Transmission instrument backlash measurement method

Abstract

The invention discloses a backlash measurement method for a transmission instrument, and relates to the field of transmission instrument testing, the backlash measurement method comprises the steps of obtaining the deflection amount of a connecting shaft, a measuring rod, a moment arm rod and a light plate, and the measurement method comprises the following steps: S1, installing the connecting shaft and the measuring rod together, connecting the connecting shaft with an instrument to be measured, and installing the moment arm rod and the light plate on the measuring rod; s2, rotating the measuring rod to enable the force arm rod to be in a horizontal state, and then fixing the measuring rod; s3, a weight is hung on the force arm rod to enable the connecting shaft to deflect; s4, measuring the deflection amount of the light plate by using a photoelectric autocollimator to obtain an instrument backlash value; the force arm rod is rotated to be in a horizontal state, the light plate on the measuring rod is deflected by hanging the weight on the force arm rod, the offset of the light plate can be measured by aligning the photoelectric autocollimator with the surface of the light plate, the offset angle of the light plate is calculated, measurement is more accurate, and meanwhile, for a special-shaped instrument shell, measurement accuracy is improved. The backlash value can be measured by adjusting the measuring rod.

Description

Technical Field

[0001] The invention relates to the field of transmission instrument testing, and in particular to a transmission instrument backlash measurement method. Background Art

[0002] Backlash is a phenomenon in which the driven wheel lags behind when the driving wheel rotates in the opposite direction. The lagging angle is the backlash error angle. The main reason for backlash is the existence of side clearance in a pair of gears. Theoretically, a pair of meshing gears can be free of side clearance, but in some cases, side clearance is necessary for the normal operation of the transmission. Due to the existence of side clearance, the gear teeth can be prevented from getting stuck due to machining errors of parts. Therefore, it is necessary to measure the backlash value. Most simple measurements on the market measure the vertical displacement through a dial indicator, and the backlash angle can be obtained through the lever arm value and the vertical displacement. The above method requires the lever arm length to be measured in advance, and the measurement accuracy is low. If the hanging rope on the weight slips during measurement, the measured value will be too small, resulting in errors in the measurement results. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide a method for measuring the backlash of a transmission instrument, which directly measures the offset angle of a light plate through a photoelectric autocollimator, and the measured result has higher accuracy, more reliable values, and simpler operation; and an angle dial and a universal joint function are added, which can measure the backlash value of the instrument at different angles.

[0004] The transmission instrument backlash measurement method provided by the present invention adopts the following technical solutions:

[0005] A transmission instrument backlash measurement method includes obtaining a connecting shaft, a measuring rod, a lever arm and a light plate deflection amount, and the measurement method includes the following steps:

[0006] S1. Install the connecting shaft and the measuring rod together, connect the connecting shaft to the instrument to be tested, and install the force arm and the light plate on the measuring rod;

[0007] S2, rotate the measuring rod to make the lever arm in a horizontal state and then fix the measuring rod;

[0008] S3, hang a weight on the lever arm to deflect the connecting shaft;

[0009] S4. Use a photoelectric autocollimator to measure the deflection of the light plate to obtain the instrument return value.

[0010] Furthermore, a rotating sleeve is arranged on the connecting shaft, and the rotating sleeve can be fixed on the connecting shaft, and the force arm rods are respectively arranged on both sides of the rotating sleeve.

[0011] Furthermore, the lever arm is installed on the rotating sleeve through threads.

[0012] Furthermore, a rotating truncated table is provided at the end of the connecting shaft away from the instrument to be tested, and the rotating sleeve is installed on the rotating truncated table.

[0013] Furthermore, a mounting groove for mounting the light plate is formed at the end of the measuring rod away from the connecting shaft.

[0014] Furthermore, it also includes an angle dial which is transmission-connected to the instrument to be tested, and the angle dial is rotated to measure the backlash values ​​at different angles.

[0015] In summary, the present invention includes at least one of the following beneficial effects: rotating the force arm to make it horizontal, and hanging weights on the force arm will cause the light plate on the measuring rod to be deflected. Using a photoelectric autocollimator to align the light plate surface can measure the offset of the light plate, thereby calculating the offset angle of the light plate, and making the measurement more accurate. At the same time, for special-shaped instrument housings, the empty return value can be measured by adjusting the measuring rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The structure of the embodiment of the present invention is shown in FIG. Figure 1 ;

[0017] Figure 2 The structure of the embodiment of the present invention is shown in FIG. Figure 2 .

[0018] Description of reference numerals:

[0019] 1. Connecting shaft; 2. Measuring rod; 21. Mounting slot; 3. Lever rod; 4. Light plate; 5. Rotating sleeve; 6. Rotating round table; 7. Angle dial. DETAILED DESCRIPTION

[0020] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0021] The following is combined with Figure 1-2 The present invention is described in further detail.

