Resistance strain gauge tooling fixture with positioning function

Abstract

This invention relates to the field of fixture technology, and more particularly to a resistance strain gauge tooling fixture with positioning function. The technical solution includes: a support, with a magnet rotatably connected to the top center of the support, and two symmetrically arranged left and right centering parts on the side of the support; an adjusting component, including a housing, a roller, a slider, an extension plate, and a connecting rod, wherein the end of the roller is rotatably connected to the housing, the side of the slider is slidably connected to the housing, the side of the slider is fixedly mounted with an extension plate, the end of the extension plate is hinged to a connecting rod, and the end of the connecting rod is provided with a front and rear centering part. This invention uses multiple first electric push rods that extend asynchronously. The housing at the end of the first electric push rods pushes the ends of the resistance strain gauges placed front and rear, causing the resistance strain gauges to rotate and change the front-and-rear placement to a left-and-right placement, adjusting the placement of the resistance strain gauges to correspond to the processing point of the processing device.

Description

Technical Field

[0001] This invention relates to the field of fixture technology, and in particular to a resistance strain gauge tooling fixture with positioning function. Background Technology

[0002] A resistance strain gauge is a transducer that converts strain, i.e., dimensional change, on an engineering component into resistance change. The resistance strain gauge is installed on the surface of the component. When the component is loaded, the small deformation (elongation or shortening) produced on the surface will cause the sensitive grid of the strain gauge to deform accordingly, and the resistance of the strain gauge will change. By measuring this change in resistance, the strain on the surface of the component and the corresponding stress can be calculated according to the formula.

[0003] In the prior art, the resistance strain gauge fixture is pushed by an electric push rod to fix the resistance strain gauge in place. The resistance strain gauge is fixed in position during the processing of the resistance strain gauge in the processing device to prevent it from moving and being unable to be processed to the required position.

[0004] When processing resistance strain gauges, there are two placement states: horizontal placement and vertical placement. Existing resistance strain gauge fixtures can only fix resistance strain gauges with the correct placement angle, and cannot adjust and fix resistance strain gauges with incorrect placement, resulting in the resistance strain gauge not corresponding to the processing point of the processing device. Summary of the Invention

[0005] The purpose of this invention is to address the problem in the prior art where resistance strain gauge fixtures cannot be fixed in the wrong position, and to propose a resistance strain gauge tooling fixture with positioning function.

[0006] The technical solution of the present invention: a resistance strain gauge fixture with positioning function, comprising: a bracket, wherein a magnet is rotatably connected to the top center of the bracket, and two symmetrically arranged left and right centering parts are provided on the side of the bracket;

[0007] The adjusting component includes a box body, a roller, a slider, an extension plate, and a connecting rod. The end of the roller is rotatably connected to the box body, the side of the slider is slidably connected to the box body, the side of the slider is fixedly mounted with an extension plate, the end of the extension plate is hinged to a connecting rod, the end of the connecting rod is provided with a front and rear centering member, and two boxes are provided, with the front and rear centering member provided on the opposite side of the two boxes.

[0008] One of the left and right centering components is fixedly connected to the side of the box body, and the other left and right centering component is fixedly installed with a plate. The slider is located on the extension line of the plate, the magnet is located between the two boxes, and a resistance strain gauge is placed on the top of the magnet.

[0009] Optionally, a protrusion is fixedly installed on the side of the slider, and a groove for sliding the protrusion is provided inside the box. A return spring is elastically connected between the protrusion and the box and in the groove located inside the box.

[0010] Optionally, two sliders are slidably connected to one of the boxes, and two parallel telescopic rods are fixedly installed inside the box. The ends of the telescopic rods are provided with front and rear centering parts, and there is a gap between the two sliders to allow the telescopic rods to move.

[0011] Optionally, the outer wall of the roller is in contact with the resistance strain gauge, the slider is a polygonal column or a cylinder, and the cross-sectional shape of the insert plate is the same as the cross-sectional shape of the slider.

[0012] Optionally, the front and rear centering components include a support plate, a pressure plate, and a contact switch. A square groove is provided on the side of the support plate, and the pressure plate slides in the square groove. The side of the support plate facing the pressure plate is fixedly connected to the contact switch, and the side of the support plate is fixedly connected to the telescopic rod.

[0013] Optionally, a guide rod is fixedly installed on the side of the pressure plate facing the support plate, the outer wall of the guide rod is slidably connected to the support plate, a limit plate is fixedly installed at the end of the guide rod, and the pressure plate is elastically connected to the support plate through a spring sheet.

