Mechanical spring hand for measuring the flatness of a rail
By designing a flexible connection structure for the mechanical spring hand, the problem of insufficient buffering and shock absorption in existing devices was solved, enabling low-cost and efficient rail straightness measurement, and improving measurement accuracy and equipment reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA RAILWAY RAILWAY TECH SERVICE GRP CO LTD
- Filing Date
- 2025-08-04
- Publication Date
- 2026-07-24
AI Technical Summary
Existing rail straightness measuring devices lack buffering and shock absorption functions, are easily damaged, and have complex structures and high maintenance costs, making them difficult to promote on a large scale.
Design a mechanical spring hand that includes a robotic arm, a rotating arm, a spring hand assembly, and a flatness measuring instrument. A flexible connection between the robotic arm and the flatness measuring instrument is achieved through multiple sets of spring connectors, providing a buffering and shock absorption function to reduce the risk of equipment damage.
It enables low-cost and efficient rail straightness measurement, improves measurement accuracy and efficiency, avoids the impact of equipment collisions and vibrations on measurement results, and reduces maintenance costs.
Smart Images
Figure CN224544580U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rail transit, specifically a mechanical spring hand for measuring the straightness of rails. Background Technology
[0002] Rail straightness measurement refers to the detection of longitudinal and transverse geometric deviations on the rail surface to ensure high track smoothness, improve the stability and safety of train operation. Rail straightness directly affects the comfort of train ride, wheel-rail contact condition, and service life of track components. Regular inspection and adjustment of rail straightness is an important part of rail transit operation and maintenance.
[0003] Existing flatness measuring devices mostly use rigid robotic arms or fixed connections, which lack buffering and shock absorption functions. The devices will be subject to obvious collisions and are easily damaged. They use gear or chain drives for deceleration, which are complex in structure and have high maintenance costs. On the other hand, measuring devices based on biomimetic technology are expensive to manufacture and difficult to promote and apply on a large scale. Utility Model Content
[0004] The purpose of this invention is to provide a mechanical spring hand for measuring the straightness of rails, 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 mechanical spring hand for measuring the straightness of rails includes a mechanical arm and a straightness measuring instrument. One end of the mechanical arm is provided with a rotating arm, and a spring hand assembly for mounting the straightness measuring instrument is provided on the rotating arm. The spring hand assembly includes a connecting plate and a spring connector, and the connecting plate is fixedly mounted on the rotating arm.
[0007] A spring connector is provided between the connecting plate and the straightness measuring instrument. There are at least two sets of spring connectors. Each set of spring connectors includes a spring and two spring seats. The two spring seats are respectively installed on the connecting plate and the straightness measuring instrument. The two ends of the spring are respectively connected to the two spring seats.
[0008] Based on the above technical solutions, this utility model also provides the following optional technical solutions:
[0009] In one alternative: the connecting plate has multiple threaded holes at its center, and the connecting plate is fixedly connected to the rotating arm by bolts inside the threaded holes.
[0010] In one alternative: the spring seat has multiple mounting holes, and the spring seat is connected to the straightness measuring instrument through bolts inside the internal mounting holes.
[0011] In one alternative: the bottom of the robotic arm is provided with a base, and the joint of the robotic arm is provided with a rotary motor to provide rotational power for the robotic arm.
[0012] In one alternative: an electrical control box is provided on the outer wall of the base.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0014] The mechanical spring hand used for rail straightness measurement has a simple structure, low cost, and good shock absorption performance. It can achieve a flexible connection between the robotic arm and the straightness measuring instrument, improving measurement efficiency and accuracy. Through the flexible connection structure of the spring hand, a buffer transition is formed between the robotic arm and the straightness measuring instrument, ensuring that the straightness measuring instrument can move with the rail, effectively avoiding the impact of impact and vibration on the measurement results. Compared with gear reduction or bionic flexible mechanisms, it has a lower manufacturing cost and is suitable for the rapid and efficient straightness detection needs in the rail transit field, achieving fast and convenient measurement while reducing damage to equipment. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of a mechanical spring hand used for measuring the straightness of rails.
[0016] Figure 2 This is a schematic diagram of the base of a mechanical spring hand used for measuring the straightness of rails.
[0017] Figure 3 This is a schematic diagram of the mechanical arm in a mechanical spring hand used for measuring the straightness of rails.
[0018] Figure 4 This is a schematic diagram of the connecting disc in a mechanical spring hand used for measuring the straightness of rails.
[0019] Figure 5 This is a schematic diagram of the spring seat in a mechanical spring hand used for measuring the straightness of rails.
