NVH offline detection device for automobile transmission

Abstract

The invention relates to an automobile gearbox NVH offline detection device, and belongs to the technical field of gearbox detection. The automobile gearbox NVH offline detection device comprises an L-shaped detection frame, a mounting base, an NVH sensor, a pushing block, a first elastic piece and a connecting piece, the L-shaped detection frame comprises a vertical extension part and a transverse extension part which are connected, the vertical extension part is provided with a first guide structure, the first guide structure extends in the first direction, the mounting base is movably assembled on the first guide structure, and the transverse extension part is provided with a second guide structure. The NVH sensor is mounted on the mounting base, the transverse extension part is provided with a second guide structure, the second guide structure extends in the second direction, the pushing block is movably assembled on the second guide structure and is biased to be away from the vertical extension part by the first elastic piece, and at least one part of the pushing block is higher than the first upper surface of the transverse extension part; the two ends of the connecting piece are rotationally connected with the mounting base and the pushing block correspondingly. According to the invention, the NVH offline detection efficiency of the automobile gearbox can be improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of gearbox detection, and particularly to an NVH off-line detection device for an automotive gearbox. Background Art

[0002] In the production process of automotive components, through NVH (Noise, Vibration, Harshness) off-line detection, it can be ensured that the automotive gearbox meets the relevant national and industrial standards and requirements before leaving the factory, and avoid quality unqualified caused by problems such as noise and vibration.

[0003] When performing NVH off-line detection, generally, after moving the gearbox to a specified position, the position of the NVH sensor needs to be adjusted to make the NVH sensor contact and cooperate with the gearbox for detecting the gearbox. The steps are relatively cumbersome, time-consuming and laborious. Especially when detecting a large number of automotive gearboxes, the detection efficiency will be greatly affected. Summary of the Invention

[0004] In view of this, the embodiments of the present disclosure provide an NVH off-line detection device for an automotive gearbox, which can improve the efficiency of NVH off-line detection of the automotive gearbox. The technical solution is as follows:

[0005] The NVH off-line detection device for an automotive gearbox includes an L-shaped detection frame, a mounting seat, an NVH sensor, a pushing block, a first elastic member and a connecting member. The L-shaped detection frame includes a vertically extending portion and a horizontally extending portion connected to each other;

[0006] The vertically extending portion has a first guiding structure extending along a first direction. The mounting seat is movably assembled on the first guiding structure, and the NVH sensor is mounted on the mounting seat. Wherein, the first direction is the direction of approaching or departing from the horizontally extending portion;

[0007] The horizontally extending portion has a second guiding structure extending along a second direction. The pushing block is movably assembled on the second guiding structure and is biased by the first elastic member to be away from the vertically extending portion. At least a part of the pushing block is higher than the first upper surface of the horizontally extending portion located inside the L-shaped detection frame. Wherein, the second direction is the direction of approaching or departing from the vertically extending portion;

[0008] The first end and the second end of the connecting member are respectively rotatably connected to the mounting seat and the pushing block. And when the pushing block approaches the vertically extending portion, the second end of the connecting member gradually moves away from the L-shaped detection frame, so that the connecting member drives the mounting seat to approach the horizontally extending portion.

[0009] In a possible implementation, the NVH off-line detection device for the vehicle transmission further includes a limiting block and a second elastic member;

[0010] The lateral extension portion further has a receiving groove, and the receiving groove is located on a side of the first guiding structure away from the vertical extension portion;

[0011] The limiting block is movably assembled in the receiving groove and is biased by the second elastic member to protrude from the receiving groove and be located on a side of the pushing block away from the vertical extension portion along the second direction.

[0012] In a possible implementation, the lateral extension portion includes a connected support section and a loading section, and the first upper surface is the upper surface of the support section;

[0013] The support section is connected to the vertical extension portion, and the first guiding structure is located on the support section;

[0014] The loading section is located on a side of the first guiding structure away from the vertical extension portion along the second direction, and the second upper surface of the loading section extends obliquely from the first upper surface to the ground along the second direction;

[0015] The receiving groove is located on the support section or the loading section.

