Gearbox angle loss measuring instrument

Abstract

The application provides a gear box angle loss measuring instrument, which comprises a supporting base, a rotation-stopping structure on the supporting base for stopping the rotation of a transmission shaft of the gear box, and an angle measuring scale installed on the supporting base, wherein the angle measuring scale has a vertical measuring surface facing the output shaft, and the vertical measuring surface is provided with angle marks; the gear box angle loss measuring instrument further comprises a measuring pointer installed on the output shaft, and the angle measuring scale cooperates with the measuring pointer to observe the rotation angle of the output shaft when a torque is applied to the input shaft of the gear box. The gear box angle loss value can be directly read by the deflection of the measuring pointer on the output shaft on the angle measuring scale, and the angle loss can be measured accurately, quickly and conveniently, and the detection efficiency is greatly improved. Moreover, the angle loss value can be directly reflected, the measurement result is accurate, the error influence caused by indirect conversion is reduced, and the adverse phenomenon of misjudgment is avoided.

Description

Technical Field

[0001] This invention relates to the field of gearbox measuring tools, specifically to a gearbox angle loss measuring instrument. Background Technology

[0002] In the field of high-voltage switchgear, gearboxes are the key link connecting the operating mechanism and the drive shaft, such as... Figure 1 and Figure 2 The diagram shows a prior art gearbox, comprising an input shaft 10, an output shaft 40, and a drive shaft 60. The input shaft 10 and output shaft 40 are a single shaft, rotatably mounted on the main housing of the gearbox. An input key and a first bevel gear 30 are mounted on the input shaft 10, and an output key 50 is mounted on the output shaft 40. The drive shaft 60 is rotatably mounted within a drive shaft housing 20 of the gearbox, with its axis perpendicular to the axes of the input shaft 10 and output shaft 40. A second bevel gear 80, meshing with the first bevel gear 30, is mounted at one end of the drive shaft 60, and a square hole 70 is provided at the other end of the drive shaft 60. Furthermore, the drive shaft housing has four mounting holes 90 for fixed installation of the gearbox. In use, when the input shaft 10 is connected to the operating mechanism, the gearbox directly outputs power; when the drive shaft 60 is connected to the operating mechanism, the gearbox changes the transmission ratio and direction.

[0003] Gearboxes generally require high manufacturing and installation precision. In actual overall component transmission, due to changes in transmission direction, component precision, and gear meshing clearance, a certain angular loss will occur. That is, when the drive shaft 60 is fixed and a certain torque is applied to the input shaft 10, theoretically the output shaft 40 should also remain stationary. However, in reality, the output shaft 40 often rotates slightly, and the angle of rotation is the angular loss. When the angular loss exceeds a certain level, defective products will be produced. If such defective products flow into the next process, it will cause quality accidents. Therefore, it is necessary to measure the actual data of the angular loss of the gearbox.

[0004] Currently, the existing measurement method involves first adjusting the output key 50 on the output shaft 40 so that it faces upwards and the top surface is horizontal to determine a highest point. Then, the transmission shaft 60 is fixed to prevent it from rotating. A certain torque is then applied to the input shaft 10. The angle through which the output shaft 40 rotates is indirectly calculated using a functional relationship based on the change in position of the highest point. This method is not only cumbersome to operate, but also has errors in function conversion, resulting in inaccurate measurement results that cannot reflect the true value. Summary of the Invention

[0005] The purpose of this invention is to provide a gearbox angle loss measuring instrument to solve the problems of cumbersome operation and inaccurate measurement results caused by the use of indirect conversion methods to measure the angle loss of gearboxes in the prior art.

[0006] To achieve the above objectives, the gearbox angle loss measuring instrument of the present invention adopts the following technical solution:

[0007] A gearbox angle loss measuring instrument includes a support base for supporting the gearbox so that the output shaft of the gearbox extends horizontally. The support base is provided with an anti-rotation structure for anti-rotation engagement with the drive shaft of the gearbox. An angle measuring ruler is also mounted on the support base. The angle measuring ruler has a vertical measuring surface facing the output shaft, and angle marks are provided on the vertical measuring surface. The gearbox angle loss measuring instrument also includes a measuring pointer for mounting on the output shaft. The angle measuring ruler is used to cooperate with the measuring pointer to observe the rotation angle of the output shaft when a torque is applied to the input shaft of the gearbox.

