A method and device for measuring the load distribution of a differential planetary gear train

Abstract

The present invention relates to the field of measurement and testing technology, and more particularly to a method and device for measuring the load distribution of a differential planetary gear train. The differential planetary gear train load distribution testing method provided by the present invention arranges measuring points on a planetary carrier. Because the front end of the planetary carrier is a large flat surface and allows for visual operation, a three-dimensional coordinate measuring instrument can be used to accurately locate the location where strain gauges are attached, making the strain gauge attachment operation effortless and ensuring test accuracy. A single telemetry device with wireless connection solves the problem of line rotation and saves costs compared to measuring the sun gear and inner ring gear, which requires two transmission devices. Furthermore, the use of a telemetry device minimizes structural changes to the reducer, making this method more economical.

Description

Technical Field

[0001] The present invention relates to the field of measurement and detection technology, and in particular to a method and device for measuring the load distribution of a differential planetary gear train. Background Art

[0002] Differential planetary gear trains are widely used in fields such as petrochemicals, engineering machinery, papermaking, sewage treatment, wind power, and aerospace. They can be used for speed synthesis and decomposition or for variable speed transmission, leading to their increasing application. A differential planetary gear train primarily consists of a sun gear, planetary gears, a planetary carrier, and a ring gear. Speed ​​is input from the sun gear, which meshes with multiple planetary gears to achieve power distribution. The planetary gears then drive the inner ring gear and planetary carrier, which are connected to the inner and outer propeller shafts, respectively, to achieve coaxial counter-rotating output.

[0003] Due to the inevitable errors in the manufacturing and assembly of gear trains, ideal power distribution in differential planetary gear trains is difficult to achieve, leading to unbalanced loads in differential planetary gear trains. Therefore, it is necessary to test the load-sharing performance of differential planetary gear trains to provide feedback and guidance for gear train design, processing, and assembly.

[0004] There are many testing schemes in the prior art.

[0005] Option 1:

[0006] Test solution 1 uses the method of measuring the strain of the inner ring gear and the sun gear root, such as Figure 1 As shown in the figure, there are four planetary gears, so four measuring points are evenly distributed on the inner ring gear and the sun gear. By comparing the strains between the inner ring gear R11, R12, R13, and R14 and the strains between the sun gears T11, T12, T13, and T14, the load distribution between the planetary gears can be obtained.

[0007] Option 2

[0008] Use micro resistance strain gauges to measure the stress of each planetary axle. Cut a concave ring groove in the middle of the planetary axle and stick two resistance strain gauges in the ring groove on each axle to eliminate the influence of temperature change on the test results. The installation position of the strain gauge on the planetary axle is as follows: Figure 2 As shown, by measuring the bending deformation of each planetary gear, the load condition of each planetary gear shaft can be indirectly obtained, reflecting the load balancing effect of the reducer.

[0009] The above-mentioned prior art has the following defects:

[0010] 1) Option 1 uses a large number of strain gauges; the strain gauges are pasted on the tooth root. The tooth root space is small and curved, which makes pasting difficult and prone to errors. Micro strain gauges are required. Moreover, when the module of the gear is small, the tooth root space is not sufficient to meet the conditions for pasting strain gauges.

[0011] 2) Option 2: The inner hole of the planetary gear shaft is an arc surface. It is difficult to determine the pasting position of the inner hole of the planetary gear shaft. In addition, when pasting the strain gauge, it is easy to lose sight of the pasting position, which can easily lead to blind pasting, resulting in inaccurate pasting position and direction, and causing test errors.

[0012] Regarding the above solution, the existing wiring adopts a slip ring electrical wiring solution, which has wiring layout difficulties and requires significant changes to the tested component.

[0013] In summary, the large number of strain gauges used makes pasting difficult or impossible, and the pasting position and direction are inaccurate, which leads to test errors and significant changes to the tested specimens. Summary of the Invention

[0014] In response to the above problems, the present invention provides a differential planetary gear train load-balanced measurement method and device, which is used to solve the problems of using a large number of strain gauges, difficulty or inability to paste them, inaccurate pasting position and direction, resulting in test errors and large changes to the tested specimens.

