Positioning device for rigidity measurement of large-rigidity spring
By designing a positioning device for a large stiffness spring, the problem of unstable measurement results caused by position differences when the spring detects stiffness is solved, and higher measurement accuracy and data stability are achieved.
Patent Information
- Application Number
- CN202421719509.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-07-19
AI Technical Summary
When detecting stiffness, the measurement results are greatly different due to different placement positions of the large stiffness spring, and the repeated measurement results are 300-600 N/mm.
A positioning device is designed, including a positioning block and a semicircular positioning groove. Through the design of fixing threaded holes and feed openings, the spring is placed in a consistent position every time, thereby improving the measurement accuracy.
By using the positioning device, the fluctuations in the test data are reduced, the measurement accuracy and accuracy are improved, and the data fluctuations are less than ±10 N/mm.
Smart Images
Figure CN222812538U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of mechanical property detection of vibration isolation springs, in particular to a positioning device for measuring the stiffness of a large-rigidity spring. Background Art
[0002] Vibration isolation springs, as an important vibration isolation component, are mainly used to isolate and reduce the vibration generated by mechanical equipment during operation, so as to protect the equipment from vibration damage and improve the stability and comfort of equipment operation. Rail transit vibration isolation springs and construction vibration isolation springs are basically springs with relatively high stiffness, usually designed at around 6KN / mm. Stiffness is the key performance point of this type of spring.
[0003] When measuring the stiffness of this type of spring on a spring performance testing machine, different placement positions lead to significant differences in the measurement results. Repeated placement and stiffness measurement of the same spring can result in a difference of 300-600 N / mm. Summary of the invention
[0004] In order to solve the above technical problems, the utility model provides a positioning device for measuring spring stiffness, with the aim of solving the problem that when testing the stiffness of a large stiffness spring, the repeated placement positions are very different, resulting in large differences in the measurement results. After the spring is positioned and measured, the stiffness experimental data fluctuates little and the measurement accuracy is greatly improved.
[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a positioning device for measuring the stiffness of a large-rigidity spring, comprising a positioning block, which is fixedly mounted on a spring performance testing machine, a semicircular positioning groove is opened at the center of the positioning block, the notch side of the positioning groove is connected to a feed opening, and the feed opening gradually expands outward from the notch side of the positioning groove.
[0006] At least two fixing threaded holes are arranged on the positioning block away from the positioning groove, and the distance between each fixing threaded hole and the center of the positioning block is the same.
[0007] The diameter of the positioning groove is the same as the outer diameter of the spring.
[0008] A positioning corner is provided between the positioning groove and the feed opening.
[0009] The feed opening and the outer peripheral surface of the positioning block are chamfered for transition.
[0010] The beneficial effect of the utility model is that when the stiffness test of the vibration isolation spring is carried out, the fixing block is first fixed with screws to ensure that the position of the spring is the same each time, and then the spring is placed in the positioning groove and fixed, and then the stiffness is tested with a spring performance testing machine, and then the placement and test are repeated, and it is necessary to ensure that the position where the tip points to must be consistent each time the spring is placed, so that the fluctuation of the test data can be reduced and the measurement precision and accuracy can be improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] The utility model is further described below in conjunction with the accompanying drawings:
[0012] Figure 1 The utility model is a schematic diagram of a positioning device for measuring the stiffness of a large-rigidity spring.
[0013] In the figure: 1, positioning block; 11, positioning groove; 12, feed opening; 13, fixing threaded hole; 14, positioning corner. DETAILED DESCRIPTION
[0014] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Example
[0015] like Figure 1 As shown, the utility model is a positioning device for measuring the stiffness of a large-rigidity spring: it includes a positioning block 1, the positioning block 1 is fixedly installed on a spring performance testing machine, a semicircular positioning groove 11 is opened in the center of the positioning block 1, the notch side of the positioning groove 11 is connected to a feed opening 12, and the feed opening 12 gradually expands outward from the notch side of the positioning groove 11.
[0016] Specifically, at least two fixed threaded holes 13 are provided on the positioning block 1 away from the positioning groove 11, and the distance between each fixed threaded hole 13 and the center of the positioning block 1 is the same. The diameter of the positioning groove 11 is the same as the outer diameter of the spring. When the stiffness test of the vibration isolation spring is performed, the screws are first inserted into the fixed threaded holes 13 to fix the positioning block 1. It can be understood that three fixed threaded holes are provided, two of which are arranged on the horizontal line of the center of the positioning block 1, and the other is arranged on the center line perpendicular to the horizontal line. The distance between each fixed threaded hole 13 and the center of the positioning block 1 is the same, so that the positioning block 1 is fixed while each screw is subjected to uniform force, which is also conducive to the convenient processing of the fixed threaded holes 13. Place the vibration isolation spring in the positioning groove 11 along the feed opening 12. The feed opening 12 and the outer peripheral surface of the positioning block 1 are chamfered to prevent scratches during use. Since the diameter of the positioning groove 11 is the same as the outer diameter of the spring, it is ensured that the spring will not shake in the positioning groove 11. Then use a spring performance tester to press down the spring to test the spring stiffness. Repeat the above steps. It must be ensured that the position pointed by the tip of the spring must be consistent each time the spring is placed. Specifically, a positioning corner 14 is provided between the positioning groove 11 and the feed opening 12. Align the tip of the spring with the positioning corner 14 each time it is placed. After using the above positioning device, the measured spring stiffness value data is relatively stable, the test data has good reproducibility, the data fluctuates within ±10 N / mm, the measurement accuracy is greatly improved, and the stability of the spring stiffness measurement data is effectively improved.
[0017] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.
Claims
1. A positioning device for measuring the stiffness of a high-rigidity spring, comprising a positioning block (1), the positioning block (1) being fixedly mounted on a spring performance testing machine, characterized in that: A semicircular positioning groove (11) is provided at the center of the positioning block (1), the notch side of the positioning groove (11) is connected to the feed opening (12), and the feed opening (12) gradually expands outwards from the notch side of the positioning groove (11).
2. A positioning device for measuring the stiffness of a large-rigidity spring according to claim 1, characterized in that: At least two fixing threaded holes (13) are provided on the positioning block (1) away from the positioning groove (11), and the distance between each fixing threaded hole (13) and the center of the positioning block (1) is the same.
3. A positioning device for measuring the stiffness of a large-rigidity spring according to claim 1, characterized in that: The diameter of the positioning groove (11) is the same as the outer diameter of the spring.
4. A positioning device for measuring the stiffness of a large-rigidity spring according to claim 1, characterized in that: A positioning corner (14) is provided between the positioning groove (11) and the feed opening (12).
5. A positioning device for measuring the stiffness of a large-rigidity spring according to claim 1, characterized in that: The feed opening (12) and the outer peripheral surface of the positioning block (1) are chamfered for transition.