CN219178465U - Straightness measuring device - Google Patents

Abstract

The utility model belongs to the technical field of measuring equipment, and discloses a straightness measuring device. The device can detect the straightness of the rotating shaft and comprises a base, a sliding rail, a first roller bearing group, a second roller bearing group, a guide shaft, a linear bearing and a dial indicator; the sliding rail is fixed on the base, and a first sliding support piece and a second sliding support piece are arranged on the sliding rail in a sliding manner; the first roller bearing group is fixed on the first sliding support; the second roller bearing group is fixed on the second sliding support piece; the two ends of the rotating shaft can respectively abut against the first roller bearing group and the second roller bearing group; the guide shaft is arranged on the base along the first shaft direction; the linear bearing is sleeved on the guide shaft; the dial indicator is fixed on the linear bearing; the dial indicator is used for measuring the straightness of the point to be measured of the rotating shaft; the first axis direction is the extending direction of the sliding rail. The utility model can reduce the measuring difficulty, has strong measuring adaptability to the rotating shaft parts and high measuring efficiency, and can meet the straightness measurement of the rotating shaft with the length close to 1 m.

Description

Straightness measuring device

Technical Field

The utility model relates to the technical field of measuring equipment, in particular to a straightness measuring device.

Background

A complex structural member-a rotating shaft is arranged in the frame-type circuit breaker, the straightness of the rotating shaft directly influences the opening and closing performance and breaking capacity of a circuit breaker product, and the frame-type circuit breaker has great significance on the function of the product.

As shown in fig. 1 and 2, the rotary shaft part in the circuit breaker product is a rotary shaft part, wherein the rotary shaft part comprises a rotary shaft 10 and cantilevers 20 sleeved on the rotary shaft 10, the rotary shaft part temporarily fixes a plurality of cantilevers 20 at preset positions of the rotary shaft 10 according to the angle requirement of a drawing sheet by utilizing argon arc welding on the rotary shaft 10, then two sides of the joint of the rotary shaft 10 and the cantilevers 20 are filled with soldering paste, and then the joint of the cantilevers 20 and the rotary shaft 10 is completed through a braze welding process in a furnace. The rotation shaft 10 is affected by the high temperature of brazing in the furnace, and complex internal stress and external stress (affected by self gravity) generated inside the rotation shaft 10 are subjected to certain random deformation, so that the deformation amount needs to be controlled by detecting the straightness of the rotation shaft 10 before and after welding.

At present, the existing detection mode comprises manual detection and high-precision equipment detection, wherein the manual detection needs to utilize a detection tool V-shaped block, the side wall of the rotating shaft 10 is abutted against the inner wall of a V-shaped groove of the V-shaped block, and straightness measurement is carried out on a preset measurement point position of the rotating shaft 10 by utilizing a dial indicator; the high-precision equipment detection is realized by fixing the rotating shaft 10, writing a corresponding program according to the structure of the corresponding rotating shaft 10, and manufacturing a specific rotating shaft jig to measure the straightness. Both the above two detection modes have certain technical defects for detecting the rotating shaft 10, wherein in the manual detection, the operation of raising the dial indicator is required to be frequently executed in the process of selecting a plurality of measuring points for the rotating shaft 10 under the influence of the cantilever 20, and the operation requirement for workers is high and the operation efficiency is low; the high-precision equipment detection needs to write various corresponding programs according to different structures of the rotating shaft 10, for a plurality of series of circuit breakers, the rotating shafts 10 with various structures and sizes need to write different programs, the programming quantity is numerous and complicated, the equipment operation is complex, in the actual production process, the detecting equipment cannot meet the measurement requirement for the rotating shaft with the length close to 1m, and the adaptability is relatively low.

Disclosure of Invention

The utility model aims to provide a straightness measuring device which is simple in measuring operation, strong in measuring adaptability to rotating shaft parts with different structures and high in measuring efficiency.

To achieve the purpose, the utility model adopts the following technical scheme:

straightness measuring device for detect the straightness accuracy of pivot, include:

a base;

the sliding rail is fixed on the base, and a first sliding support piece and a second sliding support piece are arranged on the sliding rail in a sliding manner;

a first roller bearing set secured to the first sliding support;

a second roller bearing set secured to the second sliding support; the two ends of the rotating shaft can respectively lean against the first roller bearing group and the second roller bearing group;

the guide shaft is arranged on the base along a first shaft direction, and the first shaft direction is the extending direction of the sliding rail;

the linear bearing is sleeved on the guide shaft;

the dial indicator is fixed on the linear bearing and is used for measuring the straightness of the point to be measured of the rotating shaft.

