A fixture for testing the maximum bending and torsion of a harmonic reducer

Abstract

This utility model discloses a large bending and torsion testing fixture for harmonic reducers, relating to the field of reducer testing technology. It includes an installation structure, a reducer body, and a bending and torsion transmission component. The installation structure includes a base, a bending and torsion flange, and a bending and torsion connecting flange, wherein the bending and torsion flange is mounted on the base, and the bending and torsion connecting flange is mounted on the side of the bending and torsion flange facing away from the base. This large bending and torsion testing fixture for harmonic reducers achieves stable installation of the reducer body through the cooperation of the base, the bending and torsion flange, and the bending and torsion connecting flange. After installing the bending and torsion connecting shaft onto the output shaft of the reducer body, bending moment testing can be achieved by installing a bending moment rod on the bending and torsion connecting shaft and a second load block on the bending moment rod. Alternatively, torque testing can be achieved by installing a torque arm on the bending and torsion connecting shaft and a first load block on the torque arm. The testing fixture has a simple structure and is easy to operate, greatly increasing the flexibility and applicability of the bending and torsion testing process for harmonic reducers.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer testing technology, and more specifically, to a testing fixture for ultra-large bending and torsion of harmonic speed reducers. Background Technology

[0002] Harmonic reducers are a new type of transmission structure in gear reducers. They utilize flexible gears to generate controllable elastic deformation waves, causing relative tooth misalignment between the rigid and flexible gears to transmit power and motion. Harmonic reducers are widely used in aerospace, energy, navigation, shipbuilding, bionic machinery, and transportation due to their advantages such as large transmission ratio, strong load-bearing capacity, high transmission accuracy, and high transmission efficiency. With the surge in applications of reducers, the requirements for reducer specifications are no longer limited to transmission indicators such as torque or speed ratio, but often also include requirements for bending moment and torque.

[0003] Typical harmonic reducer bending and torsion fixtures are designed differently for different harmonic reducer structures. Therefore, each fixture can only be used for bending and torsion testing of a single harmonic reducer. Consequently, typical harmonic reducer bending and torsion fixtures are not convenient to meet the needs of bending and torsion testing of multiple harmonic reducers, and have low applicability. In situations where bending and torsion testing of multiple harmonic reducers is required, multiple test fixtures need to be set up, resulting in high testing costs. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a large bending and torsion testing fixture for harmonic reducers to meet the bending and torsion testing needs of different harmonic reducers, and to improve the flexibility and efficiency of the bending and torsion testing process of harmonic reducers by simplifying the structural design.

[0005] To achieve the above objectives, this utility model provides a high-bending-torsion testing fixture for harmonic reducers, including a reducer body and further comprising:

[0006] The mounting structure includes a base, a bent-torsion flange rotatably mounted on the base, and a bent-torsion connecting flange mounted on the side of the bent-torsion flange away from the base. The reducer body is mounted on the side of the bent-torsion connecting flange away from the bent-torsion flange, and an output shaft is horizontally arranged inside the reducer body.

[0007] The bending and torsion transmission component includes a bending and torsion connecting shaft with one end coaxially mounted on the outer end of the output shaft, a bending moment rod coaxially inserted into the end of the bending and torsion connecting shaft away from the output shaft, a torque arm mounted on the bending and torsion connecting shaft, a first load block mounted on the torque arm, and a second load block mounted on the side of the bending moment rod away from the bending and torsion connecting shaft.

[0008] Installing the second load block on the bending moment bar increases the vertical force acting on the output shaft, so that the bending moment test of the reducer body can be performed by adjusting the vertical force. Adding the first load block on the torque arm increases the circumferential force acting on the output shaft, so that the torque test of the reducer body can be performed by adjusting the circumferential force.

[0009] Furthermore, the reducer body is a harmonic reducer, which includes a wave generator, a flexible wheel, a rigid gear, an internal gear ring, an input shaft, and an output shaft. The bending-torsion connecting shaft is coaxially mounted on the output shaft.

[0010] Furthermore, the ultra-large bending and torsion testing fixture for the harmonic reducer also includes:

[0011] The drive structure includes a coupling installed at the input end of the reducer body and a drive component installed on the side of the coupling away from the reducer body. The coupling is used to connect the drive shaft of the drive component and the input shaft of the reducer body.

