Variable distance guide bushing

Abstract

The present invention relates to the field of measurement technology, and specifically to a variable distance fixed distance guide sleeve, comprising a guide sleeve body, a plurality of sliders and a plurality of gaskets, wherein the sliders are slidably connected with the guide sleeve body along the axial direction of the guide sleeve body, the sliders are arranged at intervals in the circumferential direction of the guide sleeve body, the gaskets are connected with the bottom ends of the sliders, and a plurality of gaskets are sequentially spliced ​​into a gasket ring; the variable distance fixed distance sleeve provides a universal function of a fixed distance sleeve within a certain length size range under the same inner hole size. It can be processed in advance, reduce the waiting time for measuring the hole of the parts, reduce the length size types of the fixed distance sleeve, and is simple to classify and convenient to manage.

Description

Technical Field

[0001] The invention relates to the field of measurement technology, and in particular to a variable distance fixed distance guide sleeve. Background Art

[0002] When measuring the aperture size during internal hole processing, radial holes, slot holes, etc. should be avoided, and the aperture size should be accurately measured. When designing the existing distance sleeve, radial holes, slots, etc. are avoided by calculation according to the part design drawing, and the length dimensions of the distance sleeve at different axial positions are given. The distance sleeve is integrated during processing, and the distance length of the distance sleeve step cannot be changed. The distance sleeve cannot be universal, and a large number of distance sleeves of different sizes need to be processed in the part production project. Summary of the invention

[0003] The purpose of the present invention is to provide a variable distance fixed distance guide sleeve to solve the problem that the length of the fixed distance guide sleeve in the prior art cannot be changed.

[0004] The technical solution of the present invention to achieve the above-mentioned purpose is:

[0005] A variable distance fixed distance guide sleeve, characterized in that it comprises a guide sleeve body and a plurality of sliders, wherein the guide sleeve body is provided with concentric through holes, the sliders are arranged at intervals along the axial direction of the guide sleeve body, and the sliders are slidably connected to the guide sleeve body along the axial direction of the guide sleeve body.

[0006] The guide sleeve body is provided with a plurality of standard scales corresponding to the sliders one by one. The standard scales are arranged in the same direction as the sliders. When the leading end of the slider is flush with the leading end of the guide sleeve body, the trailing end of the slider is flush with the 0 scale in the standard scale.

[0007] The sliding block is slidably connected to the guide sleeve body through a limiting sliding groove provided on the guide sleeve body, and two ends of the limiting sliding groove pass through corresponding sections of the guide sleeve body.

[0008] The above-mentioned limiting slide groove is a dovetail groove.

[0009] The above-mentioned limiting slide groove is provided with a limiting slot on the end surface close to the center of the guide sleeve body, and the limiting slot is located between the two ends of the limiting slide groove. A limiting block is arranged at the front end of the slider, and the slider is connected with the limiting slot through the limiting block.

[0010] The slider is provided with an adjusting screw, and the adjusting screw is used to fasten the slider and the guide sleeve body.

[0011] The head ends of the above-mentioned sliders are all provided with gaskets, and the gaskets on the same plane form a circular ring structure concentric with the guide sleeve body, and the inner diameter of the circular ring is equal to the inner diameter of the concentric hole of the guide sleeve body.

[0012] The gasket is connected to the head end of the slider via screws.

[0013] The measuring method based on the variable distance fixed distance guide sleeve is characterized by comprising the following steps:

[0014] 1) Prepare a measuring needle and a guide sleeve body that match the inner hole of the part, and adjust the distance that the slider extends out of the guide sleeve body according to the position of the through hole on the side of the part;

[0015] 2) Align the tail end of the guide sleeve with the head end of the part so that the inner hole of the part is coaxial with the through hole on the guide sleeve;

[0016] 3) Extend the measuring needle along the through hole of the guide sleeve body toward the inner hole of the part until the step on the measuring needle contacts the gasket on the slider at the outermost end of the distance guide sleeve, measure the size of the inner hole of the part, and the measurement is completed; then repeat the above method, rotate the measuring needle to start measuring and continue to extend it until the step on the measuring needle contacts the gasket on the second slider of the distance guide; repeat the above method until the step on the measuring needle contacts the gasket on the third slider of the distance guide; repeat the above method, and stop measuring after using all the steps on the distance guide to complete the part hole measurement; obtain the aperture size for standby use; take the second part and repeat the above complete process to obtain the aperture size for standby use.

