Powertrain suspension support and mounting method therefor

Abstract

A powertrain suspension support and a mounting method therefor. The powertrain suspension support comprises: a mounting bracket (1) comprising a bushing seat (11); a damping bushing assembly (2) comprising an inner bushing (21), a damping block (22) and an outer bushing (23), which are sequentially arranged from the inside out, wherein the damping bushing assembly (2) is mounted in the bushing seat (11); a first limiting mechanism (3), which is connected to the inner bushing (21) and is configured to limit the displacement of the inner bushing (21) in the axial direction of the damping bushing assembly (2); and a second limiting mechanism (4), which is connected to the outer bushing (23), is arranged on the bushing seat (11), and is configured to limit the displacement of the outer bushing (23) in the axial direction of the damping bushing assembly (2).

Description

POWERTRAIN MOUNT BRACKET AND MOUNTING METHOD THEREOF CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] The present application is based on and claims priority to CN Patent Application No. 202411817137.6 filed on December 10, 2024, the disclosure of which is incorporated by reference herein in its entirety. TECHNICAL FIELD

[0002] The present disclosure relates to the field of vehicle manufacturing, in particular to a powertrain mount bracket and a mounting method thereof. BACKGROUND

[0003] At present, in traditional fuel-engine automobiles, the powertrain mount bracket is mainly used to carry such members as the engine, the gearbox and the transfer case. The mount system effectively reduces the vibration and noise generated during operation of these members, which may improve the comfort and stability of the vehicle.

[0004] In some related technologies, the damper block in the mount bracket is generally formed of an elastomeric material, so that it is possible to result in that the damper block is torn and damaged when other parts connected with the damper block exert excessive axial force on the damper block. Since the electric drive system accelerates readily, it is possible to cause that the damping bushing is torn during the process of sudden acceleration and emergency braking of the vehicle, thereby affecting the service life of the bushing.  SUMMARY

[0005] In view of this, the present disclosure provides a powertrain mount bracket and a mounting method thereof, which may improve the service life of a damping bushing.

[0006] In one aspect of the present disclosure, a powertrain mount bracket is provided. The powertrain mount bracket comprises:

[0007] a mounting bracket including a bushing seat;

[0008] a damping bushing assembly including an inner bushing, a damper block and an outer bushing which are sequentially arranged from inside to outside, wherein the damping bushing assembly is mounted in the bushing seat;

[0009] a first limiting mechanism connected with the inner bushing, for limiting a displacement of the inner bushing in an axial direction of the damping bushing assembly; and

[0010] a second limiting mechanism connected with the outer bushing and arranged on the bushing seat, for limiting a displacement of the outer bushing in the axial direction of the damping bushing assembly.

[0011] In some embodiments, the powertrain mount bracket further comprises:

[0012] a connector passing through the inner bushing,

[0013] wherein the first limiting mechanism is fixedly connected with the connector and limits the inner bushing at at least one end of the inner bushing in an axial direction.

[0014] In some embodiments, the first limiting mechanism includes:

[0015] a first limiting member including a first through hole through which the connector passes, and fixedly abutting against the inner bushing in the axial direction; and

[0016] a second limiting member including a second through hole through which the connector passes, arranged between the first limiting member and the inner bushing, and abutting against the first limiting member and the inner bushing respectively.

[0017] In some embodiments, the second limiting member in the first limiting mechanism is a spacer of an optional specification, and the spacers of the respective specifications have different axial lengths.

[0018] In some embodiments, the first limiting member has a mounting portion for mounting the powertrain mount bracket to a vehicle frame.

[0019] In some embodiments, the mounting portion includes a pair of connecting holes perpendicular to the axial direction of the damping bushing assembly and arranged on both sides of the first through hole, wherein the pair of connecting holes mount the powertrain mount bracket to a vehicle frame through a threaded connector.

[0020] In some embodiments, the first limiting mechanism includes:

[0021] two groups of first limiting members and second limiting members, wherein one group of the first limiting members and the second limiting members are located on one side of the inner bushing in the axial direction of the damping bushing assembly, and the other group of the first limiting members and the second limiting members are located on the other side of the inner bushing in the axial direction of the damping bushing assembly.

[0022] In some embodiments, the connector includes:

[0023] a pin shaft including a threaded section and a tip, wherein the threaded section and the tip are located at two ends of the pin shaft.