[0014] Optionally, a protective block is fixedly installed on the side of the tray, the protective block wraps around the contact switch, and the end face of the protective block is flush with the end face of the contact switch.

[0015] Optionally, the left and right centering components include a first electric push rod, a second electric push rod, and a backing plate. The bracket has an internal cavity. The first electric push rod is disposed in the cavity and its end is fixedly connected to the bracket. The second electric push rod is fixedly installed on the side of the bracket, and its end is fixedly installed to the backing plate.

[0016] Optionally, a pressure sensor is fixedly installed on the side of the abutment plate. The first electric push rod is provided in multiple and evenly distributed on both sides of the magnet. The end of the first electric push rod located on the left side of the magnet is fixedly connected to the insert plate, and the end of the first electric push rod located on the right side of the magnet is fixedly connected to the box body. The contact switch is electrically connected to the first electric push rod and the second electric push rod.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects:

[0018] This invention uses multiple first electric push rods that extend asynchronously. The first electric push rod with a housing at its end extends asynchronously first, avoiding the simultaneous movement of multiple first electric push rods that would push the resistance strain gauge. The housing at the end of the first electric push rod pushes the ends of the resistance strain gauges placed in front and behind. The resistance strain gauge drives the magnet to rotate, changing the front-to-back placement to left-to-right placement. This allows the position of the resistance strain gauge to be adjusted before positioning, so that the placement state of the clamped and positioned resistance strain gauge corresponds to the processing point of the processing device.

[0019] Furthermore, after the position of the resistance strain gauge is adjusted by calibrating the housing, the front and rear centering parts inside the housing are pushed out. The two front and rear centering parts are used to clamp the resistance strain gauge, causing the resistance strain gauge to move and thus center its position in the front and rear, achieving the effect of front and rear centering. The first electric push rod extends and contacts the resistance strain gauge through the abutment plate. The two first electric push rods are used to achieve centering in the left and right directions, thus achieving the effect of centering.

[0020] Furthermore, when the two pressure plates clamp the resistance strain gauge simultaneously, the pressure plate will be pressed into the support plate by the resistance strain gauge. When the pressure plate contacts the contact switch, the first electric push rod stops moving to avoid excessive compression. It can clamp and fix resistance strain gauges of different sizes. Attached Figure Description

[0021] Figure 1 A schematic diagram of the tooling fixture of the present invention is shown from the right front.

[0022] Figure 2 A schematic diagram of the tooling fixture of the present invention is shown from the left front.

[0023] Figure 3 A schematic diagram of a magnet structure according to an embodiment of the present invention is provided;

[0024] Figure 4 A schematic diagram of the adjustment component structure according to an embodiment of the present invention is provided;

[0025] Figure 5 A rear top sectional view of the box structure according to an embodiment of the present invention is provided;

[0026] Figure 6 A front sectional view of the box structure according to an embodiment of the present invention is provided;

[0027] Figure 7 A top sectional view of the box structure according to an embodiment of the present invention is provided;

[0028] Figure 8 Give Figure 7 Enlarged schematic diagram of the guide rod structure in part A.

[0029] Reference numerals: 1. Bracket; 2. Magnet; 3. Left and right centering component; 31. First electric push rod; 32. Second electric push rod; 33. Support plate; 4. Insert plate; 5. Adjusting component; 51. Box body; 52. Roller; 53. Slider; 54. Protrusion; 55. Return spring; 56. Extension plate; 57. Connecting rod; 58. Telescopic rod; 6. Front and rear centering component; 61. Support plate; 62. Pressure plate; 63. Spring sheet; 64. Guide rod; 65. Limiting plate; 66. Protective block; 67. Contact switch. Detailed Implementation

[0030] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0031] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0032] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] Example 1

[0036] In order to automatically adjust the placement of the resistance strain gauge from a front-to-back position to a left-to-right position, so that the position of the processing device corresponds to the position of the resistance strain gauge that needs to be processed.

[0037] The resistance strain gauge fixture with positioning function proposed in this embodiment, such as... Figure 1 As shown, the device includes a support 1, a magnet 2 rotatably connected to the top center of the support 1, and two symmetrically arranged left and right centering parts 3 on the side of the support 1. A resistance strain gauge is placed on the top of the magnet 2. When the resistance strain gauge is placed on the top of the support 1, the magnet 2 uses its magnetic force to attract the resistance strain gauge to its top, thus initially fixing its position, so that the left and right centering parts 3 can touch the resistance strain gauge when moving.

