Dynamometer connecting tool

Abstract

The utility model relates to the technical field of engine testing, and discloses a dynamometer connecting tool comprising a transmission shaft used for being in transmission connection with a dynamometer; the first connecting piece is in transmission connection with the transmission shaft, a plurality of first connecting holes are formed in the first connecting piece, and the first connecting holes are formed in the circumferential direction of the first connecting piece at intervals; the second connecting piece is in detachable transmission connection with the first connecting piece, the second connecting piece is located on the side, opposite to the transmission shaft, of the first connecting piece, the second connecting piece is provided with a plurality of second connecting holes, and the second connecting holes are formed in the circumferential direction of the second connecting piece at intervals; each second connecting hole and the corresponding first connecting piece are arranged in a staggered mode in the radial direction of the corresponding second connecting piece. The dynamometer connector provided by the embodiment of the utility model not only can be connected with flywheels of engines with different specifications, but also has the advantages of simple structure and low cost.

Description

Technical Field

[0001] The utility model relates to the technical field of engine testing, in particular to a dynamometer connecting tool. Background Art

[0002] The engine is connected to the dynamometer on the test bench through a connecting device to measure the speed and torque, thereby achieving the purpose of testing power.

[0003] The connection device in the related art can only adapt to a single specification of flywheel. When the dynamometer needs to test flywheels of various specifications, it is necessary to manufacture multiple connection devices, resulting in repeated structure, waste of materials and high cost. Utility Model Content

[0004] In view of this, the utility model provides a dynamometer connection tooling to solve the problems of structure duplication, material waste and high cost.

[0005] The utility model provides a dynamometer connection tooling, comprising: a transmission shaft, which is used for transmission connection with the dynamometer; a first connecting plate, which is transmission connected with the transmission shaft, and the first connecting plate is provided with a plurality of first connecting holes, and the plurality of first connecting holes are arranged at intervals along the circumference of the first connecting plate; a second connecting plate, which is detachably transmission connected with the first connecting plate, the second connecting plate is located on the side of the first connecting plate facing away from the transmission shaft, the second connecting plate is provided with a plurality of second connecting holes, and the plurality of second connecting holes are arranged at intervals along the circumference of the second connecting plate, and each of the second connecting holes and the first connecting plate are staggered in the radial direction of the second connecting plate.

[0006] Beneficial effects: By providing a first connecting piece and a second connecting piece, and the first connecting piece and the second connecting piece are detachably connected, it is possible to connect with flywheels of different specifications to test engines of different specifications, and the first connecting piece and the second connecting piece share a common transmission shaft, so there is no need to set a separate transmission shaft for each connecting piece, thus avoiding structural duplication and material waste, and reducing costs. Moreover, when the first connecting piece and the second connecting piece are in use, the transmission shaft can always remain connected to the dynamometer, without the need to separate the dynamometer connection tooling and the dynamometer, thus reducing the steps of disassembly and assembly, and improving the convenience of use.

[0007] In an alternative embodiment, the dynamometer connection tooling further includes: a third connecting piece, which is detachably and drivably connected to the first connecting piece. The third connecting piece is located on the side of the first connecting piece facing away from the transmission shaft. The third connecting piece is provided with a plurality of third connecting holes, and the plurality of third connecting holes are arranged at intervals along the circumferential direction of the third connecting piece. Each of the third connecting holes and the first connecting piece are arranged offset in the radial direction of the third connecting piece. Among them, the second connecting piece is detachably and drivably connected to the third connecting piece. The third connecting piece is located on the side of the second connecting piece facing away from the transmission shaft. Each of the second connecting holes and the third connecting piece are arranged offset in the radial direction of the second connecting piece.

[0008] Beneficial effects: By adding the third connecting piece, on the one hand, the number of connecting pieces is increased. The structures of various connecting pieces are different, which can adapt to flywheels of more engine sizes, improving the adaptability of the dynamometer connection tooling. On the other hand, the diameter of the third connecting piece is larger than that of the first connecting piece. By connecting the third connecting piece to the first connecting piece and then connecting the second connecting piece to the third connecting piece, the diameter of the second connecting piece can also be increased accordingly to connect to a larger-sized flywheel, thereby increasing the upper limit of the diameter of the flywheel that the dynamometer connection tooling can connect.

