CN103424052A - Device for measuring height of center of inner star wheel fairway - Google Patents

Abstract

The invention provides a measuring device for the center height of the inner star wheel fairway, which includes a measuring frame, a length error measuring tool vertically installed on the measuring frame, the bottom end of the length error measuring tool is connected with a measuring substrate, and a The positioning plate used for positioning the inner star wheel, at least three positioning balls are evenly fixed on the circumference of the positioning plate. On, adjust the length error measuring tool so that the measuring substrate is attached to the upper surface of the inner star wheel to be tested; the length error measuring tool is provided with a dial indicator or a dial gauge. The device for measuring the center height of the inner star wheel fairway of the present invention has the advantages of simple structure, convenient measurement and improved measurement rate.

Description

Inner star wheel fairway center height measuring device

technical field

The invention relates to a measuring tool, in particular to a measuring device for the center height of an inner star wheel fairway.

Background technique

As the key parts of the constant velocity universal joint, the ball cage and inner star wheel are divided into RE, AC, UF, VL and other parts according to their joint types. The dimensional accuracy of the center height is very high, which directly affects the performance of the assembly.

The measurement of the center height of the inner star wheel fairway is usually carried out in Helios, and a special fixture is required for the measurement. If there is no special fixture, the three-coordinate measurement will be used, which will cause a long downtime of the machine tool on site, and is not conducive to the quality control of the process. . In the past, the center height of the inner star wheel fairway was measured by using the German ZEISS three-coordinate measuring instrument. The advantage of this method is that it is more accurate, but the measurement time is very long, about 20 minutes. If the measurement auxiliary time is added, then It takes more time. For occasions that require frequent measurements, this measurement method is extremely unfavorable for quality control in the production process.

Chinese patent CN201407975Y discloses a ball cage, an inner star wheel inner and outer spherical center height measuring tool, which includes a limit column, a fixed probe, a movable probe, a measuring rod and a dial gauge, and the middle of the measuring rod is hinged on the limit On the column, the upper end of the measuring rod is connected to the movable measuring head, the lower end of the measuring rod is against the measuring head of the dial indicator, the dial indicator is fixed on the limit column, and the fixed The measuring head is arranged on the limit post. It calculates the center height of the inner star wheel by comparison and measurement. The structure of the measuring device is complex and requires precise adjustment during measurement, which has certain limitations and cannot be applied to continuous production.

Therefore, there is a lack of a measuring device that has a simple structure, can accurately measure the center height of the inner star wheel fairway, is suitable for measuring the center height of various inner star wheels, and can increase the measuring speed.

Contents of the invention

In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a measuring device for the center height of the inner star wheel fairway, which is used to solve the problem that the center height of the inner star wheel fairway cannot be quickly measured in the prior art, nor can it be widely applied question.

In order to achieve the above purpose and other related purposes, the present invention provides a device for measuring the center height of the inner star wheel fairway, including a measuring frame, a length error measuring tool vertically installed on the measuring frame, the bottom end of the length error measuring tool is connected with a measuring substrate, A positioning plate for positioning the inner star wheel is provided directly below the length error measuring tool, and at least three positioning balls are evenly fixed on the circumference of the positioning plate. The ball is matched and supported on the positioning plate, and the measuring substrate is attached to the upper surface of the inner star wheel to be tested; the length error measuring tool is provided with a dial indicator or a dial gauge.

Preferably, the measuring frame includes a chassis and a bracket fixed on the chassis, the positioning plate is fixed on the chassis, and the length error gauge is installed on the bracket.

Preferably, the length error measuring tool is provided with a rotating seat, and a card slot is provided at the bottom of the rotating seat, and a support is provided on the measuring frame, and a via hole is provided in the support, and a hole is provided in the via hole A pin is provided on the inner wall of the top end, the length error measuring tool is passed through the through hole and the rotating seat is located above the support, and the pin can be snapped into the slot for fixing when rotating the rotating seat The length error gauge.