[0008] The advantages of the above technical solution are as follows: the support base facilitates support for the gearbox and allows the output shaft of the gearbox to extend horizontally; the anti-rotation structure on the support base can cooperate with the drive shaft of the gearbox to prevent rotation; the angle measuring ruler installed on the support base has a vertical measuring surface facing the output shaft, with angle markings on the vertical measuring surface, and the angle measuring ruler is used to cooperate with the measuring pointer installed on the output shaft. Thus, when a torque is applied to the input shaft of the gearbox, theoretically the input shaft should not rotate because the drive shaft is fixed. However, due to changes in the transmission direction, the precision of components, and the gear meshing clearance, if the input shaft rotates when torque is applied, the output shaft will rotate synchronously. At this time, the rotation angle of the output shaft can be directly observed through the measuring pointer installed on the output shaft, directly obtaining the actual value of the angle loss. The entire measurement process does not require functional conversion, is simple to operate, directly reflects the angle loss value, and the measurement results are accurate.

[0009] Furthermore, the support base includes a base body and a measuring slider. The axis of the output shaft extends in the left-right direction, and the measuring slider is guided and slidably mounted on the base body in the left-right direction. An angle measuring ruler is fixed on the measuring slider.

[0010] The beneficial effects of the above technical solution are as follows: the angle measuring ruler is fixed on the measuring slider, and the measuring slider is guided and slidably installed on the base body in the left and right direction. This facilitates the setting and disassembly of the gearbox and also facilitates the coordination between the angle measuring ruler and the measuring pointer.

[0011] Furthermore, the measuring pointer is installed at a distance from the end face of the output shaft, the angle measuring scale is provided with a through hole for the end of the output shaft to pass through, and the measuring slider is provided with an insertion hole for the end of the output shaft to be inserted, so that the measuring slider can slide until the angle measuring scale and the measuring pointer are in contact.

[0012] The beneficial effect of the above technical solution is that as the measuring slider slides, the end of the output shaft can be inserted into the socket through the through hole, so that the angle measuring ruler is in contact with the measuring pointer, making it convenient to read the angle value.

[0013] Furthermore, the measuring pointer is used to install on the output shaft at the position where the output key is located. The measuring pointer is provided with a fitting hole for fitting outside the output shaft and an anti-rotation groove that communicates with the fitting hole and is used to prevent rotation with the output key.

[0014] The advantages of the above technical solution are: it facilitates the installation of the measuring pointer, has a simple structure, and allows the measuring pointer to rotate synchronously with the output shaft.

[0015] Furthermore, an opening is provided on the side of the sleeve hole opposite to the anti-rotation groove.

[0016] The advantages of the above technical solution are: the hole is not a complete cylindrical hole, which makes the whole thing more aesthetically pleasing, and it can avoid interference between the end of the measuring pointer and other components or structures when it is set as a complete hole.

[0017] Furthermore, the measuring slider is provided with a keyway communicating with the jack, and the angle measuring ruler is provided with a communicating groove communicating with the through hole and having the same size as the keyway.

[0018] The beneficial effects of the above technical solution are: it makes it easy to align the position of the angle measuring ruler. During installation, the shaft and the key installed on the shaft can be used to align the measuring slider and the angle measuring ruler. After the angle measuring ruler is fixed on the measuring slider, the shaft can be removed to assist in positioning.

[0019] Furthermore, the base body is provided with rectangular holes extending to the left and right, and the measuring slider includes a guide part located at the bottom for embedding into the rectangular hole and cooperating with the guide of the rectangular hole. The measuring slider also includes mounting parts located on the front and rear sides for mounting on the base body.

[0020] The advantages of the above technical solution are: the guide structure is simple and easy to process and manufacture; the measuring slider structure is simple and easy to manufacture and install.

[0021] Furthermore, the measuring pointer is plate-shaped, with one end for mounting on the output shaft and the other end having a curved hook. The end face of the hook is a plane passing through the center of the angle measuring ruler.

[0022] The beneficial effects of the above technical solution are as follows: the measuring pointer is plate-shaped, one end of the measuring pointer is used to install on the output shaft, which makes it convenient to install the measuring pointer on the output shaft; the other end of the measuring pointer is provided with a curved hook, the end face of which is a plane passing through the center of the angle measuring ruler, which makes it convenient to observe the angle value.