[0015] A method for measuring load sharing of a differential planetary gear train, the method comprising:

[0016] A telemetry device is used to collect strain signal data from strain gauges attached to the pressure-bearing side of each planetary gear shaft hole near one end of the planetary carrier of the differential planetary gear train and transmit the data to a strain gauge; the strain gauge processes the obtained strain signal data to obtain the load distribution status of the differential planetary gear train.

[0017] Furthermore, the strain gauge pasting position on the planetary frame is precisely positioned using a three-coordinate measuring machine.

[0018] Furthermore, each working strain gauge and three strain gauges attached to the compensation block form a Wheatstone full bridge to perform temperature compensation and suppress common-mode signals.

[0019] Furthermore, the telemetry device is connected to the strain gauge through a lead, and the collected strain signal data is amplified by the amplifier and then transmitted through the rotor antenna. The receiving antenna receives the strain signal data and transmits it to the strain gauge.

[0020] Furthermore, the strain gauge divides the maximum value of all strain data of the received strain signal data by the average value of the maximum strain data of each strain gauge as the load sharing coefficient. The load sharing condition of the differential planetary gear train is determined based on the load sharing coefficient. The formula is as follows: where ε i is the maximum value of the strain data of measuring point i in one meshing cycle, n is the number of strain data collected, n is a positive integer, ε 平均 is ε i The average value of .

[0021] Furthermore, the pasting position of each strain gauge is consistent with the planetary gear shaft hole, and the number of strain gauges is consistent with the number of planetary gears.

[0022] A differential planetary gear train load-sharing measurement device comprises: a strain gauge, a telemetry device and a strain gauge;

[0023] Strain gauges are used to measure stress changes and are attached to the pressure-bearing side of each planetary gear shaft hole at one end of the planetary carrier.

[0024] Telemetry device, used to collect strain signal data from the strain gauge and transmit it to the strain meter;

[0025] The strain gauge is used to process the obtained strain signal data to obtain the load distribution condition of the differential planetary gear train.

[0026] Furthermore, the strain gauge pasting position is precisely located by a three-coordinate measuring machine.

[0027] Furthermore, each working strain gauge and three strain gauges attached to the compensation block form a Wheatstone full bridge to perform temperature compensation and suppress common-mode signals.

[0028] Furthermore, the telemetry device includes an amplifier and a rotor antenna arranged at the other end of the planetary frame where the strain gauge is pasted. The amplifier is connected to the strain gauge lead. The telemetry device collects strain signal data, which is amplified by the amplifier and then transmitted through the rotor antenna. The receiving antenna receives the strain signal data and transmits it to the strain gauge.

[0029] Furthermore, the strain gauge obtains the load sharing condition of the differential planetary gear train by dividing the maximum value of all data in the strain gauge measurement information by the average value of the maximum data of each strain gauge as the load sharing coefficient.

[0030] Furthermore, the pasting position of each strain gauge is consistent with the planetary gear shaft hole, and the number of strain gauges is consistent with the number of planetary gears.

[0031] This invention provides a method for measuring the load distribution of a differential planetary gear train. A three-dimensional coordinate measuring machine is used to precisely locate the strain gauge attachment points. Each working strain gauge and three strain gauges attached to a compensation block form a Wheatstone full-bridge to perform temperature compensation and suppress common-mode signals. A telemetry device is used to collect and transmit strain signals. A measuring point is placed at one end of the planetary carrier, and an amplifier and rotor antenna are located at the other end. The signal is transmitted to the strain gauge via a receiving antenna. The stress test results are processed to reflect the load distribution of the differential planetary gear train.

[0032] The differential planetary gear train load-balanced testing method provided in the present invention arranges measuring points on the planetary carrier. Since the front end of the planetary carrier is a large flat surface and can be operated visually, a three-coordinate measuring instrument can be used to accurately locate the strain gauge pasting position, and the strain gauge pasting operation is not difficult, thereby ensuring the accuracy of the test; a set of telemetry devices is used with wireless connection to solve the line rotation problem, which saves costs compared to measuring the sun gear and the inner ring gear, which requires two sets of transmission devices; and the use of the telemetry device requires little structural change to the reducer, making this method more economical.

