阅读说明：本技术 一种测量跨棒距用快速固定量棒工具 (Quick fixing measuring rod tool for measuring cross rod distance ) 是由 王佳迅 李龙生 李智化 耿旭 李月 于 2019-09-30 设计创作，主要内容包括：本发明公开了一种测量跨棒距用快速固定量棒工具；轴套可滑动地固定安装在固定套的一端；各量棒分别穿在固定套与轴套之间的限位通槽内并由限位挡块限位；推杆滑动安装在轴套的轴向变径孔内,推杆前端限位在变径孔的前端；各楔块安装在轴套的各径向安装孔内,里端面可滑动地顶接在轴套的中间锥形面上；自紧螺旋弹簧A套在各楔块和轴套上,间隙装配在凹槽A内；固定套另一端安装轴杆,该另一端除端部有轴杆轴肩挡位外,其余部分的壁薄,在薄壁上设置有凹槽B和测量窗口,各自紧螺旋弹簧B套并压在薄壁和各量棒上,装配在凹槽B内。使用本发明能快速、准确地将量棒固定在被测量轴杆上,固定可靠性高,大大提高了工作效率。(The invention discloses a rapid fixed measuring rod tool for measuring a cross rod distance; the shaft sleeve is fixedly arranged at one end of the fixed sleeve in a sliding way; each measuring rod is respectively penetrated in a limiting through groove between the fixed sleeve and the shaft sleeve and limited by a limiting stop block; the push rod is slidably arranged in the axial reducing hole of the shaft sleeve, and the front end of the push rod is limited at the front end of the reducing hole; each wedge block is arranged in each radial mounting hole of the shaft sleeve, and the inner end surface of each wedge block is slidably abutted on the middle conical surface of the shaft sleeve; the self-tightening spiral spring A is sleeved on each wedge block and the shaft sleeve, and is assembled in the groove A in a clearance mode; the other end of the fixed sleeve is provided with a shaft lever, the other end is provided with a shaft lever shaft shoulder gear, the other part of the other end is thin, the thin wall is provided with a groove B and a measuring window, and the spiral springs B are respectively tightly sleeved on the thin wall and each measuring rod and assembled in the groove B. The measuring rod can be quickly and accurately fixed on the measured shaft lever by using the invention, the fixing reliability is high, and the working efficiency is greatly improved.)

1. The utility model provides a measure and stride excellent distance with quick fixed measuring stick instrument which characterized in that: the self-tightening spiral spring device comprises a fixed sleeve, a shaft sleeve, an even number of measuring rods, wedge blocks, push rods, self-tightening spiral springs A and more than two self-tightening spiral springs B, wherein the number of the wedge blocks is the same as that of the measuring rods; the fixed sleeve is provided with an internal spline matched with the external spline of the shaft lever; the shaft sleeve is slidably arranged at one end of the fixed sleeve and is fixed on the fixed sleeve by a detachable fixing piece; axial limiting through grooves which are assembled with each measuring rod in a clearance mode are arranged between the fixed sleeve and the shaft sleeve in a pairwise symmetry mode, and radial limiting holes communicated with the limiting through grooves are formed in the inner end, in contact with the shaft sleeve, of the end of the fixed sleeve; each measuring rod penetrates through the limiting through groove and is limited by a limiting stop block which is positioned in the limiting hole and fixed on the limiting through groove; the diameter of the front end part of the shaft sleeve is reduced, and a space for relative movement with the limit stop block is reserved; radial mounting holes which are in sliding fit with the wedge blocks are respectively formed in the positions of the shaft sleeve corresponding to the measuring rods; the shaft sleeve is provided with an axial reducing hole with a large front end diameter, the push rod with a handheld position at the rear end is slidably arranged in the axial reducing hole of the shaft sleeve, the diameter of the front end of the push rod is large, and the push rod is limited at the front end of the reducing hole; the middle of the shaft sleeve is conical; each wedge block is arranged in each radial mounting hole of the shaft sleeve, the inner end surface of each wedge block is an inclined cambered surface matched with the conical surface of the push rod, and the inclined cambered surface is slidably abutted on the conical surface of the shaft sleeve; the excircle of the same position of the outer end surface of each wedge block and the shaft sleeve is provided with a circle of groove A matched with the self-tightening spiral spring A, the groove A and the shaft sleeve have the same central shaft, the self-tightening spiral spring A is sleeved on each wedge block and the shaft sleeve, and the self-tightening spiral spring A is assembled in the groove A in a clearance way; the other end of the fixed sleeve is provided with a shaft lever, the other end is provided with a shaft lever shaft shoulder gear, the wall of the other part is thin, the thin wall is provided with grooves B which have the same number as the self-tightening spiral springs B and are matched with the shaft sleeve and have the same central shaft, the thin wall is provided with a measuring window at the position with a measuring rod, and the self-tightening spiral springs B are sleeved on the thin wall and are pressed on the measuring rod respectively and are assembled in the grooves B.

