CN214267617U - Pulling pressure sensor for car coupler and car coupler buffering device - Google Patents

Abstract

The utility model discloses a pressure sensor for a car coupler and a car coupler buffer device, which comprises a sensor shell and a protection component, wherein the sensor shell is provided with a plurality of strain gauges; one end of the sensor shell is connected with the coupler body, and the other end of the sensor shell is connected with the energy absorption device; the protection assembly is arranged on the outer peripheral surface of the sensor shell, corresponds to the strain gauge and is used for protecting the strain gauge. The technical problem that longitudinal pulling and pressing force data borne by a coupler buffer device cannot be obtained in the running process of a train in the prior art is solved.

Description

Pulling pressure sensor for car coupler and car coupler buffering device

Technical Field

The utility model belongs to the technical field of the vehicle is even hung, especially, relate to a draw pressure sensor and coupling buffer for coupling.

Background

The coupler buffer device is an important part of a rail train and plays roles in connection, transmission and buffering. The stress of the coupler buffer device is an important parameter of the state of the coupler buffer device of the switch, and if the stress of the coupler buffer device is too large, the coupler buffer device can cause the triggering of an unrecoverable energy absorption device (which needs to be replaced after triggering), the damage of the coupler buffer device and even the casualties. Therefore, it is important to monitor the force applied to the coupler draft gear.

However, the coupler buffer device is designed in a mature modular mode, and meanwhile, due to the fact that the running environment of a vehicle is severe, the existing force sensor cannot be provided with a protection structure due to structural limitation, and therefore the existing force sensor cannot be applied to products of the existing coupler buffer device. Therefore, the train cannot obtain the data of the longitudinal pulling and pressing force borne by the coupler buffer device in the running process, and hidden danger is brought to the running safety of the train.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a draw pressure sensor for coupling to solve among the above-mentioned prior art train can't obtain the technical problem of the vertical pressure data that draws that coupling buffer bore in the operation process.

In order to realize the utility model aims at, the utility model adopts the following technical scheme:

a pull pressure sensor for a coupler comprises,

the sensor comprises a sensor shell, a plurality of strain gauges are arranged on the sensor shell; one end of the sensor shell is connected with the coupler body, and the other end of the sensor shell is connected with the energy absorption device;

and the protection assembly is arranged on the outer peripheral surface of the sensor shell, corresponds to the strain gauge and is used for protecting the strain gauge.

Preferably, the protection component comprises a protection shell, the protection shell comprises a first half protection shell and a second half protection shell which are arranged oppositely, and the first half protection shell is detachably connected with the second half protection shell.

Preferably, two ends of the first half protective shell are respectively provided with a first plugging part and a second plugging part;

a third plugging part and a fourth plugging part are respectively arranged at two ends of the second half protective shell; the third insertion part is connected with the first insertion part, and the fourth insertion part is connected with the second insertion part.

Preferably, the first half protective shell is positioned above the second half protective shell;

the first plugging part and the second plugging part have the same structure and extend downwards, and the third plugging part and the fourth plugging part have the same structure and extend upwards.

Preferably, the first inserting part and the second inserting part comprise a first outer side step and a first inner side step, and the horizontal plane of the first outer side step is lower than the horizontal plane of the first inner side step;

the third inserting part and the fourth inserting part comprise a second outer side step and a second inner side step, and the horizontal plane of the second outer side step is lower than the horizontal plane of the second inner side step;

wherein the first outer step is connected with the corresponding second outer step; the first inner side steps are connected with the corresponding second inner side steps.

Preferably, the device further comprises a retaining member, and the first half protective shell and the second half protective shell are fixedly connected through the retaining member.

Preferably, the protection assembly further comprises a sealing gasket, and the sealing gasket is arranged at the joint of the first half protection shell and the second half protection shell.

Preferably, the outer circumferential surface of the sensor shell is provided with at least two flanges in a surrounding manner, and the flanges are uniformly distributed on two sides of the strain gauge;

the two edge ends of the protective shell are respectively provided with a clamping groove, and the flange is clamped in the clamping grooves, so that the protective shell is tightly connected with the sensor shell.

Preferably, a sealing groove is formed in the flange, and a sealing ring is arranged in the sealing groove.

Preferably, the sensor shell is provided with a water leakage hole; and a drainer is arranged on the protective shell.