[0012] Furthermore, a slot is provided on the side of the output shaft facing the outside of the reducer body, and a locking block adapted to the slot is provided on the side of the bent-torsion connecting shaft near the output shaft.

[0013] Furthermore, a number of second screws are horizontally inserted on the side of the bent-torsion connecting shaft away from the output shaft, and a number of second thread grooves adapted to the threads of the second screws are opened on the side of the output shaft facing the outside of the reducer body.

[0014] Furthermore, a slot is provided on the side of the bending and twisting connecting shaft away from the output shaft, and the inner wall size of the slot is adapted to the outer wall size of the bending moment rod. A plurality of first screws facing the axis of the bending and twisting connecting shaft are provided on the outer periphery of the bending and twisting connecting shaft, and a first thread groove adapted to the thread of the first screws is provided on the outer periphery of the bending moment rod.

[0015] Furthermore, the base is L-shaped, and a vertically arranged elongated hole is provided on the horizontal section of the base; several third screws are horizontally inserted on the side of the base away from the bending flange, and several third thread grooves adapted to the threads of the third screws are provided on the side of the bending flange near the base.

[0016] Furthermore, a number of fourth screws are horizontally inserted on the side of the bent-torsion flange away from the bent-torsion flange, and a number of fourth thread grooves adapted to the threads of the fourth screws are opened on the side of the bent-torsion flange near the base.

[0017] The bending and twisting connection flange is inclined with a number of fifth screws on the side away from the reducer body, and the fifth screws are inclined toward the reducer body. The reducer body is provided with a number of fifth thread grooves that are adapted to the threads of the fifth screws on the side near the bending and twisting connection flange.

[0018] Furthermore, a first positioning stop is provided on the side of the bending and twisting flange near the base, and the outer wall size of the first positioning stop is adapted to the inner wall size of the opening on the base. A second positioning stop is provided on the side of the bending and twisting flange near the bending and twisting connecting flange, and the outer wall size of the second positioning stop is adapted to the inner wall size of the bending and twisting connecting flange. The inner wall size of the second positioning stop and the first positioning stop are the same. The outer wall of the part of the reducer body located inside the second positioning stop is adapted to the inner wall size of the second positioning stop and the first positioning stop.

[0019] Furthermore, the side of the bending and twisting connecting shaft opposite to the output shaft is provided with several positioning protrusions, and positioning holes adapted to the outer wall size of the positioning protrusions are opened on both sides of the torque arm in the length direction.

[0020] The torque arm has several sixth screws horizontally inserted inside, and the sixth screws are divided into two groups. The first load block and the bending torsion connecting shaft are respectively provided with sixth thread grooves and seventh thread grooves that are adapted to the threads of the sixth screws. The torque arm is provided with several through holes that are adapted to the outer wall size of the sixth screws.

[0021] Compared with the prior art, this utility model has the following advantages and effects:

[0022] 1. The ultra-large bending and torsion testing fixture for harmonic reducers in this utility model achieves stable installation of the reducer body through the cooperation of the base, bending and torsion flange, and bending and torsion connecting flange in the installation structure. This effectively prevents the reducer body from moving during operation. When bending moment or torque testing is required, the bending and torsion connecting shaft can be installed on the output shaft of the reducer body. If a bending moment rod is installed on the bending and torsion connecting shaft and a second load block is installed on the bending moment rod, the bending moment test can be performed while the reducer body is running. If a torque arm is installed on the bending and torsion connecting shaft and a first load block is installed on the torque arm, the torque test can be performed while the reducer body is running. The testing fixture has a simple structure and is easy to operate, greatly increasing the flexibility and applicability of the bending and torsion testing process of harmonic reducers.

[0023] 2. The ultra-large bending and torsion test fixture for harmonic reducers in this utility model can meet the test requirements of different bending moments or torques by adjusting the weight of the first load block or the second load block, thus realizing the ultra-large bending and torsion test requirements and further enhancing the applicability of the test fixture. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the ultra-large bending and torsion testing fixture for the harmonic reducer in this embodiment of the present invention.