[0023] Furthermore, the base includes an upper plate and a lower plate. The upper plate is provided with a through hole for the drive shaft housing of the gearbox to pass through. The anti-rotation structure is a square shaft fixed on the lower plate. The upper plate is provided with a support and fixing structure for supporting and fixing the gearbox.

[0024] The advantages of the above technical solution are: the base structure is simple, which facilitates the installation of the gearbox and the setting of the anti-rotation structure, thereby facilitating the cooperation between the anti-rotation structure and the drive shaft, and also enables the gearbox to be fixed, ensuring test stability.

[0025] Furthermore, the supporting and fixing structure is a fixing cylinder fixed in the perforation of the upper plate. The inner hole of the fixing cylinder is for the transmission shaft housing to pass through. The upper end of the fixing cylinder is provided with a flange, and the flange is provided with fixing holes corresponding to the mounting holes on the gearbox.

[0026] The advantages of the above technical solution are: it uses a fixed cylinder for support and fixation, which facilitates processing and installation. Attached Figure Description

[0027] Figure 1 This is a front view schematic diagram of a gear transmission in the prior art;

[0028] Figure 2 This is a top view of a gearbox in the prior art;

[0029] Figure 3 This is a diagram showing the usage status of the gearbox angle loss measuring instrument in this invention;

[0030] Figure 4 This is a front view of the base body of the gearbox angle loss measuring instrument in this invention;

[0031] Figure 5 This is a top view of the base body of the gearbox angle loss measuring instrument in this invention;

[0032] Figure 6 This is an assembly structure diagram of the measuring slider and the angle measuring ruler of the gearbox angle loss measuring instrument in this invention;

[0033] Figure 7 This is a side view of the measuring slider of the gearbox angle loss measuring instrument in this invention;

[0034] Figure 8 This is a front view of the measuring slider of the gearbox angle loss measuring instrument in this invention;

[0035] Figure 9 This is a side view of the angle measuring ruler of the gearbox angle loss measuring instrument in this invention;

[0036] Figure 10 This is a side view of the measuring pointer of the gearbox angle loss measuring instrument in this invention;

[0037] Figure 11 This is a front view of the measuring pointer of the gearbox angle loss measuring instrument in this invention.

[0038] In the diagram: 10. Input shaft; 20. Drive shaft housing; 30. First bevel gear; 40. Output shaft; 50. Output key; 60. Drive shaft; 70. Square hole; 80. Second bevel gear; 90. Mounting hole; 1. Base body; 11. Upper plate; 12. Lower plate; 13. Fixing cylinder; 14. Square shaft; 15. Rectangular hole; 16. Positioning hole; 17. Threaded hole; 2. Measuring slider; 21. Fixing part; 22. Guide part; 23. Erection part; 24. Insertion hole; 25. Keyway; 3. Angle measuring ruler; 31. Angle mark; 32. Through hole; 33. Communicating groove; 4. Measuring pointer; 41. Sleeve hole; 42. Anti-rotation groove; 43. Hook part; 44. End face of hook part. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0041] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0042] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0043] Example 1 of the gearbox angle loss measuring instrument in this invention is as follows: Figure 3 As shown, the system includes a support base for supporting the gearbox so that the output shaft 40 of the gearbox extends horizontally. The support base is provided with an anti-rotation structure for engaging with the drive shaft 60 of the gearbox to prevent rotation. An angle measuring ruler 3 is also mounted on the support base. Specifically, in this embodiment, the support base includes a base body 1 and a measuring slider 2. The axis of the output shaft 40 is defined to extend in the left-right direction. The measuring slider 2 is guided and slidably mounted on the base body 1 in the left-right direction, and the angle measuring ruler 3 is fixed on the measuring slider 2.

[0044] Combination Figure 4 and Figure 5As shown, the base body 1 includes an upper plate 11 and a lower plate 12. The upper plate 11 is U-shaped and includes two side walls, left and right. The lower plate 12 is fixed between the two side walls of the upper plate 11. The upper plate 11 has a through hole for the drive shaft housing 20 of the gearbox to pass through. The aforementioned anti-rotation structure is a square shaft 14 fixed on the lower plate 12. The upper plate 11 has a support and fixing structure for supporting and fixing the gearbox. In this embodiment, the support and fixing structure is a fixing cylinder 13 fixed in the through hole. The inner hole of the fixing cylinder 13 allows the drive shaft housing 20 to pass through. The upper end of the fixing cylinder 13 has a flange with four fixing holes corresponding to the mounting holes on the gearbox. Two of these are positioning holes 16, which are smooth holes, and the other two are threaded holes 17. When installing the gearbox, the four fixing holes correspond vertically to the mounting holes on the gearbox. Two locating pins pass through the mounting holes on the gearbox and engage with the two locating holes 16. Two screws pass through the mounting holes on the gearbox and connect with the threaded holes 17 to support and fix the gearbox. At the same time, the square hole at the end of the drive shaft 60 engages with the square shaft 14 to prevent rotation, thus fixing the drive shaft 60 and preventing it from rotating.

