Long-stroke guide structure
By combining a guide ring and bearing components, the problem of swaying of the measuring rod in long-stroke displacement sensors was solved, achieving higher measurement accuracy and reliability.
Patent Information
- Application Number
- CN202520668761.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-04-09
AI Technical Summary
The measuring rod of existing long-stroke displacement sensors is prone to swaying during long strokes, leading to deviations in measurement results and reducing measurement accuracy and reliability.
The system employs a combination structure of guide ring and bearing components. The elastic element pushes the shaft to support it together with the guide ring, increasing the central stability of the shaft during sliding. The pin and sliding hole structure prevents the shaft from rotating, thus improving measurement accuracy.
This effectively avoids the swaying of the measuring rod, improving the measurement accuracy and reliability of the long-stroke displacement sensor.
Smart Images
Figure CN223925722U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of measuring instruments, and in particular to a long-stroke guide structure. Background Technology
[0002] Displacement sensors, as crucial devices capable of accurately measuring changes in object displacement, are widely used in numerous fields such as industrial production, aerospace, and automotive manufacturing. In practical applications, precise measurement of large displacements is often required, necessitating displacement sensors with long-stroke measurement capabilities. In long-stroke displacement sensors, the measuring rod is the key component for achieving displacement measurement.
[0003] However, existing long-stroke displacement sensors have the following shortcomings in practical use: as the measurement stroke increases, the length of the measuring rod also increases accordingly. When the measuring rod is too long, the most prominent problem is that it is prone to swaying. The swaying of the measuring rod will cause deviations in the measurement results, reducing the measurement accuracy and reliability of the displacement sensor. In view of this, the long-stroke guiding structure of this application is proposed. Utility Model Content
[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a long-stroke guide structure that reduces the swing of the measuring rod to improve the measurement accuracy and reliability of the sensor.
[0005] The objective of this utility model is achieved through the following technical solution:
[0006] A long-stroke guide structure, comprising:
[0007] A tube body having a through hole and a guide ring coaxially located within the through hole; and
[0008] A measuring assembly includes a shaft, a sleeve, an elastic element, and a bearing element. The sleeve is disposed on the end of the tube body away from the guide ring. The bearing element slides within the sleeve. The shaft is integrally formed with a retaining ring, which slides coaxially within the through hole. Both ends of the shaft pass through the guide ring and the bearing element, respectively. The elastic element is sleeved on the shaft, and both ends of the elastic element are adapted to pass through the retaining ring and the guide ring, so that the end of the shaft away from the guide ring extends from the end of the sleeve away from the tube body.
[0009] Optionally, the inner diameter of the guide ring is the same as the diameter of the shaft.
[0010] Optionally, the inner diameter of the bearing component is the same as the diameter of the shaft.
[0011] Optionally, the diameter of the retaining ring is larger than the diameter of the shaft, and the diameter of the retaining ring is smaller than the diameter of the through hole.
[0012] Optionally, the outer diameter of the bearing component is the same as the inner diameter of the sleeve.
[0013] Optionally, the tube body is further provided with a sliding hole, which is opened along the axial direction of the through hole and penetrates the inner and outer walls of the tube body. The measuring component also includes a pin, one end of which is located on the end of the shaft away from the sleeve, and the other end of which extends into the sliding hole.
[0014] Optionally, the shaft has a flat portion extending along the axis of the shaft, and the flat portion is located on the side of the retaining ring away from the sleeve.
[0015] Optionally, the measuring component further includes a sensing plate disposed on the planar portion.
[0016] Optionally, the measuring assembly further includes two limiting rings, which are respectively disposed at both ends of the sleeve, and the two limiting rings are used to block the bearing component.
