A positioning device for a cylindrical structure displacement sensor

Abstract

The application discloses a positioning device suitable for a cylindrical structure displacement sensor, and the winding device is provided with a limiting groove, a supporting column, a ratchet wheel assembly, a transmission rod, a supporting arm assembly and a nut. The ratchet wheel assembly can be manually forced to drive the transmission rod to move. The supporting arm can be stretched and contracted along the limiting groove under the force of the transmission rod. The positioning device can adapt to cylindrical structures of different sizes, is accurate in positioning, can keep the positioning position for a long time, guarantees the stability of test and test equipment, and thus solves the problem that the displacement sensor in the existing cylindrical structure is difficult to fix.

Description

Technical Field

[0001] This invention relates to the field of displacement sensor fixing devices, and in particular to a fixing device for displacement sensors in cylindrical structures. Background Technology

[0002] The function of a displacement sensor is to convert displacement into an electrical signal and transmit it to a data acquisition unit. For general structures, it can be fixed by screws or glue. However, in cylindrical structures, due to the inconvenience of construction and the tendency for traditional fixing methods to loosen, improvements are needed.

[0003] Prior art: Sensor fixing device, application number CN202010029262.6, a sensor fixing device includes: a base, a first clamping plate, a second clamping plate, a first connecting member, and a first fastener; the first clamping plate is provided with a first connecting hole, the second clamping plate is provided with a second connecting hole, the first connecting member passes through the first connecting hole of the first clamping plate and the second connecting hole of the second clamping plate, and is connected to the first fastener; the bottom end face of the first connecting member and the end face of the first fastener limit the first clamping plate and the second clamping plate between the bottom end face of the first connecting member and the end face of the first fastener; the base is provided with a third connecting hole, the first connecting member passes through the third connecting hole of the base and is fixedly connected to the base. The embodiments of this application, through the adjustable position of the first and second clamping plates, enable the sensor fixing device to fix sensors of different sizes, improving the applicability of the sensor fixing device and making sensor installation and removal more convenient.

[0004] While this technology allows the sensor mounting device to fix sensors of different sizes, improving its applicability and making sensor installation and removal more convenient, it cannot guarantee that the fixture will still function effectively in cylindrical structures.

[0005] Therefore, how to design a novel sensor fixing device for fixing displacement sensors in cylindrical structures and ensuring the stability of experimental and testing equipment is a problem that researchers in this field need to solve. Summary of the Invention

[0006] The purpose of this invention is to provide a cylindrical displacement sensor positioning device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a positioning device for a displacement sensor with a cylindrical structure, comprising a limiting groove, a support column, a ratchet assembly, a transmission rod, a support arm assembly, and a nut, wherein the limiting groove is located in the groove of the support arm assembly and is slidably connected thereto; the support column is located at the center of the ratchet assembly, and the ratchet assembly is rotatably connected to the support column; both ends of the transmission rod are annular; the upper end of the ratchet assembly is rotatably connected to one end of the transmission rod; the support arm assembly is rotatably connected to the other end of the transmission rod; the ratchet assembly drives the support arm assembly to move on the limiting groove through the transmission rod; the nut is located at both ends of the transmission rod and is threadedly connected to the components thereon when the transmission rod is rotatably connected to the ratchet assembly and the support arm assembly.

[0008] Furthermore, the device also includes a top plate, an annular wall, and a bottom plate, wherein the top plate is located above the support column and is fixedly connected to it, and has four limiting grooves thereon; the bottom plate is located below the support column and is fixedly connected to it; an annular wall is provided between the top plate and the bottom plate, and the annular wall is engaged with the top plate and the bottom plate through a slot thereon.

[0009] Furthermore, the ratchet assembly includes a ratchet, a drive ring, a pawl, a rotating shaft, and a drive rod, wherein the rotating shaft is located at the center of the ratchet and is rotatably connected to it, the upper end of the inner ring of the drive ring is provided with a pawl, the center of the drive ring is provided with a ratchet and is connected to the ratchet through the pawl, and the outer ring of the drive ring is fixedly connected to the front end of the drive rod.

[0010] Furthermore, the ratchet assembly also includes a C-shaped ring, an outer ring, and a transmission disc. The C-shaped ring is located inside the drive ring and outside the ratchet, with the pawl inside its C-shaped opening and its lower surface fixedly connected to the outer ring. The lower surface of the transmission disc is fixedly connected to the upper end of the ratchet. The transmission disc has four protrusions for connecting the transmission rod, and the four protrusions are provided with threaded sections. When the transmission rod is fitted onto the protrusion, the nut is threadedly connected to the protrusion. The outer ring is a cylindrical structure with an open upper end, located outside the drive ring, and fixedly connected to the rotating shaft.

