CN210664842U

CN210664842U - Force measuring sensor

Info

Publication number: CN210664842U
Application number: CN201921678041.0U
Authority: CN
Inventors: 楼微然; 李建梅; 沈建良; 张婷婷
Original assignee: Netreach Technologies Hangzhou Co ltd
Current assignee: Netreach Technologies Hangzhou Co ltd
Priority date: 2019-10-09
Filing date: 2019-10-09
Publication date: 2020-06-02
Anticipated expiration: 2029-10-09

Abstract

The utility model discloses a force cell sensor, connect and the connector including sensor main part, tablet, resistance strain gauge, wire, the top of sensor main part is provided with the protection casing, and the welding of protection casing top left part has the pivot, the pivot right-hand member has cup jointed the apron, and laps the top right part and be fixed with the handle, the welding has the connecting block on the apron on handle right side, and the connecting block right-hand member is fixed with the block, the symmetrical welding has the stopper around the protection casing top on connecting block right side, the stopper has all run through the dead lever with the block inside. This force cell sensor has solved the resistance foil gage of current force cell sensor and the problem that the binder absorbs water and plasticizes, has improved the life of device, has solved the comparatively complicated problem of split of current wire and connector, avoids leading to the wire winding to damage when the split wire connects, has improved the practicality of device.

Description

Force measuring sensor

Technical Field

The utility model relates to a force cell sensor technical field specifically is a force cell sensor.

Background

After the force sensor is acted by external force, the strain gauge adhered on the elastic body deforms along with the external force to cause resistance change, the resistance change leads the formed Wheatstone bridge to lose balance and output an electric quantity signal which changes in linear proportion with the external force, so as to detect the force, when the force is not positioned at the middle of the tray, the tray can be applied with an offset load force, at the moment, the unbalance loading force can affect the deformation of the strain gauge, the stress plate on the force measuring sensor is kept clean and pollution-free, and the resistance strain foil and the strain foil adhesive layer on the elastic element can absorb the moisture in the air to generate plasticization after being exposed in the air for a long time, the top end of the elastic element of the existing force measuring sensor is not provided with a protective structure, after the use is finished, the bonding strength of the material is easy to reduce after long-term storage, and the output is irregularly changed until the force sensor fails;

in addition, the connection of the wires of the conventional force sensor is generally threaded, and when the force sensor is maintained and disassembled, the force sensor is separated from the sensor by rotation, and the external wires of the force sensor generally have a certain length, so that the force sensor is inconvenient to rotate and can be wound, and therefore a force sensor is urgently needed to solve the problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a force cell sensor to solve the current force cell sensor who proposes among the above-mentioned background art and do not possess protective structure and the more complicated problem of wire dismantlement operation.

In order to achieve the above object, the utility model provides a following technical scheme: a force transducer comprises a transducer body, an induction plate, a resistance strain gauge, a wire connector and a connector, wherein the top end of the transducer body is provided with a protective cover, the left part of the top end of the protective cover is welded with a rotating shaft, the right end of the rotating shaft is sleeved with a cover plate, the right part of the top end of the cover plate is fixed with a handle, the cover plate on the right side of the handle is welded with a connecting block, the right end of the connecting block is fixed with a clamping block, the top end of the protective cover on the right side of the connecting block is symmetrically welded with a limiting block in a front-back mode, the limiting block and the clamping block are internally provided with a fixed rod in a penetrating mode, the lower part of the right side of the transducer body is provided with a fixed cavity, the right side of the fixed cavity is welded with a connecting cavity, the wire connector is sleeved, first springs are welded between the first placing cavity and the moving block, fixing plates matched with the moving block are arranged on the inner walls of the fixing cavities, clamping cavities are welded on the inner walls of the connecting cavities equally, clamping plates matched with the clamping cavities are arranged on the outer surfaces of the lead connectors, a second placing cavity is formed in the inner wall of the connecting cavity on one side of the clamping cavity, fixing blocks are arranged in the second placing cavity, and second springs are welded between the fixing blocks and the second placing cavity.

Preferably, the top of tablet is equallyd divide and is provided with resistance strain gauge, and all be provided with on the tablet of resistance strain gauge bottom rather than complex bonding groove, resistance strain gauge's shape all sets up to the arc with tablet top complex.

