Unbalance load sensor

Abstract

The invention discloses an unbalance loading sensor which comprises a supporting seat and an elastic body arranged on the supporting seat, a strain gauge is arranged on the elastic body, the unbalance loading sensor further comprises a supporting piece, the supporting piece is movably arranged on the supporting seat, and the supporting piece penetrates through the elastic body; a conductive plate, wherein the conductive plate is deformable; the spring is arranged between the conduction plate and the supporting piece; the pressing head is arranged outside the supporting piece, and the pressing head is in contact with the elastic body; the connecting seat is movably arranged on the supporting piece; the adjusting assembly is used for adjusting the position of the connecting seat; according to the invention, the accuracy of a measurement result can be ensured, and different use requirements can be met.

Description

Technical Field

[0001] The invention relates to the technical field of sensors, and in particular to an eccentric load sensor. Background Art

[0002] In the load balancing detection of cargo lifting, containerized cargo stacking and large-scale mechanical equipment, unbalanced loading is often encountered; unbalanced loading can easily lead to rollover, thus causing serious safety problems; however, existing sensors are usually based on the measurement of the overall load. When the uneven load causes uneven force, it is often difficult to accurately measure the load condition. Summary of the invention

[0003] The object of the present invention is to provide an eccentric load sensor which can effectively ensure the accuracy of the measurement result and can meet different usage requirements.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: an eccentric load sensor, comprising a support seat and an elastic body arranged on the support seat, a strain gauge is arranged on the elastic body, and also comprises: a support member, the support member is movably arranged on the support seat, and the support member passes through the elastic body; a conductive plate, the conductive plate is deformable; a spring, the spring is arranged between the conductive plate and the support member; a pressure head, the pressure head is arranged outside the support member, and the pressure head is in contact with the elastic body; a connecting seat, the connecting seat is movably arranged on the support member; an adjustment component, the adjustment component is used to adjust the position of the connecting seat; a conductive rod, the conductive rod has a plurality of conductive rods, and the plurality of conductive rods are arranged in a circular array; the top end of each conductive rod is rotatably arranged on the connecting seat through a rotating shaft, and the bottom end of each conductive rod is in contact with the pressure head; a squeezing ball, the number of the squeezing balls is equal to that of the conductive rods and the positions are corresponding, each of the squeezing balls is arranged on the conductive plate, and each of the squeezing balls abuts against the corresponding conductive rod.

[0005] Furthermore, the support member includes: a support column, which penetrates the elastomer and corresponds to the position of the spring; a guide column, which is arranged at the bottom end of the support column and is movably arranged on the support seat; wherein the connecting seat is movably arranged on the support column, the pressure head is fixedly sleeved on the outside of the support column, and the plurality of extrusion balls are evenly distributed along the circumference of the axis of the support column.

[0006] Furthermore, the support member also includes a blocking piece, which is arranged at the top end of the support column, and the spring is arranged between the blocking piece and the conductive plate.

[0007] Furthermore, the adjustment assembly includes: a threaded sleeve, which is threadedly fitted on the outside of the support column; wherein a threaded structure adapted to the threaded sleeve is provided on the support column, and the connecting seat is in contact with the threaded sleeve.

[0008] Furthermore, the support column is provided with two slide grooves, and the connecting seat is provided with two protrusions, and the two protrusions are respectively arranged in the two slide grooves.

[0009] Furthermore, the pressure head includes: a supporting part, one end of each of the conductive rods away from the connecting seat abuts against the supporting part; an extrusion part, the extrusion part is connected to the supporting part, and the extrusion part is in contact with the elastomer; wherein the support column penetrates the supporting part and the extrusion part.

[0010] Furthermore, a guide slide cylinder is arranged on the support seat, and the guide column is cooperatively arranged in the guide slide cylinder.

[0011] Furthermore, the elastic body is provided with a through hole, and the support column passes through the through hole.

[0012] Compared with the prior art, the beneficial effects achieved by the present invention are as follows.

[0013] 1. The conductive plate of the present invention is deformable, and the conductive rod is squeezed by the squeezing ball corresponding to the deformation area of ​​the conductive plate to achieve deformation of the elastic body, so that the load measurement result is more accurate, thereby effectively reducing or avoiding the occurrence of overloading.

[0014] 2. The position of the connecting seat is adjustable. According to the degree of deformation of the bearing component, the connecting seat can be located at a suitable position to meet different usage needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0016] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present invention.