[0017] The above 1) is specifically: the distance between the center plane of the first row of radial holes on the part and the head end of the part is y, then the distance between the head end of the guide sleeve body and the head end of the guide sleeve body is y1, and the y1≤y, y1=Ld, wherein L is the length between the set vent hole on the side wall of the gauge needle and the gauge needle step, d is the length of the guide sleeve body, and the inner diameter of the part is measured at y1 using a pneumatic measuring instrument;

[0018] The distance between the center plane of the second row of radial holes and the center plane of the first row of radial holes is z, then the length of the second slider extending out of the guide sleeve body is adjusted to c, and the distance between its head end and the head end of the guide sleeve body is z1, wherein z1≤z, z1=Ldc, and the inner diameter of the part is measured at z1 using a pneumatic measuring instrument;

[0019] The distance between the center plane of the second row of radial holes and the center plane of the third row of radial holes on the part is x, then the length of the third slider extending out of the guide sleeve body is adjusted to be f, and the distance between its head end and the head end of the guide sleeve body is x1, wherein x1≤x, x1=Ldf, and the inner diameter of the part is measured at x1 using a pneumatic measuring instrument;

[0020] Repeat the above method until the slider marks the position dimension between the center plane of the last row of radial holes and the bottom of the part.

[0021] Beneficial effects of the present invention:

[0022] 1. The variable distance type distance sleeve provides a universal function of a distance sleeve within a certain length range under the same inner hole size. It can be processed in advance, reducing the waiting time for part hole measurement, reducing the length and size types of the distance sleeve, and is simple to classify and easy to manage.

[0023] 2. By using variable distance sleeves, the number of measuring needles and variable distance sleeves of the same aperture size is greatly reduced compared with the number of special measuring needles and special distance sleeves; the variable distance sleeve can be used in conjunction with the general measuring needle; the variable distance sleeve can be independently processed and stored without being affected by the length of the part, which greatly shortens the waiting time for the part to be measured. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the side view structure of the guide sleeve body according to an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the side view structure of a slider according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of a gasket according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic structural diagram of a slider connection gasket according to an embodiment of the present invention;

[0029] Among them, 1 is a guide sleeve body; 101 is a guide hole; 102 is a limiting slide groove; 103 is a limiting card slot; 2 is a slider; 3 is a gasket; 4 is an adjustment screw; 5 is a screw. DETAILED DESCRIPTION

[0030] See also Figure 2 , Figure 3 , Figure 4 as well as Figure 5 The present invention provides a variable distance fixed distance guide sleeve, comprising a guide sleeve body 1 and a plurality of sliders 2, wherein the guide sleeve body 1 is provided with concentric through holes, the sliders 2 are arranged at intervals along the axial direction of the guide sleeve body 1, and the sliders 2 are slidably connected to the guide sleeve body 1 along the axial direction of the guide sleeve body 1.

[0031] The guide sleeve body 1 is provided with a number of standard scales corresponding to the slider 2, and the standard scales are arranged in the same direction as the slider 2. When the head end of the slider 2 is flush with the head end of the guide sleeve body 1, the tail end of the slider 2 is flush with the 0 scale in the standard scale. The slider 2 is slidably connected to the guide sleeve body 1 through the limit slide groove 102 provided on the guide sleeve body 1, and the two ends of the limit slide groove 102 pass through the corresponding section of the guide sleeve body 1. The limit slide groove 102 is a dovetail groove.