Preferably, the length of apron is greater than the length of tablet, the slot hole with dead lever complex is all seted up inside block and the stopper.

Preferably, the fixing plates are all arranged in a clockwise inclined shape, and the maximum compression height of the first spring is larger than the height from the top end of the first placing cavity to the top end of the fixing plate.

Preferably, the clamping plate and the clamping cavity are both in the shape of an arc matched with the wire connector, the arc length of the clamping plate is less than one tenth of the arc length of the connecting cavity, and notches matched with the clamping plate are formed in the side wall of the clamping cavity at one end of the fixing block.

Compared with the prior art, the beneficial effects of the utility model are that:

1. this force cell sensor is provided with the protection casing, the bonding groove, the apparatus further comprises a rotating shaft, the apron, the handle, the connecting block, the block of block, stopper and dead lever, inject the thickness of resistance strain gauge bottom binder glue film through the bonding groove, when sealed to the binder protection, prevent the too thick variability of binder, lead to stability to reduce, protect the tablet top through the protection casing, when needs use, take out the dead lever and stimulate the handle open the apron can, take out dynamometry object when the use finishes, closed apron and fixed can, the problem of water plasticization in the resistance strain gauge and the binder absorption air of having solved current force cell sensor, the life of device has been improved.

2. This force cell sensor is provided with the first chamber of placing, the movable block, first spring, the fixed plate, the block board, the block chamber, the chamber is placed to the second, fixed block and second spring, when needs split wire connects, only need clockwise rotation wire to connect, make the block board extrusion fixed block, and shift out from the block chamber, the fixed plate is relieved to the fixed extrusion of movable block simultaneously, connect the wire again from fixed chamber with connect the chamber pull out can, the comparatively complicated problem of split of current wire and connector has been solved, avoid leading to the wire winding to damage when the split wire connects, the practicality of device has been improved.

Drawings

FIG. 1 is a schematic sectional view of the front view of the structure of the present invention;

fig. 2 is a partial front sectional view of the connection structure of the present invention;

fig. 3 is an enlarged schematic view of the structure at a in fig. 1 according to the present invention;

fig. 4 is an enlarged schematic view of the structure at B in fig. 1 according to the present invention;

fig. 5 is a schematic side sectional view of the internal connection structure of the fixed chamber of the present invention;

fig. 6 is a schematic side view of the internal connection structure of the connection cavity of the present invention.

In the figure: 1. a sensor body; 2. an induction plate; 3. a protective cover; 4. a bonding groove; 5. a resistance strain gauge; 6. a rotating shaft; 7. a cover plate; 8. a handle; 9. connecting blocks; 10. a clamping block; 11. a limiting block; 12. fixing the rod; 13. a fixed cavity; 14. a connecting cavity; 15. a wire connection; 16. a connector; 17. a first placing cavity; 18. a moving block; 19. a first spring; 20. a fixing plate; 21. a clamping plate; 22. a clamping cavity; 23. a second placing cavity; 24. a fixed block; 25. a second spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides an embodiment: a force measuring sensor comprises a sensor body 1, an induction plate 2, a resistance strain gauge 5, a lead connector 15 and a connector 16, wherein the top end of the induction plate 2 is equally provided with the resistance strain gauges 5, the induction plate 2 at the bottom end of the resistance strain gauge 5 is provided with a bonding groove 4 matched with the induction plate, the resistance strain gauge 5 is an element for measuring strain and can convert the strain change on a mechanical component into resistance change, the resistance strain gauge 5 is formed by winding a constantan wire or a nickel-chromium wire with phi of 0.02-0.05mm into a grid shape (or corroding a thin metal foil into the grid shape) and clamping the grid shape in two layers of insulating sheets (substrates), the resistance strain gauge 5 is connected with a strain gauge wire grid by using a silver-plated copper wire and serves as a lead wire of the resistance gauge, the shapes of the resistance strain gauges 5 are all set into arc shapes matched with the top end of the induction plate 2 and serve as limiting the thickness of a bonding agent layer at the bottom end of the resistance strain gauge 5 through the bonding groove 4, when the force is not positioned in the center of the tray, the tray can be subjected to unbalance loading force, at the moment, the unbalance loading force can influence the deformation of the resistance strain gauge 5, so that the device can prevent unbalance loading through the resistance strain gauge 5, the top end of the sensor main body 1 is provided with the protective cover 3, the left part of the top end of the protective cover 3 is welded with the rotating shaft 6, the right end of the rotating shaft 6 is sleeved with the cover plate 7, the right part of the top end of the cover plate 7 is fixed with the handle 8, the cover plate 7 on the right side of the handle 8 is welded with the connecting block 9, the right end of the connecting block 9 is fixed with the clamping block 10, the front and back symmetrical welding of the top end of the protective cover 3 on the right side of the connecting block 9 is provided with the limiting blocks 11, the fixing rods 12 penetrate through the limiting blocks 11 and the clamping blocks 10, the length of the cover plate 7 is greater than that of the sensing plate 2, the, when its effect is opened apron 7 for the assurance, the measured object can be placed on induction plate 2 top, guarantees the normal dynamometry of device, also through dead lever 12 with stopper 11 and block 10 fixed connection, prevents that apron 7 is rotatory to be opened when removing, can't protect induction plate 2.