[0017] Compared with the prior art, the present invention has at least the following advantages:
[0018] The long-stroke guide structure of this invention, when the elastic element pushes the shaft out from one end of the sleeve, causes the shaft to slide from one end of the sleeve near the tube body to the other end, increasing the distance between the bearing and the guide ring. This increases the distance between the two ends of the shaft, allowing them to support each other. This increased distance enhances the central stability of the shaft during sliding, preventing shaft swaying and thus improving measurement accuracy and reliability. Secondly, the anti-rotation tube has a sliding hole along the axis of the through hole, and one end of a pin on the shaft extends into this hole. The pin follows the shaft's movement, allowing the other end to slide along the direction of the sliding hole, preventing the shaft from rotating around its axis and further improving measurement accuracy. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the long-stroke guide structure according to one embodiment of the present invention;
[0021] Figure 2 This is a top view schematic diagram of a long-stroke guide structure according to one embodiment of the present invention;
[0022] Figure 3 This is a top view cross-sectional diagram of a long-stroke guide structure according to one embodiment of the present invention;
[0023] Figure 4 This is a front view of a cross-sectional view of a long-stroke guide structure according to one embodiment of the present invention.
[0024] Figure 5 for Figure 4 A magnified schematic diagram of the structure of part A in the diagram;
[0025] Figure 6 for Figure 4 A magnified schematic diagram of the partial structure of B in the diagram;
[0026] Figure 7 This is a schematic diagram of the right-side cross-sectional structure of a long-stroke guide structure according to one embodiment of the present invention;
[0027] Figure 8 for Figure 7 A magnified schematic diagram of the structure of C.
[0028] Explanation of reference numerals in the attached figures:
[0029] 1. Long-stroke guide structure; 10. Tube body; 11. Through hole; 12. Guide ring; 13. Sliding hole; 111. Sliding tube; 112. Anti-rotation tube; 20. Measuring assembly; 21. Shaft; 211. Snap ring; 212. Flat part; 22. Sleeve; 221. Through hole; 23. Elastic element; 24. Bearing component; 25. Pin; 26. Sensing plate; 27. Limiting ring. Detailed Implementation
[0030] To facilitate understanding of this utility model, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model.
[0031] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0033] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.
[0034] like Figures 1 to 8 As shown, in one embodiment, a long-stroke guide structure 1 includes a tube body 10 and a measuring component 20. The tube body 10 has a through hole 11 and a guide ring 12. The guide ring 12 is coaxially located in the through hole 11. The measuring component 20 includes a shaft 21, a sleeve 22, an elastic element 23, and a bearing element 24. The sleeve 22 is located on the end of the tube body 10 away from the guide ring 12. The bearing element 24 slides in the sleeve 22. The shaft 21 is integrally formed with a retaining ring 211. The retaining ring 211 slides coaxially in the through hole 11, and both ends of the shaft 21 pass through the guide ring 12 and the bearing element 24, respectively. The elastic element 23 is sleeved on the shaft 21. Both ends of the elastic element 23 are adapted to pass through the retaining ring 211 and the guide ring 12, so that the end of the shaft 21 away from the guide ring 12 extends out from the end of the sleeve 22 away from the tube body 10.
[0035] It should be noted that the tube body 10 has a cylindrical structure and a through hole 11, which extends through both ends of the tube body 10. The guide ring 12 has an annular structure and is located at one end of the tube body 10, coaxially connected to the through hole 11. Furthermore, the sleeve 22 also has a cylindrical structure and a through hole 221, which extends through both ends of the sleeve 22. One end of the sleeve 22 is located at the end of the tube body 10 away from the guide ring 12, and the outer diameter of the sleeve 22 is the same as the diameter of the through hole 11. For example, one end of the sleeve 22 is screwed to the tube body 10, or, for example, one end of the sleeve 22 is glued to the tube body 10, so that the through hole 221 is coaxially connected to the through hole 11. Furthermore, the outer diameter of the bearing component 24 is consistent with the diameter of the through hole 221, so that the bearing component 24 can slide comfortably inside the sleeve 22.
[0036] It should be noted that a retaining ring 211 is integrally formed at the middle position of the shaft 21. The retaining ring 211 is arranged along the circumference of the shaft 21, and the diameter of the retaining ring 211 is larger than the diameter of the shaft 21, causing the retaining ring 211 to protrude relative to the circumference of the shaft 21. Furthermore, the outer diameter of the retaining ring 211 is smaller than the diameter of the through hole 11. When the retaining ring 211 slides coaxially within the through hole 11, both ends of the shaft 21 pass through the bearing component 24 and the guide ring 12, respectively, with the two ends of the shaft 21 extending out from the ends of the bearing component 24 and the guide ring 12 that are furthest apart from each other. In this way, the shaft 21 slides coaxially along the through hole 11, preventing the two ends of the shaft 21 from shifting during sliding, which would lead to deviations in the measurement results.
