Spacing measuring tool

Abstract

The utility model provides a distance measuring tool. The distance measuring tool comprises a first wedge plate and a second wedge plate, wherein the inclination of the second wedge plate is consistent with that of the first wedge plate; the first wedge plate is of a structure with a wide bottom and a narrow head, a first supporting rod is mounted at the top of the first wedge plate, and a main graduated scale is arranged on the first supporting rod in the longitudinal extending direction of the first wedge plate; the second wedge plate is of a structure with the narrow bottom and the wide head, a second supporting rod is installed on the top of the second wedge plate, and an auxiliary graduated scale is arranged on the second supporting rod in the longitudinal extending direction of the second wedge plate. The distance between adjacent scale marks on the main scale is S1, the distance between adjacent scale marks on the auxiliary scale is S2, and S1 is greater than S2; the distance value between one side of the key groove and the main vertical rib convex key can be obtained by reading the numerical value of the graduated scale, and the operation is convenient and fast; meanwhile, measurement errors caused by shaking and displacement of the wedge plate in the measurement process are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to length measurement technical field especially relates to a distance measuring tool. BACKGROUND

[0002] Rotor yoke is an important part of generator rotor, the inside of yoke usually designs the keyway structure, through the keyway installation yoke key and rotor center body main vertical lobe cooperation assembly, see Figure 7 For pumped storage unit generator motor, rotor yoke is sectional structure, during yoke installation, need to measure and check yoke inner circle keyway and rotor center body main vertical lobe left and right distance whether uniform, so as to measure the quality of yoke and rotor center body cooperation installation, if the distance is uneven, need to adjust again.

[0003] Due to the special structure of rotor center body main vertical lobe, the traditional measuring tool (such as vernier caliper) is not suitable for the measurement of the distance. The current method is to insert a pair of wedge plates with the same slope at the distance, and to change the total thickness of the wedge plates by adjusting the overlap length of the two wedge plates. After the wedge plates are tightly wedged, mark the relative positions of the two wedge plates, then take out the wedge plates from the gap, and measure the total thickness of the wedge plates according to the overlap length of the wedge plates reflected by the previously marked relative positions, which is the actual distance value. This kind of measuring tool has the following disadvantages: 1. The distance measurement reading is not intuitive and the measurement process is relatively complex. After the wedge plates are tightly wedged, the relative positions of the two wedge plates need to be marked, then the wedge plates are taken out from the gap, and the total thickness of the wedge plates is measured according to the overlap length of the wedge plates reflected by the previously marked relative positions. The measurement efficiency is low. 2. There is no limiting structure between the two wedge plates, and the shaking and shifting of the wedge plates during use and measurement will cause certain measurement error, affecting the measurement accuracy. CONTENT OF THE UTILITY MODEL

[0004] To solve the above technical problems, the present application provides a distance measuring tool which does not need to take out the wedge plates from the keyway when measuring the distance, and the left and right distance values of the keyway can be obtained by reading the scale value, which is convenient and fast. At the same time, the measurement error caused by the shaking and shifting of the wedge plates during the measurement process is avoided. In order to realize the above technical features, the purpose of the utility model is achieved as follows:

[0005] A distance measuring tool, comprising a first wedge plate and a second wedge plate with the same slope as the first wedge plate;

[0006] The first wedge plate has a structure with a wide bottom and a narrow head, a first support rod is installed on the top of the first wedge plate, and a scale main scale is provided on the first support rod along the longitudinal direction of the first wedge plate;

[0007] The second wedge plate is of a structure with a narrow bottom and a wide head, a second supporting rod is installed on the top of the second wedge plate, and a scale sub-ruler is arranged on the second supporting rod in a direction extending along the longitudinal direction of the second wedge plate;

[0008] The interval between adjacent scale lines on the scale main ruler is S1, the interval between adjacent scale lines on the scale sub-ruler is S2, and the interval S1 between adjacent scale lines on the scale main ruler is greater than the interval S2 between adjacent scale lines on the scale sub-ruler.

