Multi-column combined column type sensor

Abstract

The invention relates to the field of pressure sensors, in particular to a multi-column combined column type sensor which comprises a pressure head and a base, a plurality of elastic bodies are arranged between the pressure head and the base, the elastic bodies are rotary bodies, and each elastic body is provided with a top and a tail. The bearing pressing head abuts against the end, away from the base, of the pressing head, a shell is connected to the outer side face of the pressing head and the outer side face of the base, the top of the elastic body is detachably connected with the pressing head, and the tail of the elastic body is detachably connected with the base. The elastic body in the pin is processed and manufactured independently of the whole column type sensor, azimuth angle error compensation can be independently carried out, the precision of the middle body of the column type sensor is greatly improved, the elastic body can be detached and replaced, and the manufacturing cost is low.

Description

Technical Field

[0001] The invention relates to the field of pressure sensors, and in particular to a columnar sensor composed of multiple columns. Background Art

[0002] A column sensor is a measuring element that measures mass or weight by detecting the deformation of an object under force. Column sensors are widely used in force measurement and weighing operations in various industries due to their simple structure, easy processing and high cost performance. The height-to-diameter ratio of a column sensor, that is, the ratio of height to diameter, is an important design parameter of a column sensor. A suitable height-to-diameter ratio can make the column sensor have high accuracy. In the prior art, column sensors with a large range and a single-column structure are large in size, and the heat treatment process in the manufacturing process is complicated, and it is difficult to ensure the consistency of the heat treatment effect.

[0003] To solve the above problems, a Chinese patent with publication number CN102607676A discloses a multi-column compressive force sensor, including an elastic body, a force-transmitting steel ball, a bearing pressure head, and a circular notch between the elastic body and the bearing pressure head for assembling the force-transmitting steel ball. The columnar elastic body is an integral component, and multiple identical pillars are arranged in the middle strain zone. The cross-sectional shape of the pillar is a regular polygon or a circle, and the ratio of the diameter of the cross-sectional circumscribed circle of the pillar to the height of the pillar is 1:0.8 to 1:3.5; the ratio of the radius of the steel ball to the radius of the circular notch is 1 / 3 to 1 / 1.1. The above invention patent designs a columnar sensor of a single elastic body as a columnar sensor of multiple elastic bodies, which reduces the overall length of the columnar sensor and improves the test accuracy. However, the columnar sensor in the above invention is an integrated structure, and its single elastic body cannot perform test compensation for azimuth error, resulting in a large azimuth error of the overall sensor, and the manufacturing and processing costs of multiple elastic bodies are high, and a single elastic body cannot be repaired or replaced after damage. Summary of the invention

[0004] In view of the problems in the prior art that the azimuth error of the multi-column sensor is large, a single elastic body cannot be replaced or repaired after being damaged, and the overall manufacturing cost is high, the present invention proposes: A columnar sensor with multiple columns, characterized in that it includes a pressure head and a base, a plurality of elastic bodies are arranged between the pressure head and the base, the elastic body is a rotating body, the elastic body has a top and a tail, and also includes a bearing pressure head abutting against one end of the pressure head away from the base, the pressure head and the outer side surfaces of the base are connected with a shell, the top of the elastic body is detachably connected to the pressure head, and the tail of the elastic body is detachably connected to the base.

[0005] The present invention proposes a column sensor with a detachable elastomer, in which several elastomers between a pressure head and a base can be detachably connected by bolts, which is beneficial to the overall processing and manufacturing of the column sensor; during the processing of the elastomer, the azimuth error of the elastomer can be compensated individually, thereby improving the overall measurement accuracy of the column sensor.

[0006] The pressure head includes a bearing top surface and an inlay bottom surface. The bearing top surface is a spherical structure. The inlay bottom surface is provided with a plurality of bottom surface embedded grooves corresponding to the number of elastic bodies. The bottom surface embedded grooves match the top of the elastic body. The top of the elastic body is installed in the bottom surface embedded groove. The spherical structure of the bearing top surface is conducive to the measurement of a large range.

