JP3206149U - Lever type dial gauge - Google Patents

Abstract

To provide a lever type dial gauge capable of expanding the range of an object to be measured and reducing the occurrence of a measurement error even when a measuring element is lengthened. A length L2 from the tip of the measuring element 18 to the axis of the mass shaft 16a of the lever 15 is a length from the axis of the mass shaft 16a of the lever 15 to the axis of the sector shaft 17a of the sector gear 17. The length from the axis of the sector shaft 17a to the lever contact knock 17c in the sector gear 17 is larger than L3, and the length L2 from the tip of the probe 18 to the axis of the Masatsu shaft 16a of the lever 15; The length L3 from the axis of the mass 15 shaft 16a of the lever 15 to the axis of the sector shaft 17a of the sector gear 17, and the length L5L3 of the sector gear 17 from the axis of the sector shaft 17a to the gear portion 17b are expanded. Determined by the rate. [Selection] Figure 11

Description

  The present invention relates to a lever type dial gauge, and in particular, a lever type in which the enlargement ratio does not change even if the length of the measuring element is longer than that of the conventional one and is movable only in one direction (positive direction). Concerning dial gauge.

  The present applicant has previously proposed a lever-type dial gauge in which a measuring element rotates and measures in the forward direction and the reverse direction (see, for example, Patent Document 1).

Registered Utility Model No. 3061910

  By the way, the lever type dial gauge is widely used in various machining sites such as peripheral runout and end face touch measurement in lathe work, but when the length of the probe is short, the tip of the probe does not reach the part to be measured. There is a problem that the lever type gauge main body interferes with a measurement object such as a workpiece and cannot be measured.

  In particular, the length of the measuring element is conventionally 8.13 mm for the company's own, and about 9 mm to 11 mm even for other companies, so if the part to be measured such as a workpiece is deep, the tip of the measuring element In many cases, measurement cannot be performed without reaching, and the measurement error has become large when measuring with the angle of the probe to avoid interference between the measurement object and the gauge body.

  On the other hand, when the length of the measuring element is increased, the enlargement ratio is reduced, the length indicated by one scale of the dial gauge is increased, and a new problem that the length cannot be accurately measured occurs.

  Therefore, the present invention has been made to solve such problems. Even if the measuring element is lengthened, the enlargement ratio does not change, the range of the measuring object is widened, and the occurrence of measurement errors is reduced. An object is to provide a lever type dial gauge that can be used.

A lever type dial gauge according to the present invention is a scale plate indicated by a pointer attached to a rotating shaft that rotates by rotating a moving length of a probe tip according to a predetermined magnification, and a ground plate to which the scale plate is attached, A gauge body to which the main plate is fixed, a lever supported by the gauge body so as to be swingable in only one direction via a Masatsu shaft, a lever provided with a lever contact on the upper end, and a sector on the gauge body. A lever contact that is supported by a shaft so as to be swingable in only one direction, and that has a gear portion at an end opposite to the lever, and that contacts the lever contact between the gear portion and the sector shaft; A sector gear provided with a knock, and rotatably supported by the gauge body, and has a circumferential outer gear portion and an inner gear portion having the same rotation center and different diameters, and the inner gear portion is The outer gear portion meshes with a pinion gear provided at the end of the rotating shaft opposite to the pointer while meshing with the gear portion of the cutter gear and rotating according to the swing of the sector gear. A crown gear that rotates the pointer, and the length from the tip of the probe to the axis of the lever's mass shaft extends from the axis of the lever's mass to the axis of the sector shaft of the sector gear. And the length from the axis of the sector axis to the lever contact knock in the sector gear, the length from the tip of the measuring element to the axis of the mass of the lever, and the length of the mass of the lever Determined by the length from the axis to the axis of the sector axis of the sector gear, the length from the axis of the sector axis to the gear portion of the sector gear, and the predetermined enlargement ratio The first, characterized in that the.
Further, the lever type dial gauge according to the present invention is the lever type dial gauge, wherein the length from the tip of the measuring element to the axis of the lever's mass shaft is from the axis of the lever's mass shaft to the sector gear. The second feature is that it is larger than the length to the lever contact knock.
The lever type dial gauge according to the present invention is the lever type dial gauge, wherein the gauge body has a substantially rectangular parallelepiped shape and is provided with at least two screw holes for fixing the base plate on one side surface. On the other hand, a semicircular ground plate receiving portion is provided protruding from the side surface provided with the screw hole, and an additional screw hole for fixing the ground plate is provided in the ground plate receiving portion. And the ground plate is fixed to the gauge body through screws in at least two screw holes without the one side surface and additional screw holes in the ground plate receiving portion. And

