Pre-tensioning tool

Abstract

The utility model discloses a pre-tensioning tool, a limit detection switch suite, a pre-tensioning assembly and an inner wire end fixing seat are sequentially arranged from front to back, the pre-tensioning assembly comprises an air cylinder, the air cylinder is provided with an air supply system, the extending end of the air cylinder is arranged forwards, the extending end of the air cylinder is connected with a force sensor through an air cylinder connecting piece, and the force sensor is connected with the air cylinder connecting piece. A sensor fixing plate is arranged on the front side of the force sensor, and a detection hanging plate is arranged on the rear side of the air cylinder. A transmission rod is connected between the sensor fixing plate and the detection hanging plate to form a frame-shaped structure, the limit detection switch kit is used for detecting whether the sensor fixing plate exceeds a set position of the sensor fixing plate or not, and the top of the detection hanging plate and the top of the inner wire end fixing seat are each provided with a notch for the end of an inner wire to be clamped in. The structure is simple, assembling is easy, operation is convenient and fast, and working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of pre-tensioning equipment technology, specifically to a pre-tensioning tooling. Background Technology

[0002] Pre-tensioning or pre-compression refers to applying a certain initial stress to a material or structure under specific conditions to achieve the expected mechanical properties or functions. Cables are important components in motorcycles, automobiles, and other vehicles, primarily used to transmit control signals and power, connecting various parts of these vehicles, including throttle cables, clutch cables, and brake cables. To ensure the production quality of cables, it is necessary to perform predictive testing or dimensional inspection of the cables' functional or usability-bearing capacity.

[0003] CN110470543B discloses a cable pre-tension testing machine. First and second tensioning mechanisms are respectively provided at both ends of a slide rail. The first tensioning mechanism includes a cable large-end clamp and a first connecting plate. The first connecting plate is provided with a first cylinder, a measuring long fixture, a first displacement sensor, and a displacement gauge stop. The first cylinder is connected to the measuring long fixture, and one side of the measuring long fixture is engaged with the displacement gauge stop. The first displacement sensor and the displacement gauge stop are arranged on the same straight line. The second tensioning mechanism has a pre-tension cylinder seat on its second connecting plate. A second cylinder is provided on one side of the pre-tension cylinder seat, and a tension / compression sensor is connected to the other end of the second cylinder. The tension / compression sensor is connected to the pre-tension block. A third cylinder is provided on one side of the pre-tension block, and a second displacement sensor is provided on the second connecting plate below the tension / compression sensor. The structure is complex, and the cable elongation needs to be controlled by a slide table. Utility Model Content

[0004] This utility model aims to solve the technical problems existing in the prior art, and innovatively proposes a pre-tensioning tooling with simple structure, simple assembly, convenient and quick operation, and improved work efficiency.

[0005] To achieve the above objectives, this utility model provides a pre-tensioning fixture, comprising a limit detection switch kit, a pre-tensioning assembly, and an inner wire end fixing seat arranged sequentially from front to back. The pre-tensioning assembly includes a cylinder equipped with an air supply system, with the extended end of the cylinder facing forward. The extended end of the cylinder is connected to a force sensor via a cylinder connector. A sensor fixing plate is provided on the front side of the force sensor, and a detection hanging plate is provided on the rear side of the cylinder. A transmission rod connects the sensor fixing plate and the detection hanging plate, forming a frame structure. The limit detection switch kit is used to detect whether the sensor fixing plate exceeds its set position. The top of the detection hanging plate and the top of the inner wire end fixing seat are both provided with notches for the inner wire end to be inserted.

[0006] The above solution also includes a base plate, on which the limit detection switch kit, pre-tensioning assembly, and inner wire end fixing seat are all fixed. The limit detection switch kit is installed on the base plate through a limit switch fixing bracket.

[0007] In the above solution: multiple inner wire end fixing seats are arranged at intervals, and all inner wire end fixing seats can be detachably connected to the base plate, which can detect inner wires of different lengths and specifications, thus improving the applicability.

[0008] In the above solution: the cylinder is equipped with a cylinder mounting base, which includes a base fixed to the bottom plate, a front upright plate and a rear upright plate fixed to the base, and the cylinder is installed between the front upright plate and the rear upright plate. The front upright plate has a through hole for the protruding end of the cylinder to pass through; the front upright plate and the rear upright plate have guide holes for the guide rod to pass through. The structure of the front upright plate and the rear upright plate is more stable and can ensure support for the guide rod.

[0009] In the above scheme: the force sensor is equipped with a display table, which can display the detected data.

[0010] In the above scheme, the notch on the detection mounting plate and the notch on the inner wire end fixing seat are at the same horizontal height. This avoids tilting and pulling the inner wire due to height differences, avoids generating component forces, and makes the detection more accurate.

