阅读说明：本技术 一种防止撞坏的百分表 (Anti-collision dial indicator ) 是由 方诗婷 杨旭 余娇 朱鑫 朱夕青 于 2021-09-18 设计创作，主要内容包括：本发明提供一种防止撞坏的百分表,涉及机械加工的量具领域,包括百分表本体、固定棒以及表头接头；所述百分表本体包括圆表盘以及连接在所述圆表盘上的套管、量杆；所述固定棒组件包括用于安装在机床主轴上的直杆、卡头、4根长弹性圆钢、2块大夹板；2块大夹板：组合成一个直径8毫米的大圆柱腔；所述卡头卡接在百分表本体的套管上；所述表接头组件由接头主体、4根短弹性圆2块小夹板钢组成；两个小夹板：第一小夹板、第二小夹板组合成一个直径4或5毫米的小圆柱腔；本发明的有益之处是,不仅固定方便、不容易松动,并且在固定棒组件以及表接头组件两个组件里,分别使用4根长弹性圆钢、4根短弹性圆钢、使百分表的抗损坏性更好。(The invention provides a collision damage prevention dial indicator, which relates to the field of measuring tools for machining and comprises a dial indicator body, a fixing rod and a gauge head joint; the dial indicator body comprises a round dial plate, a sleeve and a measuring rod, wherein the sleeve and the measuring rod are connected to the round dial plate; the fixing rod assembly comprises a straight rod, a chuck, 4 long elastic round steels and 2 large clamping plates, wherein the straight rod and the chuck are arranged on a main shaft of the machine tool; 2 large splints: a large cylindrical cavity with the diameter of 8mm is formed by combination; the clamping head is clamped on the sleeve of the dial indicator body; the meter connector assembly consists of a connector main body and 2 small clamping plate steels of 4 short elastic circles; two small splints: the first small splint and the second small splint are combined into a small cylindrical cavity with the diameter of 4 or 5 mm; the dial indicator has the advantages that the dial indicator is convenient to fix and not easy to loosen, and 4 long elastic round steels and 4 short elastic round steels are respectively used in the fixing rod assembly and the indicator joint assembly, so that the dial indicator is better in damage resistance.)

1. A percentage table for preventing collision damage is characterized by comprising a percentage table body, a fixing rod and a table head joint; the dial indicator body comprises a round dial plate, a sleeve and a measuring rod, wherein the sleeve and the measuring rod are connected to the round dial plate; the fixing rod assembly comprises a straight rod, a chuck, 4 long elastic round steels and 2 large clamping plates, wherein the straight rod and the chuck are arranged on a main shaft of the machine tool; the clamping head is clamped on the sleeve of the dial indicator body; the meter connector assembly consists of a connector main body, 4 short elastic circles and 2 small clamping plate steels.

2. The crash proof dial gauge of claim 1, wherein one end of said fixing bar assembly is a straight bar, a chuck for mounting on a spindle of a machine tool; the straight rod is inserted into the cylindrical hole in the middle of the chuck, and the straight rod is in interference fit with the cylindrical hole in the middle of the chuck, so that the straight rod and the chuck are integrated after being inserted into the cylindrical hole in the middle of the chuck;

the other end of the fixed rod component is provided with 4 long elastic round steels and 2 large clamping plates; 2 large splints form a large cylindrical cavity with a hole with the diameter size of 8 (negative deviation) millimeters; the diameter size of the large cylindrical cavity is 8mm (negative deviation) which is slightly smaller than the diameter size of the measuring rod 2, namely 8 mm.

3. The crash proof dial indicator according to claim 1, wherein one end of the gauge head assembly is a gauge head body, the gauge head body is provided with an internal thread, and the internal thread is connected with an external thread of the measuring head; preferably, the first small clamping plate and the second small clamping plate are arc-shaped plates, and an M2.5 internal thread is arranged in the joint main body and is used for being connected with an M2.5 external thread on the measuring head;

the other end of the joint assembly is provided with an open small cylindrical cavity, and the open small cylindrical cavity is used for clamping the measuring rod; the diameter of the small cylindrical cavity of the opening is determined by a measuring rod of a dial indicator, the outer diameter of the measuring rod of the dial indicator is 4 or 5 millimeters, and the diameter of the small cylindrical cavity of the opening is 4 (negative deviation) or 5 (negative deviation) millimeters; in this way, a tighter fit is produced; formation of the small cylindrical cavity of the opening: the first clamping plate and the second clamping plate are connected to the joint main body through elastic round steel to form an open small cylindrical cavity in a combined mode.

