Split type planet carrier shaft tooth connection part bearing test tool

Abstract

The utility model provides a split type planet carrier shaft gear connection part bearing test tool. The split type planet carrier shaft gear connection part bearing test tool comprises a planet carrier positioning mechanism, a gear shaft positioning mechanism and a torque wrench, the planet carrier positioning mechanism comprises a bearing test fixing plate and a bearing test positioning piece; the gear shaft positioning mechanism comprises an inner gear ring sleeve, the left end of the inner gear ring sleeve is open, the right end of the inner gear ring sleeve is provided with an end face, the inner circumferential face of the left opening of the inner gear ring sleeve is provided with teeth matched with teeth of the middle gear shaft, and the right end face is provided with a wrench connector. And the torque wrench is in transmission connection with the inner gear ring sleeve through the wrench interface during testing. The utility model provides a split type planet carrier shaft gear connection part bearing test tool, which is used for respectively positioning a split type planet carrier and a middle gear shaft, and providing stable load by using a torque wrench, so that test data is effective and reliable, and the split type planet carrier shaft gear connection part can be subsequently and optimally designed according to the test data.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology, and in particular to a load-bearing test tooling for the split planetary carrier shaft gear connection part. Background Technology

[0002] The planet carrier is a key component in planetary gear transmissions. It supports the planetary gears, enabling them to rotate on their own axes while also revolving around the sun gear. The structural design and manufacturing quality of the planet carrier have a significant impact on the load-bearing capacity, noise, and vibration performance of the entire transmission.

[0003] In the production and assembly of a split planetary carrier, an intermediate gear shaft is fixedly connected to one end of the planetary carrier. The outer circumferential surface of the intermediate gear shaft has teeth, through which power is transmitted. The split planetary carrier and the intermediate gear shaft are typically fixedly connected by pins or flat keys. The reliability of the connection between the planetary carrier and the intermediate gear shaft directly affects the system stability and reliability of the entire planetary gear transmission. In the production design, it is necessary to conduct load-bearing capacity tests on the integrally formed split planetary carrier and intermediate gear shaft to ensure the reliability of the transmission system. Load-bearing capacity tests can also verify the stability and durability of the connection structure composed of the split planetary carrier and intermediate gear shaft under design loads.

[0004] In the design of load-bearing test fixtures for a split planetary carrier and intermediate gear shaft structure, effective clamping and positioning of the split planetary carrier and intermediate gear shaft are necessary. During positioning of the intermediate gear shaft, due to the toothed outer circumference, a simple clamping mechanism can easily cause deformation or damage to the toothed surface when clamping and transmitting large loads. This damage can easily obstruct the planetary transmission at that location, preventing the proper and effective load distribution among the planetary gear components and hindering the acquisition of accurate test data.

[0005] Therefore, it is necessary to further design the load-bearing test fixture to address this situation, so that it can effectively position the split planetary support and the intermediate gear shaft without affecting the tooth profile of the intermediate gear shaft, thus facilitating the acquisition of reliable and effective load-bearing data. Utility Model Content

[0006] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the prior art, this utility model provides a load-bearing test fixture for the split planetary carrier shaft-tooth connection part, which can effectively position the split planetary carrier and effectively cooperate with the teeth of the intermediate gear shaft. Without damaging the tooth profile on the surface of the intermediate gear shaft, it can effectively transmit torque and facilitate load-bearing tests on the split planetary carrier.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: a load-bearing test fixture for the split planetary carrier shaft-tooth connection part, used to test the assembled split planetary carrier and intermediate gear shaft. The intermediate gear shaft is fixed to the right end of the split planetary carrier, and the outer circumferential surface of the intermediate gear shaft is distributed with teeth. The load-bearing test fixture includes a planetary carrier positioning mechanism, a gear shaft positioning mechanism, and a torque wrench. The planetary carrier positioning mechanism includes a load-bearing test fixing plate and a load-bearing test positioning component. The load-bearing test fixing plate has a first boss protruding from it. The outer circumferential surface of the first boss has an external thread. The load-bearing test positioning component is a sleeve structure. One inner wall of the sleeve structure has an internal thread adapted to the external thread. The left end of the split planetary carrier is radially positioned and engaged with the second boss. The sleeve structure of the load-bearing test positioning component extends inward to the end away from the internal thread, and has an inner edge. The load-bearing test positioning component covers the split planetary carrier and axially limits the split planetary carrier and the first boss through the inner edge. The gear shaft positioning mechanism includes an internal gear ring sleeve, which has an opening at the left end and an end face at the right end. The inner circumferential surface of the opening on the left side of the internal gear ring sleeve has teeth that mesh with the tooth profile of the intermediate gear shaft, and a wrench interface is provided on the end face at the right end. The torque wrench is connected to the internal gear ring sleeve through the wrench interface during testing.