2. The tool of claim 1 for measuring cross-rod distance with a fast fixed gauge rod, wherein: the fixing piece detachably fixing the shaft sleeve on the fixing sleeve is a jackscrew, and the shaft sleeve is jacked and fixed by the jackscrew fixed in a radial hole of the fixing sleeve.

3. The tool of claim 1 or 2 for measuring cross-rod distance with a fast fixed gauge rod, wherein: the limit stop fixed on the measuring rod is a lantern ring in interference fit with the measuring rod.

4. The tool of claim 3 for measuring cross-rod distance with a fast fixed gauge rod, wherein: the shaft lever shaft shoulder at the other end of the fixed sleeve is a conical surface matched with the conical surface of the shaft lever shaft shoulder on the inner wall surface of the fixed sleeve at the end.

5. The tool of claim 1 or 2 for measuring cross-rod distance with a fast fixed gauge rod, wherein: the shaft lever shaft shoulder at the other end of the fixed sleeve is a conical surface matched with the conical surface of the shaft lever shaft shoulder on the inner wall surface of the fixed sleeve at the end.

Technical Field

The invention relates to a quick fixed measuring rod tool for measuring the span rod distance of an involute external spline of a shaft lever of a driving shaft.

Background

The cross-rod distance of the involute external splines is a critical dimension which needs to be controlled by a shaft lever of the driving shaft, and the dimension is not well controlled, so that the press-fitting force of the shaft lever and the matched internal splines during press-fitting is too large or too small. Measurement of the cross-bar distance is important. The conventional method for measuring the span rod distance of the involute spline of the shaft lever at present comprises the following steps: firstly, a measuring bar is placed in a tooth groove by a hand and is pressed by a thumb, then another measuring pair tooth on the spline is found out, another measuring bar is placed in the tooth groove and is pressed by the forefinger of the same hand, and finally, the outside micrometer is held by the other hand for measurement. The above operation is repeated to measure the distance across the rod in the other vertical direction. The fixed measuring rod mode needs to occupy one hand, and measuring rod falling or measuring errors caused by a plurality of staggered teeth in the measuring process often occur. The mode of fixing the measuring rod by hands has low efficiency, is only suitable for occasions with low detection frequency requirements, such as spot inspection and the like, and can seriously affect the production efficiency in the occasions with high detection frequency.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a quick fixing measuring rod tool for measuring the span rod distance.