[0045] like Figure 5 As shown, the upper plate 11 is provided with rectangular holes 15 extending to the left and right, combined with... Figure 6 , Figure 7 and Figure 8 As shown, the measuring slider 2 includes a fixing part 21 for mounting and fixing the angle measuring ruler 3, a guide part 22 located at the bottom for embedding into and guiding the rectangular hole 15, and mounting parts 23 located on the front and rear sides for mounting on the upper plate 11. The overall structure of the measuring slider 2 is simple, convenient for processing, manufacturing, installation, and sliding. Figure 3 and Figure 9 As shown, the angle measuring ruler 3 has a vertical measuring surface for facing the output shaft 40. Angle marks 31 are provided on the vertical measuring surface. The angle measuring ruler 3 is preferably modified from a protractor. The angle marks 31 range from 0° to 180°, and each degree corresponds to a scale line. The entire angle measuring ruler 3 is larger than a semicircle.

[0046] like Figure 3 As shown, the gearbox angle loss measuring instrument also includes a measuring pointer 4 for mounting on the output shaft 40. The measuring pointer 4 is mounted on the output shaft 40 at a position where the output key 50 is located, meaning that the measuring pointer 4 is spaced apart from the end face of the output shaft 40. To allow the measuring slider 2 to slide until the angle measuring ruler 3 is in contact with the measuring pointer 4, thus facilitating the observation of the angle value, as shown... Figure 9 As shown, a through hole 32 is provided on the angle measuring ruler 3 for the end of the output shaft 40 to pass through. The through hole 32 is concentric with the center of the angle measuring ruler. Figure 7As shown, the measuring slider 2 is provided with a socket 24 for inserting the end of the output shaft 40. In this way, the end of the output shaft 40 can be inserted into the socket 24 through the through hole 32 without affecting the rotation of the output shaft 40.

[0047] In addition, such as Figure 7 As shown, the measuring slider 2 is also provided with a keyway 25 that communicates with the socket, such as... Figure 9 As shown, the angle measuring ruler 3 is also provided with a connecting groove 33 that communicates with the through hole 32 and is the same size as the keyway 25. The connecting groove 33 is for aligning the position of the angle measuring ruler 3. When installing the angle measuring ruler 3, the shaft and the key mounted on the shaft can be passed through the measuring slider 2 first, so that the keyway 25 on the measuring slider 2 matches the key on the shaft. Then, the angle measuring ruler 3 is placed on the shaft and the connecting groove 33 matches the key on the shaft. This positions the angle measuring ruler 3. Then, the angle measuring ruler 3 is fixed to the fixing part 21 of the measuring slider 2 using screws, pressure blocks or glue. Finally, the shaft is removed, and the through hole 32 and the insertion hole 24 are exposed to facilitate the insertion of the end of the output shaft 40.

[0048] like Figure 9 As shown, the through hole 32 is an incomplete cylindrical hole, with an opening on the side opposite to the connecting groove 33. This is determined by the overall shape and size of the angle measuring ruler 3.

[0049] like Figure 10 and Figure 11 As shown, the measuring pointer 4 is plate-shaped. One end of the measuring pointer 4 is mounted on the output shaft 40, and the other end has a curved hook portion 43. The end face 44 of the hook portion is a plane passing through the center of the angle measuring ruler 3, which facilitates the observation of the angle value. The measuring pointer 4 is provided with a fitting hole 41 for fitting onto the outside of the output shaft 40 and an anti-rotation groove 42 communicating with the fitting hole 41 and used to prevent rotation with the output key 50. This facilitates the installation of the measuring pointer 4, and the measuring pointer 4 can rotate synchronously with the output shaft 40. The fitting hole 41 has an opening on the side opposite to the anti-rotation groove 42, that is, the fitting hole 41 is also a non-complete cylindrical hole. This makes the overall appearance more aesthetically pleasing, consistent with the hole on the angle measuring ruler 3, and facilitates uniform processing. At the same time, it can avoid interference between the end of the measuring pointer 4 and other components or structures when it is set as a complete hole.

