Integrated displacement sensor

Abstract

The utility model aims at providing an integrated displacement sensor, including shell and anti -rotation subassembly, is equipped with recess on the shell, anti -rotation subassembly includes side block, crosspiece, elastic part and measurement piece, measurement piece is worn in the shell, and one end of measurement piece is located in recess, side block is detachably arranged on one inner side wall of recess, is equipped with U groove on the side block, one end of crosspiece is perpendicularly arranged on measurement piece, the other end of crosspiece and U groove adapt the sliding joint of card, when measurement piece relative to shell slide, to make measurement piece drive crosspiece and U groove sliding joint, the both ends of elastic part are connected with the inner side wall of recess and crosspiece respectively, and elastic part is used for driving measurement piece to slide to initial position. Thus, to reduce hardware cost, improve the life and stability.

Description

Technical Field

[0001] This utility model relates to the technical field of measuring instruments, and in particular to an integrated displacement sensor. Background Technology

[0002] Displacement sensors are widely used in industrial automation, precision machining, and other fields. Their core function is to convert displacement into an electrical signal through the relative sliding of a measuring rod and a housing. The measuring rod and housing are usually fitted with a clearance fit to ensure smooth sliding, but this can easily cause the measuring rod to rotate circumferentially (self-rotation) during sliding, interfering with the internal signal conversion mechanism and reducing measurement accuracy. Therefore, an anti-rotation structure is needed to constrain its circumferential degree of freedom. Currently, displacement sensors on the market typically use an oblong hole in the side wall of the housing along the sliding direction of the measuring rod, and a transverse crossbar (or pin) is installed in the inner cavity of the measuring rod. The crossbar extends into the oblong hole and maintains a slidable, precise fit, with the hole wall acting as a limit to prevent the measuring rod from rotating.

[0003] However, existing displacement sensors have the following shortcomings in practical use: First, the sliding stroke of the measuring rod is strictly limited by the major axis dimension of the oblong hole. Since the crossbar must always slide within the oblong hole to prevent rotation, the maximum sliding distance of the measuring rod depends entirely on the length of the oblong hole along the axial direction (i.e., the major axis dimension). When the application requires a longer measuring stroke, the major axis length of the oblong hole must be increased accordingly. This forces the axial dimension of the sensor housing to increase, which not only makes the overall size of the sensor larger and difficult to adapt to the installation requirements of confined spaces (such as compact hydraulic equipment and small precision instruments), but also increases the hardware cost due to the increased material usage of the housing. Second, increasing the length of the oblong hole significantly reduces the structural strength of the housing; that is, the oblong hole itself will compromise the integrity of the housing. The larger the major axis dimension, the smaller the effective bearing area of ​​the housing sidewalls. When subjected to external impacts, vibrations, or the sliding impact force of the measuring rod, the housing is prone to stress concentration at the edge of the oblong hole, causing cracking, deformation, and other problems, thus affecting the service life and stability of the sensor. In view of this, the integrated displacement sensor of this application is proposed. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an integrated displacement sensor that can flexibly meet the anti-rotation requirements of different measurement formations, and can reduce hardware costs, improve service life and stability.

[0005] The objective of this utility model is achieved through the following technical solution: An integrated location sensor includes: The outer casing, wherein a groove is formed on the outer casing; and An anti-rotation assembly includes a side block, a crossbar, an elastic element, and a measuring element. The measuring element is inserted into the housing, with one end located within the groove. The side block is detachably mounted on an inner wall of the groove and has a U-shaped groove. One end of the crossbar is vertically mounted on the measuring element, and the other end of the crossbar is slidably engaged with the U-shaped groove. When the measuring element slides relative to the housing, it causes the crossbar to slide and engage with the U-shaped groove. Both ends of the elastic element are connected to the inner wall of the groove and the crossbar, respectively, and the elastic element is used to drive the measuring element to slide to its initial position.

[0006] Optionally, the measuring element includes a slide block, a slide rod, and a slide cylinder. The slide cylinder is disposed on the outer casing, the slide rod is coaxially inserted inside the slide cylinder, the slide block is disposed on the slide rod, and one end of the crossbar is vertically disposed on one side of the slide block.

