Parallelism measuring tool

Abstract

The utility model relates to conveying equipment technical field, especially parallelism measurement frock, including base, telescopic link, angle adjusting mechanism and dial indicator, the opposite parallel surface on base is respectively arranged as first work surface and second work surface, has set up the clamping part on first work surface, clamping part is used for clamping a workpiece to be measured, telescopic link is perpendicular with first work surface, angle adjusting mechanism includes fixed link, first connecting rod and second connecting rod, fixed link is fixed on telescopic link one end of facing away from base, fixed link is coaxial with telescopic link, first connecting rod is hinged with fixed link, second connecting rod is hinged with first connecting rod, and dial indicator is installed fixedly on second connecting rod, the utility model discloses measurement frock aims at solving the technical problem that dial indicator lacks angle adjusting function in the existing measurement frock, leads to difficultly according to the flexible adjustment dial indicator measurement direction of on -the -spot space structure in actual use.

Description

Technical Field

[0001] This utility model relates to the field of conveying equipment technology, and specifically to a parallelism measuring fixture. Background Technology

[0002] In the field of automation equipment, rollers, as common transmission, guiding, or conveying components, directly determine the stability of equipment operation, product processing quality, and overall service life through their parallelism. Therefore, during equipment assembly and commissioning, rapid and accurate measurement of the parallelism between rollers has become a crucial step in ensuring equipment performance.

[0003] Currently, an existing patent (publication number CN213067411U) discloses a parallelism measuring fixture. This fixture uses a positioning plate that is pressed against the surface of a reference shaft and rotated around the shaft, causing a dial indicator probe mounted at the end of a connecting rod to slide along the surface of either shaft one or shaft two. The parallelism of the two shafts is evaluated based on the change in the dial indicator reading. For roller arrangements with different spacing, this fixture achieves flexible adaptation of the measurement range through the linear sliding of the connecting rod, thus accommodating rollers with varying spacing.

[0004] However, the dial indicator and connecting rod of the above-mentioned parallelism measuring fixture are fixed by a fixed base, which lacks an angle adjustment function, making it difficult to flexibly adjust the measuring direction of the dial indicator according to the actual space in actual use. Utility Model Content

[0005] In view of this, the present invention provides a parallelism measuring fixture, which aims to solve the technical problem that the dial indicator in the existing measuring fixture lacks an angle adjustment function, making it difficult to flexibly adjust the measuring direction of the dial indicator according to the on-site spatial structure in actual use.

[0006] To solve the above-mentioned technical problems, this utility model provides a parallelism measuring fixture, including a base, a telescopic rod, an angle adjustment mechanism, and a dial indicator. The relatively parallel surfaces on the base are respectively designated as a first working surface and a second working surface. A clamping portion is provided on the first working surface for clamping a workpiece to be measured. The telescopic rod is detachably connected to the second working surface and is perpendicular to the first working surface. The angle adjustment mechanism includes a fixed rod, a first connecting rod, and a second connecting rod. The fixed rod is fixed to one end of the telescopic rod facing away from the base and is coaxial with the telescopic rod. The first connecting rod is hinged to the fixed rod and locked onto the fixed rod. The hinge axis between the first connecting rod and the fixed rod is designated as a first hinge axis, which is perpendicular to the axial direction of the fixed rod. The second connecting rod is hinged to the first connecting rod and locked onto the first connecting rod. The hinge axis between the second connecting rods is designated as a second hinge axis, which is parallel to the first hinge axis. The dial indicator is mounted and fixed on the second connecting rod.

[0007] Furthermore, the end of the first hinge shaft is provided with a first threaded locking member, and a first nut is threadedly engaged on the first threaded locking member for locking the first connecting rod.

[0008] Furthermore, the end of the second hinge shaft is provided with a second threaded locking member, and a second nut is threaded onto the second threaded locking member for locking the second connecting rod.

[0009] Furthermore, the cross-section of the clamping part is an isosceles trapezoidal structure that slopes inward from bottom to top.

[0010] Furthermore, the telescopic rod includes an outer tube and an inner tube. The outer tube is vertically fixed to the center of the upper surface of the base. The inner tube is slidably fitted to the outer tube. The fixing rod is connected to the upper end of the inner tube, and the fixing rod, the inner tube, and the outer tube are coaxial with each other. Furthermore, a locking component is provided between the outer sleeve and the inner sleeve to lock the axial position of the inner sleeve relative to the outer sleeve.

