Anti-torsion device of tension and pressure sensor

Abstract

The utility model relates to an anti-torsion device for a tension and pressure sensor, which comprises a sensor base, a linear bearing, a sensor connecting sleeve and a tension and pressure sensor which are coaxially arranged, and is characterized in that the linear bearing is positioned between the sensor base and the sensor connecting sleeve and has no radial play gap; the tension and pressure sensor is located at the bottom of a cavity of the sensor base and provided with a body part and screws at the two ends, the screw at the lower end penetrates through a small hole in the bottom of the sensor base, and a first nut is screwed to the end, extending out of the sensor base, of the screw to achieve axial positioning of the tension and pressure sensor. A screw at the upper end penetrates through a through hole in the bottom of the sensor connecting sleeve, a second nut is screwed at one end, entering the sensor connecting sleeve, of the screw, the lower end face of the bottom of the sensor connecting sleeve is pressed on the upper end face of the main body part of the tension and pressure sensor when the sensor connecting sleeve is extruded, and the end face of the bottom of the sensor connecting sleeve is matched with the second nut for limiting when the sensor connecting sleeve is stretched; the linear bearing is fixedly connected with the sensor base. According to the utility model, inclined load and eccentric load are effectively controlled.

Description

Technical Field

[0001] The utility model belongs to the technical field of special vehicles and mainly relates to an anti-twisting device for a tension and pressure sensor. Background Art

[0002] At present, domestic special vehicles often use tension and pressure sensors to measure the tension or pressure on the vehicle, and adjust the vehicle's operating status through a feedback control system to achieve human-vehicle following. The working principle of the tension and pressure sensor is based on the elastic deformation of the elastic element under the action of external force, which changes the shape and size of the resistance strain gauge attached to its surface, causing the resistance value of the strain gauge to change. The subsequent circuit will receive and amplify this resistance change signal, thereby outputting an electrical signal proportional to the tension or pressure. Since the resistance strain gauge is extremely sensitive, any impact caused by a small vibration may cause a large output error. When the line of action of the loading force does not coincide with the force axis of the tension and pressure sensor, the inclined load and eccentric load will cause the tension and pressure sensor to twist, which will have a great impact on the output result, resulting in the inability of the person and the vehicle to move synchronously. Summary of the invention

[0003] In order to solve the above technical problems, the purpose of the utility model is to propose an anti-twisting device for a tension and pressure sensor, so that it can effectively eliminate the torsion problem of the tension and pressure sensor caused by the non-coincidence between the line of action of the loading force and the force axis of the tension and pressure sensor, and thus avoid the generation of large electrical signal errors caused by the torsion of the tension and pressure sensor, thereby reducing the error of the electrical signal received by the feedback control system and realizing the human-vehicle following of special vehicles.

[0004] The purpose of the utility model and the technical problem solved by the utility model are achieved by adopting the following technical solutions. According to the utility model, a tension and pressure sensor anti-twist device includes a coaxially arranged sensor base, a linear bearing, a sensor connecting sleeve and a tension and pressure sensor, wherein the linear bearing is located between the sensor base and the sensor connecting sleeve and has no radial play gap between the two; the tension and pressure sensor is located at the bottom of the sensor base cavity and has a main body with a large size in the middle and a screw with small sizes at both ends, the screw at the lower end of the tension and pressure sensor passes through a small hole at the bottom of the sensor base and cooperates with the small gap of the small hole, the first nut is tightened at one end of the screw extending out of the sensor base and presses the lower end face of the main body of the tension and pressure sensor against the bottom of the sensor base; the screw at the upper end of the tension and pressure sensor passes through the through hole at the bottom of the sensor connecting sleeve, and the end of the screw entering the sensor connecting sleeve is tightened with a second nut, the lower end face of the bottom of the sensor connecting sleeve is pressed on the upper end face of the main body of the tension and pressure sensor when it is squeezed, and the upper end face of the bottom cooperates with the second nut to limit when it is stretched; the linear bearing is connected and fixed to the sensor base.

[0005] The purpose of the utility model and the solution to its technical problems can also be further achieved by adopting the following technical measures.