[0033] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 A schematic diagram of a prior art test solution is shown.

[0036] Figure 2 A schematic diagram of a second prior art test solution is shown.

[0037] Figure 3 A schematic diagram of a compensation block according to an embodiment of the present invention is shown.

[0038] Figure 4 FIG. 2 shows a schematic diagram of a Wheatstone full bridge according to an embodiment of the present invention.

[0039] Figure 5 A schematic diagram showing the positions of strain gauges in a differential planetary gear train according to an embodiment of the present invention is shown.

[0040] Figure 6A schematic diagram of the position of a differential planetary gear train amplifier according to an embodiment of the present invention is shown.

[0041] Figure 7 A schematic diagram of a differential planetary gear train according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0043] In the field of mechanics, due to the inevitable errors in the manufacturing and assembly of gear trains, ideal power distribution in differential planetary gear trains is difficult to achieve, leading to unbalanced loads in differential planetary gear trains. Therefore, it is necessary to test the load-sharing performance of differential planetary gear trains to provide feedback and guidance for gear train design optimization and processing and assembly.

[0044] The existing technology has problems such as the large number of strain gauges used, difficulty or inability to paste, inaccurate pasting position and direction, resulting in test errors, and major changes to the tested specimen.

[0045] To this end, the present invention proposes a differential planetary gear train load-sharing measurement method and device, including a differential planetary gear train load-sharing measurement method and a differential planetary gear train load-sharing measurement device.

[0046] The differential planetary gear train load-balanced testing method provided in the present invention includes arranging measuring points on the planetary carrier. Since the front end of the planetary carrier is a large flat surface and can be operated visually, a three-coordinate measuring instrument can be used to accurately locate the strain gauge pasting position, and the strain gauge pasting operation is not difficult, thereby ensuring the accuracy of the test; a set of telemetry devices is used with wireless connection to solve the line rotation problem, which saves costs compared to measuring the sun gear and the inner ring gear, which requires two sets of transmission devices; and the use of the telemetry device requires little structural change to the reducer, making this method more economical.

[0047] In a first aspect, the present invention provides a method for measuring load sharing of a differential planetary gear train, the method comprising:

[0048] A telemetry device is used to collect strain signal data from strain gauges attached to the pressure-bearing side of each planetary gear shaft hole near one end of the planetary carrier of the differential planetary gear train and transmit the data to a strain gauge; the strain gauge processes the obtained strain signal data to obtain the load distribution status of the differential planetary gear train.

[0049] During specific implementation, the structural changes to the tested piece are small, the cost is low, and the method is more economical and feasible.

[0050] In this embodiment, the attachment position of the strain gauge on the planetary carrier is precisely positioned by a three-coordinate measuring machine.

[0051] During the specific implementation, measuring points are arranged on the planetary frame. Since the front end of the planetary frame is a large flat surface and can be operated visually, a three-coordinate measuring instrument can be used to accurately locate the position where the strain gauge is pasted. The operation of pasting the strain gauge is not difficult, thus ensuring the accuracy of the test.

[0052] In this embodiment, each working strain gauge and three strain gauges attached to the compensation block form a Wheatstone full bridge to perform temperature compensation and suppress common mode signals.

[0053] In practice, a compensation block is added near each measurement point. Three strain gauges are attached to one side of the compensation block, forming a Wheatstone full-bridge measurement with the planet carrier's working plate. These three strain gauges only perform temperature compensation and suppress common-mode signals generated in the test circuit; they do not deform under load. The compensation block is secured to the planet carrier using a combination of highly thermally conductive silicone and structural adhesive, maintaining temperature consistency with the planet carrier without transmitting any load.

[0054] In this embodiment, an amplifier and a rotor antenna are arranged on the other end of the planetary carrier to which the strain gauge is attached. A telemetry device is connected to the strain gauge via a lead. The telemetry device collects strain signal data, which is amplified by the amplifier and then transmitted through the rotor antenna. The receiving antenna receives the strain signal data and transmits it to the strain gauge.

