Joint meter convenient and rapid to assemble

Abstract

The utility model relates to the technical field of joint meters, in particular to a joint meter convenient and fast to assemble, which comprises an assembling ring, a fixing screw rod is fixedly mounted on one side of the assembling ring, a connecting mechanism is arranged on the outer side of the fixing screw rod, the connecting mechanism comprises a first fixing screw cylinder, a joint measuring mechanism is arranged in the first fixing screw cylinder, and a second fixing screw cylinder is arranged on the outer side of the first fixing screw cylinder. A first rotating clamp is fixedly installed on one side of the first fixed screw cylinder, a first bearing is fixedly installed in the first rotating clamp, a cross shaft is fixedly installed in the first bearing, and a second bearing is fixedly installed on the side, away from the rotating clamp, of the cross shaft. The problems of deformation of the seam measuring rod and abnormal abrasion of a contact are avoided, the measurement stability and the equipment service life in a complex environment are remarkably improved, meanwhile, the requirement for installation precision is lowered, the remarkable engineering practical value is achieved, a screw assembly is integrally removed, a screwing structure is adopted, and overall assembly is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of gap measuring technology, specifically a gap measuring device that is easy and quick to assemble. Background Technology

[0002] Resistance joint gauges are core sensors used in civil engineering, underground engineering and other fields to monitor the displacement of structural cracks or joints. Traditional resistance joint gauges usually consist of a measuring rod, a measuring cylinder, a sliding contact and a resistive element. The axial extension and retraction of the measuring rod in the measuring cylinder drives the contact to change the resistance value, thereby realizing the conversion of displacement into an electrical signal.

[0003] However, in actual engineering, cracks are often accompanied by multidimensional displacements (such as lateral offset and angular deflection). Traditional crack measuring rods and crack measuring cylinders are rigidly connected, and non-axial displacements are directly transmitted to the measuring rods, causing them to bend and deform or get stuck against the cylinder wall. This can lead to poor contact between the contacts and the resistive elements, signal jumps, or even mechanical damage. During installation, it is necessary to strictly ensure that the axes of the measuring rods and the measuring cylinders are aligned. Construction errors or uneven settlement of the foundation can easily lead to initial deviations. Long-term accumulated deviations will significantly reduce measurement accuracy. The continuous lateral force acting on the measuring rods will accelerate contact wear and resistive element fatigue, requiring frequent maintenance and calibration, which increases the cost of use. Utility Model Content

[0004] The purpose of this invention is to provide a gap gauge that is easy and quick to assemble, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A convenient and quick-assembly seam gauge includes an assembly ring, a fixing screw fixedly installed on one side of the assembly ring, a connecting mechanism provided on the outside of the fixing screw, the connecting mechanism including a first fixing screw cylinder, a seam measuring mechanism provided inside the first fixing screw cylinder, a first rotating clamp fixedly installed on one side of the first fixing screw cylinder, a first bearing fixedly installed inside the first rotating clamp, a cross shaft fixedly installed inside the first bearing, and a second bearing fixedly installed on the side of the cross shaft away from the rotating clamp.

[0007] Preferably, the connecting mechanism further includes a second rotating clamp and a connecting plate, wherein a second bearing is fixedly installed inside the second rotating clamp.

[0008] Preferably, a second fixing screw is fixedly installed on the side of the second rotating clamp away from the second bearing, and a fixing screw is screwed inside the second fixing screw.

[0009] Preferably, a connecting screw is screwed onto the connecting plate, and an assembly screw is fixedly installed on the side of the connecting plate near the connecting screw.

[0010] Preferably, an assembly nut is screwed onto the assembly screw, and an assembly ring is movably installed between the assembly nuts.

[0011] Preferably, the seam measuring mechanism includes a seam measuring cylinder, a first cap is screwed onto one side of the seam measuring cylinder, and a screw rod is fixedly installed on one side of the first cap.

[0012] Preferably, a second cover is screwed onto the side of the measuring cylinder away from the first cover, and a measuring rod is movably installed inside the second cover. The measuring rod and the screwing rod are movably installed inside the first fixed screw cylinder.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This easy-to-assemble joint gauge can compensate for non-axial displacement by rotating the cross shaft and the connecting ring, avoiding deformation of the joint measuring rod and abnormal wear of the contact points. It significantly improves the measurement stability and equipment life in complex environments, while reducing the installation accuracy requirements, and has significant engineering practical value.

