Detection tool for detecting position degree of ball head of input rod

Abstract

The utility model provides a detection tool for detecting the position degree of an input rod ball head, relates to the technical field of detection tools, and aims to solve the technical problems of high cost and low efficiency in the measurement of the position degree of the input rod ball head in the prior art. The utility model discloses a testing fixture for detecting the position degree of an input rod ball head, and the testing fixture comprises a pedestal; the online projection image measuring instrument is connected to the base and is used for measuring the size of the input rod; the measuring platform is connected to the online projection image measuring instrument, and a limiting hole is formed in the upper end face of the measuring platform; the upper end of the measuring rotating shaft penetrates through the measuring platform and is located in the limiting hole, the upper end of the measuring rotating shaft is provided with an external thread used for being in threaded connection with the input rod, and the upper end face of the measuring rotating shaft is a plane used for abutting against the top end of the threaded hole of the input rod; the driving part is used for driving the measuring rotating shaft to rotate.

Description

TECHNICAL FIELD

[0001] The utility model relates to a testing fixture technical field, specifically is a kind of testing fixture for detecting input rod ball head position degree. BACKGROUND

[0002] Input rod is used for automobile brake system, it includes a rod body, a ball head and a hexagonal part, hexagonal part is arranged at the bottom end of rod body, ball head is arranged at the top end of rod body, and the bottom end of hexagonal part is also provided with internal thread.

[0003] Input rod ball head and thread are used to connect the key components of brake pedal and braking system, and the position degree size of ball head center compared to the top end end face of thread and thread hole directly affects brake distance and sensitivity, so it is necessary to implement 100% full inspection to input rod before shipment.

[0004] Since the position relationship of the center of ball head and thread in diameter and length two directions needs to be measured, currently only three-dimensional and special tooling measurement can be used, and this method has high cost and low measurement efficiency. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model aims at providing a testing fixture for detecting input rod ball head position degree to solve the technical problems of high cost and low efficiency of input rod ball head position degree measurement in the prior art.

[0006] To solve the above technical problems, the utility model provides a testing fixture for detecting input rod ball head position degree, which comprises:

[0007] A base;

[0008] An online projection image measuring instrument connected to the base for measuring the size of the input rod;

[0009] A measuring platform connected to the online projection image measuring instrument, and a limiting hole is arranged on the upper end face of the measuring platform;

[0010] A measuring rotating shaft rotatably connected to the base, the upper end of the measuring rotating shaft penetrates through the measuring platform and is located in the limiting hole, the upper end of the measuring rotating shaft is provided with an external thread for connecting with the thread of the input rod, and the upper end face of the measuring rotating shaft is a flat surface for abutting with the top end of the thread hole of the input rod;

[0011] A driving member for driving the measuring rotating shaft to rotate.

[0012] The utility model discloses a kind of measuring tools for detecting the position degree of input rod ball head with the following advantages after using the above structure: worker holds input rod and keeps its thread downward state, input rod is placed into to limit hole, measurement rotating shaft is rotated by driving element, so that measurement rotating shaft is threadedly connected with input rod, and the upper end surface of measurement rotating shaft is abutted with the top end of input rod threaded hole, the upper end surface of measurement rotating shaft is used as the positioning datum plane of input rod, when in-line projection image measuring instrument automatically measures ball head profile and calculates the distance between ball head center and the upper end surface of measurement rotating shaft, measurement result is multiplied by 2, and it is position degree size;After measurement, hand-held input rod, driving element drives measurement rotating shaft to rotate reversely, so that input rod is separated from measurement rotating shaft, and measurement is completed;This kind of measurement mode is lower in cost, and detection efficiency is greatly improved.

[0013] As an improvement, the utility model further includes a bushing, a first through hole is provided on the in-line projection image measuring instrument, a second through hole is provided on the base, the bushing is connected in the first through hole and the second through hole, a first protruding portion is provided on the outer circumferential wall of the bushing and is located above the first through hole and abuts against the in-line projection image measuring instrument, and the measurement rotating shaft is rotatably connected in the bushing.

[0014] As an improvement, a bearing is connected between the measurement rotating shaft and the bushing.

[0015] As an improvement, a second protruding portion is provided on the side wall of the measurement rotating shaft and is located above the bearing and abuts against the inner ring of the bearing; with this structure, the second protruding portion is used to limit the displacement in the vertical direction.

[0016] As an improvement, the driving element is a motor, the driving element is connected to the base, and the driving element is connected to the lower end of the measurement rotating shaft through a connecting shaft sleeve.

[0017] As an improvement, the inner hole of the connecting shaft sleeve is in interference fit with the measurement rotating shaft, and a protruding strip is provided on the side wall of the connecting shaft sleeve and is used to cooperate with the driving element; with this structure, the driving element can stably drive the measurement rotating shaft to rotate.