[0011] Furthermore, the support arm assembly includes support arms, a central groove, and a fixed shaft. The front ends of the four support arms have a certain curvature, and a central groove is provided in the middle of the support arm. The central groove is slidably connected to the limiting groove. A fixed shaft is provided at the lower end of the support arm. A threaded section is provided on the fixed shaft. When the transmission rod is sleeved on the fixed shaft, the nut is threadedly connected to the fixed shaft, and the fixed shaft is rotatably connected to the transmission rod.

[0012] Furthermore, the support arm assembly also includes a threaded opening, a fixing sleeve, and a rubber pad. The threaded opening is located at the center of the support arm and is a through hole that penetrates the support arm. The rear part of the threaded opening has a threaded structure. The fixing sleeve is located inside the threaded opening and has threads at its rear end to cooperate with the threaded structure at the rear part of the threaded opening. The rubber pad is located at the front end of the support arm and is fully fitted with the curvature of the front end of the support arm.

[0013] Furthermore, a positioning device for a displacement sensor with a cylindrical structure also includes an electric telescopic rod, a motor, a first gear, and bearings. Each of the left and right side plates is provided with a rotatable bearing, and the bearing through hole communicates with the slot of the frame. The output end of the electric telescopic rod is fixedly connected to the outer surface of the central groove on the outer side of the reel, and the other end is fixedly connected to the bearing on the side plate. The electric telescopic rod causes the first reel or the second reel to slide in the direction of the fixed sleeve.

[0014] Furthermore, the first spool is located below the second and third gears and meshes with them. The first spool can mesh with both the second and third gears simultaneously, or with either the second or third gear separately. Attached Figure Description

[0015] Figure 1 Schematic diagram of four sensors arranged when the support arm of the positioning device is extended.

[0016] Figure 2 Schematic diagram of four sensors arranged when the support arm of the positioning device retracts.

[0017] Figure 3 Schematic diagram of two sensors arranged when the support arm of the positioning device is extended.

[0018] Figure 4 Schematic diagram of two sensors arranged when the support arm of the positioning device retracts.

[0019] Figure 5 Support arm schematic diagram

[0020] Figure 6 Ratchet assembly schematic diagram

[0021] Figure 7 3D view of ratchet assembly

[0022] Figure 8 Cross-sectional view of positioning device

[0023] The components are as follows: 1. Top plate, 2. Annular wall, 3. Bottom plate, 4. Limiting groove, 5. Support column, 6. Ratchet assembly, 7. Transmission rod, 8. Support arm assembly, 9. Nut, 10. Sensor assembly, 61. Ratchet, 62. C-ring, 63. Drive ring, 64. Pawl, 65. Rotating shaft, 66. Outer ring, 67. Transmission disc, 68. Drive rod, 81. Support arm, 82. Intermediate groove, 83. Threaded opening, 84. Fixed shaft, 85. Fixed sleeve, 86. Rubber pad, 101. Data collection end, 102. Data processing end. Detailed Implementation

[0024] Reference Figure 1 , Figure 2 The present invention provides an embodiment of a positioning device for a cylindrical displacement sensor, comprising a limiting groove 4, a support column 5, a ratchet assembly 6, a transmission rod 7, a support arm assembly 8, and a nut 9. The limiting groove 4 is located in the groove of the support arm assembly 8 and is slidably connected to it. The limiting groove 4 can restrict the support arm 8 from sliding in a fixed direction, thereby ensuring that the included angle formed by the four support arms does not change, and thus ensuring the overall stability of the positioning device.

[0025] Reference Figure 1 , Figure 2 Furthermore, the support column 5 is located at the center of the ratchet assembly 6, and the ratchet assembly 6 is rotatably connected to the support column 5. The two ends of the transmission rod 7 are circular. The upper end of the ratchet assembly 6 is rotatably connected to one end of the transmission rod 7, and the support arm assembly 8 is rotatably connected to the other end of the transmission rod 7. The ratchet assembly 6 drives the support arm assembly 8 to move on the limiting groove 4 through the transmission rod 7. Both ends of the transmission rod 7 are rotatably connected. Therefore, when the ratchet assembly 6 drives the transmission rod 7 to tighten, it does not affect the contraction of the support arm assembly 8 on the limiting groove 4.

[0026] Reference Figure 1 , Figure 2 Furthermore, the nuts 9 are located at both ends of the transmission rod 7, and are threadedly connected to the components on the transmission rod 7 when it is rotatably connected to the ratchet assembly 6 and the support arm assembly 8. The nuts 9 ensure that the transmission rod 7 will not disengage from the ratchet assembly 6 and the support arm assembly 8, thereby ensuring the overall operation of the positioning device.