[0016] In a possible implementation, the side of the limiting block away from the vertical extension portion along the second direction has a guiding inclined surface;

[0017] Wherein, when the limiting block protrudes from the receiving groove, at least a part of the guiding inclined surface can be located outside the receiving groove;

[0018] When the guiding inclined surface is subjected to a force along the second direction towards the vertical extension portion, the limiting block is forced to retract into the receiving groove.

[0019] In a possible implementation, the included angle between the vertical extension portion and the lateral extension portion is less than or equal to 90°, the vertical extension portion extends along the first direction, and the lateral extension portion extends along the second direction;

[0020] The pushing block and the NVH sensor are both located on a first side of the vertical extension portion. The pushing block has a connecting portion, and the connecting portion extends to a second side of the vertical extension portion. A part of the connecting portion located on the second side of the vertical extension portion is rotatably connected to the connecting member;

[0021] Wherein, the first side and the second side of the vertical extension portion are respectively located on opposite sides of the vertical extension portion along the second direction.

[0022] In a possible implementation, the first guiding structure is a strip-shaped through hole penetrating the first side and the second side of the vertical extension portion, and the mounting seat is movably assembled in the strip-shaped through hole.

[0023] In a possible implementation, the second guiding structure is a guiding groove recessed in the first upper surface, the pushing block is movably assembled in the guiding groove, and at least a part of the pushing block protrudes from the first upper surface.

[0024] In a possible implementation, the NVH sensor is configured to be selectively movable along the first direction on the mounting seat.

[0025] In a possible implementation, the lateral extension portion is plate-shaped.

[0026] In a possible implementation, the automotive transmission NVH off-line detection device further includes at least four support pads, and the at least four support pads are respectively mounted on at least the four corners of the lower side of the lateral extension portion.

[0027] In the solution shown in the present disclosure, first, the transmission to be detected is placed on the first upper surface of the lateral extension portion on the side of the pushing block away from the vertical extension portion, and then the transmission is moved toward the vertical extension portion. Since at least a part of the pushing block is higher than the first upper surface of the lateral extension portion, the transmission can abut against the pushing block and push the pushing block closer to the vertical extension portion, and then can drive the mounting seat closer to the lateral extension portion, so that the NVH sensor on the mounting seat can approach and contact the transmission to perform NVH off-line detection on the transmission. Moreover, when the pushing block approaches the vertical extension portion, the first elastic member will deform. Therefore, after the detection is completed, by moving the transmission in a direction away from the vertical extension portion, the first elastic member can recover its deformation, and then drive the pushing block and the mounting seat to reset, and the NVH sensor disengages from the detected transmission, facilitating the detection of the next transmission. Thus, the steps of the automotive transmission NVH off-line detection device for performing NVH off-line detection on the transmission are relatively simple, and therefore the efficiency of automotive transmission NVH off-line detection can be improved. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1It is a schematic structural diagram of the first perspective of the NVH off-line detection of an automotive transmission provided by an embodiment of the present disclosure;

[0030] Figure 2 It is a schematic structural diagram of the second perspective of the NVH off-line detection of an automotive transmission provided by an embodiment of the present disclosure;

[0031] Figure 3 It is a schematic structural diagram of the disassembly of some components of the NVH off-line detection of an automotive transmission provided by an embodiment of the present disclosure;

[0032] Figure 4 It is a schematic structural diagram of the disassembly between a limiting block and a receiving groove provided by an embodiment of the present disclosure;

[0033] Figure 5 It is a schematic structural diagram of the disassembly between a mounting seat and an NVH sensor provided by an embodiment of the present disclosure.

[0034] Description of reference numerals

[0035] 1. L-shaped detection frame; 11. Vertical extension part; 111. First guiding structure; 12. Horizontal extension part; 121. Second guiding structure; 122. Receiving groove; 123. Support section; 1231. First upper surface; 124. Loading section; 1241. Second upper surface; 2. Mounting seat; 21. Mounting hole; 22. Third guiding structure; 3. NVH sensor; 31. Fixed seat; 4. Pushing block; 41. First elastic member; 42. Connecting part; 43. Fourth guiding structure; 5. Connecting member; 6. Limiting block; 61. Second elastic member; 62. Guiding inclined surface; 7. Support pad; 8. Fixing member. Detailed implementation manners

[0036] To make the objectives, technical solutions, and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in detail with reference to the accompanying drawings.