[0018] As an improvement, the base includes an upper bottom plate, a lower bottom plate and a plurality of columns, the upper bottom plate and the lower bottom plate are connected through the plurality of columns, the driving element is connected to the lower bottom plate, and the in-line projection image measuring instrument is connected to the upper end surface of the upper bottom plate.

[0019] As an improvement, the base further includes a plurality of support plates, the upper bottom plate and the lower bottom plate are further connected through the plurality of support plates; with this structure, the stability of the base as a whole is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a sectional view of the utility model.

[0021] Figure 2 It is a three-dimensional structure schematic view of the utility model.

[0022] Figure 3 It is a three-dimensional structure schematic view of the utility model in measuring rotating shaft.

[0023] Figure 4 It is a connection structure schematic view of the utility model in driving member and connecting shaft sleeve.

[0024] Figure 5 It is a structure schematic view of input rod.

[0025] Reference signs: 1, base; 101, upper bottom plate; 102, lower bottom plate; 103, stand column; 104, support plate; 2, on-line projection image measuring instrument; 3, measuring platform; 4, limiting hole; 5, measuring rotating shaft; 6, external thread; 7, driving member; 8, bush; 9, first through hole; 10, second through hole; 11, first protruding part; 12, bearing; 13, second protruding part; 14, connecting shaft sleeve; 15, convex strip. DETAILED DESCRIPTION

[0026] The utility model discloses a gauge for detecting the position degree of the ball head of input rod makes detailed description below in conjunction with the drawings.

[0027] As Figures 1 to 4 Indicated, a kind of gauge for detecting the position degree of the ball head of input rod, for the size of input rod as Figure 5 Indicated, it includes: base 1, on-line projection image measuring instrument 2 connected to base 1, measuring platform 3 connected to on-line projection image measuring instrument 2, measuring rotating shaft 5 and driving member 7 rotationally connected to base 1, wherein, on-line projection image measuring instrument 2 is used to measure input rod size, its specific structure and working principle are prior art, not repeated here.

[0028] As Figure 1 Indicated, base 1 includes upper bottom plate 101, lower bottom plate 102, several stand columns 103 and several support plates 104, upper bottom plate 101 is located on the upper bottom plate 102, upper bottom plate 101 and lower bottom plate 102 are connected by several stand columns 103, upper bottom plate 101 and lower bottom plate 102 are also connected by several support plates 104;In the embodiment, stand column 103 is four, and support plate 104 is two, wherein four stand columns 103 are distributed in four corners, and two support plates 104 are located on the two sides of stand column 103. Base 1 is selected as a whole 35CrMo die steel.

[0029] As Figure 1 And Figure 2As shown, the online projection image measuring instrument 2 is connected to the upper end face of the upper base plate 101. The measuring platform 3 is connected to the online projection image measuring instrument 2 and located between the two probes. The upper end face of the measuring platform 3 is provided with a limiting hole 4. The limiting hole 4 is a circular hole, and its inner diameter matches the size of the hexagonal part of the input rod to limit the hexagonal part. Specifically, as shown... Figure 1 As shown.

[0030] like Figure 1 As shown, the upper end of the measuring rotary shaft 5 passes through the measuring platform 3 and is located within the limiting hole 4. The upper end of the measuring rotary shaft 5 is provided with an external thread 6 for threaded connection with the input rod, and the upper end face of the measuring rotary shaft 5 is a plane for abutting against the top of the threaded hole of the input rod. The measuring rotary shaft 5 is made of CD-EDM650 tungsten steel.

[0031] This utility model also includes a bushing 8. The online projection image measuring instrument 2 is provided with a first through hole 9, and the base 1 is provided with a second through hole 10. Specifically, the upper base plate 101 is provided with a second through hole 10. The first through hole 9 and the second through hole 10 are coaxially arranged. The bushing 8 is connected in the first through hole 9 and the second through hole 10. The outer peripheral wall of the bushing 8 is provided with a first protrusion 11 located above the first through hole 9 and abutting against the online projection image measuring instrument 2. The measuring rotating shaft 5 is rotatably connected in the bushing 8.

[0032] The first protrusion 11 and the bushing 8 are integrally formed, both made of FDAC mold steel. The outer diameter of the bushing 8 matches the first through hole 9 and the second through hole 10. The bushing 8 is connected and fixed to the online projection image measuring instrument 2. Figure 1 As shown, a bearing 12 is connected between the measuring rotating shaft 5 and the bushing 8. The bearing 12 consists of two tapered roller bearings, one upper and one lower. The inner hole of the bushing 8 is interference-fitted with the outer ring of the two bearings 12 to limit the displacement of the measuring rotating shaft 5 in the diameter and length directions, ensuring that the measuring rotating shaft 5 can rotate smoothly and be threaded. At the same time, it also realizes the rotational connection of the measuring rotating shaft 5 relative to the base 1.