[0009] In an alternative embodiment, the dynamometer connection tooling further includes: a first fixing member, and the second connecting piece is further provided with a first fixing hole, and the first fixing member passes through the first fixing hole and the third connecting hole; and / or a second fixing member, and the third connecting piece is further provided with a second fixing hole, and the second fixing member passes through the second fixing hole and the first connecting hole.

[0010] Beneficial effects: By using the first fixing hole, the second fixing hole, the first connecting hole and the third connecting hole, it is possible to fix the relative positions of the first connecting piece, the second connecting piece and the third connecting piece without setting additional hole-like structures on the first connecting piece, the second connecting piece and the third connecting piece. The connection of the dynamometer connection tooling is convenient, ensuring the structural strength of the first connecting piece, the second connecting piece and the third connecting piece.

[0011] In an alternative embodiment, the second connecting piece is further provided with a weight-reducing hole. The maximum distance between the first fixing hole and the center of the second connecting piece is H1, the minimum distance between the weight-reducing hole and the center of the second connecting piece is H2, the maximum distance between the weight-reducing hole and the center of the second connecting piece is H3, and the minimum distance between the second connecting hole and the center of the second connecting piece is H4, and H1 < H2 < H3 < H4.

[0012] Beneficial effects: It can reduce the weight of the second connecting piece, reduce the material used for the second connecting piece, and lower the cost.

[0013] In an alternative embodiment, a first central axis is provided on a side of the first connecting piece facing away from the transmission shaft, a first central hole is provided on a side of the third connecting piece facing the first connecting piece, and the first central axis is inserted into the first central hole; and / or a second central axis is provided on a side of the third connecting piece facing away from the first connecting piece, a second central hole is provided on a side of the second connecting piece facing the third connecting piece, and the second central axis is inserted into the second central hole; and / or a third central axis is provided on a side of the second connecting piece facing away from the third connecting piece.

[0014] Advantageous effects: It can ensure that the central axes of all components of the dynamometer connection tooling coincide, the centering effect is better, the installation accuracy is improved, and thus the test accuracy is improved.

[0015] In an alternative embodiment, the transmission shaft and the first connecting piece are of an integrally formed structure.

[0016] Advantageous effects: The transmission shaft and the first connecting piece can be processed and formed at one time, the production efficiency is improved, and the connection strength between the transmission shaft and the first connecting piece is high, which can reduce the occurrence of problems such as breakage or separation between the transmission shaft and the first connecting piece under force, and extend the service life of the dynamometer connection tooling.

[0017] In an alternative embodiment, the transmission shaft includes a guiding section located at an end of the transmission shaft away from the first connecting piece, and a cross-sectional area of the guiding section gradually decreases in a direction away from the first connecting piece.

[0018] Advantageous effects: When docking the transmission shaft with the dynamometer, the guiding section can play a guiding role, which can avoid jamming during the docking of the transmission shaft and the dynamometer, and the operation is more convenient.

[0019] In an alternative embodiment, a surface of the guiding section is configured as a spherical surface.

[0020] Advantageous effects: It can avoid jamming during the docking of the transmission shaft and the dynamometer, the operation is more convenient, and the guiding section is uniformly stressed as a whole, so it is not easy to have stress concentration, reducing the damage probability of the guiding section.

[0021] In an alternative embodiment, the transmission shaft further includes a transmission section connected between the guiding section and the first connecting piece; a plurality of ribs, each rib is provided on an outer peripheral surface of the transmission section, each rib extends along an axial direction of the transmission section, and the plurality of ribs are spaced apart along a circumferential direction of the transmission section.

[0022] Beneficial effects: By providing the convex ribs, the transmission shaft can be meshed and connected with the dynamometer, and the dynamometer can drive the transmission shaft to rotate. The transmission connection between the dynamometer and the transmission shaft can further transmit the power to the flywheel through at least one of the first connecting piece, the second connecting piece, and the third connecting piece, realizing the test of the engine.