In order to achieve the purpose, the technical solution of the invention is as follows: a quick fixed measuring rod tool for measuring a rod span comprises a fixed sleeve, a shaft sleeve, an even number of measuring rods, wedge blocks, push rods, self-tightening spiral springs A and more than two self-tightening spiral springs B, wherein the number of the wedge blocks is the same as that of the measuring rods; the fixed sleeve is provided with an internal spline matched with the external spline of the shaft lever; the shaft sleeve is slidably arranged at one end of the fixed sleeve and is fixed on the fixed sleeve by a detachable fixing piece; axial limiting through grooves which are assembled with each measuring rod in a clearance mode are arranged between the fixed sleeve and the shaft sleeve in a pairwise symmetry mode, and radial limiting holes communicated with the limiting through grooves are formed in the inner end, in contact with the shaft sleeve, of the end of the fixed sleeve; each measuring rod penetrates through the limiting through groove and is limited by a limiting stop block which is positioned in the limiting hole and fixed on the limiting through groove; the diameter of the front end part of the shaft sleeve is reduced, and a space for relative movement with the limit stop block is reserved; radial mounting holes which are in sliding fit with the wedge blocks are respectively formed in the positions of the shaft sleeve corresponding to the measuring rods; the shaft sleeve is provided with an axial reducing hole with a large front end diameter, the push rod with a handheld position at the rear end is slidably arranged in the axial reducing hole of the shaft sleeve, the diameter of the front end of the push rod is large, and the push rod is limited at the front end of the reducing hole; the middle of the shaft sleeve is conical; each wedge block is arranged in each radial mounting hole of the shaft sleeve, the inner end surface of each wedge block is an inclined cambered surface matched with the conical surface of the push rod, and the inclined cambered surface is slidably abutted on the conical surface of the shaft sleeve; the excircle of the same position of the outer end surface of each wedge block and the shaft sleeve is provided with a circle of groove A matched with the self-tightening spiral spring A, the groove A and the shaft sleeve have the same central shaft, the self-tightening spiral spring A is sleeved on each wedge block and the shaft sleeve, and the self-tightening spiral spring A is assembled in the groove A in a clearance way; the other end of the fixed sleeve is provided with a shaft lever, the other end is provided with a shaft lever shaft shoulder gear, the wall of the other part is thin, the thin wall is provided with grooves B which have the same number as the self-tightening spiral springs B and are matched with the shaft sleeve and have the same central shaft, the thin wall is provided with a measuring window at the position with a measuring rod, and the self-tightening spiral springs B are sleeved on the thin wall and are pressed on the measuring rod respectively and are assembled in the grooves B.

Further preferably, the fixing member for detachably fixing the shaft sleeve to the fixing sleeve is a jackscrew, and the shaft sleeve is fixed by jacking the jackscrew fixed in a radial hole of the fixing sleeve. Simple structure and convenient disassembly.

Further preferably, the limit stopper fixed on the measuring rod is a sleeve ring which is in interference fit with the measuring rod. The installation is simple, the implementation is easy, and the measuring rod only needs to be threaded in the axial limiting through groove and is rigidly threaded in the lantern ring.

Further preferably, the shaft lever shoulder at the other end of the fixing sleeve is shifted to a position that the inner wall surface of the fixing sleeve at the other end is a conical surface matched with the conical surface of the shaft lever shoulder. The shaft shoulder of the shaft lever is not rigidly propped, so that the probability of damaging the shaft shoulder of the shaft lever is reduced.

When in use, the push rod is pressed by hand to move in the shaft sleeve, so as to drive each wedge block to move outwards in the radial direction, the measuring rods are pushed tightly and move outwards until being contacted with the fixed sleeve, the pressure between the measuring rods overcomes the pressure of the self-tightening spiral spring B and expand outwards to the maximum, at the moment, each measuring rod of the invention is sleeved on the external spline of the shaft rod, the push rod is loosened after the fixed sleeve is contacted with the shaft rod shoulder, each wedge block moves inwards in the radial direction and returns to promote the push rod to move outwards, each measuring rod is tightly attached to the external spline tooth surface of the shaft rod under the pressure of the self-tightening spiral spring B, then the cross rod distance of the external spline of the shaft rod in each direction can be respectively measured by an external micrometer, adjustment is not needed in midway, the measuring time is greatly saved, and the measuring rods do not need to be pressed by hand all the time in the measuring process, so as to realize that the measuring rods are not separated from, the measurement accuracy is high. After the measurement is finished, the push rod is pressed down, all the measuring rods are pushed outwards at the same time, and after the measuring rods are moved out from the shaft rods, the push rod is loosened.