[0017] Figure 2 It is a schematic diagram of the overall structure of embodiment 1 of the present invention from another angle.

[0018] Figure 3 It is a schematic diagram of the state where the support member of the first embodiment of the present invention passes through the elastic body.

[0019] Figure 4 It is a schematic diagram of the cooperation of the extrusion ball, the conduction rod and the pressure head in the first embodiment of the present invention.

[0020] Figure 5 It is a schematic diagram of the cooperation between the connecting base and the supporting column of the second embodiment of the present invention.

[0021] Figure 6 It is a schematic diagram of the connecting socket structure of the second embodiment of the present invention.

[0022] Figure 7 It is a schematic diagram of the installation of the guide slide cylinder of the third embodiment of the present invention.

[0023] In the figure: 1. support seat; 11. guide slide; 2. elastic body; 21. strain gauge; 22. through hole; 3. support member; 31. support column; 311. slide groove; 32. baffle; 33. guide column; 4. conduction plate; 41. extrusion ball; 42. spring; 5. pressure head; 51. support part; 52. extrusion part; 6. adjustment component; 61. threaded sleeve; 7. conduction rod; 8. connecting seat; 81. protrusion. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Embodiment 1

[0026] See also Figure 1-Figure 4 The present invention provides a technical solution: an eccentric load sensor, including a support seat 1 and a conductive plate 4, the conductive plate 4 is deformable, the conductive plate 4 is used to be fixedly connected to a bearing member for bearing a container, and the bearing member for bearing the container also adopts an elastic member, so that it can be deformed; a support member 3 is movably arranged on the support seat 1, and a spring 42 is connected between the support member 3 and the conductive plate 4; specifically, the conductive plate 4 can be made of metal materials or composite materials, so that it has good load-bearing capacity and elasticity.

[0027] An elastic body 2 is arranged on the support seat 1, and a strain gauge 21 is pasted on the elastic body 2. When the elastic body 2 is deformed, the strain gauge 21 pasted on the elastic body 2 is also deformed, thereby causing a change in resistance. The resistance change can be converted into a voltage signal output through a Wheatstone bridge. This is a prior art and will not be described in detail.

[0028] A pressure head 5 is fixedly arranged outside the support member 3, and the bottom end of the pressure head 5 contacts the top surface of the elastic body 2; in addition, a connecting seat 8 is movably arranged on the support member 3, and a plurality of conducting rods 7 are movably arranged on the connecting seat 8; specifically, Figure 5As shown, there are six conduction rods 7, which are arranged in a circular array; the top end of each conduction rod 7 is rotatably set on the connecting seat 8 through a rotating shaft, and the bottom end of each conduction rod 7 is set to a round head structure.

[0029] Six extrusion balls 41 are fixedly connected to the bottom of the conductive plate 4. The entire conductive plate 4 can be made of a material with good elasticity, such as copper or polyethylene, and the six extrusion balls 41 are arranged in a one-to-one correspondence with the six conductive rods 7.

[0030] An adjustment component 6 is provided on the support member 3, and the adjustment component 6 is used to adjust the position of the connecting seat 8; at the same time, the six extrusion balls 41 respectively abut the corresponding conduction rods 7, so that the bottom end of the conduction rod 7 abuts the pressure head 5, and the adjustment component 6 abuts the same position of each conduction rod 7.

[0031] The support member 3 includes a support column 31, which is vertically arranged and the connecting seat 8 is movably arranged on the support column 31; a baffle 32 is arranged at the top of the support column 31, and a spring 42 is connected between the baffle 32 and the conductive plate 4; a guide column 33 is coaxially arranged at the bottom end of the support column 31, and the guide column 33 is movably arranged on the support seat 1; in addition, the adjustment component 6 is cooperatively arranged on the outside of the support column 31, the pressure head 5 is fixed on the outside of the support column 31, and the support column 31 penetrates the elastomer 2; specifically, a through hole 22 is penetrated on the elastomer 2, and the support column 31 passes through the through hole 22.

[0032] The adjustment assembly 6 includes a threaded sleeve 61, which is threadedly fitted on the outside of the support column 31; specifically, a threaded structure adapted to the threaded sleeve 61 is provided on the upper part of the support column 31, and the threaded sleeve 61 is threadedly fitted on the outside of the threaded structure, and the bottom of the connecting seat 8 is in contact with the top of the threaded sleeve 61.

