CN217179727U

CN217179727U - Modular column type weighing sensor

Info

Publication number: CN217179727U
Application number: CN202220255175.7U
Authority: CN
Inventors: 吴科杰
Original assignee: Zhejiang Yuzhuo Iot Technology Co ltd
Current assignee: Zhejiang Yuzhuo Iot Technology Co ltd
Priority date: 2022-02-08
Filing date: 2022-02-08
Publication date: 2022-08-12
Anticipated expiration: 2032-02-08

Abstract

The utility model relates to a modular column type weighing sensor, it includes the sensor body, and the sensor body includes last pressure head, column type elastomer and the lower pressure head that top-down set gradually, and on the bottom plate of weighing was located to lower pressure head, column type elastomer and last pressure head radially can dismantle fixedly through self-locking module, and the outer cover of column type elastomer is equipped with dustproof protection module. The self-locking structure of the column type weighing sensor is stable, stable locking effect can be guaranteed when a moving object is weighed, dustproof effect is good, sealing performance is good, and impact resistance is strong.

Description

Modular column type weighing sensor

Technical Field

The utility model relates to a weighing sensor technical field, more specifically say a modular column type weighing sensor.

Background

The column type weighing sensor is a core component in electronic weighing and metering equipment, and the working principle of the column type weighing sensor is that when a heavy object passes through an upper pressure head, an elastic body deforms, a strain gauge arranged in a strain hole of the elastic body prevents the change along with the deformation of the elastic body, outputs a corresponding electric signal when the resistance value changes, and finally converts the electric signal into weight information of the weighing object which can be visually identified through instrument acquisition.

The last pressure head of column type sensor or direct and the contact of object of weighing, or connect the weighing plate back on it and the indirect contact of object of weighing, the last pressure head of traditional column type weighing sensor and the vertical projection face of column type elastomer cooperation position are circular, consequently in the weighing process, especially carry out the in-process of weighing to the moving part, because call the difference of heavy object locating place, factors such as object activity, the pressure that goes up the pressure head contact surface and receive is inhomogeneous and the perk, receive the influence of skew power simultaneously easily, and then make the column type elastomer also can't receive even pressure, cause whole column type weighing sensor to empty, receive the influence of deflection power simultaneously, cause its and the wearing and tearing of last pressure head contact surface.

To this end, chinese patent publication No. CN215114803U, entitled "self-locking pillar type weighing cell", describes an improvement that includes a cell body (corresponding to a pillar type elastic body), and an upper pressure head and a lower pressure head that are clearance-fitted with the cell body; wherein, upward be equipped with in the pressure head and be used for realizing pressure head and sensor body temporary fixation's first locking Assembly, be equipped with in the pressure head down equally and be used for realizing pressure head and sensor body temporary fixation's second locking Assembly down, this technical scheme makes the pressure head, the pressure head keeps as an organic whole with the sensor body respectively down through first locking piece subassembly and second locking Assembly, thereby the adverse effect that inhomogeneous pressure and deflection force caused when reducing to weigh, make whole column type weighing sensor more stable, and prevent sensor body wearing and tearing.

However, the self-locking structure of the above patent is not stable in practical use, and the first locking assembly and the second locking assembly are fixed between the upper pressure head and the lower pressure head and the sensor body by rotating the rotary snap ring to press the positioning beads into the annular groove of the upper pressure head/the lower pressure head, so that the positioning columns roll when the rotary snap ring rotates, and therefore the phenomenon that the rotary snap ring slips can occur, which affects the self-locking effect.

SUMMERY OF THE UTILITY MODEL

To above circumstances, for overcoming the self-locking structure of the column type weighing sensor among the above prior art unstable, the auto-lock effect is not good, simultaneously because lack the problem that the protection takes place contact failure and structural damage easily, the utility model aims at providing a self-locking structure is firm, also can guarantee firm locking effect when the moving object of weighing, and dustproof effectual, the closure is good simultaneously, and the strong column type weighing sensor of impact resistance.