4. The crash-proof dial indicator according to claim 3, wherein the 2 large clamping plates of the fixing rod assembly are arc-shaped plates, each arc-shaped plate comprises an outer arc and an inner arc, and the clamping plates are designed with the inner arcs to be better attached to the straight rod; the outer contour of the large splint is a cuboid with the thickness of 16 mm X12 mm X5 mm, the inner diameter of one side is determined by a straight rod, the outer diameter of the straight rod is 8mm, and the inner diameter of the large splint is 8 mm; the outer diameter of the straight rod and the inner diameter of the inner circle formed by the two large clamping plates are tightly matched, and the straight rod is realized by adjusting the straightness of the long elastic round steel.

5. The crash-proof dial indicator according to claim 3, wherein the first and second small clamping plates of the connector assembly are arc-shaped plates, each arc-shaped plate comprises an outer arc and an inner arc, and the clamping plates are designed with the inner arcs to better fit the measuring rod; the outer circle diameter is 10.0 mm, the inner circle diameter is determined by a measuring rod of a dial indicator, the outer diameter of the measuring rod of the dial indicator is 4 or 5 mm, and the inner circle diameters of a first small clamping plate and a second small clamping plate of the joint assembly are 4 or 5 mm; the measuring rod of the dial indicator and an inner circle formed by the first small clamping plate and the second small clamping plate of the joint assembly can be tightly matched and is realized by adjusting the straightness of the short elastic round steel; the height of the arc-shaped plate is 5 mm; the diameters of the 2 small through holes of the first small clamping plate or the second small clamping plate are all 1.5 mm; the centers of the 2 small through holes are on a circle with the diameter of 7 mm and the center of an outer contour circle with the diameter of 10 mm, and are at the position with the distance of 1.2 mm from the front and back symmetrical planes.

6. The crash proof dial gauge of claim 3, wherein the cartridge of the fixing bar assembly has an outer profile of a rectangular parallelepiped of 16 mm X16 mm X8 mm, and the diameters of the through holes in the center are all 1.5 mm; the distance between the 2 small through holes is 2.4 mm in the transverse direction and the longitudinal direction.

7. The crash proof dial indicator according to claim 3, wherein the nipple body of the nipple assembly has an outer contour of a partially cylindrical body with a diameter of 10 mm X5 mm, which is a front and rear face cut off, i.e., the nipple body has a height of 5 mm, wherein the threaded through hole having a middle lunch in the up-down direction is M2.5; the diameters of the 4 small through holes are all 1.5 mm; the centers of the 4 small through holes are on a circle with the diameter of 7 mm, and are at the position with the distance of 1.2 mm from the front and back symmetrical planes.

8. A crash proof dial gauge as claimed in claim 3, wherein the length of resilient round steel of the fixed bar assembly is preferably: 128mm long and 1.5 mm diameter; the dimensions of the short resilient round bar of the joint assembly, preferably: 14 mm in length and 1.5 mm in diameter.

Technical Field

The invention relates to the field of machining measuring tools, in particular to a dial indicator capable of preventing collision damage.

Background

The dial indicator is a general length measuring instrument of a meter type made by utilizing a precise rack and pinion mechanism, and basically comprises a measuring head, a measuring rod, a shockproof spring, a rack, a gear, a hairspring, a round dial and a pointer.

However, the currently used dial gauge has the following defects: (1) easy to damage: in the machining process of a machine tool, a dial indicator is generally used for measuring a machined workpiece, however, when the shape of a part to be machined is large at the top and small at the bottom (as shown in fig. 1), and the part needs to be turned around up and down, an operator often forgets to turn the dial indicator by an angle to directly lift the dial indicator due to hurry or negligence, so that a measuring rod of the dial indicator directly impacts the upper part of the workpiece, the head of the dial indicator is damaged, and the dial indicator is directly scrapped, so that waste is caused; (2) is not favorable for accurate fixation: the dial indicator used at present is basically fixed by a small universal meter base, but the small universal meter base is too many in connection links and is easy to loosen, and the magnetic base of the small universal meter base is easy to loosen, so that errors or errors are easily caused.