[0027] Reference Figure 8 Furthermore, a positioning device for a displacement sensor suitable for a cylindrical structure also includes a top plate 1, an annular wall 2, and a bottom plate 3. The top plate 1 is located above the support column 5 and is fixedly connected to it, and the top plate 1 has four limiting grooves 4. The bottom plate 3 is located below the support column 5 and is fixedly connected to it. An annular wall 2 is provided between the top plate 1 and the bottom plate 3, and the annular wall 2 is connected to the top plate 1 and the bottom plate 3 by a slot on it.

[0028] Reference Figure 6 , Figure 7 Furthermore, the ratchet assembly 6 includes a ratchet 61, a C-ring 62, a drive ring 63, a pawl 64, a rotating shaft 65, an outer ring 66, a transmission disc 67, and a drive rod 68. The rotating shaft 65 is located at the center of the ratchet 61 and is rotatably connected to it. The upper end of the inner ring of the drive ring 63 is provided with a pawl 64, and the center of the drive ring 63 is provided with the ratchet 61. The pawl 64 engages with the ratchet 61, and the pawl 64 cooperates with the ratchet 61 so that the ratchet can only move counterclockwise. This ensures that after the positioning device is fixed in position, the support arm assembly 8 will not loosen due to external force, thus affecting the function of the positioning device.

[0029] Reference Figure 6 , Figure 7 Furthermore, the outer ring of the drive ring 63 is fixedly connected to the front end of the drive rod 68. The C-shaped ring 62 is located inside the drive ring 63 and outside the ratchet 61. The pawl 64 is located inside its C-shaped opening. The lower surface of the C-shaped ring 62 is fixedly connected to the outer ring 66. The C-shaped ring 62 is used to limit the position of the drive ring 63. When the pawl 64 touches the opening of the C-shaped ring 62, it will be restricted, thereby causing the drive ring 63 to spring back, making it easier to perform the next movement.

[0030] Reference Figure 6 , Figure 7 Furthermore, the lower surface of the transmission disc 67 is fixedly connected to the upper end of the ratchet 61. The transmission disc 67 has four protrusions for connecting the transmission rod 7. The four protrusions are provided with threaded sections. When the transmission rod 7 is fitted onto the protrusions, the nut 9 is threadedly connected to the protrusions to fix the transmission rod 7, so that the positioning device will not loosen during operation. The transmission disc 67 transmits the force generated by the ratchet assembly 6 to the transmission rod 7, and then from the transmission rod 7 to the support arm assembly 8, providing the support arm assembly 8 with the force to extend or retract.

[0031] Reference Figure 6 , Figure 7 Furthermore, the outer ring 66 is a cylindrical structure with an open top, located outside the drive ring 63, and fixedly connected to the rotating shaft 65.

[0032] Reference Figure 5 Furthermore, the support arm assembly 8 includes a support arm 81, a central groove 82, a threaded opening 83, a fixed shaft 84, a fixed sleeve 85, and a rubber pad 86. The front ends of the four support arms (81) have a certain curvature, which can better support the inner wall of the cylindrical structure.

[0033] Reference Figure 5 Furthermore, the support arm 81 is provided with a central groove 82 in the middle, and is slidably connected to the limiting groove 4 through the central groove 82, thereby restricting the movement trajectory of the support arm 81 and ensuring that it moves inside the limiting groove 4.

[0034] Reference Figure 5 Furthermore, a fixed shaft 84 is provided at the lower end of the support arm 81, and a threaded section is provided on the fixed shaft 84. When the transmission rod 7 is sleeved on the fixed shaft 84, the nut 9 is threadedly connected to the fixed shaft 84, and the fixed shaft 84 is rotatably connected to the transmission rod 7, ensuring the stability of the connection between the support arm 81 and the transmission rod 7.

[0035] Reference Figure 5 Furthermore, the threaded opening 83 is located at the center of the support arm 81, and the threaded opening 83 is a through hole that penetrates the support arm 81, so that the sensor assembly 10 can transmit data through wires.

[0036] Reference Figure 5 Furthermore, the threaded opening 83 has a threaded structure at the rear part, and the fixing sleeve 85 is located inside the threaded opening 83. The fixing sleeve 85 has a thread at the rear end, which is used to cooperate with the threaded structure at the rear part of the threaded opening 83, so that the fixing sleeve 85 can be fixed inside the support arm 81.

[0037] Reference Figure 5 Furthermore, the rubber pad 86 is located at the front end of the support arm 81 and is fully fitted with the arc of the front end of the support arm 81, which can increase the friction between the support arm 81 and the inner wall of the cylindrical structure and ensure the stability of the positioning device during use.