In order to achieve the above object, the technical solution of the present invention is:

the utility model provides a modular column type weighing sensor, it includes the sensor body, and the sensor body includes last pressure head, column type elastomer and the lower pressure head that top-down set gradually, and on the bottom plate of weighing was located to the lower pressure head, column type elastomer and last pressure head were radially can dismantle fixedly through from the locking module, and the outer cover of column type elastomer is equipped with dustproof protection module.

Preferably, the column-type elastic body and the upper pressure head are respectively provided with a first positioning hole and a second positioning hole along the radial direction, the self-locking module comprises a push rod, a threaded sleeve and a spring, the threaded sleeve is arranged in the second positioning hole, the inner pipe section of the threaded sleeve is provided with opposite fixing plates, the two fixing plates are provided with opposite through holes, the push rod is inserted in the threaded sleeve, one end of the push rod penetrates through the two through holes to extend outwards, a convex block is formed on the part of the outer wall of the push rod, which is positioned between the two fixing plates, and the spring is sleeved between the convex block and the fixing plate, which is close to one side of the large-inner-diameter section.

Preferably, the outer wall of the push rod is further provided with at least one limiting plate, one end, away from the upper pressure head, of the threaded sleeve is provided with limiting grooves in one-to-one correspondence to the limiting plates, and the limiting plates are inserted into the corresponding limiting grooves.

Preferably, the dustproof protection module comprises a protection outer cover, the lower end of the protection outer cover is fixed with the weighing bottom plate, the upper end of the protection outer cover is provided with a mounting hole opposite to the lower pressing head, and the column type elastic body penetrates through the mounting hole.

Preferably, the dustproof protection module further comprises an annular protective inner cover which is sleeved on the column-type elastic body, is embedded between the column-type elastic body and the mounting hole and is in interference fit with the column-type elastic body and the mounting hole.

Preferably, the dustproof protection module further comprises a protection inner cover, wherein the protection inner cover is annular and is sleeved on the column type elastic body and buckled at the upper end of the lower pressure head, and the inner edge of the protection inner cover is in interference fit with the lower pressure head and the column type elastic body.

Preferably, a wiring port for the column type elastic body cable to pass through is formed on the protective outer cover, a protective rubber ring is embedded in the wiring port, and the column type elastic body cable passes through the rubber ring and extends outwards.

Preferably, the shape of the vertical projection plane of the upper indenter is an arbitrary shape.

Preferably, the lower end of the protective housing is fixed to the weighing bottom plate by high-strength bolts or by welding.

Preferably, the weighing bottom plate is provided with a horizontal bubble.

Compared with the prior art, the utility model has the advantages of:

the self-locking structure of the utility model is arranged along the radial direction, so that the self-locking structure is in surface-to-surface contact with the upper pressure head and the sensor body, thereby preventing the self-locking structure from slipping and causing the fixing state of the upper pressure head and the column type elastic body to be released accidentally, and ensuring the fixing effect of the upper pressure head and the column type elastic body to be more stable;

outside the column type elastomer was located to dustproof protection module cover, so can form the protection to the column type elastomer, both prevented that rain and snow dust etc. from getting into in the strain hole of column type elastomer, avoid causing strainometer contact failure's problem, also can reduce the impact force that the column type elastomer received simultaneously when receiving the foreign object striking to form the comprehensive protection to the column type elastomer, make whole sensor have longer life.

Drawings

FIG. 1 is a schematic view of the overall structure of the weighing sensor of the present invention;

FIG. 2 is a schematic view of an exploded structure of the weighing sensor of the present invention;

fig. 3 is a schematic side sectional structure view of the weighing sensor of the present invention;

fig. 4 is an enlarged schematic view of a portion a of fig. 3 according to the present invention;

fig. 5 is an enlarged schematic view of a portion B of fig. 3 according to the present invention;

fig. 6 is a schematic side sectional view of another perspective of the load cell of the present invention;

fig. 7 is an enlarged schematic view of a portion B of fig. 6 according to the present invention.

