Torque testing device for pressure arm
The torque testing device, which uses an internal gear drive and a half-gear, solves the problem of uneven grinding of the pressure arm surface, achieves tight fit of strain gauges, reduces measurement errors, improves the accuracy and reliability of test data, simplifies the structure, and reduces maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-03-27
AI Technical Summary
In existing technologies, the surface of the pressure arm is not smooth due to manual grinding, which leads to poor adhesion of the strain gauges, making them prone to loosening and falling off, generating air bubbles, and affecting the accuracy and reliability of torque testing.
Design a torque testing device for a pressure arm, using an internal gear drive and a half gear to achieve stable and smooth grinding of the pressure arm surface, ensuring tight adhesion of strain gauges, reducing air bubble formation, and improving bonding strength.
It improves the bonding quality of strain gauges, reduces measurement errors, provides more reliable torque test data, simplifies the structure, reduces maintenance costs, and enhances the versatility and adaptability of the device.
Smart Images
Figure CN224051835U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to pressure arm torque test technical field, specifically be a kind of torque testing device for pressure arm. BACKGROUND
[0002] In the engineering practice of pressure arm torque test, strain gauge type torque test method becomes widely used technical means by virtue of its cost effectiveness and relatively high accuracy. The method pastes strain gauge on the surface of pressure arm, utilizes the sensing characteristics of strain gauge to stress and strain, converts the strain generated by pressure arm under the action of torque into electrical signal, and then obtains the torque value borne by pressure arm through data acquisition and processing.
[0003] However, in actual operation process, the current adoption of sandpaper manual polishing pressure arm surface exposes a series of problems to be solved. Manual polishing process greatly depends on the personal technical level and experience of operator, and the effects polished by different operators are significantly different. Even the same operator, due to the influence of various factors such as fatigue, it is also difficult to maintain the consistency and flatness of polishing all the time.
[0004] Such uneven polishing causes many adverse effects on the subsequent attachment of strain gauge. First, the uneven surface makes it impossible to achieve full and close adhesion between strain gauge and pressure arm. In those uneven areas, the adhesive cannot fully fill the gap, resulting in insufficient adhesion of strain gauge. During actual test, when pressure arm is subjected to torque and accompanying vibration dynamic factors, strain gauge is prone to looseness or even fall off, which not only interrupts the test process, but also affects the accuracy of test results due to incomplete data collection. Second, uneven surface is prone to air retention when pasting strain gauge, and then forms air bubbles. The existence of these air bubbles will interfere with the normal path of stress transmission, so that strain gauge cannot accurately perceive the real strain change of pressure arm. During the test process, air bubbles will also break or move due to the change of stress state, causing abnormal fluctuation of strain gauge output signal, which seriously affects the stability of test data. Third, uneven surface lacks accurate adhesion reference, so that strain gauge is difficult to ensure accurate position during pasting process. Position deviation will cause strain gauge to measure strain that is not the strain of the expected design position of pressure arm, so that the measurement result deviates from the true value, and cannot accurately reflect the actual torque condition of pressure arm.
[0005] The strain gauge adhesion issues caused by uneven grinding further negatively impacted torque testing. Firstly, because strain gauges cannot accurately sense strain, the torque values calculated based on strain measurements inevitably contain significant errors, failing to accurately reflect the torque experienced by the pressure arm under actual operating conditions. This leads to flawed decisions in pressure arm structural design optimization and performance evaluation, which rely on accurate torque data. Secondly, the instability of the strain gauges' operating state causes frequent fluctuations in test data. During continuous torque loading or unloading, the data exhibits abnormal jumps, failing to form a stable and smooth torque-strain curve. This not only increases the difficulty of data analysis but also reduces the reliability of the test data, significantly compromising the overall reliability of the torque test results.
[0006] In summary, the current method of manually polishing the surface of the pressure arm has become a key bottleneck restricting the improvement of the accuracy and reliability of strain gauge torque testing methods. In order to ensure the accuracy and reliability of the pressure arm torque test results, and thus provide solid data support for the design, manufacturing and performance optimization of the pressure arm, it is urgent to develop a new method or device that can effectively improve the surface polishing quality of the pressure arm, so as to overcome the many drawbacks of manual polishing in the existing technology.
[0007] Therefore, we propose a torque testing device for pressure arms to solve the above problems. Utility Model Content
[0008] (a) Technical problems to be solved
[0009] In view of the shortcomings of the prior art, the present invention provides a torque testing device for a pressure arm to solve the problems mentioned in the background art.