[0055] In practice, the strain gauge leads are passed through holes in the planetary carrier support plate to the other side of the planetary carrier. These leads are then connected to an amplifier mounted on the other side of the planetary carrier. The amplifier is then connected to a rotor antenna mounted on the planetary carrier, transmitting the strain gauge measurement information via radio frequency signals. The amplifier, strain gauge, and leads are stationary relative to the planetary carrier, with no relative motion. The casing is a stationary component, and a receiving antenna is placed on the casing to receive the strain gauge measurement information. The receiving antenna leads are then connected to a strain gauge for data processing, resulting in the strain values ​​of all the strain gauges.

[0056] The present invention adopts one set of telemetry devices with wireless connection, which solves the problem of line rotation and saves costs compared with measuring the sun gear and the inner ring gear, which requires two sets of transmission devices. Moreover, the use of the telemetry device in this method requires little structural change to the reducer, which is more economical.

[0057] In this embodiment, the strain gauge divides the maximum value of all strain data of the received strain signal data by the average value of the maximum strain data of each strain gauge as the load sharing coefficient. The load sharing condition of the differential planetary gear train is determined based on the load sharing coefficient. The formula is as follows: where εi is the maximum value of the strain data of measuring point i in one meshing cycle, n is the number of strain data collected, n is a positive integer, ε 平均 is ε i The average value of .

[0058] In this embodiment, the attachment position of each strain gauge is consistent with the planetary gear shaft hole, and the number of strain gauges is consistent with the number of planetary gears.

[0059] During specific implementation, the strain gluing position is determined according to the force conditions of the gear train meshing, and strain gauges are pasted on the pressure side near each planetary gear shaft hole at one end of the planetary carrier. The gluing position of each strain gauge is consistent with the planetary gear shaft hole, and the number of strain gauges is consistent with the number of planetary gears. The gluing position is precisely positioned using a three-coordinate measuring machine.

[0060] Through precise positioning by three-coordinate instruments, the pasting position of each strain gauge is kept consistent relative to the planetary gear shaft hole, and the position of the strain gauge remains axially symmetrical, which reduces the influence of the weight of the strain gauge itself on the differential planetary gear system and improves the test accuracy.

[0061] In a second aspect, the present invention provides a differential planetary gear train load-sharing measurement device, comprising: a strain gauge, a telemetry device, and a strain gauge;

[0062] Strain gauges are used to measure stress changes and are attached to the pressure-bearing side of each planetary gear shaft hole at one end of the planetary carrier.

[0063] Telemetry device, used to collect strain signal data from the strain gauge and transmit it to the strain meter;

[0064] The strain gauge is used to process the obtained strain signal data to obtain the load distribution condition of the differential planetary gear train.

[0065] In this embodiment, the strain gauge pasting position is precisely positioned by a three-coordinate measuring machine.

[0066] In this embodiment, each working strain gauge and three strain gauges attached to the compensation block form a Wheatstone full bridge to perform temperature compensation and suppress common mode signals.

[0067] In this embodiment, the telemetry device includes an amplifier and a rotor antenna arranged at the other end of the planetary carrier to which the strain gauge is attached. The amplifier is connected to the strain gauge lead. The telemetry device collects strain signal data, which is amplified by the amplifier and then transmitted through the rotor antenna. The receiving antenna receives the strain signal data and transmits it to the strain gauge.

[0068] In this embodiment, the strain gauge performs post-processing on the strain gauge measurement information, and takes the maximum value of all data divided by the average value of the maximum data of each strain gauge as the load sharing coefficient, thereby obtaining the load sharing condition of the differential planetary gear train.

[0069] In this embodiment, the attachment position of each strain gauge is consistent with the planetary gear shaft hole, and the number of strain gauges is consistent with the number of planetary gears.

[0070] In order to enable those skilled in the art to better understand the present invention, the principles of the present invention are described as follows with reference to the accompanying drawings:

[0071] The present invention determines the strain pasting position according to the force conditions of the gear train meshing, and pastes strain gauges on the pressure side near each planetary gear shaft hole at the planetary end. The pasting position of each strain gauge remains consistent relative to the planetary gear shaft hole, and the number of strain gauges is consistent with the number of planetary gears. The pasting position is precisely positioned using a three-coordinate measuring instrument.