The sensor comprises a sensor body 1, a fixed cavity 13 is arranged at the lower part of the right side of the sensor body 1, a connecting cavity 14 is welded at the right side of the fixed cavity 13, a wire joint 15 is sleeved inside the fixed cavity 13 and the connecting cavity 14, a connector 16 is arranged at the left side of the fixed cavity 13, a first placing cavity 17 is welded on the wire joint 15 at the right side of the connector 16 equally, moving blocks 18 are arranged inside the first placing cavity 17, first springs 19 are welded between the first placing cavity 17 and the moving blocks 18, fixed plates 20 matched with the moving blocks 18 are arranged on the inner walls of the fixed cavity 13, the fixed plates 20 are all in a clockwise inclined shape, the maximum compression height of the first springs 19 is larger than the height from the top end of the first placing cavity 17 to the top end of the fixed plates 20, and the fixed plates can not only move into a clamping cavity 22 but also gradually extrude the moving blocks 18 by the fixed plates, the arc lengths of the fixed plate 20, the engaging plate 21 and the engaging cavity 22 are equal, so that when the engaging plate 21 is completely engaged in the engaging cavity 22, the moving block 18 can abut against the highest end of the fixed plate 20, so that the fixed plate 20 fixes the wire connector 15 through the moving block 18, the engaging cavity 22 is uniformly welded on the inner wall of the connecting cavity 14, the engaging plate 21 matched with the engaging cavity 22 is arranged on the outer surface of the wire connector 15, the shapes of the engaging plate 21 and the engaging cavity 22 are both set to be arc-shaped matched with the wire connector 15, the arc length of the engaging plate 21 is less than one tenth of the arc length of the connecting cavity 14, notches matched with the engaging plate 21 are arranged on the side wall of the engaging cavity 22 at one end of the fixed block 24, and the notches are used for ensuring that the engaging plate 21 can be engaged in the engaging cavity 22 when the wire connector 15 is rotated counterclockwise, and the engaging plate 21 can be completely removed from the engaging, all seted up the second on the connection chamber 14 inner wall of block chamber 22 one side and placed chamber 23, and the second is placed chamber 23 inside and all is provided with fixed block 24, fixed block 24 and second are placed and all have been welded between the chamber 23 second spring 25, the maximum compression distance of second spring 25 is greater than the block board 21 outer end and places the distance between the chamber 23 inner wall to the second, guarantee that block board 21 can be through extrusion fixed block 24, make fixed block 24 compression second spring 25 remove to the second place the chamber 23 inside, thereby guarantee that block chamber 22 continues to rotate to block chamber 22 inside.

The working principle is as follows: when needs bonding resistance strain gauge 5, at first scribble the binder inside full bonding groove 4, press resistance strain gauge 5 on the binder again can, when needs use device, at first pull out dead lever 12 from stopper 11 and block piece 10, pull handle 8 again, make apron 7 rotate under the complex of pivot 6 and open, after the dynamometry, pulling handle 8 drives apron 7 and rotates, when apron 7 rotates the level, block piece 10 block is between two stopper 11, and can in inserting stopper 11 and block piece 10's slotted hole with dead lever 12.

