CN218955727U

CN218955727U - Novel stay cord displacement sensor

Info

Publication number: CN218955727U
Application number: CN202223197157.7U
Authority: CN
Inventors: 代国良; 马文成; 刘健飞
Original assignee: Tofe Sensing Technology Shanghai Co ltd
Current assignee: Tofe Sensing Technology Shanghai Co ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-05-02
Anticipated expiration: 2032-11-29

Abstract

The utility model discloses a novel stay cord displacement sensor, which comprises a steel wire rope, a wire hub and a central shaft, wherein the steel wire rope is wound on the wire hub; the central shaft is positioned at the center of the hub, and the hub drives the central shaft to rotate when rotating; an encoder is arranged below the central shaft, and the central shaft rotates to drive the shaft of the encoder to rotate; the encoders are arranged in two, and are arranged diagonally. The encoder is used for replacing a potentiometer commonly used in the market, so that the defects that the potentiometer stay cord displacement sensor is easily subjected to temperature change, abrasion and resistance change caused by dirt between the slider and the variable resistor to influence the precision are avoided, and the measurement precision is improved; and by adopting a redundant structure of double encoders, the reliability of the measured data is improved by measuring two groups of data.

Description

Novel stay cord displacement sensor

Technical Field

The utility model relates to the field of encoders, in particular to a novel stay cord displacement sensor.

Background

The stay cord displacement sensor is a compact structure of the linear displacement sensor, fully combines the advantages of the angle sensor and the linear displacement sensor, and becomes a sensor with small installation size, compact structure, large measurement stroke and high precision, and the stroke is different from hundreds of millimeters to tens of meters. The function of the pull-cord displacement sensor is to convert mechanical motion into an electrical signal that can be measured, recorded or transmitted.

The current pull rope displacement sensor is mostly a potentiometer pull rope displacement sensor and comprises a sliding contact on a resistor film, the position of the contact is changed by external action, so that the ratio of upper and lower resistors of the resistor film is changed, the voltage of an output end is changed along with the external position, the purpose of measuring displacement is achieved, but abrasion can be caused when a brush moves and the resistor is kept in contact, meanwhile, the resistor can be influenced by the ambient temperature, the resistance can be changed under the vibration environment, and the precision of the potentiometer is influenced.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a novel stay cord displacement sensor, which comprises a steel wire rope, a wire hub and a central shaft, wherein the steel wire rope is wound on the wire hub; the central shaft is positioned at the center of the hub, and the hub drives the central shaft to rotate when rotating; an encoder is arranged below the central shaft, and the central shaft rotates to drive the shaft of the encoder to rotate; the two encoders are arranged diagonally.

Preferably: an encoder bracket is arranged between the encoder and the central shaft.

Preferably: the encoder bracket is internally provided with a tooth group.

Preferably: one end of the steel wire rope is fixedly connected with the wire hub, the other end of the steel wire rope is fixedly connected with the wire pulling head, an arc guide wheel assembly is arranged between the wire hub and the wire pulling head, the steel wire rope is orderly arranged through the arc guide wheel assembly, and a buffer block is arranged on the contact surface of the wire pulling head and the steel wire rope.

Preferably: the wire hub is fixedly provided with a spiral spring which is fixedly sleeved on the central shaft, and the wire rope pulled out is recovered through the spiral spring.

Preferably: the periphery of the scroll spring is provided with a coil spring bracket.

Preferably: one end of the central shaft is provided with a central shaft sleeve, and an upper cover is arranged above the shaft sleeve.

Preferably: the hub is connected to the support through the central shaft.

Preferably: the encoder is externally provided with a lower cover.

Preferably: and an outlet connector is arranged at the bottom of the lower cover.

The utility model has the technical effects and advantages that:

the encoder is used for replacing a potentiometer commonly used in the market, so that the defects that the potentiometer stay cord displacement sensor is easily subjected to temperature change, abrasion and resistance change caused by dirt between the slider and the variable resistor to influence the precision are avoided, and the measurement precision is improved; and by adopting a redundant structure of double encoders, the reliability of the measured data is improved by measuring multiple groups of data.