[0025] Figure 2 This is a schematic diagram of the connection structure between the bending and torsion connecting shaft, the bending moment rod, and the torque arm of the ultra-large bending and torsion testing fixture for the harmonic reducer in this embodiment of the present invention.

[0026] Figure 3 This is a schematic diagram of the main structure of the ultra-large bending and torsion testing fixture for the harmonic reducer in this embodiment of the present invention.

[0027] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure at point AA;

[0028] Figure 5 This is a schematic diagram of the bending and torsion connecting shaft of the ultra-large bending and torsion testing fixture for the harmonic reducer in this embodiment of the present invention.

[0029] Figure 6 This is a schematic diagram of the structure of the reducer body of the ultra-large bending and torsion testing fixture for the harmonic reducer in this embodiment of the present invention.

[0030] Figure 7 This is a side cross-sectional view of the connection between the moment rod and the second load block of the ultra-large bending and torsion test fixture of the harmonic reducer in this embodiment of the present invention.

[0031] Figure 8 This is a top cross-sectional view of the connection between the torque arm and the first load block of the ultra-large bending and torsion testing fixture for the harmonic reducer in this embodiment of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Moment rod; 101. First threaded groove; 102. Limiting groove; 2. Bending-torsion connecting shaft; 201. First screw; 202. Clamping block; 203. Second screw; 204. Protrusion; 205. Seventh threaded groove; 3. Base; 301. Third screw; 4. Bending-torsion flange; 401. Third threaded groove; 402. Fourth threaded groove; 5. Bending-torsion connecting flange; 501. Fourth screw; 502. Fifth screw; 6. Reducer body; 601. Output shaft; 602. Second threaded groove; 603. Fifth threaded groove; 7. Torque arm; 701. Sixth screw; 702. Through hole; 8. First load block; 801. Sixth threaded groove; 9. Drive component; 10. Coupling; 11. Second load block; 1101. Screw; 1102. Limiting block. Detailed Implementation

[0034] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] Please see Figure 1-8 As shown, this utility model embodiment provides a large bending and torsion testing fixture for a harmonic reducer, including an installation structure, a reducer body 6, and a bending and torsion transmission component.

[0037] The mounting structure includes a base 3, a torsion flange 4, and a torsion connecting flange 5. The torsion flange 4 is mounted on the base 3, the torsion connecting flange 5 is mounted on the side of the torsion flange 4 away from the base 3, and the reducer body 6 is mounted on the side of the torsion connecting flange 5 away from the torsion flange 4. The output shaft 601 is horizontally rotatably mounted inside the reducer body 6.

[0038] The bending and torsion transmission component includes a bending and torsion connecting shaft 2, a bending moment rod 1, a torque arm 7, a first load block 8, and a second load block 11. The bending and torsion connecting shaft 2 is coaxially mounted on the side of the output shaft 601 away from the reducer body 6. The bending moment rod 1 is coaxially mounted on the side of the bending and torsion connecting shaft 2 away from the output shaft 601. The torque arm 7 is horizontally mounted on the bending and torsion connecting shaft 2. The first load block 8 is mounted on the torque arm 7. The second load block 11 is mounted on the side of the bending moment rod 1 away from the bending and torsion connecting shaft 2.

[0039] By installing a second load block 11 on the bending moment bar 1, the vertical force acting on the output shaft 601 can be increased, so that the bending moment test of the reducer body 6 can be performed by adjusting the vertical force. By adding a first load block 8 on the torque arm 7, the circumferential force acting on the output shaft 601 can be increased, so that the torque test of the reducer body 6 can be performed by adjusting the circumferential force.

[0040] As a preferred embodiment of the above solution, in this application, the outer circumference of the second load block 11 is threaded with a plurality of screws 1101, and the screws 1101 are arranged toward the axis of the second load block 11. A limit block 1102 is rotatably installed at one end of the screw 1101 toward the axis of the second load block 11. A limit groove that is slidably adapted to the limit block 1102 is provided on the inner side of the second load block 11. A limit groove 102 that is adapted to the size of the limit block 1102 is provided on the outer wall of the bending moment rod 1, so as to adjust the position of the limit block 1102 in the second load block 11 by rotating the screws 1101. When the limit block 1102 extends to the limit groove 102 on the bending moment rod 1, the second load block 11 can be installed on the bending moment rod 1 by the interlocking action of the limit block 1102 and the limit groove 102, and the relative rotation and movement of the second load block 11 and the bending moment rod 1 are restricted.