[0006] The aforementioned anti-twisting device for the tension and pressure sensor, wherein the screw at the upper end of the tension and pressure sensor is matched with a large clearance of the through hole at the bottom of the sensor connecting sleeve through a positioning sleeve sleeved on its outer periphery.

[0007] The aforementioned anti-twisting device for the tension and pressure sensor, the fixed stopper comprises a second nut and a gasket, and the second nut is pressed and fixed to the shaft sleeve through the gasket.

[0008] In the aforementioned anti-twisting device for the tension and pressure sensor, the upper end of the linear bearing is provided with an outwardly turned edge, and the outwardly turned edge is fixed to the upper end surface of the sensor base by bolts.

[0009] The aforementioned anti-twisting device for the tension and pressure sensor, wherein the inner ring of the upper end surface of the sensor base is provided with an annular groove adapted to the outwardly turned edge.

[0010] The aforementioned anti-twisting device for the tension and pressure sensor, wherein the upper end of the sensor connecting sleeve extends out of the linear bearing and has a flange for connecting to the vehicle body.

[0011] The aforementioned anti-twisting device for the tension and pressure sensor, the bottom edge of the sensor base is also formed with a connecting portion for connecting to the vehicle body.

[0012] The aforementioned anti-twisting device for the tension and pressure sensor, the connecting portion includes an annular boss formed by protruding outward from the edge of the sensor base and a plurality of bolt holes evenly distributed on the outer circumference of the annular boss.

[0013] Compared with the prior art, the utility model has obvious advantages and beneficial effects. By means of the above technical solution, the utility model can achieve considerable technical progress and practicality, and has wide industrial utilization value, and has at least the following advantages:

[0014] The utility model discloses an anti-twisting device for a tension and pressure sensor, which reduces the friction between the sensor connecting sleeve and the base to a minimum through the design of a linear bearing, thereby making the movement between the two smoother; and the design of the linear bearing also ensures the radial non-movement cooperation between the sensor base and the sensor connecting sleeve, so that the loading force action lines of the two are consistent, and at the same time, through the radial non-movement cooperation between the sensor base and the tension and pressure sensor screw, the action line of the loading force coincides with the force axis of the tension and pressure sensor, effectively controlling the tilt load and the eccentric load, thereby eliminating the torsion of the tension and pressure sensor, reducing the error of the electrical signal received by the feedback control system, and realizing the human-vehicle following of the special vehicle.

[0015] The utility model also eliminates the misalignment of parts caused by manufacturing errors by assembling a screw at one end of the tension and pressure sensor and a positioning sleeve between the sensor connecting sleeve and a large clearance fit with the bottom through hole of the sensor connecting sleeve, thereby ensuring that the line of action of the loading force coincides with the force axis of the tension and pressure sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the anti-twisting device of the tension and pressure sensor of the utility model.

[0017] Figure 2 It is a schematic diagram of the composition of the anti-twist device of the tension and pressure sensor of the utility model.

[0018]

Main component symbol description

[0019] 1. Tension pressure sensor, 2. First nut, 3. Bolt hole, 4. Outward edge, 5. Positioning sleeve, 6. Gasket, 7. Second nut, 8. Sensor base, 9. Linear bearing, 10. Annular groove, 11. Sensor connecting sleeve, 12. Flange. DETAILED DESCRIPTION

[0020] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation method, structure, characteristics and effects of the anti-twisting device of the tension and pressure sensor proposed by the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0021] See also Figure 1 and Figure 2 , which is a schematic diagram of the structure of the various parts of the anti-twisting device of the tension and pressure sensor of the utility model. The anti-twisting device of the tension and pressure sensor includes a coaxially arranged sensor base 8, a linear bearing 9, a sensor connecting sleeve 11 and a tension and pressure sensor 1, and the sensor base 8, the linear bearing 9 and the sensor connecting sleeve 11 are all hollow structures.