Drawings

FIG. 1 is a partial block diagram of a novel pull rope displacement sensor provided in an embodiment of the present application;

FIG. 2 is another part of a structural diagram of a novel pull rope displacement sensor provided in an embodiment of the present application;

FIG. 3 is a top view of a novel pull-cord displacement sensor provided in an embodiment of the present application;

FIG. 4 is a side view of a novel pull-cord displacement sensor provided in an embodiment of the present application;

fig. 5 is a bottom view of a novel pull-cord displacement sensor provided in an embodiment of the present application.

In the figure:

1. an upper cover; 2. a coil spring bracket; 3. a volute coil spring; 4. a central shaft sleeve; 5. a central shaft; 6. a fixed bracket; 7. a hub; 8. a wire rope; 9. an arc guide assembly; 10. a wire drawing head; 11. a buffer block; 12. a wire outlet connector; 13. an encoder support; 14. an encoder; 15. and a lower cover.

Detailed Description

The utility model will be described in further detail with reference to the drawings and the detailed description. The embodiments of the utility model have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the utility model in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, and to enable others of ordinary skill in the art to understand the utility model for various embodiments with various modifications as are suited to the particular use contemplated.

Referring to fig. 1-2, in this embodiment, a novel pull rope displacement sensor is provided, which includes a steel wire rope 8, a hub 7 and a central shaft 5, one end of the steel wire rope 8 is fixedly connected with a pull head 10, the pull head 10 is attached to a measured moving object, and the movement axis of the measured moving object is aligned with the linear movement of the steel wire rope 8. When the movement occurs, the steel wire rope 8 has the action process of being pulled out and recovered, and the contact surface of the stay wire head 10 and the steel wire rope 8 is provided with a buffer block, so that the damage to the steel wire rope 8 caused by repeated pulling out and recovery is prevented.

The other end of the wire rope 8 is fixedly connected with the wire hub 7, and is wound on the wire hub 7 at the same time, a central shaft 5 is arranged at the central position of the wire hub 7, the wire rope 8 is pulled to drive the wire hub 7 to rotate under the force of rotation so as to drive the central shaft 5 to rotate, a vortex coil spring 3 is fixedly arranged on the wire hub 7, and the vortex coil spring 3 is a spring with one end fixed and the other end provided with torque; under the action of external force, the spring material is bent and elastically deformed, after the external force is eliminated, the spiral spring can be restored to the original state, and a plurality of tools and devices are restored by the spiral spring, in the embodiment, the spiral spring 3 ensures that the tension of the steel wire rope 8 is unchanged, and after the external force is eliminated, the steel wire rope 8 is retracted to the hub 7; the periphery of the volute coil spring 3 is provided with a coil spring bracket 2 for supporting and protecting the volute coil spring 3.

An arc guide wheel assembly 9 is further arranged between the wire hub 7 and the wire pulling head 10, the steel wire ropes 8 are stuck to the rollers of the arc guide wheel assembly 9 in the pulling and recovering processes, the wire hubs 7 are tidily arranged during recovering, and no multilayer winding is performed on the wire hubs 7.

One end of the central shaft 5 is provided with a central shaft sleeve 4 which is sleeved on the central shaft 5 to play a role in protection; an upper cover 1 is fixedly connected above the central shaft sleeve 4, and the upper cover 1 is matched and covered on the coil spring bracket 2; the hub 7 is connected to the stationary support 6 via the other end of the central shaft 5, the stationary support 6 being mounted in engagement under the coil spring support 2.

The lower cover 15 is installed to fixed bolster 6 below, and the lower cover 15 is inside to be provided with encoder support 13, and encoder support 13 top is center pin 5, and the below is provided with encoder 14, still installs tooth group in the encoder support 13 simultaneously, and center pin 5 rotates and drives tooth group rotation, and the pivot and the tooth group cooperation rotation of encoder 14 output one with wire rope 8 travel distance proportional electrical signal, and the measurement output signal can obtain the displacement of measured motion object.