Preferably, a spring is provided in the support, and the spring is sheathed on the length error measuring instrument. One end of the spring is connected to the rotating seat and the other end is connected to the support.

Preferably, the length error measuring tool also includes a measuring rod and a cover, the top end of the measuring rod leans against the dial indicator or the measuring head of the dial indicator, and the bottom end of the measuring rod is in contact with the measuring head. The base plates are connected, the watch cover is sleeved on the measuring rod, and the top of the watch cover is fixedly connected with the dial gauge or the dial indicator.

Preferably, a spring accommodating cavity is provided in the watch cover, a spring is sheathed on the measuring rod, and the spring is limited in the spring accommodating cavity.

Preferably, the diameter of the positioning ball is the same as the corresponding diameter of the arc segment on the inner star wheel fairway.

Preferably, the positioning disc is provided with a clip for fixing the positioning ball, and the clip includes a limiting column and a limiting plate fixed on the limiting column, and the positioning ball is clamped between the limiting plate and the limiting plate. In the space enclosed by the limit column.

As mentioned above, the device for measuring the center height of the inner star wheel fairway of the present invention has the following beneficial effects: it uses a special positioning plate to locate the inner star wheel. Located at both ends of the inner star wheel fairway, the present invention utilizes the characteristics of the inner star wheel fairway itself, and sets the positioning ball on the positioning plate to make the positioning ball contact with the arc section of the inner star wheel fairway, and reach the positioning inner position through three positioning balls. Star wheel, so that when measuring, you only need to select the standard inner star wheel, adjust the size of the positioning ball and the reading of the dial indicator, and then you can accurately measure whether the center height of the inner star wheel to be tested is qualified or not; its structure It is simple and the measurement time is short; and the positioning plate of the present invention can be designed according to different models of the inner star wheel, so that the measuring device of the present invention is suitable for various types of inner star wheels.

Description of drawings

Fig. 1 is a schematic view of the measuring device for the center height of the inner star wheel fairway of the present invention.

Fig. 2 is a cross-sectional view of the device for measuring the center height of the inner star wheel fairway of the present invention.

Component designation description

1 measuring frame

101 Chassis

102 bracket

2 dial indicator

201 Probe

3 Measuring the substrate

5 positioning plate

501 limit post

502 limit plate

6 set ball

7 swivel seat

701 card slot

8 support

801 pin

9 spring

10 watch case

12 spring

Detailed ways

The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

Please refer to Figure 1 to Figure 2. It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. Limiting conditions, so there is no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of the present invention, should still fall within the scope of the present invention. The disclosed technical content must be within the scope covered. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit this specification. The practicable scope of the invention and the change or adjustment of its relative relationship shall also be regarded as the practicable scope of the present invention without any substantial change in the technical content.

As shown in Figures 1 and 2, the present invention provides a device for measuring the center height of the inner star wheel fairway, including a measuring frame 1, a length error measuring tool vertically installed on the measuring frame, and a measuring substrate connected to the bottom of the length error measuring tool 3. There is a positioning plate 5 for positioning the inner star wheel directly below the length error measuring tool, and at least three positioning balls 6 are evenly fixed on the circumference of the positioning plate 5. When measuring, the measured inner star wheel passes through the inner star wheel fairway. The arc section cooperates with the positioning ball 6 and is supported on the positioning disk 5, and the measuring substrate 3 is attached to the upper surface of the inner star wheel to be tested; The present invention uses a special positioning plate to locate the inner star wheel. As we all know, the inner star wheel fairway is composed of an arc segment and a straight line segment, and the arc segment is located at both ends of the inner star wheel fairway. The present invention uses the characteristics of the inner star wheel fairway itself By setting the positioning ball on the positioning plate, the positioning ball is in contact with the arc section of the inner star wheel fairway, and through the close fit of the arc surface and the arc surface, the three positioning balls are positioned on the inner star wheel, and then the inner star wheel is positioned and measured. center height. In this way, when measuring, you only need to select the standard part of the inner star wheel, adjust the size of the positioning ball and the reading of the dial indicator through the standard part of the inner star wheel, and then you can determine whether the center height of the inner star wheel to be tested is qualified and accurately measure out. Moreover, the positioning plate of the present invention can be designed according to different types of inner star wheels, so that the measuring device of the present invention is applicable to various types of inner star wheels.

