CN2036269U

CN2036269U - Vernier caliper

Info

Publication number: CN2036269U
Application number: CN 88215546
Authority: CN
Inventors: 张福增
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-11-01
Filing date: 1988-11-01
Publication date: 1989-04-19

Abstract

The utility model relates to a novel vernier caliper which comprises a main vernier caliper, a vernier, an upper vernier caliper pin, lower vernier caliper pins, a fine adjustment device, etc. The utility model is characterized in that two lower vernier caliper pins are of an L-shaped structure, two contact heads are arranged on the contact surface of a vernier frame and the fine adjustment device, a fine adjustment guide shaft is fixed on a fine adjustment turn knob, and the vernier frame is matched with the fine adjustment guide shaft in a thread mode. The novel vernier caliper has various measurement functions of an ordinary vernier caliper and can conveniently and exactly measure the bore diameter of a step, and the novel vernier caliper is suitable for the field of mechanical processing.

Description

Vernier caliper

The utility model relates to a kind of novel vernier caliper, belongs to the survey instrument technical field.

Vernier caliper is a kind of important survey instrument of field of machining, is mainly used in the inside and outside circular diameter of measuring workpieces more accurately and length etc.But existing vernier caliper can not directly be surveyed the stepped hole internal diameter.The method of existing survey stepped hole internal diameter normally is used by clamp and ruler or clamp and common calliper, so just makes measuring process complicated, also is difficult for drawing simultaneously accurate result.

The purpose of this utility model provides a kind of novel vernier caliper that can directly survey the stepped hole internal diameter.

The utility model is the improvement to existing vernier caliper, comprises main scale, vernier, each several parts such as card base, micromatic setting, vernier adjustment knob, fastening bolt up and down.

One of feature of the present utility model is that two following card bases are L shaped structure, and the measurement function of card base under the existing vernier caliper is continued to keep in L shaped inboard, and the outside is used to measure the stepped hole internal diameter.

Two of feature of the present utility model, be that two semispheres or semicircle contact are arranged on vernier scale frame and the micromatic setting surface of contact, simultaneously, the guide shaft of micromatic setting by former be secured in to change on the vernier caliper be fixed on the vernier adjustment knob, the vernier scale frame has a threaded hole corresponding to the axial positions of guide shaft, is threaded engagement with guide shaft.

The concrete grammar that the utility model vernier caliper is surveyed stepped hole is:

1, regulates vernier adjustment knob 6, make the fine setting surplus of contact M, N and the left surface maintenance 1～2mm of micromatic setting 5 on the vernier scale frame 2;

2, the last card base with chi stretches in the stepped hole of measured workpiece, spurs vernier scale frame 2 to the right, and bigness scale stepped hole internal diameter screws fastening bolt 8 then;

3, rotary fine adjustment knob 6 accurate measurement step apertures screw fastening bolt 7, at this moment can read registration S from chi, and by formula φ=S+2m draw step aperture value φ.Here m is the length of L shaped card base horizontal ends, is a stationary digital.

Direct reading inconvenience maybe need keep registration S if the position of workpiece or situation make, then continue to be undertaken by following step:

4, unclamp fastening bolt 8, regulate fine setting knob 6 left side survey face of micromatic setting 5 is abutted against on the summit of contact M, N, screw fastening bolt 8;

5, unclamp fastening bolt 7, rotary fine adjustment knob 6 is thrown off vernier scale frame 2 and micromatic setting 5, and the vernier scale frame is moved to left to a certain position that can take out long pin, takes out slide calliper rule;

6, vernier scale frame 2 is moved to right, rotary fine adjustment knob 6 is adjacent to the left surface of contact M, N summit and micromatic setting 5, reads registration S, draws step aperture value φ by φ=S+2m.

The workpiece that has stepped hole is extremely general, particularly in mechanical industry.For example, need to add undercut on some bearing seat to satisfy technological requirement, undercut and bearing saddle bore form stepped hole, adopt this novel vernier caliper measurement just very convenient and accurate.

The stepped hole of the utility model vernier caliper measurement comprises non-circular hole certainly, as square stepped hole etc.

Embodiment further describes the utility model below in conjunction with accompanying drawing.

Fig. 1 always schemes for structure, and among the figure: 1 is main scale, and 2 is the vernier scale frame, and 3 is last card base, and 4 are following card base, and 5 be micromatic setting, and 6 are the fine setting knob, and 7,8 be fastening bolt, and 9 is to finely tune guide shaft;

Fig. 2 is the vernier scale frame, and among the figure, M, N are contact;

Fig. 3 be among Fig. 2 A to partial view;

Fig. 4 be among Fig. 2 C to partial view

Fig. 5 is a vernier adjustment knob and the figure that combines of guide shaft;

Fig. 6 is the partial structurtes cut-open view of micromatic setting, and among the figure: 10 is the vernier adjustment knob cover plate, is that 11 is the cover plate trip bolt for the design of the vernier adjustment knob of mounting strap guide shaft.

Claims

1, a kind of novel vernier caliper, comprise main scale, vernier, parts such as card base, micromatic setting, vernier adjustment knob, fine setting guide shaft, fastening bolt up and down, feature of the present utility model is, two following card bases are L shaped structure, two semispheres or semicircle contact are arranged on vernier scale frame and the micromatic setting surface of contact, the fine setting guide shaft is fixed on the vernier adjustment knob, and the vernier scale frame has a threaded hole corresponding to the axial positions of guide shaft, is threaded engagement with guide shaft.