[0007] The base comprises a bottom surface, an inlaid top surface arranged opposite to the bottom surface, a plurality of top surface inlaid grooves arranged on the inlaid top surface, the top surface inlaid grooves corresponding to the bottom surface inlaid grooves, the top surface inlaid grooves matching the tail of the elastic body, and the tail of the elastic body being installed in the top surface inlaid grooves.

[0008] The top of the elastic body is provided with a top fixing hole, the tail of the elastic body is provided with a tail fixing hole, the bottom surface embedded groove is provided with a fixing hole, the top surface embedded groove is provided with a through hole, the top fixing hole and the fixing hole are connected by a tooth bar, and the tail fixing hole and the through hole are connected by a bolt. The top of the elastic body is detachably connected to the bottom surface embedded groove by the tooth bar, and the bottom of the elastic body is detachably connected to the top surface embedded groove by the bolt.

[0009] A plurality of strain gauges are arranged on the side between the head and the tail of the elastic body, and the strain gauges are evenly distributed in the circumferential direction of the side of the elastic body. The strain gauges are used to measure the deformation of the elastic body caused by pressure, and the strain gauges are preferably arranged in 4n (n is a positive integer).

[0010] The height-to-diameter ratio of the elastic body ranges from H / D = 2 to 4. The height-to-diameter ratio of the elastic body preferably ranges from H / D = 2.5 to 3.5.

[0011] The bearing pressure head has a bearing surface and a bearing bottom surface arranged opposite to the bearing surface, the bearing bottom surface is a spherical structure, the bearing bottom surface abuts against the bearing top surface, and the curvature radius of the bearing bottom surface is greater than the curvature radius of the bearing top surface. The spherical surface cooperation of the bearing top surface and the bearing bottom surface can withstand a large range of measurement while coping with certain axial shear and torsion.

[0012] The bearing pressure head is provided with a sealing ring installation groove, a sealing ring is provided between the bearing pressure head and the pressure head, and the sealing ring is arranged in the sealing ring installation groove.

[0013] The outer side surface of the pressure head near one end of the base is provided with a first connection groove, the outer side surface of the base near one end of the pressure head is provided with a second connection groove, the housing is sleeved in the first connection groove and the second connection groove, the second connection groove is provided with a housing fixing hole, and the housing is provided with a housing through hole. The housing is sleeved in the first connection groove and the second connection groove, and is connected to the second connection groove with bolts or screws.

[0014] The outer side surface of the pressure head is provided with a plurality of handle mounting holes.

[0015] The beneficial effects of the present invention are: 1. The azimuth error compensation is performed on multiple elastic bodies in the column sensor separately to improve the overall accuracy of the column sensor; 2. The elastomer is simple to manufacture and has low cost. Compared with the manufacturing method of one-piece elastomer, the cost is greatly reduced; 3. A single damaged elastomer in the column sensor can be removed and replaced to reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of a columnar sensor composed of multiple columns.

[0017] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0018] Figure 3 This is a schematic diagram of the structure of the column sensor with multiple columns in the first embodiment.

[0019] Figure 4 It is a schematic cross-sectional view of the columnar sensor with multiple columns in the first embodiment.

[0020] Figure 5 It is a schematic cross-sectional view of a columnar sensor with multiple columns in the second embodiment.

[0021] Figure 6 This is a schematic diagram of the overall structure of the column sensor with multiple columns in Example 3.

[0022] Figure Number: 1. Pressure head; 2. Base; 3. Elastic body; 4. Load-bearing pressure head; 5. Shell; 6. Strain gauge; 7. Threaded rod; 11. Load-bearing top surface; 12. Inlaid bottom surface; 13. Bottom surface embedded groove; 14. Fixing hole; 15. First installation groove; 21. Bottom surface; 22. Inlaid top surface; 23. Top surface embedded groove; 24. Base through hole; 25. Second installation groove; 26. Shell fixing hole; 27. Handle mounting hole; 31. Top; 32. Tail; 33. Top fixing hole; 34. Tail fixing hole; 41. Load-bearing surface; 42. Load-bearing bottom surface; 43. Sealing ring mounting groove; 44. Sealing ring; 51. Shell through hole. DETAILED DESCRIPTION

[0023] The following content describes the present disclosure in detail. The following paragraphs define different aspects of the embodiments in more detail. The defined aspects may be combined with any other aspect or aspects, unless it is explicitly emphasized that the incombinable parts are present.