As shown in the figure:

1. an upper pressure head; 101. a second positioning hole; 2. a columnar elastic body; 201. a first positioning hole; 3. a lower pressure head; 4. weighing the bottom plate; 5. a push rod; 501. a bump; 502. a limiting plate; 6. a threaded bushing; 601. a fixing plate; 601a, a through hole; 602. a limiting groove; 7. a spring; 8. a protective outer cover; 801. mounting holes; 802. a wiring port; 9. a protective inner cover; 10. a protective inner cover; 11. a protective rubber ring; 12. a high strength bolt; 13. horizontal bubble.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are usually placed when in use, and the terms are only used for simplifying the description, but do not indicate or imply that the directions are the specific directions and the specific directions structures and operations that the products must have, and therefore, the present invention should not be construed as being limited.

As shown in figures 1 and 2, a modular column type weighing sensor comprises a sensor body, which is consistent with the conventional column type weighing sensor, the sensor body comprises an upper pressure head 1, a column type elastic body 2 and a lower pressure head 3 which are sequentially arranged from top to bottom, a lower connecting groove is arranged on the lower end surface of the upper pressure head 1, the lower connecting groove is sleeved on the upper end of the column type elastic body 2, an upper connecting groove is arranged on the upper end surface of the lower pressure head 3, the lower end of the column type elastic body 2 is inserted into the lower connecting groove, so as to realize the connection of the three, the lower pressure head 3 is arranged on a weighing bottom plate 4, the lower pressure head 3 is fixedly connected with the weighing bottom plate 4 through bolts, a lateral connecting hole which is connected with a weighing platform through bolts is arranged on the lateral side of the weighing bottom plate 4, when the position of the sensor body needs to be changed, the whole sensor body can be driven to move only through the movement of the weighing bottom plate 4, therefore, the sensor body does not need to be repeatedly disassembled and assembled, the precision of the sensor body cannot be influenced by repeated disassembly and assembly, the upper pressure head 1 can also be connected with the weighing top plate through a bolt, so that the contact area of the upper pressure head and the weighing object is increased, the weighing object is prevented from toppling over, the column type elastic body 2 and the upper pressure head 1 are connected into a whole through the self-locking module, the self-locking module is simultaneously arranged along the radial directions of the upper pressure head 1 and the column type elastic body 2, the upper pressure head 1 and the column type elastic body 2 are radially and detachably fixed, so that when the upper pressure head 1 is subjected to deflection force, the relative rotation between the upper pressure head and the column type elastic body 2 can be avoided, the damage to the column type elastic body 2 caused by friction is reduced, and when the upper pressure head 1 is not completely contacted with the weighing object or is called as a movable object, the pressure on the upper contact surface of the upper pressure head 1 is uneven, the tilting of the upper pressure head can be avoided, the problem that the column type elastic body 2 is damaged due to the fact that the column type elastic body 2 is excessively extruded by the tilting side is solved, and the service life of the sensor body is prolonged;

meanwhile, compared with the prior art, the self-locking structure of the utility model is arranged along the radial direction, so that the self-locking structure is in surface-to-surface contact with the upper pressure head 1 and the sensor body, thereby preventing the self-locking structure from slipping and accidentally releasing the fixed state of the upper pressure head 1 and the column type elastic body 2, so that the fixed effect of the upper pressure head 1 and the column type elastic body 2 is more stable;

in addition, 2 overcoat of column type elastomer is equipped with dustproof protection module, based on dustproof protection module suit in the outside of column type elastomer 2, the event can form the protection to column type elastomer 2, both prevent into in the strain hole of column type elastomer 2 such as sleet dust, avoid causing the problem of strainometer contact failure, also can be when receiving the foreign object striking simultaneously, reduce the impact force that column type elastomer 2 received, thereby form the comprehensive protection to column type elastomer 2, make whole sensor have longer life.