According to the lever type dial gauge of the present invention, the length from the tip of the probe to the axis of the lever's mass shaft is greater than the length from the axis of the lever's mass shaft to the axis of the sector shaft of the sector gear. In addition, the length from the axis of the sector axis to the lever contact knock in the sector gear, the length from the tip of the probe to the axis of the lever's mass axis, and the axis of the lever's mass axis to the sector axis of the sector gear The length from the axis of the sector axis to the gear section in the sector gear and the enlargement ratio were determined, so the enlargement ratio did not change even if the measuring element was lengthened, and the measuring element was lengthened. As a result, it is less likely that the tip of the probe does not reach the part of the workpiece to be measured that is to be measured.
As a result, the range of the measurement object is expanded, and the measurement object is not angled in order to avoid the interference between the measurement object such as a workpiece and the gauge body, and the generation of measurement errors can be reduced.

It is a front view of the lever type dial gauge of the embodiment concerning the present invention. It is front sectional drawing of the gauge main body of the lever type dial gauge of embodiment which concerns on this invention. It is a side view of the lever type dial gauge of the embodiment concerning the present invention. It is side surface sectional drawing of the gauge main body of the lever type dial gauge of embodiment which concerns on this invention. (A), (b) is the front view of the base plate which comprises the lever type dial gauge of embodiment which concerns on this invention, respectively, and AA sectional view. (A), (b) is the front view and side view of a gauge main body which comprise the lever type dial gauge of embodiment which concerns on this invention, respectively. It is a rear view of the gauge main body which comprises the lever type dial gauge of embodiment which concerns on this invention. It is a front view which shows the state which mounted | wore the base plate in the gauge main body which comprises the lever type dial gauge of embodiment which concerns on this invention. (A), (b) is the side view and top view of the lever which respectively comprise the lever type dial gauge of embodiment which concerns on this invention. (A), (b) is the side view and top view of the crown gear which comprise the lever type dial gauge of embodiment which concerns on this invention, respectively. It is explanatory drawing which shows the dimension of each part required when calculating the magnification in the lever type dial gauge of embodiment which concerns on this invention. It is side surface sectional drawing which shows the state inside a gauge main body when a measuring element moves to the arrow direction in the lever type dial gauge of embodiment which concerns on this invention. (A), (b) When measuring with a conventional lever-type dial gauge with a short probe, the tip of the probe does not reach the second inner peripheral surface of the work, and the implementation according to the present invention with a long probe It is a figure which shows the state in which the front-end | tip of the measuring element reached | attained the 2nd internal peripheral surface of the workpiece | work when measuring with the lever-type dial gauge of a form.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a lever type dial gauge according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The embodiment described below is merely an example of the present invention including its dimensions and the like, and the present invention is not limited to the following embodiment, and can be appropriately changed within the scope of the technical idea of the present invention. is there.

  In the lever type dial gauge 1 of the embodiment, even if the length of the probe 11 is increased to, for example, 14.18 mm, which is 1.7 times or more than the conventional 8.13 mm, the enlargement ratio does not change, and one direction ( 1 to 4, the measuring element 11, the scale plate 12, the ground plate 13, the gauge body 14, the lever 15, and the Masatsu shaft 16, as shown in FIGS. It has various parts such as a sector gear 17, a crown gear 18, a stem 19, stoppers 20 and 20, and a return spring 22.

  The scale plate 12 is graduated at predetermined intervals as shown in FIG. 1, and the moving length of the tip of the measuring element 18 is enlarged according to a predetermined enlargement ratio by the structure shown below to rotate the pointer 12a. It is rotated through a shaft 12b, a pinion gear 12c (see FIG. 4 etc.), etc., and the measurement result is shown.