[0037] This embodiment relates to an NVH off-line detection device for an automotive transmission. Refer to Figure 1 the schematic structural diagram of the first perspective of the NVH off-line detection of an automotive transmission shown in Figure 2 and the schematic structural diagram of the second perspective of the NVH off-line detection of an automotive transmission shown in

[0038] Continue to refer to Figure 2As shown, the vertical extension portion 11 has a first guiding structure 111, and the first guiding structure 111 extends along a first direction. The mounting seat 2 is movably assembled on the first guiding structure 111, and the NVH sensor 3 is mounted on the mounting seat 2. Among them, the first direction is the direction of approaching or departing from the horizontal extension portion 12.

[0039] Continue to refer to Figure 1 As shown, the horizontal extension portion 12 has a second guiding structure 121, and the second guiding structure 121 extends along a second direction. The pushing block 4 is movably assembled on the second guiding structure 121 and is biased by a first elastic member 41 to be away from the vertical extension portion 11. At least a part of the pushing block 4 is higher than the first upper surface 1231 of the horizontal extension portion 12 located inside the L-shaped detection frame 1. Among them, the second direction is the direction of approaching or departing from the vertical extension portion 11.

[0040] Continue to refer to Figure 2 As shown, the first end and the second end of the connecting member 5 are respectively rotatably connected to the mounting seat 2 and the pushing block 4. For example, the connecting member 5 can be a straight rod, a bent rod, or other rigid structural members. In this embodiment, Figure 2 Taking the connecting portion 42 shown as an example where the connecting member 5 is a straight rod. The first end of the connecting member 5 can be rotatably connected to the mounting seat 2, and the second end of the connecting member 5 can be rotatably connected to the pushing block 4.

[0041] Among them, when the pushing block 4 approaches the vertical extension portion 11, the second end of the connecting member 5 gradually moves away from the L-shaped detection frame 1, so that the connecting member 5 drives the mounting seat 2 to approach the horizontal extension portion 12. Correspondingly, when the pushing block 4 moves away from the vertical extension portion 11, the second end of the connecting member 5 gradually approaches the L-shaped detection frame 1, so that the connecting member 5 drives the mounting seat 2 to move away from the horizontal extension portion 12.

[0042] As described above, first place the gearbox to be detected on the first upper surface 1231 of the horizontal extension portion 12 on the side of the pushing block 4 away from the vertical extension portion 11, and then move the gearbox towards the vertical extension portion 11. Since at least a part of the pushing block 4 is higher than the first upper surface 1231 of the horizontal extension portion 12, the gearbox can abut against the pushing block 4 and push the pushing block 4 to approach the vertical extension portion 11, and further drive the mounting seat 2 to approach the horizontal extension portion 12, so that the NVH sensor 3 on the mounting seat 2 can approach and contact the gearbox to perform NVH off-line detection on the gearbox.

[0043] Moreover, when the pushing block 4 approaches the vertical extension portion 11, the first elastic member 41 will deform. Therefore, after the detection is completed, by moving the gearbox in the direction away from the vertical extension portion 11, the first elastic member 41 can restore its deformation, and further drive the pushing block 4 and the mounting seat 2 to reset, and the NVH sensor 3 disengages from the detected gearbox, facilitating the detection of the next gearbox.

[0044] Thus, the steps for the automotive transmission NVH off-line detection device to perform NVH off-line detection on the transmission are relatively simple, so the efficiency of automotive transmission NVH off-line detection can be improved.

[0045] In one example, in order to achieve the rotational connection of the connecting member 5 with the mounting seat 2 and the pushing block 4 respectively. Correspondingly, the first end of the connecting member 5 may have a first rotational structure, the mounting seat 2 has a second rotational structure, and the rotational connection between the connecting member 5 and the mounting seat 2 can be achieved through the cooperation of the first rotational structure and the second rotational structure. The second end of the connecting member 5 has a third rotational structure, the pushing block 4 may have a fourth rotational structure, and the rotational connection between the connecting member 5 and the pushing block 4 can be achieved through the cooperation of the third rotational structure and the fourth rotational structure.