[0024] The terms "first", "second", etc. that appear in the present disclosure are only for the convenience of description to distinguish different components with the same name, and do not indicate a sequence or a primary and secondary relationship.

[0025] In the description of the present invention, it is necessary to understand that the terms "inside", "outside", "upper" and "lower" etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention, rather than indicating or implying that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0026] Embodiment 1 like Figure 1 As shown, a columnar sensor of a multi-column combination includes a pressure head 1 and a base 2, four elastomers 3 are connected between the pressure head 1 and the base 2, a bearing pressure head 4 is connected to the end of the pressure head 1 away from the base 2, the bearing pressure head 4 is in contact with the pressure head 1, a shell 5 is sleeved between the pressure head 1 and the base 2, and the elastomer 3 and the pressure head 1, as well as the elastomer 3 and the base 2 are detachably connected.

[0027] like Figure 2 As shown, the elastic body 3 is a cylinder, and the elastic body 3 includes a top 31 and a tail 32. Four strain gauges 6 are arranged on the side between the top 31 and the tail 32 of each elastic body 3, and the strain gauges 6 are evenly arranged in the axial direction; the top 31 of the elastic body 3 is provided with a top fixing hole 33, and the tail 32 of the elastic body 3 is provided with a tail fixing hole 34, and the top fixing hole 33 and the tail fixing hole 34 are both centrally provided as screw holes; the pressure head 1 and the base 2 are both rotating bodies; as shown Figure 4As shown, the base 2 has an inlaid top surface 22, and four top surface embedded grooves 23 are arranged on the inlaid top surface 22, and the four top surface embedded grooves 23 are evenly distributed on the inlaid top surface 22 in a cross shape; the shape of the top surface embedded groove 23 is set corresponding to the tail 32 of the elastic body 3, and the tail 32 of the elastic body 3 is transitionally matched with the top surface embedded groove 23, and a base through hole 24 is opened on the top surface embedded groove 23, and the base through hole 24 passes through the base 2; the four base through holes 24 on the top 31 embedded groove are penetrated by hexagonal bolts and are respectively connected with the four elastic body 3 fixing holes 14 on the tail 32 of the elastic body 3; the pressure head 1 includes The bearing top 31 and the embedded bottom surface 13, the bearing top surface 11 is a spherical structure, which is connected to the bearing pressure head 4; the embedded bottom surface 13 is a plane, and the embedded bottom surface 13 is provided with 4 bottom surface embedded grooves 13, which are arranged corresponding to the top surface embedded groove 23; the bottom surface embedded groove 13 is provided with a fixing hole 14, which is a screw hole and is opened in the center; the shape of the bottom surface embedded groove 13 is arranged corresponding to the top 31 of the elastomer 3, and the top 31 of the elastomer 3 is transitionally matched with the bottom surface embedded groove 13; the four elastomers 3 are respectively threadedly connected with the fixing holes 14 of the four bottom surface embedded grooves 13 through the toothed rods 7.

[0028] The shell 5 is cylindrical and serves as the shell 5 of the column sensor, which is used to isolate the elastomer 3 between the pressure head 1 and the base 2 from contact with the outside world. A first connecting groove is provided on the outer side surface of the pressure head 1 near the base 2, and a second connecting groove is provided on the outer side surface of the base 2 near the pressure head 1. The shell 5 is sleeved in the first connecting groove and the second connecting groove; a shell fixing hole 26 is provided on the second connecting groove, and a shell through hole 51 is provided on the end of the shell 5 that is sleeved with the second connecting groove. During installation, a screw is passed through this shell through hole 51 to threadably connect with the shell fixing hole 26 on the second connecting groove.