[0011] Furthermore, the locking component includes a third threaded locking member and a third nut. A strip-shaped groove is provided through the circumferential surface of the outer tube. The third threaded locking member is fixedly disposed on the outer wall surface of the inner tube. The third threaded locking member passes through the strip-shaped groove and slides with it. The third nut is threadedly engaged with the third threaded locking member.

[0012] Furthermore, a scale is provided on the outer tube at a location adjacent to the strip groove. The scale extends vertically and is used to observe the height of the inner tube relative to the outer tube.

[0013] Furthermore, the surface of the base is provided with a level bubble for detecting the horizontal position of the base on the roller.

[0014] Furthermore, the inner wall of the clamping part is provided with an anti-slip pad.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: In use, the measuring fixture of this invention first clamps the base onto the reference roller. Then, the measuring range of the dial indicator is coarsely adjusted by adjusting the length of the telescopic rod. Next, by loosening the locking of the first and second connecting rods, the first connecting rod is rotated, causing it to drive the second connecting rod and the dial indicator to swing around the first hinge axis simultaneously. When the second connecting rod is rotated, it drives the dial indicator to swing around the second hinge axis. Thus, through the first and second hinge axes, which are perpendicular to each other, the angle of the dial indicator in two perpendicular directions can be adjusted respectively, allowing the dial indicator's contact to touch multiple different parts of the surface of the other roller to be measured. This allows for flexible adjustment of the dial indicator's measuring direction according to the site's spatial structure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the measuring fixture of this utility model; Figure 2 This is a schematic diagram of the angle adjustment mechanism involved in the embodiment; Figure 3 This is a schematic diagram of the structure after the first hinge shaft and the second hinge shaft are separated in the embodiment; Figure 4 For the purposes of this embodiment Figure 1 Enlarged schematic diagram of the structure at point A in the middle.

[0017] Numbering in each attached figure: 100. Base; 101. Clamping part; 102. Level bubble; 200. Telescopic rod; 201. Inner tube; 202. Strip groove; 203. Third threaded locking element; 204. Third nut; 205. Outer tube; 300. Angle adjustment mechanism; 310. Fixed rod; 320. First connecting rod; 330. Second connecting rod; 340. Second hinge shaft; 341. Second threaded locking element; 342. Second nut; 350. First hinge shaft; 351. First threaded locking element; 352. First nut; 400. Dial indicator; 401. Contact. Detailed Implementation

[0018] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0019] In the description of this utility model, it should be understood that the terms "width", "upper", "lower", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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 this utility model.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" 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, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through other features. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] Please refer to Figures 1-4 This utility model provides a parallelism measuring fixture. It includes a base 100, a telescopic rod 200, an angle adjustment mechanism 300, and a dial indicator 400.

[0023] Specifically, the relatively parallel surfaces on the base 100 are respectively designated as the first working surface and the second working surface. A clamping part 101 is provided on the first working surface for clamping a workpiece to be measured, which is one of the rollers to be measured. The telescopic rod 200 is detachably connected to the second working surface and is perpendicular to the first working surface, ensuring the initial reference direction of the measurement.

[0024] The angle adjustment mechanism 300 includes a fixed rod 310, a first connecting rod 320, and a second connecting rod 330. Specifically, the fixed rod 310 is fixed to the end of the telescopic rod 200 facing away from the base 100. The fixed rod 310 is coaxial with the telescopic rod 200. The first connecting rod 320 is hinged to the fixed rod 310 and locked onto the fixed rod 310. The hinge axis between the first connecting rod 320 and the fixed rod 310 is set as the first hinge axis 350, which is perpendicular to the axial direction of the fixed rod 310. The second connecting rod 330 is hinged to the first connecting rod 320 and locked onto the first connecting rod 320. The hinge axis between the two connecting rods 330 is set as the second hinge axis 340, which is parallel to the first hinge axis 350. The extension directions of these two parallel hinge axes are perpendicular to each other, so that the swing directions of the first connecting rod 320 and the second connecting rod 330 are perpendicular to each other. Dial indicator 400 is mounted and fixed on the second connecting rod 330. In use, the clamping part 101 of the base 100 is first clamped onto the reference roller. Then, the measuring range of the dial indicator 400 is coarsely adjusted by adjusting the length of the telescopic rod 200. Next, by loosening the locking of the first connecting rod 320 and the second connecting rod 330, the first connecting rod 320 is rotated so that it can drive the second connecting rod 330 and the dial indicator 400 to swing around the first hinge axis 350 simultaneously. When the second connecting rod 330 is rotated, it can drive the dial indicator 400 to swing around the second hinge axis 340. Thus, by using the first hinge axis 350 and the second hinge axis 340, which are perpendicular to each other in their extension directions, the angle of the dial indicator 400 in two perpendicular directions can be adjusted respectively, so that the contact 401 of the dial indicator 400 can touch multiple different parts of the surface of the other roller to be measured. This allows the measuring direction of the dial indicator 400 to be flexibly adjusted according to the on-site spatial structure.

