Pressure sensor quick locking structure for indentation instrument and indentation instrument

Abstract

The utility model discloses a pressure sensor quick-locking structure for an indentation instrument, which comprises a positioning seat with a hollow interior to form a mounting cavity; the elastic unit is partially arranged in the mounting cavity and at least comprises a movable assembly, an elastic piece and a locking part, the elastic piece abuts against the movable assembly and the positioning base respectively, and the locking part is arranged at the end of the movable assembly and located outside the mounting cavity; the locking groove is formed in the end part of the pressure sensor and is provided with a groove body for the locking part to extend in and a locking convex part radially protruding from the side wall of the groove body; the locking protruding part can abut against the locking part to slide, the movable assembly moves along the installation cavity, and the elastic piece is compressed so that the locking part can be clamped between the positioning base and the locking protruding part. The utility model further discloses an indentation instrument. According to the utility model, the rapid locking of the pressure sensor and the positioning seat can be realized, then the rapid locking of the pressure sensor and the indentation instrument is realized, the locking operation is simple and convenient, and the replacement of pressure sensors with different measuring ranges is facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of indentation instrument technology, and in particular relates to a pressure sensor quick-lock structure for an indentation instrument and an indentation instrument. Background Technology

[0002] In the field of force measurement, a persistent problem exists: the accuracy and resolution of force sensors are related to the force value. Higher accuracy force sensors have smaller force measurement ranges. Traditional indenters, limited by their single-range design, exhibit a negative correlation between measurement accuracy and range: high-precision sensors (e.g., 1N range) produce nonlinear distortion when measuring forces in the 5000N range, while wide-range sensors (e.g., 5000N range) struggle to distinguish minute loads below 1N. Current technologies achieve wide-range measurement by paralleling multiple sensors or configuring multiple devices, but this suffers from technical drawbacks such as volume redundancy, high cost, and operational complexity, failing to meet the engineering requirements of portable devices for integration, rapid response, and multi-scenario adaptability. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides a quick-lock structure for the pressure sensor of an indenter and an indenter, which enables quick replacement of the pressure sensor and realizes multi-range force measurement and control of an indenter.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a quick-lock structure for a pressure sensor in an indenter, comprising:

[0005] The positioning seat has a hollow interior forming an installation cavity;

[0006] The elastic unit is partially disposed in the mounting cavity and includes at least a movable component, elastic members that abut against the movable component and the positioning seat respectively, and a locking part disposed at the end of the movable component, the locking part being located outside the mounting cavity;

[0007] A locking groove is provided at the end of the pressure sensor, having a groove into which a locking part extends and a locking protrusion that protrudes radially from the side wall of the groove.

[0008] The locking protrusion can slide against the locking part, the movable component moves along the mounting cavity, and the elastic element is compressed to clamp the locking part between the positioning seat and the locking protrusion.

[0009] Furthermore, the locking part has a helical inclined surface and an abutting plane located at the end of the helical inclined surface, and the locking protrusion slides against the helical inclined surface until it abuts against the abutting plane.

[0010] Furthermore, there are two locking protrusions, which are radially symmetrically distributed; and there are two locking parts, which are correspondingly arranged with respect to the locking protrusions.

[0011] Furthermore, the movable component includes a movable body, an adjusting member, and a guide member that can cooperate with the positioning seat for limiting. The movable body and the adjusting member are detachably connected and used to adjust the extension length of the elastic member.

[0012] Furthermore, the movable component also includes a guide base and a limiting member for connecting the guide base and the movable component body; the inner wall of the positioning seat forms an axially extending groove, and a portion of the guide member extends into the groove to form a limiting fit.

[0013] Furthermore, the positioning seat is fitted with a signal contact plate, and the pressure sensor end is fitted with a signal contact plate. When the locking part is clamped between the positioning seat and the locking protrusion, the signal contact plate and the signal contact plate are in close contact.

[0014] Furthermore, the signal contact plate is provided with a limiting pin that can abut against the locking protrusion to prevent the locking protrusion from continuing to rotate.

[0015] Furthermore, a supporting boss is formed on the inner wall of the pressure sensor end, and the signal contact plate is placed on the supporting boss and forms a radial limit with the inner wall; the outer wall of the positioning seat forms a stepped structure that can abut against the signal contact plate.

[0016] Furthermore, the positioning seat forms an extension section corresponding to the locking part position that can radially limit the pressure sensor end.

[0017] This utility model also discloses an indentation tester, including an indentation tester and a loading device, wherein the indentation tester includes the aforementioned quick-lock structure.