[0032] A limiting card slot 103 is provided on the end surface of the limiting slide groove 102 close to the center of the guide sleeve body 1. The limiting card slot 103 is located between the two ends of the limiting slide groove 102. A gasket 3 is provided at the head end of the slider 2. An adjustment screw 4 is provided on the slider 2, and the adjustment screw 4 is used to fasten the slider 2 to the guide sleeve body 1. A gasket 3 is provided on the head end of the slider 2. Several gaskets 3 on the same plane form a circular ring structure concentric with the guide sleeve body 1, and the inner diameter of the circular ring is equal to the inner diameter of the concentric hole of the guide sleeve body 1. The gasket 3 is connected to the head end of the slider 2 by a screw 5.

[0033] The measuring method based on the above variable distance fixed distance guide sleeve is characterized by comprising the following steps:

[0034] 1) Prepare a measuring needle and a guide sleeve body 1 that match the inner hole of the part respectively, and adjust the distance that the slider 2 extends out of the guide sleeve body 1 according to the position of the through hole on the peripheral side of the part;

[0035] The distance between the center plane of the first row of radial holes on the part and the head end of the part is y, and the distance between the head end of the guide sleeve body 1 and the head end of the guide sleeve body 1 is y1, and y1≤y, y1=Ld, where L is the length between the set side wall air outlet opening of the gauge needle and the gauge needle step, and d is the length of the guide sleeve body 1. The inner diameter of the part is measured at y1 using a pneumatic measuring instrument;

[0036] The distance between the center plane of the second row of radial holes and the center plane of the first row of radial holes is z, and the second slider (2) is adjusted to extend out of the guide sleeve body 1 by a length of c, and the distance between its head end and the head end of the guide sleeve body 1 is z1, wherein z1≤z, z1=Ldc, and the inner diameter of the part is measured at z1 using a pneumatic measuring instrument;

[0037] The distance between the center plane of the second row of radial holes and the center plane of the third row of radial holes on the part is x, then the third slider 2 is adjusted to extend out of the guide sleeve body 1 by a length of f, and the distance between its head end and the head end of the guide sleeve body 1 is x1, wherein x1≤x, x1=Ldf, and the inner diameter of the part is measured at x1 using a pneumatic measuring instrument;

[0038] Repeat the above method until slider 2 marks the position dimension between the center plane of the last row of radial holes and the bottom of the part.

[0039] 2) Align the tail end of the guide sleeve body 1 with the head end of the part so that the inner hole of the part is coaxial with the through hole on the guide sleeve body 1;

[0040] 3) Extend the measuring needle along the through hole of the guide sleeve body 1 toward the inner hole of the part until the step on the measuring needle contacts the gasket 3 on the slider 2 located at the outermost end of the spacing guide sleeve, measure the size of the inner hole of the part, and the measurement is completed; then repeat the above method, rotate the measuring needle to start measuring and continue to extend it until the step on the measuring needle contacts the gasket 3 on the second slider 2 of the spacing guide; repeat the above method until the step on the measuring needle contacts the gasket 3 on the third slider 2 of the spacing guide; repeat the above method, and stop measuring after using all the steps on the spacing guide to complete the part hole measurement; obtain the aperture size for standby use; take the second part and repeat the above complete process to obtain the aperture size for standby use.

[0041] The technical solution provided by the present invention will be described in detail below with reference to the accompanying drawings:

[0042] refer to Figure 1 A variable distance fixed distance guide sleeve comprises a guide sleeve body 1, a slider 2 and a gasket 3. The guide sleeve body 1 is a cylindrical structure, the slider 2 is a strip structure, there are multiple sliders 2, the slider 2 is slidably connected to the guide sleeve body 1, so that the slider 2 can move up and down along the axis direction of the guide sleeve body 1, the gasket 3 is installed at the bottom end of the slider 2, and the gaskets 3 connected to each slider 2 form a circular ring structure, and a standard scale is set on the guide sleeve body 1 for reading the distance.