  The base plate 13 is to which the scale plate 12 and its transparent case are attached. As shown in FIGS. 5A and 5B, a gear and a spring for rotating the pointer 12a and the rotary shaft 12b of the scale plate 12, A component accommodating portion 13a for accommodating components such as a mainspring is provided, and three screw holes 13b to 13d for fixing to the gauge body 14 are provided in the component accommodating portion 13a.

  As shown in FIG. 4, the gauge main body 14 is a member to which various parts such as the base plate 13, the lever 15, the sector gear 17, the crown gear 18, the stem 19, the stoppers 20 and 20, and the return spring 22 are fixed. 6 (a), 6 (b) and FIG. 7, the component accommodating portion 14a for accommodating the lever 15, the sector gear 17, the crown gear 18 and the like, and the screw for the stem 19 are formed. The stem mounting portion 14b to which the portion is screwed, the Masatsu shaft mounting hole 14c in which the Masatsu shaft 16 of the lever 15 is rotatably provided, and the stopper mounting holes 14d and 14d to which the pair of stoppers 20 and 20 are mounted, respectively. Is provided.

  Further, as shown in FIG. 6A, two screw holes 14e1 and 14e2 are provided on the ground plate mounting side surface 14e on the side of the gauge main body 14 to which the ground plate 13 is to be mounted, while the ground plate mounting side surface 14e is provided. A base plate receiving portion 14f having a semicircular shape is provided on the same plane, and a screw hole 14f1 is provided on the base plate mounting side surface 14e for attaching the base plate 13 to the base plate receiving portion 14f. That is, three screw holes 14e1, 14e2, and 14f1 are also provided in the gauge main body 14 so as to correspond to the three screw holes 13b to 13d (see FIG. 5A, etc.) of the base plate 1.

  Accordingly, as shown in FIG. 8 and the like, the ground plane 13 is fixed to the gauge body 14 with three screws (screws) 21, so that the ground plate 13 is fixed to the gauge body 14 with two screws. In addition, since the mounting strength of the base plate 13 with respect to the gauge body 14 is improved, the base plate 13 is less loosened, and the occurrence of malfunction due to the loose base plate 13 can be prevented.

  The lever 15 is press-fitted into the Masatsu shaft 16 and interlocks with the movement of the measuring element. However, a measuring force by the return spring 22 is always applied via the sector gear 17 and the lever contact knock 17c. It acts in the opposite direction to the measurement direction.

  2 to 4, the sector gear 17 is supported by the gauge body 14 so as to be swingable in only one direction by the sector shaft 17a, as shown in FIGS. 10 (a) and 10 (b). Further, a gear portion 17b is provided at the end opposite to the sector shaft 17a, and a lever contact knock 17c that contacts the lever contact 15b of the lever 15 is provided between the sector shaft 17a and the gear portion 17b. ing. A return spring 22 is attached to the sector gear 17. The return spring 22 always urges the sector gear 17 so that the pointer 12a of the scale plate 12 always returns to 0 on the scale.

  The crown gear 18 is rotatably supported by the gauge body 14, and has an inner gear portion 18 a and an outer gear portion 18 b, as shown in FIG. 11, and the inner gear portion 18 a is the sector gear 17. The outer gear portion 18b meshes with a pinion gear 12c provided at the end of the rotating shaft 12b opposite to the pointer 12a while meshing with the gear portion 17b and rotating in response to the swing of the sector gear 17. Rotate 12a.

  The stem 19 is attached to the stem attachment portion 14 b of the gauge body 14 and covers the upper portion of the gauge body 14.

  As shown in FIGS. 1 to 4, the stoppers 20, 20 are attached by screwing into stopper mounting holes 14 d, 14 d (see FIG. 6, FIG. 7, etc.) provided at the tip of the gauge body 14. Thus, the movable range of the probe 11 is determined by contacting both side surfaces of the lever 15. In the lever type dial gauge 1 of the embodiment, as shown in FIG. 12, the stoppers 20 and 20 are arranged only in the left direction (positive direction) in which the measuring element 11 is the arrow direction in FIG. The movable range of the probe 11 is determined so that it moves and does not move in the right direction (negative direction) in FIG.