[0011] In summary, the beneficial effects of this utility model are: it can limit the elongation of the inner wire pre-tensioning through the cylinder and its air supply system, and detect whether the elongation exceeds the processing requirements through the limit detection switch kit, thus meeting the range of inner wire pre-tensioning. The force sensor can detect the force generated during pre-tensioning, avoiding excessive force or failure to meet the applied force requirements. The structure is simple and assembly is easy; it only requires fixing both ends of the inner wire to the notches on the detection mounting plate and the inner wire end fixing seat, making operation convenient and quick, and improving work efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the present invention. Detailed Implementation

[0013] The present invention will be further described below with reference to embodiments and accompanying drawings:

[0014] like Figure 1As shown, a pre-tensioning fixture comprises, from front to back, a limit detection switch kit, a pre-tensioning assembly, and an inner wire end fixing seat 1. The pre-tensioning assembly includes a cylinder 12, which is equipped with an air supply system, and its extended end faces forward. The extended end of the cylinder 12 is connected to a force sensor 6 via a cylinder connector 9. A sensor fixing plate 8 is provided on the front side of the force sensor 6. The force sensor 6 is equipped with a display panel capable of displaying the detected data.

[0015] A detection mounting plate 2 is provided on the rear side of cylinder 12. A transmission rod 3 connects the sensor fixing plate 8 and the detection mounting plate 2, forming a frame structure. A limit detection switch kit is used to detect whether the sensor fixing plate 8 exceeds its set position. The limit detection switch kit is equipped with an alarm; when the sensor fixing plate 8 exceeds the set position, an alarm is triggered to ensure that the pre-stretching amount of the inner wire meets production standards. Notches for the inner wire end to engage are provided on the top of the detection mounting plate 2 and the top of the inner wire end fixing seat 1. The notches on the detection mounting plate 2 and the inner wire end fixing seat 1 are at the same horizontal height. This avoids tilting and pulling the inner wire due to height differences, prevents the generation of component forces, and makes the detection more accurate.

[0016] It also includes a base plate 13, on which the limit detection switch kit, pre-tensioning assembly, and inner wire end fixing seat 1 are all fixed. The limit detection switch kit is mounted on the base plate 13 via a limit switch fixing bracket 7. There are multiple inner wire end fixing seats 1 spaced back and forth, and all of them can be detachably connected to the base plate 13, enabling the detection of inner wires of different lengths and specifications, thus improving the applicability.

[0017] The cylinder 12 is equipped with a cylinder mounting base, which includes a base 11 fixed to the base plate 13, a front upright plate 5 fixed to the base 11, and a rear upright plate 4. The cylinder 12 is installed between the front upright plate 5 and the rear upright plate 4. The front upright plate 5 has a through hole for the protruding end of the cylinder 12 to pass through. The front upright plate 5 and the rear upright plate 4 have guide holes for the transmission rod 3 to pass through. The structure of the front upright plate 5 and the rear upright plate 4 is more stable and can ensure support for the transmission rod 3. A bearing 10 is installed in the guide hole.

Claims

1. A pre-tensioning fixture, characterized in that: The limit detection switch kit, the pre-tensioning assembly, and the inner wire end fixing seat (1) are arranged sequentially from front to back. The pre-tensioning assembly includes a cylinder (12). The cylinder (12) is equipped with an air supply system, and the extended end of the cylinder (12) is arranged facing forward. The extended end of the cylinder (12) is connected to a force sensor (6) through a cylinder connector (9). A sensor fixing plate (8) is provided on the front side of the force sensor (6), and a detection hanging plate (2) is provided on the rear side of the cylinder (12). A transmission rod (3) is connected between the sensor fixing plate (8) and the detection hanging plate (2) to form a frame structure. The limit detection switch kit is used to detect whether the sensor fixing plate (8) exceeds its set position. The top of the detection hanging plate (2) and the top of the inner wire end fixing seat (1) are both provided with notches for the inner wire end to be inserted.

2. The pre-tensioning fixture according to claim 1, characterized in that: It also includes a base plate (13), the limit detection switch kit, the pre-tensioning component and the inner wire end fixing seat (1) are all fixed on the base plate (13), and the limit detection switch kit is installed on the base plate (13) through the limit switch fixing bracket (7).

3. The pre-tensioning fixture according to claim 2, characterized in that: The inner wire end fixing seat (1) is a plurality of those arranged at intervals, and all the inner wire end fixing seats (1) can be detachably connected to the base plate (13).

4. A pre-tensioning fixture according to claim 2, characterized in that: The cylinder (12) is equipped with a cylinder mounting base, which includes a base (11) fixed to the base plate (13), a front plate (5) and a rear plate (4) fixed to the base (11). The cylinder (12) is installed between the front plate (5) and the rear plate (4). The front plate (5) is provided with a through hole for the protruding end of the cylinder (12) to pass through. The front plate (5) and the rear plate (4) are provided with guide holes for the transmission rod (3) to pass through.

5. A pre-tensioning fixture according to claim 4, characterized in that: The force sensor (6) is equipped with a display.

6. A pre-tensioning fixture according to claim 1, characterized in that: The notch of the detection mounting plate (2) and the notch of the inner wire end fixing seat (1) are at the same horizontal height.

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