Positioning mechanism for weighing elastomer pressure test

Abstract

The utility model discloses a positioning mechanism for pressure test of weighing elastic body, including positioning seat, support platform subassembly and driving disc, and driving disc rotatable installation is in positioning seat top surface. Positioning seat top surface is equipped with a plurality of ear holder, and each ear holder rotatory connection clamping lever, and clamping lever is installed on screw thread adjusting screw rod, and the end of adjusting screw rod is equipped with the resistance convex strip sliding resistance of driving disc outer periphery, realizes radial location clamping. Support platform subassembly includes column rod and bearing platform, and is equipped with spiral screw guide groove on column rod, and the inside of driving disc is provided with slide pin, and slide pin and screw guide groove slide fit, and the bottom of driving disc is equipped with ring guide tooth, and is engaged transmission with the guide tooth on positioning seat. When column rod is down in pressure test process, and through slide pin guide drives driving disc deflection, realizes the self -adaptation of weighing elastic body and leads to the location of positioning. The utility model discloses compact structure, easy operation has good adaptability and clamping stability, is applicable to the pressure test positioning of a variety of specifications of weighing elastic body application.

Description

Technical Field

[0001] This utility model relates to the field of weighing elastomer testing equipment, specifically a positioning mechanism for weighing elastomer pressure testing. Background Technology

[0002] In the manufacturing and calibration of load cells, the weighing elastomer (such as shear beam, column, S-shaped, etc.) is the core sensitive element and often needs to undergo pressure loading tests to verify its mechanical properties and structural integrity. In such pressure tests, to ensure the accuracy of the force direction and the stability of the force point on the weighing elastomer during loading, and to avoid off-center loading or displacement during the test, certain positioning and clamping mechanisms are usually used to limit and guide it.

[0003] In existing technologies, common weighing elastomer positioning devices have relatively simple structures, mainly relying on mechanical jaws, screw plates, or positioning sleeves to achieve coarse clamping and constraint. For example, some structures use 3-4 radially adjustable fastening bolts installed around the test platform, with the bolt heads manually adjusted to press against the outer wall of the elastomer to achieve limiting support. Other structures use a fixed bracket with a central hole guide rod inserted into the central hole of the elastomer to achieve initial positioning.

[0004] However, the aforementioned existing technologies still have the following obvious problems and shortcomings:

[0005] Poor adaptability and lack of versatility: Due to the wide variety of types and specifications of weighing elastomers, existing positioning devices usually need to be customized according to the model, resulting in poor versatility; once the elastomer model is changed, the original device often cannot continue to be used.

[0006] Low positioning accuracy and easy to generate off-center load: Traditional manual screw tightening method is prone to problems such as eccentricity and misalignment due to operation error during clamping, which causes off-center load on the elastomer during the test pressure, affecting the test accuracy or even damaging the device.

[0007] Cumbersome clamping and large repeated positioning errors: The existing structure lacks rapid adjustment and adaptive matching functions, the clamping steps are complicated, the positioning time is long, and the repeated clamping error is large, which reduces the detection efficiency.

[0008] Lack of dynamic guidance and linkage function: During the pressure test, the elastic body will displace due to the load. Existing devices are generally rigid limiting structures, which cannot adapt to dynamic displacement, are prone to interference, and lack flexible guidance and adjustment capabilities.

[0009] In summary, current weighing elastomer pressure testing positioning devices still need further improvement in terms of structural adaptability, clamping reliability, ease of operation, and dynamic coordination performance. There is an urgent need for an improved positioning mechanism with adaptive guidance, rapid limiting, universal structure, and high repeatability to meet the efficient and stable positioning requirements of various types of weighing elastomers during pressure testing. Utility Model Content

[0010] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0011] Therefore, the technical solution adopted by this utility model is: a positioning mechanism for weighing elastomer pressure testing, including a positioning seat, a support assembly and a drive disk, which can realize rapid adaptation and clamping, downward guiding and matching, and self-resetting and springback operation of weighing elastomers of different structural types and size specifications. It has a compact structure, convenient operation, high repeatability and positioning accuracy, and is suitable for various engineering pressure testing scenarios.