[0046] In one example, between the first rotational structure of the connecting member 5 and the second rotational structure of the mounting seat 2, one is a rotating shaft and the other is a rotating hole. For example, the first rotational structure is a rotating hole and the second rotational structure is a rotating shaft. Another example is that the first rotational structure is a rotating shaft and the second rotational structure is a rotating hole.

[0047] In one example, between the third rotational structure of the connecting member 5 and the fourth rotational structure of the mounting seat 2, one is a rotating shaft and the other is a rotating hole. For example, the third rotational structure is a rotating hole and the fourth rotational structure is a rotating shaft. Another example is that the third rotational structure is a rotating shaft and the fourth rotational structure is a rotating hole.

[0048] In one example, referring to Figure 2 and Figure 4 as shown, the automotive transmission NVH off-line detection device further includes a limiting block 6 and a second elastic member 61. The lateral extension portion 12 further has a receiving groove 122, and the receiving groove 122 is located on the side of the first guiding structure 111 away from the vertical extension portion 11.

[0049] Wherein, the limiting block 6 is movably assembled in the receiving groove 122 and is biased by the second elastic member 61 to protrude from the receiving groove 122 and be located on the side of the pushing block 4 away from the vertical extension portion 11 along the second direction. Thus, the first elastic member 41 can push the pushing block 4 towards the side where the limiting block 6 is located.

[0050] For example, in Figure 4 , the notch of the receiving groove 122 can face upward, the limiting block 6 is vertically movably assembled in the receiving groove 122, the second elastic member 61 can be a compression spring or an elastic cushion block, etc. The second elastic member 61 can be arranged at the bottom of the receiving groove 122, the bottom end of the second elastic member 61 can be fixedly connected to the bottom wall of the receiving groove 122, and the top end of the second elastic member 61 can be fixedly connected to the bottom of the limiting block 6.

[0051] As described above, when placing the gearbox on the first upper surface 1231, the limit block 6 can be squeezed into the receiving groove 122, so as to facilitate moving the gearbox toward the vertical extension portion 11, until the gearbox completely passes over the receiving groove 122, and the second elastic member 61 can push a part of the limit block 6 out of the receiving groove 122. And because the part of the limit block 6 extending out of the receiving groove 122 is located on the side of the push block 4 away from the vertical extension portion 11 along the second direction, and the first elastic member 41 can push the push block 4 toward the side where the limit block 6 is located, the gearbox can be limited to a certain extent by the push block 4 and the limit block 6. In this way, the stability during NVH offline detection can be improved, which is conducive to improving the accuracy of detection.

[0052] In one example, reference Figure 2 As shown, the transverse extension portion 12 includes a connected support section 123 and a feeding section 124. For example, the support section 123 and the feeding section 124 can be integrally formed, or can be two independent structural members fixedly connected together by bolts, clamping, etc. In addition, the first upper surface 1231 is the upper surface of the support section 123.

[0053] The support section 123 is connected to the vertical extension portion 11 . For example, the support section 123 and the vertical extension portion 11 may be integrally formed, or may be two independent structural members fixedly connected together by bolts, clamping, etc. The first guide structure 111 is located on the support section 123 .

[0054] refer to Figure 2 As shown, the feeding section 124 is located on the side of the first guide structure 111 away from the vertical extension portion 11 along the second direction. Figure 4 As shown, the second upper surface 1241 of the feeding section 124 extends obliquely from the first upper surface 1231 to the ground along the second direction.

[0055] Furthermore, the receiving groove 122 is located on the supporting section 123 or the feeding section 124. Figure 4 In the embodiment, the receiving groove 122 can be located on the supporting section 123 , but the receiving groove 122 is located on the feeding section 124 .

[0056] Thus, the gearbox can be directly pushed from the ground to the first upper surface 1231 via the second upper surface 1241. Accordingly, in order to avoid the limit block 6 from hindering the movement of the gearbox, the operator can first press the limit block 6 into the receiving groove 122 with hands or other tools until the gearbox can be blocked in the notch of the receiving groove 122, and then directly continue to move the gearbox. In this way, the physical strength required for placing the gearbox can be reduced, and at the same time, the efficiency of placing the gearbox can be improved, which is conducive to improving the efficiency of the gearbox NVH offline detection.

