Height gauge

Abstract

The utility model provides a height gauge, and belongs to the technical field of measuring tools. The problem that a height gauge zeroing structure is complex is solved. The height gauge comprises a base with a reference surface, a main scale which is vertical to the reference surface and is arranged upwards is fixed on the base, a vernier scale capable of sliding along the main scale is sleeved on the main scale, a convex mounting arm is arranged on the side surface of the vernier scale, and the height gauge further comprises a round-rod-shaped marking pin, the mounting arm is provided with a mounting hole which is inclined upwards relative to the reference surface, the scriber is arranged in the mounting hole in a penetrating manner and can slide along the mounting hole, the mounting arm is in threaded connection with a locking bolt which can lock the scriber on the mounting arm, and the downward end of the scriber extends out of the mounting hole and is provided with a conical tip; and the inclination angle of the mounting hole relative to the reference surface is half of the tip taper angle. The height gauge is convenient in zero setting and simple in structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of measuring tools and relates to a height gauge. Background Art

[0002] A height gauge is a measuring tool that is mainly used to measure the height of workpieces. Sometimes it can also be used for marking.

[0003] A height gauge, also known as a vernier height gauge, consists of a base, measuring jaws, a main scale with graduations, and a vernier with reading graduations. The main scale is mounted vertically on the base, and the vernier is mounted on the outside of the main scale and can slide along it. A locking bolt is threaded onto the vernier, which rests against the main scale to lock it to the main scale. The outer surface of the vernier has a mounting arm perpendicular to the vernier, and the mounting arm has a clamping frame. The measuring jaws are Z-shaped, with three arms perpendicular to each other. The upper arm is parallel to the mounting arm and is inserted into the clamping frame and secured. The structure of the measuring jaws is similar to the marking measuring jaws of a height gauge described in Chinese patent literature [Announcement No. CN208100354U].

[0004] The height gauge needs to be zeroed before use. The above-mentioned measuring claws are difficult to zero because their height position cannot be adjusted. For this reason, a vernier height gauge quick zeroing device has been designed based on the ordinary height gauge [Chinese patent document with announcement number CN202770338U], which includes a scale frame, a locking frame and a Z-shaped marking claw. The Z-shaped marking claw is divided into an L-shaped marking claw and an L-shaped connecting frame. The L-shaped connecting frame is arranged on the plane of the scale frame cantilever or under the plane of the cantilever. The horizontal arm of the L-shaped connecting frame is fixedly connected to the scale frame cantilever through the locking frame. The vertical arm of the L-shaped connecting frame is connected to the vertical arm of the L-shaped marking claw through a micro-motion device. The micro-motion device includes a first brake screw, a second brake screw, a third brake screw, a fine-tuning nut and a fine-tuning connecting assembly. When a vernier height gauge experiences an initial error, first align the main scale with the "0" position on the vernier scale. Then, place the gauge flat on a standard platform, loosen the third stop screw, and turn the fine-adjustment nut to fine-tune the L-shaped marking jaws up and down until the working plane of the L-shaped marking jaws is flush with the workpiece plane of the base. Finally, tighten the third stop screw. This height gauge can achieve zero adjustment, but its structure is complex. Utility Model Content

[0005] The purpose of the utility model is to solve the above problems in the prior art and to propose a height gauge, which solves the technical problem of how to make the height gauge easy to adjust to zero and simple in structure.

[0006] The purpose of this utility model can be achieved through the following technical solutions:

[0007] A height gauge comprises a base having a reference surface, a main scale perpendicular to the reference surface and facing upward fixed on the base, a vernier scale which can slide along the main scale mounted on the main scale, a protruding mounting arm on the side of the vernier scale, and is characterized in that it also comprises a stylus in the form of a round rod, a mounting hole inclined upward relative to the reference surface is provided on the mounting arm, the stylus is inserted into the mounting hole and can slide along the mounting hole, a locking bolt which can lock the stylus on the mounting arm is threadedly connected on the mounting arm, the downward end of the stylus extends out of the mounting hole and has a conical tip, and the inclination angle of the mounting hole relative to the reference surface is equal to half of the cone angle of the tip.

