CN113970279B

CN113970279B - Digital screw micrometer

Info

Publication number: CN113970279B
Application number: CN202111250510.0A
Authority: CN
Inventors: 黄关山; 黄胤铭; 杨延勇; 刘唯伟; 刘将
Original assignee: Zhuhai City Polytechnic
Current assignee: Zhuhai City Polytechnic
Priority date: 2021-10-26
Filing date: 2021-10-26
Publication date: 2023-07-07
Anticipated expiration: 2041-10-26
Also published as: CN113970279A

Abstract

The utility model discloses a digital screw micrometer, which comprises a ruler frame, wherein an anvil and a fixed sleeve are arranged on the ruler frame, a micrometer screw is movably connected in the fixed sleeve, a movable sleeve is movably connected on the outer wall of the fixed sleeve, one end of the movable sleeve is connected with one end of the micrometer screw, an annular locking cavity is formed between the inner wall of the movable sleeve and the outer wall of the fixed sleeve, a passive locking mechanism is arranged in the annular locking cavity and comprises a pressing button, a transmission assembly and a locking piece which are sequentially connected in a transmission way, the pressing button movably penetrates through the movable sleeve, the locking piece is locked on the fixed sleeve, the pressing stroke of the pressing button enables the locking piece to be separated from the locking piece through the transmission assembly, and a reset piece is used for driving the pressing button to reset. The digital screw micrometer provided by the utility model has the advantages that the passive locking mechanism is integrated on the movable sleeve, so that the locking and unlocking are completely passive, the active operation is not needed, and the operation steps are saved.

Description

Digital screw micrometer

Technical Field

The utility model relates to a measuring technology, in particular to a digital spiral micrometer.

Background

Screw micrometers, also known as micrometer, are few measuring instruments that can achieve 0.01mm accuracy by means of mechanical construction. The screw micrometer in the prior art comprises a ruler frame, a measuring anvil and a fixed sleeve are arranged on the ruler frame, a micrometer screw is movably connected in the fixed sleeve, a movable sleeve is movably connected on the outer wall of the fixed sleeve, one end of the movable sleeve is connected with one end of the micrometer screw, wherein the screw structure of the movable sleeve is processed into threads with the screw pitch of 0.5mm, when the screw structure rotates in a screw sleeve of the fixed sleeve, the screw structure moves forwards or backwards and is equally divided into 50 divisions in the circumferential direction, the number of whole circles of screw rotation is measured by the score lines on the fixed sleeve at intervals of 0.5mm, the score lines on the circumference of the movable sleeve are used for measuring the part of the whole circles, and one decimal of the final measurement result is needed to be estimated and read, so that the 0.01mm precision is realized.

If the authorized bulletin number is CN212300156U and the authorized bulletin date is 2021, 1 and 15, the utility model named as micrometer measurement structure and micrometer is provided, which is similar to a spiral micrometer and comprises a measuring rod assembly, a fixed sleeve and a rotating piece; the end part of the measuring rod assembly extends into the fixed sleeve and is in sliding connection with the fixed sleeve, and the sliding direction is parallel to the axial direction of the fixed sleeve; the rotating piece is provided with a spiral groove in sliding fit with the measuring rod assembly, and is rotatably arranged in the fixed sleeve and drives the measuring rod assembly to slide relative to the fixed sleeve through the spiral groove.

Obviously, the small rotation of the movable sleeve in the measuring process can change the measuring result, and the locking knob is arranged on the screw micrometer for locking in the prior art, so that the defect of the prior art is that the active locking and unlocking operations of the locking knob are performed for a plurality of times in each measurement, and the use is more inconvenient.

Disclosure of Invention

The object of the present utility model is to provide a digital screw micrometer to solve the above-mentioned drawbacks of the prior art.

In order to achieve the above object, the present utility model provides the following technical solutions:

the utility model provides a digital spiral micrometer, includes the chi frame, be provided with anvil and fixed sleeve on the chi frame, swing joint has micrometer screw in the fixed sleeve, swing joint movable sleeve on the fixed sleeve outer wall, movable sleeve's one end with micrometer screw's one end is connected, movable sleeve's inner wall with form annular locking chamber between fixed sleeve's the outer wall, be provided with passive locking mechanism in the annular locking chamber, passive locking mechanism is including the press button, drive assembly and the locking piece that drive in proper order is connected, press button activity run through movable sleeve, the locking piece lock in on the fixed sleeve, press the stroke of press button through drive assembly makes the locking piece breaks away from the locking, the piece that resets is used for the drive press button resets.

The passive locking mechanism comprises two groups of pressing buttons, a transmission assembly and locking pieces, wherein the two groups of pressing buttons, the transmission assembly and the locking pieces are respectively arranged on two opposite sides of the movable sleeve.