[0022] The tension and pressure sensor 1 includes a main body with a larger radial dimension and screws with smaller radial dimensions at both ends of the main body, so that the front and rear end surfaces of the main body radially protrude from the screws at their ends. In this embodiment, the main body is cylindrical, but is not limited to this. The tension and pressure sensor 1 is located at the bottom of the cavity of the sensor base 8 and the screw at its bottom passes through the small hole in the middle of the bottom of the sensor base 8. The first nut 2 is locked on the screw of the tension and pressure sensor 1 extending out of the sensor base 8, so that the lower end surface of the main body in the middle of the tension sensor 1 is pressed against the bottom end surface of the sensor base 8, thereby realizing the axial positioning of the tension sensor 1 in the sensor base 8.

[0023] The lower end of the sensor connection sleeve 11 is located in the cavity of the sensor base 8, and the bottom of the sensor connection sleeve 11 is also provided with a through hole for the screw at the end of the tension and pressure sensor 1 to pass through. The screw at the upper end of the tension and pressure sensor 1 passes through the through hole into the sensor connection sleeve 11 and is locked with the second nut 7. The second nut 7 can transmit the tension to the tension and pressure sensor 1 when the sensor connection sleeve 11 is pulled. When the sensor connection sleeve 11 is under pressure, its bottom end face is pressed on the upper end face of the main body of the tension and pressure sensor 1.

[0024] The linear bearing 9 is located between the sensor base 8 and the sensor connecting sleeve 11, and there is no circumferential movement margin between the linear bearing 9 and the sensor base 8 and the sensor connecting sleeve 11. The linear bearing 9 is fixedly connected to the sensor base 8, and the sensor connecting sleeve 11 and the sensor base 8 can perform axial relative movement without circumferential movement, ensuring that the line of action of the loading force coincides with the force axis of the tension and pressure sensor 1.

[0025] In the embodiment of the utility model, there is no circumferential play margin between the tension and pressure sensor 1 and the small hole at the bottom of the sensor base 8. In order to reduce the requirements for processing accuracy, a positioning sleeve 5 is further provided between the through hole at the bottom of the sensor connecting sleeve 11 and the screw of the tension and pressure sensor 1, and the positioning sleeve 5 and the sensor connecting sleeve 11 are matched with a large gap. The gap between the positioning sleeve 5 and the sensor connecting sleeve 11 can make the tension and pressure sensor 1 and the sensor connecting sleeve 11 slide relative to each other when subjected to radial tension and pressure, which can effectively eliminate the radial force generated when the tension and pressure sensor 1 and the sensor connecting sleeve are not completely concentric, ensure that the tension and pressure sensor 1 is only subjected to axial force, and effectively solve the interference of radial tension and pressure generated by the different axes of parts caused by manufacturing errors on the tension and pressure sensor.

[0026] The second nut 7 is pressed against the upper end surface of the positioning sleeve 5 through the gasket 6, so that the positioning sleeve 5 is in close contact with the upper end surface of the main body of the tension and pressure sensor 1. The axial extension length of the positioning sleeve 5 is greater than the length of the through hole on the sensor connecting sleeve 11. The sensor connecting sleeve 11 applies tension to the tension and pressure sensor 1 through the gasket 6.

[0027] In the embodiment of the utility model, the bottom edge of the sensor base 8 is also formed with a connecting portion for connecting to the vehicle body. Preferably, the connecting portion includes an annular boss formed by protruding outward from the bottom edge of the sensor base 8 and bolt holes 3 evenly distributed on the outer periphery of the annular boss. There are four bolt holes 3, and the connecting line of the centers of the four bolt holes 3 is rectangular to facilitate better connection with the vehicle body.

[0028] In the embodiment of the utility model, the upper end of the linear bearing 9 has an outward-turned edge 4, and the outward-turned edge 4 is provided with a fixing hole. The inner circle of the upper end surface of the sensor base 8 is provided with an annular groove 10 adapted to the outward-turned edge 4, and the annular groove 10 is also provided with a threaded hole corresponding to the fixing hole on the outward-turned edge. The bolt with its head located in the fixing hole is adapted to be locked with the threaded hole in the annular groove 10 to realize the connection between the sensor base 8 and the linear bearing 9.

[0029] In this embodiment, the upper end of the sensor connecting sleeve 11 extends out of the linear bearing 9 and has a flange 12 for connecting with the vehicle body. The flange 12 is provided with threaded holes for bolt connection with the vehicle body.

