A planar slide mechanism for an indenter

Abstract

This utility model discloses a planar sliding stage mechanism for an indentation tester, comprising: an upper sliding plate for supporting the sample and equipped with a sliding element; a lower sliding plate located below the upper sliding plate and equipped with a track for relative sliding of the sliding element, wherein the track at least achieves vertical positioning of the sliding element; a pre-tightening unit, at least partially passing through the sliding element and connected to the upper sliding plate, for generating a pre-tightening force between the sliding element and the upper sliding plate, so that the upper sliding plate moves in the direction of the sliding element; and a driving unit connected to the sliding element for driving the upper and lower sliding plates to slide horizontally relative to each other. This utility model eliminates the contact gap between the upper and lower sliding plates through the pre-tightening unit, increases the contact stiffness between the upper and lower sliding plates, and reduces the vertical displacement caused by elastic or plastic deformation of the contact surface between the upper and lower sliding plates during indentation testing, thereby avoiding adverse effects on the test results during sample indentation depth measurement.

Description

Technical Field

[0001] This utility model belongs to the field of indentation instrument technology, and in particular relates to a planar slide mechanism for an indentation instrument. Background Technology

[0002] In the field of materials mechanical property characterization, indenters (especially nano / micro indenters) obtain key parameters such as hardness and modulus by measuring the load-displacement curve during the indenter's insertion into the sample. The core of this technology's accuracy lies in the precise measurement of minute changes in indentation depth (typically on the nanometer to micrometer scale). However, when traditional slide stages are used to support samples, the assembly gap between the upper and lower slides often becomes a significant source of error during testing. During the initial stage when the indenter contacts the sample and begins to apply load, and as the load changes, these gaps cause minute and unpredictable relative displacements between the slides, introducing "false" depth signals not caused by material deformation. This depth uncertainty caused by mechanical gaps severely interferes with the measurement of the true indentation depth, directly affecting the accuracy and reliability of the test data, especially under high-precision requirements. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides a planar slide mechanism for an indenter, which is equipped with a pre-tightening unit to eliminate the uncertainty in the indentation depth caused by the contact gap between the upper and lower slide plates, thus significantly improving the testing accuracy.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a planar slide mechanism for an indentation instrument, comprising:

[0005] The upper sliding plate is used to support the sample and is equipped with a sliding component;

[0006] The lower slide plate is located below the upper slide plate and has a track for the sliding member to slide relative to it. The track at least enables the sliding member to be positioned in the vertical direction.

[0007] The pre-tightening unit, which passes at least partially through the slider and is connected to the upper slide plate 1, is used to generate a pre-tightening force between the slider and the upper slide plate so that the upper slide plate moves in the direction of the slider.

[0008] A drive unit, connected to the slider, is used to drive the upper and lower sliding plates to slide horizontally relative to each other.

[0009] Furthermore, the pre-tightening unit includes at least a pre-tightening member that passes through the sliding member and is connected to the upper slide plate, and elastic members that abut against the pre-tightening member and the sliding member respectively. The upper slide plate is provided with a mounting hole, the pre-tightening member is connected to the mounting hole, and the connection length between the two is adjustable.

[0010] Furthermore, the pre-tightening unit also includes a follower located below the sliding member, and the pre-tightening member passes through the follower and the sliding member in sequence and is connected to the upper slide plate.

[0011] Furthermore, the pre-tightening unit also includes a positioning pin, which penetrates the sliding member and is positioned and inserted at both ends into the upper sliding plate and the follower member, respectively.

[0012] Furthermore, the drive unit includes a handle extending from the side of the lower slide plate and a drive component connected to the handle, wherein the drive component is in transmission cooperation with the follower component.

[0013] Furthermore, the outer wall of the driving component is formed with an external thread, and the follower component is provided with a mating component with an internal thread. The driving component and the mating component are driven and engaged through the internal and external threads.

[0014] Furthermore, the elastic element is a disc spring.

[0015] Furthermore, the number of positioning pins is at least two, and the number of preloads is at least two, with both alternatingly distributed on the same straight line.