As shown in fig. 2 and 4, the column elastic body 2 and the upper ram 1 are respectively provided with a first positioning hole 201 and a second positioning hole 101 along a radial direction, it should be mentioned that axes of the first positioning hole 201 and the second positioning hole 101 are located on a same horizontal plane, the self-locking module comprises a push rod 5, a threaded sleeve 6 and a spring 7, the threaded sleeve 6 is arranged in the second positioning hole 101, an inner tube section of the threaded sleeve is provided with opposite fixing plates 601, opposite through holes 601a are formed on the two fixing plates 601, the push rod 5 is inserted into the threaded sleeve 6, one end of the push rod extends outwards through the two through holes 601a, a projection 501 is formed on a part of an outer wall of the push rod 5 located between the two fixing plates 601, the spring 7 is sleeved between the projection 501 and the fixing plate 601 near a large inner diameter section, it should be mentioned that the spring 7 is always pressed by the projection 501 and the fixing plate 601 against it, thereby keeping a compression state between the two fixing plates 601, when the push rod 5 is not subjected to external force, the spring 7 pushes the convex block 501 back to the direction away from the fixed plate 601 abutted against the convex block through the elasticity of the spring, so that the whole push rod 5 is driven to move, at the moment, the end part of the push rod 5 can be inserted into the first positioning hole 201 of the column type elastic body 2, under the action of the push rod 5, the upper pressure head 1 and the column type elastic body 2 can be prevented from rotating relatively, further fixing between the upper pressure head 1 and the column type elastic body 2 is realized, only when the push rod 5 is pulled outwards, the spring 7 is further compressed by the convex block 501, the part of the push rod 5 positioned in the first positioning hole 201 is separated from the first positioning hole 201, at the moment, the unlocking of the upper pressure head 1 and the column type elastic body 2 can be completed, the disassembly and assembly are convenient, the self-locking module has a simple structure, is convenient to fix/unlock, and only when the push rod 5 moves outwards, the unlocking of the upper pressure head 1 and the column type elastic body 2 can be completed, therefore, the locking fixing effect is good.

As shown in fig. 2 and 4, at least one limiting plate 502 is further formed on the outer wall of the pushing rod 5, the number of the fiber plates is not particularly limited, and when a plurality of limiting plates 502 are formed, the opening and closing angle between the limiting plates 502 is also not particularly limited, in the present invention, two limiting plates 502 are provided, the opening and closing angle of the two limiting plates 502 is 180 °, one end of the threaded sleeve 6 away from the upper pressing head 1 is provided with a limiting groove 602 corresponding to the limiting plate 502, the limiting plates 502 are inserted into the corresponding limiting grooves 602, the arrangement of the limiting plates 502 and the limiting grooves 602 enables the pushing rod 5 to be automatically kept in a state of being separated from the first positioning hole 201 when the pushing rod 5 is separated from the first positioning hole 201 and the limiting plates 502 are separated from the limiting grooves 602, by rotating the pushing rod 5, the limiting plate 502 is abutted to the outer wall of the threaded sleeve 6 on the peripheral side of the limiting groove 602, so that the push rod 5 can be prevented from returning due to the elastic force of the spring 7, the push rod 5 can be automatically kept in a state of being separated from the first positioning hole 201, the push rod 5 does not need to be manually controlled by an operator to be kept in a state of being separated from the first positioning hole 201, and the upper pressure head 1 and the column type elastic body 2 are greatly convenient to disassemble and assemble.

As shown in fig. 1 to 3 and fig. 6, the dustproof protection module includes a protection housing 8, the lower end of the protection housing 8 is fixed to the weighing bottom plate 4, and the upper end thereof is provided with a mounting hole 801 opposite to the lower pressing head 3, the column type elastic body 2 penetrates through the mounting hole 801, so that the protection housing 8 can be sleeved on the outer wall of the column type elastic body 2, the protection housing 8 is fixed to the weighing bottom plate 4 at a position where the mounting hole 801 is opposite to the lower pressing head 3, i.e. the center line of the mounting hole 801 is coincident with the center line of the lower connecting groove of the lower pressing head 3, when the column type elastic body 2 penetrates through the mounting hole 801, the verticality of the column type elastic body 2 after being mounted is ensured, the effect of "centering" is realized, and when weighing is performed based on the verticality setting, the limiting effect of the outer wall of the mounting hole 801 can keep the column type elastic body 2, and the column type elastic body 2 can be compressed in the vertical direction after being pressed, avoid the slope after being pressed, so has both guaranteed the accuracy of weighing result, also can prevent the column type elastomer 2 from taking place structural damage, influence the life of whole sensor, it should be mentioned, the concrete shape of the protective housing 8 is not specially limited, only need can form good protection to the column type elastomer 2, the protective housing 8 of the utility model mainly comprises two parts, namely the cover body part located on the upper portion and the support foot part located on the lower portion, wherein, the cover body is a hollow structure with open-ended lower end, the mounting hole 801 is opened on the top of the cover body, the cover body part surrounds the periphery of the column type elastomer 2 to form protection to the foil gage and cable in the column type elastomer 2, prevent rain, snow, dust from entering, simultaneously, reduce the impact force that receives, the support foot is used for fixing with the bottom plate 4 of weighing, the support foot can be configured as required to be a plurality ofly, the number of the legs is increased to improve the stability of the fixed protective cover 8.