[0029] like Figure 2 and Figure 3As shown, the bearing pressure head 4 is a rotating body, including a bearing surface 41 for contacting other equipment or objects, and a bearing bottom surface 42 abutting against the bearing top surface 11 of the pressure head 1. The bearing bottom surface 42 is a spherical structure, and the curvature radius of the bearing bottom surface 42 is slightly smaller than the curvature radius of the bearing top surface 11. When the bearing bottom surface 42 and the bearing top surface 11 are in normal contact, there is a narrow gap at the edge between the bearing top surface 11 and the bearing bottom surface 42, which can enable the columnar sensor to cope with certain axial shear in a large load test environment; the bearing surface 41 of the bearing pressure head 4 is flat, and the bearing surface 41 is located at one end The outer diameter is slightly larger than the outer diameter of the end where the bearing bottom surface 42 is located; a sealing ring mounting groove 43 is also provided at one end of the bearing bottom surface 42, and a screw hole is provided on the sealing ring mounting groove 43. A sealing ring 44 is provided in the sealing ring mounting groove 43, and the sealing ring 44 is an elastic sealing ring 44. The sealing ring 44 is located between the side surface of the end where the bearing top surface 11 of the pressure head 1 is located and the sealing ring mounting groove 43, and the sealing ring 44 is fixed with screws through the screw holes on the sealing ring mounting groove 43; four handle mounting holes 27 are provided on the side of the pressure head 1, and the four handle mounting holes 27 are evenly distributed along the side of the pressure head 1.

[0030] The manufacturing and assembly method and steps of the multi-column combined column sensor in this embodiment are as follows: The processing of the elastic body 3 mainly adopts turning processing, which has high production efficiency. The height-to-diameter ratio of the elastic body 3 is in the range, that is, H / D=2.5~3.5; the top fixing hole 33 is processed at the top 31 of the elastic body 3, and the tail fixing hole 34 is processed at the tail 32; 4n strain gauges 6 (n is a positive integer) are evenly distributed on the side of the elastic body 3, and 4 are used in this embodiment, all on the same circumferential horizontal plane of the elastic body 3; after each elastomer 3 is manufactured, a Wheatstone bridge is assembled separately for each elastomer 3, and a single elastomer 3 is called a semi-finished sensor and its sensitivity is guaranteed. The input and output resistance parameters are consistent. This process is equivalent to correcting the azimuth error for each elastomer 3, reducing the influence of the load force point, and never significantly reducing the azimuth error of the sensor; after the azimuth error of a single elastomer 3 is corrected, the top fixing hole 33 of each elastomer 3 is screwed with a tooth bar 7 respectively, and each assembled elastomer 3 is connected to the bottom surface embedded groove 1 through the tooth bar 7 3 is screwed to the fixing hole 14 at the upper end, and the Wheatstone bridges of the four elastic bodies 3 are combined in series, parallel or mixed connection to output a signal; one end of the shell 5 with the shell through hole 51 is sleeved on the second mounting groove 25, the shell through hole 51 is aligned with the shell fixing hole 26 on the second mounting groove 25 and fixed with screws, and the other end of the shell 5 is sleeved with the first mounting groove on the pressure head 1. This process ensures that the tails 32 of the four elastomers 3 extend into the four top surface embedded grooves 23 respectively; four bolts are used to fix the four elastomers 3 to the base 2 respectively; an elastic sealing ring 44 is placed in the sealing ring installation groove 43, and the bearing bottom surface 42 of the bearing pressure head 4 is abutted against the bearing top surface 11 of the pressure head 1 to ensure that the bearing bottom surface 42 and the bearing top surface 11 are relatively clean to prevent large particles of impurities from damaging the bearing bottom surface 42 and the bearing top surface 11. The sealing ring 44 is tightly matched with the side of the pressure head 1, and the sealing ring 44 is fixed to the bearing pressure head 4 with screws.