[0010] (II) Technical Solution
[0011] To achieve the above objectives, the present invention provides the following technical solution: a torque testing device for a pressure arm, comprising a workpiece to be tested, wherein a surface to be processed is formed on the upper surface of the workpiece to be tested, and a support bracket is provided on one side of the workpiece to be tested, wherein the workpiece to be tested can pass through the symmetrically arranged support brackets.
[0012] Preferably, a ratchet adjustment shaft is rotatably connected to the top of the support leg, and a main square frame is fixedly connected to the end of the ratchet adjustment shaft away from the support leg. A through guide hole is fixedly opened on the side wall of the main square frame.
[0013] Preferably, an internal gear drive component is movably connected inside the main frame component, and a half gear is fixedly connected to the bottom surface of the inner cavity of the main frame component via a motor.
[0014] As preferred, the inner tooth driving member outer end is fixedly connected with a workpiece processing member, and the workpiece processing member is internally provided with a polishing member storage chamber.
[0015] As preferred, the polishing member storage chamber inner cavity top wall is fixedly connected with a spring, and the spring bottom end is fixedly connected with a pushing piece.
[0016] As preferred, the pushing piece is provided below with a first abrasive paper and a second abrasive paper.
[0017] (Three) beneficial effects
[0018] Compared with the prior art, the utility model provides a torque testing device for pressure arm, has the following beneficial effects:
[0019] 1. The utility model discloses a design of the whole device, and after the stable and smooth polishing of the workpiece to be measured of the pressure arm in the torque testing process of the pressure arm, the following benefits and effects are brought to the testing:
[0020] Improve the quality of strain gauge pasting, make it closely adhere: the device can ensure that the surface of the pressure arm is smooth, so that the strain gauge can be in full and close contact with the pressure arm, the smooth surface is beneficial to the uniform distribution and full filling of the glue, greatly improves the pasting firmness of the strain gauge, avoids the test interruption or data anomaly caused by the strain gauge loosening and falling off in the testing process;
[0021] Reduce the generation of air bubbles: the stable and smooth polishing effectively reduces the air retention caused by the uneven surface, significantly reduces the probability of air bubbles generated when the strain gauge is pasted; this guarantees the smooth stress transmission between the strain gauge and the pressure arm, so that the strain gauge can accurately perceive the strain change of the pressure arm, and provides a more reliable data basis for the torque testing;
[0022] Reduce measurement error: as the quality of strain gauge pasting is improved, the perception of the strain of the pressure arm is more accurate. Based on the accurate strain measurement, the torque value obtained through the corresponding calculation formula is also more accurate, which can truly reflect the actual torque size of the pressure arm under different working conditions, and provide reliable data support for the subsequent pressure arm design optimization and performance evaluation.
[0023] 2. The utility model discloses the cooperation of the inner tooth driving member and the half gear in the design, and only two components can realize the reciprocating motion required for subsequent polishing work, which brings the following benefits and effects to the whole testing device:
[0024] Simplified structure: only two components, the internal tooth drive and the half gear, are used to build the core mechanism that realizes the reciprocating motion of polishing, which greatly reduces the number of parts compared to the traditional complex reciprocating motion mechanism. This not only reduces the complexity of the design, making the structure of the entire device more compact, easy to understand and grasp, but also makes the installation and debugging process more simple, reducing potential assembly errors and failure points;
[0025] Reduced maintenance cost: fewer components mean fewer wear and tear points and failure sources. During long-term use, the relatively simple motion of the internal tooth drive and the half gear reduces the probability of damage caused by complex friction and collision between components. Once a failure occurs, maintenance personnel can quickly locate the problem, and it is easier to replace or repair related components, effectively reducing the time, labor and material costs required for maintenance. At the same time, fewer parts also reduce the types and quantities of spare parts inventory, further saving costs;
[0026] Adaptability and flexibility; easy to adjust: by changing the parameters of the internal tooth drive and the half gear, such as gear modulus, number of teeth, diameter, the stroke, frequency and speed of reciprocating motion can be easily adjusted to adapt to pressure arms of different sizes, materials and polishing requirements. This flexibility allows the device to be applied in a variety of torque testing scenarios without the need to redesign complex motion mechanisms for each pressure arm, improving the device's versatility and applicability. BRIEF DESCRIPTION OF DRAWINGS
[0027] Figure 1 is the appearance view of the main structure of the utility model;
[0028] Figure 2 is the top view of the main structure of the utility model;
[0029] Figure 3 is the main structure of the utility model Figure 2 is the enlarged view of structure A;
[0030] Figure 4 is the side view of the main structure of the utility model;
[0031] Figure 5 is the main structure of the utility model Figure 4 is the enlarged view of structure B;
[0032] Figure 6 is the position distribution diagram of the first polishing sandpaper and the related structure of the surface to be processed after the workpiece processing piece is cut.