[0041] As a preferred embodiment of the above scheme, the first load block 8 and the second load block 11 in this application are both set with several standard weights, such as 1kg, 2kg, 5kg, 14.25kg, 15kg, etc., and the weight of the installed load can be adjusted according to the requirements during use.

[0042] Please see Figure 1-6 As shown, the reducer body 6 is a harmonic reducer, which includes a wave generator, a flexible wheel, a rigid gear, an internal gear ring, an input shaft and an output shaft 601, and a torsion connecting shaft 2 is coaxially mounted on the output shaft 601.

[0043] As a further description of the above solution, the reducer body 6 shown in the accompanying drawings is a right-angle reducer using crossed roller bearings. The input shaft rotation drives the harmonic reducer to decelerate, and the decelerated motion is transmitted to the output flange through a flex wheel. Since the output flange is supported by crossed roller bearings, its axis of rotation is perpendicular to the input shaft. The right-angle reducer used is merely an example of the test fixture used in this application.

[0044] Please see Figure 1-3 As shown, the ultra-large bending and torsion test fixture for the harmonic reducer also includes a drive structure:

[0045] The drive structure includes a coupling 10 installed at the input end of the reducer body 6 and a drive member 9 installed on the side of the coupling 10 away from the reducer body 6. The coupling 10 is used to connect the drive shaft of the drive member 9 and the input shaft of the reducer body 6, so that the drive member 9 can cooperate with the coupling 10 to drive the input shaft of the reducer body 6 to rotate, thereby driving the reducer body 6 to operate.

[0046] Please see Figure 4-6As shown, the output shaft 601 has a slot on the side facing the outside of the reducer body 6, and the bent-torsion connecting shaft 2 has a locking block 202 that matches the slot on the side near the output shaft 601; this facilitates maintaining the coaxiality of the bent-torsion connecting shaft 2 and the output shaft 601 when the locking block 202 is inserted into the slot.

[0047] Please see Figure 2-6 As shown, a number of second screws 203 are horizontally inserted on the side of the bent-twist connecting shaft 2 away from the output shaft 601. A number of second threaded grooves 602 adapted to the threads of the second screws 203 are opened on the side of the output shaft 601 facing the outside of the reducer body 6. This allows the second screws 203 to pass through the bent-twist connecting shaft 2 and extend into the second threaded grooves 602, thereby maintaining the connection stability between the bent-twist connecting shaft 2 and the output shaft 601 by utilizing the threaded connection effect of the second screws 203 and the second threaded grooves 602.

[0048] Please see Figure 2-5 As shown, a slot is provided on the side of the bending-torsion connecting shaft 2 away from the output shaft 601, and the inner wall size of the slot is adapted to the outer wall size of the bending moment rod 1. The outer periphery of the bending moment rod 1 is provided with a first threaded groove 101 adapted to the thread of the first screw 201; this facilitates the horizontal insertion of the bending moment rod 1 into the bending-torsion connecting shaft 2 through the slot, thereby maintaining the coaxiality of the bending-torsion connecting shaft 2 and the bending moment rod 1.

[0049] The outer periphery of the bending-torsion connecting shaft 2 is provided with a number of first screws 201 facing the axis of the bending-torsion connecting shaft 2. The first screws 201 provided in the bending-torsion connecting shaft 2 can extend into the bending moment rod 1 through the provided first threaded groove 101, so as to realize the connection between the bending-torsion connecting shaft 2 and the bending moment rod 1 by means of the threaded connection of the first screws 201 and the first threaded groove 101, thereby restricting the relative movement of the bending-torsion connecting shaft 2 and the bending moment rod 1.