[0023] In an alternative embodiment, a guiding portion is provided at one end of the convex rib facing the guiding section, and the height of the guiding portion gradually decreases in the direction approaching the guiding section; and / or a guiding portion is provided at one end of the convex rib facing the guiding section, and the width of the guiding portion gradually decreases in the direction approaching the guiding section; and / or the width of the convex rib gradually decreases from low to high; and / or the outer surface of the transmission section and the outer surface of the guiding section are smoothly transitioned.

[0024] Beneficial effects: It can avoid jamming during the docking of the transmission shaft and the dynamometer, and the operation is more convenient. Description of the Drawings

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 An exploded view of the dynamometer connection tooling according to an embodiment of the present invention;

[0027] Figure 2 A connection schematic diagram of the transmission shaft and the first connecting piece according to an embodiment of the present invention;

[0028] Figure 3 is Figure 2 A partial enlarged schematic diagram of area A in

[0029] Figure 4 A structural schematic diagram of the first connecting piece according to an embodiment of the present invention;

[0030] Figure 5 A first structural schematic diagram of the second connecting piece according to an embodiment of the present invention;

[0031] Figure 6 A second structural schematic diagram of the second connecting piece according to an embodiment of the present invention;

[0032] Figure 7 A cross-sectional view of the second connecting piece according to an embodiment of the present invention;

[0033] Figure 8One of the schematic structural diagrams of the third connecting piece according to an embodiment of the present utility model;

[0034] Figure 9 Another schematic structural diagram of the third connecting piece according to an embodiment of the present utility model;

[0035] Figure 10 A sectional view of the third connecting piece according to an embodiment of the present utility model.

[0036] Explanation of reference numerals:

[0037] 1. Dynamometer connection tooling;

[0038] 100. Transmission shaft; 110. Guide section; 120. Transmission section; 130. Rib; 131. Guide portion;

[0039] 200. First connecting piece; 210. First connecting hole; 220. First central axis;

[0040] 300. Second connecting piece; 310. Second connecting hole; 320. Third central axis; 330. Second central hole; 340. First fixing hole; 350. Weight reduction hole;

[0041] 400. Third connecting piece; 410. Third connecting hole; 420. Second central axis; 430. First central hole; 440. Second fixing hole. Detailed implementation manners

[0042] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0043] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0044] In the description of the present utility model, "a plurality of" means two or more. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0045] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0046] In the related art, in order to solve the problem that the connecting device can only adapt to flywheels of a single specification, a variety of connecting holes are integrated on the connecting piece of the connecting device. The distances between the centers of the various connecting holes and the connecting piece are different, so that flywheels of different specifications can be connected to different connecting holes. However, due to the large number of hole structures on the connecting piece, the structural strength of the connecting piece is relatively low, and the connecting piece is easily damaged after repeated use. Moreover, since the area of the connecting piece is limited, the distances between the various connecting holes can be relatively close, so that the walls of the connecting holes are relatively thin and are easily damaged by force.

[0047] The following Figures 1 to 10 , describes the embodiments of the present utility model.

[0048] According to an embodiment of the present utility model, a dynamometer connection tooling 1 is provided. The dynamometer connection tooling 1 includes a transmission shaft 100, a first connecting piece 200, and a second connecting piece 300.

[0049] The transmission shaft 100 is used for driving connection with a dynamometer. The first connecting piece 200 is in driving connection with the transmission shaft 100. The first connecting piece 200 is provided with a plurality of first connecting holes 210. The plurality of first connecting holes 210 are arranged at intervals along the circumferential direction of the first connecting piece 200. The second connecting piece 300 is detachably in driving connection with the first connecting piece 200. The second connecting piece 300 is located on the side of the first connecting piece 200 facing away from the transmission shaft 100. The second connecting piece 300 is provided with a plurality of second connecting holes 310. The plurality of second connecting holes 310 are arranged at intervals along the circumferential direction of the second connecting piece 300. Each second connecting hole 310 and the first connecting piece 200 are arranged in a dislocation manner in the radial direction of the second connecting piece 300.