As an alternative scheme of straightness measuring device, be equipped with a plurality of fixing bases on the base, a plurality of the fixing bases is followed the first axial direction is arranged, the mounting hole has been seted up on the fixing base, the guiding axle passes in proper order the mounting hole just with the fixing base is connected.

As an alternative of the straightness measuring device, the number of the guide shafts is at least two, and the number of the mounting holes on each fixing seat is matched with the number of the guide shafts.

As an alternative of the straightness measuring device, the first roller bearing group and the second roller bearing group each include two roller bearings, the two roller bearings are arranged at the same height side by side, and when two ends of the rotating shaft are abutted against the first roller bearing group and the second roller bearing group, the outer wall of the rotating shaft is tangent to the outer ring of the roller bearings.

As an alternative of the straightness measuring device, the first sliding support piece and the second sliding support piece respectively comprise a sliding block and a locking assembly, the sliding block is in sliding connection with the sliding rail, the first roller bearing group and the second roller bearing group are respectively arranged on the corresponding sliding blocks, and the locking assembly can enable the sliding blocks to be locked on the sliding rail.

As an alternative of the straightness measuring device, the first sliding support piece and the second sliding support piece further comprise an L-shaped connecting seat, one end of the L-shaped connecting seat is connected with the first roller bearing group or the second roller bearing group, and the other end of the L-shaped connecting seat is in threaded connection with the sliding block.

As an alternative scheme of straightness measuring device, locking subassembly include locking handle and with the ejector pin that one end of locking handle is connected, the other end of ejector pin with the slider spiro union just can pass the slider and butt in the slide rail.

As an alternative scheme of straightness measuring device, be equipped with the constant head tank on the base, the bottom surface joint of slide rail in the constant head tank.

As an alternative to the straightness measuring device, the base is distributed in a plurality along the first axis direction, and the height of the base is adjustable.

As an alternative scheme of the straightness measuring device, the dial indicator is a universal magnetic dial indicator.

The beneficial effects are that:

in the utility model, the support is provided for the whole device through the base, the first sliding support piece can support the first roller bearing group, and the second sliding support piece can support the second roller bearing group; the two ends of the rotating shaft are supported by the first roller bearing group and the second roller bearing group, so that the rotating shaft is ensured to have stable placing positions; the first sliding support piece and the second sliding support piece can slide along the first axial direction on the guide rail, and the device can adapt to straightness detection of rotating shafts with different lengths and different diameters by adjusting the distance between the first sliding support piece and the second sliding support piece, so that the adaptability of the device is improved; in addition, the linear bearing sleeve is arranged on the guide shaft, meanwhile, the dial indicator is fixed on the linear bearing and moves on the guide shaft through the linear bearing, so that the position of the dial indicator in the first axial direction can be conveniently adjusted, straightness detection of the dial indicator on different to-be-detected points of the rotating shaft is facilitated, adjustment is convenient, measurement difficulty is low, and measurement efficiency is high.

Drawings

FIG. 1 is a front view of a prior art spindle unit;

FIG. 2 is an isometric view of a prior art spindle assembly;

FIG. 3 is an isometric view of a straightness measurement device provided by an embodiment of the present utility model;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is a schematic diagram of a structure for detecting a rotating shaft by using a straightness measuring device before brazing according to an embodiment of the present utility model;

FIG. 6 is a schematic diagram of a structure for detecting a rotating shaft by using a straightness measuring device after brazing according to an embodiment of the present utility model;

fig. 7 is a schematic structural diagram of a shaft and roller bearing according to an embodiment of the present utility model.

In the figure:

10. a rotating shaft; 20. a cantilever;

100. a base; 110. a fixing seat; 111. a mounting hole; 120. a positioning groove;

200. a slide rail;

300. a first roller bearing set; 310. a roller bearing;

400. a first sliding support; 410. a slide block; 420. a locking assembly; 421. a locking handle; 430. a connecting seat;

500. a second roller bearing set;

600. a second sliding support;

700. a guide shaft;

800. a linear bearing;