[0015] 2. This easy and quick-assembly gap gauge adopts a self-propelled screw structure, eliminating the need for multiple screw components during assembly, thus making the overall assembly more convenient. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall connection of this utility model;

[0018] Figure 3 This is a schematic diagram of the connecting plate of this utility model;

[0019] Figure 4 This is a schematic diagram of the connection structure of the cross shaft of this utility model.

[0020] In the diagram: 101, assembly ring; 102, fixing screw; 103, connecting mechanism; 104, first fixing screw barrel; 105, seam measuring mechanism; 106, first rotating clamp; 201, first bearing; 202, cross shaft; 203, second bearing; 204, second rotating clamp; 205, connecting plate; 206, second fixing screw barrel; 302, connecting screw; 303, assembly screw; 304, assembly nut; 305, seam measuring barrel; 306, first cap; 401, screw rod; 402, second cap; 403, seam measuring rod. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-4 As shown, this utility model provides a technical solution:

[0023] A convenient and quick-assembly seam gauge includes an assembly ring 101. A fixing screw 102 is fixedly installed on one side of the assembly ring 101. A connecting mechanism 103 is provided on the outside of the fixing screw 102. The connecting mechanism 103 includes a first fixing screw cylinder 104. A seam measuring mechanism 105 is provided inside the first fixing screw cylinder 104. A first rotating clamp 106 is fixedly installed on one side of the first fixing screw cylinder 104. A first bearing 201 is fixedly installed inside the first rotating clamp 106. A cross shaft 202 is fixedly installed inside the first bearing 201. A second bearing 203 is fixedly installed on the side of the cross shaft 202 away from the rotating clamp.

[0024] With the above scheme, the assembly ring can be connected to the connecting structure by the fixed screw, the connecting structure and the measuring gap structure can be assembled by the first fixed screw, the first bearing can be fixed by the first rotating clamp, and the cross shaft can be rotated by the first bearing and the second bearing. The rotation of the cross shaft can offset some of the non-axial displacement of the measuring gap gauge during use.

[0025] In this embodiment, preferably, the connecting mechanism 103 further includes a second rotating clamp 204 and a connecting plate 205, wherein a second bearing 203 is fixedly installed inside the second rotating clamp 204.

[0026] The second bearing can be installed using the second rotating clamp as described above.

[0027] In this embodiment, preferably, a second fixing screw 206 is fixedly installed on the side of the second rotating clamp 204 away from the second bearing 203, and a fixing screw 102 is screwed inside the second fixing screw 206.

[0028] The above method allows for the installation of the fixing screw via the second fixing cylinder, thereby completing the assembly of the assembly ring.

[0029] In this embodiment, preferably, a connecting screw 302 is screwed onto the connecting plate 205, and an assembly screw 303 is fixedly installed on the side of the connecting plate 205 near the connecting screw 302.

[0030] The above scheme allows the connecting plate to be fixed by the connecting screw, and the connecting ring to rotate and shift by assembling the screw.

[0031] In this embodiment, preferably, an assembly nut 304 is screwed onto the assembly screw 303, and an assembly ring 101 is movably installed between the assembly nuts 304.

[0032] The above method allows the assembly ring to be positioned on the assembly screw by using the assembly nut.

[0033] In this embodiment, preferably, the seam measuring mechanism 105 includes a seam measuring cylinder 305, a first cover 306 is screwed onto one side of the seam measuring cylinder 305, and a screw rod 401 is fixedly installed on one side of the first cover 306.

[0034] With the above solution, the internal components of the side seam cylinder can be easily disassembled and assembled by screwing the first cap onto the side seam cylinder, and the first cap can be easily assembled with the connecting structure by screwing the rod.

[0035] In this embodiment, preferably, a second cover 402 is screwed onto the side of the measuring cylinder 305 away from the first cover 306, and a measuring rod 403 is movably installed inside the second cover 402. The measuring rod 403 and the screw rod 401 are movably installed inside the first fixed screw cylinder 104.

[0036] With the above solution, the internal components of the joint measuring cylinder can be disassembled and assembled through the second cover, and the joint measuring rod can be extended and retracted inside the joint measuring cylinder to obtain the change value of the crack, and the first joint measuring rod can be assembled with the connecting structure.