[0020] Figure label annotations: 1-robotic arm, 2-base, 3-rotating arm, 4-threaded hole, 5-connecting plate, 6-spring, 7-spring seat, 8-flatness measuring instrument, 9-mounting hole, 10-rotating motor, 11-electrical control box. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. In the drawings and description, similar or identical parts are referred to by the same reference numerals, and in practical applications, the shape, thickness, or height of each component may be enlarged or reduced. The embodiments listed in this utility model are merely illustrative and not intended to limit the scope of this utility model. Any obvious modifications or changes made to this utility model do not depart from its spirit and scope.
[0022] In one embodiment, such as Figure 1-5 As shown, a mechanical spring hand for measuring the straightness of rails includes a mechanical arm 1 and a straightness measuring instrument 8. A rotating arm 3 is rotatably mounted on one end of the mechanical arm 1. A spring hand assembly for mounting the straightness measuring instrument 8 is mounted on the rotating arm 3. The spring hand assembly includes a connecting plate 5 and a spring connector. The connecting plate 5 is fixedly mounted on the rotating arm 3.
[0023] A spring connector is provided between the connecting plate 5 and the straightness measuring instrument 8. There are at least two sets of spring connectors. Each set of spring connectors includes a spring 6 and two spring seats 7. The two spring seats 7 are respectively installed on the connecting plate 5 and the straightness measuring instrument 8. The two ends of the spring 6 are respectively connected to the two spring seats 7.
[0024] The mechanical spring hand used for measuring rail straightness consists of a spring 6, a spring seat 7, and a connecting plate 5. Multiple sets of spring connecting units form a flexible system, allowing the straightness measuring instrument 8 to adjust the contact pressure according to the rail profile. The spring 6 has a certain stiffness in the lateral, longitudinal, and vertical directions. In addition to applying lateral, longitudinal, and vertical pressure, it can also apply torsional constraints, effectively realizing the flexible connection between the equipment and the mechanical arm 1. As an example, the left, right, up, and down positions of the various components shown in the attached figure are only one arrangement method. The specific positions are set according to specific needs.
[0025] In one embodiment, such as Figure 5 As shown, the connecting plate 5 has multiple threaded holes 4 at its center, and the connecting plate 5 is fixedly connected to the rotating arm 3 through bolts inside the threaded holes 4.
[0026] In one embodiment, such as Figure 4-5 As shown, the spring seat 7 has multiple mounting holes 9, and the spring seat 7 is connected to the flatness measuring instrument 8 through bolts inside the internal mounting holes 9.
[0027] In one embodiment, such as Figure 1-2As shown, a base 2 is provided at the bottom of the robotic arm 1, and a rotating motor 10 is provided at the joint of the robotic arm 1 to provide rotational power for the robotic arm 1. An electrical control box 11 is provided on the outer wall of the base 2.
[0028] The above embodiments of this utility model provide a mechanical spring hand for measuring the straightness of rails. The spring hand is used to connect the robotic arm 1 and the straightness measuring instrument 8. The spring hand will reduce the positioning accuracy to a certain extent, requiring the robotic arm 1 to meet the movement and positioning requirements. On the other hand, the straightness measuring instrument 8 needs to have the characteristic of moving with the object being measured (rail). The spring hand is used to mount the straightness measuring instrument 8, and the measurement accuracy is achieved by the straightness measuring instrument 8. The spring 8 has a certain stiffness in the horizontal, vertical and longitudinal directions and a constraint on torsion, which can keep the measuring instrument stably in the position to be measured on the rail. At the same time, the flexibility of the spring hand can make the measuring device move flexibly with the rail, effectively avoiding the vibration and collision generated during the measurement process, and ensuring the accuracy and reliability of the measurement results.
[0029] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.
Claims
1. A mechanical spring hand for measuring the straightness of rails, comprising a mechanical arm and a straightness measuring instrument, characterized in that, The robotic arm has a rotating arm at one end, and a spring hand assembly for mounting a flatness measuring instrument is provided on the rotating arm. The spring hand assembly includes a connecting plate and a spring connector, and the connecting plate is fixedly mounted on the rotating arm. A spring connector is provided between the connecting plate and the straightness measuring instrument. There are at least two sets of spring connectors. Each set of spring connectors includes a spring and two spring seats. The two spring seats are respectively installed on the connecting plate and the straightness measuring instrument. The two ends of the spring are respectively connected to the two spring seats.
2. The mechanical spring hand for measuring rail straightness according to claim 1, characterized in that, The connecting plate has multiple threaded holes at its center, and the connecting plate is fixedly connected to the rotating arm through bolts inside the threaded holes.
3. The mechanical spring hand for measuring rail straightness according to claim 2, characterized in that, The spring seat has multiple mounting holes, and the spring seat is connected to the straightness measuring instrument through bolts inside the internal mounting holes.
4. The mechanical spring hand for measuring rail straightness according to claim 1, characterized in that, The robotic arm has a base at its bottom and a rotating motor at its joints to provide rotational power.
5. The mechanical spring hand for measuring rail straightness according to claim 4, characterized in that, An electrical control box is installed on the outer wall of the base.