Bevel gear bending strength measuring device

Abstract

The utility model belongs to the field of gear testing, and particularly relates to a bevel gear bending strength measuring device. In order to solve the technical problems of large volume and incompact structure of the whole detection device due to the fact that a positioning frame and a fixed seat are both thicker portal frames in the existing detection device, the utility model provides a bevel gear bending strength measuring device which comprises a gear shaft and a vertical plate, the vertical plate is provided with a first mounting plate and a second mounting plate which are connected with each other; in an angular space formed by the first mounting plate and the second mounting plate, one of the first mounting plate and the second mounting plate is provided with a mounting seat which is matched with a through hole in the bevel gear to be measured to fix the bevel gear to be measured, the other one of the first mounting plate and the second mounting plate is provided with a mounting hole, and the gear shaft is rotatably assembled in the mounting hole. The mounting seat and the gear shaft are concentrated in the angular space, and a thicker portal frame is not arranged, so that the structure is more compact, and miniaturization of the bevel gear bending strength measuring device is facilitated.

Description

Technical Field

[0001] The utility model belongs to the field of gear testing, in particular to a bevel gear bending strength measuring device. Background Art

[0002] When bevel gears are used, they are usually clamped where they are needed through the through hole in the middle of the bevel gears. During the use of bevel gears, the bending stress at the tooth root is the main factor leading to the failure of bevel gears. Therefore, before the bevel gears are used, it is often necessary to test the bending strength of the bevel gears to determine whether the bending strength of the bevel gears meets the use requirements.

[0003] The Chinese utility model patent with authorization announcement number CN219777073U and authorization announcement date 2023.09.29 discloses a gear strength detection device, which includes a bottom plate (i.e., a base), a positioning seat, a positioning frame, and a fixing seat are installed on the bottom plate, and a fixing mechanism for fixing a powder gear (i.e., a bevel gear) is installed on the positioning frame. A placement hole (i.e., a mounting hole) is provided on the fixing seat, and a gear sleeve (i.e., a gear shaft) is rotatably installed in the placement hole. One end of the gear sleeve close to the fixing seat is connected to a gear for meshing with the powder gear. The all-steel gear in contact (i.e., the force-applying gear) has a joint hole (i.e., a connecting structure) at the other end for connecting to a torque meter (i.e., the force-applying device); an external support is provided at one end of the gear sleeve, and a positioning hole is provided at the other end, a positioning pin is arranged in the positioning hole, the width of the external support and the length of the positioning pin are both greater than the width of the placement hole, and the distance from the external support to the positioning pin is equal to the length of the placement hole, so that the external support and the positioning pin can respectively contact with the opposite end surfaces of the fixing seat along the axial stop of the gear sleeve, thereby avoiding loosening of the gear sleeve during detection and affecting the detection result.

[0004] In the above detection device, the positioning frame and the fixing seat are both gantry frames. In order to ensure the structural strength of the positioning frame and the fixing seat, the positioning frame and the fixing seat are relatively thick, so the volume of the entire detection device is large and the structure is not compact. Utility Model Content

[0005] The utility model aims to provide a bevel gear bending strength measuring device to solve the technical problem that the positioning frame and the fixing seat in the existing detection device are both thick gantry frames, so the volume of the whole detection device is large and the structure is not compact.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the bevel gear bending strength measuring device provided by the utility model is:

[0007] A bevel gear bending strength measuring device comprises a gear shaft, one end of the gear shaft is provided with a force-applying gear, the other end is provided with a connecting structure for connecting with a force-applying device, and also comprises a vertical plate, the vertical plate has a first mounting plate and a second mounting plate connected to each other; a base is provided below the vertical plate to prevent the vertical plate from tipping over when measuring the bending strength of the bevel gear, the first mounting plate and the second mounting plate are both placed upright on the base, and an angular space is formed between the first mounting plate, the second mounting plate and the base; in the angular space, one of the first mounting plate and the second mounting plate is provided with a mounting seat for cooperating with a through hole on the bevel gear to be measured to fix the bevel gear to be measured, and the other is provided with a mounting hole, and the gear shaft can be rotatably assembled in the mounting hole so that the force-applying gear is in meshing contact with the bevel gear to be measured, wherein the axis of the force-applying gear extends horizontally, and the axial direction of the bevel gear to be measured also extends horizontally; the two ends of the gear shaft are respectively located on both sides of the mounting plate provided with the mounting hole.