[0050] By setting the transmission shaft 100, the transmission connection between the dynamometer connection tooling 1 and the dynamometer can be realized, that is, the dynamometer can drive the dynamometer connection tooling 1 to rotate. Moreover, the transmission shaft 100 is axially movable relative to the dynamometer to offset the thickness generated by the superposition of different connecting pieces, ensuring that the distance between the flywheel and the dynamometer remains unchanged, so as to adapt to the connection of different specifications of flywheels and dynamometers.

[0051] When the dynamometer needs to test a flywheel with a smaller diameter, the second connecting piece 300 is separated from the first connecting piece 200, and the first connecting piece 200 is connected to the flywheel with a smaller diameter through the first connecting hole 210 to realize the test of the flywheel with a smaller diameter; when the dynamometer needs to test a flywheel with a larger diameter, the second connecting piece 300 is connected to the first connecting piece 200, and the second connecting piece 300 is connected to the flywheel with a larger diameter through the second connecting hole 310 to realize the test of the flywheel with a larger diameter.

[0052] Since the number of the first connecting holes 210 is multiple, when the first connecting piece 200 is connected to the flywheel with a smaller diameter through the first connecting holes 210, the relative rotation between the first connecting piece 200 and the flywheel can be avoided, ensuring the stability of the relative position between the first connecting piece 200 and the flywheel; since the number of the second connecting holes 310 is multiple, when the second connecting piece 300 is connected to the flywheel with a smaller diameter through the second connecting holes 310, the relative rotation between the second connecting piece 300 and the flywheel can be avoided, ensuring the stability of the relative position between the second connecting piece 300 and the flywheel.

[0053] In addition, each second connecting hole 310 and the first connecting piece 200 are arranged in a staggered manner in the radial direction of the second connecting piece 300, which can avoid the first connecting piece 200 from blocking the second connecting hole 310 and prevent interference between the flywheel and the first connecting piece 200 when the flywheel is connected to the second connecting piece 300, ensuring the reliability and convenience of the connection.

[0054] In the dynamometer connection tooling 1 in the embodiment of the present utility model, by providing the first connecting piece 200 and the second connecting piece 300, and the first connecting piece 200 and the second connecting piece 300 are detachably connected, the connection with flywheels of different specifications is realized to test engines of different specifications. Moreover, the first connecting piece 200 and the second connecting piece 300 share the transmission shaft 100 relative to each other, eliminating the need to separately provide a transmission shaft for each connecting piece, avoiding structural duplication and material waste, and reducing costs.

[0055] Moreover, during the use of the first connecting piece 200 and the second connecting piece 300, the transmission shaft 100 can always remain connected to the dynamometer, eliminating the need to separate the dynamometer connection tooling and the dynamometer, reducing the disassembly and assembly steps, and improving the use convenience.

[0056] In addition, since the first connecting plate 200 or the second connecting plate 300 does not need to adapt to flywheels of different specifications alone, the number of connecting holes that need to be set on the first connecting plate 200 and the second connecting plate 300 is relatively small, which can ensure the structural strength of the first connecting plate 200 and the second connecting plate 300 and reduce the damage probability of the first connecting plate 200 and the second connecting plate 300. Moreover, the number of connecting holes on the first connecting plate 200 and the second connecting plate 300 is relatively small, which can reduce the damage probability of each connecting hole.

[0057] like Figure 1 , Figures 8 - 10 As shown, in the technical solution of this embodiment, the dynamometer connecting tool 1 also includes a third connecting plate 400, which is detachably connected to the first connecting plate 200 in a transmission manner, and the third connecting plate 400 is located on the side of the first connecting plate 200 that is away from the transmission shaft 100. The third connecting plate 400 is provided with a plurality of third connecting holes 410, and the plurality of third connecting holes 410 are arranged at intervals along the circumference of the third connecting plate 400, and each third connecting hole 410 and the first connecting plate 200 are staggered in the radial direction of the third connecting plate 400.

