CN108287071B - Device and method for measuring gear transmission loss rate - Google Patents

Abstract

The invention provides a device and a method for measuring the transmission loss rate of a gear, belonging to the field of gears and comprising a motor, a dynamometer motor, a rotating speed torque sensor and two gears, wherein each gear comprises a wheel disc and a plurality of gear teeth; the two gears are meshed, the output end of the motor is connected with one gear through a rotating speed torque sensor, and the other gear is connected with the dynamometer motor through a rotating speed torque sensor. The device for measuring the gear transmission loss rate can be used for measuring gears with various radiuses and various tooth numbers by combining the wheel disc and the gear teeth, so that the power loss of various gears in the transmission process can be conveniently obtained.

Description

A device and method for measuring gear transmission loss rate

technical field

The invention relates to the field of gears, in particular, to a device and a method for measuring transmission loss rate of gears.

Background technique

Gear refers to a mechanical element that continuously meshes with gears on the rim to transmit motion and power. The application of gears in transmission has long appeared. Gear transmission has the advantages of high precision and high efficiency. In the mechanical structure, the higher the precision of the machine, the higher the requirements for the gear, the gear itself needs to have very high precision, and its transmission efficiency is accurate and reliable.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a device for measuring the transmission loss rate of gears, so as to detect the efficiency of various gears in the transmission process.

The purpose of the present invention is to provide a measuring method to detect the efficiency of various gears in the transmission process.

The present invention is realized in this way:

Based on the above first object, the present invention provides a device for measuring gear transmission loss rate, comprising a motor, a dynamometer motor, a rotational speed torque sensor and two gears, the gears include a wheel disc and a plurality of gear teeth, the The wheel disc is provided with a central hole and a plurality of installation rings, a plurality of the installation rings are arranged at intervals along the radial direction of the wheel disc, the installation rings are arranged coaxially with the central hole, and each of the installation rings includes a plurality of installation holes, a plurality of the gear teeth are respectively installed in the plurality of the installation holes, and the working end of the gear teeth protrudes from the surface of the wheel disc; the two gears are meshed, and the output of the motor The end is connected to one of the gears through the rotational speed torque sensor, and the other gear is connected to the dynamometer motor through the rotational speed torque sensor.

The device for measuring the transmission loss rate of gears provided by the present invention can measure gears with various radii and tooth numbers by combining the wheel disc and the gear teeth, so as to conveniently obtain the power loss of various gears in the transmission process.

In an implementation of this embodiment, the axis line of the mounting hole is arranged in parallel with the axis line of the center hole, and the cross section of the mounting hole is not circular.

After installing the gear teeth into the mounting holes, it is required that the gear teeth cannot rotate along the centerline of the mounting holes.

In an implementation manner of this embodiment: the cross-section of the mounting hole is rectangular.

The rectangular mounting hole is more convenient in production, and at the same time, the mounting hole has less influence on the structural strength of the wheel disc.

In an implementation of this embodiment: the gear teeth include a mounting end and the working end, the mounting end and the working end are vertically arranged, and the shape of the cross section of the mounting end is the same as the shape of the mounting hole. The cross-sectional shape is the same, the mounting end is clamped to the mounting hole, the working end protrudes from the surface of the wheel disc, and a plurality of the gear teeth are located on the same side of the wheel disc.

In an implementation of this embodiment: the wheel disk includes a mounting surface and a driving surface, the gear teeth are located on the mounting surface, the rotational speed and torque sensor is located on the driving surface, and the mounting hole is provided with There is a first inclined surface, the first inclined surface is inclined inward along the direction of the mounting surface toward the driving surface, and the mounting end is provided with a second inclined surface, and the second inclined surface is inward in the direction away from the working end tilt.

During installation, the first inclined surface can facilitate the installation end to quickly enter the installation hole. After installation, the second inclined surface cooperates with the first inclined surface to fill the gap between the installation end and the installation hole, preventing the gear teeth from being trapped in the wheel disc. shake up.