[0016] The beneficial effects of this utility model are: 1) The pre-tightening unit eliminates the contact gap between the upper and lower slide plates, increases the contact stiffness between the upper and lower slide plates, and reduces the vertical displacement caused by elastic or plastic deformation of the contact surface between the upper and lower slide plates during indentation detection, thereby avoiding the adverse effects on the test results introduced into the sample indentation depth measurement; 2) The setting of the elastic element makes the magnitude of the pre-tightening force between the upper and lower slide plates adjustable, which facilitates the precise setting of the pre-tightening force; 3) The magnitude of the pre-tightening force can be achieved by adjusting the depth of the upper end of the pre-tightening element screwed into the mounting hole, which is convenient and effective; 4) The structural design of the drive unit is reasonable, which can effectively convert the rotational motion into linear movement, and the operation is convenient and labor-saving; 5) The structural design of the pre-tightening unit is simple and ingenious, and the assembly is convenient. Attached Figure Description

[0017] Figure 1 The three-dimensional representation of this utility model Figure 1 At this point, the upper and lower skateboards are directly opposite each other.

[0018] Figure 2 The three-dimensional representation of this utility model Figure 2 At this point, the upper skateboard slides out of alignment with the lower skateboard.

[0019] Figure 3 This is an exploded structural diagram of the present invention.

[0020] Figure 4 A cross-sectional view of this utility model Figure 1 At this point, the upper and lower skateboards are directly opposite each other.

[0021] Figure 5 A cross-sectional view of this utility model Figure 2 At this point, the upper skateboard slides out of alignment with the lower skateboard.

[0022] Figure 6 This is a partial three-dimensional representation of the present invention. Figure 1 .

[0023] Figure 7 This is a partial three-dimensional representation of the present invention. Figure 2 .

[0024] Figure 8 This is a partial three-dimensional representation of the present invention. Figure 3 .

[0025] Figure 9 This is a partial three-dimensional representation of the present invention. Figure 4 .

[0026] Figure 10 This is a partial three-dimensional representation of the present invention. Figure 5 .

[0027] Figure 11 This is a partial three-dimensional representation of the present invention. Figure 6 .

[0028] Figure 12 This is a cross-sectional view of another side of the present invention.

[0029] Figure 13 for Figure 12 Enlarged view of the structure at point A in the image.

[0030] Figure 14 This is a schematic diagram of the present invention in conjunction with an indentation instrument.

[0031] Among them, 1-upper slide plate, 11-sliding component, 111-channel, 12-mounting hole, 2-lower slide plate, 21-track, 22-roller, 23-bearing seat, 3-preload unit, 31-preload component, 311-anti-detachment end, 32-elastic component, 33-follower component, 34-positioning pin, 4-drive unit, 41-handle, 42-drive component, 421-external thread, 422-rolling bearing, 423-plane thrust bearing, 43-fitting component, 5-sample, 6-indenter, 7-support. Detailed Implementation

[0032] 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.

[0033] like Figures 1-3 As shown, a planar slide mechanism for an indenter includes an upper slide plate 1 for carrying a sample 5, a lower slide plate 2 disposed below the upper slide plate 1, a pre-tightening unit 3, and a drive unit 4.

[0034] The upper slide plate 1 is connected to a sliding component 11, such as... Figure 10 , Figure 11 As shown, the sliding plate 2 is provided with a track 21 for the sliding member 11 to slide relative to each other, and the track 21 at least achieves the vertical positioning of the sliding member 11. In other words, when the sliding member 11 is assembled and connected to the track 21, the sliding member 11 will not shift in the vertical direction, and its vertical height position is determined.

[0035] like Figure 9 , Figure 12 , Figure 13 As shown, V-shaped channels 111 with outward openings are formed on both sides of the slider 11. Rollers 22 are formed between the slider 11 and the track 21. The slider 11 moves within the track 21 by utilizing the cooperation between the rollers 22 and the channels 111. The specific function is implemented by existing technology, such as the positive roller steady-state linear guide disclosed in Chinese patent CN220726860U, which will not be described in detail here.

[0036] At least a portion of the pre-tightening unit 3 passes through the slider 11 and connects to the upper slide plate 1, forming a pre-tightening force between the slider 11 and the upper slide plate 1, thereby causing the upper slide plate 1 to move in the direction of the slider 11. Specifically, the pre-tightening force between the slider 11 and the upper slide plate 1 causes the upper slide plate 1 and the slider 11 to move towards each other, or in other words, the pre-tightening force causes there to be opposing forces between the upper slide plate 1 and the slider 11, eliminating or nearly eliminating the gap between them. Since the slider 11 and the track 21 are vertically positioned, the vertical position of the slider 11 will not change. Therefore, specifically, the pre-tightening force between the slider 11 and the upper slide plate 1 causes the upper slide plate 1 to move downwards and towards the slider 11.