[0058] The second connecting plate 300 is detachably connected to the third connecting plate 400 , and the third connecting plate 400 is located on the side of the second connecting plate 300 facing away from the transmission shaft 100 . Each second connecting hole 310 and the third connecting plate 400 are staggered in the radial direction of the second connecting plate 300 .

[0059] By adding the third connecting plate 400, on the one hand, the number of connecting plates is increased. The structures of the various connecting plates are different, and they can adapt to flywheels of engines of more sizes, thereby improving the adaptability of the dynamometer connecting tool 1. On the other hand, the diameter of the third connecting plate 400 is larger than the diameter of the first connecting plate 200. By connecting the third connecting plate 400 with the first connecting plate 200, and then connecting the second connecting plate 300 with the third connecting plate 400, the diameter of the second connecting plate 300 can also be increased accordingly to connect with a flywheel of a larger size, thereby increasing the upper limit of the diameter of the flywheel that can be connected to the dynamometer connecting tool 1.

[0060] In addition, each third connection hole 410 and the first connection sheet 200 are arranged in a staggered manner in the radial direction of the third connection sheet 400, so that the first connection sheet 200 can avoid blocking the third connection hole 410, and avoid interference between the flywheel and the third connection sheet 400 when connected, thereby ensuring the reliability and convenience of the connection. And each second connection hole 310 and the third connection sheet 400 are arranged in a staggered manner in the radial direction of the second connection sheet 300, so that the third connection sheet 400 can avoid blocking the second connection hole 310, and avoid interference between the flywheel and the third connection sheet 400 when connected, thereby ensuring the reliability and convenience of the connection.

[0061] In an unillustrated technical solution, the dynamometer connection tooling 1 further includes a first fixing member. The second connecting piece 300 is further provided with a first fixing hole 340, and the first fixing member passes through the first fixing hole 340 and the third connecting hole 410.

[0062] For example, the first fixing member may include a bolt and a nut. The bolt of the first fixing member passes through the first fixing hole 340 and the third connecting hole 410, and then the nut of the first fixing member is threadedly connected to the bolt to fix the relative positions of the second connecting piece 300 and the third connecting piece 400.

[0063] In an unillustrated technical solution, the dynamometer connection tooling 1 further includes a second fixing member. The third connecting piece 400 is further provided with a second fixing hole 440, and the second fixing member passes through the second fixing hole 440 and the first connecting hole 210.

[0064] For example, the second fixing member may include a bolt and a nut. The bolt of the second fixing member passes through the second fixing hole 440 and the first connecting hole 210, and then the nut of the second fixing member is threadedly connected to the bolt to fix the relative positions of the first connecting piece 200 and the third connecting piece 400.

[0065] In this way, by using the first fixing hole 340, the second fixing hole 440, the first connecting hole 210 and the third connecting hole 410, it is possible to fix the relative positions of the first connecting piece 200, the second connecting piece 300 and the third connecting piece 400 without providing additional hole-like structures on the first connecting piece 200, the second connecting piece 300 and the third connecting piece 400. The connection of the dynamometer connection tooling 1 is convenient, and the structural strength of the first connecting piece 200, the second connecting piece 300 and the third connecting piece 400 is ensured.

[0066] As Figure 1 , Figures 5 - 7 shown, in the technical solution of this embodiment, the second connecting piece 300 is further provided with a weight-reducing hole 350. By providing the weight-reducing hole 350, the weight of the second connecting piece 300 can be reduced, the material used for the second connecting piece 300 can be reduced, and the cost can be lowered.

[0067] The maximum distance between the first fixing hole 340 and the center of the second connecting piece 300 is H1, the minimum distance between the weight-reducing hole 350 and the center of the second connecting piece 300 is H2, the maximum distance between the weight-reducing hole 350 and the center of the second connecting piece 300 is H3, and the minimum distance between the second connecting hole 310 and the center of the second connecting piece 300 is H4, where H1 < H2 < H3 < H4.