An encoder 14, the encoder 14 being a device that compiles, converts, or communicates, transmits, and stores signals or data into a signal form; in this embodiment, the encoder 14 converts the linear displacement into an electrical signal, and the encoder 14 may be an incremental encoder or an absolute encoder, where the incremental encoder converts the displacement into a periodic electrical signal, and converts the electrical signal into a count pulse, and the number of pulses indicates the magnitude of the displacement, and each position of the absolute encoder corresponds to a determined digital code, so that its indication is only related to the start and end positions of the measurement, and is not related to the middle of the measurement.

The encoders 14 are provided in two, diagonally placed in the lower cover 15, and the tooth group includes two gears; two outgoing connectors 12 are installed on the side edge of the lower cover 15 and are output interfaces of the encoders 14, two encoders 14 are arranged to measure two groups of data, redundancy and protection are achieved, the data measured by one encoder 14 serve as main data and are directly output to external data recording equipment to serve as closed loop control, the other encoder 14 performs multiple ratios on the detected displacement data and the main data, and an alarm is generated by setting the maximum phase difference value and exceeding the maximum phase difference value.

Referring to fig. 3-5, the upper cover 1 is fixedly connected with the coil spring support 2 through a plurality of screws, the coil spring support 2 is fixedly connected with the fixing support 6 through a plurality of screws, and the fixing support 6 is connected with the lower cover 15 through a plurality of screws.

It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art and which are included in the embodiments of the present utility model without the inventive step, are intended to be within the scope of the present utility model. Structures, devices and methods of operation not specifically described and illustrated herein, unless otherwise indicated and limited, are implemented according to conventional means in the art.

Claims

1. A novel stay cord displacement sensor, which comprises a steel wire rope (8), a wire hub (7) and a central shaft (5), and is characterized in that the steel wire rope (8) is wound on the wire hub (7);

the central shaft (5) is positioned at the center of the hub (7), and the hub (7) drives the central shaft (5) to rotate when rotating;

an encoder (14) is arranged below the central shaft (5), and the central shaft (5) rotates to drive the shaft of the encoder (14) to rotate;

the number of the encoders (14) is two, and the encoders are arranged diagonally.

2. A novel pull string displacement sensor according to claim 1, characterized in that an encoder bracket (13) is arranged between the encoder (14) and the central shaft (5).

3. A new pull-cord displacement sensor according to claim 2, characterized in that the encoder support (13) is internally provided with a set of teeth.

4. The novel stay cord displacement sensor according to claim 1, wherein one end of the steel wire rope (8) is fixedly connected with the wire hub (7), the other end of the steel wire rope is fixedly connected with the wire head (10), an arc guide wheel assembly (9) is arranged between the wire hub (7) and the wire head (10), the steel wire rope (8) is orderly arranged through the arc guide wheel assembly (9), and a buffer block (11) is arranged on the contact surface of the wire head (10) and the steel wire rope (8).

5. The novel stay cord displacement sensor according to claim 1, wherein a spiral spring (3) is fixedly mounted on the hub (7), the spiral spring (3) is fixedly sleeved on the central shaft (5), and the pulled-out steel wire rope (8) is recovered through the spiral spring (3).

6. The novel stay cord displacement sensor according to claim 5, wherein a coil spring bracket (2) is arranged on the periphery of the scroll spring (3).

7. The novel stay cord displacement sensor according to claim 1, wherein one end of the central shaft (5) is provided with a central shaft sleeve (4), and an upper cover (1) is arranged above the central shaft sleeve (4).

8. A new pull cord displacement sensor according to claim 1, wherein the hub (7) is connected to a stationary support (6) via the central shaft (5).

9. A novel pull-cord displacement sensor according to claim 1, characterized in that the encoder (14) is externally provided with a lower cover (15).

10. The novel stay cord displacement sensor according to claim 9, wherein an outlet connector (12) is installed at the bottom of the lower cover (15).