In an implementation of this embodiment, the inclination angle of the first inclined plane is smaller than the inclination angle of the second inclined plane.

In this way, the first slope can further position and fix the installation end.

In an implementation of this embodiment, the installation end includes a positioning rod and two elastic pieces, the two elastic pieces are respectively located on both sides of the positioning rod, and the elastic pieces have a tendency to move away from the positioning rod.

During installation, pinch the two shrapnel tightly so that the end of the shrapnel away from the working end is close to the positioning rod, then insert the mounting end into the installation hole, release the shrapnel, and the shrapnel abuts on the side wall of the installation hole to complete the fixation.

In an implementation of this embodiment: the elastic piece includes an elastic part and a clamping part, one end of the elastic part is connected with the working end, and the other end of the elastic part is connected with the clamping part, The engaging portion is located on a side of the elastic portion away from the other elastic portion.

The clamping part is clamped on the driving surface and cooperates with the first inclined surface and the second inclined surface. The clamping end makes the gear teeth have a tendency to move toward the driving surface. When no external force is applied to the shrapnel, the first inclined surface and the second inclined surface can prevent the mounting end from shaking, and the engagement of the snap portion with the first inclined surface and the second inclined surface can prevent the mounting portion from sliding along the centerline of the mounting hole.

In an implementation of this embodiment, the gear further includes a magnet, the magnet is circular, the magnet is mounted on the wheel disc, and the mounting end abuts against the magnet.

After installing the mounting part into the mounting hole, the mounting part abuts on the magnet, and the gear teeth are fixed by the attraction force of the magnet. The two-slope fit can prevent the mounting part from sliding along the centerline of the mounting hole.

Based on the above-mentioned second purpose, the present invention also provides a measurement method, comprising the following steps:

Step S1: Confirm the gear set to be measured, respectively install the gear teeth in the mounting holes on the corresponding mounting ring, so that the two gears are fully meshed;

Step S2: the motor drives one of the gears to rotate, measures the input torque of the motor, installs a dynamometer motor on the other gear, and measures the output torque of the dynamometer motor;

Step S3: After the measurement is completed, restart the motor to make the motor rotate in the reverse direction, and then measure the input torque of the motor and the output torque of the dynamometer motor.

The method provided by the invention can measure gears with various numbers of teeth, so as to conveniently obtain the power loss of various gears in the transmission process.

Compared with the prior art, the beneficial effects realized by the present invention are:

The device for measuring the transmission loss rate of gears provided by the present invention can measure gears with various radii and tooth numbers by combining the wheel disc and the gear teeth, so as to conveniently obtain the power loss of various gears in the transmission process.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the practical drawings required in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings described below These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

Fig. 1 shows the schematic diagram of the device for measuring gear transmission loss rate provided by Embodiment 1 of the present invention;

FIG. 2 shows a schematic diagram of the roulette provided in Embodiment 1 of the present invention;

FIG. 3 shows a schematic diagram of the gear teeth provided in Embodiment 1 of the present invention;

FIG. 4 shows a cross-sectional view of the roulette provided in Embodiment 1 of the present invention;

Figure 5 shows a cross-sectional view of the gear teeth provided in Embodiment 1 of the present invention;

FIG. 6 shows a schematic diagram of the device for measuring gear transmission loss rate provided by Embodiment 1 of the present invention;

Fig. 7 shows the cross-sectional view of the gear teeth provided by Embodiment 2 of the present invention;

FIG. 8 shows a cross-sectional view of the roulette provided in Embodiment 3 of the present invention.

In the figure: 101-wheel plate; 102-gear teeth; 103-center hole; 104-installation hole; 105-working end; 106-installation end; 107-first slope; 108-installation surface; 109-drive surface; 110 -Second slope; 111-Positioning rod; 112-Elastic part; 113-Clamping part; 114-Shrapnel; 115-Magnet; 116-Motor; 117-Rotation torque sensor;

Detailed ways

The present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described above with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the foregoing detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying what is indicated. A device or element must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or an integrated body; it may be A mechanical connection can also be an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be an internal connection between two elements or an interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, the first feature above or below the second feature may include the first and second features in direct contact, or may include the first and second features that are not in direct contact with each other. through additional characteristic contact between them. Also, the first feature being above, above and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is below, below and below the second feature includes the first feature is directly below and diagonally below the second feature, or simply means that the first feature level is smaller than the second feature.