[0031] The column sensor with a multi-column combination of four elastic bodies 3 in Example 1 has a comprehensive accuracy of ±0.1% FS under a range of 5000kN; a spherical contact force transmission method is adopted between the load-bearing pressure head 4 and the pressure head 1, which greatly reduces the height of the load-bearing pressure head 4 and reduces the risk of the load-bearing pressure head 4 falling off, and can better adapt to large load situations; the gap between the load-bearing bottom surface 42 and the load-bearing top surface 11 can cope with part of the axial shear force and torsion.

[0032] Embodiment 2 In this embodiment, the number of elastic bodies 3 is adjusted to improve the comprehensive accuracy of the column-type connector with multiple columns.

[0033] A columnar sensor with multiple columns comprises a pressure head 1 and a base 2, 13 elastomers 3 are connected between the pressure head 1 and the base 2, a bearing pressure head 4 is connected to the end of the pressure head 1 away from the base 2, the bearing pressure head 4 is in contact with the pressure head 1, a shell 5 is sleeved between the pressure head 1 and the base 2, and the elastomer 3 and the pressure head 1, as well as the elastomer 3 and the base 2 are detachably connected.

[0034] The elastic body 3 is a cylinder, and the elastic body 3 includes a top 31 and a tail 32. Four strain gauges 6 are arranged on the side between the top 31 and the tail 32 of each elastic body 3, and the strain gauges 6 are evenly arranged in the axial direction; the top 31 of the elastic body 3 is provided with a top fixing hole 33, and the tail 32 of the elastic body 3 is provided with a tail fixing hole 34, and the top fixing hole 33 and the tail fixing hole 34 are both centrally provided as screw holes; the pressure head 1 and the base 2 are both rotating bodies; the base 2 has an inlaid top surface 22, and the inlaid top surface 22 is provided with 13 top surface embedded grooves 23, such as Figure 5 As shown, 10 top surface embedded grooves 23 are evenly distributed on the periphery of the inlaid top surface 22 and form a ring, and 3 top surface embedded grooves 23 are evenly distributed on the inner side of the ring; the shape of the top surface embedded groove 23 is set corresponding to the tail 32 of the elastic body 3, the tail 32 of the elastic body 3 and the top surface embedded groove 23 are transitionally matched, and a base through hole 24 is opened on the top surface embedded groove 23, and the base through hole 24 passes through the base 2; 13 base through holes 24 on the top 31 embedded groove are penetrated with hexagonal bolts and are respectively connected with 13 elastic body 3 fixing holes 14 on the tail 32 of the elastic body 3; the pressure head 1 includes a bearing top 3 1 and an inlay bottom surface 13, the bearing top surface 11 is a spherical structure, and is connected to the bearing pressure head 4; the inlay bottom surface 13 is a plane, and 13 bottom surface embedded grooves 13 are provided on the inlay bottom surface 13, which are arranged corresponding to the top surface embedded groove 23; a fixing hole 14 is provided on the bottom surface embedded groove 13, and the fixing hole 14 is a screw hole, which is opened in the center; the shape of the bottom surface embedded groove 13 is arranged corresponding to the top 31 of the elastic body 3, and the top 31 of the elastic body 3 is transitionally matched with the bottom surface embedded groove 13; the 13 elastic bodies 3 are respectively threadedly connected with the fixing holes 14 of the 13 bottom surface embedded grooves 13 through the tooth bar 7.

[0035] The shell 5 is cylindrical and serves as the shell 5 of the column sensor, which is used to isolate the elastomer 3 between the pressure head 1 and the base 2 from contact with the outside world. A first connecting groove is provided on the outer side surface of the pressure head 1 near the base 2, and a second connecting groove is provided on the outer side surface of the base 2 near the pressure head 1. The shell 5 is sleeved in the first connecting groove and the second connecting groove; a shell fixing hole 26 is provided on the second connecting groove, and a shell through hole 51 is provided on the end of the shell 5 that is sleeved with the second connecting groove. During installation, a screw is passed through this shell through hole 51 to threadably connect with the shell fixing hole 26 on the second connecting groove.