A car coupler buffer device comprises an energy absorption device, a car coupler body and a pull pressure sensor, wherein one end of the pull pressure sensor is fixedly connected with the energy absorption device, and the other end of the pull pressure sensor is fixedly connected with the car coupler body; and the pull pressure sensor is any one of the pull pressure sensors.

Compared with the prior art, the utility model discloses an advantage lies in with positive effect:

the utility model provides a pull pressure sensor for a car coupler, which comprises a sensor shell, wherein a plurality of strain gauges are arranged on the sensor shell; one end of the sensor shell is connected with the coupler body, and the other end of the sensor shell is connected with the energy absorption device. Namely, two ends of the pulling pressure sensor are respectively connected with the coupler body and the energy absorption device, so that the pulling pressure sensor is reasonably and effectively arranged on the coupler buffer device; meanwhile, a protection component is arranged on the outer peripheral surface of the sensor shell and corresponds to the strain gauge, and the strain gauge is protected. Therefore, the pull pressure sensor can be suitable for the running environment of the vehicle under the protection of the protection assembly.

Therefore, the structure not only enables the pulling pressure sensor to be reasonably and effectively arranged on the coupler buffering device, but also can be effectively adapted to the running environment of the vehicle. Therefore, the longitudinal pulling pressure borne by the coupler can be effectively obtained, and the technical problem that the longitudinal pulling pressure data of the coupler bearing cannot be obtained in the running process of a train in the prior art is solved.

Drawings

Fig. 1 is a schematic view of the overall structure of a pulling pressure sensor for a coupler according to the present invention;

fig. 2 is a schematic cross-sectional structural view of a pulling pressure sensor for a coupler according to the present invention;

fig. 3 is a left side view of a pulling pressure sensor for a coupler according to the present invention;

fig. 4 is a schematic view of a partial structure of a pulling pressure sensor for a coupler according to the present invention;

FIG. 5 is a schematic structural diagram 1 of a first half of a protective shell according to the present invention;

FIG. 6 is a schematic structural view of a first half of a protective shell according to the present invention, FIG. 2;

FIG. 7 is a schematic structural view of a second half of the protective shell of the present invention 1;

FIG. 8 is a schematic structural view of a second half of the protective shell of the present invention shown in FIG. 2;

fig. 9 is a front view of a pulling pressure sensor for a coupler according to the present invention;

FIG. 10 is a cross-sectional view taken along the arrows in FIG. 9;

in the above figures: 1. a sensor housing; 11. a first connection end; 12. a second connection end; 14. a flange; 15. a sealing groove;

2. a fixing assembly; 21. a first fixing member; 22. a second fixing member; 23. a connecting member; 24. a fastener;

3. a strain gauge; 4. a blocking plate;

5. a guard assembly; 51. a first half protective shell; 511. a first insertion part; 512. a second insertion part; 513. A locking member; 52. a second half protective shell; 521. a third mating portion; 522. a fourth mating portion; 523. a first mounting hole; 53. a first inside step; 54. a first outer step; 55. a second inside step; 56. a second outer step; 57. a card slot; 58. a second mounting hole; 59. a third mounting hole;

6. a gasket; 7. a water drainer; 8. fastening a bolt; 9. an energy absorbing device.

Detailed Description

The present invention is specifically described below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

In the description of the present invention, it should be noted that the terms "inside", "outside", "up", "down", "front", "back", "first", "second", "third", "fourth", etc. indicate the positional relationship based on the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, the terms "mounting", "connecting", "fixing", and the like are to be understood in a broad sense, for example, "connecting" may be a fixed connection, or may be a detachable connection, or may be an integral connection; either directly or through an intermediary profile. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The embodiment of the utility model provides an in technical scheme solved the train can't obtain the technical problem that the coupler bore vertically draws pressure data at the operation in-process, the general thinking is as follows:

the utility model provides a pull pressure sensor for a car coupler, which comprises a sensor shell, wherein a plurality of strain gauges are arranged on the sensor shell; one end of the sensor shell is provided with a first connecting end which is connected with the coupler body through the first connecting end; the other end of the sensor shell is provided with a second connecting end which is connected with the energy absorption device through the second connecting end. The two ends of the pulling pressure sensor are respectively connected with the coupler body and the energy absorption device, so that the pulling pressure sensor is reasonably and effectively arranged on the coupler buffering device, longitudinal pulling pressure borne by the coupler is obtained, and the technical problem that longitudinal pulling pressure data borne by the coupler cannot be obtained in the running process of a train in the prior art is solved.