It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

Example 1

Referring to FIGS. 1 to 5 , the present embodiment provides a device for measuring gear transmission loss rate, including a motor 116 , a dynamometer motor 118 , a rotational speed torque sensor 117 and two gears, the gears include a wheel disc 101 and a plurality of gear teeth 102, the wheel disc 101 is provided with a central hole 103 and a plurality of mounting rings, the plurality of mounting rings are arranged at intervals along the radial direction of the wheel disc 101, the mounting rings are arranged coaxially with the central hole 103, and each mounting ring includes a plurality of mounting holes 104, the plurality of gear teeth 102 are respectively installed in the plurality of mounting holes 104, and the working end 105 of the gear teeth 102 protrudes from the surface of the wheel disc 101; One gear is connected, and the other gear is connected to the dynamometer motor 118 through the rotational speed torque sensor 117 .

The device for measuring gear transmission loss rate provided in this embodiment can measure gears with various radii and numbers of teeth by combining the wheel disc 101 and the gear teeth 102, so as to conveniently obtain the power loss of various gears during the transmission process.

In specific use, the wheel disc 101 is first installed on the output shafts of the motor 116 and the dynamometer motor 118, and then the gear teeth 102 are installed on the wheel disc 101, because the wheel disc 101 is provided with a plurality of mounting rings with different diameters , so after the installation is completed, the two gears can form a variety of transmission ratios.

Among them, the torque speed sensor is installed between the power transmission shafts. It is used in conjunction with the TR-1 torque speed power measuring instrument and the CZ magnetic powder brake to measure various engines, motors, fans, compressors, hydraulic pumps, The torque, speed and power of gear boxes and other power machinery and transmission machinery in the range of 0-6000 rpm.

The axis of the mounting hole 104 is parallel to the axis of the central hole 103 , and the cross section of the mounting hole 104 is not circular. After the gear teeth 102 are installed into the mounting holes 104 , it is required that the gear teeth 102 cannot rotate along the center line of the mounting holes 104 .

The cross section of the mounting hole 104 is rectangular. The rectangular mounting holes 104 are more convenient in manufacturing, and at the same time, the mounting holes 104 have less influence on the structural strength of the wheel disc 101 .

The gear teeth 102 include a mounting end 106 and a working end 105. The mounting end 106 and the working end 105 are arranged vertically. The cross-sectional shape of the mounting end 106 is the same as the cross-sectional shape of the mounting hole 104. The mounting end 106 is snapped into the mounting hole 104. The working end 105 protrudes from the surface of the wheel disc 101 , and a plurality of gear teeth 102 are located on the same side of the wheel disc 101 .

The wheel disc 101 includes a mounting surface 108 and a driving surface 109 , the gear teeth 102 are located on the mounting surface 108 , the rotational speed torque sensor is located on the driving surface 109 , the mounting hole 104 is provided with a first inclined surface 107 , and the first inclined surface 107 faces the drive along the mounting surface 108 The direction of the face 109 is inwardly inclined, and the mounting end 106 is provided with a second inclined surface 110 which is inclined inwardly in a direction away from the working end 105 . During installation, the first inclined surface 107 can facilitate the installation end 106 to enter the installation hole 104 quickly. After installation, the second inclined surface 110 cooperates with the first inclined surface 107 to fill the gap between the installation end 106 and the installation hole 104 , to prevent the gear teeth 102 from shaking on the roulette 101 .

The inclination angle of the first inclined surface 107 is smaller than the inclination angle of the second inclined surface 110 . In this way, the first inclined surface 107 has a further role in positioning and fixing the mounting end 106 .