In a word, the measuring rod fixing device can be used for quickly and accurately fixing all the measuring rods on the measured shaft rod at the same time, has high measuring rod fixing reliability, is not separated or warped in the whole measuring process, is simple to operate, saves labor and greatly improves the working efficiency.

Drawings

FIG. 1 is a left side view of the present invention;

FIG. 2 is a cross-sectional view AA in FIG. 1;

fig. 3 is a BB cross-sectional view of fig. 1.

Detailed Description

The invention is further described with reference to specific examples.

As shown in fig. 1, fig. 2 and fig. 3, the present embodiment includes a fixing sleeve 7, a shaft sleeve 10, four (two, six, etc. may also be provided according to measurement requirements) measuring rods 4, four wedge blocks 2, a push rod 1, a self-tightening coil spring A8, and two (3, 4, etc. may also be provided according to requirements) self-tightening coil springs B5. The fixing sleeve 7 has internal splines matching with the external splines of the shaft 6. The shaft sleeve 10 is slidably arranged at one end of the fixed sleeve 7 and is fixed on the fixed sleeve by a detachable fixing piece; preferably, the fixing element for detachably fixing the shaft sleeve 10 on the fixing sleeve 7 is a top thread 9, and the shaft sleeve 10 is fixed by the top thread 9 fixed in a radial hole of the fixing sleeve 7. Two symmetric axial limiting through grooves 11 which are assembled with the four measuring rods 4 in a clearance mode are arranged between the fixed sleeve 7 and the shaft sleeve 10, and radial limiting holes communicated with the limiting through grooves 11 are formed in the inner end, in contact with the shaft sleeve 10, of the end of the fixed sleeve 7. The four measuring rods 4 penetrate through the limiting through grooves 11 respectively and are limited by limiting stop blocks which are positioned in the limiting holes and fixed on the limiting through grooves; preferably, the limit stop fixed on the measuring rod 4 is a sleeve ring 3 in interference fit with the measuring rod 4. The diameter of the front end of the shaft sleeve 10 is reduced, and a space for relative movement with the limit stop is reserved. The positions of the shaft sleeve 10 corresponding to the measuring bars 4 are respectively provided with radial mounting holes which are in sliding fit with the wedge blocks 2. The shaft sleeve 10 is provided with an axial reducing hole 13 with a large front end diameter, the push rod 1 with a holding position at the rear end is slidably mounted in the axial reducing hole 13 of the shaft sleeve 10, and the push rod 1 is large in front end 12 diameter and limited at the front end of the reducing hole 13. The middle of the shaft sleeve 10 is conical. Each wedge block 2 is arranged in each radial mounting hole of the shaft sleeve, the inner end surface is an inclined arc surface matched with the conical surface of the push rod 1, and the inclined arc surface is slidably abutted against the conical surface of the shaft sleeve 10. The outer end face of each wedge block 2 and the excircle of the same position of the shaft sleeve 10 are provided with a circle of grooves A14 matched with the self-tightening spiral springs A8, the grooves A14 and the shaft sleeve 10 are concentric, the self-tightening spiral springs A8 are sleeved on each wedge block 2 and the shaft sleeve 10, and the self-tightening spiral springs A8 are assembled in the grooves A14 in a clearance mode. The other end of the fixed sleeve 7 is provided with the shaft lever 6, the other end is provided with a shaft lever 6 shoulder gear 15 except the end part, the wall of the other part is thin, the thin wall is provided with grooves B16 which have the same number as the self-tightening spiral springs B5 and are matched with the shaft sleeve 10 and have the same central shaft, the thin wall is provided with a measuring window 17 at the position with the measuring rod 4, and the self-tightening spiral springs B5 are respectively sleeved and pressed on the thin wall and each measuring rod 4 and assembled in the grooves B16. Preferably, the shaft shoulder position 15 at the other end of the fixing sleeve 7 is that the inner wall surface of the fixing sleeve 10 at the end is a conical surface matched with the conical surface of the shaft shoulder.

The above-described embodiments are merely preferred and illustrative, and not restrictive, and any modifications, equivalents, improvements, etc., which come within the spirit and scope of the invention are intended to be included therein.