[0033] In the figure:
[0034] 1, the workpiece to be tested; 101, the surface to be processed; 2, the support foot; 3, the ratchet wheel adjusting rotating shaft; 4, the main body square frame; 5, the guide through hole; 6, the inner tooth driving part; 7, the half gear; 8, the workpiece processing part; 9, the polishing part storage chamber; 10, the spring; 11, the pushing piece; 12, the first polishing sandpaper; 13, the second polishing sandpaper. DETAILED DESCRIPTION
[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0036] The present application will be further described in detail below according to the drawings and embodiments.
[0037] EMBODIMENT
[0038] Please refer to Figures 1 to 6 The present application will be further described in detail below according to the drawings and embodiments.
[0039] A torque testing device for a pressure arm, comprising a workpiece to be tested 1, the upper surface of the workpiece to be tested 1 is formed with a surface to be processed 101, the workpiece to be tested 1 is provided with a support foot 2 on one side, the workpiece to be tested 1 can pass through between the symmetrically arranged support feet 2, the top of the support foot 2 is rotatably connected with a ratchet wheel adjusting rotating shaft 3, the end of the ratchet wheel adjusting rotating shaft 3 away from the support foot 2 is fixedly connected with a main body square frame 4, the side wall of the main body square frame 4 is fixedly provided with a through guide through hole 5, the main body square frame 4 is movably connected with an inner tooth driving part 6, the bottom surface of the inner cavity of the main body square frame 4 is fixedly connected with a half gear 7 through a motor, the outer end of the inner tooth driving part 6 is fixedly connected with a workpiece processing part 8, the inner cavity of the workpiece processing part 8 is provided with a polishing part storage chamber 9, the top wall of the inner cavity of the polishing part storage chamber 9 is fixedly connected with a spring 10, the bottom end of the spring 10 is fixedly connected with a pushing piece 11, the first polishing sandpaper 12 and the second polishing sandpaper 13 are arranged below the pushing piece 11.
[0040] Among them:
[0041] The surface to be processed 101 needs to be polished with sandpaper for the purpose of attaching strain gauges in the overall test work.
[0042] The ratchet wheel adjusting rotating shaft 3 is mainly used for stabilizing the main body square frame 4 after the inclination angle of the main body square frame 4 is adjusted.
[0043] The guide through hole 5 mainly provides guiding work for the movement of the inner tooth driving part 6.
[0044] The teeth of the inner tooth driving member 6 are matched with the teeth of the half gear 7.
[0045] The half gear 7 is driven by a driving motor.
[0046] A plurality of sand papers for polishing can be stored in the polishing member storage chamber 9.
[0047] The spring 10 is mainly used for pushing the pushing sheet 11, so that the sand paper under the pushing sheet 11 is tightly attached to the surface 101 to be processed on the workpiece 1.
[0048] Working principle:
[0049] In the processing stage of the surface 101 to be processed of the workpiece 1 in the test work, first, the support foot 2 is moved, and the workpiece 1 is located between the symmetrically arranged support feet 2, and then the main body square member 4 is adjusted by the ratchet adjusting shaft 3 according to the position of the surface 101 to be processed, so that the workpiece processing member 8 connected to the front end of the main body square member 4 is in parallel with the surface 101 to be processed.
[0050] Further, after the position is adjusted, the motor driving the half gear 7 is started, and the motor driving the half gear 7 is started. Figure 3 After the motor is started, the half gear 7 rotates counterclockwise, and with the rotation of the half gear 7, the half gear 7 moves the inner tooth driving member 6 to the left through the teeth in the inner tooth driving member 6; further, with the gradual left movement of the inner tooth driving member 6, since the half gear 7 has only half of the gear, finally the gear of the half gear 7 will not mesh with the teeth on one side of the inner tooth driving member 6.
[0051] Further, with the continuous rotation of the half gear 7, the teeth of the half gear 7 will mesh with the teeth on the other side of the inner tooth driving member 6, and at this time the inner tooth driving member 6 will move to the right in this meshing; in this way, the inner tooth driving member 6 will realize left and right reciprocating motion.
[0052] Further, in the above left and right movement process, the inner tooth driving member 6 will bring the first polishing sand paper 12 in the polishing member storage chamber 9 opened in the workpiece processing member 8 to left and right reciprocating polishing of the surface 101 to be processed of the workpiece 1, and in this process, the spring 10 and the pushing sheet 11 assist the first polishing sand paper 12 to be tightly attached to the surface 101 to be processed.
