1. A damping coupling having a plurality of damping plates and an output shaft, wherein:

the partial length of output shaft with the hole formation tight fit of a plurality of damping fins is connected, can rely on frictional force to provide the damping effect when output shaft and damping fin form relative rotation.

2. The damping coupling of claim 1, further comprising a body, said plurality of damping plates being fixedly connected to said body so as to be relatively non-rotatable.

3. The damping coupling according to claim 2, characterized in that a mounting space is formed in the main body, and the outer edge of the damping fin is provided with two positioning portions arranged oppositely, and the two positioning portions are abutted by the inner wall of the mounting space and cannot rotate in both directions.

4. The damping coupling of claim 3, wherein the locating portion is a locating snap.

5. The damping coupling according to claim 3, wherein the damping plate has a positioning hole, and the main body has a positioning pin disposed corresponding to the positioning hole for preventing the damping plate from rotating relatively.

6. The damping coupling according to claim 3, wherein one snap groove is provided in the mounting space of the body for each damping fin.

7. The damping coupling according to claim 3, wherein the inner hole of the damping fin is an open hole of a circular arc having a central angle exceeding 120 degrees.

8. A sampling needle lifting structure is characterized in that a slide block is mounted on a linear guide rail, the slide block is driven by a screw rod through threads to linearly displace, and a sampling needle capable of moving up and down is arranged on the slide block; the method is characterized in that:

the damping coupling is provided according to any one of claims 1 to 7, a rotating shaft of a lifting motor is synchronously and rotatably connected with a body of the damping coupling, and an output shaft of the damping coupling is in power connection with the screw rod.

9. A manual valve characterized by:

a damping coupling according to any one of claims 1 to 7, wherein the shaft of the rotating electrical machine is connected to the body of the damping coupling in a synchronously rotatable manner, and the output shaft of the damping coupling is in a power connection with the valve stem of the manual valve.

Background

With the rapid development and application of the global industrialization process, automation and intellectualization are rapidly developed and popularized. Automation and intellectualization supplement each other, but in the application process of automation, a sensor is often required to be added for auxiliary control, but the problems of high price, extra installation space, measurement circuit and control program assistance are caused, and a plurality of limiting factors are caused for an automatic solution.

In the automatic application process, the electric actuating mechanism usually uses a motor as a power element, the actuating force of the motor needs to be detected and restricted in certain application scenes to achieve the purposes of collision detection, rated torque output and the like, usually, a torque sensor is added to assist other position sensors or a servo motor is adopted to achieve the purposes, and the application requirements of products with small-sized requirements and cost requirements on installation space cannot be met.

In view of the above disadvantages, a solution with simple structure, low cost and easy application is needed.

Disclosure of Invention

The invention aims to provide a damping coupler, a sampling needle lifting structure formed by the damping coupler and a manual valve, and solves the technical problems of complex torque control and high cost.

In order to achieve the purpose, the invention adopts the technical scheme that:

a damping coupling having a plurality of damping plates and an output shaft, wherein:

the partial length of output shaft with the hole formation tight fit of a plurality of damping fins is connected, can rely on frictional force to provide the damping effect when output shaft and damping fin form relative rotation.

The damping coupling comprises a main body, wherein the damping pieces are fixedly connected with the main body and cannot rotate relatively.

The damping coupler is characterized in that an installation space is formed in the main body, two positioning portions which are arranged in a back-to-back mode are arranged on the outer edge of the damping fin, and the two positioning portions are abutted by the inner wall of the installation space and cannot rotate in two directions.

The damping coupler, wherein, location portion is the location trip.

The damping coupler is characterized in that the damping sheet is provided with a positioning hole, and the main body is provided with a positioning pin which is arranged corresponding to the positioning hole and used for preventing the damping sheet from rotating relatively.

The damping coupler is characterized in that a clamping groove is formed in the mounting space of the main body corresponding to each damping fin.

The damping coupler is characterized in that the inner hole of the damping sheet is a circular arc-shaped open hole with a central angle exceeding 120 degrees.

A sampling needle lifting structure is characterized in that a slide block is mounted on a linear guide rail, the slide block is driven by a screw rod through threads to linearly displace, and a sampling needle capable of moving up and down is arranged on the slide block; the method is characterized in that:

the rotating shaft of the lifting motor is connected with the body of the damping coupler in a synchronous rotating mode, and the output shaft of the damping coupler is connected to the screw rod in a power mode.

A manual valve characterized by:

the rotating shaft of the rotating motor is synchronously and rotatably connected with the body of the damping coupling, and the output shaft of the damping coupling is in power connection with the valve rod of the manual valve.

The damping coupling provided by the invention can form a determined damping torque between the main body and the output shaft, and the magnitude of the damping torque can be accurately adjusted by increasing or decreasing the number of the damping sheets, so that the damping coupling has the advantages of simplicity, reliability, low cost, small occupied space and the like.

Drawings

Fig. 1 is a perspective view of the damping coupling of the present invention.

Fig. 2 is a longitudinal sectional structural view of the damping coupling of the present invention.

Fig. 3 is a side view structural view of the damping coupling of the present invention.

FIG. 4 is a schematic plan view of the damper.

FIG. 5 is a schematic view of the lifting structure of the sampling needle of the present invention.