[0043] Specifically, refer to Figure 2 and Figure 3 The guide sleeve body 1 is a hollow cylindrical structure as a whole, and a guide hole 101 is opened in the middle of the guide sleeve body 1. The guide hole 101 is used to pass the measuring needle, so the guide hole 101 matches the size of the measuring needle; in order to make the guide sleeve body 1 and the slider 2 slidably connected, a limited sliding groove 102 is opened on the guide sleeve body 1, and the limited sliding groove 102 is a through groove, that is, the two ends of the limited sliding groove 102 pass through the corresponding end faces of the guide sleeve body 1. In order to prevent the slider 2 from moving along the radial direction of the guide sleeve body 1 when sliding, the cross-section of the limited card groove 102 is set to a shape combining a rectangle and a trapezoid, and the slider 2 matches the limited sliding groove 102; because the bottom end of the slider 2 is connected to the gasket 3, the slider 2 cannot slide out of the guide sleeve body 1 under the limit of the gasket 3 when sliding upward. Therefore, in order to prevent the slider 2 from sliding out of the limit slot 102 when sliding downward, a limit slot 103 is provided on the end face of the limit slot 102 close to the axis of the guide sleeve body 1. The upper end of the limit slot 103 passes through the upper end face of the guide sleeve body 1, and the lower end of the limit slot 103 does not pass through the lower end face of the guide sleeve body 1. A limit card block matching the limit slot 103 is also provided on the slider 2. When the limit card block moves downward with the slider 2, the lower end face of the limit slot 103 is limited by the limit card block, thereby ensuring that the slider 2 can slide on the guide sleeve body 1 efficiently and stably.

[0044] The structure of the slider 2 matches that of the limiting groove 102. The number of sliders 2 is 2 to 6. This article takes the example of 4 sliders 2 for explanation. The sliders 2 are arranged at equal intervals along the circumference of the guide sleeve body 1. An adjusting screw 4 is arranged on the slider 2. The adjusting screw 4 passes through the slider 2 from the outside of the slider 2 and contacts the limiting groove 202. The adjusting screw is arranged vertically to the slider 2 to fasten the slider 2 to the guide sleeve body 1 to avoid the slider 2 from shifting up and down, so that the measurement is more accurate and the error is smaller. When the adjusting screw 4 limits the slider 2, the vertical distance from the top surface of the adjusting screw 4 to the axis of the guide sleeve body 1 is not greater than the radius of the guide sleeve body 1, that is, when the slider 2 is limited by the adjusting screw 4.

[0045] refer to Figure 4 The pad 3 is connected to the bottom end of the slider 2 through the connecting thread 5, and the middle position of the pad 3 arc is connected to the slider 2. The outer diameter of the pad 3 is larger than the maximum spacing on the short side section of the limiting slide groove 102, and the inner diameter of the pad 3 is smaller than the minimum spacing on the short side section of the slide groove 102, so that the pad 3 can limit the slider 2 and prevent the slider 2 from sliding upward from the guide sleeve body 1; the pad 3 is an arc-shaped structure. When the number of sliders 2 is 4, the round angle of the pad 3 is 90°, and the pads 3 at the bottom ends of the 4 sliders 2 are spliced ​​into a gasket ring. The inner diameter of the gasket ring is the same as the inner diameter of the guide hole 101, and the outer diameter of the gasket ring is the same as the outer diameter of the guide sleeve body 1.

[0046] The standard scale on the guide sleeve body 1 is correspondingly arranged next to the slider 2, and a value point is arranged on the slider 2. In the initial state, when the slider 2 does not slide and the gasket 3 is in contact with the guide sleeve body 1, the value point on the slider 2 is aligned with the 0 scale. When the slider 2 drives the gasket 3 to slide, the value point on the slider 2 moves on the standard scale to read its corresponding value.