[0008] Furthermore, the vertical plate also includes a connecting plate, and the connecting plate, the first mounting plate and the second mounting plate are connected end to end to form a closed loop.

[0009] Furthermore, the mounting seat is provided with a threaded hole for cooperating with the bolt and the through hole on the bevel gear to be measured to fix the bevel gear to be measured.

[0010] Furthermore, the angular space is a right-angled space.

[0011] Furthermore, a shaft sleeve is installed at each end of the mounting hole, and the gear shaft is rotatably assembled in the shaft sleeve. The inner circumference of the shaft sleeve is provided with a receiving structure for receiving lubricating oil to reduce the friction between the shaft sleeve and the gear shaft.

[0012] Furthermore, the accommodation structure is an internal thread arranged on the inner circumferential surface of the sleeve.

[0013] Furthermore, one end of the gear shaft close to the force applying gear is provided with a protrusion for cooperating with one end of the shaft sleeve close to the force applying gear along the axial stop of the gear shaft.

[0014] Furthermore, a receiving groove for the protrusion to enter and store lubricating oil is provided at one end of the sleeve close to the force-applying gear, and the protrusion can rotate a certain angle in the receiving groove along with the gear shaft to ensure that the force-applying gear can damage the tooth surface of the bevel gear to be tested.

[0015] Furthermore, the connecting structure is a loading rod fixedly connected to the gear shaft for connecting to the actuator, and the end of the loading rod away from the gear shaft is provided with a stop groove for cooperating with the actuator stop to avoid sliding between the actuator and the loading rod during loading.

[0016] The beneficial effects of the bevel gear bending strength measuring device in the utility model are as follows: the utility model is an improved invention. The gear shaft can be connected to the force-applying device through the connecting structure; the force-applying gear can apply torque to the bevel gear to be measured to measure the bending strength of the bevel gear to be measured; an angular space can be formed by the vertical plate, and the structural strength at the corner where the vertical plate forms the angular space is higher. The part where the vertical plate forms the angular space is defined as the first mounting plate and the second mounting plate. The first mounting plate and the second mounting plate are respectively provided with a mounting seat and a mounting hole. The bevel gear to be measured is fixed on the mounting seat through the through hole on the bevel gear to be measured, and the gear shaft is rotated and assembled in the mounting hole through the mounting hole, so that the force-applying gear is in meshing contact with the bevel gear to be measured, so that there is no need to set a thicker gantry, and the mounting seat and the gear shaft are concentrated at the angular space, so that the structure is more compact, which is conducive to the miniaturization of the bevel gear bending strength measuring device. When using the bevel gear bending strength measuring device of the utility model to measure the bevel gear to be measured, first, the bevel gear to be measured is fixed on the mounting seat, and the gear shaft is connected to the force-applying device through a connecting structure; then, the force-applying device applies an input load to the gear shaft, so that the force-applying gear applies torque to the bevel gear to be measured, and the input load applied by the force-applying device is continuously increased until the tooth surface of the bevel gear to be measured is broken, and the bending strength of the bevel gear to be measured is calculated according to the size of the input load of the force-applying device when the tooth surface of the bevel gear to be measured is broken. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a top view of the bevel gear bending strength measuring device in the utility model;

[0018] Description of reference numerals:

[0019] 1. Base; 2. Vertical plate; 3. Mounting seat; 4. Bevel gear to be tested; 5. Bushing; 6. Gear shaft; 7. Force gear; 8. Loading rod. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the embodiments.

[0021] The specific embodiment of the bevel gear bending strength measuring device provided by the utility model is as follows:

[0022] The purpose of this embodiment is to provide a bevel gear bending strength measuring device, by arranging a mounting seat and a gear shaft in the angular space of the vertical plate, thereby eliminating the gantry, making the structure more compact, and facilitating the miniaturization of the bevel gear bending strength measuring device.

[0023] As a specific implementation method, Figure 1As shown, the bevel gear bending strength measuring device includes a gear shaft 6, one end of the gear shaft 6 is provided with a force-applying gear 7, and the other end is provided with a connecting structure for connecting to the force-applying device. The bevel gear bending strength measuring device also includes a vertical plate 2, and the vertical plate 2 has a first mounting plate and a second mounting plate connected to each other; at the angular space formed by the first mounting plate and the second mounting plate, one of the first mounting plate and the second mounting plate is provided with a mounting seat 3 for cooperating with a through hole on the bevel gear 4 to be measured to fix the bevel gear 4 to be measured, and the other is provided with a mounting hole, and the gear shaft 6 can be rotatably assembled in the mounting hole so that the force-applying gear 7 is in meshing contact with the bevel gear 4 to be measured.