[0038] like Figure 2 and 3 As shown, it also includes an adjusting component 5, which includes a housing 51 and a roller 52. The left and right centering components 3 include a first electric push rod 31, a second electric push rod 32, and a stop plate 33. The support 1 has an internal cavity. The first electric push rod 31 is disposed within the cavity and its end is fixedly connected to the support 1. The second electric push rod 32 is fixedly installed on the side of the support 1, and its end is fixedly installed to the stop plate 33. Multiple first electric push rods 31 are evenly distributed on both sides of the magnet 2. A plate 4 is fixedly installed at the end of the first electric push rod 31 located on the left side of the magnet 2, and the end of the first electric push rod 31 located on the right side of the magnet 2 is fixedly connected to the housing 51. The slider 53 is located on the extension line of the plate 4. When the housing 51 and the plate 4 move towards each other by extending the first electric push rod 31, the plate 4 will insert into the housing 51. The roller 52 on the housing 51 reduces the resistance between the housing 51 and the strain gauge to prevent jamming.

[0039] All first electric push rods 31 extend asynchronously, with the first electric push rod 31 connected to the box 51 at the end moving asynchronously first. When the first electric push rod 31 is fully extended, it can move the box 51 to the center line position of the bracket 1, thus avoiding the first electric push rods 31 moving simultaneously and pushing the resistance strain gauges placed in front and behind, and pushing the resistance strain gauges off the magnet 2.

[0040] When the strain gauge extends asynchronously, the strain gauge is pushed by the box 51 at the end of the first electric push rod 31. As the magnet 2 forms an integral part with the strain gauge under the influence of magnetic force, the strain gauge rotates due to the push of the box 51. The strain gauge and the magnet 2 rotate simultaneously, adjusting the placement state of the strain gauge, that is, the orientation of the strain gauge, changing the strain gauge from the front-back orientation to the left-right orientation.

[0041] In this embodiment, multiple first electric push rods 31 extend asynchronously. The first electric push rod 31 with a box 51 at its end extends asynchronously first to avoid multiple first electric push rods 31 moving simultaneously and pushing the resistance strain gauge. The box 51 at the end of the first electric push rod 31 pushes the ends of the resistance strain gauges placed in front and behind. Since the magnet 2 attracts the resistance strain gauge to form an integral part, when one end of the resistance strain gauge is squeezed, the resistance strain gauge and the magnet 2 will rotate simultaneously, changing the front-to-back placement to the left-to-right placement.

[0042] Example 2

[0043] After adjusting the placement of the resistance strain gauge, center it in the front-to-back direction, adjust its front-to-back position and align it before clamping and fixing it.

[0044] Based on Example 1, this example proposes a resistance strain gauge fixture with positioning function, such as... Figure 5-7 As shown, the adjusting component 5 also includes a slider 53, an extension plate 56, and a connecting rod 57. The end of the roller 52 is rotatably connected to the box body 51, the side of the slider 53 is slidably connected to the box body 51, the side of the slider 53 is fixedly mounted with the extension plate 56, the end of the extension plate 56 is hinged with the connecting rod 57, the end of the connecting rod 57 is provided with a front and rear centering member 6, there are two boxes 51, the front and rear centering member 6 is provided on the opposite side of the two boxes 51, the side of the slider 53 is fixedly mounted with a protrusion 54, the inside of the box body 51 is provided with a groove for the protrusion 54 to slide, and a return spring 55 is elastically connected between the protrusion 54 and the box body 51 and in the groove inside the box body 51.

[0045] After the first electric push rod 31 of the end-connected housing 51 has moved, the first electric push rod 31 of the end-connected insert plate 4 begins to move. The insert plate 4 moves and inserts into the housing 51, pushing the slider 53. The slider 53 drives the protrusion 54 to slide along the inner wall of the housing 51. The protrusion 54 compresses the return spring 55, which is used to reset the protrusion 54 and the slider 53. The outer wall of the roller 52 is in contact with the resistance strain gauge. The slider 53 is either a polygonal cylinder or a cylindrical cylinder. The cross-sectional shape of the insert plate 4 is the same as that of the slider 53.

[0046] like Figure 2-7 As shown, two sliders 53 are slidably connected on a box 51. Two parallel telescopic rods 58 are fixedly installed inside the box 51. The ends of the telescopic rods 58 are provided with front and rear centering parts 6. There is a gap between the two sliders 53 to allow the telescopic rods 58 to move, so as to avoid the sliders 53 from contacting the telescopic rods 58 and getting stuck together when they move.