In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.

A pull pressure sensor for a coupler comprises,

the sensor comprises a sensor shell 1, wherein a plurality of strain gauges 3 are arranged on the sensor shell 1;

the first connecting end 11 is arranged at one end of the sensor shell 1, and is connected with the coupler body through the first connecting end 11;

and the second connecting end 12 is arranged at the other end of the sensor shell 1, and is connected with an energy absorption device through the second connecting end 12.

The sensor housing 1 is a frame structure of the pull pressure sensor, in this embodiment, the sensor housing 1 is preferably a cylindrical structure, and the axial length of the sensor housing can be designed according to the distance between the coupler body and the energy absorbing device on the coupler buffer device, so that the pull pressure sensor can be applied to various vehicles, and the application range of the pull pressure sensor is expanded.

Specifically, the sensor housing 1 includes a cavity, a fixing component 2 is disposed in the cavity, and the sensor housing 1 and the energy absorber are fixedly connected by disposing the fixing component 2. A first thread is arranged on the inner wall of one end of the cavity close to the energy absorption device 9, and the sensor shell 1 is in threaded connection with the energy absorption device 9 through the first thread; the fixed component 2 is provided with second threads, and the fixed component 2 is in threaded connection with the energy absorption device 9 through the second threads; wherein the first thread and the second thread have different pitches or different rotation directions.

In this embodiment, the pitch of the first thread is greater than the pitch of the second thread. Through adopting above structure for be dual fixed connection structure between sensor housing 1 and the energy-absorbing device 9, through sensor housing 1 and the direct threaded connection of energy-absorbing device promptly, still make further threaded connection between energy-absorbing device 9 and the sensor housing 1 through fixed subassembly 2. And the thread pitches of the two thread structures are different, so that mutual rotation between the sensor shell 1 and the energy absorption device 9 under the action of external force is prevented, and the sensor shell 1 and the energy absorption device 9 are connected together more stably.

As shown in fig. 1 and 2, the cavity is divided into a first chamber and a second chamber by arranging this fixing member 2. The first chamber is a first connecting end 11, and the structure of the first connecting end 11 is matched with the structure of the coupler body, so that the first connecting end 11 is connected with the coupler body. The second cavity is a second connecting end 12, the structure of the second connecting end 12 is matched with the structure of the energy absorbing device 9, in this embodiment, an inner wall of the second cavity is provided with an internal thread, i.e., a first thread, an end portion of the energy absorbing device is provided with an external thread, and the end portion of the energy absorbing device is inserted into the second cavity and is in threaded connection with the second cavity, so that the second cavity is connected with the energy absorbing device 9 through the first thread.

In this embodiment, the outer diameter of the second chamber is the same as the outer diameter of the energy absorber 9, so that the sensor housing 1 in the second chamber can be used as a part of the energy absorber, and in the case that the total length of the coupler buffer device is fixed, the structure effectively utilizes the space by adopting a plug-in and threaded connection mode. Meanwhile, the sensor shell 1 and the energy absorption device are connected through threads, so that the stress of the tension and pressure sensor is more uniform, and the influence of stress concentration caused by processing deviation, deformation and the like is less, so that the measuring precision is ensured, and meanwhile, the two parts are more convenient to connect through the connecting structure.

More specifically, the fixing assembly 2 includes a first fixing piece 21 and a second fixing piece 22. The first fixing piece 21 is fixedly connected with the cavity, one end of the second fixing piece 22 is in threaded connection with the first fixing piece 21, and the other end of the second fixing piece is fixedly connected with the energy absorption device 9. In this embodiment, the first fixing member 21 is preferably a plate-shaped structure, and the structure of the first fixing member is matched with the structure of the cavity, so that the first fixing member 21 can be fixedly disposed in the cavity. And the first fixing member 21 is provided with a through hole. Meanwhile, the second fixing member 22 is a mounting seat, one end of the mounting seat is fixedly connected with the first fixing member 21, and the other end of the mounting seat is fixedly connected with the energy absorbing device 9. Specifically, the second fixing member 22 is provided with a through hole.