[0008] The datum plane is located on the bottom surface of the base. To adjust the zero, place the base on a measuring table with the working surface of the table at a standard horizontal plane, and the datum plane in contact with the working surface of the table. Lower the vernier scale so that the zero mark on the vernier scale is above the zero mark on the main caliper. Then, loosen the locking bolt to allow the stylus to slide. After loosening the locking bolt, the stylus slides downward and the outer conical surface of the tip rests on the working surface of the table. Next, slide the vernier scale so that the zero mark on the vernier scale is aligned with the zero mark on the main scale. Due to the inclined mounting hole, as the vernier scale slides downward, the outer conical surface of the tip rests on the working surface of the table, adaptively pushing the stylus upward. Then, tighten the locking bolt to lock the stylus into the mounting arm, completing the zero adjustment. Because the mounting hole is tilted relative to the datum plane at half the angle of the tip's cone, when the outer conical surface of the tip rests on the working surface of the table, the tip and the bottom of the outer conical surface are flush with the datum plane of the base. This height gauge is provided with a round rod marking needle and a locking bolt to achieve zero adjustment. Compared with the existing height gauge which is provided with an L-shaped marking claw, an L-shaped connecting frame, a third brake screw, a fine-adjustment nut and a fine-adjustment connecting assembly to achieve zero adjustment, this height gauge is convenient to zero and has a simple structure.

[0009] In the above-mentioned height gauge, the mounting hole is a pentagonal prism hole, and the hole wall surface of the mounting hole includes a first surface, a second surface, a third surface, a fourth surface and a fifth surface arranged in sequence along the circumferential direction, the second surface is located above the fourth surface and the fifth surface and the first surface and the third surface are both perpendicular to the second surface, the fourth surface is inclined downward relative to the third surface, the fifth surface is inclined downward relative to the first surface, the fourth surface and the fifth surface are symmetrically arranged, and the locking bolt is located on the upper side of the marking needle and passes vertically through the second surface.

[0010] When the locking bolt is tightened downward, the outer surface of the stylus rests against the fourth and fifth surfaces, locking the rod-shaped stylus to the mounting arm. The mounting hole is a pentagonal prism, allowing styluses of varying outer diameters to be accommodated, facilitating the use of the height gauge. Furthermore, the locking bolt forms a triangular fixing structure for the stylus, ensuring stable fixation.

[0011] In the height gauge described above, the mounting hole is a cylindrical hole, and the outer circumference of the stylus has a clearance fit with the wall of the mounting hole. This clearance fit allows both sliding of the stylus and radial positioning of the stylus, and the cylindrical mounting hole is easier to process.

[0012] In the height gauge described above, the base has two parallel protrusions protruding from its bottom surface. The reference surface is located on the bottom surfaces of the two protrusions, and the main scale is located between the two protrusions. This placement of the reference surface on the bottom surfaces of the protrusions reduces the difficulty of machining the reference surface's flatness and facilitates machining of the base.

[0013] In the above-mentioned height gauge, the mounting arm is separately connected to the vernier scale, and the vernier scale has a connecting ear. One end of the mounting arm has two opposite lugs, and the connecting ear is inserted between the two lugs and locked by a fixing bolt. The fixing bolt is passed through the connecting ear and the two lugs and forms a threaded connection with the connecting ear. When the fixing bolt is loosened, the mounting arm can swing up and down around the fixing bolt. The marking needle is installed on the other end of the mounting arm and is perpendicular to the fixing bolt.

[0014] Different stylus sizes may result in different collet taper angles. Therefore, when adjusting the zero, first loosen the fixing bolts, rotate the mounting arm so that the mounting hole's inclination relative to the reference surface is equal to half the collet taper angle, then tighten the fixing bolts to lock the mounting arm to the vernier scale before adjusting the zero. This allows the height gauge to accommodate a wider range of stylus sizes, making it easier to use.

[0015] In the height gauge, a spring sheet is provided between the head of the fixing bolt and the opposite lug. When the fixing bolt is loosened, the mounting arm and the vernier scale can rotate relative to each other. When the fixing bolt is tightened, the spring sheet prevents the mounting arm and the vernier scale from loosening, thereby securing the mounting arm and the vernier scale.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] This height gauge features a simple zero adjustment mechanism using a single round stylus and locking bolt. Compared to existing height gauges, this one offers convenient zero adjustment and a simpler structure. The mounting hole is a pentagonal prism, providing stable stylus fixation and adapting to various stylus sizes. The mounting arm is separately connected to the vernier scale via a fixing bolt, and the arm's tilt angle is adjustable to accommodate a wider range of stylus sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the first embodiment of the height gauge.

[0019] Figure 2 2 is a front view structural diagram of the first embodiment of the height gauge.

[0020] Figure 3 It is a left-side structural schematic diagram of the first embodiment of the height gauge.

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the second embodiment of the height gauge.

[0022] Figure 5 This is a cross-sectional view of the locking bolt in the second embodiment of the height gauge.

[0023] Figure 6 This is a schematic diagram of the top view of the connection between the mounting arm and the vernier scale in the third embodiment of the height gauge.

