teeth are machined around the concave portion, that is, teeth are machined in a circumferential direction only at a portion of one side surface of the gear 6 close to the outer periphery. As shown in fig. 3, the grating disk 7, the optoelectronic module box 71, the probe 61 and the circuit board 62 are located on one side of the gear 6 as a whole, and the parts of the two sensors are reasonably integrated, so that the diameter of the gear 6 can be as large as possible, the number of teeth on the gear 6 can be as large as possible, and the hall sensor can output signals with a large number of pulses as possible.

As shown in fig. 8, a rectangular connector 11 is disposed on the circumferential outer periphery of the fixing base 1, and is connected to the cable sheath 3 through the connector 11, and a through hole extending into the recessed hole of the fixing base 1 is formed in the connector 11, so that a cable connected to the sensor is connected to the outside, and a generated pulse signal is transmitted to the monitoring system.

In order to prevent the circuit board 62 from being worn out during the installation of the fixing plate 13 after being installed on the fixing plate 13, as shown in fig. 8, three bosses 12 are provided inside the fixing base 1, and correspondingly, three protrusions 133 are provided on the periphery of the fixing plate 13, and after the fixing plate 13 is positioned on the fixing base 1 by the cooperation of the protrusions 133 and the bosses 12, the lower part of the fixing plate 13 is hollow, so that the circuit board 62 is not pressed.

The above embodiment uses a combination of a hall sensor and a photosensor, which is a preferred combination mode from the structural point of view. Of course, the combination of sensors can also adopt other modes, such as two photoelectric sensors or two Hall sensors. Moreover, the assembly of each device is not limited to the structure, for example, the circuits of a plurality of Hall sensors can be integrated in a larger circuit board, so that the arrangement of cables is convenient; the gear may also be designed in the shape of a conventional gear or the like, in case the strength can be ensured.

The above embodiments are provided only for the purpose of illustration, not for the limitation of the present invention, and those skilled in the relevant art can make various changes or modifications without departing from the spirit and scope of the present invention, so all equivalent technical solutions should also belong to the protection scope of the present invention, and the protection scope of the present invention should be defined by the claims.

Claims (10)

1. The utility model provides a velocity sensor of two kinds of independent frequency pulse of simultaneous output, includes two sensors, upper cover, fixing base and passes and can relative fixing base pivoted movement axis, its characterized in that from the fixing base in the middle of: the two sensors respectively comprise a moving part and an induction part which are arranged in a space defined by the upper cover and the fixed seat, the two moving parts are arranged on the moving shaft in parallel and rotate along with the moving shaft, and the two sets of induction parts are fixed on the fixed seat and respectively close to the corresponding moving parts.

2. A speed sensor that simultaneously outputs pulses of two independent frequencies, as claimed in claim 1, wherein: one of the sensors is a Hall sensor and comprises a gear and an induction component thereof, and the induction component is arranged on one side surface of the gear.

3. A speed sensor that simultaneously outputs pulses of two independent frequencies, as claimed in claim 2, wherein: the teeth of the gear are arranged on the side face close to the inductive component.

4. A speed sensor that simultaneously outputs pulses of two independent frequencies, as claimed in claim 1, wherein: the fixed plate is also fixedly arranged in the fixed seat, and the induction part of one sensor is fixedly arranged on the axial side face of the fixed plate.

5. A speed sensor that outputs pulses of two independent frequencies simultaneously, as claimed in claim 4, wherein: the sensing part comprises a probe and a circuit board, and the probe and the circuit board are separately arranged on the fixing plate.

6. A speed sensor that simultaneously outputs pulses of two independent frequencies, as claimed in claim 5, wherein: the surface of the fixed plate facing the moving part is provided with a first fixed hole, and the probe is fixed in the first fixed hole.

7. A speed sensor that outputs pulses of two independent frequencies simultaneously, as claimed in claim 4, wherein: the whole fixed plate is in a ring shape with a notch, and the sensing part of the other sensor is fixedly arranged at the notch of the fixed plate.

8. A speed sensor that outputs pulses of two independent frequencies simultaneously, as claimed in claim 4, wherein: one side of the fixing seat is a plane and is connected with the axle box end cover of the train into a whole through the plane.

9. A speed sensor that simultaneously outputs pulses of two independent frequencies, as claimed in claim 8, wherein: be equipped with the shrinkage pool on the planar face is kept away from to the fixing base, and fixed plate and two sensors all set up the shrinkage pool side at the fixing base.

10. A speed sensor that simultaneously outputs pulses of two independent frequencies, as claimed in claim 8, wherein: the speed sensor further comprises a cable sleeve, a connector is arranged on the outer wall of the fixed seat along the annular direction, and the cable sleeve and the connector are fixedly connected into a whole.

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