[0009] The first wedge plate is provided with a sliding groove on the inclined surface, and the second wedge plate is provided with a convex platform matched with the sliding groove; or the first wedge plate is provided with a convex platform on the inclined surface, and the second wedge plate is provided with a sliding groove matched with the convex platform.

[0010] The sliding groove is a dovetail groove, and the convex platform is a dovetail.

[0011] The top end of the first supporting rod and the second supporting rod is provided with a handle.

[0012] The first supporting rod and the second supporting rod are connected with the handle by welding.

[0013] The first wedge plate and the second wedge plate are made of stainless steel.

[0014] The interval S1 between adjacent scale lines on the scale main ruler is 0.02mm greater than the interval S2 between adjacent scale lines on the scale sub-ruler.

[0015] The utility model has the following beneficial effects:

[0016] 1. The tool does not need to take out the wedge plate from the key groove when measuring the interval, and the interval value between the key groove side and the main vertical bar key can be obtained by reading the scale value, which is convenient and fast, and the measurement error caused by the shaking and displacement of the wedge plate in the measurement process is avoided.

[0017] 2. The first wedge plate and the second wedge plate are guided and positioned when moving relative to each other, so that the wedge plate is prevented from being inclined. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model will be further described in connection with the drawings and examples.

[0019] Figure 1 A structure schematic view in an initial state of a distance measuring tool provided by the utility model embodiment;

[0020] Figure 2 A structure schematic view in an initial state of a distance measuring tool provided by the utility model embodiment; Figure 1 A partial enlarged view of the P in the middle;

[0021] Figure 3 A schematic diagram of the connection structure of the first wedge plate provided in an embodiment of this utility model;

[0022] Figure 4 A schematic diagram of the connection structure of the second wedge plate provided in an embodiment of this utility model;

[0023] Figure 5 A schematic diagram of the working structure of a spacing measuring tool provided in this embodiment of the present invention;

[0024] Figure 6 Provided for the embodiments of this utility model Figure 5 Enlarged view of a portion of the Q region;

[0025] Figure 7 This is a schematic diagram of the installation structure of the main vertical rib protruding key and the inner circular side keyway of the rotor magnetic yoke in the background art involved in this utility model.

[0026] In the figure: First wedge plate 1, Second wedge plate 2, First support rod 3, Second support rod 4, Main scale of the scale 5, Secondary scale of the scale 6, Handle 7, Slide groove 8, Boss 9, Main vertical rib key 10, Keyway 11, Main vertical rib of the rotor center body 12, Rotor magnetic yoke 13;

[0027] 'a' represents the inclination angle of the inclined surfaces of the first and second wedges.

[0028] A0 is the distance between the right-angled side of the first wedge and the right-angled side of the second wedge when the bottoms of the first wedge and the second wedge are aligned;

[0029] A1 is the distance between the right-angled side of the first wedge plate and the right-angled side of the second wedge plate when the bottoms of the first wedge plate and the second wedge plate are aligned in the working state, that is, the distance between one side of the keyway and the protruding key of the main vertical rib. Detailed Implementation

[0030] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0031] To achieve the above-mentioned technical features, the purpose of this utility model is as follows:

[0032] See appendix Figures 1-6A kind of distance measuring tool, including first wedge board 1 and the second wedge board 2 consistent with the slope of first wedge board 1;The first wedge board 1 is the structure of bottom wide, head narrow, first support rod 3 is installed on the top of first wedge board 1, scale main ruler 5 is provided on the first support rod 1 along the direction of the longitudinal extension of first wedge board 1;Second wedge board 2 is the structure of bottom narrow, head wide, second support rod 4 is installed on the top of second wedge board 2, scale sub ruler 6 is provided on the second support rod 4 along the direction of the longitudinal extension of second wedge board 2.The distance between adjacent scale lines on scale main ruler 5 is S1, the distance between adjacent scale lines on scale sub ruler 6 is S2, and S1 is greater than S2;The inclination angle a of first wedge board 1 and second wedge board 2, in initial state, first wedge board 1 and second wedge board 2 bottom alignment, the zero scale line on scale main ruler 5 and the zero scale line on scale sub ruler 6 are aligned, see Figure 1 、 Figure 2 , at this time, the distance between the side right angle edge of first wedge board 1 and the side right angle edge of second wedge board 2 is A0;When using, first wedge board 1 is inserted into the keyway to be measured first, then second wedge board 2 is inserted and wedged, see Figure 5 , at this time, the Mth scale line on scale main ruler 5 and the Nth scale line on scale sub ruler 6 are aligned, see Figure 5 、 Figure 6 , the distance between the side right angle edge of first wedge board 1 and the side right angle edge of second wedge board 2 is A1 (i.e. the distance between the keyway side and the main vertical bar key) :