  Next, the dimension of each part required when calculating the magnification in the lever type dial gauge 1 of the embodiment according to the present invention will be described.

  FIG. 11 is an explanatory diagram showing dimensions of each part necessary for calculating an enlargement ratio in the lever type dial gauge 1 of the embodiment.

  In the lever type dial gauge 1 of the embodiment, the length L1 of the probe 14 is set to 14.18 mm which is 1.7 times or more longer than the length of the conventional probe 8.13 mm or less.

  In the lever type dial gauge 1 of this embodiment, as shown in FIG. 10, the length L2 (= 17.94 mm) from the tip of the measuring element 18 to the axis of the mass shaft 16 of the lever 15 is The length L3 (= 13.8 mm) from the axis of the Masatsu shaft 16 to the axis of the sector-shaft 17a of the sector gear 17 is made larger.

  In the lever type dial gauge 1 of this embodiment, the length L4 from the axis of the sector shaft 17a to the lever contact knock 17c in the sector gear 17 is extended from the tip of the measuring element 11 to the axis of the mass shaft 16 of the lever 15. , L3 from the axis of the mass shaft 16 of the lever 15 to the axis of the sector shaft 17a of the sector gear 17, and the length of the sector gear 17 from the axis of the sector shaft 17a to the gear portion 17b. It is determined by the length L5 and a predetermined enlargement ratio.

  That is, if the length L5 from the axis of the sector shaft 17a to the gear portion 17b in the sector gear 17 is 23,467 mm and the predetermined enlargement ratio is 6.248, the mass shaft of the lever 15 from the tip of the probe 18 The length L2 to the axis of 16 is 17.94 mm, and the length L3 from the axis of the Masatsu shaft 16 of the lever 15 to the axis of the sector shaft 17a of the sector gear 17 is 13.8 mm. The length of L4 is determined so as to satisfy the following equation.

  ((13.8 + L4) ÷ 17.94) × (23,467 ÷ L4) = 6.248

  Therefore, in the lever type dial gauge 1 of this embodiment, L4 from the axis of the sector shaft 17a to the lever contact knock 17c in the sector gear 17 can be obtained as about 3.65 mm based on the above formula. The knock 17c is provided at a position spaced apart from the axial center of the sector shaft 17a by about 3.65 mm of L4.

<Effect of Lever Type Dial Gauge 1 of Embodiment>
As described above, in the lever type dial gauge 1 of the embodiment, the length L2 from the tip of the measuring element 18 to the axis of the mass 15 shaft 16 of the lever 15 is determined from the axis of the mass 15 of the lever 15 to the sector gear 17. The length of the sector gear 17 from the axis of the sector shaft 17a to the lever contact knock 17c is greater than the length L3 of the sector shaft 17a. The length L2 to the axis of the shaft 16, the length L3 from the axis of the mass shaft 16 of the lever 15 to the axis of the sector-shaft 17a of the sector gear 17, and the axis of the sector shaft 17a in the sector gear 17 To the gear portion 17b is determined by the length L5L3 and the enlargement ratio.

  Therefore, according to the lever type dial gauge 1 of this embodiment, since the enlargement ratio does not change even if the measuring element 18 is lengthened, the tip of the measuring element 18 does not reach the part to be measured of the workpiece to be measured. As a result, the range of the measurement object is widened, and the measuring element 18 is not angled in order to avoid interference between the workpiece and the gauge body 14, and the occurrence of measurement errors can be reduced.

  That is, as shown in FIG. 13A, for example, in the case of a conventional lever-type dial gauge 1 ′ having a conventional measuring element 11 ′ having a length of 8.13 mm, the first inner peripheral surface W1 of the workpiece W is Although the inner diameter can be measured, the inner diameter of the second inner peripheral surface W2 of the workpiece W cannot be measured because the length of the measuring element 11 ′ is short.

  On the other hand, in the lever type dial gauge 1 of this embodiment, the length L1 of the probe 14 is 14.18 mm, which is 1.7 times longer than the length of the conventional probe 11 ', 8.13 mm. Therefore, as shown in FIG. 13B, the inner diameter of the first inner circumferential surface W1 of the workpiece W can be measured, and the inner diameter of the second inner circumferential surface W2 of the workpiece W can also be measured.