[0057] In one example, continue to refer to Figure 1 As shown, the limiting block 6 has a guiding inclined surface 62 on one side away from the vertical extending portion 11 along the second direction.

[0058] When the stopper 6 extends out of the receiving groove 122, at least a portion of the guide inclined surface 62 can be located outside the receiving groove 122. Therefore, when the gearbox moves toward the vertical extension portion 11, it can abut against the guide inclined surface 62. Moreover, when the guide inclined surface 62 is subjected to a force in the second direction toward the vertical extension portion 11, the stopper 6 is forced to retract toward the receiving groove 122. Therefore, when the gearbox moves toward the vertical extension portion 11, the stopper 6 can be squeezed toward the receiving groove 122.

[0059] For example, the guide inclined surface 62 may be facing away from the vertical extension portion 11 and inclined upward. Thus, when the gearbox is pushed from the ground to the first upper surface 1231 via the second upper surface 1241, the gearbox can retract the limit block 6 into the receiving groove 122 by squeezing the guide inclined surface 62 until the gearbox passes over the limit block 6, and then the limit block 6 can extend from the receiving groove 122 again and cooperate with the push block 4 to limit the gearbox.

[0060] In one example, reference Figure 1 and Figure 2 As shown, the included angle between the vertical extension portion 11 and the lateral extension portion 12 is less than or equal to 90°. For example, the included angle between the vertical extension portion 11 and the lateral extension portion 12 can be 90°, 85°, 80°, etc. The vertical extension portion 11 extends along the first direction, and the lateral extension portion 12 extends along the second direction.

[0061] Continue to refer Figure 1 and Figure 2 As shown, the push block 4 and the NVH sensor 3 are both located on the first side of the vertical extension portion 11. The push block 4 has a connecting portion 42, which extends to the second side of the vertical extension portion 11. The connecting portion 42 and the push block 4 can be integrally formed, or can be two independent structural parts fixedly connected together by bolts, welding, etc.

[0062] For example, in Figure 2 In the embodiment, the connecting portion 42 may be a strip-shaped plate, but the connecting portion 42 may also be a strip-shaped rod, or a curved rod, etc. In this embodiment, the connecting portion 42 may be a strip-shaped rod, or a curved rod, etc. Figure 2Taking the connecting portion 42 shown as a strip-shaped plate member as an example. The vertical extension portion 11 may have a through hole 112, and the through hole 112 may penetrate the vertical extension portion 11 along the second direction. Moreover, the first end of the connecting portion 42 may be connected to the side of the pushing block 4 facing the vertical extension portion 11, and the second end of the connecting portion 42 may pass through the through hole 112 and extend to the second side of the vertical extension portion 11. And, a part of the connecting portion 42 located on the second side of the vertical extension portion 11 is rotatably connected to the connecting member 5.

[0063] Wherein, the first side and the second side of the vertical extension portion 11 are respectively located on opposite sides of the vertical extension portion 11 along the second direction.

[0064] As described above, referring to Figure 2 shown, when the pushing block 4 moves towards the vertical extension portion 11, it can drive the connecting portion 42 to move, and make a part of the connecting portion 42 located on the second side of the vertical extension portion 11 gradually move away from the L-shaped detection frame 1, so that the mounting seat 2 can approach the lateral extension portion 12, and the NVH sensor 3 on the mounting seat 2 can approach and contact the gearbox to perform NVH off-line detection on the gearbox.

[0065] When the pushing block 4 moves towards the side away from the vertical extension portion 11, it makes a part of the connecting portion 42 located on the second side of the vertical extension portion 11 gradually approach the L-shaped detection frame 1, so that the mounting seat 2 can move away from the lateral extension portion 12, and the NVH sensor 3 on the mounting seat 2 can be disengaged from the gearbox to be detected. Furthermore, it is convenient for the detection of the next gearbox.

[0066] In this way, the structure of the L-shaped detection frame 1 is relatively simple, the manufacturing difficulty is low, and at the same time, it is beneficial to realize the action that when the pushing block 4 approaches the vertical extension portion 11, the connecting member 5 drives the mounting seat 2 to approach the lateral extension portion 12.