[0024] Specifically, Figure 1 As shown, the first mounting plate and the second mounting plate are perpendicular to each other, and the angular space is a right-angle space, so as to facilitate the meshing contact between the bevel gear 4 to be tested and the force-applying gear 7. However, in other specific embodiments, the angular space can also be an acute-angle space or an obtuse-angle space, and the axis of the bevel gear 4 to be tested is adjusted by the mounting seat 3, so as to ensure the meshing contact between the bevel gear 4 to be tested and the force-applying gear 7.

[0025] The gear shaft 6 can be connected to the force-applying device through the connecting structure; the force-applying gear 7 can apply torque to the bevel gear 4 to be measured to measure the bending strength of the bevel gear 4 to be measured; an angular space can be formed through the vertical plate 2, and the structural strength at the corner where the angular space is formed by the vertical plate 2 is relatively high. The portion of the vertical plate 2 forming the angular space is defined as a first mounting plate and a second mounting plate, and a mounting seat 3 and a mounting hole are respectively provided on the first mounting plate and the second mounting plate. The bevel gear 4 to be measured is fixed on the mounting seat 3 through the through hole on the bevel gear 4 to be measured, and the gear shaft 6 is rotated and assembled in the mounting hole through the mounting hole, so that the force-applying gear 7 is in meshing contact with the bevel gear 4 to be measured, thereby eliminating the need to set up a thicker gantry, and concentrating the mounting seat 3 and the gear shaft 6 at the angular space, making the structure more compact, which is conducive to the miniaturization of the bevel gear bending strength measuring device. When using the bevel gear bending strength measuring device of the utility model to measure the bevel gear 4 to be measured, first, the bevel gear 4 to be measured is fixed on the mounting seat 3, and the gear shaft 6 is connected to the force-applying device through a connecting structure; thereafter, the force-applying device applies an input load to the gear shaft 6, so that the force-applying gear 7 applies torque to the bevel gear 4 to be measured, and the input load applied by the force-applying device is continuously increased until the tooth surface of the bevel gear 4 to be measured is broken, and the bending strength of the bevel gear 4 to be measured is calculated according to the size of the input load of the force-applying device when the tooth surface of the bevel gear 4 to be measured is broken.

[0026] Specifically, the force-applying device can be a torque meter, a torque wrench, an actuator (an output device for a dynamic test), or the like. In this embodiment, the force-applying device is not limited as long as it can apply an input load (i.e., torque) to the gear shaft 6. The torque magnitude of the force-applying device can be displayed by the force-applying device itself, or a sensor can be provided to measure the torque magnitude of the force-applying device. In this embodiment, there is no limitation.

[0027] The force-applying gear 7 is a gear with a relatively large bending strength. Specifically, the force-applying gear 7 can be made of steel or other materials. In this embodiment, the material of the force-applying gear 7 is not limited, as long as the bending strength of the force-applying gear 7 can be greater than the bending strength of the bevel gear 4 to be measured. The force-applying gear 7 can be integrally formed with the gear shaft 6, or can be a split structure. When measuring different bevel gears 4 to be measured, different force-applying gears 7 can be replaced to ensure that the bending strength of the force-applying gear 7 is greater than the bending strength of the bevel gear 4 to be measured.

[0028] In order to further enhance the structural strength of the vertical plate 2 where the gear shaft 6 and the mounting seat 3 are arranged, as a specific implementation method, Figure 1 As shown, the vertical plate 2 also includes a connecting plate, and the connecting plate, the first mounting plate and the second mounting plate are connected end to end to form a closed loop. Connecting the vertical plates 2 end to end can enhance the structural strength of the vertical plate 2, thereby enhancing the structural strength of the vertical plate 2 where the gear shaft 6 and the mounting seat 3 are set, ensuring that the vertical plate 2 does not shake or deform when measuring the bending strength of the bevel gear 4 to be measured.

[0029] Specifically, Figure 1 As shown, the vertical plate 2 is a split structure, and the vertical plate 2 is surrounded by a first mounting plate, a second mounting plate and two connecting plates to form a rectangle. However, in other specific embodiments, the vertical plate 2 can also be an integrated structure; or, the vertical plate 2 is a split structure, there is one connecting plate, and the first mounting plate, the second mounting plate and the connecting plate form a right triangle; or, the connecting plates can also be three, four or more. In this embodiment, the structure of the vertical plate 2 is not limited, as long as the vertical plate 2 has a first mounting plate and a second mounting plate for forming an angular space.