[0037] like Figures 4 to 8 As shown, in one embodiment, the elastic element 23 is a spring structure. The elastic element 23 is sleeved on the shaft 21, and the elastic element 23 is located on the side of the retaining ring 211 facing the guide ring 12, so that the two ends of the elastic element 23 push against the retaining ring 211 and the guide ring 12 respectively, thereby causing the end of the shaft 21 away from the guide ring 12 to extend out from the sleeve 22 for measurement.
[0038] It should be noted that the bearing component 24 slides within the sleeve 22. The inner diameter of the bearing component 24 is the same as the diameter of the shaft 21, allowing the shaft 21 to fit comfortably through the bearing component 24. For example, the bearing component 24 is a ball bushing. When the elastic element 23 pushes the shaft 21 out from one end of the sleeve 22, the shaft 21 can drive the bearing component 24 to slide away from one end of the sleeve 22 near the tube body 10 to the other end. This increases the distance between the bearing component 24 and the guide ring 12, thereby increasing the distance between the two ends of the shaft 21 jointly supported by the bearing component 24 and the guide ring 12. As the distance between the bearing component 24 and the guide ring 12 jointly supporting the shaft 21 increases, the central stability of the shaft 21 during sliding is increased, thereby improving measurement accuracy and reliability. When the shaft 21 comes into contact with the object being detected, causing the retaining ring 211 to slide towards one end of the guide ring 12 to compress the elastic element 23, the end of the shaft 21 closest to the guide ring 12 will extend from the side of the guide ring 12 away from the sleeve 22, while the end of the shaft 21 away from the guide ring 12 will penetrate deep into the sleeve 22. At this time, the shaft 21 simultaneously drives the bearing 24 to slide from the end of the sleeve 22 away from the guide ring 12 to the other end, keeping the bearing 24 sleeved on the shaft 21 to support it. This prevents the end plate of the shaft 21 from disengaging from the bearing 24 when it approaches the connection point between the sleeve 22 and the tube body 10.
[0039] like Figures 1 to 2 , Figures 4 to 5 , Figures 7 to 8 As shown, in one embodiment, the tube body 10 is further provided with a sliding hole 13. The sliding hole 13 is opened along the axial direction of the through hole 11 and penetrates the inner side wall and the outer side wall of the tube body 10. The measuring component 20 also includes a pin 25. One end of the pin 25 is set on the end of the shaft 21 away from the sleeve 22, and the other end of the pin 25 extends into the sliding hole 13.
[0040] It should be noted that the guide ring 12 is located inside the through hole 11, and the guide ring 12 divides the tube body 10 into a sliding tube 111 and an anti-rotation tube 112. The anti-rotation tube 112 is coaxially disposed on the sliding tube 111, one end of the through hole 11 is located inside the sliding tube 111, and the other end of the through hole 11 is located inside the anti-rotation tube 112. Furthermore, a sliding hole 13 is formed on the anti-rotation tube 112. For example, the sliding hole 13 has an oblong hole structure, and the sliding hole 13 is formed along the axial direction of the through hole 11, and the axial direction of the sliding hole 13 is perpendicular to the axial direction of the through hole 11. Furthermore, the measuring assembly 20 also includes a pin 25, one end of which is disposed on the end of the shaft 21 away from the sleeve 22, and the other end of which extends into the sliding hole 13. Thus, when the elastic element 23 pushes the retaining ring 211 to drive the shaft 21 to slide in the axial direction of the through hole 11, the shaft 21 will drive the pin 25 to slide along the opening direction of the sliding hole 13. Furthermore, the width of the sliding hole 13 is consistent with the diameter of the pin 25, so that the shaft 21 cannot rotate with the axis of the through hole 11 as the center.