Further, the fixing assembly 2 further comprises a connecting member 23, and an external thread, i.e. a second thread, is arranged on the connecting member 23. Specifically, the connecting piece 23 comprises a fastening piece 24 and a bolt body, and the fastening piece 24 is provided with a threaded hole; the bolt body is provided with external threads, sequentially penetrates through the through holes of the second fixing piece 22 and the first fixing piece 21, and is in threaded connection with the fastening piece 24. Thereby, the sensor housing 1 and the energy absorber 9 are further connected by the connection of the connecting piece 23 to the first fastener 21 and the second fastener 22. So that the sensor housing 1 and the energy-absorbing device 9 are connected together by means of a first thread and a second thread, the connection 23 in this embodiment preferably being a fixing bolt and a fixing nut. Further, the through holes of the first fixing member 21 and the second fixing member 22 are disposed at the center of the shaft, that is, the connecting member 23 is mounted at the shaft center of the sensor housing 1 and the energy absorbing device 9.

Further, the thread pitch of the first threads is larger than that of the second threads, and due to the fact that the thread pitches of the two thread structures are different, mutual rotation between the sensor shell 1 and the energy absorption device under the action of external force is prevented, and therefore the sensor shell 1 and the energy absorption device are connected together more stably. Meanwhile, when the rotation directions of the first thread and the second thread are different, mutual rotation between the sensor shell 1 and the energy absorption device under the action of external force can be prevented, and therefore the sensor shell 1 and the energy absorption device are connected together more stably. Specifically, a preset torque is provided between the tension and pressure sensor and the energy absorption device 9 for protection, and the tension and pressure sensor has two movement directions, namely, screwing and unscrewing directions, relative to the energy absorption device 9 with reference to the energy absorption device 9. If the rotation is carried out towards the screwing direction, due to the existing designed torque force protection, the material is hardly deformed even if force is applied towards the screwing direction, so that the pull pressure sensor can hardly move towards the direction relative to the energy absorption device 9; if the energy absorber rotates in the unscrewing direction, not only the design torque force but also the pretightening force of the connecting piece 23 need to be overcome, and because the axial direction moves towards the direction separating the tension and pressure sensor and the energy absorber 9 when the tension and pressure sensor and the energy absorber are loosened, the connecting piece 23 and the tension and pressure sensor and the energy absorber cannot move synchronously because the screw pitches between the connecting piece 23 and the tension and pressure sensor and the energy absorber are different. Specifically, since the rotational force of the link 23 is provided by the sensor housing 1 when unscrewing, the rotational angle of the link 23 is equal to or smaller than the rotational angle of the sensor housing 1, and since the pitch of the sensor housing 1 and the energy absorbing device 9 is larger than the pitch of the link 23, i.e., the distance separating the sensor housing 1 and the energy absorbing device is necessarily larger than the distance separating the sensor housing 1 and the link 23, the process further elongates the link 23, i.e., elongates the anchor bolt.

According to Hooke's law

σ＝Εε＝E(ΔL/L)

So that Δ L ═ σ L/E ═ Fl/ES

When the fixing bolt is made of steel, the elastic modulus E is 2.06E¹¹Pa

After the structure is fixed, the stress length L, the sectional area S and the elastic modulus E of the fixing bolt are fixed, the extension length of the fixing bolt is only related to the tensile force F borne by the fixing bolt, and due to the fact that the elastic modulus is very large, the fixing bolt can be deformed by a relatively large amount delta L only when the force in the unscrewing direction is very large. From the above, if the tension sensor and the energy absorbing device 9 rotate or separate from each other, the fixing bolt is inevitably elongated, however, according to hooke's law, the fixing bolt must have a very large force to deform, so that it can be seen that the fixing bolt cannot be easily deformed, and therefore the sensor housing 1 and the energy absorbing device are difficult to rotate or separate from each other, so that the anti-loosening effect of the fixing bolt is achieved, and further, the fixing nut is preferably a lock nut, so that the loosening effect is further improved. Therefore, by adopting the structure, the tension sensor and the energy absorption device can be stably connected together.