[0030] In order to conveniently fix the bevel gear 4 to be tested, as a specific implementation method, Figure 1 As shown, the mounting seat 3 is provided with a threaded hole for cooperating with a bolt and a through hole on the bevel gear 4 to fix the bevel gear 4 to be tested. The bevel gear 4 to be tested can be conveniently fixed on the mounting seat 3 by the bolt. Of course, in other specific embodiments, a pin hole can also be provided on the mounting seat 3, and the bevel gear 4 to be tested can be fixed by inserting a fixing pin into the through hole and the pin hole on the bevel gear 4 to be tested at the same time.

[0031] When measuring the bending strength of the bevel gear, the force-applying device will apply a torque to the entire bevel gear bending strength measuring device. When the tooth surface of the bevel gear 4 to be measured is not damaged, there is no relative movement inside the bevel gear bending strength measuring device, so the bevel gear bending strength measuring device can be regarded as a whole. Therefore, the torque applied by the force-applying device may cause the bevel gear bending strength measuring device to tip over.

[0032] In order to prevent the bevel gear bending strength measuring device from tipping over when measuring the bending strength of the bevel gear 4 to be measured, as a specific implementation method, Figure 1 As shown, a base 1 is also provided below the vertical plate 2 to prevent the vertical plate 2 from tipping over when measuring the bending strength of the bevel gear. The base 1 can increase the contact area between the vertical plate 2 and the desktop, and the vertical plate 2 can be conveniently prevented from tipping over by the base 1. The base 1 can be rectangular, circular or other shapes. In this embodiment, the specific structure of the base 1 is not limited, as long as the base 1 can prevent the bevel gear bending strength measuring device from tipping over.

[0033] In order to facilitate processing and reduce maintenance costs, extend the service life of the gear shaft 6 and the sleeve 5, and improve the measurement accuracy of the bevel gear bending strength measuring device, as a specific implementation method, Figure 1 As shown, a sleeve 5 is installed at each end of the mounting hole, and the gear shaft 6 is rotatably assembled in the sleeve 5. A receiving structure for receiving lubricating oil to reduce the friction between the sleeve 5 and the gear shaft 6 is provided on the inner circumferential surface of the sleeve 5. By providing the sleeve 5 and filling the receiving structure with lubricating oil, the friction between the sleeve 5 and the gear shaft 6 can be reduced, and the service life of the gear shaft 6 and the sleeve 5 can be extended; at the same time, the torque applied by the force-applying device to the gear shaft 6 is equal to the sum of the torque applied by the force-applying gear 7 to the bevel gear 4 to be measured and the friction between the gear shaft 6 and the sleeve 5. When calculating, the torque applied by the force-applying device to the gear shaft 6 is used to replace the torque applied by the force-applying gear 7 to the bevel gear 4 to be measured, which has a certain error. By reducing the friction between the gear shaft 6 and the sleeve 5, the measurement accuracy of the bevel gear bending strength measuring device can be improved. After the sleeve 5 or the gear shaft 6 is worn, the corresponding sleeve 5 or the gear shaft 6 can be directly replaced without replacing the entire vertical plate 2, thereby reducing the maintenance cost.

[0034] However, in other specific embodiments, the gear shaft 6 can be directly installed in the mounting hole as in the Chinese utility model patent with authorization announcement number CN219777073U and authorization announcement date 2023.09.29 mentioned in the background technology. In other specific embodiments, only one shaft sleeve 5 can be set in the mounting hole.

[0035] When the vertical plate 2 is an integrated structure, when the gear shaft 6 and the mounting hole are worn, the corresponding bevel gear bending strength measuring device can no longer be used and needs to be replaced with a new bevel gear bending strength measuring device; when the vertical plate 2 is a split structure, only the part of the vertical plate 2 with the mounting hole and the gear shaft 6 can be replaced, thereby reducing costs.

[0036] When the friction between the gear shaft 6 and the mounting hole is relatively large, when calculating the bending strength of the bevel gear 4 to be measured, the torque applied by the force-applying device to the gear shaft 6 can be used instead of the torque applied by the force-applying gear 7 to the bevel gear 4 to be measured; of course, the maximum static friction between the gear shaft 6 and the shaft sleeve 5 can also be measured separately first, and the torque applied by the force-applying gear 7 to the bevel gear 4 to be measured can be calculated by subtracting the maximum static friction between the gear shaft 6 and the shaft sleeve 5 from the torque applied by the force-applying device to the gear shaft 6, thereby improving the measurement accuracy of the bevel gear bending strength measuring device.