When the lead connector 15 needs to be disassembled and maintained, firstly, the lead connector 15 is rotated anticlockwise, so that the clamping plate 21 on the lead connector 15 extrudes the fixed block 24, the fixed block 24 compresses the second spring 25 to move into the second placing cavity 23, the lead connector 15 continues to rotate until the clamping plate 21 is completely moved out of the clamping plate 21, at the moment, the movable block 18 is driven by the lead connector 15 to move to the lowest position of the fixed plate 20, the extrusion of the fixed plate 20 on the movable block 18 is released, so that the movable block 18 does not compress the first spring 19 any more, the reaction force generated by the first spring 19 disappears, so that the fixing of the fixed cavity 13 on the lead connector 15 is released, the lead connector 15 is pulled out towards the right end, when the lead needs to be installed, the clamping plate 21 and the clamping cavity 22 are in dislocation alignment, the lead connector 15 is inserted into the fixed cavity 13, so that the left end of the lead connector 15 is abutted, and the clockwise wire connector 15 is rotated, so that the clamping plate 21 extrudes the fixed block 24 to move to the inside of the clamping cavity 22, when the clamping plate 21 completely moves to the inside of the clamping cavity 22, the extrusion force of the clamping plate 21 on the fixed block 24 disappears, the fixed block 24 pops out under the action of the reaction force of the second spring 25, the clamping plate 21 is clamped in the clamping cavity 22, meanwhile, the moving block 18 rotates to the top end of the fixed plate 20, so that the fixed plate 20 compresses the first spring 19 through the moving block 18, and the reaction force generated by the first spring 19 acts on the wire connector 15, so that the wire connector 15 is fixed more firmly.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a force cell sensor, includes sensor main part (1), tablet (2), resistance strain gauge (5), wire connector (15) and connector (16), its characterized in that: the sensor comprises a sensor body (1), and is characterized in that a protective cover (3) is arranged at the top end of the sensor body (1), a rotating shaft (6) is welded at the left end of the top end of the protective cover (3), a cover plate (7) is sleeved at the right end of the rotating shaft (6), a handle (8) is fixed at the right end of the top end of the cover plate (7), a connecting block (9) is welded on the cover plate (7) on the right side of the handle (8), a clamping block (10) is fixed at the right end of the connecting block (9), limiting blocks (11) are symmetrically welded at the front and back of the top end of the protective cover (3) on the right side of the connecting block (9), fixing rods (12) penetrate through the limiting blocks (11) and the clamping block (10), a fixed cavity (13) is arranged at the lower part of the right side of the sensor body (1), a connector (16) is arranged on the left side of the fixed cavity (13), a first placing cavity (17) is welded on the wire connector (15) on the right side of the connector (16) uniformly, and the first placing cavity (17) is internally provided with a moving block (18), a first spring (19) is welded between the first placing cavity (17) and the moving block (18), the inner wall of the fixed cavity (13) is provided with a fixed plate (20) matched with the moving block (18), clamping cavities (22) are welded on the inner wall of the connecting cavity (14) uniformly, clamping plates (21) matched with the clamping cavities (22) are arranged on the outer surface of the lead joint (15), a second placing cavity (23) is arranged on the inner wall of the connecting cavity (14) at one side of the clamping cavity (22), and the second is placed chamber (23) inside and all is provided with fixed block (24), all weld between fixed block (24) and the second and place chamber (23) second spring (25).

2. A load cell according to claim 1, wherein: the top of tablet (2) is equallyd divide and is provided with resistance strain gauge (5), and all be provided with on tablet (2) of resistance strain gauge (5) bottom rather than complex bonding groove (4), the shape of resistance strain gauge (5) all sets up to the arc with tablet (2) top complex.

3. A load cell according to claim 1, wherein: the length of apron (7) is greater than the length of tablet (2), block piece (10) and stopper (11) are inside all to be seted up with dead lever (12) complex slotted hole.

4. A load cell according to claim 1, wherein: the fixing plates (20) are all arranged to be clockwise inclined, and the maximum compression height of the first spring (19) is larger than the height from the top end of the first placing cavity (17) to the top end of the fixing plates (20).

5. A load cell according to claim 1, wherein: the clamping plate (21) and the clamping cavity (22) are both in the shape of an arc matched with the wire connector (15), the arc length of the clamping plate (21) is less than one tenth of the arc length of the connecting cavity (14), and notches matched with the clamping plate (21) are formed in the side wall of the clamping cavity (22) at one end of the fixing block (24).