Disclosure of Invention

The invention overcomes the defects in the prior art, provides the dial indicator capable of preventing the dial indicator from being damaged by collision, is convenient to fix and not easy to loosen, can effectively prevent the indicator head of the dial indicator from being damaged due to the fact that the measuring rod directly collides with a workpiece, and prolongs the service life.

In order to solve the technical problems, the invention is realized by the following technical scheme:

a percentage table for preventing collision damage is characterized by comprising a percentage table body, a fixing rod and a table head joint; the dial indicator body comprises a round dial plate, a sleeve and a measuring rod, wherein the sleeve and the measuring rod are connected to the round dial plate; the fixing rod assembly comprises a straight rod, a chuck, 4 long elastic round steels and 2 large clamping plates, wherein the straight rod and the chuck are arranged on a main shaft of the machine tool; the clamping head is clamped on the sleeve of the dial indicator body;

the meter connector assembly consists of 1 connector main body and 2 small clamping plates of 4 short elastic circles.

One end of the fixed rod component is provided with a straight rod and a chuck which are used for being arranged on a main shaft of the machine tool; the straight rod is inserted into the cylindrical hole in the middle of the chuck, and the straight rod is in interference fit with the cylindrical hole in the middle of the chuck, so that the straight rod and the chuck are integrated after being inserted into the cylindrical hole in the middle of the chuck;

the other end of the fixed rod component is provided with 4 long elastic round steels and 2 large clamping plates; 2 large splints form a large cylindrical cavity with a hole with the diameter size of 8 (negative deviation) millimeters; the diameter size of the large cylindrical cavity is 8mm (negative deviation) which is slightly smaller than the diameter size of the measuring rod 2, namely 8 mm.

One end of the meter joint component is a meter joint main body, the meter joint main body is provided with an internal thread, and the internal thread is connected with an external thread of the measuring head; preferably, the first small clamping plate and the second small clamping plate are arc-shaped plates, and an M2.5 internal thread is arranged in the joint main body and is used for being connected with an M2.5 external thread on the measuring head;

the other end of the joint assembly is provided with an open small cylindrical cavity, and the open small cylindrical cavity is used for clamping the measuring rod; the diameter of the small cylindrical cavity of the opening is determined by a measuring rod of a dial indicator: optimally, the outer diameter of the measuring rod of the dial indicator is 4 mm, and the diameter of the small open cylindrical cavity is also 4 (negative deviation) mm; in this way, a tighter fit is produced; formation of the small cylindrical cavity of the opening: the first clamping plate and the second clamping plate are connected to the joint main body through elastic round steel to form an open small cylindrical cavity in a combined mode.

The 2 big splint of fixed excellent subassembly are the arc, and the arc includes outer circular arc and inner circular arc, and the splint design inner circular arc enables it better with the straight-bar laminating. The outer contour of the large splint is a cuboid with the thickness of 16 mm X12 mm X5 mm, the inner diameter of one side is determined by a straight rod, the outer diameter of the straight rod is 8mm, and the inner diameter of the large splint is 8 mm; the outer diameter of the straight rod and the inner diameter of the inner circle formed by the two large clamping plates are tightly matched, and the straight rod is realized by adjusting the straightness of the long elastic round steel.

The outside of the first little splint of joint Assembly and the little splint of second is the straight line, and the inboard is the arc, and with arc cylinder axis vertically direction, every splint all have 2 little cylinder through-holes, inboard arc can laminate with sheathed tube outer cylinder face: the diameter of the inner arc is consistent with that of a sleeve of the dial indicator, optimally, the outer diameter of the sleeve of the dial indicator is 8mm, and the inner diameters of a first small clamping plate and a second small clamping plate of the joint assembly are 8 mm; the sleeve of the dial indicator and the inner circle formed by the first small clamping plate and the second small clamping plate of the joint assembly can be tightly matched, and the degree of tightness of the matching between the short elastic round steel and the short elastic round steel can be adjusted by adjusting the straightness of the short elastic round steel; the height of the arc-shaped plate is 8 mm; optimally, the diameters of the 2 small cylindrical through holes of the first small clamping plate or the second small clamping plate are both 1.5 mm; the distance between the center of the 2 small through holes and every two of the 4 cylindrical holes on the chuck is consistent, and optimally, the distance is 12 mm.