[0037] Specifically, the containing structure is an internal thread arranged on the inner circumferential surface of the sleeve. The containing structure is arranged as an internal thread on the inner circumferential surface of the sleeve, which has a simple structure and is easy to process. Moreover, the lubricating oil can be stored between two adjacent circles of threads, and move to other parts of the sleeve 5 along with the threads, so that the lubricating oil can cover the entire inner circumferential surface of the sleeve 5. At the same time, the contact area between the lubricating oil in the containing structure and the gear shaft 6 is large, which can well reduce the friction between the sleeve 5 and the gear shaft 6. However, in other specific embodiments, the containing structure can also be a plurality of annular grooves on the inner circumferential surface of the sleeve, and the adjacent annular grooves are connected by a connecting channel extending axially along the sleeve 5. In this embodiment, the specific structure of the containing structure is not limited, as long as the containing structure can contain the lubricating oil and make the lubricating oil contact with the gear shaft 6.

[0038] In order to prevent the gear shaft 6 from moving in the axial direction, as a specific implementation method, Figure 1 As shown, the end of the gear shaft 6 close to the force gear 7 is provided with a protrusion for cooperating with the end of the sleeve 5 close to the force gear 7 along the axial stop of the gear shaft 6. The structure of the protrusion can refer to the structure of the external support in the Chinese utility model patent with authorization announcement number CN219777073U and authorization announcement date 2023.09.29. Of course, in other specific embodiments, the protrusion can also be a triangular protrusion, a rectangular protrusion, etc. In this embodiment, the specific structure of the protrusion is not limited, as long as the protrusion can cooperate with the end of the sleeve 5 close to the force gear 7 along the axial stop of the gear shaft 6.

[0039] When measuring the bending strength of the bevel gear 4 to be measured, since the force-applying gear 7 is in meshing contact with the bevel gear 4 to be measured, when the force-applying device applies an input load to the force-applying gear 7, the bevel gear 4 to be measured will apply a reaction force to the force-applying gear 7, thereby preventing the gear shaft 6 from moving in a direction close to the bevel gear 4 to be measured; the protrusion cooperates with the stopper at one end of the sleeve 5 close to the force-applying gear 7, thereby preventing the gear shaft 6 from moving in a direction away from the bevel gear 4 to be measured. Finally, it can be ensured that the gear shaft 6 does not move axially when measuring the bending strength of the bevel gear 4 to be measured.

[0040] Of course, in other specific embodiments, the protrusion may not be provided, but the position of the base 1 is controlled not to change, and the position of the force-applying device is controlled not to change, thereby ensuring that there is no relative movement between the gear shaft 6 and the vertical plate 2, thereby avoiding axial movement of the gear shaft 6.

[0041] In order to reduce friction, as a specific implementation method, Figure 1 As shown, one end of the sleeve 5 close to the force gear 7 is provided with a receiving groove for the protrusion to enter and store lubricating oil, and the protrusion can rotate a certain angle with the gear shaft 6 in the receiving groove to ensure that the force gear 7 can damage the tooth surface of the bevel gear 4 to be tested. The lubricating oil is filled in the receiving groove to reduce the friction between the protrusion and the sleeve 5. In this embodiment, the protrusion only needs to be able to rotate a small angle in the receiving groove, that is, in the process of the tooth surface of the bevel gear 4 to be tested being squeezed and deformed by the force gear 7, the protrusion can rotate a certain angle with the force gear 7 to ensure that the tooth surface of the bevel gear 4 to be tested is damaged. However, in other specific embodiments, the receiving groove may not be provided, and the protrusion is directly in contact with the end face of the sleeve 5 without applying lubricating oil, and the sleeve 5 and the gear shaft 6 are replaced regularly.

[0042] Specifically, the receiving groove is an annular receiving groove, but in other specific implementations, the receiving groove can also be a triangular receiving groove, a rectangular receiving groove, etc. In this embodiment, there is no limitation on the shape of the receiving groove.

[0043] As a specific embodiment, the connection structure is a loading rod 8 fixedly connected to the gear shaft 6 for connecting with the actuator, and the end of the loading rod 8 away from the gear shaft 6 is provided with a stop groove for cooperating with the actuator stop to avoid sliding between the actuator and the loading rod 8 during loading, and the loading rod 8 is fixedly connected to the gear shaft 6 through a spline. The input load is applied to the loading rod 8 by the actuator, so that the loading rod 8 applies the input load to the gear shaft 6, and finally the force-applying gear 7 applies the input load to the bevel gear 4 to be measured.