[0050] Please see Figure 1-4 As shown, the base 3 is L-shaped, and a vertically arranged elongated hole is provided on the horizontal section of the base 3. This facilitates the placement of screws and other connecting components in the elongated hole to fix the base 3 onto the working surface, thereby maintaining the stability of the base 3. Several third screws 301 are horizontally inserted on the side of the base 3 away from the bending flange 4. Several third threaded grooves 401 that are adapted to the threads of the third screws 301 are provided on the side of the bending flange 4 near the base 3. This facilitates the third screws 301 to pass through the base 3 and extend into the third threaded grooves 401 of the bending flange 4, thereby maintaining the connection stability between the base 3 and the bending flange 4 through the threaded connection between the third screws 301 and the third threaded grooves 401.

[0051] Please see Figure 1-6As shown, a number of fourth screws 501 are horizontally inserted on the side of the bent-torsion flange 5 away from the bent-torsion flange 4. A number of fourth thread grooves 402 adapted to the threads of the fourth screws 501 are opened on the side of the bent-torsion flange 4 near the base 3. This allows the fourth screws 501 to pass through the bent-torsion flange 5 and extend into the fourth thread grooves 402 in the bent-torsion flange 4, thereby maintaining the stable connection between the bent-torsion flange 4 and the bent-torsion flange 5 by utilizing the cooperation between the fourth screws 501 and the fourth thread grooves 402.

[0052] Several fifth screws 502 are inclinedly arranged on the side of the bending and twisting flange 5 away from the reducer body 6, and the fifth screws 502 are inclined toward the reducer body 6. Several fifth thread grooves 603 adapted to the threads of the fifth screws 502 are opened on the side of the reducer body 6 near the bending and twisting flange 5. This allows the fifth screws 502 to pass through the bending and twisting flange 5 and extend to the fifth thread grooves 603 in the reducer body 6, thereby maintaining the connection stability between the reducer body 6 and the bending and twisting flange 5 by utilizing the threaded connection between the fifth screws 502 and the fifth thread grooves 603.

[0053] As a further description of the above scheme, the reducer body 6 has two vertically symmetrical inclined surfaces on the side near the torsion connection flange 5. The torsion connection flange 5 has a vertically opened positioning groove on the side near the reducer body 6 that matches the open end face of the reducer body 6. This facilitates the effective installation stability of the reducer body 6 by fitting the open end face of the reducer body 6 with the positioning groove. The fifth screw 502 is arranged perpendicularly to the inclined surface on the torsion connection flange 5 so that the reducer body 6 can be tightly fitted to the torsion connection flange 5 while maintaining a stable connection between the reducer body 6 and the torsion connection flange 5. This prevents the reducer body 6 from moving relative to the torsion connection flange 5 when the reducer body 6 is working.

[0054] Please see Figure 4 As shown, a first positioning stop is provided on the side of the bending and twisting flange 4 near the base 3. The outer wall size of the first positioning stop is adapted to the inner wall size of the opening on the base 3. A second positioning stop is provided on the side of the bending and twisting flange 4 near the bending and twisting connecting flange 5. The outer wall size of the second positioning stop is adapted to the inner wall size of the bending and twisting connecting flange 5. The inner wall size of the second positioning stop and the first positioning stop are the same. The outer wall of the part of the reducer body 6 located inside the second positioning stop is adapted to the inner wall size of the second positioning stop and the first positioning stop.

[0055] As a further description of the above scheme, by setting the first positioning stop and the second positioning stop on the bending and twisting flange 4, the coaxiality of the base 3, bending and twisting flange 4, bending and twisting connecting flange 5 and reducer body 6 can be maintained during installation, so as to further reduce possible axial movement and improve the stability of the bending and twisting test fixture.

[0056] Please see Figure 1-4 As shown, a number of positioning protrusions 204 are provided on the side of the bending and twisting connecting shaft 2 away from the output shaft 601. Positioning holes that are adapted to the outer wall size of the positioning protrusions 204 are provided on both sides of the length direction of the torque arm 7. This allows the torque arm 7 to be sleeved and installed on the positioning protrusions 204 of the bending and twisting connecting shaft 2 using the positioning holes, thereby realizing the positioning of the torque arm 7 on the bending and twisting connecting shaft 2.