According to the digital screw micrometer, the friction part is arranged on the outer wall of the fixing sleeve, and the locking piece is abutted to the friction part to realize locking.

In the digital screw micrometer described above, the friction portion has a plurality of tooth-like structures annularly arranged along the fixing sleeve.

In the digital screw micrometer described above, the locking member is a sharp portion that can be inserted between two of the toothed formations.

According to the digital screw micrometer, the locking piece is rotationally connected in the annular locking cavity, the transmission assembly comprises the middle column and the first pulling wire wound on the middle column, and two ends of the first pulling wire are respectively connected with the locking piece and the pressing button.

The digital spiral micrometer, the transmission component is a swinging rod, two ends of the swinging rod are respectively connected with the pressing button and the locking piece in a rotating mode, and the middle of the swinging rod is sleeved on the center column through a strip-shaped hole.

In the digital screw micrometer, the transmission assembly comprises at least two pressing buttons, and the pressing buttons and the locking piece are connected in series by the annular wires.

In the digital screw micrometer, the number of the pressing buttons is four, and the number of the locking pieces is more than two.

According to the digital screw micrometer, the reset piece drives any one of the pressing button, the transmission component and the locking piece to reset so as to drive the other two to reset.

In the technical scheme, the passive locking mechanism of the digital screw micrometer is integrated on the movable sleeve, the action of holding the movable sleeve by a measurer is automatically unlocked, and the action of releasing the movable sleeve realizes locking, so that the locking and the unlocking are completely passive, active operation is not needed, and operation steps are saved.

Drawings

For a clearer description of embodiments of the present application or of the solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments described in the present utility model, and that other drawings may be obtained according to these drawings for a person skilled in the art.

FIG. 1 is a schematic diagram of a digital screw micrometer according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a movable sleeve provided by an embodiment of the present utility model;

FIG. 3 is a schematic view of a pressing button according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram illustrating a structure of a passive locking mechanism according to another embodiment of the present utility model;

FIG. 5 is a schematic diagram illustrating an unlocking structure of a passive locking mechanism according to another embodiment of the present utility model;

FIG. 6 is a schematic structural diagram of a passive locking mechanism according to another embodiment of the present utility model;

fig. 7 is a schematic structural diagram of an anvil according to an embodiment of the present utility model.

Reference numerals illustrate:

1. a ruler frame; 2. measuring an anvil; 2.1, reference marks; 3. a fixed sleeve; 4. a micrometer screw; 5. a movable sleeve; 6. an annular locking cavity; 7. pressing the button; 8. a transmission assembly; 9. a locking member; 10. a friction part; 11. a reset member; 12. a force measuring spring; 13. an alignment mark; 14. and a display screen.

Detailed Description

In order to make the technical scheme of the present utility model better understood by those skilled in the art, the present utility model will be further described in detail with reference to the accompanying drawings.

As shown in fig. 1-7, the digital screw micrometer provided by the embodiment of the utility model comprises a ruler frame 1, wherein an anvil 2 and a fixed sleeve 3 are arranged on the ruler frame 1, a micrometer screw 4 is movably connected in the fixed sleeve 3, a movable sleeve 5 is movably connected on the outer wall of the fixed sleeve 3, one end of the movable sleeve 5 is connected with one end of the micrometer screw 4, an annular locking cavity 6 is formed between the inner wall of the movable sleeve 5 and the outer wall of the fixed sleeve 3, a passive locking mechanism is arranged in the annular locking cavity 6, the passive locking mechanism comprises a pressing button 7, a transmission assembly 8 and a locking piece 9 which are sequentially connected in a transmission manner, the pressing button 7 movably penetrates through the movable sleeve 5, the locking piece 9 is locked on the fixed sleeve 3, the pressing stroke of the pressing button 7 is used for enabling the locking piece 9 to be out of locking through the transmission assembly 8, and the reset piece 11 is used for driving the pressing button 7 to reset.