[0047] When the insert plate 4 is inserted into the box 51, the slider 53 drives the protrusion 54 to slide along the inner wall of the box 51. The protrusion 54 drives the extension plate 56 to move. The extension plate 56 drives the front and rear centering parts 6 to move through the connecting rod 57. The telescopic rod 58 guides the front and rear centering parts 6.

[0048] In this embodiment, the box 51 moves first to adjust the angle of the resistance strain gauge and change its placement state. Then, the first electric push rod 31 with the insert plate 4 at the end extends out. After the insert plate 4 is inserted into the box 51, the slider 53 drives the protrusion 54 to slide along the inner wall of the box 51. The protrusion 54 drives the extension plate 56 to move. The extension plate 56 drives the front and rear centering member 6 to move by the connecting rod 57. Then, the front and rear centering member 6 is used to center the resistance strain gauge.

[0049] Example 3

[0050] When centering the resistance strain gauge, the front and rear centering member 6 is used to control the clamping force of the resistance strain gauge and avoid excessive clamping force that could cause deformation of the resistance strain gauge.

[0051] Based on Embodiment 1 or 2, this embodiment proposes a resistance strain gauge fixture with positioning function, such as... Figure 7 and 8 As shown, the front and rear centering component 6 includes a support plate 61, a pressure plate 62, and a contact switch 67. A square groove is provided on the side of the support plate 61, and the pressure plate 62 slides in the square groove. The side of the support plate 61 facing the pressure plate 62 is fixedly connected to the contact switch 67, and the side of the support plate 61 is fixedly connected to the telescopic rod 58.

[0052] like Figure 4-8 As shown, a guide rod 64 is fixedly installed on the side of the pressure plate 62 facing the support plate 61. The outer wall of the guide rod 64 is slidably connected to the support plate 61, and a limit plate 65 is fixedly installed at the end of the guide rod 64. The pressure plate 62 is elastically connected to the support plate 61 through a spring sheet 63. The spring sheet 63 is used to reset the pressure plate 62. When the front and rear centering member 6 moves to clamp the resistance strain gauge, the pressure plate 62 on it, because it protrudes from the support plate 61, first contacts the resistance strain gauge. When the two pressure plates 62 clamp the resistance strain gauge at the same time, the pressure plate 62 is pressed into the support plate 61 by the resistance strain gauge. The guide rod 64 is used to guide the pressure plate 62, and the limit plate 65 prevents the pressure plate 62 from detaching from the support plate 61.

[0053] A protective block 66 is fixedly installed on the side of the support plate 61, covering the contact switch 67. The end face of the protective block 66 is flush with the end face of the contact switch 67. The contact switch 67 is used to protect the protective block 66 and prevent it from being excessively squeezed. The contact switch 67 is electrically connected to the first electric push rod 31 and the second electric push rod 32 through the controller. After the pressure plate 62 contacts the contact switch 67, the first electric push rod 31 stops moving to avoid excessive squeezing, thereby adapting to the size of the resistance strain gauge and preventing damage from squeezing.

[0054] The pressure sensor was not installed on the pressure plate 62 because the pressure plate 62 is too large compared to the pressure sensor. When the pressure plate 62 first contacts the resistance strain gauge, the force on it is uneven, which will cause the pressure sensor to malfunction.

[0055] In this embodiment, when the two pressure plates 62 clamp the resistance strain gauge at the same time, the pressure plate 62 will be pressed into the support plate 61 by the resistance strain gauge. When the pressure plate 62 contacts the contact switch 67, the first electric push rod 31 stops moving to avoid the pressure plate 62 excessively squeezing the resistance strain gauge and causing it to deform.

[0056] Example 4

[0057] In order to center the resistance strain gauge in the left and right directions, it is fixed at the center of the tooling fixture, and fixed in multiple directions in the front, back, left and right, while controlling the clamping force.

[0058] Based on Embodiment 1 or 2 above, this embodiment proposes a resistance strain gauge fixture with positioning function, such as... Figure 3 As shown, the left and right centering component 3 also includes a second electric push rod 32 and a stop plate 33. The second electric push rod 32 is fixedly installed at the center of the first electric push rod 31, and the end of the second electric push rod 32 is fixedly installed with the stop plate 33.

[0059] A pressure sensor is fixedly installed on the side of the abutment plate 33. Multiple first electric push rods 31 are provided and evenly distributed on both sides of the magnet 2. The end of the first electric push rod 31 located on the left side of the magnet 2 is fixedly connected to the insert plate 4, and the end of the first electric push rod 31 located on the right side of the magnet 2 is fixedly connected to the box body 51.