[0037] Specifically, such as Figures 3-5As shown, the pretensioning unit 3 includes a pretensioning member 31, a follower member 33 located below the sliding member 11, and an elastic member 32. The pretensioning member 31 passes through the follower member 33 and the sliding member 11 in sequence and is connected to the upper slide plate 1. The end of the pretensioning member 31 forms an anti-detachment end 311 with an increased outer diameter. The elastic member 32 abuts against the anti-detachment end 311 of the pretensioning member 31 and the follower member 33, respectively. Of course, the follower member 33 can also be omitted, and the pretensioning member 31 passes through the sliding member 11 and is connected to the upper slide plate 1, with the elastic member 32 abutting against the anti-detachment end 311 of the pretensioning member 31 and the sliding member 11, respectively.

[0038] The upper slide plate 1 has a mounting hole 12 on its inner top surface. Most of the outer wall of the pretensioner 31 is a smooth structure, and its upper end is provided with an external thread, so that the upper end of the pretensioner 31 can be threadedly connected to the mounting hole 12, and the threaded connection length of the two is adjustable.

[0039] In this embodiment, the elastic element 32 is sleeved on the preload element 31, and a disc spring can be selected specifically. By adjusting the length of the threaded connection between the preload element 31 and the mounting hole 12, the compression of the disc spring can be adjusted, ultimately achieving the effect of adjusting the preload force between the sliding element 11 and the upper slide plate 1.

[0040] In order to determine the assembly position of the sliding member 11 and the upper slide plate 1, the pre-tightening unit 3 also includes a positioning pin 34. The positioning pin 34 penetrates the sliding member 11 and is positioned and inserted at both ends on the upper slide plate 1 and the follower 33 respectively. The outer wall of the positioning pin 34 is smooth. Its function is to realize the positioning of the upper slide plate 1, the sliding member 11 and the follower 33 on the horizontal plane, so as to avoid the three from shifting, which is beneficial to the assembly of the pre-tightening member 31.

[0041] The number of locating pins 34 is at least two, and the number of preload members 31 is at least two. In this embodiment, the number of locating pins 34 is two, and the number of preload members 31 is three. The preload members 31 and locating pins 34 are alternately distributed on the same straight line, such as... Figure 10 , Figure 11 As shown, the preload 31 and the positioning pin 34 are alternately distributed along the length of the sliding member 11.

[0042] The drive unit 4 is connected to the slider 11 and is used to drive the upper slide plate 1 and the lower slide plate 2 to slide horizontally relative to each other. Specifically, as shown... Figure 6 , Figure 7As shown, the drive unit 4 includes a handle 41 extending from the side of the lower slide plate 2, and a drive member 42 connected to the handle 41. The drive member 42 is in a transmission engagement with the follower member 33. Specifically, an external thread 421 is formed on the outer wall of the drive member 42, and a mating member 43 is provided inside the follower member 33. The inner wall of the mating member 43 has an internal thread, so that the drive member 42 and the mating member 43 are in a transmission engagement through the internal and external threads. When an external force is applied to the handle 41 to rotate the drive member 42, the follower member 33 can translate relative to the drive member 42, thereby driving the sliding member 11 to translate.

[0043] The bearing housing 23 is connected inside the lower slide plate 2 and is assembled with the drive component 42. In order to reduce the effort required to rotate the drive component 42, a rolling bearing 422 and a planar thrust bearing 423 can be sleeved on the outer wall of the drive component 42. Thus, during assembly, the drive component 42 passes through the planar thrust bearing 423, the rolling bearing 422 and the bearing housing 23 in sequence to achieve the functions of support and guidance.