900. and (5) a dial indicator.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Referring to fig. 3 and 4, the present embodiment relates to a straightness measuring apparatus (hereinafter referred to as "apparatus") for detecting straightness of a rotating shaft 10, which includes a base 100, a slide rail 200, a first roller bearing set 300, a first sliding support 400, a second roller bearing set 500, a second sliding support 600, a guide shaft 700, a linear bearing 800, and a dial indicator 900; the sliding rail 200 is fixed on the base 100, and a first sliding support 400 and a second sliding support 600 are slidably arranged on the sliding rail 200; the first roller bearing set 300 is fixed on the first sliding support 400; the second roller bearing set 500 is fixed on the second sliding support 600; the two ends of the rotating shaft 10 can respectively abut against the first roller bearing group 300 and the second roller bearing group 500; the guide shaft 700 is installed on the base 100 in the first shaft direction; the linear bearing 800 is sleeved on the guide shaft 700; the dial indicator 900 is fixed to the linear bearing 800; the dial indicator 900 is used for measuring the straightness of the point to be measured of the rotating shaft 10; the first axis direction is the extending direction of the slide rail 200, and in this embodiment, referring to fig. 3, the X direction is taken as the first axis direction.

In this embodiment, the base 100 provides support for the whole device, the first sliding support 400 is used for supporting the first roller bearing set 300, the second sliding support 600 is used for supporting the second roller bearing set 500, and the two ends of the rotating shaft 10 are supported by the first roller bearing set 300 and the second roller bearing set 500, so that the rotating shaft 10 is ensured to have a stable placement position; since the first sliding support 400 and the second sliding support 600 slide on the guide rail 200 along the first axis direction, the device can adapt to straightness detection of rotating shafts 10 with different lengths and different diameters by adjusting the distance between the first sliding support 400 and the second sliding support 600, and the adaptability of the device is improved; in addition, the linear bearing 800 is sleeved on the guide shaft 700, meanwhile, the dial indicator 900 is fixed on the linear bearing 800, the position of the dial indicator 900 in the first axis direction can be conveniently adjusted by moving the linear bearing 800 on the guide shaft 700, straightness detection of the dial indicator 900 on different points to be detected of the rotating shaft 10 is also facilitated, adjustment is convenient, measurement difficulty is low, and measurement efficiency is high.

For example, for the straightness of the rotating shaft 10 before and after brazing of the rotating shaft component in the circuit breaker product, referring to fig. 5, in the straightness detection process of the rotating shaft 10 before brazing, the rotating shaft 10 without the cantilever 20 is firstly placed on the device, the length of the rotating shaft 10 is adapted by adjusting the relative distance between the first sliding support piece 400 and the second sliding support piece 600, according to the design drawing, the point to be tested of the rotating shaft 10 is selected, the dial indicator 900 is adjusted to be near the point to be tested, the probe of the dial indicator 900 contacts the outer wall of the rotating shaft 10, the rotating shaft 10 rotates by 360 degrees, the data of the point to be tested of the rotating shaft 10 is collected, and the straightness of the rotating shaft 10 before brazing is calculated according to the data; referring to fig. 6, in the process of detecting the straightness of the shaft 10 after brazing, a plurality of cantilevers 20 are welded on the shaft 10, according to the functional requirement of the circuit breaker, a plurality of cantilevers 20 are configured on the same shaft 10, the dial indicator 900 is continuously adjusted to reach the accessory of the point to be detected, in the adjusting process, the cantilevers 20 need to be avoided, the probe of the dial indicator 900 touches the outer wall of the shaft 10, the shaft 10 is rotated again, data of the point to be detected are collected, and the straightness of the shaft 10 after brazing is calculated according to the data; through the two straightness detection before and after brazing, the influence condition of the brazing temperature on the deformation of the rotating shaft 10 can be mastered rapidly, the welding process parameters can be adjusted conveniently by operators, the deformation of the rotating shaft 10 is controlled, and the yield of products is improved.

Optionally, the base 100 is provided with a plurality of fixing seats 110, the plurality of fixing seats 110 are arranged along the first axis direction, the fixing seats 110 are provided with mounting holes 111, and the guide shaft 700 sequentially passes through the mounting holes 111 and is connected with the fixing seats 110. In this embodiment, the base 100 is a bar-shaped block, the bottom of the guide rail 200 is provided with a plurality of bases 100 along the first axis direction, the bases 100 can be clamped or screwed with the bottom of the guide rail 200, a plurality of mounting grooves are further provided on the bases 100, and the fixing seats 110 are fixed in the mounting grooves; each base 100 is matched with a fixed seat 110; the fixing base 110 is further provided with a mounting hole 111, the guide shaft 700 sequentially passes through the mounting hole 111, and the fixing bases 110 provide stable fixing support for the guide shaft 700, so that the guide effect of the guide shaft 700 is stable when the dial indicator 900 is subjected to position adjustment.