[0072] A compensation block is added near each measuring point. Made of material with the same linear expansion coefficient as the test specimen, the compensation block is attached to one side of the compensation block. Together with the planetary carrier's working plate (attached to the measuring point, i.e., strain gauge 1), it forms a Wheatstone full-bridge measurement. These three compensation strain gauges provide temperature compensation and suppress common-mode signals generated in the test circuit, without deforming under load. The compensation block is secured to the planetary carrier using a combination of highly thermally conductive silicone and structural adhesive, maintaining a consistent temperature with the planetary carrier without transmitting load. The Wheatstone full-bridge generates four nodes: P-, S-, S+, and P+. (P+ corresponds to voltage excitation +, P- corresponds to voltage excitation -, providing a stable excitation voltage for the Wheatstone bridge; S+ corresponds to signal +, S- corresponds to signal -, outputting the voltage signal from the Wheatstone bridge.) These are then connected to the corresponding P-, S-, S+, and P+ pins of the telemetry amplifier.

[0073] As shown in Figure 3, the compensation block diagram shows the specific connection relationship of the strain gauges. The 1# working sheet is connected to the A node of the 2# compensation sheet through L1, and the 1# working sheet is connected to the B node of the 4# compensation sheet through L2. The connection point P+ is drawn between the strain gauge 1# and the compensation strain gauge 2#, the connection point S+ is drawn between the compensation strain gauge 2# and the compensation strain gauge 3#, the connection point P- is drawn between the compensation strain gauge 3# and the compensation strain gauge 4#, and the connection point S- is drawn between the strain gauge 1# and the compensation strain gauge 4#. Figure 4 The figure shows a schematic diagram of a Wheatstone full bridge. The Wheatstone full bridge includes the connected working strain gauge 1#, compensation strain gauge 2#, compensation strain gauge 3#, and compensation strain gauge 4#. Connection point P+ is connected between strain gauge 1# and compensation strain gauge 2#, connection point S+ is connected between compensation strain gauge 2# and compensation strain gauge 3#, connection point P- is connected between compensation strain gauge 3# and compensation strain gauge 4#, and connection point S- is connected between strain gauge 1# and compensation strain gauge 4#. The four nodes P-, S-, S+, and P+ of the compensation block correspond to those of the Wheatstone full bridge.

[0074] Paste the strain gauge according to the strain gauge pasting requirements, and pass the strain gauge lead through the hole of the planet carrier support plate to the other side of the planet carrier;

[0075] The strain gauge leads are connected to an amplifier mounted on the other side of the planetary frame. The amplifier is connected to a rotor antenna mounted on the planetary frame. When the strain gauge is deformed by force, it emits an electrical signal reflecting the deformation information. The electrical signal is transmitted as strain information data via a radio frequency signal. The amplifier, strain gauge, and leads are stationary relative to the planetary frame, and there is no relative motion.

[0076] The casing is a stationary part, and a receiving antenna is arranged on the casing to receive the measurement information of the strain gauge;

[0077] The receiving antenna is connected to the strain gauge to process the data and obtain all the strain gauge strain signal data used for measurement;

[0078] By post-processing the strain signal data, the maximum value of all data is divided by the average value of the maximum data of each strain gauge as the load sharing coefficient, thereby reflecting the load sharing condition of the differential planetary gear train.

[0079] like Figure 5 As shown, strain gauges are attached to the pressure side of each planetary gear shaft hole near the planetary carrier. The attachment position of each strain gauge is consistent with the planetary gear shaft hole, and the number of strain gauges is consistent with the number of planetary gears. Figure 6 As shown in the figure, the amplifier is set at the other end of the planetary frame where the strain gauge is attached. The amplifier and the strain gauge are connected through the strain gauge lead. The amplifier is connected to the rotor antenna installed on the planetary frame to transmit the strain gauge measurement information through the radio frequency signal. The receiving antenna is connected to the casing to receive the strain gauge measurement information and transmit it to the strain gauge. Figure 3 A method of mounting the strain gauge in the compensation block, with the gauge closer to the large hole and farther from the small hole, and the gauge and amplifier on different sides of the planetary carrier. Alternatively, the gauge and amplifier can be swapped. The rotor antenna is located on the outer edge of the planetary carrier, and the receiving antenna is located in the stationary housing outside the planetary carrier.