[0044] The pre-tightening member 31, fitted with the elastic element 32, is passed sequentially through the follower 33 and the sliding member 11 and then threadedly connected to the mounting hole 12 of the upper slide plate 1. By rotating the pre-tightening member 31, it is gradually screwed into the mounting hole 12 of the upper slide plate 1. As the pre-tightening member 31 is screwed in, its anti-disengagement end 311 applies an axial compressive force to the elastic element 32. The other side of the elastic element 32 is in contact with the lower end face of the follower 33, so that the follower 33 is in contact with the sliding member 11. Because the sliding member 11 is restricted by the track 21, it cannot move in the vertical direction. The sliding member 11 can only move horizontally along track 21, thus keeping it relatively stationary during the tightening of the preload member 31. At this time, the elastic potential energy generated by the compression deformation of the elastic member 32 acts upwards on the upper slide plate 1 and downwards on the lower slide plate 2, forming a stable vertical preload force between the upper slide plate 1 and the lower slide plate 2. This eliminates the contact gap between the upper slide plate 1 and the lower slide plate 2, reducing or avoiding the adverse effect of the gap on the indentation depth during indentation detection. The magnitude of the preload force can be adjusted by changing the depth to which the upper end of the preload member 31 is screwed into the mounting hole 12. Furthermore, the elastic member 32 is a disc spring, whose elastic force value at different compression heights is known, allowing for precise setting of the preload force.

[0045] The process of using this utility model is as follows: when an external force is applied to rotate the handle 41, the driving component 42 rotates accordingly. Since the driving component 42 and the mating component 43 are threaded transmission structures, the rotational motion will be converted into the mating component 43 carrying the follower 33 in a linear motion along the axis of the driving component 42. At this time, the pre-tightening component 31, the elastic component 32, the sliding component 11, the positioning pin 34, and the upper slide plate 1 move horizontally along the track 21 together. Then the horizontal position of the sample placed on the upper slide plate 1 is moved, thereby realizing the precise adjustment of the position of the slide table pressing point.

[0046] like Figure 14 As shown, the indenter 6 is mounted on the support 7, and the planar slide mechanism is also placed on the support 7, located below the indenter 6. The sample 5 is placed on the upper slide plate 1 of the planar slide mechanism. After the indenter 6 moves downward to contact the sample 5 for indentation detection, the drive unit 4 drives the upper slide plate 1 to slide horizontally relative to the lower slide plate 2, and then the indenter moves downward to contact the sample 5 again to perform indentation detection at another indentation point.

[0047] 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 planar slide mechanism for an indentation instrument, characterized in that, include: The upper slide plate (1) is used to support the sample and is equipped with a sliding element (11). The lower slide plate (2) is located below the upper slide plate (1) and has a track (21) for the sliding member (11) to slide relative to each other. The track (21) at least enables the sliding member (11) to be positioned in the vertical direction. The pre-tightening unit (3) passes at least partially through the slider (11) and is connected to the upper slide plate (1) to form a pre-tightening force between the slider (11) and the upper slide plate (1) so that the upper slide plate (1) moves in the direction of the slider (11); The drive unit (4) is connected to the slider (11) and is used to drive the upper slide plate (1) and the lower slide plate (2) to slide horizontally relative to each other.

2. The planar slide mechanism for an indenter according to claim 1, characterized in that: The pre-tightening unit (3) includes at least a pre-tightening member (31) that passes through the sliding member (11) and is connected to the upper slide plate (1), and an elastic member (32) that abuts against the pre-tightening member (31) and the sliding member (11) respectively. The upper slide plate (1) is provided with a mounting hole (12), and the pre-tightening member (31) is connected to the mounting hole (12), and the connection length of the two is adjustable.

3. The planar slide mechanism for a indentation apparatus of claim 2, wherein: The pre-tightening unit (3) also includes a follower (33) located below the sliding member (11). The pre-tightening member (31) passes through the follower (33) and the sliding member (11) in sequence and is connected to the upper slide plate (1).

4. The planar slide mechanism for a indentation apparatus according to claim 3, wherein: The pre-tightening unit (3) also includes a positioning pin (34), which penetrates the sliding member (11) and is positioned and inserted at both ends on the upper sliding plate (1) and the follower (33).

5. The planar slide mechanism for a indentation apparatus of claim 3, wherein: The drive unit (4) includes a handle (41) extending from the side of the lower slide plate (2) and a drive member (42) connected to the handle (41), wherein the drive member (42) is in transmission cooperation with the follower member (33).

6. The planar slide mechanism for a indentation apparatus of claim 5, wherein: The outer wall of the drive member (42) forms an external thread (421), and the follower member (33) is provided with a mating part (43) with an internal thread. The drive member (42) and the mating part (43) are driven and engaged by the internal and external threads.

7. The planar slide mechanism for an indenter according to claim 2, characterized in that: The elastic element (32) is a disc spring.

8. The planar slide mechanism for a indentation apparatus of claim 4, wherein: The number of the positioning pins (34) is at least two, and the number of the preloads (31) is at least two, which are alternately distributed on the same straight line.

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