[0044] However, in other specific embodiments, the loading rod 8 and the gear shaft 6 can also be fixedly connected by threaded connection, welding, etc. In this embodiment, there is no restriction on the fixed connection method between the loading rod 8 and the gear shaft 6, as long as the loading rod 8 can transmit the input load to the gear shaft 6.

[0045] Of course, in other specific embodiments, the connection structure may also be a joint hole on the gear shaft 6, and the joint hole is used to connect with the torque joint of the torque meter, so that the torque meter can be used to apply an input load to the gear shaft 6. Of course, the connection structure may also be a block that matches a torque wrench. In this embodiment, the specific structure of the connection structure is not limited, as long as the connection structure can be connected to the force applying device so that the force applying device applies an input load to the gear shaft 6.

[0046] As a specific implementation method, Figure 1 As shown, the shaft sleeve 5 includes a first shaft sleeve 5 and a second shaft sleeve 5 respectively mounted at two ends of the mounting hole along the axial direction. However, in other specific embodiments, only one shaft sleeve 5 may be provided.

[0047] Finally, it should be noted that the above are only preferred embodiments of the utility model and are not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A bevel gear bending strength measuring device, comprising a gear shaft, one end of which is provided with a force-applying gear, and the other end of which is provided with a connecting structure for connecting with a force-applying device, characterized in that: It also includes a vertical plate, which has a first mounting plate and a second mounting plate that are connected to each other; a base is provided below the vertical plate to prevent the vertical plate from tipping over when measuring the bending strength of the bevel gear, and the first mounting plate and the second mounting plate are both placed upright on the base, and an angular space is formed between the first mounting plate, the second mounting plate and the base; in the angular space, one of the first mounting plate and the second mounting plate is provided with a mounting seat for cooperating with a through hole on the bevel gear to be measured to fix the bevel gear to be measured, and the other is provided with a mounting hole, and the gear shaft can be rotatably assembled in the mounting hole so that the force-applying gear is in meshing contact with the bevel gear to be measured, wherein the axis of the force-applying gear extends horizontally, and the axial direction of the bevel gear to be measured also extends horizontally; the two ends of the gear shaft are respectively located on both sides of the mounting plate provided with the mounting hole.

2. The bevel gear bending strength measuring device according to claim 1, characterized in that: The vertical plate also includes a connecting plate, and the connecting plate, the first mounting plate and the second mounting plate are connected end to end to form a closed loop.

3. The bevel gear bending strength measuring device according to claim 1 or 2, characterized in that: The mounting seat is provided with a threaded hole which is used to match with the bolt and the through hole on the bevel gear to be measured so as to fix the bevel gear to be measured.

4. The bevel gear bending strength measuring device according to claim 1 or 2, characterized in that: The angular space is a right-angled space.

5. The bevel gear bending strength measuring device according to claim 1 or 2, characterized in that: A shaft sleeve is installed at each end of the mounting hole, and the gear shaft is rotatably assembled in the shaft sleeve. The inner circumference of the shaft sleeve is provided with a receiving structure for receiving lubricating oil to reduce the friction between the shaft sleeve and the gear shaft.

6. The bevel gear bending strength measuring device according to claim 5, characterized in that: The accommodating structure is an internal thread arranged on the inner circumferential surface of the sleeve.

7. The bevel gear bending strength measuring device according to claim 5, characterized in that: One end of the gear shaft close to the force-applying gear is provided with a protrusion for cooperating with one end of the shaft sleeve close to the force-applying gear along the axial stop of the gear shaft.

8. The bevel gear bending strength measuring device according to claim 7, characterized in that: One end of the sleeve close to the force-applying gear is provided with a receiving groove for the protrusion to enter and store lubricating oil. The protrusion can rotate a certain angle with the gear shaft in the receiving groove to ensure that the force-applying gear can destroy the tooth surface of the bevel gear to be tested.

9. The bevel gear bending strength measuring device according to claim 1 or 2, characterized in that: The connecting structure is a loading rod fixedly connected to the gear shaft for connecting to the actuator. The end of the loading rod away from the gear shaft is provided with a stop groove for cooperating with the actuator stop to avoid sliding between the actuator and the loading rod during loading.

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