[0050] The working principle of the gearbox angle loss measuring instrument in this invention is as follows:

[0051] When using, such as Figure 3As shown, the gearbox is installed on the base body 1, with the output shaft 40 and input shaft 10 located on the left and right sides respectively. The axis of the transmission shaft 60 extends vertically and engages with the square shaft 14 to prevent rotation. Then, the measuring pointer 4 is installed on the output shaft 40. The measuring slider 2, with the angle measuring ruler 3 fixed to it, is placed on the base body 1. The measuring slider 2 is pushed to the right until the angle measuring ruler 3 is in contact with the measuring pointer 4, and the angle indicated by the measuring pointer 4 is observed. Then, a certain torque, such as 40 N·m, is applied to the input shaft 10 using a torque wrench. Since the transmission shaft 60 is fixed, theoretically the input shaft 10 should not rotate. However, due to changes in the transmission direction, component precision, and gear meshing clearance, if the input shaft 10 rotates when torque is applied, the output shaft 40 will rotate synchronously. At this time, the rotation angle of the output shaft 40 can be directly observed through the measuring pointer 4, obtaining the actual value of the angle loss.

[0052] The gearbox angle loss measuring instrument of this invention directly reads the gearbox angle loss value by measuring the deflection of the measuring pointer 4 on the output shaft 40 on the angle measuring ruler 3. The entire measurement process does not require functional conversion, is simple to operate, and can accurately, quickly, and conveniently measure angle loss without being limited by the site, greatly improving the detection efficiency. Furthermore, it can directly reflect the angle loss value, providing accurate measurement results and reducing the influence of errors caused by indirect conversions and the resulting misjudgments.

[0053] In other embodiments of the gearbox angle loss measuring instrument: instead of a fixed cylinder, a fixed hole is directly machined on the upper plate, and the top surface of the upper plate is the support surface.

[0054] In other embodiments of the gearbox angle loss measuring instrument: the upper plate may not have a supporting and fixing structure. For example, it can be supported by the lower plate and held on the base body by the weight of the gearbox itself, without the need for additional fixing.

[0055] In other embodiments of the gearbox angle loss measuring instrument: the base body is not a two-layer plate structure, but a solid seat, and the seat body is provided with countersunk holes for the drive shaft housing of the gearbox to be recessed.

[0056] In other embodiments of the gearbox angle loss measuring instrument: depending on the structure of the drive shaft, when the end of the drive shaft is not provided with a square hole but with a square shaft, the anti-rotation structure on the base is an anti-rotation hole.

[0057] In other embodiments of the gearbox angle loss measuring instrument: the measuring pointer may not have a hook portion, for example, it may have a slender pointer like the hands of a clock, and the angle value can be observed by cooperating with the angle measuring ruler through the slender pointer.

[0058] In other embodiments of the gearbox angle loss measuring instrument: a groove and a rail can be provided between the measuring slider and the base body, such as a T-shaped or dovetail-shaped one, in which case no mounting part is required on the slider.

[0059] In other embodiments of the gearbox angle loss measuring instrument: the measuring slider does not have a keyway communicating with the jack, and the angle measuring ruler does not have a communicating groove communicating with the through hole. When installing the angle measuring ruler, a line can be drawn on the side of the slider in advance, so that the angle mark on the angle measuring ruler is aligned with the drawn line, and then it is fixed.

[0060] In other embodiments of the gearbox angle loss measuring instrument: no opening is provided on one side of the sleeve hole, and the hole wall of the sleeve hole is continuous and complete.

[0061] In other embodiments of the gearbox angle loss measuring instrument: the measuring pointer may not be installed on the output shaft at the position where the output key is located, but on the cylindrical section of the output shaft, with a gap from the end face of the output shaft. The measuring pointer is provided with a mounting hole, and the mounting hole and the output shaft may be tightly fitted.

[0062] In other embodiments of the gearbox angle loss measuring instrument: the measuring pointer can also be installed at the end of the output shaft, flush with the end face of the output shaft. In this case, it is not necessary to set a through hole on the angle measuring scale or a socket on the measuring slider.

[0063] In other embodiments of the gearbox angle loss measuring instrument: the support base may include a base body and a fixing plate fixed on the base body. The position of the fixing plate is not adjustable, and the angle measuring ruler is fixed on the fixing plate.