  In the lever type dial gauge 1 according to the embodiment of the present invention, the ground plate 13 is provided with three screw holes 13b to 13d as shown in FIGS. As shown in FIG. 6 (a), two screw holes 14e1 and 14e2 for fixing the base plate 13 are provided on the base plate mounting side surface 14e for fixing the base plate 13, and halfway from the base plate mounting side surface 14e. Since the screw hole 14f1 is also provided in the circular base plate receiving portion 14f, the base plate 13 and the gauge body 14 can be fixed with three screws (screws) 21 as shown in FIG. .

  Therefore, according to the lever type dial gauge 1 of the embodiment, the mounting strength of the ground plate 13 with respect to the gauge body 14 is improved, so that the ground plate 13 is loosened as compared with the case where the gauge body 14 is fixed with two screws. The occurrence of malfunction due to loosening of the base plate 13 can be prevented.

DESCRIPTION OF SYMBOLS 1 Lever type dial gauge 11 Measuring element 12 Scale plate 12a Pointer 12b Rotating shaft 12c Pinion gear 13 Base plate 13a Parts accommodating part 13b-13d Screw hole 14 Gauge body 14e Base plate attachment side surface 14e1, 14e2 Screw hole 14f Base plate receiving part 14f1 Screw hole 15 Lever 15a Massac shaft mounting hole 15b Lever contact 16a Massac shaft 16b Massac bearing 17 Sector gear 17a Sector-shaft 17b Gear portion 17c Lever contact knock 18 Crown gear 18a Inner gear portion 18b Outer gear portion 19 Stem 20 Stopper 21 Screw 22 Return spring W Workpiece (Measurement object)
W1 First inner peripheral surface W2 Second inner peripheral surface

Claims (3)

A scale plate indicated by a pointer attached to a rotating shaft that rotates by rotating the moving length of the probe tip according to a predetermined magnification, and
A ground plate to which the scale plate is attached;
A gauge body to which the main plate is fixed;
A lever provided on the gauge body so as to be swingable only in one direction via a Masatsu shaft, and a lever provided with a lever contact on the lever side at the upper end;
The gauge body is supported by a sector shaft so as to be swingable in only one direction, and a gear portion is provided at an end opposite to the lever, while the lever contact point between the gear portion and the sector shaft. A sector gear provided with a lever contact knock that contacts the
The gage body is rotatably supported and has a circumferential outer gear portion and an inner gear portion having the same rotation center and different diameters, and the inner gear portion meshes with a gear portion of the sector gear, A crown gear that rotates according to the swing of the sector gear, while the outer gear portion meshes with a pinion gear provided at an end of the rotating shaft opposite to the pointer, and rotates the pointer. Prepared,
The length from the tip of the measuring element to the axis of the lever's mass shaft is greater than the length from the axis of the lever's mass axis to the axis of the sector shaft of the sector gear, and in the sector gear The length from the axis of the sector axis to the lever contact knock, the length from the tip of the probe to the axis of the lever's mass axis, and the axis of the lever's mass axis to the sector axis of the sector gear A lever type dial gauge, which is determined by the length to the center, the length from the axis of the sector axis to the gear portion in the sector gear, and the predetermined enlargement ratio. The lever type dial gauge according to claim 1,
A lever-type dial gauge characterized in that a length from the tip of the measuring element to a shaft center of the lever's mass shaft is greater than a length from the shaft center of the lever's mass shaft to the lever contact knock of the sector gear. . The lever type dial gauge according to claim 1 or 2,
The gauge body has a substantially rectangular parallelepiped shape and is provided with at least two screw holes for fixing the ground plate on one side surface,
A side surface where the screw hole is provided is provided with a semicircular ground plate receiving portion protruding, and the ground plate receiving portion is provided with an additional screw hole for fixing the ground plate,
The lever type dial gauge, wherein the base plate is fixed to the gauge main body through screws in at least two screw holes without the one side surface and additional screw holes in the base plate receiving portion.

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