[0007] Optionally, the measuring component further includes a cylinder, which is coaxially sleeved on the slide rod, and the inner and outer side walls of the cylinder slide against the outer side wall of the slide rod and the inner side wall of the cylinder, respectively.

[0008] Optionally, the measuring element further includes a soft rubber sealing tube, which is sleeved on the slide rod, and both ends of the soft rubber sealing tube are respectively sealed to the ends of the slide cylinder and the slide rod.

[0009] Optionally, the measuring component further includes a plastic limiting block and a soft rubber limiting ring. The plastic limiting block is disposed in the groove, and the soft rubber limiting ring is sleeved on the slide rod. When the slide block slides to one end, one side of the slide block abuts against the plastic limiting block; when the slide block slides to the other end, the other side of the slide block abuts against the soft rubber limiting ring.

[0010] Optionally, the measuring component further includes a circuit board and a sensing plate, the sensing plate being disposed on the slide, the circuit board being disposed on the housing, and the circuit board and the sensing plate being parallel to each other and spaced apart.

[0011] Optionally, the housing has a light guide hole, and the measuring component further includes a light guide post, which is sealed inside the light guide hole and is used to transmit the optical signal on the circuit board to the outside.

[0012] Optionally, the integrated displacement sensor further includes a cover plate and a sealing ring, the cover plate being disposed on the housing, and the sealing ring being used to seal the gap between the housing and the cover plate.

[0013] Compared with the prior art, the present invention has at least the following advantages: This utility model's integrated displacement sensor uses a U-shaped groove on the side block to slide and engage with a crossbar, thus limiting the rotation of the measuring component and retaining only the sliding function, significantly improving measurement accuracy. The sliding stroke of the measuring component can be adjusted by replacing side blocks of different lengths, making it flexible and adaptable to various scenarios and easy to operate. At the same time, it avoids opening waist-shaped holes on the housing that would affect its overall structural strength. In this way, hardware costs are reduced, service life is improved, and stability is enhanced. Attached Figure Description

[0014] 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.

[0015] Figure 1 This is a schematic diagram of the structure of an integrated displacement sensor according to one embodiment of the present invention; Figure 2 This is a structural schematic diagram of the side block mounting position according to one embodiment of the present invention; Figure 3 This is a partial structural cross-sectional schematic diagram of an integrated displacement sensor according to one embodiment of the present invention; Figure 4 This is a partial structural schematic diagram of an integrated displacement sensor according to one embodiment of the present invention; Figure 5 This is a schematic diagram of the slide block according to one embodiment of the present invention.

[0016] Explanation of reference numerals in the attached figures: 1. Integrated displacement sensor; 10. Housing; 11. Groove; 12. Light guide hole; 20. Side block; 200. U-shaped groove; 21. Crossbar; 22. Elastic element; 23. Measuring element; 230. Slide base; 231. Slide rod; 232. Slide cylinder; 233. Shaft cylinder; 234. Soft rubber sealing tube; 235. Plastic limiting block; 236. Soft rubber limiting ring; 237. Circuit board; 238. Sensing plate; 239. Light guide column; 30. Cover plate; 40. Sealing ring. Detailed Implementation

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] like Figures 1 to 5 As shown, in one embodiment, an integrated displacement sensor 1 includes a housing 10 and an anti-rotation component. The housing 10 has a groove 11. The anti-rotation component includes a side block 20, a crossbar 21, an elastic element 22, and a measuring element 23. The measuring element 23 is inserted into the housing 10, and one end of the measuring element 23 is located in the groove 11. The side block 20 is detachably disposed on an inner sidewall of the groove 11. A U-shaped groove 200 is provided on the side block 20. One end of the crossbar 21 is vertically disposed on the measuring element 23, and the other end of the crossbar 21 is slidably engaged with the U-shaped groove 200. When the measuring element 23 slides relative to the housing 10, the measuring element 23 drives the crossbar 21 to slide and engage with the U-shaped groove 200. The two ends of the elastic element 22 are respectively connected to the inner sidewall of the groove 11 and the crossbar 21. The elastic element 22 is used to drive the measuring element 23 to slide to the initial position.