[0018] The beneficial effects of this utility model are: 1) By utilizing the rotational cooperation of the locking groove and locking part of the pressure sensor, the pressure sensor and the positioning seat can be quickly locked, thereby realizing the quick locking of the pressure sensor and the indenter. The locking operation is simple and convenient, which is beneficial for the replacement of pressure sensors with different ranges; 2) The convenient replacement of the pressure sensor enables multi-range force measurement control of an indenter, increasing the ease of use and flexibility of the indenter; 3) The locking part has a spiral inclined surface, which cooperates with the locking protrusion to achieve the effect of conical surface positioning, so that the pressure sensor will not slide laterally after being subjected to force, thus improving its measurement accuracy; 4) When locked... When the part is clamped between the positioning seat and the locking protrusion, the elastic element is in a compressed state, and there is a pre-tightening force on the contact surface between the pressure sensor and the positioning seat, which increases the rigid connection strength between the locking protrusion and the locking part abutting plane; 5) While the pressure sensor and the positioning seat are locked, the signal contact plate and the signal contact plate are in close contact, so that the circuit is in a conductive state. Moreover, since the elastic element is compressed, it provides a large restoring force, which increases the stability of the signal connection; 6) The movable part body and the adjusting part are detachably connected, which can adjust the extension length of the elastic element and thus adjust the initial elastic force of the elastic element, so that it is within a suitable range, which is beneficial to the accuracy of the subsequent indentation test results. Attached Figure Description

[0019] Figure 1 A perspective view of the quick-lock structure of the pressure sensor provided by this utility model.

[0020] Figure 2 An exploded view of the quick-lock structure of the pressure sensor provided by this utility model.

[0021] Figure 3 This is a cross-sectional view of the quick-lock structure of the pressure sensor provided by this utility model.

[0022] Figure 4 Partial three-dimensional view of the pressure sensor quick-lock structure provided by this utility model Figure 1 .

[0023] Figure 5 A partial cross-sectional view of the quick-lock structure of the pressure sensor provided by this utility model.

[0024] Figure 6 A partial top view of the quick-lock structure of the pressure sensor provided by this utility model.

[0025] Figure 7 A perspective view of the elastic unit provided by this utility model.

[0026] Figure 8 The front view of the movable component provided by this utility model.

[0027] Figure 9A perspective view of the pressure sensor provided by this utility model.

[0028] Figure 10 A perspective view of the indentation instrument provided by this utility model.

[0029] Figure 11 This is a cross-sectional view of the indentation instrument provided by this utility model.

[0030] Among them, 1-positioning seat, 11-mounting cavity, 12-slot, 13-step structure, 14-extension section, 2-elastic unit, 21-moving component, 211-moving part body, 212-adjusting component, 213-guide component, 214-guide base, 215-limiting component, 216-notch groove, 22-elastic component, 23-locking part, 231-spiral inclined surface, 232-abutting plane, 3-pressure sensor, 31-locking groove, 311-groove body, 312-locking protrusion, 32-supporting protrusion, 41-signal contact plate, 42-signal contact plate, 421-limiting pin, 5-indentation tester. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort should fall within the scope of protection of the present invention.

[0032] like Figures 1-5 As shown, a quick-lock structure for a pressure sensor in an indenter includes a positioning seat with a hollow interior forming a mounting cavity 11, a spring unit 2 partially disposed within the mounting cavity 11, and a locking groove 31 disposed at the end of the pressure sensor 3.

[0033] like Figure 2 , Figure 3 , Figure 5 , Figure 7 As shown, the elastic unit 2 includes at least a movable component 21, an elastic element 22 that abuts against the movable component 21 and the positioning seat 1 respectively, and a locking part 23 disposed at the end of the movable component 21, the locking part 23 being located outside the mounting cavity 11. In this embodiment, the elastic element 22 is a spring, which is sleeved on the outer periphery of the movable component 21.

[0034] like Figure 9As shown, the locking groove 31 has a groove 311 into which the locking part 23 extends, and a locking protrusion 312 that protrudes radially from the side wall of the groove 311. The locking protrusion 312 can slide against the locking part 23. The movable component 21 moves along the mounting cavity 11, and the elastic member 22 is compressed, thereby clamping the locking part 23 between the positioning seat 1 and the locking protrusion 312. Figure 10 , Figure 11 As shown, the indenter 5 is connected to the positioning base 1, thus enabling the pressure sensor 3 and the indenter 5 to be quickly locked together, making the operation convenient.

[0035] like Figure 7 , Figure 8 As shown, the locking part 23 has a spiral inclined surface 231 and an abutting surface 232 located at the end of the spiral inclined surface 231. When the locking protrusion 312 slides against the locking part 23, it first slides and rises against the spiral inclined surface 231 until it slides to abut against the abutting surface 232. At this time, the locking protrusion 312 stops sliding and rises, and instead rotates on the same horizontal plane to increase the contact area with the abutting surface 232, making the connection between the two more stable.