Specifically, the digital screw micrometer provided in the embodiments of the present utility model may refer to the prior art for the structure and working principle of the micrometer frame 1, the micrometer anvil 2, the micrometer screw 4, the digital device such as the display 14 and the fixed sleeve 3, etc., and not be described in detail, and the core innovation point of each embodiment of the present utility model is that the active locking mechanism disposed between the fixed sleeve 3 and the micrometer screw 4 in the prior art is replaced by the passive locking mechanism disposed between the movable sleeve 5 and the fixed sleeve 3, the passive locking mechanism includes a pressing button 7, a transmission component 8 and a locking member 9, a circular locking cavity 6 is disposed between the movable sleeve 5 and the fixed sleeve 3 at a position facing the rotation of the measurer, the circular locking cavity 6 is used for accommodating the passive locking mechanism, the pressing button 7 is movably disposed on the movable sleeve 5, one end of the pressing button is located on the outer wall of the movable sleeve 5, and the other end of the pressing button is located in the circular locking cavity 6, and the locking member 9 is movably disposed in the circular locking cavity 6, such as to be rotationally connected or reciprocally moved in the circular locking cavity 6, such that the reciprocal movement of the pressing button 7 is driven by the transmission component 8 or reciprocally moved by the transmission component 9, such as is reciprocally moved by the transmission component 8, which is a reciprocally moving mechanism, such as is known in the conventional transmission means. The locking element 9 has a locking position over the movement path, in which the locking element 9 abuts against the fixing sleeve 3 to achieve locking, which corresponds to the position before the pressing button 7 is not pressed. In this way, the pressing stroke of the pressing button 7 causes the locking member 9 to be disengaged from the lock through the transmission assembly 8.

In this embodiment, the reset element 11 is used to drive any one of the pressing button 7, the transmission assembly 8 and the locking element 9 to reset to implement the reset of the passive locking mechanism, so that the pressing button 7 is at a position where the end protrudes out of the outer wall of the movable sleeve 5 when not subjected to external force, and the locking element 9 is at a locked position, and the reset element 11 is usually a spring, such as the pressing button 7 is stretched by the spring to implement the reset when not pressed.

The digital screw micrometer provided by the embodiment of the utility model has the advantages that the passive locking mechanism is integrated on the movable sleeve 5, the action of holding the movable sleeve 5 by a measurer is automatically unlocked, and the action of releasing the movable sleeve 5 realizes locking, so that the locking and unlocking are completely passive, active operation is not needed, and the operation steps are saved.

In another embodiment of the present utility model, preferably, the passive locking mechanism includes two sets of pressing buttons 7, a transmission assembly 8 and a locking member 9, where the two sets of pressing buttons 7, the transmission assembly 8 and the locking member 9 are disposed on opposite sides of the movable sleeve 5, the two pressing buttons 7 are disposed on opposite sides of the movable sleeve 5, and the two pressing buttons 7 are respectively used for pressing two fingers of an operator, so that the present utility model is more ergonomic.

In still another embodiment of the present utility model, preferably, the outer wall of the fixing sleeve 3 is provided with a friction portion 10, and the locking member 9 abuts against the friction portion 10 to achieve locking, and the friction portion 10 is of various structures capable of lifting friction force, such as a spline structure, a tooth structure and other uneven structures, so as to lift the locking force of the locking member 9 on the fixing sleeve 3.

More preferably, as shown in fig. 4 and 5, the friction portion 10 is a plurality of tooth-like formations annularly arranged along the fixing sleeve 3, and the locking member 9 is a sharp portion that can be inserted between the two tooth-like formations.

In still another embodiment provided by the present utility model, as shown in fig. 4 and 5, further, the locking member 9 is rotatably connected to the annular locking cavity 6, the unlocking and locking can be achieved during the rotation process, the transmission assembly 8 includes a middle post and a first pulling wire wound on the middle post, two ends of the first pulling wire are respectively connected to the locking member 9 and the pressing button 7, optionally, a spring is disposed at the bottom of the pressing button 7 as a reset member 11 to enable the pressing button 7 to be in a protruding state in a normalizing manner, a torsion spring is disposed on the locking member 9 as a reset member 11 to enable the locking member 9 to be in a locking state in a normalizing manner, the pressing of the pressing button 7 drives the locking member 9 to swing through the first pulling wire, and the unlocking is achieved through the movement of the reset member 11.

In still another embodiment of the present utility model, as shown in fig. 6, further, the transmission component 8 is a swinging rod, two ends of the swinging rod are respectively connected with the pressing button 7 and the locking piece 9 in a rotating manner, the middle part of the swinging rod is sleeved on the central column through a strip-shaped hole, the swinging rod forms a teeterboard structure, the pressing button 7 moves down to drive the locking piece 9 to move up, and as the pressing button 7 moves linearly and reciprocally, the middle part of the swinging rod is sleeved on the central column through a strip-shaped hole, so that the swinging rod has a certain movement amplitude, and can swing and move.