[0036] The bearing pressure head 4 is a rotating body, including a bearing surface 41 for contacting other equipment or objects, and a bearing bottom surface 42 abutting against the bearing top surface 11 of the pressure head 1. The bearing bottom surface 42 is a spherical structure, and the curvature radius of the bearing bottom surface 42 is slightly smaller than the curvature radius of the bearing top surface 11. When the bearing bottom surface 42 and the bearing top surface 11 are in normal contact, there is a narrow gap at the edge between the bearing top surface 11 and the bearing bottom surface 42, which can enable the columnar sensor to cope with certain axial shear in a large load test environment; the bearing surface 41 of the bearing pressure head 4 is flat, and the outer diameter of one end where the bearing surface 41 is located is The size is slightly larger than the outer diameter of one end where the bearing bottom surface 42 is located; a sealing ring mounting groove 43 is also provided at one end of the bearing bottom surface 42, and a screw hole is provided on the sealing ring mounting groove 43. A sealing ring 44 is provided in the sealing ring mounting groove 43, and the sealing ring 44 is an elastic sealing ring 44. The sealing ring 44 is located between the side surface of the end where the bearing top surface 11 of the pressure head 1 is located and the sealing ring mounting groove 43, and the sealing ring 44 is fixed with screws through the screw holes on the sealing ring mounting groove 43; four handle mounting holes 27 are provided on the side of the pressure head 1, and the four handle mounting holes 27 are evenly distributed along the side of the pressure head 1.

[0037] According to the test, the column sensor of the second embodiment, which comprises a multi-column combination of 13 elastic bodies 3, has a comprehensive accuracy of ±0.05% FS under a measuring range of 5000 kN.

[0038] Embodiment 3 like Figure 6 As shown, the connection method between the elastomer 3 and the pressure head 1 and the base 2 in this embodiment does not adopt the connection method of the threaded rod 7 and the bolt. The elastomer 3 is fixed in the bottom surface embedded groove 13 and the top surface embedded groove 23 by using the principle of thermal expansion and contraction.

[0039] The columnar sensor of multi-column combination includes a pressure head 1 and a base 2, four elastic bodies 3 are connected between the pressure head 1 and the base 2, a bearing pressure head 4 is connected to the end of the pressure head 1 away from the base 2, the bearing pressure head 4 abuts against the pressure head 1, and a shell 5 is sleeved between the pressure head 1 and the base 2.

[0040] The elastic body 3 is a cylinder, and the elastic body 3 includes a top 31 and a tail 32. Four strain gauges 6 are arranged on the side between the top 31 and the tail 32 of each elastic body 3, and the strain gauges 6 are evenly arranged in the axial direction; the pressure head 1 and the base 2 are both rotating bodies; the base 2 has an inlaid top surface 22, and the inlaid top surface 22 is provided with four top surface embedded grooves 23, which are arranged in the same way as in the first embodiment, such as Figure 4As shown, four top surface embedded grooves 23 are evenly distributed on the inlaid top surface 22 in a cross shape; the shape of the top surface embedded groove 23 is set corresponding to the tail 32 of the elastomer 3, and the tail 32 of the elastomer 3 is interference fit with the top surface embedded groove 23; the pressure head 1 includes a bearing top 31 and an inlaid bottom surface 13, the bearing top surface 11 is a spherical structure, and is connected to the bearing pressure head 4; the inlaid bottom surface 13 is a plane, and four bottom surface embedded grooves 13 are provided on the inlaid bottom surface 13, which are set corresponding to the top surface embedded groove 23; the shape of the bottom surface embedded groove 13 is set corresponding to the top 31 of the elastomer 3, and the top 31 of the elastomer 3 is interference fit with the bottom surface embedded groove 13.