Fig. 6 is a schematic view of the structure of the manual valve of the present invention.

Description of reference numerals: 1 a main body; 2, damping fins; 21, positioning a clamping hook; 3 an output shaft; 100 damping couplings; 200 pairs of driving wheels; 201 a lifting motor; 202 an outer sleeve; 203 a main driving wheel; 204 a conveyor belt; 205 a screw mandrel; 206 linear guide rails; 207 a slide block; 208 a sampling needle; 209 an upper supporting seat; 210 lower support base; 301 a rotating electrical machine; 303 a manual valve; 304 an upper substrate; 305 lower substrate.

Detailed Description

As shown in fig. 1 to 3, the present invention provides a damping coupling, which has a main body 1, a plurality of damping fins 2 and an output shaft 3, wherein:

an installation space is formed in the main body 1 for fixing the plurality of damping fins 2;

the damping fin 2 is provided with an outer edge matched with the main body 1 and an inner hole matched with the output shaft 3, the preferable structure is shown in fig. 4, the inner hole is an arc-shaped open hole with a central angle exceeding 120 degrees, and the outer edge is provided with two positioning parts (preferably positioning clamping hooks 21) which are arranged in an opposite way; the damping pieces 2 are arranged in the installation space of the main body 1 in a stacking way, and the two positioning clamping hooks 21 of the damping pieces 2 are abutted by the inner wall of the installation space of the main body 1 and cannot rotate in both directions;

the partial length of the output shaft 3 is in tight fit with the inner holes of the plurality of damping fins 2, so that the damping effect can be provided by virtue of friction force when the output shaft 3 and the damping fins 2 rotate relatively; the remaining length of the output shaft 3 is available for use as a power take-off shaft.

In order to improve the installation stability of the damping fins 2 and the main body 1, a clamping groove can be arranged in the installation space of the main body 1 corresponding to each damping fin 2, so that the distance between the damping fins 1 is consistent.

Moreover, the structure of the positioning portion of the damping fin 2 is not limited to the flange structure, and may also be a positioning hole, and a positioning pin is disposed on the main body 1 corresponding to the positioning hole, so as to ensure that the damping fin 2 does not rotate relatively.

In addition, the inner hole of the damping sheet 2 and part of the surface of the main body 1 are preferably coaxially arranged, so that the expanded application range of the damping coupling can be enlarged.

In short, by means of the simple mechanical structure, a determined damping torque can be formed between the main body 1 and the output shaft 3, and the damping torque can be accurately adjusted by increasing or decreasing the number of the damping fins 2, so that the damping device has the advantages of simplicity, reliability, low cost, small occupied space and the like.

As shown in fig. 5, which is a schematic view of a sampling needle lifting structure formed by the damping coupling in the present invention, a linear guide 206 is fixed between an upper support seat 209 and a lower support seat 210, a slider 207 is installed on the linear guide 206, a lead screw 205 is installed between the upper support seat 209 and the lower support seat 210, the lead screw 205 is in threaded connection with the slider 207, and can drive the slider 207 to move on the linear guide 206, and then drive a sampling needle 208 on the slider 207 to move up and down;

in the conventional sampling needle lifting structure, the power device drives the screw rod 205 to rotate, so as to control the lifting of the sampling needle 208, and when the sampling needle 208 is lowered and meets great resistance, the power device cannot reduce the driving force in time, which often causes the breakage of the sampling needle 208;

in the invention, as shown in fig. 5, a rotating shaft of a lifting motor 201 is connected with a body of a damping coupling 100 through an outer sleeve 202 in a synchronous rotating manner, an output shaft of the damping coupling 100 drives a main driving wheel 203 to rotate, the main driving wheel 203 drives an auxiliary driving wheel 200 arranged on a screw rod 205 to rotate through a driving belt 204, so as to drive a sliding block 207 and a sampling needle 208 to lift synchronously; when the resistance encountered by the descending of the sampling needle 208 exceeds the limit, the output shaft of the damping coupling 100 and the damping sheet slide relatively, so that the sampling needle 208 can be prevented from being broken.

Compared with the prior sampling needle lifting structure, the invention has the following advantages:

(1) the invention solves the problems of high processing cost and large installation space of the original mode in a specific application occasion.

(2) The invention solves the problem that the original mode needs additional detection circuit and control program;

(3) the invention solves the problem of reaction lag caused by circuit detection and judgment in the original mode, and adopts rated friction force to form a fixed torque value, so that the reaction is quicker compared with the original mode after the set torque value is reached in the original mode, the structure is more reliable, and the implementation is simpler and more convenient.

As shown in fig. 6, which is a schematic structural view of the manual valve of the present invention configured by using the above-mentioned damping coupling, a rotating shaft of a rotating motor 301 mounted on a lower substrate 305 is connected to a body of the damping coupling 100 through an outer sleeve 202 in a synchronously rotatable manner, and an output shaft of the damping coupling 100 is connected to a valve rod of a manual valve 303 mounted on an upper substrate 304 in a power connection;

with the arrangement, when the rotating motor 301 drives the valve rod of the manual valve 303 to rotate in the forward direction or the reverse direction, once the limit opening and closing position of the valve rod is reached, the output shaft of the damping coupling 100 and the damping fin can slide relatively, and the valve rod is prevented from being damaged due to over-rotation.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.