[0033] like Figure 1 As shown, the measuring rotating shaft 5 has a second protrusion 13 located above the bearing 12 and abutting against the inner ring of the bearing 12 on its side wall, specifically located above the bearing 12.

[0034] The lower end of the measuring rotating shaft 5 is connected to the driving component 7. Specifically, as follows: Figure 1 As shown, the driving component 7 is connected to the lower base plate 102. The driving component 7 is used to drive the measuring rotating shaft 5 to rotate, as shown. Figure 4 As shown, the driving component 7 is a motor. The driving component 7 is connected to the base 1. The driving component 7 is connected to the lower end of the measuring rotating shaft 5 through the connecting bushing 14. The inner hole of the connecting bushing 14 is interference-fitted with the measuring rotating shaft 5. The side wall of the connecting bushing 14 is provided with a protrusion 15 for cooperating with the driving component 7.

[0035] The connecting sleeve 14 is made of FDAC die steel, and the measuring platform 3 is made of CD-EDM650 tungsten steel.

[0036] The worker holds the input rod in a state that the threads of the input rod are downward, puts the input rod into the limiting hole 4, drives the measuring rotating shaft 5 to rotate by the driving part 7, makes the measuring rotating shaft 5 threadedly connected with the input rod, and makes the upper end surface of the measuring rotating shaft 5 abut against the top end of the threaded hole of the input rod, takes the upper end surface of the measuring rotating shaft 5 as the positioning reference surface of the input rod, at this time, the on-line projection image measuring instrument 2 automatically measures the contour of the ball head and calculates the distance between the ball head center and the upper end surface of the measuring rotating shaft 5, multiplies the measuring result by 2 to obtain the position degree size; after the measurement is completed, the worker holds the input rod, drives the measuring rotating shaft 5 to reversely rotate by the driving part 7, makes the input rod separated from the measuring rotating shaft 5, and completes the measurement; the measurement mode has low cost and greatly improves the detection efficiency.

[0037] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned one embodiment, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model.

Claims

1. A gage for detecting the position of a ball head of an input rod, characterized by, It comprises: a base (1); an online projection image measuring instrument (2) connected to the base (1) for measuring the size of an input rod; a measuring platform (3) connected to the online projection image measuring instrument (2), the upper end surface of the measuring platform (3) being provided with a limiting hole (4); a measuring rotating shaft (5) rotatably connected to the base (1), the upper end of the measuring rotating shaft (5) penetrating through the measuring platform (3) and being located in the limiting hole (4), the upper end of the measuring rotating shaft (5) being provided with an external thread (6) for threadedly connecting with the input rod, and the upper end surface of the measuring rotating shaft (5) being a flat surface for abutting against the top end of the threaded hole of the input rod; a driving member (7) for driving the measuring rotating shaft (5) to rotate.

2. The gage for detecting the position of the ball head of an input rod according to claim 1, wherein It further comprises a bushing (8), the online projection image measuring instrument (2) being provided with a first through hole (9), the base (1) being provided with a second through hole (10), the bushing (8) being connected in the first through hole (9) and the second through hole (10), the outer peripheral wall of the bushing (8) being provided with a first protruding part (11) located above the first through hole (9) and abutting against the online projection image measuring instrument (2), and the measuring rotating shaft (5) being rotatably connected in the bushing (8).

3. The gage for detecting the position of the ball head of an input rod according to claim 2, wherein A bearing (12) is connected between the measuring rotating shaft (5) and the bushing (8).

4. The gage for detecting the position of the ball head of an input rod according to claim 3, wherein A second protruding part (13) is provided on the side wall of the measuring rotating shaft (5) and located above the bearing (12) and abutting against the inner ring of the bearing (12).

5. The gage for detecting the position of the ball head of an input rod according to claim 1, wherein The driving member (7) is a motor, the driving member (7) is connected to the base (1), and the driving member (7) is connected with the lower end of the measuring rotating shaft (5) through a connecting shaft sleeve (14).

6. The gage for detecting the position of the ball head of an input rod according to claim 5, wherein The inner hole of the connecting shaft sleeve (14) is in interference fit with the measuring rotating shaft (5), and the side wall of the connecting shaft sleeve (14) is provided with a convex strip (15) for cooperating with the driving member (7).

7. The gage for detecting the position of the ball head of an input rod according to claim 1, wherein The base (1) comprises an upper bottom plate (101), a lower bottom plate (102), and a plurality of stand columns (103), the upper bottom plate (101) and the lower bottom plate (102) are connected through the plurality of stand columns (103), the driving member (7) is connected to the lower bottom plate (102), and the online projection image measuring instrument (2) is connected to the upper end surface of the upper bottom plate (101).

8. The gage for detecting the position of the ball head of the input rod according to claim 7, wherein, The base (1) further comprises a plurality of support plates (104), and the upper bottom plate (101) and the lower bottom plate (102) are further connected through the plurality of support plates (104).

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