[0041] The shell 5 is cylindrical and serves as the shell 5 of the column sensor, which is used to isolate the elastomer 3 between the pressure head 1 and the base 2 from contact with the outside world. A first connecting groove is provided on the outer side surface of the pressure head 1 near the base 2, and a second connecting groove is provided on the outer side surface of the base 2 near the pressure head 1. The shell 5 is sleeved in the first connecting groove and the second connecting groove; a shell fixing hole 26 is provided on the second connecting groove, and a shell through hole 51 is provided on the end of the shell 5 that is sleeved with the second connecting groove. During installation, a screw is passed through this shell through hole 51 to threadably connect with the shell fixing hole 26 on the second connecting groove.

[0042] The bearing pressure head 4 is a rotating body, including a bearing surface 41 for contacting other equipment or objects, and a bearing bottom surface 42 abutting against the bearing top surface 11 of the pressure head 1. The bearing bottom surface 42 is a spherical structure, and the curvature radius of the bearing bottom surface 42 is slightly smaller than the curvature radius of the bearing top surface 11. When the bearing bottom surface 42 and the bearing top surface 11 are in normal contact, there is a narrow gap at the edge between the bearing top surface 11 and the bearing bottom surface 42, which can enable the columnar sensor to cope with certain axial shear in a large load test environment; the bearing surface 41 of the bearing pressure head 4 is flat, and the outer diameter of one end where the bearing surface 41 is located is The size is slightly larger than the outer diameter of one end where the bearing bottom surface 42 is located; a sealing ring mounting groove 43 is also provided at one end of the bearing bottom surface 42, and a screw hole is provided on the sealing ring mounting groove 43. A sealing ring 44 is provided in the sealing ring mounting groove 43, and the sealing ring 44 is an elastic sealing ring 44. The sealing ring 44 is located between the side surface of the end where the bearing top surface 11 of the pressure head 1 is located and the sealing ring mounting groove 43, and the sealing ring 44 is fixed with screws through the screw holes on the sealing ring mounting groove 43; four handle mounting holes 27 are provided on the side of the pressure head 1, and the four handle mounting holes 27 are evenly distributed along the side of the pressure head 1.

[0043] The manufacturing and assembly method and steps of the multi-column combined column sensor in this embodiment are as follows: The processing of the elastomer 3 mainly adopts turning processing, and the height-to-diameter ratio of the elastomer 3 is in the range of H / D=2.5~3.5; 4n strain gauges 6 (n is a positive integer) are evenly distributed on the side of the elastomer 3, and 4 are used in this embodiment, all of which are on the same circumferential horizontal plane of the elastomer 3; after each elastomer 3 is manufactured, a Wheatstone bridge is assembled separately for each elastomer 3, and a single elastomer 3 is called a semi-finished sensor and its sensitivity is guaranteed, and the input and output resistance parameters are consistent; one end of the shell 5 with the shell through hole 51 is sleeved on the second mounting groove 25, and the shell through hole 51 is aligned with the shell fixing hole 26 on the second mounting groove 25 and fixed with screws; the four elastomers 3 are cooled by liquid nitrogen, and the diameters of the top 31 and the tail 32 of the elastomer 3 become smaller, the pressure head 1 and the base 2 are heated, the diameter of the bottom embedded groove 13 is increased, and the top surface The diameter of the embedded groove 23 is increased; the four elastomers 3 are connected to the base 2 to ensure that the tail 32 of the elastomer 3 is in the center position of the embedded groove 23 on the top surface; the four elastomers 3 are connected to the pressure head 1 to ensure that the top 31 of the elastomer 3 is in the center position of the embedded groove 13 on the bottom surface. In this process, the other end of the shell 5 is sleeved with the first mounting groove on the pressure head 1; the Wheatstone bridges of the four elastomers 3 are combined in series, parallel or mixed connection to output a signal; the elastic sealing ring 44 is placed in the sealing ring mounting groove 43, and the bearing bottom surface 42 of the pressure head 4 is abutted against the bearing top surface 11 of the pressure head 1 to ensure that the bearing bottom surface 42 and the bearing top surface 11 are relatively clean to prevent large particles of impurities from damaging the bearing bottom surface 42 and the bearing top surface 11. The sealing ring 44 is tightly matched with the side of the pressure head 1, and the sealing ring 44 is fixed to the bearing pressure head 4 with screws.