[0067] In one example, referring to Figure 2 shown, the first guiding structure 111 is a strip-shaped through hole penetrating the first side and the second side of the vertical extension portion 11, and the mounting seat 2 is movably assembled in the strip-shaped through hole. Since the strip-shaped through hole penetrates the first side and the second side of the vertical extension portion 11, therefore, the connecting member 5 can pass through the strip-shaped through hole and be connected to the mounting seat 2, or, in Figure 5 it, a part of the mounting seat 2 passes through the strip-shaped through hole and is located on the second side of the vertical extension portion 11, so as to facilitate the connection between the connecting member 5 and the mounting seat 2.

[0068] For example Figure 5As shown, the mounting base 2 may have a third guiding structure 22. The third guiding structure 22 may be guiding grooves located on opposite sides of the third guiding structure 22. The two guiding grooves are nested on opposite side walls of the strip-shaped through hole, so that the mounting base 2 can slide along the first guiding structure 111 through the cooperation of the two guiding grooves and the strip-shaped through hole.

[0069] In one example, referring to Figure 2 As shown, the second guiding structure 121 is a guiding groove recessed in the first upper surface 1231. The pushing block 4 is movably assembled in the guiding groove, and at least a part of the pushing block 4 protrudes from the first upper surface 1231. Thus, it can be avoided that the second guiding structure 121 obstructs the transmission on the first upper surface 1231. At the same time, it is beneficial to reduce the weight of the automotive transmission NVH off-line detection device.

[0070] For example Figure 3 And in combination with Figure 2 As shown, the pushing block 4 may have a fourth guiding structure 43. In Figure 3 the fourth guiding structure 43 may be two rod-shaped protrusions. The two rod-shaped protrusions are respectively located on opposite sides of the pushing block 4. Two opposite side walls of the guiding groove have two limiting grooves 1211 extending in the second direction. The two rod-shaped protrusions respectively extend into one limiting groove 1211 and cooperate with the corresponding limiting groove 1211, so that the pushing block 4 is movably assembled on the second guiding structure 121. And the first elastic member 41 may be two compression springs. The compression springs correspond to the two rod-shaped protrusions of the fourth guiding structure 43 one by one. The two compression springs are respectively located in one limiting groove 1211, and both ends of the compression springs are respectively fixedly connected to a side wall of the corresponding limiting groove 1211 close to the vertical extension 11 and the corresponding rod-shaped protrusion. Thus, the two compression springs can push the two rod-shaped protrusions, and further push the pushing block 4 to move along the second direction toward the side away from the vertical extension 11.

[0071] In one example, the sizes of transmissions of different automobiles may vary. Some automotive transmission NVH off-line detection devices in the prior art can only detect transmissions with fixed sizes, or require more adjustment steps. Therefore, the NVH sensor 3 is configured to be selectively movable along the first direction on the mounting base 2. Referring to Figure 5 And in combination with Figure 1 As shown, the automotive transmission NVH off-line detection device may have a rod-shaped fixing member 8. For example, the fixing member 8 may be a bolt, a pin or a screw, etc. The NVH sensor 3 may have a fixing base 31. Both the mounting base 2 and the fixing base 31 have mounting holes 21. Among them, the number of mounting holes 21 of the mounting base 2 is multiple, and the multiple mounting holes 21 of the mounting base 2 are spaced along the first direction. For example, in Figure 5Among them, the number of mounting holes 21 of the mounting base 2 can be four, but the number of mounting holes 21 of the mounting base 2 can also be three, five, six, etc. The mounting base 31 has at least one mounting hole 21. For example, in Figure 5 Among them, the number of mounting holes 21 of the fixing base 31 can be one, but the number of mounting holes 21 of the fixing base 31 can also be two, three, four, etc.