[0057] Please see Figure 1 , Figure 2 , Figure 4 and Figure 8 As shown, several sixth screws 701 are horizontally inserted inside the torque arm 7. The sixth screws 701 are divided into two groups. The first load block 8 and the bending-torsion connecting shaft 2 are respectively provided with sixth thread grooves 801 and seventh thread grooves 205 that are adapted to the threads of the sixth screws 701. Several through holes 702 that are adapted to the outer wall size of the sixth screws 701 are provided on the torque arm 7. This facilitates the fixing of the torque arm 7 to the bending-torsion connecting shaft 2 when the sixth screws 701 pass through the torque arm 7 and engage with the seventh thread grooves 205 on the bending-torsion connecting shaft 2, thereby maintaining the stability of the torque arm 7 on the bending-torsion connecting shaft 2. When the sixth screws 701 pass through the torque arm 7 and engage with the sixth thread grooves 801 on the first load block 8, they can fix the first load block 8 to the torque arm 7, thereby realizing the load-bearing installation.

[0058] The working process of the above-mentioned ultra-large bending and torsion test fixture for harmonic reducer is as follows:

[0059] When using this harmonic reducer ultra-large bending and torsion test fixture, the base 3 must first be installed on the test workbench, and the bending and torsion connecting flange 5 and the reducer body 6 are connected using the fifth screw 502. Then, the bending and torsion flange 4 is installed on the base 3 using the third screw 301, and the bending and torsion connecting flange 5 is installed on the bending and torsion flange 4 using the fourth screw 501, thereby realizing the installation and fixation of the reducer body 6. During this process, the first and second positioning stops set on the bending and torsion flange 4 can maintain the coaxiality of the base 3, bending and torsion flange 4, bending and torsion connecting flange 5 and reducer body 6 during installation, so as to further reduce possible axial movement and improve the stability of the bending and torsion test fixture. After that, the bending and torsion connecting shaft 2 needs to be installed on the output shaft 601 of the reducer body 6 using the second screw 203.

[0060] When conducting a bending moment test, the bending moment rod 1 needs to be inserted into the slot provided on the bending-torsion connecting shaft 2, and the axial movement of the bending moment rod 1 within the bending-torsion connecting shaft 2 is restricted by the setting of the first screw 201, thereby fixing the bending moment rod 1 on the bending-torsion connecting shaft 2. At this time, a second load block 11 can be installed on the bending moment rod 1 as needed, so as to enhance the vertical force acting on the output shaft 601 of the reducer body 6 when the reducer body 6 is running, thereby achieving the effect of conducting a bending resistance test.

[0061] When conducting torque testing, the torque arm 7 needs to be placed on the bending-torsion connecting shaft 2 and fixed to the bending-torsion connecting shaft 2 using the sixth screw 701. At the same time, the first load block 8 is installed on the torque arm 7 by arranging another set of sixth screws 701 on the torque arm 7. This enhances the circumferential force acting on the output shaft 601 of the reducer body 6 when the reducer body 6 is running, thereby achieving the function of conducting torsion testing. The weight of the first load block 8 can be selected according to the usage requirements.

[0062] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. A harmonic reducer super bending and torsion test tooling comprising a reducer body (6) characterized in that It also includes: The mounting structure includes a base (3), a torsion flange (4) rotatably mounted on the base (3), and a torsion connecting flange (5) mounted on the side of the torsion flange (4) away from the base (3). The reducer body (6) is mounted on the side of the torsion connecting flange (5) away from the torsion flange (4). An output shaft (601) is horizontally arranged inside the reducer body (6). The bending and torsion transmission component includes a bending and torsion connecting shaft (2) coaxially mounted at one end on the outer end of the output shaft (601), a bending moment rod (1) coaxially inserted into the end of the bending and torsion connecting shaft (2) away from the output shaft (601), a torque arm (7) mounted on the bending and torsion connecting shaft (2), a first load block (8) mounted on the torque arm (7), and a second load block (11) mounted on the side of the bending moment rod (1) away from the bending and torsion connecting shaft (2). By installing the second load block (11) on the bending moment bar (1), the vertical force acting on the output shaft (601) can be increased, so that the bending moment test of the reducer body (6) can be performed by adjusting the vertical force. By adding the first load block (8) on the torque arm (7), the circumferential force acting on the output shaft (601) can be increased, so that the torque test of the reducer body (6) can be performed by adjusting the circumferential force.