Further, the second fixing member 22 is further provided with two fastening bolts, and the two fastening bolts are respectively arranged at two ends of the connecting member 23, so that the second fixing member 22 can be more stably connected with the energy absorbing device. As shown in fig. 3, in order to prevent the fastening bolt from falling into the first cavity of the sensor housing 1 after falling off, the first fixing member 21 is provided with a blocking member 4, and the blocking member 4 and the first fixing member 21 may be of an integral structure or a split structure. Specifically, the baffle 4 is preferably a plate-like structure, and the baffle 4 is a rotary body structure, and the relative rotation angle of the energy absorber and the tension/compression sensor having different structures varies after the energy absorber and the tension/compression sensor are tightened due to the difference in initial thread machining angle, manufacturing variation, and the like. However, when the blocking member 4 is of a revolving structure, the blocking member 4 can still function as a blocking member even if the relative angle is different.

In summary, the two ends of the tension and pressure sensor are respectively connected with the coupler body and the energy absorption device 9 by adopting the structure. Meanwhile, the tension and pressure sensor is connected with the energy absorption device 9 through a first thread and a second thread respectively, namely the sensor shell 1 is connected with the energy absorption device 9 through the first thread, and the sensor shell 1 is further connected with the energy absorption device 9 through the second thread of the fixing component 2; in addition, because the thread pitches of the first thread and the second thread are different, the mutual rotation and movement between the sensor shell 1 and the energy absorption device 9 are prevented, and the pull pressure sensor can be connected with the energy absorption device 9 more stably. Therefore, the pulling pressure sensor can be more effectively arranged on the coupler buffer device, so that the longitudinal pulling pressure borne by the coupler is obtained, and the technical problem that the longitudinal pulling pressure data borne by the coupler cannot be obtained in the running process of a train in the prior art is solved.

As shown in fig. 4, the strain gauge 3 of the tension and pressure sensor is disposed on the outer peripheral surface of the sensor housing 1, and in order to protect the strain gauge, a protection component 5 is further disposed in the embodiment, and the protection component 5 is disposed on the outer peripheral surface of the sensor housing 1 and is disposed corresponding to the strain gauge 3 for protecting the strain gauge 3.

Specifically, the protection component 5 is mainly configured to protect the strain gauge 3 and the outlet wire of the strain gauge 3. In this embodiment, the protection assembly 5 includes a protection shell, a sealing gasket 6 and a sealing ring. Since the water inlet direction can only be axial or radial, in this embodiment, the axial water inlet is mainly prevented by the cooperation of the protective shell and the sealing ring, and the radial water inlet is prevented by the cooperation of the protective shell and the sealing gasket 6.

As shown in fig. 5 to 8, the protection assembly 5 includes a protection shell, the protection shell includes a first half protection shell 51 and a second half protection shell 52, which are oppositely disposed, and the first half protection shell 51 is detachably connected to the second half protection shell 52. In this embodiment, a first inserting portion 511 and a second inserting portion 512 are respectively disposed at two end interfaces of the first half protection shell 51; a third inserting-connecting part 521 and a fourth inserting-connecting part 522 are respectively arranged at the interfaces at the two ends of the second half protective shell 52; the third mating part 521 is connected with the first mating part 511, and the fourth mating part 522 is connected with the second mating part 512, so that the first half protective case 51 and the second half protective case 52 are mated together. Further, a locking member 513 is disposed on the protecting shell, and the first half protecting shell 51 and the second half protecting shell 52 are more firmly connected together by the locking member 513. Meanwhile, in order to make the protective shell more stably arranged on the periphery of the sensor housing 1, in this embodiment, the second half protective shell 52 is provided with the threaded hole 523, the threaded hole 523 is arranged on the fastening bolt 8, and one end of the fastening bolt 8 penetrates through the threaded hole and abuts against the sensor housing 1, so that the connection stability between the protective shell and the sensor housing 1 is further improved.