[0053] Further, through the design of the overall device, the pressure arm workpiece 1 to be tested is stably and evenly polished during the pressure arm torque test, which improves the test strain gauge paste quality and makes it tightly adhere. The device can ensure the flatness of the pressure arm surface, so that the strain gauge can be in full and close contact with the pressure arm. The flat surface is conducive to uniform distribution and full filling of the glue, greatly improving the paste firmness of the strain gauge, and avoiding test interruption or data anomaly caused by strain gauge loosening or falling off during the test;
[0054] Reduce air bubbles; stable and even polishing effectively reduces the air retention caused by the uneven surface, significantly reduces the probability of air bubbles when pasting the strain gauge; this ensures smooth stress transmission between the strain gauge and the pressure arm, so that the strain gauge can accurately perceive the strain change of the pressure arm, providing more reliable data basis for torque test;
[0055] Reduce measurement error; due to the improvement of the strain gauge paste quality, its perception of the strain of the pressure arm is more accurate. Based on accurate strain measurement, the torque value obtained through the corresponding calculation formula is also more accurate, which can truly reflect the actual torque size of the pressure arm under different working conditions, and provide reliable data support for subsequent pressure arm design optimization and performance evaluation;
[0056] Further, through the cooperation of the inner tooth driving part 6 and the half gear 7 in the design, only two components are needed to realize the reciprocating motion required for subsequent polishing work, which simplifies the structure of the entire test device, only using the inner tooth driving part 6 and the half gear 7 two components; to build the core mechanism to realize the polishing reciprocating motion, compared with the traditional complex reciprocating motion mechanism, the number of parts is greatly reduced; this not only reduces the complexity of the design, makes the structure of the entire device more compact, easy to understand and grasp, but also makes the installation and debugging process more simple, reduces potential assembly errors and failure points;
[0057] Reduce maintenance cost: fewer components mean lower wear and tear and failure sources. During long-term use, the relatively simple motion cooperation of the inner tooth driving part 6 and the half gear 7 reduces the probability of damage caused by complex friction and collision between components. Once a fault occurs, due to the simple structure, maintenance personnel can quickly locate the problem, and it is easier to replace or repair related components, effectively reducing the time, labor and material costs required for maintenance. At the same time, fewer parts also reduce the types and quantities of spare parts inventory, further saving costs;
[0058] Adaptability and flexibility, easy to adjust; by changing the parameters of the inner tooth driving part 6 and the half gear 7, such as gear modulus, number of teeth, diameter, the stroke, frequency and speed of reciprocating motion can be easily adjusted to adapt to pressure arms of different sizes, materials and polishing requirements; such flexibility enables the device to be applied in a variety of different torque test scenarios, without the need to redesign complex motion mechanisms for each pressure arm, improving the versatility and applicability of the device.
[0059] The above working process please refer to Figures 1 to 6 .
[0060] It should be noted that in this paper, such as the first and second relationship terms are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the term "includes", "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "includes a" does not exclude the presence of additional identical elements in the process, method, article or device including the element.
[0061] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A torque testing device for a pressure arm, comprising a workpiece (1) to be tested, characterized in that: The upper surface of the workpiece (1) to be tested is formed with a surface to be treated (101), and the workpiece (1) is provided with support legs (2) on one side, and the workpiece (1) can pass between the symmetrically arranged support legs (2).
2. A torque testing device for a pressure arm as claimed in claim 1, characterized in that: The top of the support leg (2) is rotatably connected with a ratchet adjusting rotating shaft (3), and the end of the ratchet adjusting rotating shaft (3) away from the support leg (2) is fixedly connected with a main body square frame (4), and the side wall of the main body square frame (4) is fixedly provided with a through guide through hole (5).
3. A torque testing device for a pressure arm as claimed in claim 2, characterised in that: The inner tooth driving member (6) is movably connected in the main body square frame (4), and the half gear (7) is fixedly connected in the inner cavity of the main body square frame (4) through the motor.
4. A torque testing device for a pressure arm as claimed in claim 3, characterized in that: The workpiece processing member (8) is fixedly connected to the outer end of the inner tooth driving member (6), and the workpiece processing member (8) is provided with a polishing member storage chamber (9) inside.
5. A torque testing device for a pressure arm as claimed in claim 4, characterised in that: The spring (10) is fixedly connected to the bottom end of the spring (10), and the spring (10) is fixedly connected to the bottom end of the spring (10).
6. A torque testing device for a pressure arm as claimed in claim 5, characterised in that: The first polishing sandpaper (12) and the second polishing sandpaper (13) are arranged below the pushing piece (11).