2. The harmonic reducer super large bend-torsion test tooling according to claim 1, characterized in that, The reducer body (6) is a harmonic reducer, which includes a wave generator, a flexible wheel, a rigid gear, an internal gear ring, an input shaft and an output shaft (601). The bending and twisting connecting shaft (2) is coaxially mounted on the output shaft (601).

3. The ultra-large bending and torsion testing fixture for harmonic reducers according to claim 2, characterized in that, Also includes: The drive structure includes a coupling (10) installed at the input end of the reducer body (6) and a drive member (9) installed on the side of the coupling (10) away from the reducer body (6). The coupling (10) is used to connect the drive shaft of the drive member (9) and the input shaft of the reducer body (6).

4. The harmonic reducer super large bend-torsion test tooling of claim 1, wherein, The output shaft (601) has a slot on the side facing the outside of the reducer body (6), and the bent-torsion connecting shaft (2) has a locking block (202) that matches the slot on the side near the output shaft (601).

5. The harmonic reducer super large bend-torsion test tooling of claim 1, wherein, The bent-torsion connecting shaft (2) has several second screws (203) horizontally inserted on the side away from the output shaft (601), and the output shaft (601) has several second thread grooves (602) adapted to the threads of the second screws (203) on the side facing the outside of the reducer body (6).

6. The ultra-large bending and torsion testing fixture for harmonic reducers according to claim 1, characterized in that, The bending and twisting connecting shaft (2) has a slot on the side away from the output shaft (601), and the inner wall size of the slot is adapted to the outer wall size of the bending moment rod (1). The outer periphery of the bending and twisting connecting shaft (2) is provided with a plurality of first screws (201) facing the axis of the bending and twisting connecting shaft (2), and the outer periphery of the bending moment rod (1) is provided with a first thread groove (101) adapted to the thread of the first screw (201).

7. The harmonic reducer super large bend-torsion test tooling of claim 1, wherein, The base (3) is L-shaped, and a vertically arranged elongated hole is provided on the horizontal section of the base (3); a number of third screws (301) are horizontally inserted on the side of the base (3) away from the bending flange (4), and a number of third thread grooves (401) adapted to the threads of the third screws (301) are provided on the side of the bending flange (4) close to the base (3).

8. The harmonic reducer super large bend-torsion test tooling of claim 1, wherein, The bent-twist flange (5) has several fourth screws (501) horizontally inserted on the side away from the bent-twist flange (4), and the bent-twist flange (4) has several fourth thread grooves (402) adapted to the threads of the fourth screws (501) on the side close to the base (3). The bending and twisting connection flange (5) is inclined with a number of fifth screws (502) on the side away from the reducer body (6), and the fifth screws (502) are inclined toward the reducer body (6). The reducer body (6) is provided with a number of fifth thread grooves (603) that are adapted to the threads of the fifth screws (502) on the side close to the bending and twisting connection flange (5).

9. The harmonic reducer super large bend-torsion test tooling of claim 1, wherein, The bending flange (4) is provided with a first positioning stop on the side near the base (3). The outer wall size of the first positioning stop is adapted to the inner wall size of the opening on the base (3). The bending flange (4) is provided with a second positioning stop on the side near the bending connecting flange (5). The outer wall size of the second positioning stop is adapted to the inner wall size of the bending connecting flange (5). The inner wall size of the second positioning stop and the first positioning stop are the same. The outer wall of the reducer body (6) located inside the second positioning stop is adapted to the inner wall size of the second positioning stop and the first positioning stop.

10. The harmonic reducer super large bend-torsion test tooling of claim 1, wherein, The bent-torsion connecting shaft (2) is provided with a number of positioning protrusions (204) on the side away from the output shaft (601), and the torque arm (7) is provided with positioning holes on both sides of the length direction that are adapted to the outer wall size of the positioning protrusions (204). The torque arm (7) has several sixth screws (701) horizontally inserted inside, and the sixth screws (701) are divided into two groups. The first load block (8) and the bending and twisting connecting shaft (2) are respectively provided with a sixth thread groove (801) and a seventh thread groove (205) adapted to the thread of the sixth screw (701). The torque arm (7) has several through holes (702) adapted to the outer wall size of the sixth screw (701).

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