The outer contour of the chuck of the fixing rod component is a cuboid with 16 mm X16 mm X8 mm, and the diameters of the through holes in the middle are all 1.5 mm; the distance between the 2 small through holes is consistent in the transverse direction and the longitudinal direction, and optimally, the distance is 12 mm.

The outer contour of the joint body of the joint assembly is an incomplete cylinder with a diameter of 10 mm X5 mm and with a front surface and a rear surface cut off, namely the height of the joint body is 5 mm, wherein the threaded through hole with the middle lunch in the up-down direction is M2.5; the diameters of the 4 small through holes are all 1.5 mm; the centers of the 4 small through holes are on a circle with the diameter of 7 mm, and are at the position with the distance of 1.2 mm from the front and back symmetrical planes.

4 long elastic round steels of the fixed rod assembly and 4 short elastic round steels of the joint assembly; preferentially: the length of the long and short elastic round steel of the fixed rod assembly is 22 mm, and the diameter of the long and short elastic round steel is 1.5 mm; the short resilient round steel of the joint assembly is 14 mm long and 1.5 mm in diameter.

Compared with the prior art, the invention has the beneficial effects that:

(1) simple structure, fixed back are difficult not hard up: before the dial indicator is used, the straight rod of the fixing rod is installed on a main shaft of a machine tool and fixed, and then the measuring rod of the dial indicator body is clamped to the first through hole of the clamping head, so that the dial indicator can be used;

because the long elastic round steel provides elastic force to the large clamping plate, the dial indicator body is firmly fixed on the fixed rod and is not easy to loosen,

due to the fact that the short elastic round steel is arranged, elastic force can be provided for the small clamping plate, the measuring head is firmly fixed on the measuring rod of the dial indicator, and looseness is not prone to occurring;

compared with the traditional mode of fixing the dial indicator by using a universal small gauge stand, the fixing rod has a simpler and firmer structure and can better meet the requirement of finding the center of a workpiece for tool setting;

(2) is not easy to be broken by collision: when the dial indicator body needs to be lifted when the size of a measured workpiece is measured, if the dial indicator is forgotten to be rotated away and is directly lifted, misoperation of enabling the joint or the measuring head to collide with the workpiece is caused, the joint is sleeved with the measuring rod, the dial indicator body can be deviated or dropped at most, the breakage and the damage of the dial indicator head cannot be caused, and the purpose of protecting the dial indicator is achieved.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, with the understanding that the present disclosure is to be considered as an exemplification of the invention and is not intended to limit the invention to the embodiments illustrated in the drawings, in which:

fig. 1 is a schematic diagram of the use of a conventional dial indicator.

Fig. 2 is a schematic diagram of the use of the damage prevention dial indicator of the present invention.

FIG. 3 is a diagram of the assembled dimensions of the fixed bar assembly of the new dial indicator.

Fig. 4 is a schematic structural view of the fixing bar assembly.

FIG. 5 is a chuck for holding a rod assembly.

Fig. 6 is a large splint holding the rod assembly.

FIG. 7 is an assembly view of a connector assembly of a crash proof dial gauge.

Fig. 8 is a schematic view of the measuring rod, joint assembly and probe assembly.

FIG. 9 is a dimensional view of the fitting assembly of a crash proof dial gauge.

FIG. 10 is a connector body of the connector assembly.

FIG. 11 is a pair of small clamping plates of a 'meter connector component' and 2 small clamping plates for clamping a 'measuring rod' of a dial indicator;

FIG. 12 is a short spring bar of watch dog assemblies, each watch dog assembly having 4 spring bars 13 mm long and 1.5 mm in diameter;

FIG. 13 is four of the "watch dog" assembly: the measuring head consists of an external thread with the length of 5.0 mm and the like;

FIG. 14 shows the elongated resilient round bar of the fixing bar assembly;

figure 15 is a straight rod.