[0068] In this way, the weight reduction hole 350, the first fixing hole 340, and the second connecting hole 310 are arranged offset from each other on the second connecting piece 300, which can improve the area utilization rate of the second connecting piece 300. Moreover, the weight reduction hole 350, the first fixing hole 340, and the second connecting hole 310 do not interfere with each other, which can ensure a relatively large number of the first fixing holes 340 and the second connecting holes 310. The peripheral walls of the first fixing hole 340 and the second connecting hole 310 have a relatively high structure, reducing the probability of damage to the peripheral walls of the first fixing hole 340 and the second connecting hole 310.

[0069] As Figure 1 , Figure 2 , Figure 4 , Figure 8 and Figure 10 shown, in the technical solution of this embodiment, a first central axis 220 is arranged on the side of the first connecting piece 200 facing away from the transmission shaft 100, and a first central hole 430 is arranged on the side of the third connecting piece 400 facing the first connecting piece 200. The first central axis 220 is inserted into the first central hole 430.

[0070] In this way, it can ensure that the central axes of the first connecting piece 200 and the third connecting piece 400 coincide, improving the installation accuracy and thus the test accuracy.

[0071] As Figure 1 , Figures 5 - 10 shown, a second central axis 420 is arranged on the side of the third connecting piece 400 facing away from the first connecting piece 200, and a second central hole 330 is arranged on the side of the second connecting piece 300 facing the third connecting piece 400. The second central axis 420 is inserted into the second central hole 330.

[0072] In this way, it can ensure that the central axes of the second connecting piece 300 and the third connecting piece 400 coincide, improving the installation accuracy and thus the test accuracy.

[0073] As Figure 6 and Figure 7 shown, a third central axis 320 is arranged on the side of the second connecting piece 300 facing away from the third connecting piece 400. In this way, the dynamometer connection tooling 1 can also include connecting pieces of other sizes. The connecting pieces of other sizes can be installed on the side of the second connecting piece 300 facing away from the first connecting piece 200, and the third central axis 320 can be inserted into the central hole of the connecting piece of other sizes, further expanding the applicable range of the dynamometer connection tooling 1.

[0074] Among them, the first central axis 220 can also be inserted into the second central hole 330. The sizes and structures of the first central axis 220, the second central axis 420, and the third central axis 320 can be the same, ensuring the flexibility of the fit.

[0075] As Figure 2 shown, in the technical solution of this embodiment, the transmission shaft 100 and the first connecting piece 200 are integrally formed structures. In this way, the transmission shaft 100 and the first connecting piece 200 can be processed and formed at one time, improving production efficiency, and the connection strength between the transmission shaft 100 and the first connecting piece 200 is high, which can reduce the occurrence of problems such as the transmission shaft 100 and the first connecting piece 200 being broken or separated under force, and prolong the service life of the dynamometer connection tooling 1.

[0076] As Figures 1 - 2 shown, in the technical solution of this embodiment, the transmission shaft 100 includes a guiding section 110, and the guiding section 110 is located at one end of the transmission shaft 100 away from the first connecting piece 200, and the cross-sectional area of the guiding section 110 gradually decreases in the direction away from the first connecting piece 200. In this way, when the transmission shaft 100 is docked with the dynamometer, the guiding section 110 can play a guiding role, avoiding jamming during the docking of the transmission shaft 100 and the dynamometer, and the operation is more convenient.

[0077] As Figures 1 - 2 shown, in the technical solution of this embodiment, the surface of the guiding section 110 is configured as a spherical surface. In this way, the guiding section 110 as a whole has no sharp corners or edges and other structures, which can avoid jamming during the docking of the transmission shaft 100 and the dynamometer, and the operation is more convenient. Moreover, the guiding section 110 is uniformly stressed as a whole, and stress concentration is not likely to occur in the guiding section 110, reducing the damage probability of the guiding section 110.