[0033] The pressure head 5 is composed of a supporting part 51 and an extruding part 52, the bottom end of each conductive rod 7 abuts against the top of the supporting part 51, and the bottom of the extruding part 52 abuts against the elastomer 2; the support column 31 penetrates the supporting part 51 and the extruding part 52, and the support column 31 is fixedly connected to the supporting part 51 and the extruding part 52; the supporting part 51 is a disc structure, and two notches are provided on the supporting part 51, and the threaded sleeve 61 is conveniently adjusted through the notches; the extruding part 52 is a truncated cone structure, the extruding part 52 is coaxial with the support column 31, and the large end of the extruding part 52 faces upward and the small end faces downward.

[0034] In this embodiment, the conductive plate 4 is used to be fixedly connected to a bearing member for bearing containers (in this case, no container is placed on the bearing member, and the bearing member can be movably arranged on a transport device such as a transport vehicle), and the bearing member for bearing containers also adopts an elastic member, so that both the conductive plate 4 and the bearing member can be deformed; according to the degree of deformation of the bearing member, the threaded sleeve 61 is adjusted to a suitable position; specifically, since the connecting seat 8 is movably arranged on the supporting column 31, and the top of the threaded sleeve 61 contacts the bottom of the connecting seat 8, by adjusting the threaded sleeve 61 on the supporting column 31 By adjusting the position of the connecting seat 8, the position adjustment of the connecting seat 8 can be achieved; relying on the effect of gravity, the bottom end of the conduction rod 7 contacts with the support portion 51, and the closer the connecting seat 8 is to the baffle 32, the greater the inclination angle of the conduction rod 7 (that is, the greater the angle between the conduction rod 7 and the horizontal direction); at the same time, by installing the support seat 1 at a suitable position (the support seat 1 is specifically installed on a transport vehicle or other related transport equipment), each squeezing ball 41 is respectively in contact with the corresponding conduction rod 7; through the above-mentioned arrangement, the installation and fixation of the entire sensor can be completed, and of course, a plurality of such sensors can be evenly distributed on the carrier.

[0035] After the entire sensor is installed and fixed, when stacking containers on the carrier, when the containers are stacked neatly, the carrier is in a flat state as a whole, and the carrier presses down the conductive plate 4. At this time, the conductive plate 4 moves downward as a whole, and each squeezing ball 41 squeezes the corresponding conductive rod 7, thereby squeezing the pressure head 5, and further causing the elastic body 2 to deform, thereby realizing load measurement; when the containers are not stacked neatly, the gravity distribution is uneven, thereby causing the corresponding local deformation of the carrier, the deformation of the carrier, and the deformation of the conductive plate 4 at the corresponding position. The deformation of the conductive plate 4 will cause the squeezing ball 41 in the deformation area of ​​the conductive plate 4 to deflect, and the squeezing ball 41 squeezes the corresponding conductive rod 7, and further causes the pressure head 5 to press down the elastic body 2. Since the squeezing ball 41 corresponding to the deformation area of ​​the conductive plate 4 squeezes the corresponding conductive rod 7 to achieve the downward pressing of the elastic body 2, and since the conductive plate 4 is connected to the carrier, the squeezing ball 41 corresponding to the deformation area is lower than other squeezing balls 41, thereby making the load measurement result more accurate.

[0036] As the connection seat 8 is closer to the baffle 32, the inclination angle of the conduction rod 7 is larger; when the containers are not neatly stacked, resulting in uneven gravity distribution, when the inclination angle of the conduction rod 7 is larger and the extrusion ball 41 corresponding to the deformation area of ​​the conduction plate 4 squeezes the conduction rod 7, the distance that the pressure head 5 moves down is different, thereby causing different deformation amounts of the elastic body 2; therefore, according to the difficulty of deformation of the bearing member, the connection seat 8 is located at a suitable position, that is, when the bearing member is difficult to deform, the distance that the pressure head 5 moves down is increased, and when the bearing member is easy to deform, the distance that the pressure head 5 moves down is reduced, so that different usage needs can be met.