[0012] Specifically, this utility model adopts the following overall structural scheme:

[0013] The positioning mechanism includes a positioning seat, a support assembly, and a drive disc rotatably mounted on top of the positioning seat. Several lugs are arranged circumferentially on the top of the positioning seat, each lug rotatably connected to a clamping rod. An adjusting screw is threaded onto the clamping rod, the end of which can slide into contact with abutment strips on the outer periphery of the drive disc to achieve radial limiting and clamping. The support assembly includes a column and a support platform on its top. A spiral guide groove is provided on the column, and a sliding pin is slidably fitted inside the drive disc. The sliding pin is nested in the guide groove. During the pressure test, the column moves downward, causing the sliding pin to move, thereby causing the drive disc to deflect. Ring guide teeth are provided on the bottom surface of the drive disc, meshing with guide teeth on the top of the positioning seat to form a stable linkage.

[0014] In a preferred example, the column is vertically arranged on the surface of the positioning seat and can slide up and down in its hole. The bottom end of the column contacts the positioning seat through a spring structure and automatically returns to its original position after the pressure test is completed. Specifically, this structure realizes the support and automatic reset function of the symmetrical weight elastic body, improving the test clamping efficiency.

[0015] In a preferred example, the outer periphery of the drive disk is provided with several anti-convex strips in the shape of arc convex surfaces. The center distance of each anti-convex strip gradually increases along its extension direction. The end of the adjusting screw slides in contact with it. Specifically, by adjusting the position of the adjusting screw, different bias forces can be applied to the drive disk to achieve multi-point adaptive limiting clamping of elastic bodies of different sizes, thereby improving clamping stability and adaptability.

[0016] In a preferred example, the column surface is provided with a spiral guide groove along the spiral direction, and a sliding pin is provided on the inner side of the drive disk. The sliding pin and the spiral guide groove correspond one-to-one and are nested together. Specifically, when the column is pressed down, the sliding pin guides the drive disk to deflect along the spiral groove, so that the entire clamping system has the ability to adaptively limit and adjust, effectively avoiding clamping off-center load.

[0017] In a preferred example, the bottom of the drive disk is provided with ring guide teeth, and the top surface of the positioning seat is provided with multiple guide teeth. Each guide tooth is evenly distributed along the circumferential direction, and the guide teeth mesh with the ring guide teeth for transmission. Specifically, this structure ensures that the rotation of the drive disk maintains coaxial deflection and stable guidance during the vertical pressure test, thereby improving the alignment accuracy of the limiting structure and the weighing elastic body.

[0018] In a preferred example, the adjusting screw is disposed through the inside of the clamping rod and arranged in a radial direction. Its end is located below the connection point between the lug and the clamping rod and slides in contact with the anti-protrusion strip. Specifically, this design improves the stability of the adjusting force transmission path, reduces the risk of eccentric clamping, and improves structural stability and positioning repeatability.

[0019] Through the combined effect of the above structure, this utility model is not only applicable to various common weighing elastomer pressure testing scenarios, but also has good versatility, positioning accuracy and ease of operation, and is particularly suitable for high-precision, high-frequency testing occasions.

[0020] The beneficial effects achieved by this utility model are as follows:

[0021] 1. In this utility model, by setting a slidingly fitted column and a supporting platform, it can adapt to weighing elastomers of different sizes and structural forms, and achieve accurate initial positioning and stable support before pressure testing, thereby improving the versatility and adaptability of clamping and positioning.

[0022] 2. In this utility model, the drive disk is provided with a sliding pin that cooperates with the guide groove of the column rod. During the pressure test, the drive disk can be driven to produce an adaptive deflection action by the gravity and downward pressure of the weighing elastic body. In conjunction with the ring guide teeth set at its bottom and the guide teeth of the positioning seat, a deflection limit control method based on the synchronous linkage of guide sliding and meshing is formed, which effectively improves the automation level of positioning and guidance during the clamping process. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model;

[0024] Figure 2 This is an exploded structural diagram of one embodiment of the present invention;

[0025] Figure 3 This is a partial cross-sectional structural diagram of one embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the support assembly and drive disk structure according to an embodiment of the present invention.

[0027] Figure label:

[0028] 100. Positioning seat; 110. Ear bracket; 120. Clamping rod; 121. Adjusting screw; 130. Guide tooth;

[0029] 200. Support assembly; 210. Column; 220. Foundation; 211. Rotary guide groove;

[0030] 300. Drive disc; 310. Ring guide tooth; 320. Anti-convex strip; 330. Sliding pin. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0032] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0033] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a positioning mechanism for weighing elastomer pressure testing.