Alternatively, the number of the guide shafts 700 is at least two, and the number of the mounting holes 111 on each fixing base 110 is matched with the number of the guide shafts 700. In the present embodiment, the number of guide shafts 700 is set to two. By arranging at least two guide shafts 700, on one hand, the linear bearing 800 can be circumferentially limited, and on the other hand, the supporting stability can be improved by increasing the number of the guide shafts 700.

Referring to fig. 7, alternatively, the first roller bearing set 300 and the second roller bearing set 500 each include two roller bearings 310, the two roller bearings 310 are disposed side by side at the same height, and when two ends of the rotating shaft 10 abut against the first roller bearing set 300 and the second roller bearing set 500, the outer wall of the rotating shaft 10 is tangent to the outer ring of the roller bearings 310. By adopting the roller bearing 310, the centering of the rotating shaft 10 can be improved, and the centering of the rotating shaft 10 can be realized for rotating shafts 10 with different diameters; and simultaneously, an operator can conveniently rotate the rotating shaft 10 on the roller bearing 310, so that the resistance is reduced. In this embodiment, since the cylindricity of the outer wall of the roller bearing 310 has a large influence on the measurement of the rotational straightness of the rotating shaft 10, the diameter of the outer wall of the roller bearing 310 needs to be controlled to control the forming process, so that the cylindricity of the outer wall reaches a qualified range.

Optionally, the first sliding support 400 and the second sliding support 600 respectively include a slider 410 and a locking assembly 420, the slider 410 is slidably connected with the sliding rail 200, the first roller bearing set 300 and the second roller bearing set 500 are respectively disposed on the corresponding slider 410, and the locking assembly 420 enables the slider 410 to be locked on the sliding rail 200. In this embodiment, a U-shaped groove along the first axis direction is formed on the sliding rail 200, semicircular grooves are formed on inner walls of two sides of the U-shaped groove, a sliding column is embedded in the semicircular grooves, semicircular grooves are also formed on two sides of the bottom of the sliding block 410, the other half of the sliding column is embedded in the semicircular grooves of the sliding block 410, the sliding block 410 can slide along the first axis direction on the sliding column, the position adjustment of the first sliding support 400 and the second sliding support 600 is achieved, and in addition, after the first sliding support 400 and the second sliding support 600 are adjusted to reach a preset position through the locking component 420, locking of the sliding block 410 is achieved.

Further, the locking assembly 420 includes a locking handle 421 and a push rod connected to one end of the locking handle 421, and the other end of the push rod is screwed with the slider 410 and can pass through the slider 410 and abut against the sliding rail 200. The operator can drive the ejector rod to extend forwards by rotating the locking handle 421 and lean against the sliding rail 200, the ejector rod can be a threaded rod, and the front end of the threaded rod can lean against or be separated from the sliding rail 200 by screwing in and screwing out the threaded rod, so that the relative locking of the sliding block 410 and the sliding rail 200 is completed or released.

Optionally, the first sliding support 400 and the second sliding support 600 further include an L-shaped connecting seat 430, and with continued reference to fig. 3 and 4, one end of the L-shaped connecting seat 430 is connected to the first roller bearing set 300 or the second roller bearing set 500, and the other end is screwed to the slider 410, and through the L-shaped connecting seat 430, the first sliding support 400 and the second sliding support 600 can be conveniently adjusted to a proper height, so that the comfort level of the measurement operation of the operator is improved.

Optionally, the base 100 is provided with a positioning slot 120, and the bottom surface of the sliding rail 200 is clamped in the positioning slot 120. The positioning groove 120 is used for positioning the sliding rail 200 relative to the base 100.

Alternatively, the base 100 is distributed in plurality along the first axis direction, and the height of the base 100 is adjustable. When the device is placed on a measuring table, the flatness problem of the measuring table can affect the horizontal placement degree of the whole device, and the device can be always kept horizontal by adjusting the height of the individual base 100; in addition, the device can be conveniently adjusted to a comfortable operation height suitable for an operator by adjusting the height of the base 100.