[0078] As Figures 2 - 3 shown, in the technical solution of this embodiment, the transmission shaft 100 further includes a transmission section 120 and a plurality of ribs 130. The transmission section 120 is connected between the guiding section 110 and the first connecting piece 200, each rib 130 is provided on the outer peripheral surface of the transmission section 120, each rib 130 extends along the axial direction of the transmission section 120, and the plurality of ribs 130 are arranged at intervals along the circumferential direction of the transmission section 120.

[0079] By setting the transmission section 120 to be connected between the guiding section 110 and the first connecting piece 200, the relative position between the guiding section 110 and the first connecting piece 200 can be ensured to be stable. By setting the ribs 130, the transmission shaft 100 can be meshed and connected with the dynamometer, and the dynamometer can transmit the force to the transmission section 120 through the plurality of ribs 130 to drive the transmission shaft 100 to rotate. The transmission connection between the dynamometer and the transmission shaft 100 can further transmit the power to the flywheel through at least one of the first connecting piece 200, the second connecting piece 300, and the third connecting piece 400, realizing the test of the engine.

[0080] As Figure 2 Figure 3As shown, in the technical solution of this embodiment, a guiding portion 131 is provided at one end of the rib 130 facing the guiding section 110, and the height of the guiding portion 131 gradually decreases in the direction approaching the guiding section 110. In this way, when docking the transmission shaft 100 with the dynamometer, the guiding portion 131 can play a guiding role, avoiding jamming during the docking of the transmission shaft 100 and the dynamometer, and making the operation more convenient.

[0081] As Figures 2 - 3 shown, in the technical solution of this embodiment, the width of the rib 130 gradually decreases from bottom to top. In this way, when docking the transmission shaft 100 with the dynamometer, the top of the rib 130 mainly cooperates with the dynamometer. Since the width of the top of the rib 130 is small, it can avoid jamming during the docking of the transmission shaft 100 and the dynamometer, making the operation more convenient. And since the width of the bottom of the rib 130 is large, the contact area between the rib 130 and the transmission section 120 is large, the connection strength between the rib 130 and the transmission section 120 is high, reducing the probability of damage due to force between the rib 130 and the transmission section 120, and extending the service life of the transmission shaft 100.

[0082] As Figures 2 - 3 shown, in the technical solution of this embodiment, a guiding portion 131 is provided at one end of the rib 130 facing the guiding section 110, and the width of the guiding portion 131 gradually decreases in the direction approaching the guiding section 110. In this way, when docking the transmission shaft 100 with the dynamometer, the guiding portion 131 can play a guiding role, avoiding jamming during the docking of the transmission shaft 100 and the dynamometer, and making the operation more convenient.

[0083] As Figures 1 - 3 shown, in the technical solution of this embodiment, the outer surface of the transmission section 120 and the outer surface of the guiding section 110 are smoothly transitioned. In this way, it not only reduces the processing difficulty of the transmission shaft 100, but also can avoid forming a step between the transmission section 120 and the guiding section 110, preventing jamming during the docking of the transmission shaft 100 and the dynamometer, making the operation more convenient, and also preventing dust accumulation between the transmission section 120 and the guiding section 110, improving the cleanliness of the transmission shaft 100.

[0084] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A dynamometer connection tool, characterized in that: include: A transmission shaft (100), the transmission shaft (100) being used for transmission connection with a dynamometer; A first connecting piece (200), the first connecting piece (200) being drivingly connected to the transmission shaft (100), the first connecting piece (200) being provided with a plurality of first connecting holes (210), the plurality of first connecting holes (210) being arranged at intervals along the circumference of the first connecting piece (200); A second connecting plate (300), wherein the second connecting plate (300) is detachably connected to the first connecting plate (200) in a transmission manner, the second connecting plate (300) is located on a side of the first connecting plate (200) that is away from the transmission shaft (100), the second connecting plate (300) is provided with a plurality of second connecting holes (310), the plurality of second connecting holes (310) are arranged at intervals along the circumference of the second connecting plate (300), and each of the second connecting holes (310) and the first connecting plate (200) are staggered in the radial direction of the second connecting plate (300).