[0034] Combination Figures 1-4 As shown, the present invention provides a positioning mechanism for weighing elastomer pressure testing, including a positioning seat 100, a support assembly 200 and a drive disk 300, wherein the drive disk 300 is rotatably mounted on the top surface of the positioning seat 100.

[0035] The positioning seat 100 is a rectangular metal platform structure with several ear brackets 110 evenly distributed circumferentially on its top surface for providing clamping support. Each ear bracket 110 is rotatably connected to a clamping rod 120 on its outer side. The clamping rod 120 can rotate relative to the ear bracket 110 via a pivot shaft to achieve centripetal clamping or release. Each clamping rod 120 has a threaded hole in its center for mounting an adjusting screw 121. The adjusting screw 121 is radially oriented, with one end passing through the clamping rod 120 and extending inwards, and its end slidingly contacting the outer periphery of the drive disc 300.

[0036] On the outer periphery of the drive disk 300, multiple arc-shaped convex abutment strips 320 are provided, with the center distance of each abutment strip 320 gradually increasing along its extension direction. Each abutment strip 320 contacts a corresponding adjusting screw 121, allowing for limiting and fine-tuning of the drive disk 300 by tightening or loosening the adjusting screw 121. The arc-shaped structure of the abutment strips 320 enables the drive disk 300 to deflect and adjust under force, improving the fitting accuracy of the symmetrical elastic body.

[0037] The support assembly 200 is disposed in the central region of the positioning seat 100, and includes a vertically arranged column 210. The lower end of the column 210 can be slidably inserted into the central hole of the positioning seat 100. A spring structure (not shown in the diagram) is provided between the bottom end of the column 210 and the positioning seat 100 for automatic reset of the column 210 after loading. A support platform 220 is fixedly installed on the top of the column 210. The support platform 220 is a circular flat plate structure used to support the weighing elastic body. Multiple spiral guide grooves 211 are formed on the side wall of the column 210 along the spiral direction.

[0038] The inner side of the drive disk 300 is provided with multiple sliding pins 330, which are slidably nested in the guide groove 211 of the column rod 210 and are tightly engaged with it. When the column rod 210 is pressed down during the test pressure process, the sliding pins 330 slide along the guide groove 211, thereby causing the drive disk 300 to deflect and rotate in the horizontal direction. The bottom of the drive disk 300 is provided with a ring of guide teeth 310, which mesh with multiple guide teeth 130 evenly arranged in the circumferential direction on the top surface of the positioning seat 100, thereby providing guidance and limiting function when the drive disk 300 deflects, preventing its deviation and loosening.

[0039] Specifically, in use, the weighing elastomer is placed on the top surface of the support platform 220, and the ends of the elastomers are pressed against the anti-protrusion strips 320 of the drive disc 300 by rotating multiple adjusting screws 121, thereby achieving initial positioning and clamping of the elastomer. As the external pressure testing device applies an axial load, the column rod 210 undergoes downward displacement under pressure, and the sliding pin 330 guides it along the rotary guide groove 211, achieving synchronous deflection of the drive disc 300. Finally, stable guidance and positioning are achieved through the cooperation of the ring guide teeth 310 and the guide teeth 130. Throughout the process, the positioning structure can be adaptively adjusted to accommodate weighing elastomers of different sizes and structures, ensuring stability and centering during pressure testing.

[0040] In one embodiment, such as Figure 3 As shown, the adjusting screw 121 is radially inserted into the clamping rod 120, located below the connection point between the ear bracket 110 and the clamping rod 120, and slides in contact with the abutment strip 320 on the outer edge of the drive disc 300. The multiple adjusting screws 121 are evenly distributed, resulting in a reasonable distribution of clamping force, making operation more convenient and clamping more reliable.

[0041] Furthermore, such as Figure 2 and Figure 4 As shown, the number of sliding pins 330 is equal to the number of rotary guide grooves 211, and they are arranged in an axial one-to-one correspondence. Each sliding pin 330 is slidably fitted into the rotary guide groove 211 of the column rod 210 through its side nesting. The rotary guide groove 211 is spirally arranged, so that the sliding pin 330 generates tangential motion during the downward movement of the column rod 210, thereby driving the drive disk 300 to achieve angular deflection.