[0022] It should be noted that a groove 11 is provided on the outer casing 10. For ease of description, when viewing the groove 11 from a top view, the inner sidewalls around the groove 11 are defined as the upper sidewall, lower sidewall, left sidewall, and right sidewall, respectively. The measuring element 23 passes vertically through the lower sidewall and extends from the outer sidewall of the outer casing 10, with one end of the measuring element 23 located inside the groove 11 and the other end located in the external environment, and the measuring element 23 is located near the right sidewall. The side block 20 is disposed on the inner bottom wall of the groove 11 and is in close contact with the left sidewall, such that the side block 20 faces the measuring element 23. Furthermore, the components are parallel to each other; a U-shaped groove 200 is provided on the side surface of the side block 20 near the measuring component 23, and the direction of the U-shaped groove 200 is consistent with the direction in which the measuring component 23 slides relative to the outer casing 10; one end of the crossbar 21 is vertically disposed on the end of the measuring component 23 located in the groove 11, and the other end of the crossbar 21 extends into the U-shaped groove 200. When the measuring component 23 slides relative to the outer casing 10, the measuring component 23 will drive the crossbar 21 to slide precisely along the direction of the U-shaped groove 200 to prevent the measuring component 23 from rotating. In this way, the measuring component 23 can only slide relative to the outer casing 10 and cannot rotate, thereby improving the measurement accuracy.

[0023] It should be noted that the elastic element 22 is a tension spring structure. One end of the elastic element 22 is connected to the inner bottom wall of the groove 11 and is close to the lower side wall, while the other end of the elastic element 22 is connected to the crossbar 21. When the measuring element 23 comes into contact with the object being measured and slides closer to the upper side wall, the crossbar 21 will pull the elastic element 22 away. When the measuring element 23 is no longer in contact with the object being measured, the elastic element 22, under its own elastic force, pulls the measuring element 23 out relative to the outer shell 10 through the crossbar 21. In this way, the elastic element 22 can return the measuring element 23 to its initial position.

[0024] It should be noted that since the side block 20 is fixed to the inner wall of the groove 11 by screws, when it is necessary to increase the sliding stroke of the measuring element 23, the sliding stroke of the measuring element 23 can be met by replacing the side block 20 with one of appropriate length. In this way, compared with the existing design of opening an oblong hole in the housing, the processing cost of the equipment can be greatly reduced.

[0025] like Figures 2 to 5 As shown, in one embodiment, the measuring element 23 includes a slide block 230, a slide rod 231 and a slide cylinder 232. The slide cylinder 232 is disposed on the outer shell 10, the slide rod 231 is coaxially inserted into the slide cylinder 232, the slide block 230 is disposed on the slide rod 231, and one end of the crossbar 21 is vertically disposed on one side of the slide block 230.

[0026] It should be noted that a protrusion is provided on the lower part of the outer casing 10, and a through hole is provided on the outer casing 10. The two ends of the through hole are respectively connected to the lower side wall and the end face of the protrusion away from the groove 11. Part of the structure of the slide cylinder 232 is embedded in the through hole and screwed to the inner side wall of the through hole, so that the protrusion is in a state of wrapping the part of the slide cylinder 232. In this way, the slide cylinder 232 can be firmly set on the outer casing 10. Furthermore, the slide rod 231 is coaxially inserted into the slide cylinder 232 so that the slide cylinder 232 guides the slide rod 231 to slide coaxially. Furthermore, one end of the slide base 230 is provided on the end of the slide rod 231 that extends into the groove 11, so that when the slide rod 231 slides coaxially with respect to the slide cylinder 232, it drives the slide base 230 to slide in the groove 11, thereby causing the slide base 230 to drive the crossbar 21 to slide along the opening direction of the U-shaped groove 200.

[0027] like Figures 3 to 4 As shown, in one embodiment, the measuring component 23 further includes a shaft cylinder 233, which is coaxially sleeved on the slide rod 231, and the inner and outer side walls of the shaft cylinder 233 slide against the outer side wall of the slide rod 231 and the inner side wall of the slide cylinder 232, respectively.