[0025] Reference Figure 3 The first hinge shaft 350 has a first threaded locking member 351 at its end. A first nut 352 is threaded onto the first threaded locking member 351 to lock the first connecting rod 320. When it is necessary to adjust the angle of the first connecting rod 320, the first nut 352 is loosened, and the first connecting rod 320 can rotate freely around the first hinge shaft 350. After adjusting to the target angle, the first nut 352 is tightened, and the first threaded locking member 351 generates a clamping force on the first connecting rod 320 and the fixed rod 310, thereby firmly locking the first connecting rod 320 in the current position.

[0026] Reference Figure 3 The end of the second hinge shaft 340 is provided with a second threaded locking member 341, on which a second nut 342 is threadedly engaged to lock the second connecting rod 330. When it is necessary to adjust the angle of the second connecting rod 330, the second nut 342 is loosened, and the second connecting rod 330 can rotate freely around the second hinge shaft 340. After adjusting to the target angle, the second nut 342 is tightened, and the second threaded locking member 341 generates a clamping force on the second connecting rod 330 and the first connecting rod 320, thereby firmly locking the second connecting rod 330 at the current angle position.

[0027] It is worth mentioning that damping washers are fitted on the circumferential surfaces of the first hinge shaft 350 and the second hinge shaft 340. The damping washers provide a certain frictional resistance when hinged with the pin holes of the first connecting rod 320 and the second connecting rod 330, preventing them from wobbling due to their own weight or slight contact, thus improving stability.

[0028] Reference Figure 1The clamping part 101 has an isosceles trapezoidal cross-section that slopes inward from bottom to top. The operator places the clamping part 101 against the circumferential surface of the roller. This trapezoidal structure, which is narrower at the top and wider at the bottom, can well accommodate rollers of different diameters. When the base 100 is clamped onto the roller, the inclined surface of the trapezoid can guide the base 100 to automatically center itself and achieve stable support using the V-shaped principle.

[0029] Reference Figure 1 and Figure 4 The telescopic rod 200 includes an outer tube 205 and an inner tube 201. The outer tube 205 is vertically installed at the center of the upper surface of the base 100. The connection between the outer tube 205 and the base 100 is detachable and can employ commonly used connection structures, such as threaded installation. The inner tube 201 is vertically slidably fitted to the outer tube 205. The fixing rod 310 is connected to the upper end of the inner tube 201, and the fixing rod 310, the inner tube 201, and the outer tube 205 are coaxial. By pulling the inner tube 201, the distance between the dial indicator 400 and the base 100 can be changed, allowing the dial indicator 400 to be adapted to two measuring rollers with different spacings.

[0030] Furthermore, a locking component is provided between the outer sleeve 205 and the inner sleeve to lock the axial position of the inner sleeve 201 relative to the outer sleeve 205.

[0031] The locking components include a third threaded locking element 203 and a third nut 204. Specifically, a strip-shaped groove 202 is formed through the circumferential surface of the outer tube 205. The third threaded locking element 203 is fixedly mounted on the outer wall of the inner tube 201, extending through the strip-shaped groove 202 and slidingly engaging with it. The third nut 204 is threadedly engaged with the third threaded locking element 203. When adjusting the distance between the dial indicator 400 and the base 100, the third nut 204 is loosened. Then, the inner tube 201 is pulled out as needed, allowing it to slide along the strip-shaped groove 202 with the third threaded locking element 203. After adjusting to the desired position, the third nut 204 is tightened, pressing against the outer wall of the outer tube 205 and locking the inner tube 201 in the designated position through friction.

[0032] In other embodiments, the telescopic rod 200 may also adopt an automatic telescopic device commonly used in the prior art, such as an electric telescopic push rod, etc., which is not limited here.

[0033] Furthermore, a scale is provided on the outer tube 205 and at the part adjacent to the strip groove. The scale extends vertically and is used to observe the height of the inner tube 201 relative to the outer tube 205. When the operator pulls out the inner tube 201, the current precise height value can be directly determined by observing the position of the baseline of the end of the inner tube 201 facing the base 100 relative to the scale.