Example 2

Referring to FIG. 6 , this embodiment also provides a device for measuring gear transmission loss rate. This embodiment is a further improvement on the basis of the technical solution in Embodiment 1. The technical solution described in Embodiment 1 is also applicable to this embodiment. , the technical solutions disclosed in Embodiment 1 will not be described again.

Specifically, the difference between this embodiment and Embodiment 1 is that the installation end 106 of the device for measuring gear transmission loss rate provided in this embodiment includes a positioning rod 111 and two elastic pieces 114 , and the two elastic pieces 114 are respectively located on two sides of the positioning rod 111 . On the other hand, the dome 114 has a tendency to move away from the positioning rod 111 .

When installing, pinch the two elastic pieces 114 tightly, let the end of the elastic pieces 114 away from the working end 105 abut on the positioning rod 111, and then insert the mounting end 106 into the installation hole 104, loosen the elastic pieces 114, the elastic pieces 114 and the mounting hole The side walls of 104 abut to complete the fixing.

The elastic piece 114 includes an elastic part 112 and a clamping part 113 , one end of the elastic part 112 is connected to the working end 105 , the other end of the elastic part 112 is connected to the clamping part 113 , and the clamping part 113 is located in the elastic part 112 away from the other elastic part 112 side. The clamping portion 113 is clamped on the driving surface 109 and cooperates with the first inclined surface 107 and the second inclined surface 110 . The clamping end causes the gear teeth 102 to move toward the driving surface 109 , and the first inclined surface 107 abuts against the second inclined surface 110 , to fix the mounting end 106, when no external force is applied to the elastic piece 114, the first inclined surface 107 and the second inclined surface 110 can prevent the mounting end 106 from shaking, and the clamping portion 113 cooperates with the first inclined surface 107 and the second inclined surface 110 can avoid installation The part slides along the centerline of the mounting hole 104 .

Example 3

Referring to FIG. 7 , this embodiment also provides a device for measuring gear transmission loss rate. This embodiment is a further improvement on the basis of the technical solution of Embodiment 1. The technical solution described in Embodiment 1 is also applicable to this embodiment. , the technical solutions disclosed in Embodiment 1 will not be described again.

Specifically, the difference between this embodiment and Embodiment 1 is that the gear of the device for measuring gear transmission loss rate provided in this embodiment further includes a magnet 115, the magnet 115 is circular, the magnet 115 is installed on the wheel disc 101, and the installation end 106 connected to the magnet 115 .

After the installation part is installed in the installation hole 104, the installation part abuts on the magnet 115, and the gear teeth 102 are fixed by the attraction force of the magnet 115. The suction force of the first slanted surface 107 and the second slanted surface 110 can prevent the installation part from sliding along the center line of the installation hole 104 .

Example 4

This embodiment also provides a measurement method, comprising the following steps:

Step S1: confirm the gear set to be measured, install the gear teeth 102 in the mounting holes 104 on the corresponding mounting rings respectively, so that the two gears are fully meshed;

Step S2: The motor drives one of the gears to rotate, and the motor speed is N, so that the rotating gear rotates clockwise, and the gear meshed with it rotates counterclockwise. After the motor is driven at this speed for a period of time, the input power and measurement of the driving motor The output power of the dynamometer is kept stable, the input torque is measured as Tin, the dynamometer is installed on another gear, and the output torque Tout of the dynamometer is measured;

Step S3: After the measurement is completed, turn off the motor without changing the position of the gear teeth 102, restart the motor, make the motor rotate in the reverse direction, the speed is still N, and then measure the input torque of the motor as Tin, and the output torque of the dynamometer motor is Tout;

The power loss of the required gear meshing transmission is P=(Tin-Tout)·N÷9550.

If you want to measure the effect of different gear sets on the power loss of a meshing drive, insert a cogging slot in the selected cogging slot before starting the motor, and then measure as described above. In order to ensure that the gears can be fully meshed, the center distance of each gear set is equal. For example, when one wheel 101 selects the outermost gear slot, the other wheel 101 should select the innermost gear slot; when selecting the secondary outer gear slot, the other should select the secondary inner gear slot, so as to analogy.