As shown in fig. 2, fig. 3 and fig. 6, dustproof protection module still includes protection inner cover 9, protection inner cover 9 is the annular, protection inner cover 9 is in column type elastomer 2 through its inner ring section suit, and protection inner cover 9 inlays and locates between column type elastomer 2 and mounting hole 801, and with the two interference fit, based on the aforesaid setting, through the seal effect of protection inner cover 9, prevent sleet, the dust is from the clearance position entering between protection outer cover 8 and the column type elastomer 2, and then prevent to cause the interference to the strainometer in the column type elastomer 2, the easy bad problem of contact has been solved.

As shown in fig. 1 to 3, 5 and 6, the dustproof protection module further includes a protection inner cover 10, the protection inner cover 10 is annular, the protection inner cover is sleeved on the column-type elastic body 2 through an inner ring section of the protection inner cover and is buckled on the upper end of the lower pressure head 3, and the inner edge of the protection inner cover is in interference fit with the lower pressure head 3 and the column-type elastic body 2, so that rain, snow and dust are prevented from entering from a gap between the lower pressure head 3 and the column-type elastic body 2, the column-type elastic body 2 is further protected, and the column-type elastic body 2 can be limited to deflect relative to the lower pressure head 3 through interference fit, and abrasion of a contact position of the column-type elastic body 2 and the lower pressure head 3 is prevented.

As shown in fig. 1 and 7, a connection port 802 for passing the cable of the column type elastic body 2 is formed on the protective outer cover 8, a protective rubber ring 11 is embedded in the connection port 802, the cable of the column type elastic body 2 passes through the rubber ring and extends outwards, and the cable of the column type elastic body 2 can be protected by the protective rubber ring 11.

Further, the shape of going up 1 vertical projection face of pressure head is arbitrary shape to satisfy customer's apolegamy demand better, can be customized into arbitrary shape according to customer's demand when the pressure head 1 is gone up in the election again, the utility model discloses well chooseing for use the vertical projection face to be circular shape goes up pressure head 1.

As shown in fig. 2, the lower end of the shield case 8 is fixed to the weighing baseplate 4 by high-strength bolts 12 or by welding.

As shown in fig. 1 and 2, the weighing bottom plate 4 is provided with a horizontal bubble 13, the horizontal bubble 13 is used for testing whether the sensor body is kept horizontal, and since the sensor body is arranged on the weighing bottom plate 4, the weighing sensor can be kept horizontal when the weighing bottom plate 4 is kept horizontal, and particularly, when the bubble in the horizontal bubble 13 is at the central position, the weighing bottom plate 4 and the sensor body are kept at the horizontal position.

Referring to fig. 1 to 7, in the column type weighing sensor of the present invention, the upper pressure head 1 and the column type elastic body 2 of the sensor body are fixed by the push rod 5 of the radially disposed self-locking module, when the push rod 5 penetrates through the first positioning hole 201 of the column type elastic body 2 and the second positioning hole 101 of the upper pressure head 1, the relative rotation of the upper pressure head 1 and the column type elastic body 2 can be limited, thereby ensuring the stability during weighing, and making the weighing result more accurate, rain, snow, dust, etc. can be prevented from entering the column type elastic body 2 by the protective outer cover 8, the protective inner cover 9 and the protective inner cover 10 of the dustproof protective module, and the problem of easy contact failure of the strain gauge is solved, meanwhile, the protective outer cover 8 can also form good protection for the column type elastic body 2, and reduce the influence of external impact on the column type elastic body 2, the protective outer cover 8 and the weighing bottom plate 4 are connected by the high-strength bolt 12 or welding, guaranteed the stability of protection dustcoat 8, and simultaneously, the fixed back of protection dustcoat 8 installation, because its mounting hole 801 is relative with lower pressure head 3, so can guarantee the straightness that hangs down of column type elastomer 2, and prevent that it from empting, protection inner cup 10 can also restrict column type elastomer 2 and 3 intervals relative rotations down, before weighing, through the levelness of calibration bottom plate 4 and whole sensor body that horizontal bubble 13 can be quick, make the weighing result more accurate, can use bolted connection roof of weighing on last pressure head 1 simultaneously, increase the contact surface when weighing the object, it is more stable when making to put.