In this embodiment, the first half of the protection shell 51 is located above the second half of the protection shell 52; the first mating part 511 and the second mating part 512 have the same structure and extend downward, and the third mating part 521 and the fourth mating part 522 have the same structure and extend upward. Further, the first inserting part 511 and the second inserting part 512 both include a first outer side step 54 and a first inner side step 53, and the horizontal plane of the first outer side step 54 is lower than the horizontal plane of the first inner side step 53; the third and fourth mating parts 521, 522 each include a second outer step 56 and a second inner step 55, and the horizontal plane of the second outer step 56 is lower than the horizontal plane of the second inner step 55. Wherein the first outboard step 54 meets its corresponding second outboard step 56; the first inner step 53 meets a corresponding second inner step 55. Through adopting above structure for the interface parcel that is located the first half protective housing 51 of top lives the interface that is located the second half protective housing 52 of below, thereby can make full use of gravity, when first half protective housing 51 has water (mainly for the rainwater) to leave, water leaves from first half protective housing 51. Meanwhile, since the second outer step 56 of the second half shield shell 52 is lower than the second inner step 55, even if water or dust, etc. enters the first half shield shell 51 from the gap of the interface in the radial direction, the second layer shield is equivalent to the second layer shield due to the blocking of the second inner step 55 of the second half shield shell 52, so that the water is difficult to enter the inside of the shield shell. Therefore, through adopting above structure, effectual water or dust of having prevented gets into in the protecting crust to the influence of water or dust etc. to foil gage 3 has been avoided in the environment.

As shown in fig. 10, in order to further enhance the radial sealing effect, in this embodiment, a sealing gasket 6 is further disposed between the first half protective shell 51 and the second half protective shell 52. When assembled, the first outer step 54 of the first half 51 and the second outer step 56 of the first half 51 compress the gasket 6, so that the gasket 6 further seals against the radial direction, i.e. forms a third stage of protection. Meanwhile, in order to facilitate installation and positioning, two installation holes can be formed in the sealing gasket 6 to be installed in cooperation with the locking member 513. As can be seen from the above, the combination of the first half protective shell 51, the second half protective shell 52 and the sealing gasket 6 forms a radial three-stage protective structure, so that the protective assembly 5 can effectively perform a protective function.

With continued reference to fig. 4, the sensor housing 1 is circumferentially provided with at least two flanges 14 on the outer circumferential surface thereof, and the flanges 14 are uniformly distributed on two sides of the strain gauge 3; two edge ends of the protective shell are respectively provided with a sealing end part 57, and the sealing end parts 57 cover the outer part of the flange 14, so that the protective shell is tightly connected with the sensor shell 1. Meanwhile, a sealing groove 15 is formed in the flange 14, and a sealing ring is arranged in the sealing groove 15. After the installation, first half protective housing 51 and sealing washer cooperation to form tertiary protective structure in the axial of protective housing, further strengthened the safeguard function of protective housing.

The second half protective shell 52 is also provided with a first mounting hole 58 for mounting a connector for wiring or outgoing of the strain gauge 3; meanwhile, the second half of the shield shell 52 is provided with a second mounting hole 59 for mounting the drain 8. Still be equipped with the hole that leaks on the sensor housing 1, can be with unexpected water inflow discharge through this hole that leaks, can also carry out the part inspection through this hole that leaks to further improve the protection stability of protecting crust, make draw pressure sensor can effectually acquire the vertical pressure of drawing that the coupling bore, solved among the prior art train in the operation process can't obtain the technical problem that the coupling bore vertically draws pressure data.

For a more clear description of the invention, the following description will be made of the installation process of the invention by taking the embodiment shown in fig. 1 to 10 as an example:

the bolt body of the connecting piece 23 is first inserted into the through hole of the second fixing piece 22, and the second fixing piece 22 is fixedly connected with the energy-absorbing device 9 through the bolt. At this time, the second fixing member 22 is fixedly mounted on the energy absorbing device 9, then this end of the energy absorbing device 9 is inserted into the cavity of the sensor housing 1 and connected together by the first screw thread, the bolt body of the connecting member 23 passes through the through hole of the first fixing member 21, and then the fastening member 24 is screwed to the bolt body to set a certain torque force, thereby connecting the first fixing member 21 and the second fixing member 22 together by the second screw thread. In summary, the first thread and the second thread can firmly connect the tension/pressure sensor and the energy absorber 9.

The cable for pulling the pressure sensor is passed through the second mounting hole of the second half-protecting shell 52, then the first half-protecting shell 51 and the second half-protecting shell 52 are plugged together, and the first half-protecting shell 51 and the second half-protecting shell 52 are further fixed by the locking member 513. After the positions of the first half protective shell 51 and the second half protective shell 52 are adjusted, the bolt is screwed into the threaded hole of the second half protective shell 52, one end of the bolt is abutted against the pull pressure sensor, and then the nut is screwed to fasten the second half protective shell 52. And the drain 8 is mounted to the first mounting hole of the second half of the shield shell 52. And finally, connecting the other end of the sensor shell 1 with the coupler body, thereby completing the installation of the pull pressure sensor.