[0044] Compared with the threaded rod and bolt connection, the thermal expansion and contraction connection method mentioned in this embodiment reduces the processing steps for the pressure head, the base and the elastomer, thereby reducing the manufacturing cost.

[0045] The above is a detailed introduction to a column sensor with a multi-column combination provided by the present disclosure. The specific embodiments used in this article illustrate the principles and implementation methods of the present disclosure, and the description of the above embodiments is only used to help understand the present disclosure. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present disclosure, several improvements and modifications can be made to the present disclosure, and these improvements and modifications also fall within the scope of protection of the claims of the present disclosure.

Claims

1. A column sensor with multiple columns, characterized in that: It includes a pressure head and a base, including a pressure head and a base, a plurality of elastic bodies are arranged between the pressure head and the base, the elastic body is a rotating body, the elastic body has a top and a tail, and also includes a bearing pressure head abutting against one end of the pressure head away from the base, the outer sides of the pressure head and the base are connected with a shell, the top of the elastic body is detachably connected to the pressure head, and the tail of the elastic body is detachably connected to the base.

2. A multi-column combined column sensor according to claim 1, characterized in that: The pressure head includes a bearing top surface and an inlay bottom surface, the bearing top surface is a spherical structure, and the inlay bottom surface is provided with a plurality of bottom surface inlay grooves corresponding to the number of the elastic bodies, and the bottom surface inlay grooves cooperate with the top of the elastic body.

3. A multi-column combined column sensor according to claim 2, characterized in that: The base includes a bottom surface, an inlaid top surface arranged opposite to the bottom surface, a plurality of top surface inlaid grooves are arranged on the inlaid top surface, the top surface inlaid grooves are arranged corresponding to the bottom surface inlaid grooves, and the top surface inlaid grooves cooperate with the tail of the elastic body.

4. A multi-column combined column sensor according to claim 3, characterized in that: The top of the elastomer is provided with a top fixing hole, the tail of the elastomer is provided with a tail fixing hole, the bottom surface embedded groove is provided with a fixing hole, the top surface embedded groove is provided with a through hole, the top fixing hole and the fixing hole are connected by a toothed rod, and the tail fixing hole and the through hole are connected by a bolt.

5. The column sensor of multi-column combination according to claim 1, characterized in that: A plurality of strain gauges are arranged on the side between the head and the tail of the elastic body, and the strain gauges are evenly distributed in the circumferential direction on the side of the elastic body.

6. A column sensor with multiple columns according to any one of claims 1 to 5, characterized in that: The height-to-diameter ratio of the elastic body ranges from H / D=2 to 4.

7. The column sensor of multi-column combination according to claim 6, characterized in that: The bearing pressure head has a bearing surface and a bearing bottom surface arranged opposite to the bearing surface. The bearing bottom surface is a spherical structure, the bearing bottom surface abuts against the bearing top surface, and the curvature radius of the bearing bottom surface is greater than the curvature radius of the bearing top surface.

8. The column sensor of multi-column combination according to claim 7, characterized in that: The bearing pressure head is provided with a sealing ring installation groove, a sealing ring is provided between the bearing pressure head and the pressure head, and the sealing ring is arranged in the sealing ring installation groove.

9. The column sensor of multi-column combination according to claim 6, characterized in that: The outer side surface of the pressure head close to one end of the base is provided with a first connecting groove, the outer side surface of the base close to one end of the pressure head is provided with a second connecting groove, the shell is sleeved in the first connecting groove and the second connecting groove, the second connecting groove is provided with a shell fixing hole, and the shell is provided with a shell through hole.

10. The column sensor of multi-column combination according to claim 6, characterized in that: The outer side surface of the pressure head is provided with a plurality of handle mounting holes.

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