[0008] In the above scheme, the left end of the split planetary carrier is positioned by the cooperation of the load test fixing plate and the load test positioning component. The middle gear shaft located at the right end of the split planetary carrier is engaged by the internal gear ring sleeve. The tooth profile design of the internal gear ring sleeve completes the connection and engagement with the middle gear shaft, avoiding the connection operation from affecting the tooth profile of the gear shaft. On the other hand, the tooth profile engagement makes the connection tighter and more reliable. A torque wrench is connected to the internal gear ring sleeve by a wrench interface, and the torque wrench can be used to output a stable, reliable and controllable load to the test fixture.

[0009] Furthermore, the end of the first boss that connects to the load-bearing test fixing plate is circumferentially recessed and has a first journal. The external thread is provided on the circumferential section of the first boss located on the right side of the first journal. The first journal provides space for the connection of the load-bearing test positioning component, avoiding excessive thread fit and interference with the load-bearing test fixing plate.

[0010] Furthermore, the end of the second boss connected to the first boss is circumferentially recessed inward to form a second journal, and the inner wall of the left end of the split planetary carrier is fitted over the section of the second boss located to the right of the second journal. The second journal facilitates the positioning of the split planetary carrier fitted over the second boss, while preventing the left end face of the split planetary carrier from contacting the end face of the first boss when it mates with the second boss.

[0011] Furthermore, the wrench interface is coaxially arranged with the intermediate gear shaft. This coaxial wrench interface facilitates load input to the torque wrench from the axial position, ensuring stable and evenly distributed load input.

[0012] Furthermore, the left end opening of the internal gear ring sleeve and the inner wall of the sleeve, which mates with the right end face, form a chamber for the intermediate gear shaft to engage. This chamber, from left to right, includes a mating section and an empty section. The inner wall of the sleeve corresponding to the mating section has teeth that mate with the tooth profile of the intermediate gear shaft. The diameter of the inner wall of the sleeve corresponding to the empty section is larger than the tip circle diameter of the tooth profile of the intermediate gear shaft. The design of the empty section provides a certain amount of space on the right side of the chamber for the mating of the internal gear ring sleeve and the intermediate gear shaft. The right end face of the intermediate gear shaft will not contact or interfere with the right end face of the internal gear ring sleeve. When the torque wrench is connected through the wrench interface, it also avoids contact between the torque wrench and the right end face of the intermediate gear shaft, thus preventing unnecessary interference.

[0013] Preferably, the mating section and the inner circumferential surface of the empty section are connected by a slope transition.

[0014] The beneficial effects of this utility model are that the load-bearing test fixture for the split planetary carrier shaft-tooth connection provided by this utility model has a reasonable structural design. A fixing plate and a positioning component are used for frictional engagement at the outer end of the split planetary carrier to position it. An internal gear ring sleeve is designed outside the intermediate gear shaft. This internal gear ring sleeve effectively engages with the tooth profile of the intermediate gear shaft and also includes a wrench interface for easy connection with a torque wrench, facilitating the provision of stable and reliable torque to the intermediate gear shaft during load testing. Through the design of this load-bearing test fixture, the split planetary carrier and the intermediate gear shaft can be positioned separately, and a torque wrench can provide a stable load, ensuring effective and reliable test data. This facilitates subsequent optimization of the split planetary carrier shaft-tooth connection design based on the test data. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the preferred embodiment of the present invention.

[0017] In the figure: 1. Load test fixing plate; 2. First journal; 3. First boss; 4. Load test positioning piece; 5. Second journal; 6. Second boss; 7. Split planetary carrier; 8. Intermediate gear shaft; 9. Mating section; 10. Inclined surface; 11. Empty section; 12. Internal gear ring sleeve; 13. Wrench interface; 14. Inner edge. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention. Therefore, they only show the components relevant to the present invention. Orientations and references (e.g., up, down, left, right, etc.) are only used to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be restrictive, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0019] like Figure 1 The test fixture shown is a preferred embodiment of this utility model, representing the bearing capacity test of the split planetary carrier shaft-tooth connection. This test fixture is used to test the assembled split planetary carrier 7 and intermediate gear shaft 8. Specifically, the assembled split planetary carrier 7 and intermediate gear shaft 8 are connected and fixed to the right end of the split planetary carrier 7 by a locating pin. The outer circumferential surface of the intermediate gear shaft 8 has teeth. The outer circumferential surface of the left end of the split planetary carrier 7 has a stepped structure formed by a diameter change, according to design requirements. In this embodiment, the test fixture, during the positioning of the split planetary carrier 7, achieves frictional engagement through the right end face of the leftmost stepped structure.