[0072] In this embodiment, taking Figure 5 as an example, the number of mounting holes 21 of the mounting base 2 shown is four, and the number of mounting holes 21 of the fixing base 31 is one. In this way, the rod-shaped fixing member 8 can sequentially pass through the mounting hole 21 of the fixing base 31 and one mounting hole 21 of the mounting base 2, so as to realize the detachable connection between the fixing base 31 and the mounting base 2 through the fixing member 8. Moreover, through the mounting hole 21 of the mounting base 2 penetrated by the rod-shaped fixing member 8, the position where the fixing base 31 is fixed on the mounting base 2 can be changed.

[0073] Thus, the distance between the NVH sensor 3 and the first upper surface 1231 can be changed, so that the automotive transmission NVH offline detection device can be applicable to the NVH offline detection of transmissions of different sizes.

[0074] In one example, referring to Figure 1 as shown, the lateral extension portion 12 is plate-shaped. In this way, since the plate-shaped lateral extension portion 12 has a relatively low height, it is beneficial to reduce the physical strength consumed by the operator to place the transmission, and it is easy to place the transmission on the first upper surface 1231 of the lateral extension portion 12. Especially when the lateral extension portion 12 includes a connected support section 123 and a loading section 124, the transmission can be more easily pushed from the second upper surface 1241 of the loading section 124 to the first upper surface 1231 of the support section 123, which is beneficial to improving the efficiency of the automotive transmission NVH offline detection.

[0075] In one example, referring to Figure 1 as shown, the automotive transmission NVH offline detection device further includes at least four support pads 7, and at least four support pads 7 are respectively installed at least at the four corners on the lower side of the lateral extension portion 12. Thus, through the arrangement of the support pads 7, on the one hand, it is beneficial to the stable placement of the automotive transmission NVH offline detection device. Especially in the case where the ground is slightly uneven, it can provide favorable conditions for the stable placement of the automotive transmission NVH offline detection device. On the other hand, for the plate-shaped lateral extension portion 12, it can also play a certain buffering role, which is beneficial to avoiding damage to the lateral extension portion 12 due to the extrusion force brought by the transmission and the ground frequently.

[0076] In an embodiment of the present disclosure, first place the gearbox to be detected on the first upper surface 1231 of the horizontal extension portion 12 on the side of the pushing block 4 away from the vertical extension portion 11, and then move the gearbox towards the vertical extension portion 11. Since at least a part of the pushing block 4 is higher than the first upper surface 1231 of the horizontal extension portion 12, the gearbox can abut against the pushing block 4 and push the pushing block 4 towards the vertical extension portion 11, thereby driving the mounting seat 2 towards the horizontal extension portion 12, so that the NVH sensor 3 on the mounting seat 2 can approach and contact the gearbox to perform NVH off-line detection on the gearbox.

[0077] Moreover, when the pushing block 4 approaches the vertical extension portion 11, the first elastic member 41 will deform. Therefore, after the detection is completed, by moving the gearbox in a direction away from the vertical extension portion 11, the first elastic member 41 can recover its deformation, thereby driving the pushing block 4 and the mounting seat 2 to reset, and the NVH sensor 3 disengages from the gearbox to be detected, facilitating the detection of the next gearbox.

[0078] Thus, the steps for the automotive gearbox NVH off-line detection device to perform NVH off-line detection on the gearbox are relatively simple, so the efficiency of automotive gearbox NVH off-line detection can be improved.

[0079] It should be noted that the terms "first", "second", etc. in the description and claims of the present disclosure are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present disclosure can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually of the same type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the associated objects before and after.

[0080] The above are only the preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. An off-line detection device for the NVH of an automotive transmission, characterized in that, The automobile gearbox NVH offline detection device comprises an L-shaped detection frame (1), a mounting seat (2), an NVH sensor (3), a push block (4), a first elastic member (41) and a connecting member (5); the L-shaped detection frame (1) comprises a vertical extension portion (11) and a horizontal extension portion (12) connected to each other; The vertically extending portion (11) has a first guide structure (111), the first guide structure (111) extends along a first direction, the mounting seat (2) is movably mounted on the first guide structure (111), and the NVH sensor (3) is mounted on the mounting seat (2), wherein the first direction is a direction approaching or moving away from the lateral extending portion (12); The lateral extension portion (12) has a second guide structure (121), the second guide structure (121) extends along a second direction, the push block (4) is movably mounted on the second guide structure (121), and is biased by the first elastic member (41) to be away from the vertical extension portion (11), at least a portion of the push block (4) is higher than a first upper surface (1231) of the lateral extension portion (12) located on the inner side of the L-shaped detection frame (1), wherein the second direction is a direction approaching or away from the vertical extension portion (11); The first end and the second end of the connecting member (5) are rotatably connected to the mounting seat (2) and the pushing block (4) respectively, and when the pushing block (4) approaches the vertical extension portion (11), the second end of the connecting member (5) gradually moves away from the L-shaped detection frame (1), so that the connecting member (5) drives the mounting seat (2) to approach the horizontal extension portion (12).