The method provided in this embodiment can measure gears with various numbers of teeth, so as to conveniently obtain the power loss of various gears during the transmission process.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. a device for measuring gear transmission loss rate, is characterized in that, comprises motor, dynamometer motor, rotational speed torque sensor and two gears, and described gear comprises wheel disc and a plurality of gear teeth, and described wheel disc is provided with a central hole and a plurality of mounting rings, a plurality of the mounting rings are arranged at intervals along the radial direction of the wheel disc, the mounting rings are arranged coaxially with the central hole, and each of the mounting rings includes a plurality of mounting holes, A plurality of the gear teeth are respectively installed in the plurality of the mounting holes, and the working end of the gear teeth protrudes from the surface of the wheel disc; the two gears are meshed, and the output end of the motor passes the rotational speed A torque sensor is connected with one of the gears, and the other gear is connected with the dynamometer motor through the rotational speed torque sensor; the gear teeth include a mounting end and the working end, and the mounting end and the The working end is arranged vertically, the shape of the cross section of the mounting end is the same as that of the mounting hole, the mounting end is clamped to the mounting hole, and the working end protrudes from the surface of the wheel disc, And a plurality of the gear teeth are located on the same side of the wheel disc. 2 . The device for measuring gear transmission loss rate according to claim 1 , wherein the axis line of the mounting hole is arranged in parallel with the axis line of the center hole, and the cross section of the mounting hole is not 2 . round. 3 . The device for measuring gear transmission loss rate according to claim 2 , wherein the cross section of the mounting hole is rectangular. 4 . 4 . The device for measuring gear transmission loss rate according to claim 1 , wherein the wheel disc comprises a mounting surface and a driving surface, the gear teeth are located on the mounting surface, and the rotational speed torque sensor is located on the a driving surface, the mounting hole is provided with a first inclined surface, the first inclined surface is inclined inward along the direction of the mounting surface toward the driving surface, the mounting end is provided with a second inclined surface, and the second inclined surface Inclined inwardly in a direction away from the working end. 5 . The device for measuring gear transmission loss rate according to claim 4 , wherein the inclination angle of the first inclined plane is smaller than the inclination angle of the second inclined plane. 6 . 6 . The device for measuring gear transmission loss rate according to claim 1 , wherein the installation end comprises a positioning rod and two elastic pieces, the two elastic pieces are respectively located on both sides of the positioning rod, and the elastic pieces There is a tendency to move away from the positioning rod. 7 . The device for measuring gear transmission loss rate according to claim 6 , wherein the elastic piece comprises an elastic part and a clamping part, one end of the elastic part is connected with the working end, and the other end of the elastic part is connected with the working end. 8 . One end is connected to the clip portion, and the clip portion is located on the side of the elastic portion away from the other elastic portion. 8 . The device for measuring gear transmission loss rate according to claim 1 , wherein the gear further comprises a magnet, the magnet is circular, the magnet is mounted on the wheel disc, and the mounting end abuts against the mounting end. 9 . on the magnet. 9. A measuring method according to any one of claims 1-8, characterized in that, comprising the steps of: Step S1: Confirm the gear set to be measured, respectively install the gear teeth in the mounting holes on the corresponding mounting ring, so that the two gears are fully meshed; Step S2: the motor drives one of the gears to rotate, measures the input torque of the motor, installs a dynamometer motor on the other gear, and measures the output torque of the dynamometer motor; Step S3: After the measurement is completed, restart the motor to make the motor rotate in the reverse direction, and then measure the input torque of the motor and the output torque of the dynamometer motor; When one of the roulettes selects the outermost gear groove, the other roulette should select the innermost gear groove; when selecting the secondary outer ring gear groove, the other should select the secondary inner ring gear groove, so that each gear should select the innermost gear groove. The center-to-center distances of the groups are all equal to ensure that the gears can be fully meshed.

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