[0080] Figure 7 This is a side view of the differential planetary gear system, which is mainly composed of a sun gear, planetary gears, a planetary carrier and an inner ring gear. The speed is input from the sun gear and meshes with multiple planetary gears to achieve power diversion. The planetary gears then drive the inner ring gear and the planetary carrier to work. The planetary carrier and the inner ring gear are respectively connected to the inner propeller shaft and the outer propeller shaft for output.

[0081] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for measuring load sharing of a differential planetary gear train, the method comprising: A telemetry device is used to collect strain signal data from a strain gauge attached to the pressure-bearing side of each planetary gear shaft hole near one end of the planetary carrier of the differential planetary gear train and transmit the data to a strain gauge; the strain gauge processes the obtained strain signal data to obtain the load distribution status of the differential planetary gear train; The strain gauge attachment position on the planetary carrier is precisely positioned by a three-coordinate measuring machine; The telemetry device is connected to the strain gauge through a lead wire, collects the strain signal data, amplifies it through the amplifier, and then transmits it through the rotor antenna. The receiving antenna receives the strain signal data and transmits it to the strain gauge; The strain gauge divides the maximum value of all strain data of the received strain signal data by the average value of the maximum strain data of each strain gauge as the load sharing coefficient. The load sharing condition of the differential planetary gear train is determined based on the load sharing coefficient. The formula is as follows: , , where ε i is the maximum value of the strain data of measuring point i in one meshing cycle, n is the number of strain data collected, n is a positive integer, ε 平均 is ε i The average value of .

2. A differential planetary gear train load sharing measurement method according to claim 1, characterized in that: Each working strain gauge and three strain gauges attached to the compensation block form a Wheatstone full bridge to perform temperature compensation and suppress common mode signals.

3. A differential planetary gear train load sharing measurement method according to claim 1 or 2, characterized in that: The pasting position of each strain gauge is consistent with the planetary gear shaft hole, and the number of strain gauges is consistent with the number of planetary gears.

4. A differential planetary gear train load-sharing measurement device, comprising: strain gauges, telemetry devices, and strain gauges; Strain gauges are used to measure stress changes and are attached to the pressure-bearing side of each planetary gear shaft hole at one end of the planetary carrier. Telemetry device, used to collect strain signal data from the strain gauge and transmit it to the strain meter; The strain gauge is used to process the obtained strain signal data to obtain the load distribution condition of the differential planetary gear train; The strain gauge attachment position on the planetary carrier is precisely positioned by a three-coordinate measuring machine; The telemetry device is connected to the strain gauge through a lead wire, collects the strain signal data, amplifies it through the amplifier, and then transmits it through the rotor antenna. The receiving antenna receives the strain signal data and transmits it to the strain gauge; The strain gauge divides the maximum value of all strain data of the received strain signal data by the average value of the maximum strain data of each strain gauge as the load sharing coefficient. The load sharing condition of the differential planetary gear train is determined based on the load sharing coefficient. The formula is as follows: , , where ε i is the maximum value of the strain data of measuring point i in one meshing cycle, n is the number of strain data collected, n is a positive integer, ε 平均 is ε i The average value of .

5. The differential planetary gear train load-sharing measurement device according to claim 4, characterized in that: Each working strain gauge and three strain gauges attached to the compensation block form a Wheatstone full bridge to perform temperature compensation and suppress common mode signals.

6. The differential planetary gear train load-sharing measurement device according to claim 4, characterized in that: The telemetry device includes an amplifier and a rotor antenna arranged at the other end of the planetary frame where the strain gauge is attached. The amplifier is connected to the strain gauge lead. The telemetry device collects strain signal data, amplifies it by the amplifier, and then transmits it through the rotor antenna. The receiving antenna receives the strain signal data and transmits it to the strain gauge.

7. A differential planetary gear train load sharing measurement device according to any one of claims 4 to 6, characterized in that: The pasting position of each strain gauge is consistent with the planetary gear shaft hole, and the number of strain gauges is consistent with the number of planetary gears.

Images