[0036] To ensure the stability of the connection between the pressure sensor 3 and the elastic unit 2 and to avoid circumferential displacement, there are two locking protrusions 312, which are radially symmetrically distributed. Similarly, there are also two locking parts 23, which are arranged corresponding to the locking protrusions 312. The spiral inclined surfaces 231 of these parts are not adjacent to each other, but are staggered.

[0037] To ensure that the movable component 21 can translate axially along the mounting cavity 11, the movable component 21 also includes a guide 213 that can be limited and engaged with the positioning seat 1. Specifically, such as... Figure 5 As shown, the inner wall of the positioning seat 1 forms an axially extending groove 12, and the guide member 213 is arranged radially, with a portion of it extending into the groove 12 to form a limiting fit. In this embodiment, there are two grooves 12, which are symmetrically distributed radially, and similarly, there are also two guide members 213.

[0038] To facilitate the installation of the guide member 213, the movable assembly 21 also includes a guide base 214 and a limiting member 215 for connecting the guide base 214 and the movable member body 212. Figure 6 , Figure 7As shown, the outer wall of the movable part body 212 forms a notch 216 for the partial insertion of the limiting member 215. The limiting member 215 is radially engaged within the guide base 214, with its inner end extending into the notch 216, thus preventing the movable part body 211 and the guide base 214 from rotating circumferentially relative to each other. Meanwhile, the outer end of the guide member 213 extends into the slot 12, preventing the guide base 214 and the positioning seat 1 from rotating circumferentially relative to each other. Consequently, the elastic unit 2 as a whole will not arbitrarily deflect within the positioning seat 1, resulting in a relatively stable overall structure.

[0039] To adjust the extension of the elastic element 22, the movable component 21 includes a movable body 211 and an adjusting member 212, which are detachably connected. The overall length of the connected components is adjustable, thus achieving the purpose of adjusting the extension length of the elastic element 22. Specifically, the movable body 211 and the adjusting member 212 can be threaded together. By adjusting the length of the threaded connection, the overall length is adjusted, thereby adjusting the extension length of the elastic element 22. If the overall length of the movable body 211 and the adjusting member 212 is long, the extension length of the elastic element 22 is large, and the elastic restoring force of the elastic element 22 is relatively small; conversely, if the overall length of the movable body 211 and the adjusting member 212 is short, the extension length of the elastic element 22 is small, and the elastic restoring force of the elastic element 22 is relatively large.

[0040] like Figures 1-3 As shown, the positioning seat 1 is equipped with a signal contact plate 41, and the pressure sensor 3 is equipped with a signal contact plate 42 at its end. When the locking part 23 is clamped between the positioning seat 1 and the locking protrusion 312, the signal contact plate 41 and the signal contact plate 42 are in close contact.

[0041] like Figure 2 As shown, the signal contact plate 42 is provided with a limiting pin 421 that can abut against the locking protrusion 312. It is used to prevent the locking protrusion 312 from continuing to rotate. That is, when the locking protrusion 312 rotates to abut against the limiting pin 421 on the same horizontal plane, the locking protrusion 312 stops rotating and stays at a fixed position.

[0042] like Figure 9 As shown, a supporting boss 32 is formed on the inner wall of the top of the pressure sensor 3. The signal contact plate 42 is placed on the supporting boss 32 and forms a radial limit with the inner wall, so that the position of the signal contact plate 42 is relatively fixed and will not be offset.

[0043] like Figure 3 , Figure 5As shown, the outer wall of the positioning seat 1 forms a stepped structure 13. The signal contact plate 41 is a hollow ring, which is sleeved on the outer periphery of the positioning seat 1 and abuts against the stepped structure, thereby forming radial and axial limiting. Similarly, the signal contact plate 42 is also sleeved on the outer periphery of the positioning seat 1. To further increase the stability of the overall structure, the positioning seat 1 forms an extension section 14 corresponding to the locking part 23. The signal contact plate 42 is sleeved on the outer periphery of the extension section 14, and the top of the pressure sensor 3 is just stuck inside the extension section 14, thereby forming a radial limiting fit between the two. In this embodiment, the lower surface of the signal contact plate 41 has multiple spring contacts. When the signal contact plate 42 and the signal contact plate 41 are in a conductive state, the spring contacts are in a compressed state, making the conduction between the two more stable. The structure of the spring contacts can be existing technology and will not be described in detail.