[0041] like Figure 7 As shown, in one embodiment, a flat portion 212 is provided on the shaft 21. The flat portion 212 is provided along the axial direction of the shaft 21 and is located on the side of the retaining ring 211 away from the sleeve 22.
[0042] It should be noted that the retaining ring 211 has a flat portion 212 on the shaft 21 facing the guide ring 12, making the radial cross-section of the shaft 21 semi-circular. In one embodiment, the arc length of the semi-circular structure of the radial cross-section of the shaft 21 is greater than the arc length of a standard semicircle. This creates a gap between the shaft 21 and the inner diameter of the guide ring 12 that tends towards a clearance groove. Simultaneously, the semi-circular cross-section of the shaft 21, or the arc length of the semi-circular cross-section being greater than the arc length of a standard semicircle, allows the shaft 21's axis to slide along the axis of the guide ring 12 while simultaneously creating a clearance gap, thus preventing the shaft 21 from wobbling and causing measurement deviations.
[0043] like Figure 1 , Figures 7 to 8 As shown, in one embodiment, the measuring component 20 further includes a sensing plate 26, which is disposed on the planar portion 212.
[0044] It should be noted that the sensing plate 26 is made of a material structure that can be sensed by the measured component, for example, the sensing plate 26 is an iron plate structure. The sensing plate 26 is disposed on the flat part 212, and the width of the sensing plate 26 is smaller than the width of the flat part 212, so that when the shaft 21 passes through the guide ring 12, the shaft 21 can drive the sensing plate 26 through the guide ring 12, and drive the sensing plate 26 from the sliding tube 111 to the anti-rotation tube 112, so that the sensing plate 26 can be sensed by the measured component.
[0045] like Figure 6 As shown, in one embodiment, the measuring component 20 further includes two limiting rings 27, which are respectively disposed at both ends of the sleeve 22. The two limiting rings 27 are used to block the bearing component 24.
[0046] It should be noted that the two limiting rings 27 are respectively set on the inner sidewalls of both ends of the sleeve 22, so that the bearing component 24 can only slide between the two ends of the sleeve 22, so as to prevent the bearing component 24 from sliding out of the sleeve 22.
[0047] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A long-stroke guide structure, characterized in that, include: A tube body having a through hole and a guide ring coaxially located within the through hole; and A measuring assembly includes a shaft, a sleeve, an elastic element, and a bearing element. The sleeve is disposed on the end of the tube body away from the guide ring. The bearing element slides within the sleeve. The shaft is integrally formed with a retaining ring, which slides coaxially within the through hole. Both ends of the shaft pass through the guide ring and the bearing element, respectively. The elastic element is sleeved on the shaft, and both ends of the elastic element are adapted to pass through the retaining ring and the guide ring, so that the end of the shaft away from the guide ring extends from the end of the sleeve away from the tube body.
2. The long-stroke guide structure according to claim 1, characterized in that, The inner diameter of the guide ring is the same as the diameter of the shaft.
3. The long-stroke guide structure according to claim 2, characterized in that, The inner diameter of the bearing component is the same as the diameter of the shaft.
4. The long-stroke guide structure according to claim 3, characterized in that, The diameter of the retaining ring is larger than the diameter of the shaft, and the diameter of the retaining ring is smaller than the diameter of the through hole.
5. The long-stroke guide structure according to claim 3, characterized in that, The outer diameter of the bearing component is the same as the inner diameter of the sleeve.
6. The long-stroke guide structure according to claim 5, characterized in that, The tube body is also provided with a sliding hole, which is opened along the axial direction of the through hole and penetrates the inner and outer walls of the tube body. The measuring component also includes a pin, one end of which is located on the end of the shaft away from the sleeve, and the other end of which extends into the sliding hole.
7. The long-stroke guide structure according to claim 6, characterized in that, The shaft has a flat portion extending along its axial direction, and the flat portion is located on the side of the retaining ring away from the sleeve.
8. The long-stroke guide structure according to claim 7, characterized in that, The measuring assembly also includes a sensing plate disposed on the planar portion.
9. The long-stroke guide structure according to claim 7, characterized in that, The measuring assembly also includes two limiting rings, which are respectively disposed at both ends of the sleeve and are used to block the bearing component.