[0020] Specifically, such as Figure 1 As shown, the load-bearing test fixture includes a planetary carrier positioning mechanism, a gear shaft positioning mechanism, and a torque wrench.

[0021] The planetary carrier positioning mechanism includes a load test fixing plate 1 and a load test positioning component 4.

[0022] The positioning on the left side of the split planetary carrier 7 is achieved through a boss structure. A first boss 3 protrudes from the load-bearing test fixing plate 1, and the outer circumferential surface of the first boss 3 has external threads. The load-bearing test positioning component 4 has a sleeve structure, and one inner wall of the sleeve structure has an internal thread adapted to the external thread. A second boss 6 protrudes from the first boss 3, and the left side of the split planetary carrier 7 is fitted onto the circumferential outer wall of the second boss 6. An overfit can be used between the split planetary carrier 7 and the second boss 6 during the fit between the second boss 6 and the split planetary carrier 7. During the fit between the left side of the split planetary carrier 7 and the load-bearing test fixing plate 1, the end of the first boss 3 connected to the load-bearing test fixing plate 1 has a first journal 2 recessed circumferentially, and the external thread is provided on the circumferential section of the first boss 3 located to the right of the first journal 2. The end of the second boss 6 connected to the first boss 3 has a second journal 5 recessed circumferentially, and the inner wall of the left side of the split planetary carrier 7 is fitted onto the section of the second boss 6 located to the right of the second journal 5. The first journal 2 provides space for the connection of the load-bearing test positioning component 4, preventing excessive thread fit and interference with the load-bearing test fixing plate 1. The second journal 5 facilitates the positioning of the split planetary carrier 7 outside the second boss 6, while preventing the left end face of the split planetary carrier 7 from contacting the end face of the first boss 3 when it mates with the second boss 6. By setting up two journals, the interference that may be caused by the mating of the split planetary carrier 7 and the load-bearing test fixing plate 1 can be reduced.

[0023] In the positioning on the right side of the split planetary carrier 7, positioning is achieved through the sleeve structure of the bearing positioning component. The sleeve structure of the bearing test positioning component 4 extends inward with an inner edge 14 corresponding to the end away from the internal thread, and the bearing test positioning component 4 covers the split planetary carrier 7. The left side of the sleeve structure is threaded to engage with the bearing test fixing plate 1, and the right inner edge 14 abuts against the right end face of the stepped structure of the sleeve split planetary carrier 7. Through the frictional engagement between the inner edge 14 and the split planetary carrier 7, the split planetary carrier 7 and the bearing test fixing plate 1 are axially positioned.

[0024] The positioning and load input of the intermediate gear shaft 8 are achieved through the cooperation of the gear shaft positioning mechanism and the torque wrench. For example... Figure 1 As shown, the gear shaft positioning mechanism includes an internal gear ring sleeve 12. The internal gear ring sleeve 12 has an opening at its left end and an end face at its right end. The inner circumferential surface of the opening on the left side of the internal gear ring sleeve 12 has teeth that mate with the tooth profile of the intermediate gear shaft 8. A wrench interface 13 is provided on the end face at the right end. The wrench interface 13 is coaxially arranged with the intermediate gear shaft 8. During testing, the torque wrench is connected to the internal gear ring sleeve 12 via the wrench interface 13. The coaxially arranged wrench interface 13 facilitates the load input of the torque wrench from the axial position, ensuring stable and uniform load input.

[0025] In this embodiment, to avoid interference with the connection of the intermediate gear shaft 8 and the load input, the left end opening of the internal gear ring sleeve 12 and the inner wall of the sleeve mating with the right end face form a chamber for the intermediate gear shaft 8 to mate with. This chamber includes a mating section 9 and an empty section 11 from left to right. The inner wall of the sleeve corresponding to the mating section 9 has teeth that mate with the tooth profile of the intermediate gear shaft 8, and the diameter of the inner wall of the sleeve corresponding to the empty section 11 is larger than the tip circle diameter of the tooth profile of the intermediate gear shaft 8. The inner circumferential surfaces of the mating section 9 and the empty section 11 are connected by a bevel 10. The design of the empty section 11 provides a certain accommodating space on the right side of the chamber for the mating of the internal gear ring sleeve 12 and the intermediate gear shaft 8. The right end face of the intermediate gear shaft 8 will not contact or interfere with the right end face of the internal gear ring sleeve 12. When the torque wrench is connected through the wrench interface 13, it also avoids contact between the torque wrench and the right end face of the intermediate gear shaft 8, thus preventing unnecessary interference.