[0028] It should be noted that the shaft cylinder 233 has a dense ball bearing structure. For example, the shaft cylinder 233 is a tubular structure with several spaced circular holes on its outer wall. Each circular hole connects to the inner and outer side walls of the shaft cylinder 233, and each circular hole is provided with a rolling ball. The opposing sides of each ball protrude from the inner and outer side walls of the shaft cylinder 233. When the shaft cylinder 233 is fitted onto the slide rod 231, each ball can roll and abut against the outer side wall of the slide rod 231 and the inner side wall of the slide cylinder 232, respectively. Thus, when the slide rod 231 slides out relative to the slide cylinder 232, the slide rod 231 will... The shaft cylinder 233 is slid to the end of the slide cylinder 232 away from the groove 11. When the slide rod 231 slides back relative to the slide cylinder 232, the slide rod 231 will drive the shaft cylinder 233 to slide to the end of the slide cylinder 232 close to the groove 11. The slide seat 230 is set on the slide rod 231. When the slide rod 231 slides, it will drive the slide seat 230 to slide together, so that the slide rod 231 and the slide seat 230 form a measuring rod structure. In this way, the shaft cylinder 233 can always maintain the middle position of the measuring rod, thereby avoiding the measuring rod from swinging due to the non-centering of the support positions at the left and right ends, thus affecting the measurement accuracy.

[0029] like Figures 1 to 4 As shown, in one embodiment, the measuring component 23 further includes a soft rubber sealing tube 234, which is sleeved on the slide rod 231, and both ends of the soft rubber sealing tube 234 are respectively sealed and connected to the slide cylinder 232 and the end of the slide rod 231.

[0030] It should be noted that the soft rubber sealing tube 234 is a foldable and telescopic rubber tube structure. One end of the soft rubber sealing tube 234 is sealed and connected to the end of the slide cylinder 232 away from the groove 11, and the other end of the soft rubber sealing tube 234 is sealed and connected to the end of the slide rod 231 away from the slide seat 230, so that the soft rubber sealing tube 234 seals the gap between the slide cylinder 232 and the end of the slide rod 231 away from the groove 11. like Figures 3 to 4 As shown, in one embodiment, the measuring component 23 further includes a plastic limiting block 235 and a soft rubber limiting ring 236. The plastic limiting block 235 is disposed in the groove 11, and the soft rubber limiting ring 236 is sleeved on the slide rod 231. When the slide 230 slides to one end, one side of the slide 230 abuts against the plastic limiting block 235; when the slide 230 slides to the other end, the other side of the slide 230 abuts against the soft rubber limiting ring 236.

[0031] It should be noted that the plastic limiting block 235 is disposed on the inner bottom wall of the groove 11, and near the right side wall; while the two sides of one end of the slide block 230 at the connection position with the slide rod 231 have a protruding structure. When the slide rod 231 drives the slide block 230 to slide closer to the upper side wall, the protruding structure on the side of the slide block 230 near the inner bottom wall of the groove 11 abuts against the plastic limiting block 235; and the plastic limiting block 235 is a soft plastic structure, which limits the maximum travel of the slide block 230 relative to the groove 11 while also... This design helps to prevent the slide block 230 from colliding with the bottom wall of the groove 11, thus affecting the measurement accuracy. The soft rubber limiting ring 236 is sleeved on the slide rod 231, with the end of the soft rubber limiting ring 236 close to the slide block 230. When the slide rod 231 drives the slide block 230 to slide closer to the lower side wall, the slide block 230 pushes the soft rubber limiting ring 236 to abut against the lower side wall. This limits the minimum stroke of the slide block 230 relative to the groove 11 and also prevents the slide block 230 from colliding with the lower side wall of the groove 11, thus affecting the measurement accuracy.

[0032] like Figures 2 to 4 As shown, in one embodiment, the measuring component 23 further includes a circuit board 237 and a sensing plate 238. The sensing plate 238 is disposed on the slide 230, and the circuit board 237 is disposed on the housing 10. The circuit board 237 and the sensing plate 238 are parallel to each other and have a gap between them.

[0033] It should be noted that, in one embodiment, the sensing plate 238 is a grating sensing plate (grating ruler) structure, and a reading head (including a light source, an optical lens, and a photodetector) is provided on the circuit board 237; the reading head and the sensing plate 238 are arranged opposite each other without contact, so that there is a slight gap between the reading head and the sensing plate 238. In this way, friction between the reading head and the sensing plate 238 is avoided, and the reflection path of the light emitted by the reading head is reduced, thereby shortening the measurement time and improving the measurement response speed. This allows the reading head to more accurately identify the stripes on the sensing plate 238, thereby improving the measurement accuracy.