2. The automotive transmission NVH off-line detection device according to claim 1, wherein, The automobile gearbox NVH offline detection device also includes a limit block (6) and a second elastic member (61); The transverse extension portion (12) further comprises a receiving groove (122), wherein the receiving groove (122) is located on a side of the first guide structure (111) away from the vertical extension portion (11); The limiting block (6) is movably assembled in the accommodating groove (122) and is biased by the second elastic member (61) to extend out of the accommodating groove (122) and be located on a side of the pushing block (4) away from the vertical extension portion (11) along the second direction.

3. The NVH off-line detection device for an automotive transmission according to claim 2, wherein The transverse extension portion (12) comprises a supporting section (123) and a feeding section (124) connected to each other, and the first upper surface (1231) is the upper surface of the supporting section (123); The support section (123) is connected to the vertical extension portion (11), and the first guide structure (111) is located on the support section (123); The feeding section (124) is located on a side of the first guide structure (111) away from the vertical extension portion (11) along the second direction, and a second upper surface (1241) of the feeding section (124) extends obliquely from the first upper surface (1231) to the ground along the second direction; The receiving groove (122) is located on the supporting section (123) or the loading section (124).

4. The NVH off-line detection device for an automotive transmission according to claim 3, characterized in that, The limiting block (6) has a guiding inclined surface (62) on a side facing away from the vertical extension portion (11) along the second direction; wherein, when the limiting block (6) extends out of the receiving groove (122), at least a part of the guiding inclined surface (62) can be located outside the receiving groove (122); when the guiding inclined surface (62) receives a force along the second direction towards the vertical extension portion (11), the limiting block (6) is forced to retract into the receiving groove (122).

5. The NVH off-line detection device for an automotive transmission according to claim 1, wherein The included angle between the vertical extension portion (11) and the horizontal extension portion (12) is less than or equal to 90°, and the vertical extension portion (11) extends along the first direction, and the horizontal extension portion (12) extends along the second direction; The pushing block (4) and the NVH sensor (3) are both located on the first side of the vertical extension portion (11). The pushing block (4) has a connecting portion (42), and the connecting portion (42) extends to the second side of the vertical extension portion (11), and a part of the connecting portion (42) located on the second side of the vertical extension portion (11) is rotatably connected to the connecting member (5); wherein, the first side and the second side of the vertical extension portion (11) are respectively located on opposite sides of the vertical extension portion (11) along the second direction.

6. The NVH off-line detection device for an automotive transmission according to claim 5, characterized in that, The first guiding structure (111) is a strip-shaped through hole penetrating through the first side and the second side of the vertical extension portion (11), and the mounting seat (2) is movably assembled in the strip-shaped through hole.

7. The NVH off-line detection device for an automotive transmission according to claim 1, wherein, The second guiding structure (121) is a guiding groove recessed in the first upper surface (1231), and the pushing block (4) is movably assembled in the guiding groove, and at least a part of the pushing block (4) protrudes from the first upper surface (1231).

8. The NVH off-line detection device for an automotive transmission according to claim 1, wherein, The NVH sensor (3) is configured to be selectively movable along the first direction on the mounting seat (2).

9. The NVH off-line detection device for an automotive transmission according to claim 1, characterized in that, The horizontal extension portion (12) is plate-shaped.

10. The NVH off-line detection device for an automotive transmission according to claim 1, characterized in that, The vehicle transmission NVH off-line detection device further includes at least four support pads (7), and the at least four support pads (7) are at least respectively mounted at the four corners on the lower side of the horizontal extension portion (12).

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