The pulling pressure sensor is simple in structure and easy to install, and can be reasonably and effectively installed on the coupler buffer device. Through adopting above structure not only make to draw pressure sensor can reasonable effectual the installation on coupling buffer, can also effectually be adapted to in the environment of vehicle operation. Meanwhile, the invention simultaneously considers the factors of strength, precision, installation interface, installation space, protection and the like, and the invention is in modular design and is convenient for assembly and on-site operation and maintenance. Therefore, the longitudinal pulling pressure borne by the coupler can be effectively obtained by adopting the pulling pressure sensor, and the technical problem that the longitudinal pulling pressure data borne by the coupler cannot be obtained in the running process of a train in the prior art is solved.

Claims (11)

1. A pull pressure sensor for a coupler is characterized by comprising,

the sensor comprises a sensor shell, a plurality of strain gauges are arranged on the sensor shell; one end of the sensor shell is connected with the coupler body, and the other end of the sensor shell is connected with the energy absorption device;

and the protection assembly is arranged on the outer peripheral surface of the sensor shell, corresponds to the strain gauge and is used for protecting the strain gauge.

2. The pulling force sensor for the coupler of claim 1, wherein the protective assembly comprises a protective shell, the protective shell comprises a first half protective shell and a second half protective shell which are arranged oppositely, and the first half protective shell and the second half protective shell are detachably connected.

3. A pulling force sensor for a coupler according to claim 2,

a first plugging part and a second plugging part are respectively arranged at two ends of the first half protective shell;

a third plugging part and a fourth plugging part are respectively arranged at two ends of the second half protective shell; the third insertion part is connected with the first insertion part, and the fourth insertion part is connected with the second insertion part.

4. A pulling force sensor for a coupler according to claim 3,

the first half protective shell is positioned above the second half protective shell;

the first plugging part and the second plugging part have the same structure and extend downwards, and the third plugging part and the fourth plugging part have the same structure and extend upwards.

5. A pulling force sensor for a coupler according to claim 4,

the first inserting part and the second inserting part respectively comprise a first outer side step and a first inner side step, and the horizontal plane of the first outer side step is lower than the horizontal plane of the first inner side step;

the third inserting part and the fourth inserting part comprise a second outer side step and a second inner side step, and the horizontal plane of the second outer side step is lower than the horizontal plane of the second inner side step;

wherein the first outer step is connected with the corresponding second outer step; the first inner side steps are connected with the corresponding second inner side steps.

6. The pulling pressure sensor for the coupler as defined in any one of claims 2 to 5, further comprising a locking member, wherein the first half protective shell and the second half protective shell are fixedly connected through the locking member.

7. A pulling pressure sensor for a coupler according to any one of claims 2-5, wherein the protecting assembly further comprises a sealing gasket, and the sealing gasket is arranged at the joint of the first half protecting shell and the second half protecting shell.

8. A pulling force sensor for a coupler according to claim 2,

flanges are arranged on the outer peripheral surface of the sensor shell in a surrounding mode, and the number of the flanges is at least two, and the flanges are uniformly distributed on two sides of the strain gauge;

the two edge ends of the protective shell are respectively provided with a clamping groove, and the flange is clamped in the clamping grooves, so that the protective shell is tightly connected with the sensor shell.

9. A pulling pressure sensor for a coupler as defined in claim 8, wherein the flange has a sealing groove formed therein, and wherein a seal ring is disposed in the sealing groove.

10. The pulling pressure sensor for the coupler as defined in any one of claims 3 to 5, wherein the sensor housing is provided with a water leakage hole, and the protective shell is provided with a water drainer.

11. A car coupler buffer device is characterized by comprising an energy absorption device, a car coupler body and a pull pressure sensor, wherein one end of the pull pressure sensor is fixedly connected with the energy absorption device, and the other end of the pull pressure sensor is fixedly connected with the car coupler body; and the pull pressure sensor is the pull pressure sensor as claimed in any one of claims 1 to 10.

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