In still another embodiment of the present utility model, as shown in fig. 2 and 3, further, the transmission assembly 8 includes at least two pressing buttons 7, the at least two pressing buttons 7 and locking members 9 are connected in series with the at least two pressing buttons 7, and the at least two locking members 9 may be one pressing button 7 or may be multiple pressing buttons 7, preferably, there are four pressing buttons 7, and the at least two locking members 9 are provided, which has the function that each pressing button 7 and each locking member 9 are linked to one pressing button, and in a normalized condition, the at least two pressing buttons 7 are pressed down to drive all locking members 9 to be out of a locked state, and the plurality of pressing buttons 7 may be uniformly arranged in the circumferential direction of the movable sleeve 5, so that an operator need not press one or two pressing buttons 7 located at a specific position at a time, but press any one pressing button at a time, which is more convenient to operate.

In order to facilitate the detachment of the locking piece 9, the pressing button 7 and the locking piece 9 are reset through springs, but the elastic coefficient of the spring corresponding to the pressing button 7 is larger than that of the spring corresponding to the locking piece 9, namely, for the same pressing, the motion amplitude corresponding to the locking piece 9 is larger, and when the pressing button 7 is pressed down, the amplitude of the annular wire pulling the locking piece 9 to be separated from the fixing sleeve 3 is larger than that of the other pressing buttons 7, so that the detachment of the locking piece 9 is more thorough.

In still another embodiment provided by the utility model, the measuring anvil 2 is also improved, the slide groove is arranged on the ruler frame 1, the measuring spring 12 is arranged at the bottom of the slide groove, the measuring spring 12 is used for obtaining constant measuring pressure in the use process, the measuring spring can be a common spring, the measuring force refers to the action of the measuring spring in a specific state, one end of the measuring anvil 2 is slidingly connected in the slide groove to squeeze the spring, the measuring anvil 2 is provided with a reference mark 2.1, the groove wall of the slide groove on the ruler frame 1 is provided with a transparent window, the transparent window is provided with an alignment mark 13, preferably, the reference mark 2.1 and the alignment mark 13 are all straight lines, obviously, other alignable marks can be used as the reference mark 2.1 and the alignment mark 13, and the two marks have coincident positions on the movable travel of the measuring anvil 2. The effect of setting up the spring is that the precision of spiral micrometer is higher, consequently the difference of the power of the rotation movable sleeve 5 can bring different measuring results when measuring each time, and the power size when the spring was extruded reference mark 2.1 and alignment mark 13 each time is invariable, also can realize measuring and selecting, and the pressure that the pressure applied to movable sleeve 5 was the same when guaranteeing to measure each time like this can not be because of different people, different measuring results are different, eliminates human error.

While certain exemplary embodiments of the present utility model have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the utility model, which is defined by the appended claims.

Claims

1. The digital screw micrometer comprises a ruler frame, wherein an anvil and a fixed sleeve are arranged on the ruler frame, a micrometer screw rod is movably connected in the fixed sleeve, a movable sleeve is movably connected on the outer wall of the fixed sleeve, one end of the movable sleeve is connected with one end of the micrometer screw rod, and the digital screw micrometer is characterized in that an annular locking cavity is formed between the inner wall of the movable sleeve and the outer wall of the fixed sleeve, a passive locking mechanism is arranged in the annular locking cavity and comprises a pressing button, a transmission assembly and a locking piece which are sequentially connected in a transmission manner, the pressing button movably penetrates through the movable sleeve, the locking piece is locked on the fixed sleeve, the pressing stroke of the pressing button is used for enabling the locking piece to be separated from locking through the transmission assembly, and the resetting piece is used for driving the pressing button to reset;

the passive locking mechanism comprises two groups of pressing buttons, a transmission assembly and a locking piece, wherein the two groups of pressing buttons, the transmission assembly and the locking piece are respectively arranged on two opposite sides of the movable sleeve, the transmission assembly comprises an annular wire, and the annular wire is connected with the pressing buttons and the locking piece in series.

2. The digital screw micrometer according to claim 1, wherein the outer wall of the fixing sleeve is provided with a friction portion, and the locking piece abuts against the friction portion to achieve locking.

3. The digital screw micrometer of claim 2, wherein the friction portion is a plurality of tooth-like formations annularly arranged along the stationary sleeve.

4. A digital screw micrometer according to claim 3, wherein the locking element is a sharp portion insertable between two of the toothed formations.

5. The digital screw micrometer of claim 1, wherein the locking member is rotatably connected to the annular locking cavity, the transmission assembly comprises a middle post and a first pulling wire wound on the middle post, and two ends of the first pulling wire are respectively connected to the locking member and the pressing button.

6. The digital screw micrometer of claim 5, wherein the transmission component is a swinging rod, two ends of the swinging rod are respectively connected with the pressing button and the locking piece in a rotating way, and the middle part of the swinging rod is sleeved on the middle column through a strip-shaped hole.

7. The digital screw micrometer of any one of claims 1-6, wherein the reset member drives any one of the push button, the transmission assembly, and the locking member to reset to drive the other two.