The foregoing embodiments and description have been provided to illustrate the principles and preferred embodiments of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed.

Claims

1. The utility model provides a modular column type weighing sensor, it includes the sensor body, the sensor body includes last pressure head (1), column type elastomer (2) and lower pressure head (3) that top-down set gradually, pressure head (3) are located down and are weighed on bottom plate (4), its characterized in that, column type elastomer (2) with it is fixed radially to dismantle through from the mode locking piece to go up pressure head (1), column type elastomer (2) overcoat is equipped with dustproof protection module.

2. The modular pillar load cell of claim 1, the column type elastic body (2) and the upper pressure head (1) are respectively provided with a first positioning hole (201) and a second positioning hole (102) along the radial direction, the self-locking module comprises a push rod (5), a threaded sleeve (6) and a spring (7), the threaded sleeve (6) is arranged in the second positioning hole (102), and the inner pipe section is provided with opposite fixed plates (601), two through holes (601a) are arranged on the two fixed plates (601), the push rod (5) is inserted in the threaded sleeve (6), one end of the push rod (5) penetrates through the two through holes (601a) to extend outwards, a convex block (501) is formed on the part of the outer wall of the push rod (5) positioned between the two fixing plates (601), the spring (7) is sleeved between the lug (501) and the fixing plate (601) close to one side of the large-inner-diameter section.

3. The modular column type weighing sensor of claim 2, wherein the outer wall of the push rod (5) is further provided with at least one limiting plate (502), one end of the threaded sleeve (6) departing from the upper pressure head (1) is provided with limiting grooves (602) corresponding to the limiting plates (502) one by one, and the limiting plates (502) are inserted into the corresponding limiting grooves (602).

4. The modular column type weighing sensor of claim 1, wherein the dustproof protection module comprises a protection outer cover (8), the lower end of the protection outer cover (8) is fixed with the weighing bottom plate (4), the upper end of the protection outer cover is provided with a mounting hole (801) opposite to the lower pressure head (3), and the column type elastic body (2) penetrates through the mounting hole (801).

5. The modular column type weighing sensor of claim 4, wherein the dustproof protection module further comprises an inner protection cover (9), the inner protection cover (9) is annular, is sleeved on the column type elastic body (2), is embedded between the column type elastic body (2) and the mounting hole (801), and is in interference fit with the column type elastic body and the mounting hole.

6. A modular column weighing sensor according to claim 4 or 5, characterized in that the dustproof protection module further comprises a protective inner cover (10), the protective inner cover (10) is annular, is sleeved on the column elastomer (2) and is buckled at the upper end of the lower pressure head (3), and the inner edge of the protective inner cover is in interference fit with the lower pressure head (3) and the column elastomer.

7. A modular pillar type weighing sensor according to claim 4, characterized in that the protective cover (8) is formed with a wire connection port (802) for passing the cable of the pillar type elastic body (2), the wire connection port (802) is embedded with a protective rubber ring (11), and the cable of the pillar type elastic body (2) passes through the protective rubber ring (11) and extends outwards.

8. A modular pillar load cell according to claim 4, characterized in that the shape of the vertical projection of the upper ram (1) is arbitrary.

9. A modular column weighing sensor according to claim 4, characterised in that the lower end of the protective cover (8) is fixed to the weighing baseplate (4) by means of high-strength bolts (12) or by welding.

10. A modular column load cell according to claim 1, characterised in that the load floor (4) is provided with a level bubble (13).