[0042] In addition, in a preferred embodiment, the guide teeth 130 are evenly distributed around the column 210, and their tooth surfaces mesh with the lower ring guide teeth 310 of the drive disk 300 to form a reliable gear-type linkage structure, thereby achieving efficient rotational guidance function and enhancing overall positioning accuracy.

[0043] With the above-mentioned structural design, this utility model can effectively adapt to weighing elastomers of different sizes and types, realize quick clamping, adaptive limit and automatic reset, avoid manual intervention and repeated positioning errors, and has a compact overall structure, convenient operation and reliable positioning, which significantly improves the clamping efficiency of pressure testing and the versatility of the system.

[0044] Working principle and usage process of this utility model:

[0045] Initial installation and pre-positioning: The weighing elastomer is placed on the support platform 220 of the support assembly 200; the column rod 210 is vertically inserted into the center hole of the positioning seat 100 and can slide relative to the drive disk 300; the geometric structure of the weighing elastomer above the support platform 220 is matched to achieve initial support and positioning.

[0046] The positioning and clamping mechanism operates as follows: By manually rotating the adjusting screw 121, its end slides into contact with the anti-protrusion strip 320 on the outer periphery of the drive disc 300, thus performing initial positioning and clamping of weighing elastic bodies of different specifications.

[0047] Downward pressure guidance and adaptive coordination: When the pressure test is performed, the weighing elastic body is compressed and pushes the column rod 210 downward; the spiral guide groove 211 on the column rod 210 engages with the sliding pin 330, and the sliding pin 330 guides along the spiral guide groove 211 to realize the deflection movement of the drive disk 300; the ring guide tooth 310 on the drive disk 300 engages with the guide tooth 130 on the positioning seat 100 to realize stable deflection guidance.

[0048] This structure enables the elastic body and positioning mechanism to adapt to each other, as well as to lock and release the process.

[0049] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0050] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A positioning mechanism for testing a weighing elastomer, characterized in that, include: The positioning base (100), the support assembly (200), and the drive disk (300) rotatably mounted on the surface of the positioning base (100) are provided. The top surface of the positioning base (100) is provided with a plurality of ear brackets (110). Each ear bracket (110) is rotatably mounted with a clamping rod (120). The surface of the clamping rod (120) is threaded with an adjusting screw (121), and one end of the adjusting screw (121) slides against the outer periphery of the drive disk (300). The outer periphery of the drive disk (300) is provided with abutment strips corresponding one-to-one with each of the adjusting screws (121). (320) The support assembly (200) includes a column (210) and a support (220) fixed to the top surface of the column (210). A rotary guide groove (211) is provided on the surface of the column (210). A sliding pin (330) is provided on the inner side of the drive disk (300) and is slidably sleeved on the surface of the rotary guide groove (211). A guide tooth (130) is rotatably mounted on the top surface of the positioning seat (100). A ring guide tooth (310) is provided on the bottom surface of the drive disk (300), and the inner side of the ring guide tooth (310) meshes with the surface of the guide tooth (130) for transmission.

2. The positioning mechanism according to claim 1, characterized in that, The column rod (210) is arranged vertically on the surface of the positioning seat (100) and is slidably sleeved on the inner side of the drive disk (300). The bottom surface of the column rod (210) is provided with a spring that contacts the surface of the positioning seat (100).

3. The positioning mechanism according to claim 1, characterized in that, The spiral guide grooves (211) are arranged in a spiral direction, and the sliding pins (330) are arranged in a one-to-one correspondence with each of the spiral guide grooves (211).

4. The positioning mechanism according to claim 1, characterized in that, The anti-convex strip (320) is arc-shaped and convex, and the distance between the anti-convex strip (320) and the center of the drive disk (300) gradually increases from one end to the other.

5. The positioning mechanism according to claim 1, characterized in that, The guide teeth (130) are evenly distributed in a circumferential direction about the axis of the rod (210), and the inner side of the ring guide teeth (310) meshes with the inner side of each guide tooth (130) for transmission.

6. The positioning mechanism according to claim 1, characterized in that, The adjusting screw (121) is disposed through the clamping rod (120), and the adjusting screw (121) is arranged radially and slides against the surface of the anti-protrusion strip (320). The adjusting screw (121) is located below the connection point between the ear bracket (110) and the clamping rod (120).

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