[0038] Reference Figure 5 Furthermore, the sensor assembly 10 includes a data collection end 101 and a data processing end 102. The data collection end 101 is located at the front end of the sensor assembly 10, is needle-shaped, and has a telescopic function, which can adapt to cylindrical structures of different sizes and can accurately collect the data. The data processing end 102 is located at the rear end of the sensor assembly 10.

Claims

1. A positioning device for a displacement sensor with a cylindrical structure, characterized in that, Includes a limiting groove (4), a support column (5), a ratchet assembly (6), a transmission rod (7), a support arm assembly (8), and a nut (9), among which The limiting groove (4) is located within the groove of the support arm assembly (8) and is slidably connected to it. The support column (5) is located at the center of the ratchet assembly (6), and the ratchet assembly (6) is rotatably connected to the support column (5). The transmission rod (7) has two circular ends. The upper end of the ratchet assembly (6) is rotatably connected to one end of the transmission rod (7), and the other end of the support arm assembly (8) is rotatably connected to the transmission rod (7). The ratchet assembly (6) drives the support arm assembly (8) to move on the limiting groove (4) through the transmission rod (7). Nuts (9) are located at both ends of the transmission rod (7) and are threadedly connected to the components on the transmission rod (7) when it is rotatably connected to the ratchet assembly (6) and the support arm assembly (8). The ratchet assembly (6) includes a ratchet (61), a drive ring (63), a pawl (64), a rotating shaft (65), and a drive rod (68), wherein The rotating shaft (65) is located at the center of the ratchet (61) and is rotatably connected to it. A pawl (64) is provided at the upper end of the inner ring of the drive ring (63), and a ratchet (61) is provided at the center of the drive ring (63), and the pawl (64) engages with the ratchet (61). The outer ring of the drive ring (63) is fixedly connected to the front end of the drive rod (68). The ratchet assembly (6) also includes a C-ring (62), an outer ring (66), and a transmission disc (67), wherein The C-ring (62) is located inside the drive ring (63) and outside the ratchet (61), with the pawl (64) located inside its C-shaped opening. The lower surface of the C-ring (62) is fixedly connected to the outer ring (66). The lower surface of the transmission disc (67) is fixedly connected to the upper end of the ratchet (61). The transmission disc (67) has four protrusions for connecting the transmission rod (7). The four protrusions are provided with threaded sections. When the transmission rod (7) is fitted onto the protrusions, the nut (9) is threadedly connected to the protrusions. The outer ring (66) is a cylindrical structure with an open top, located outside the drive ring (63), and fixedly connected to the rotating shaft (65). It also includes a top plate (1), an annular wall (2), and a bottom plate (3), among which The top plate (1) is located above the support column (5) and is fixedly connected to it, and the top plate (1) has four limiting grooves (4). The base plate (3) is located below the support column (5) and is fixedly connected to it. An annular wall (2) is provided between the top plate (1) and the bottom plate (3), and the annular wall (2) is connected to the top plate (1) and the bottom plate (3) through its slot.

2. The apparatus according to claim 1, characterized in that, The support arm assembly (8) includes a support arm (81), a central groove (82), and a fixed shaft (84), wherein The front ends of the four support arms (81) have a certain curvature. The support arm (81) has a central groove (82) in the middle, and is slidably connected to the limiting groove (4) through the central groove (82). A fixed shaft (84) is provided at the lower end of the support arm (81), and a threaded section is provided on the fixed shaft (84). When the transmission rod (7) is fitted onto the fixed shaft (84), the nut (9) is threadedly connected to the fixed shaft (84). The fixed shaft (84) is rotatably connected to the transmission rod (7).

3. The apparatus according to claim 2, characterized in that, The support arm assembly (8) also includes a threaded opening (83), a fixing sleeve (85), and a rubber pad (86), wherein The threaded opening (83) is located at the center of the support arm (81), and the threaded opening (83) is a through hole that penetrates the support arm (81). The rear part has a threaded structure. The fixed sleeve (85) is located inside the threaded opening (83). The fixed sleeve (85) has a thread at the rear end, which is used to match the thread structure at the rear part of the threaded opening (83). The rubber pad (86) is located at the front end of the support arm (81) and fits perfectly with the arc of the front end of the support arm (81).

4. The apparatus according to claim 3, characterized in that, It also includes a sensor assembly (10), in which The sensor assembly (10) is located inside the fixed sleeve (85) and is fixedly connected to it.

5. The apparatus according to claim 4, characterized in that, The sensor assembly (10) includes a data collection end (101) and a data processing end (102), wherein The data collection end (101) is located at the front end of the sensor assembly (10), is needle-shaped, and has a telescopic function. The data processing end (102) is located at the rear end of the sensor assembly (10).

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