[0024] In the figure, 1, base; 1a, reference surface; 1b, convex strip; 2, main scale; 3, vernier scale; 3a, mounting arm; 3a1, mounting hole; 3a11, first surface; 3a12, second surface; 3a13, third surface; 3a14, fourth surface; 3a15, fifth surface; 3a2, lug; 3b, connecting lug; 4, marking needle; 4a, pointed tip; 5, locking bolt; 6, fixing bolt; 7, spring leaf. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0026] Example 1

[0027] like Figure 1 and Figure 2 As shown, a height gauge includes a base 1 and a round rod-shaped stylus 4, and the bottom surface of the base 1 is a reference surface 1a. A main scale 2 is fixed on the base 1, which is perpendicular to the reference surface 1a and facing upward. A vernier scale 3 is mounted on the main scale 2 and can slide along the main scale 2. A locking screw is provided between the vernier scale 3 and the main scale 2. A protruding mounting arm 3a is provided on the side of the vernier scale 3. The mounting arm 3a is provided with a mounting hole 3a1 that is tilted upward relative to the reference surface 1a. The mounting hole 3a1 is a cylindrical hole. The stylus 4 is inserted into the mounting hole 3a1 and can slide along the mounting hole 3a1. The outer peripheral surface of the stylus 4 is clearance-fitted with the wall surface of the mounting hole 3a1. The downward end of the stylus 4 extends out of the mounting hole 3a1 and has a conical tip 4a. The mounting arm 3a is threadedly connected with a locking bolt 5 that can lock the stylus 4 on the mounting arm 3a. The head of the locking bolt 5 is located outside the mounting arm 3a, and the bottom end of the locking bolt 5 abuts against the outer peripheral surface of the stylus 4. The locking bolt 5 is a Yuanbao bolt. Figure 3 As shown, the inclination angle of the mounting hole 3a1 relative to the reference surface 1a is equal to half of the cone angle of the tip 4a.

[0028] To adjust the height, place the base 1 on a measuring table with the working surface of the measuring table at a standard horizontal plane, and the reference surface 1a against the working surface of the measuring table. Loosen the locking screw to lower the vernier scale 3, so that the zero scale line of the vernier scale 3 is above the zero scale line of the main caliper. Then, loosen the locking bolt 5 to allow the stylus 4 to slide. After loosening the locking bolt 5, the stylus 4 slides downward and the outer conical surface of the tip 4a rests against the working surface of the measuring table. Then, slide the vernier scale 3 so that the zero scale line on the vernier scale 3 is aligned with the zero scale line on the main scale 2. Due to the inclined mounting hole 3a1, as the vernier scale 3 slides downward, the outer conical surface of the tip 4a rests against the working surface of the measuring table, adaptively pushing the stylus 4 upward. Then, tighten the locking bolt 5 to lock the stylus 4 on the mounting arm 3a, completing the zero adjustment. This height gauge is easy to adjust to zero and has a simple structure.

[0029] Example 2

[0030] like Figure 4 and Figure 5 As shown, the structure and orientation of the mounting hole 3a1 and the structure of the base 1 are different from those of Example 1, while the other structures are basically the same as those of Example 1. The mounting hole 3a1 is a pentagonal prism hole, and the hole wall of the mounting hole 3a1 includes a first surface 3a11, a second surface 3a12, a third surface 3a13, a fourth surface 3a14, and a fifth surface 3a15 arranged in sequence along the circumferential direction. The second surface 3a12 is located above the fourth surface 3a14 and the fifth surface 3a15, and the first surface 3a11 and the third surface 3a13 are both perpendicular to the second surface 3a12. The fourth surface 3a14 is inclined downward relative to the third surface 3a13, and the fifth surface 3a15 is inclined downward relative to the first surface 3a11. The fourth surface 3a14 and the fifth surface 3a15 are symmetrically arranged. The locking bolt 5 is located above the stylus 4 and vertically passes through the second surface 3a12. When the locking bolt 5 is tightened downward, the outer circumference of the stylus 4 rests against the fourth surface 3a14 and the fifth surface 3a15, thereby locking the rod-shaped stylus 4 to the mounting arm 3a. Two parallel protrusions 1b protrude from the bottom surface of the base 1. The reference surface 1a is disposed on the bottom surfaces of the two protrusions 1b, and the main scale 2 is located between the two protrusions 1b. The zeroing operation is essentially the same as in Example 1. Two locking bolts 5 can be provided, arranged axially along the stylus 4.

[0031] Example 3

[0032] like Figure 6As shown, the mounting arm 3a is separately connected to the vernier scale 3, and the other structures are basically the same as those in Example 1 or Example 2. The vernier scale 3 has a connecting ear 3b, and one end of the mounting arm 3a has two opposite lugs 3a2, and the connecting ear 3b is inserted between the two lugs 3a2. The connecting ear 3b and the two lugs 3a2 are locked by a fixing bolt 6, and the stylus 4 is installed on the other end of the mounting arm 3a and is perpendicular to the fixing bolt 6. The fixing bolt 6 is passed through the connecting ear 3b and the two lugs 3a2 and forms a threaded connection with the connecting ear 3b. When the fixing bolt 6 is loosened, the mounting arm 3a can swing up and down around the fixing bolt 6. A spring sheet 7 is provided between the head of the fixing bolt 6 and the lug 3a2, and the spring sheet 7 is used to prevent loosening.