2. The dynamometer connection tooling according to claim 1, characterized in that: Also includes: a third connecting piece (400), the third connecting piece (400) being detachably connected to the first connecting piece (200) in a transmission manner, the third connecting piece (400) being located on a side of the first connecting piece (200) facing away from the transmission shaft (100), the third connecting piece (400) being provided with a plurality of third connecting holes (410), the plurality of third connecting holes (410) being arranged at intervals along the circumference of the third connecting piece (400), and each of the third connecting holes (410) and the first connecting piece (200) being staggered in a radial direction of the third connecting piece (400); The second connecting plate (300) is detachably connected to the third connecting plate (400) in a transmission manner, the third connecting plate (400) is located on a side of the second connecting plate (300) that is away from the transmission shaft (100), and each of the second connecting holes (310) and the third connecting plate (400) are staggered in a radial direction of the second connecting plate (300).

3. The dynamometer connection tooling according to claim 2, characterized in that: Also includes: a first fixing member, the second connecting piece (300) is further provided with a first fixing hole (340), the first fixing member is passed through the first fixing hole (340) and the third connecting hole (410); and / or A second fixing member, the third connecting piece (400) is further provided with a second fixing hole (440), and the second fixing member is passed through the second fixing hole (440) and the first connecting hole (210).

4. The dynamometer connection tooling according to claim 3, characterized in that: The second connecting piece (300) is further provided with a weight-reducing hole (350), the maximum distance between the first fixing hole (340) and the center of the second connecting piece (300) is H1, the minimum distance between the weight-reducing hole (350) and the center of the second connecting piece (300) is H2, the maximum distance between the weight-reducing hole (350) and the center of the second connecting piece (300) is H3, the minimum distance between the second connecting hole (310) and the center of the second connecting piece (300) is H4, and H1<H2<H3<H4.

5. The dynamometer connection tooling according to claim 2, characterized in that: A first central axis (220) is arranged on a side of the first connecting piece (200) facing away from the transmission shaft (100), a first central hole (430) is arranged on a side of the third connecting piece (400) facing the first connecting piece (200), and the first central axis (220) is inserted into the first central hole (430); and / or A second central axis (420) is arranged on a side of the third connecting sheet (400) facing away from the first connecting sheet (200), a second central hole (330) is arranged on a side of the second connecting sheet (300) facing the third connecting sheet (400), and the second central axis (420) is inserted into the second central hole (330); and / or A third central axis (320) is arranged on a side of the second connecting piece (300) facing away from the third connecting piece (400).

6. The dynamometer connection tool according to any one of claims 1 to 5, characterized in that: The transmission shaft (100) and the first connecting piece (200) are an integrally formed structure.

7. The dynamometer connection tool according to any one of claims 1 to 5, characterized in that: The transmission shaft (100) comprises: A guide section (110), the guide section (110) being located at one end of the transmission shaft (100) away from the first connecting piece (200), and a cross-sectional area of ​​the guide section (110) gradually decreasing in a direction away from the first connecting piece (200).

8. The dynamometer connection tooling according to claim 7, characterized in that: The surface of the guide section (110) is configured as a spherical surface.

9. The dynamometer connection tool according to claim 7, characterized in that: The transmission shaft (100) further comprises: a transmission section (120), the transmission section (120) being connected between the guide section (110) and the first connecting piece (200); A plurality of convex ribs (130), each of the convex ribs (130) being arranged on the outer peripheral surface of the transmission section (120), each of the convex ribs (130) extending along the axial direction of the transmission section (120), and a plurality of the convex ribs (130) being arranged at intervals along the circumference of the transmission section (120).

10. The dynamometer connection tool according to claim 9, characterized in that: A guide portion (131) is provided at one end of the convex rib (130) toward the guide section (110), and the height of the guide portion (131) gradually decreases in a direction approaching the guide section (110); and / or A guide portion (131) is provided at one end of the convex rib (130) toward the guide section (110), and a width of the guide portion (131) gradually decreases in a direction approaching the guide section (110); and / or The width of the convex rib (130) gradually decreases from low to high; and / or There is a smooth transition between the outer surface of the transmission section (120) and the outer surface of the guide section (110).

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