[0034] Reference Figure 1 The surface of the base 100 is provided with a level bubble 102 for detecting the horizontal position of the base 100 on the roller. After the tooling is clamped on the reference roller by the clamping part 101, it can be determined whether the bubble of the level bubble 102 is centered. This reduces the measurement error caused by installation tilt and improves the basic accuracy of the measurement.

[0035] The inner wall of the clamping part 101 is equipped with an anti-slip pad made of wear-resistant engineering plastic with a sandblasted hard plastic surface. This anti-slip pad directly contacts the roller shaft through its high-friction surface, utilizing static friction between the materials to resist slippage of the tooling. Due to its hard material, it will not deform under clamping conditions, ensuring measurement accuracy.

[0036] After the operator adjusts the angle of the dial indicator 400 in conjunction with the rotation of the first link 320 and the second link 330, the clamping part 101 is placed against the circumferential surface of one end of one of the workpieces to be measured. Then, the contact 401 of the dial indicator 400 is placed against the designated position of the other workpiece to be measured. First, the contact 401 touching the workpiece to be measured and the data of the dial indicator 400 are recorded. Then, the base 100 is moved to the circumferential surface of the other end of the workpiece to be measured. While ensuring that the angle of the dial indicator 400 remains unchanged, the contact 401 of the dial indicator 400 is brought into contact with the designated position of the other workpiece to be measured. The data of the dial indicator 400 is recorded again. By comparing the measurement results multiple times, it is determined whether the two workpieces to be measured are parallel.

[0037] It should be noted that the dial indicator 400 is a commonly used technical means in the field of existing roller parallel measurement technology, and the specific usage method of the dial indicator 400 will not be elaborated here.

[0038] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A parallelism measuring fixture, characterized in that, The device includes a base, a telescopic rod, an angle adjustment mechanism, and a dial indicator. The base has two parallel surfaces, a first working surface and a second working surface. A clamping portion is provided on the first working surface for clamping a workpiece to be measured. The telescopic rod is detachably connected to the second working surface and is perpendicular to the first working surface. The angle adjustment mechanism includes a fixed rod, a first connecting rod, and a second connecting rod. The fixed rod is fixed to the telescopic rod at one end facing away from the base and is coaxial with the telescopic rod. The first connecting rod is hinged to the fixed rod and locked to the fixed rod. The hinge axis between the first connecting rod and the fixed rod is designated as a first hinge axis, perpendicular to the axial direction of the fixed rod. The second connecting rod is hinged to the first connecting rod and locked to the first connecting rod. The hinge axis between the second connecting rods is designated as a second hinge axis, parallel to the first hinge axis. The dial indicator is mounted and fixed to the second connecting rod.

2. The parallelism measuring fixture as described in claim 1, characterized in that: The first hinge shaft has a first threaded locking member at its end, and a first nut is threaded onto the first threaded locking member to lock the first connecting rod.

3. The parallelism measuring fixture as described in claim 1, characterized in that: The end of the second hinge shaft is provided with a second threaded locking member, and a second nut is threadedly engaged on the second threaded locking member to lock the second connecting rod.

4. The parallelism measuring fixture as described in claim 1, characterized in that: The cross-section of the clamping part is an isosceles trapezoidal structure that slopes inward from bottom to top.

5. The parallelism measuring fixture as described in claim 1, characterized in that: The telescopic rod includes an outer tube and an inner tube. The outer tube is vertically fixed to the center of the upper surface of the base. The inner tube is slidably fitted to the outer tube. The fixing rod is connected to the upper end of the inner tube, and the fixing rod, the inner tube and the outer tube are coaxial with each other.

6. The parallelism measuring fixture as described in claim 5, characterized in that: A locking component is also provided between the outer sleeve and the inner sleeve to lock the axial position of the inner sleeve relative to the outer sleeve.

7. The parallelism measuring fixture as described in claim 6, characterized in that: The locking component includes a third threaded locking member and a third nut. A strip-shaped groove is provided through the circumferential surface of the outer tube. The third threaded locking member is fixedly installed on the outer wall surface of the inner tube. The third threaded locking member passes through the strip-shaped groove and slides with it. The third nut is threadedly engaged with the third threaded locking member.

8. The parallelism measuring fixture as described in claim 7, characterized in that: A scale is provided on the outer tube and adjacent to the groove. The scale extends vertically and is used to observe the height of the inner tube relative to the outer tube.

9. The parallelism measuring fixture as described in claim 1, characterized in that: The surface of the base is provided with a level bubble for detecting the horizontal position of the base on the roller.

10. The parallelism measuring fixture as described in claim 1, characterized in that: The inner wall of the clamping part is provided with an anti-slip pad.

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