[0033] When adjusting the zero, place the base 1 on the measuring table, with the reference surface 1a against the working surface of the measuring table; loosen the locking screw and adjust the vernier 3 downward, so that the zero scale line of the vernier 3 is above the zero scale line of the main caliper; loosen the fixing bolt 6 and the locking bolt 5, and the stylus 4 slides down, and the outer conical surface of the tip 4a of the stylus 4 abuts against the working surface of the measuring table, and then slide the vernier 3 downward, and the outer conical surface of the tip 4a abuts against the working surface of the measuring table, which can adaptively push the stylus 4 to slide upward while rotating the mounting arm 3a. After the sliding vernier 3 aligns the zero scale line on the vernier 3 with the zero scale line on the main scale 2, tighten the fixing bolt 6 and the locking bolt 5 to fix the mounting arm 3a on the vernier 3, and the stylus 4 is locked on the mounting arm 3a, completing the zero adjustment. The zero adjustment operation is convenient. If the adaptive rotation effect is not good, you can also manually rotate the mounting arm 3a first to make the inclination angle of the mounting hole 3a1 relative to the reference surface 1a equal to half the cone angle of the tip 4a, and then perform zero adjustment.

[0034] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A height gauge, comprising a base (1) having a reference surface (1a), a main scale (2) fixed on the base (1) and arranged perpendicular to the reference surface (1a) and facing upward, a vernier scale (3) mounted on the main scale (2) and capable of sliding along the main scale (2), and a protruding mounting arm (3a) on the side of the vernier scale (3), characterized in that: It also includes a round rod-shaped marking needle (4), the mounting arm (3a) is provided with a mounting hole (3a1) inclined upward relative to the reference plane (1a), the marking needle (4) is inserted into the mounting hole (3a1) and can slide along the mounting hole (3a1), the mounting arm (3a) is threadedly connected with a locking bolt (5) capable of locking the marking needle (4) on the mounting arm (3a), the downward end of the marking needle (4) extends out of the mounting hole (3a1) and has a conical tip (4a), and the inclination angle of the mounting hole (3a1) relative to the reference plane (1a) is equal to half the cone angle of the tip (4a).

2. The height gauge according to claim 1, wherein: The mounting hole (3a1) is a pentagonal prism hole. The hole wall of the mounting hole (3a1) includes a first surface (3a11), a second surface (3a12), a third surface (3a13), a fourth surface (3a14) and a fifth surface (3a15) arranged in sequence along the circumferential direction. The second surface (3a12) is located above the fourth surface (3a14) and the fifth surface (3a15), and the first surface (3a11) and the third surface (3a13) are both perpendicular to the second surface (3a12). The fourth surface (3a14) is inclined downward relative to the third surface (3a13), and the fifth surface (3a15) is inclined downward relative to the first surface (3a11). The fourth surface (3a14) and the fifth surface (3a15) are symmetrically arranged. The locking bolt (5) is located on the upper side of the marking needle (4) and vertically passes through the second surface (3a12).

3. The height gauge according to claim 1, wherein: The mounting hole (3a1) is a cylindrical hole, and the outer peripheral surface of the marking needle (4) is clearance-matched with the hole wall surface of the mounting hole (3a1).

4. The height gauge according to any one of claims 1 to 3, characterized in that: Two mutually parallel convex strips (1b) are protruding from the bottom surface of the base (1), the reference surface (1a) is arranged on the bottom surfaces of the two convex strips (1b), and the main scale (2) is located between the two convex strips (1b).

5. The height gauge according to any one of claims 1 to 3, characterized in that: The mounting arm (3a) is separately connected to the vernier scale (3), and the vernier scale (3) has a connecting ear (3b). One end of the mounting arm (3a) has two opposite lugs (3a2), and the connecting ear (3b) is inserted between the two lugs (3a2) and locked by a fixing bolt (6). The fixing bolt (6) is passed through the connecting ear (3b) and the two lugs (3a2) and forms a threaded connection with the connecting ear (3b). When the fixing bolt (6) is loosened, the mounting arm (3a) can swing up and down around the fixing bolt (6), and the marking needle (4) is mounted on the other end of the mounting arm (3a) and is perpendicular to the fixing bolt (6).

6. The height gauge according to claim 5, characterized in that: A spring sheet (7) is provided between the head of the fixing bolt (6) and the opposite lug (3a2).

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