As shown in Figure 2, for the convenience of measurement, the above-mentioned length error gauge also includes a measuring rod 10 and a watch cover 11, the top of the measuring rod 10 leans against the probe 201 of the dial indicator or dial gauge 2, and the measuring rod 10 The bottom end of the meter is connected with the measuring substrate 3, the meter cover 11 is set on the measuring rod 10, and the top of the meter cover 11 is fixedly connected with the dial indicator or the dial indicator 2. A spring accommodating chamber is arranged in the watch case 11, and a spring 12 is sleeved on the measuring rod 10. The spring 12 is limited in the spring accommodating chamber, and the measuring stroke of the dial indicator or the dial gauge can be ensured by the spring.

For the convenience of measurement, the above-mentioned length error measuring tool is covered with a rotating base 7, and a slot 701 is provided at the bottom of the rotating base 7. A support 8 is provided on the measuring frame 1, and a through hole is provided in the support 8. A pin 801 is provided on the inner wall at the top of the via hole, the length error gauge is passed through the via hole and the swivel seat 7 is located above the support 8, and the rotating swivel seat pin 801 can be snapped into the slot 701 to fix the length error gauge. There is a spring 9 inside the support 8, and the spring 9 is sleeved on the length error measuring tool. One end of the spring 9 is connected with the rotating seat 7 and the other end is connected with the support 8. The spring has a certain reset stroke, which is convenient for dial indicator. or dial gauge lift. When using the measuring device of the present invention, the length error measuring tool is lifted first, so that the inner star wheel is conveniently supported on the positioning plate, and then the length error measuring tool is fixed through the cooperation of the rotating seat and the support, and then the dial indicator is fixed. Or a dial gauge, for center height measurements.

Above-mentioned measuring frame 1 comprises chassis 101 and the support 102 that is fixed on chassis 101, and positioning disc 5 is fixed on the chassis 101 by bolt, can disassemble positioning disc conveniently like this, and positioning disc can be designed according to the model size of inner star wheel, makes The measuring device of the present invention is applicable to various types of inner star wheels; the above-mentioned length error measuring tool is installed on the bracket 102 .

For better positioning of the inner star wheel, the diameter of the positioning ball 6 is the same as the corresponding diameter of the arc segment on the inner star wheel fairway. The locating plate 5 is provided with clips for fixing the locating ball 6. The clips include a spacer post 501 and a spacer plate 502 fixed on the spacer post. In the formed space, fix the positioning ball.

The measurement principle and specific measurement steps of the center height measuring device of the inner star wheel fairway of the present invention are as follows: the measuring device uses the positioning ball 6 to position and support the inner star wheel, and the spherical arc of the positioning ball 6 and the arc section on the inner star wheel fairway Contact uses the close fit between the arc surface and the arc surface to make the support stable; at this time, the upper surface of the inner star wheel is used as the reference plane, and whether the height of the reference plane is qualified is to measure whether the center height of the inner star wheel is qualified. When measuring, first use the inner star wheel standard part to adjust and determine the standard, put the inner star wheel standard part on the positioning plate 5 to determine the size and fixing degree of the positioning ball, and then set the dial indicator 2 (you can also choose the dial indicator ) is fixed on the measuring frame 1, and the reading of the dial indicator 2 is adjusted to zero; then the above-mentioned rotating seat 7 is rotated to raise the dial indicator, and the standard part of the inner star wheel is taken out, and the inner star wheel to be tested is placed on the positioning plate 5; Rotate the rotating base 7 to fix the dial indicator 2 to measure the inner star wheel to be tested, and check whether the reading of the dial indicator 2 is within the allowable error range. If it is within the error range, the center height of the inner star wheel fairway of the inner star wheel to be tested is qualified. Otherwise, the inner star wheel to be tested is unqualified. Therefore, the measuring device of the present invention can shorten the measuring time, improve the measuring efficiency, ensure the measuring accuracy, and meet the requirement of continuous production of the inner star wheel.