[0060] In this embodiment, after the pressure plate 62 centers the resistance strain gauge in the front-to-back direction, the two first electric push rods 31 extend simultaneously. The first electric push rods 31 extend and contact the resistance strain gauge through the abutment plate 33. The two first electric push rods 31 are used to achieve centering in the left-to-right direction. The pressure sensor on the side of the abutment plate 33 prevents the resistance strain gauge from being damaged by excessive force.

[0061] The above specific embodiments are merely several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A resistance strain gauge fixture with positioning function, characterized in that, include: A bracket (1) is rotatably connected to the top center of the bracket (1), and two symmetrically arranged left and right centering parts (3) are provided on the side of the bracket (1). Adjustment component (5) includes a box body (51), a roller (52), a slider (53), an extension plate (56), and a connecting rod (57). The end of the roller (52) is rotatably connected to the box body (51), the side of the slider (53) is slidably connected to the box body (51), the side of the slider (53) is fixedly mounted with the extension plate (56), the end of the extension plate (56) is hinged with the connecting rod (57), the end of the connecting rod (57) is provided with a front and rear centering component (6), there are two boxes (51), and the front and rear centering component (6) is provided on the opposite side of the two boxes (51). One of the left and right centering parts (3) is fixedly connected to the side of the box body (51), and the other left and right centering part (3) is fixedly installed with a plate (4). The slider (53) is located on the extension line of the plate (4). The magnet (2) is located between the two boxes (51). A resistance strain gauge is placed on the top of the magnet (2).

2. The resistance strain gauge fixture with positioning function according to claim 1, characterized in that: A protrusion (54) is fixedly installed on the side of the slider (53), and a groove for sliding the protrusion (54) is opened inside the box (51). A return spring (55) is elastically connected between the protrusion (54) and the box (51) and in the groove inside the box (51).

3. The resistance strain gauge fixture with positioning function according to claim 2, characterized in that: Two sliders (53) are slidably connected on one of the boxes (51). Two parallel telescopic rods (58) are fixedly installed inside the box (51). The ends of the telescopic rods (58) are provided with front and rear centering parts (6). There is a gap between the two sliders (53) to allow the telescopic rods (58) to move.

4. The resistance strain gauge fixture with positioning function according to claim 3, characterized in that: The outer wall of the roller (52) is in contact with the resistance strain gauge, the slider (53) is either a polygonal column or a cylindrical column, and the cross-sectional shape of the insert plate (4) is the same as that of the slider (53).

5. The resistance strain gauge fixture with positioning function according to claim 3, characterized in that: The front and rear centering component (6) includes a support plate (61), a pressure plate (62) and a contact switch (67). The side of the support plate (61) is provided with a square groove, and the pressure plate (62) slides in the square groove. The side of the support plate (61) facing the pressure plate (62) is fixedly connected to the contact switch (67), and the side of the support plate (61) is fixedly connected to the telescopic rod (58).

6. The resistance strain gauge fixture with positioning function according to claim 5, characterized in that: A guide rod (64) is fixedly installed on the side of the pressure plate (62) facing the support plate (61). The outer wall of the guide rod (64) is slidably connected to the support plate (61). A limit plate (65) is fixedly installed at the end of the guide rod (64). The pressure plate (62) is elastically connected to the support plate (61) through a spring sheet (63).

7. The resistance strain gauge fixture with positioning function according to claim 5, characterized in that: A protective block (66) is fixedly installed on the side of the tray (61). The protective block (66) covers the contact switch (67). The end face of the protective block (66) is flush with the end face of the contact switch (67).

8. The resistance strain gauge fixture with positioning function according to claim 1, characterized in that: The left and right centering component (3) includes a first electric push rod (31), a second electric push rod (32) and a stop plate (33). The bracket (1) has a cavity inside. The first electric push rod (31) is set in the cavity and its end is fixedly connected to the bracket (1). The second electric push rod (32) is fixedly installed on the side of the bracket (1) and its end is fixedly installed to the stop plate (33).

9. The resistance strain gauge fixture with positioning function according to claim 8, characterized in that: A pressure sensor is fixedly installed on the side of the abutment plate (33). The first electric push rod (31) is provided in multiple and evenly distributed on both sides of the magnet (2). The end of the first electric push rod (31) on the left side of the magnet (2) is fixedly connected to the insert plate (4). The end of the first electric push rod (31) on the right side of the magnet (2) is fixedly connected to the box body (51). The contact switch (67) is electrically connected to the first electric push rod (31) and the second electric push rod (32).

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