[0037] In this embodiment, a convenient and quick-assembly crack gauge is used by the user who screws the first cap 306 and the second cap 402 onto both sides of the crack measuring cylinder 305 to assemble the crack measuring rod 403 and the screw rod 401. After assembly, the user screws the first fixing cylinder 104 onto the screw rod 401 and the crack measuring rod 403, and screws the fixing screw 102 onto the second fixing cylinder 206 to complete the assembly of the measuring structure. After assembly, the user drills holes on both sides of the crack, and then passes the connecting screw 302 through the connecting plate 2. After connection 05, the connecting plate 205 is fixed. Then, the user connects the assembly ring 101 to the assembly screw 303 and screws it in using the assembly nut 304 to fix the entire structure to the crack. In this structure, the end of the measuring rod 403 located inside the measuring cylinder 305 is equipped with a sliding contact (brush). A linear sliding resistor element (total resistance R0, effective length L) is installed on the inner wall of the measuring cylinder 305. The two ends of the resistor element are connected to a measuring circuit (such as a voltage divider circuit or a Wheatstone bridge) through wires. When the crack width changes, the measuring rod 403 moves within the measuring cylinder... The axial extension and retraction of 305 causes the sliding contact to slide along the surface of the resistive element. The contact acts as a dynamic connection point in the circuit, forming a voltage divider relationship with the two ends of the resistive element (or serving as one arm of a bridge). At this time, one end of the resistive element is connected to the input voltage (Vin), and the other end is grounded or connected to a reference potential. The sliding contact then acts as the voltage divider output terminal (Vout), converting the resistance change (R=R0·x / L, where x is the extension and retraction of the measuring rod 403) into a voltage signal (Vout=Vin·R / (R0+R)). If a Wheatstone bridge is used, the resistive element and three fixed resistors form a bridge circuit. The contact displacement causes the bridge to become unbalanced, and a differential voltage signal is output. After subsequent amplification, filtering and analog-to-digital conversion, the circuit signal outputs a digital displacement, thereby obtaining the crack change. When measuring the crack, the non-axial movement caused by the crack change is compensated by the rotation of the cross shaft 202 in the first bearing 201 and the second bearing 203, as well as the rotation of the connecting ring on the assembly screw 303, thereby avoiding the problem of damage to the measuring rod 403 and abnormal wear of the contacts caused by non-axial movement.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A gap measuring instrument that is easy and quick to assemble, characterized in that: The assembly includes an assembly ring (101), on one side of which a fixing screw (102) is fixedly installed. A connecting mechanism (103) is provided on the outside of the fixing screw (102). The connecting mechanism (103) includes a first fixing screw cylinder (104), inside which a seam measuring mechanism (105) is provided. On one side of the first fixing screw cylinder (104), a first rotating clamp (106) is fixedly installed. Inside the first rotating clamp (106), a first bearing (201) is fixedly installed. Inside the first bearing (201), a cross shaft (202) is fixedly installed. On the side of the cross shaft (202) away from the rotating clamp, a second bearing (203) is fixedly installed.

2. The easy-to-assemble gap gauge according to claim 1, characterized in that: The connecting mechanism (103) further includes a second rotating clamp (204) and a connecting plate (205), wherein a second bearing (203) is fixedly installed inside the second rotating clamp (204).

3. The easy and quick-assembly gap gauge according to claim 2, characterized in that: A second fixing screw (206) is fixedly installed on the side of the second rotating clamp (204) away from the second bearing (203), and a fixing screw (102) is screwed inside the second fixing screw (206).

4. The easy-to-assemble gap gauge according to claim 3, characterized in that: A connecting screw (302) is screwed onto the connecting plate (205), and an assembly screw (303) is fixedly installed on the side of the connecting plate (205) near the connecting screw (302).

5. A convenient and quick-assembly gap gauge according to claim 4, characterized in that: An assembly nut (304) is screwed onto the assembly screw (303), and an assembly ring (101) is movably installed between the assembly nuts (304).

6. The easy and quick-assembly gap gauge according to claim 1, characterized in that: The seam measuring mechanism (105) includes a seam measuring cylinder (305), a first cover (306) is screwed onto one side of the seam measuring cylinder (305), and a screw rod (401) is fixedly installed on one side of the first cover (306).

7. A convenient and quick-assembly gap gauge according to claim 6, characterized in that: The measuring cylinder (305) is screwed with a second cover (402) on the side away from the first cover (306). The measuring rod (403) is movably installed inside the second cover (402). The measuring rod (403) and the screw rod (401) are movably installed inside the first fixed screw cylinder (104).

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