[0022] The embodiment of the present invention discloses a method for measuring the backlash of a transmission instrument. Figure 1-2 The transmission instrument backlash measurement method includes obtaining the deflection of the connecting shaft 1, the measuring rod 2, the lever arm 3 and the light plate 4, and the measurement method includes the following steps:

[0023] Step 1: Install the connecting shaft 1 and the measuring rod 2 together, connect the connecting shaft 1 to the instrument to be tested, and install the lever arm 3 and the light plate on the measuring rod 2;

[0024] Step 2: rotate the measuring rod 2 so that the lever arm 3 is in a horizontal state and then fix the measuring rod 2;

[0025] Step 3: Hang a weight on the lever arm 3 to deflect the connecting shaft 1;

[0026] Step 4: Use a photoelectric autocollimator to measure the deflection of the light plate 4 to obtain the instrument return value.

[0027] By hanging weights on the force arm 3, the light plate 4 on the measuring rod 2 will be deflected. By using a photoelectric autocollimator to align the surface of the light plate 4, the offset of the light plate 4 can be measured, thereby calculating the offset angle of the light plate 4 and obtaining the return angle value, making the measurement more accurate. At the same time, for special-shaped instrument housings, the return value can be measured by adjusting the measuring rod 2.

[0028] In this embodiment, a rotating sleeve 5 is provided on the connecting shaft 2, and the rotating sleeve 5 can be fixed on the connecting shaft 1. The force arm rod 3 is respectively provided on both sides of the rotating sleeve 5. The rotating sleeve 5 is rotated to adjust the angle of the force arm rod 3, and the rotating sleeve 5 is fixed on the rotating table 6 by using screws.

[0029] In this embodiment, the lever arm 3 is installed on the rotating sleeve 5 by means of threads, so that the lever arm 3 can be easily disassembled and installed. Meanwhile, the extending length of the lever arm 3 can be adjusted by rotating the lever arm 3 .

[0030] In this embodiment, a rotating truncated table 6 is provided at the end of the connecting shaft 1 away from the instrument to be tested, and the rotating sleeve 5 is installed on the rotating truncated table 6 .

[0031] In this embodiment, a mounting groove 21 for mounting the light board 4 is formed at the end of the measuring rod 2 away from the connecting shaft 1 , and the light board 4 is fixed in the mounting groove 21 by screws.

[0032] In this embodiment, an angle dial 7 is also included which is transmission-connected to the instrument to be measured. The angle dial 7 is rotated to measure the backlash values ​​at different angles. By rotating the angle dial 7, the instrument to be measured will also produce backlash. After being rotated to a certain angle, the angle dial is fixed, and a weight is hung on the lever arm 3 to cause the connecting shaft 1 to be offset. At the same time, the light plate 4 will also be offset. The offset of the light plate 4 is measured by a photoelectric autocollimator to obtain the backlash value at the angle. The backlash values ​​at different angles can be measured by rotating the angle dial 7 to different angles.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A transmission instrument backlash measurement method, characterized in that: The deflection amount of a connecting shaft (1), a measuring rod (2), a force arm rod (3) and a light plate (4) is obtained, and the measuring method comprises the following steps: S1, installing the connecting shaft (1) and the measuring rod (2) together, connecting the connecting shaft (1) to the instrument to be measured, and installing the force arm rod (3) and the light plate on the measuring rod (2); S2, rotating the measuring rod (2) so that the lever arm (3) is in a horizontal state, and then fixing the measuring rod (2); S3, hanging a weight on the lever arm (3) to deflect the connecting shaft (1); S4. Use a photoelectric autocollimator to measure the deflection of the light plate (4) to obtain the instrument return value.

2. The transmission instrument backlash measurement method according to claim 1, characterized in that: The connecting shaft (2) is provided with a rotating sleeve (5), the rotating sleeve (5) can be fixed on the connecting shaft (1), and the force arm rods (3) are respectively provided on both sides of the rotating sleeve (5).

3. The transmission instrument backlash measurement method according to claim 2, characterized in that: The lever arm (3) is mounted on the rotating sleeve (5) via threads.

4. The transmission instrument backlash measurement method according to claim 2, characterized in that: A rotating truncated table (6) is provided at the end of the connecting shaft (1) away from the instrument to be tested, and the rotating sleeve (5) is mounted on the rotating truncated table (6).

5. The transmission instrument backlash measurement method according to claim 1, characterized in that: An installation groove (21) for installing the light plate (4) is provided at the end of the measuring rod (2) away from the connecting shaft (1).

6. The transmission instrument backlash measurement method according to claim 1, characterized in that: It also comprises an angle scale plate (7) which is transmission-connected to the instrument to be measured, and the angle scale plate (7) is rotated to measure the backlash values ​​at different angles.

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