[0037] Embodiment 2

[0038] See also Figure 5 and Figure 6 This embodiment is based on the first embodiment, and two slide grooves 311 are provided on the support column 31. The two slide grooves 311 are provided along the length direction of the support column 31, and each slide groove 311 penetrates the outer ring surface of the support column 31; the connecting seat 8 is sleeved on the outside of the support column 31, and two protrusions 81 are integrally formed on the connecting seat 8, and the two protrusions 81 are respectively arranged in the two slide grooves 311; through the cooperation between the protrusions 81 and the slide grooves 311, the stability of the movement of the connecting seat 8 is improved, and the deflection of the connecting seat 8 is avoided.

[0039] Embodiment 3

[0040] See also Figure 1 and Figure 7 This embodiment is based on the second embodiment, and a guide slide 11 is fixedly provided on the support seat 1, and the guide column 33 cooperates with the guide slide 11; that is, the guide column 33 cooperates with the guide slide 11, so that the entire support member 3 can move up and down stably.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An eccentric load sensor, comprising a support base (1) and an elastic body (2) arranged on the support base (1), wherein a strain gauge (21) is arranged on the elastic body (2), characterized in that: Also includes: A support member (3), wherein the support member (3) is movably arranged on the support seat (1), and the support member (3) passes through the elastic body (2); A conductive plate (4), wherein the conductive plate (4) is deformable; a spring (42), wherein the spring (42) is arranged between the conductive plate (4) and the support member (3); A pressure head (5), the pressure head (5) is arranged outside the support member (3), and the pressure head (5) is in contact with the elastic body (2); A connecting seat (8), wherein the connecting seat (8) is movably arranged on the supporting member (3); An adjusting component (6), wherein the adjusting component (6) is used to adjust the position of the connecting seat (8); A conduction rod (7), wherein the conduction rod (7) has a plurality of conduction rods (7) arranged in a circular array; the top end of each conduction rod (7) is rotatably disposed on the connection seat (8) via a rotating shaft, and the bottom end of each conduction rod (7) is in contact with the pressure head (5); Squeezing balls (41), the number of the squeezing balls (41) and the conducting rods (7) are equal and the positions are corresponding, each of the squeezing balls (41) is arranged on the conducting plate (4), and each of the squeezing balls (41) abuts against the corresponding conducting rod (7).

2. The eccentric load sensor according to claim 1, characterized in that: The support member (3) comprises: A support column (31), wherein the support column (31) penetrates the elastic body (2), and the position of the support column (31) corresponds to that of the spring (42); A guide column (33), wherein the guide column (33) is arranged at the bottom end of the support column (31), and the guide column (33) is movably arranged on the support seat (1); The connecting seat (8) is movably arranged on the supporting column (31), the pressing head (5) is fixedly sleeved outside the supporting column (31), and a plurality of squeezing balls (41) are evenly distributed along the circumference of the axis of the supporting column (31).

3. The eccentric load sensor according to claim 2, characterized in that: The support member (3) further comprises a baffle (32), wherein the baffle (32) is arranged at the top end of the support column (31), and the spring (42) is arranged between the baffle (32) and the conductive plate (4).

4. The eccentric load sensor according to claim 2, characterized in that: The regulating component (6) comprises: A threaded sleeve (61), wherein the threaded sleeve (61) is threadably fitted on the outside of the support column (31); Wherein, the support column (31) is provided with a threaded structure adapted to the threaded sleeve (61), and the connecting seat (8) is in contact with the threaded sleeve (61).

5. The eccentric load sensor according to claim 2, characterized in that: The support column (31) is provided with two slide grooves (311), and the connecting seat (8) is provided with two protrusions (81), and the two protrusions (81) are respectively arranged in the two slide grooves (311).

6. The eccentric load sensor according to claim 2, characterized in that: The pressure head (5) comprises: A support portion (51), wherein one end of each of the conducting rods (7) away from the connecting seat (8) abuts against the support portion (51); an extrusion portion (52), the extrusion portion (52) being connected to the support portion (51), and the extrusion portion (52) being in contact with the elastic body (2); Wherein, the support column (31) penetrates the support portion (51) and the extrusion portion (52).

7. The eccentric load sensor according to claim 2, characterized in that: The support seat (1) is provided with a guide slide cylinder (11), and the guide column (33) is cooperatively arranged in the guide slide cylinder (11).

8. The eccentric load sensor according to claim 2, characterized in that: The elastic body (2) is provided with a through hole (22), and the support column (31) passes through the through hole (22).

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