In summary, the measuring device of the present invention has a simple structure, is suitable for measuring various inner star wheels, not only shortens the measurement time, improves the measurement efficiency, but also ensures the measurement accuracy, and meets the needs of continuous production of inner star wheels. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has high industrial application value.

The above-mentioned embodiments only illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention should still be covered by the claims of the present invention.

Claims (8)

1. A measuring device for the center height of the inner star wheel fairway, characterized in that it includes a measuring frame (1), a length error measuring tool vertically installed on the measuring frame (1), and the bottom end of the length error measuring tool is connected with a measuring substrate ( 3), there is a positioning plate (5) for positioning the inner star wheel directly below the length error measuring tool, and at least three positioning balls (6) are evenly fixed on the circumferential direction of the positioning plate (5). When measuring, the measured inner star wheel The wheel is supported on the positioning disk (5) through the arc segment of the inner star wheel fairway and the positioning ball (6), and the measurement substrate (3) is attached to the upper surface of the inner star wheel under test; the A dial indicator or a dial indicator (2) is provided on the length error measuring tool. 2. The device for measuring the center height of the inner star wheel fairway according to claim 1, characterized in that: the measuring frame (1) includes a chassis (101) and a bracket (102) fixed on the chassis, and the positioning plate ( 5) It is fixed on the chassis (101), and the length error gauge is installed on the bracket (102). 3. The device for measuring the center height of the inner star wheel fairway according to claim 1, characterized in that: the length error measuring tool is provided with a rotating seat (7), and a card slot is provided at the bottom of the rotating seat (7) (701), the measuring frame (1) is provided with a support (8), and a via hole is provided in the support (8), and a pin (801) is provided on the inner wall at the top of the via hole, and the The length error gauge is passed through the through hole and the swivel seat (7) is located above the support (8), and the pin (801) can be snapped into the slot by rotating the swivel seat (8) (701) Internally fix the length error gauge. 4. The device for measuring the center height of the inner star wheel fairway according to claim 3, characterized in that: a spring (9) is provided in the support (8), and the spring (9) is sleeved on the length On the error gauge, one end of the spring (9) is connected to the rotating seat (7) and the other end is connected to the support (8). 5. The device for measuring the center height of the inner star wheel fairway according to claim 1, characterized in that: the length error measuring tool also includes a measuring rod (10) and a watch cover (11), and the top end of the measuring rod (10) leaning against the measuring head (201) of the dial gauge or dial indicator (2), the bottom end of the measuring rod (10) is connected with the measuring substrate (3), and the gauge cover (11) Sleeved on the measuring rod (10), the top of the gauge cover (11) is fixedly connected with the dial gauge or dial gauge (2). 6. The device for measuring the height of the center of the inner star wheel fairway according to claim 5, characterized in that: the watch cover (11) is provided with a spring accommodating cavity, and the measuring rod (10) is provided with a spring (12), the spring (12) is limited in the spring accommodation cavity. 7. The device for measuring the center height of the inner star wheel fairway according to claim 1, characterized in that: the diameter of the positioning ball (6) is the same as the corresponding diameter of the arc segment on the inner star wheel fairway. 8. The device for measuring the center height of the inner star wheel fairway according to claim 1, characterized in that: the positioning plate (5) is provided with a clamp for fixing the positioning ball, and the clamp includes a limit post (501) and a limiting plate (502) fixed on the limiting column, the positioning ball (6) is clamped in the space enclosed by the limiting plate (502) and the limiting column (501).

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