[0030] During assembly of the utility model, the tension and pressure sensor 1 is placed from the open opening at the upper end of the sensor base 8. When the tension and pressure sensor 1 reaches the bottom of the sensor base 8, the screw at the lower end of the tension and pressure sensor 1 passes through the small round hole at the bottom of the sensor base 8, and the first nut 2 is tightened on the end of the screw extending out of the sensor base 8.

[0031] Place the lower end of the linear bearing 9 into the sensor base 8. At this time, the inner diameter of the sensor base 8 is matched with the outer diameter of the linear bearing 9 to ensure that the linear bearing 9 has no movement in the circumferential direction; fix the upper end of the linear bearing 9 to the sensor base 8 by bolts, so that the linear bearing 9 bears force from one direction.

[0032] The sensor connecting sleeve 11 is installed into the linear bearing 9. The outer circle size of the sensor connecting sleeve 11 matches the inner circle size of the linear bearing 9, so that the sensor connecting sleeve 11 has no movement in the circumferential direction; when the bottom end face of the sensor connecting sleeve 11 is pressed on the upper end face of the main body of the tension and pressure sensor 1, the screw at the upper end of the tension and pressure sensor 1 passes through the through hole at the bottom of the sensor connecting sleeve 11 and enters the sensor connecting sleeve 11, the positioning sleeve 5 is installed on the screw, and then the gasket 6 is sleeved on the outer periphery of the screw, and finally the gasket 6 and the positioning sleeve 5 are tightened by the second nut 7.

[0033] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A tension and pressure sensor anti-twist device, characterized in that: It includes a coaxially arranged sensor base, a linear bearing, a sensor connecting sleeve and a tension and pressure sensor, wherein the linear bearing is located between the sensor base and the sensor connecting sleeve and has no radial play clearance between the two; the tension and pressure sensor is located at the bottom of the sensor base cavity and has a main body with a large size in the middle and screws with small sizes at both ends, the screw at the lower end of the tension and pressure sensor passes through a small hole at the bottom of the sensor base and cooperates with the small gap of the small hole, a first nut is tightened at the end of the screw extending out of the sensor base and presses the lower end surface of the main body of the tension and pressure sensor against the bottom of the sensor base; the screw at the upper end of the tension and pressure sensor passes through the through hole at the bottom of the sensor connecting sleeve, and the end of the screw entering the sensor connecting sleeve is tightened with a second nut, and when the sensor connecting sleeve is squeezed, the lower end surface of the bottom is pressed on the upper end surface of the main body of the tension and pressure sensor, and when stretched, the bottom end surface cooperates with the second nut to limit the position; the linear bearing is connected and fixed to the sensor base.

2. The anti-twist device for the tension and pressure sensor according to claim 1, characterized in that: The screw at the upper end of the tension and pressure sensor is matched with a through hole at the bottom of the sensor connecting sleeve with a large gap through a positioning sleeve sleeved on its outer periphery.

3. The anti-twist device for the tension and pressure sensor according to claim 2, characterized in that: The second nut is pressed and fixed to the shaft sleeve through a gasket.

4. The anti-twist device for the tension and pressure sensor according to claim 3, characterized in that: An outwardly turned edge is arranged at the upper end of the linear bearing, and the outwardly turned edge is fixed to the upper end surface of the sensor base by bolts.

5. The anti-twist device for the tension and pressure sensor according to claim 4, characterized in that: An inner circle of the upper end surface of the sensor base is provided with an annular groove adapted to the outwardly turned edge.

6. The anti-twist device for the tension and pressure sensor according to claim 3, characterized in that: The upper end of the sensor connecting sleeve extends out of a linear bearing and is provided with a flange for connecting with a vehicle body.

7. The anti-twist device for the tension and pressure sensor according to claim 3, characterized in that: The bottom edge of the sensor base is also formed with a connecting portion for connecting with a vehicle body.

8. The anti-twist device for the tension and pressure sensor according to claim 7, characterized in that: The connecting portion comprises an annular boss formed by protruding outward from the edge of the sensor base and a plurality of bolt holes uniformly distributed on the outer periphery of the annular boss.

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