[0033] A1=A0-(M·S1+N·(S1-S2))·tan a;

[0034] Relative to the measurement method in the prior art, the tool in the application does not need to take out the wedge board from the keyway when measuring the distance, and the distance between the keyway side and the main vertical bar key can be obtained by reading the scale value, which is convenient and fast;At the same time, the measurement error caused by the shaking and displacement of the wedge board in the measurement process is avoided.

[0035] As an embodiment, in the embodiment, the first wedge board 1 is provided with a sliding groove 8 on the inclined surface, and the second wedge board 2 is provided with a boss 9 matched with the sliding groove 8, so that the first wedge board 1 and the second wedge board 2 constitute a guide positioning when moving relatively, thereby avoiding the deflection of the wedge board.

[0036] As an embodiment, in the embodiment, the first wedge board 1 is provided with a boss 9 on the inclined surface, and the second wedge board 2 is provided with a sliding groove 8 matched with the boss 9, so that the first wedge board 1 and the second wedge board 2 constitute a guide positioning when moving relatively, thereby avoiding the deflection of the wedge board.

[0037] Further, the sliding groove 8 is a dovetail groove, and the boss 9 is a dovetail, so that the first wedge plate 1 and the second wedge plate 2 are better guided and positioned when moving relative to each other.

[0038] As an implementation form, in the embodiment, the top end of the first support rod 3 and the second support rod 4 is provided with a handle 7, so as to facilitate operation.

[0039] As an implementation form, in the embodiment, the first support rod 3 and the second support rod 4 are connected with the handle 7 by welding.

[0040] As an implementation form, in the embodiment, the first wedge plate 1 and the second wedge plate 2 are made of stainless steel.

[0041] As an implementation form, in the embodiment, the distance between adjacent scale lines on the main scale is S1, which is 0.02 mm larger than the distance S2 between adjacent scale lines on the auxiliary scale, that is, the measurement accuracy of the tool is 0.02 mm.

Claims

1. A distance measuring tool characterized by: The first wedge plate and the second wedge plate are consistent with the slope of the first wedge plate; The first wedge plate is wide at the bottom and narrow at the top, and a first support rod is installed on the top of the first wedge plate, and a main scale is arranged on the first support rod along the longitudinal direction of the first wedge plate; The second wedge plate is narrow at the bottom and wide at the top, and a second support rod is installed on the top of the second wedge plate, and a secondary scale is arranged on the second support rod along the longitudinal direction of the second wedge plate; The interval between adjacent scale lines on the main scale is S1, the interval between adjacent scale lines on the secondary scale is S2, and the interval between adjacent scale lines on the main scale is S1 is greater than the interval between adjacent scale lines on the secondary scale S2.

2. A distance measuring tool according to claim 1, characterised in that: The first wedge plate is provided with a sliding groove on the slope, and the second wedge plate is provided with a convex on the slope; or the first wedge plate is provided with a convex on the slope, and the second wedge plate is provided with a sliding groove matched with the convex.

3. A distance measuring tool according to claim 2, characterised in that: The sliding groove is a dovetail groove, and the convex is a dovetail.

4. The distance measuring tool of claim 1, wherein: The top of the first support rod and the second support rod is provided with a handle.

5. A distance measuring tool according to claim 4, characterised in that: The first support rod and the second support rod are connected with the handle by welding.

6. The distance measuring tool of claim 1, wherein: The first wedge plate and the second wedge plate are made of stainless steel.

7. The distance measuring tool of claim 1, wherein: The interval between adjacent scale lines on the main scale S1 is 0.02mm larger than the interval between adjacent scale lines on the secondary scale S2.

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