[0047] Implementation method: When in use, select a guide sleeve body 1 that matches the inner diameter of the hole to be measured on the part, then slide the slider 2 through the value-taking point reference standard scale to read the corresponding value until the value is the depth of the hole to be measured, at this time, tighten the slider 2 by adjusting the screw 4 to prevent the slider 2 from sliding, and finally extend the spacer ring, the bottom of the slider 2 and the guide sleeve body 1 into the hole to be measured, and prepare to use the amount to measure the hole to be measured.

Claims

1. A measurement method based on a variable distance fixed distance guide sleeve, It is characterized in that The variable distance fixed distance guide sleeve comprises a guide sleeve body (1) and a plurality of sliders (2), the guide sleeve body (1) being provided with concentric through holes, the sliders (2) being arranged at intervals along the axial direction of the guide sleeve body (1), and the sliders (2) being slidably connected to the guide sleeve body (1) along the axial direction of the guide sleeve body (1); The guide sleeve body (1) is provided with a plurality of standard scales corresponding to the sliders (2) one by one, the standard scales and the sliders (2) are arranged in the same direction, and when the front end of the slider (2) is flush with the front end of the guide sleeve body (1), the rear end of the slider (2) is flush with the 0 scale in the standard scale; The slider (2) is provided with an adjustment screw (4), and the adjustment screw (4) is used to fasten the slider (2) and the guide sleeve body (1); A gasket (3) is provided on the head end of each slider (2); a plurality of gaskets (3) on the same plane form a circular ring structure coaxial with the guide sleeve body (1); the inner diameter of the circular ring is equal to the inner diameter of the concentric hole of the guide sleeve body (1); The measuring method comprises the following steps: 1) Prepare a measuring needle and a guide sleeve body (1) that match the inner hole of the part respectively, and adjust the distance that the slider (2) extends out of the guide sleeve body (1) according to the position of the through hole on the peripheral side of the part; 2) Align the rear end of the guide sleeve body (1) with the front end of the component so that the inner hole of the component is coaxial with the through hole on the guide sleeve body (1); 3) Extend the measuring needle along the through hole of the guide sleeve body (1) toward the inner hole of the part until the step on the measuring needle contacts the gasket (3) on the slider (2) at the outermost end of the distance guide sleeve, measure the inner hole size of the part, and complete the measurement; then repeat the above method, rotate the measuring needle to start measuring and continue to extend until the step on the measuring needle contacts the gasket (3) on the second slider (2) of the distance guide sleeve; repeat the above method until the step on the measuring needle contacts the gasket (3) on the third slider (2) of the distance guide sleeve; repeat the above method, stop measuring when all the steps on the distance guide sleeve are used up, and complete the part hole measurement; obtain the hole diameter size for standby use; take the second part and repeat the above complete process to obtain the hole diameter size for standby use.

2. The measuring method based on the variable distance fixed distance guide sleeve according to claim 1, It is characterized in that The sliding block (2) is slidably connected to the guide sleeve body (1) via a limiting sliding groove (102) provided on the guide sleeve body (1), and both ends of the limiting sliding groove (102) pass through corresponding cross sections of the guide sleeve body (1).

3. The measuring method based on the variable distance fixed distance guide sleeve according to claim 2, It is characterized in that The limiting sliding groove (102) is a dovetail groove.

4. The measuring method based on the variable distance fixed distance guide sleeve according to claim 2, It is characterized in that A limiting slot (103) is provided on the end surface of the limiting slide groove (102) close to the center of the guide sleeve body (1), and the limiting slot (103) is located between the two ends of the limiting slide groove (102). A limiting block is provided at the front end of the slider (2), and the slider (2) is connected to the limiting slot (103) through the limiting block.

5. The measuring method based on the variable distance fixed distance guide sleeve according to claim 1, It is characterized in that The gasket (3) is connected to the head end of the slider (2) via a screw (5).

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