[0026] During assembly, firstly, the split planetary carrier 7 and the intermediate gear shaft 8 are assembled and fixed. After fixing, the left end of the split planetary carrier 7 is fitted onto the second boss 6. Then, the load-bearing test positioning piece 4 is inserted from right to left onto the right end of the intermediate gear shaft 8. The load-bearing test positioning piece 4 is then threaded onto the first boss 3 until the inner edge 14 of the load-bearing test positioning piece 4 and the split planetary carrier 7 are in good frictional fit, thus positioning the split planetary carrier 7 and the load-bearing test fixing plate 1. Then, the internal gear ring sleeve 12 is inserted from the right side of the intermediate gear shaft 8. The inner wall of the internal gear ring sleeve 12 is in tooth-shaped fit with the intermediate gear shaft 8. After it is in place, the test load is provided through the torque wrench connected to the wrench interface 13.

[0027] The test fixture designed in this way for the split planetary carrier shaft-tooth connection part has a reasonable structural design. It can position the split planetary carrier 7 and the intermediate gear shaft 8 separately, and use a torque wrench to provide a stable load, so that the test data is effective and reliable, and it is convenient to optimize the design of the split planetary carrier shaft-tooth connection part based on the test data.

[0028] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A test fixture for bearing the load of a split planetary carrier shaft-tooth connection part, used to test the assembled split planetary carrier (7) and intermediate gear shaft (8), wherein the intermediate gear shaft (8) is fixed to the right end of the split planetary carrier (7), and the outer circumferential surface of the intermediate gear shaft (8) is provided with teeth, characterized in that: This includes a planetary carrier positioning mechanism, a gear shaft positioning mechanism, and a torque wrench; The planetary carrier positioning mechanism includes a load test fixing plate (1) and a load test positioning component (4). The load test fixing plate (1) has a first boss (3) protruding from it. The outer circumferential surface of the first boss (3) has an external thread. The load test positioning component (4) is a sleeve structure. The inner wall of one side of the sleeve structure has an internal thread that matches the external thread. The first boss (3) has a second boss (6) protruding from it. The left end of the split planetary carrier (7) is radially positioned and engaged with the second boss (6). The sleeve structure of the bearing test positioning component (4) extends inward to the end away from the internal thread and has an inner edge (14). The bearing test positioning component (4) is covered outside the split planetary carrier (7) and the split planetary carrier (7) and the first boss (3) are axially limited by the inner edge (14). The gear shaft positioning mechanism includes an internal gear ring sleeve (12), which has an opening at the left end and an end face at the right end. The inner circumferential surface of the opening on the left side of the internal gear ring sleeve (12) has teeth that mesh with the tooth profile of the intermediate gear shaft (8), and a wrench interface (13) is provided on the end face at the right end. The torque wrench is connected to the internal gear sleeve (12) via the wrench interface (13) during testing.

2. The load-bearing test fixture for the split planetary carrier shaft gear connection as described in claim 1, characterized in that: The end of the first boss (3) connected to the bearing test fixing plate (1) is circumferentially recessed and has a first journal (2). The external thread is provided in the circumferential section of the first boss (3) located on the right side of the first journal (2).

3. The load-bearing test fixture for the split-type planetary carrier shaft gear connection as described in claim 1, characterized in that: The end of the second boss (6) that connects to the first boss (3) is circumferentially recessed to have a second journal (5). The inner wall of the left end of the split planetary carrier (7) is sleeved on the section of the second boss (6), which is located on the right side of the second journal (5).

4. The load-bearing test fixture for the split-type planetary carrier shaft gear connection as described in claim 1, characterized in that: The wrench interface (13) is coaxially arranged with the intermediate gear shaft (8).

5. The load-bearing test fixture for the split-type planetary carrier shaft gear connection as described in claim 1, characterized in that: The left end opening of the internal gear sleeve (12) and the right end face of the sleeve form a cavity for the intermediate gear shaft (8) to engage. The cavity includes a engaging section (9) and an empty section (11) from left to right. The sleeve inner wall corresponding to the engaging section (9) has teeth that engage with the tooth profile of the intermediate gear shaft (8). The diameter of the sleeve inner wall corresponding to the empty section (11) is larger than the tooth tip circle diameter of the tooth profile of the intermediate gear shaft (8).

6. The load-bearing test fixture for the split-type planetary carrier shaft gear connection as described in claim 5, characterized in that: The inner circumferential surfaces of the mating section (9) and the empty section (11) are connected by a slope (10).

Images