[0034] like Figures 1 to 2 , Figure 4 As shown, in one embodiment, the housing 10 has a light guide hole 12, and the measuring component 23 also includes a light guide post 239. The light guide post 239 is sealed inside the light guide hole 12 and is used to transmit the light signal on the circuit board 237 to the outside.

[0035] It should be noted that a status indicator light is also provided on the circuit board 237. When the circuit board 237 is placed on the housing 10, one end of the light guide post 239 is aligned with the status indicator light. In this way, the operator can understand the measurement status at any time through the status indicator light (for example, a red light is displayed during the measurement and a green light is displayed after the measurement is completed).

[0036] like Figures 1 to 4 As shown, in one embodiment, the integrated displacement sensor 1 further includes a cover plate 30 and a sealing ring 40. The cover plate 30 is disposed on the housing 10, and the sealing ring 40 is used to seal the gap between the housing 10 and the cover plate 30.

[0037] It should be noted that the cover plate 30 is screwed onto the outer casing 10 to seal the groove 11, so that the groove 11 and one side wall of the cover plate 30 together form a closed chamber; while the sealing ring 40 is disposed on the outer casing 10 along the periphery of the groove 11, and the sealing ring 40 is located between the cover plate 30 and the outer casing 10, so that the cover plate 30 and the outer casing 10 together clamp the sealing ring 40, thereby sealing the chamber and preventing water or dust from entering the chamber, thus improving the measurement accuracy.

[0038] 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. An integrated displacement sensor, characterized in that, include: The outer casing, wherein a groove is formed on the outer casing; and An anti-rotation assembly includes a side block, a crossbar, an elastic element, and a measuring element. The measuring element is inserted into the housing, with one end located within the groove. The side block is detachably mounted on an inner wall of the groove and has a U-shaped groove. One end of the crossbar is vertically mounted on the measuring element, and the other end of the crossbar is slidably engaged with the U-shaped groove. When the measuring element slides relative to the housing, it causes the crossbar to slide and engage with the U-shaped groove. Both ends of the elastic element are connected to the inner wall of the groove and the crossbar, respectively, and the elastic element is used to drive the measuring element to slide to its initial position.

2. The integrated displacement sensor according to claim 1, characterized in that, The measuring component includes a slide block, a slide rod, and a slide cylinder. The slide cylinder is disposed on the outer shell, the slide rod is coaxially inserted inside the slide cylinder, the slide block is disposed on the slide rod, and one end of the crossbar is vertically disposed on one side of the slide block.

3. The integrated displacement sensor according to claim 2, characterized in that, The measuring component also includes a shaft sleeve, which is coaxially sleeved on the slide rod, and the inner and outer side walls of the shaft sleeve slide against the outer side wall of the slide rod and the inner side wall of the slide sleeve, respectively.

4. The integrated displacement sensor according to claim 3, characterized in that, The measuring component also includes a soft rubber sealing tube, which is sleeved on the slide rod, and both ends of the soft rubber sealing tube are respectively sealed to the ends of the slide cylinder and the slide rod.

5. The integrated displacement sensor according to claim 4, characterized in that, The measuring component also includes a plastic limiting block and a soft rubber limiting ring. The plastic limiting block is disposed in the groove, and the soft rubber limiting ring is sleeved on the slide rod. When the slide block slides to one end, one side of the slide block abuts against the plastic limiting block; when the slide block slides to the other end, the other side of the slide block abuts against the soft rubber limiting ring.

6. The integrated displacement sensor according to claim 5, characterized in that, The measuring component also includes a circuit board and a sensing plate. The sensing plate is disposed on the slide, and the circuit board is disposed on the housing. The circuit board and the sensing plate are parallel to each other and are spaced apart.

7. The integrated displacement sensor according to claim 6, characterized in that, The housing has a light guide hole, and the measuring component also includes a light guide post. The light guide post is sealed inside the light guide hole and is used to transmit the optical signal on the circuit board to the outside.

8. The integrated displacement sensor according to claim 7, characterized in that, The integrated displacement sensor also includes a cover plate and a sealing ring. The cover plate is disposed on the housing, and the sealing ring is used to seal the gap between the housing and the cover plate.

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