[0044] The working process of the quick-lock structure of the pressure sensor used in the indenter in this utility model is as follows: In the initial state, the pressure sensor 3 is in the state of being disengaged from the locking part 23; Select a suitable pressure sensor 3, align its locking groove 31 with the locking part 23, rotate the pressure sensor 3 clockwise, and the locking protrusion 312 slides against the spiral inclined surface 231. At the same time, the locking part 23 is rotated by the locking protrusion 312, generating a downward force, which drives it to move downward. The guide base 214, the limiting member 215, the guide member 213, and the adjusting member 212 move downward synchronously, thereby compressing the elastic member 22; until the locking protrusion 312 abuts against the abutting plane 232 and contacts the limiting pin 421, the pressure sensor 3 will not continue to rotate, and the locking process with the locking part 23 ends. The signal contact plate 41 and the signal contact plate 42 are in close contact, and the pressure sensor 3 is in the locked state.

[0045] like Figure 10 , Figure 11 As shown, an indentation tester includes an indentation tester 5 and a loading device (not shown in the figure). The indentation tester 5 includes a quick-lock structure with the above-mentioned structure. A pressure sensor 3 extends from the bottom of the indentation tester 5 and can cooperate with the loading device to detect indentations on the surface of the object to be tested.

[0046] The above specific embodiments are used to explain and illustrate the present utility model, and are not intended to limit the present utility model. Any modifications and changes made to the present utility model within the spirit and scope of the claims shall fall within the protection scope of the present utility model.

Claims

1. A quick-lock structure for a pressure sensor in an indenter, characterized in that, include: The positioning seat (1) has a hollow interior forming an installation cavity (11); The elastic unit (2) is partially disposed in the mounting cavity (11), and includes at least a movable component (21), an elastic element (22) that abuts against the movable component (21) and the positioning seat (1) respectively, and a locking part (23) disposed at the end of the movable component (21), the locking part (23) being located outside the mounting cavity (11); The locking groove (31) is provided at the end of the pressure sensor (3), and has a groove (311) into which the locking part (23) extends, and a locking protrusion (312) that protrudes radially from the side wall of the groove (311). The locking protrusion (312) can slide against the locking part (23), the movable component (21) moves along the mounting cavity (11), and the elastic element (22) is compressed to clamp the locking part (23) between the positioning seat (1) and the locking protrusion (312).

2. The quick-lock structure for the pressure sensor of an indenter according to claim 1, characterized in that: The locking part (23) has a spiral inclined surface (231) and an abutting surface (232) located at the end of the spiral inclined surface (231). The locking protrusion (312) slides against the spiral inclined surface (231) until it abuts against the abutting surface (232).

3. The quick-lock structure for the pressure sensor of an indenter according to claim 1 or 2, characterized in that: There are two locking protrusions (312), which are radially symmetrically distributed; there are two locking parts (23), which are correspondingly arranged with respect to the locking protrusions (312).

4. The quick-lock structure for the pressure sensor of an indenter according to claim 1, characterized in that: The movable component (21) includes a movable body (211), an adjusting component (212), and a guide component (213) that can be limited and cooperated with the positioning seat (1). The movable body (211) and the adjusting component (212) are detachably connected and used to adjust the extension length of the elastic component (22).

5. The quick-lock structure for the pressure sensor of an indenter according to claim 4, characterized in that: The movable component (21) further includes a guide base (214) and a limiting member (215) for connecting the guide base (214) and the movable body (211); the inner wall of the positioning seat (1) forms an axially extending groove (12), and a portion of the guide member (213) extends into the groove (12) to form a limiting fit.

6. The quick-lock structure for the pressure sensor of an indenter according to claim 1, characterized in that: The positioning seat (1) is fitted with a signal contact plate (41), and the pressure sensor (3) is provided with a signal contact plate (42) at its end. When the locking part (23) is clamped between the positioning seat (1) and the locking protrusion (312), the signal contact plate (41) and the signal contact plate (42) are in close contact.

7. The quick-lock structure for the pressure sensor of an indenter according to claim 6, characterized in that: The signal contact plate (42) is provided with a limiting pin (421) that can abut against the locking protrusion (312) to prevent the locking protrusion (312) from continuing to rotate.

8. The quick-lock structure for the pressure sensor of an indenter according to claim 6, characterized in that: The pressure sensor (3) has a support boss (32) formed on the inner wall of its end. The signal contact plate (42) is placed on the support boss (32) and forms a radial limit with the inner wall. The positioning seat (1) has a stepped structure (13) formed on its outer wall that can abut against the signal contact plate (41).

9. The quick-lock structure for the pressure sensor of an indenter according to claim 1, characterized in that: The positioning seat (1) forms an extension section (14) at the position corresponding to the locking part (23) that can be radially limited to the end of the pressure sensor (3).

10. An indentation instrument, characterized in that: It includes an indentation tester (5) and a loading device, wherein the indentation tester (5) includes a quick-lock structure as described in any one of claims 1-9.

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