Alternatively, dial gauge 900 may be, for example, a universal magnetic dial gauge. When the universal magnetic dial indicator is used, the azimuth of the probe can be conveniently adjusted through the universal support arm, the gauge outfit is connected with the micro-motion device, the gauge outfit can be kept to be finely adjusted again when being adjusted to be near the position to be measured, after the accurate position to be measured is reached, the universal support arm is fixed, the micro-motion device is locked, the probe is fixed at the point to be measured of the rotating shaft 10, the rotating shaft 10 rotates for one circle, the probe moves for one circle in the circumferential direction of the rotating shaft 10, and the straightness of the rotating shaft 10 at the point to be measured can be obtained from the gauge outfit. If the point to be measured needs to be selected again, the universal support arm and the micro-motion device can be adjusted again, the linear bearing 800 can be moved along the first axis direction on the guide shaft 700, when the new point to be measured is reached, the universal support arm is fixed, the micro-motion device is locked, the rotating shaft is rotated for 10 circles repeatedly, and the straightness of the re-selected point to be measured can be obtained. Further, in one possible implementation, the straightness measurement result of the rotation shaft 10 may be two times larger. In order to further improve the measurement accuracy of the straightness of the rotating shaft 10, more measurement points can be selected, and the straightness of the rotating shaft 10 is obtained through comprehensive comparison.

In this embodiment, the universal magnetic force dial indicator is adopted to conveniently adjust the direction of the probe on one hand, and also can conveniently adapt to the cantilever 20 soldered on the rotating shaft 10 in the process of moving the universal magnetic force dial indicator along the first axis direction when different points to be tested are switched on the other hand.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. Straightness measuring device for detect the straightness accuracy of pivot (10), its characterized in that includes:

a base (100);

a sliding rail (200) fixed on the base (100), wherein a first sliding support (400) and a second sliding support (600) are arranged on the sliding rail (200) in a sliding manner;

a first roller bearing set (300) fixed to the first sliding support (400);

a second roller bearing set (500) fixed to the second sliding support (600); two ends of the rotating shaft (10) can respectively lean against the first roller bearing group (300) and the second roller bearing group (500);

a guide shaft (700) mounted on the base (100) along a first axis direction, the first axis direction being an extending direction of the slide rail (200);

a linear bearing (800) sleeved on the guide shaft (700);

the dial indicator (900) is fixed on the linear bearing (800), and the dial indicator (900) is used for measuring the straightness of the point to be measured of the rotating shaft (10).

2. The straightness measurement device according to claim 1, wherein the base (100) is provided with a plurality of fixing seats (110), the plurality of fixing seats (110) are arranged along the first axis direction, the fixing seats (110) are provided with mounting holes (111), and the guide shafts (700) sequentially penetrate through the mounting holes (111) and are connected with the fixing seats (110).

3. The straightness measurement device according to claim 2, wherein the number of guide shafts (700) is at least two, and the number of mounting holes (111) on each fixing base (110) matches the number of guide shafts (700).

4. The straightness measurement device according to claim 1, characterized in that the first roller bearing set (300) and the second roller bearing set (500) each comprise two roller bearings (310), the two roller bearings (310) being arranged side by side at the same height, the outer wall of the rotating shaft (10) being tangential to the outer ring of the roller bearings (310) when both ends of the rotating shaft (10) abut against the first roller bearing set (300) and the second roller bearing set (500).

5. The straightness measurement apparatus as set forth in claim 1, wherein the first sliding support (400) and the second sliding support (600) each include a slider (410) and a locking assembly (420), the slider (410) being slidably connected to the slide rail (200), the first roller bearing set (300) and the second roller bearing set (500) being disposed on the corresponding slider (410), respectively, the locking assembly (420) enabling the slider (410) to be locked to the slide rail (200).

6. The straightness measurement apparatus as set forth in claim 5, wherein the first and second sliding supports (400, 600) further comprise an L-shaped connection seat (430), one end of the L-shaped connection seat (430) is connected to the first roller bearing set (300) or the second roller bearing set (500), and the other end is screw-connected to the slider (410).

7. The straightness measurement apparatus as claimed in claim 5, wherein the locking assembly (420) includes a locking handle (421) and a push rod connected to one end of the locking handle (421), and the other end of the push rod is screwed with the slider (410) and can pass through the slider (410) and is abutted against the slide rail (200).

8. The straightness measurement device according to claim 1, wherein the base (100) is provided with a positioning groove (120), and the bottom surface of the sliding rail (200) is clamped in the positioning groove (120).

9. The straightness measurement apparatus according to claim 8, wherein the base (100) is distributed in plurality along the first axis direction, and the height of the base (100) is adjustable.

10. The straightness measurement device according to any one of claims 1-9, wherein the dial gauge (900) is a universal magnetic dial gauge.

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