[0064] In other embodiments of the gearbox angle loss measuring instrument: the support base includes only the base body, and the angle measuring ruler itself is provided with a mounting structure for mounting on the base body.

[0065] In other embodiments of the gearbox angle loss measuring instrument: the output shaft of the gearbox can extend to the right, while the input shaft extends to the left; or, the input and output shafts can extend forward and backward.

[0066] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A gear box angle loss measuring instrument, characterised in that: The equipment includes a support base, which includes a base body and a measuring slider. The base body is used to support the gearbox so that the output shaft (40) of the gearbox extends horizontally. The base body is provided with an anti-rotation structure for anti-rotation engagement with the drive shaft (60) of the gearbox. The axis of the output shaft is defined to extend in the left-right direction. The measuring slider is guided and slidably mounted on the base body in the left-right direction. An angle measuring ruler (3) is mounted on the measuring slider. The angle measuring ruler (3) has a vertical measuring surface for facing the output shaft (40). An angle mark (31) is provided on the vertical measuring surface. The gearbox angle loss measuring instrument also includes a measuring pointer (4) for mounting on the output shaft (40). The angle measuring ruler (3) is used to cooperate with the measuring pointer (4) to observe the rotation angle of the output shaft (40) when a torque is applied to the input shaft (10) of the gearbox.

2. A gearbox angle loss measurement apparatus according to claim 1, characterised in that: Angle measuring rulers are modified from protractors.

3. The gear box angle loss measuring instrument of claim 1, wherein: The measuring pointer (4) is installed at a distance from the end face of the output shaft (40). The angle measuring ruler (3) is provided with a through hole (32) for the end of the output shaft (40) to pass through. The measuring slider (2) is provided with an insertion hole (24) for the end of the output shaft (40) to be inserted, so that the measuring slider (2) can slide until the angle measuring ruler (3) and the measuring pointer (4) are in contact.

4. A gearbox angle loss measuring apparatus according to claim 3, characterised in that: The measuring pointer (4) is used to install on the output shaft (40) at the position where the output key (50) is located. The measuring pointer (4) is provided with a sleeve hole (41) for sleeved on the outside of the output shaft (40) and an anti-rotation groove (42) that communicates with the sleeve hole (41) and is used to anti-rotate with the output key (50).

5. The gearbox angle loss measuring instrument according to claim 4, characterized in that: An opening is provided on the side of the sleeve hole (41) opposite to the anti-rotation groove (42).

6. The gearbox angle loss measuring instrument according to any one of claims 3 to 5, characterized in that: The measuring slider (2) is provided with a keyway (25) that communicates with the insertion hole (24), and the angle measuring ruler (3) is provided with a connecting groove (33) that communicates with the through hole (32) and has the same size as the keyway (25).

7. The gearbox angle loss measuring instrument according to any one of claims 1 to 5, characterized in that: The base body (1) is provided with a rectangular hole (15) extending to the left and right. The measuring slider (2) includes a guide part (22) located at the bottom for embedding into the rectangular hole (15) and cooperating with the rectangular hole (15). The measuring slider (2) also includes a mounting part (23) located on the front and rear sides for mounting on the base body (1).

8. The gearbox angle loss measuring instrument according to any one of claims 1 to 5, characterized in that: The measuring pointer (4) is plate-shaped. One end of the measuring pointer (4) is used to be mounted on the output shaft (40), and the other end is provided with a curved hook (43). The end face (44) of the hook is a plane passing through the center of the angle measuring ruler (3).

9. The gearbox angle loss measuring instrument according to any one of claims 1 to 5, characterized in that: The base body includes an upper plate (11) and a lower plate (12). The upper plate (11) is provided with a through hole for the transmission shaft housing (20) of the gearbox to pass through. The anti-rotation structure is a square shaft (14) fixed on the lower plate (12). The upper plate (11) is provided with a support and fixing structure for supporting and fixing the gearbox.

10. The gearbox angle loss measuring instrument according to claim 9, characterized in that: The supporting and fixing structure is a fixing cylinder (13) fixed in the perforation of the upper plate (11). The inner hole of the fixing cylinder (13) is for the transmission shaft housing (20) to pass through. The upper end of the fixing cylinder (13) is provided with a flange, and the flange is provided with fixing holes corresponding to the mounting holes (90) on the gearbox.

Images