In the figure: the measuring tool comprises a dial gauge 1, a disc gauge 2, a measuring rod 3, a straight rod 4, a clamping head 41, a first through hole 43, elastic round steel 5, a groove 51, a first clamping plate 52, a second clamping plate 6, a gauge joint main body 61, an internal thread 61, a measuring head 7, an external thread 71, a workpiece 8, a joint 9 and a sleeve 10.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, it being understood that the preferred embodiments described herein are merely illustrative and explanatory of the invention, and are not restrictive thereof;

as shown in fig. 1, which is a schematic use diagram of a conventional dial indicator, when a lower portion of a workpiece 8 is measured, if the dial indicator is lifted up after the dial indicator is forgotten to be rotated away, a measuring rod 2 or a measuring head 7 may collide with the upper portion of the workpiece 8, so that the measuring rod 2 is deformed or broken or a screw of the measuring head 7 is deformed or broken, and the whole dial indicator may lose transmission performance and be directly discarded;

as shown in FIG. 2, the anti-collision dial indicator of the invention comprises a dial indicator body, a fixing rod and a joint;

the dial indicator body comprises a round dial plate 1, a sleeve 10 connected to the round dial plate 1 and a measuring rod 2;

as shown in fig. 3 and 4, the fixing rod assembly comprises a straight rod 3 for being mounted on a machine tool spindle, a chuck 4 is connected to the straight rod, and the chuck 4 is clamped on a measuring rod 2 of the joint assembly;

the fixing rod assembly comprises a straight rod 3, a chuck 4, 4 long elastic round steel 42 and 2 large clamping plates 42 which are arranged on a machine tool spindle;

the straight rod 3 is inserted into a cylindrical hole in the middle of the chuck 4, and the straight rod is in interference fit with the hole in the middle of the chuck, so that the straight rod 3 and the chuck are integrated after being inserted into the cylindrical hole in the middle of the chuck 4;

FIG. 4 is a schematic view of the construction of the fastening bar assembly, with 2 large clamping plates 42 forming a through hole 43 with a diameter dimension of 8 (minus) millimeters; the diameter size 8 (negative deviation) millimeter of the through hole 43 is slightly smaller than the diameter size 8 millimeter of the measuring rod 2;

the fixing principle of the fixing rod is as follows: because the diameter of the through hole 43 is smaller than that of the measuring rod 2, the 4 long elastic round steels 42 can provide elastic force to the through hole 43, and the center of the rod 2 can be coincided with the center of the through hole 43 by the amount of the elastic round steels, so that the measuring rod 2 is clamped tightly, the dial indicator body is firmly fixed on the fixing rod and is not easy to loosen; if the measuring rod 2 slightly deviates from the central position of the through hole 43 under the action of a large external force, after the large external force disappears, the center of the measuring rod 2 is superposed with the central position of the through hole 43 under the action of the elastic round steel;

as shown in fig. 5, one end of the joint assembly is provided with a slot 5, the other end is provided with an internal thread 61, the internal thread 61 is in threaded connection with the measuring head 7, the slot 5 is formed by combining a first clamping plate 51 and a second clamping plate 52 for clamping the measuring rod 2, the measuring rod 2 is sleeved in the slot 5, the joint assembly and the measuring rod 2 are fixed through the first clamping plate 51 and the second clamping plate 52, preferably, the first clamping plate 51 and the second clamping plate 52 are arc-shaped plates, the joint body (6) is internally provided with the internal thread 61, and the measuring head 7 is provided with an external thread 71 matched with the internal thread 61;

as shown in fig. 6, which is a schematic connection diagram of the measuring rod 2, the joint 9 and the measuring head 7, the joint 9 is used for relatively fixing the measuring rod 2 and the measuring head 7 together, when a workpiece with a large upper part and a small lower part is machined, although the dial indicator is forgotten to rotate away and the dial indicator is directly lifted up, so that the joint 9 or the measuring head 7 collides with the workpiece, only one relative movement between the joint 9 and the measuring rod 2 is caused, the joint 9 is separated from the measuring rod 2 or the joint 9 and the measuring rod 2 are deviated, the measuring rod or the measuring head of the dial indicator cannot be damaged, and a protection effect is achieved.

Preferably, the measuring rod 2 and the slot 5 are matched under the clamping force generated by short elastic round steel with the diameter of 1.5 mm, so that the assembly is firm and the looseness is not easy to occur.

Preferably, the total height of the fixing rod assembly is 146 mm, wherein the height of the straight rod 2 is 128mm, the height of the clamping head assembly is 26mm, the clamping head assembly comprises 8mm in height, 4 pieces of long elastic round steel are 26mm in height, and 2 large clamping plates are 12 mm in height;

the overall length of the joint assembly is 14 mm, with a joint body 5 mm long, 4 long resilient round bars and 2 cleats each 14 mm long and 5 mm long.

Finally, it should be noted that: although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.