[0024] In some embodiments, the connector further includes:

[0025] a locking mechanism configured to lock the first limiting member, the second limiting member and the inner bushing relative to the pin shaft, and including:

[0026] a nut arranged on the threaded section of the pin shaft and configured to lock the first limiting member, the second limiting member and the inner bushing relative to the pin shaft; and

[0027] a washer arranged between the first limiting member remote from the tip and the nut, abutting against the first limiting member and the nut respectively.

[0028] In some embodiments, the threaded section is provided with an anti-rotation pin hole, and the nut is provided with an anti-rotation pin groove configured to align with the anti-rotation pin hole when the nut is screwed into a predetermined position;

[0029] the locking mechanism further includes:

[0030] an anti-rotation pin passing through the anti-rotation pin groove and the anti-rotation pin hole at the same time, and configured to prevent a relative rotation of the nut and the pin shaft.

[0031] In some embodiments, the second limiting mechanism includes an end cover plate which is fixedly connected with the bushing seat and includes an axial flange fixedly abutting against the outer bushing; the bushing seat is provided with a blocking portion located at one end of the bushing seat remote from the end cover plate and fixedly abutting against the outer bushing.

[0032] In some embodiments, the end cover plate further includes a fastening through hole, and the bushing seat includes a fastening hole arranged parallel to an axial direction, so as to fixedly connect the end cover plate to the bushing seat by a fastener passing through the fastening through hole and the fastening hole.

[0033] In some embodiments, the first limiting mechanism includes:

[0034] a first limiting member having an H-shaped mounting portion for mounting the powertrain mount bracket to a vehicle frame;

[0035] wherein part of the fastener is located within an avoidance space formed by the mounting portion.

[0036] In some embodiments, the mounting bracket further includes a mounting bottom plate and a cushion block, wherein the mounting bottom plate is configured to be fixedly connected with a powertrain through the cushion block.

[0037] In some embodiments, the cushion block has an optional specification, and the cushion blocks of the respective specifications have different thicknesses.

[0038] In some embodiments, the mounting bracket further includes:

[0039] a plurality of mounting holes arranged on the mounting bottom plate in pairs;

[0040] two connecting ribs fixedly connected to the mounting bottom plate and forming lifting lugs for fixed connection with the bushing seat, wherein the two connecting ribs extend along a surface of the mounting bottom plate and extend across a spacing portion of each pair of mounting holes respectively; and

[0041] a lightening hole arranged on the mounting bottom plate and arranged between the two connecting ribs.

[0042] In another aspect of the present disclosure, a mounting method of the powertrain mount bracket is provided. The mounting method comprises:

[0043] providing the mounting bracket and the damping bushing assembly;

[0044] mounting the damping bushing assembly to the bushing seat of the mounting bracket;

[0045] mounting the first limiting mechanism and the second limiting mechanism to form the powertrain mount bracket;

[0046] mounting the powertrain mount bracket to a powertrain through the mounting bracket; and

[0047] connecting the powertrain mount bracket with a vehicle frame so as to mount the powertrain on the vehicle frame.

[0048] In some embodiments, the mounting method further comprises:

[0049] fixedly connecting the first limiting mechanism with the connector, and causing the connector to pass through the inner bushing upon mounting of the first limiting mechanism.

[0050] Therefore, according to the embodiment of the present disclosure, the first limiting mechanism and the second limiting mechanism are provided so that the first limiting mechanism and the second limiting mechanism may limit the axial displacement of the inner bushing and the outer bushing when the powertrain is driven to perform axial displacement due to inertia resulting from a circumstance such as sudden acceleration or emergency braking of the vehicle, so as to effectively reduce the deformation of the damper block between the inner bushing and the outer bushing, thereby preventing that the damper block is torn.  BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The accompanying drawings which constitute part of this specification, describe the embodiments of the present disclosure, and together with this specification, serve to explain the principles of the present disclosure.

[0052] The present disclosure may be more explicitly understood from the following detailed description with reference to the accompanying drawings, in which:

[0053] Fig. 1 is a schematic sectional view of some embodiments of the powertrain mount bracket according to the present disclosure;

[0054] Fig. 2 is a local schematic sectional view of Fig. 1;

[0055] Fig. 3 is a schematic sectional view of a damping bushing assembly in some embodiments of the powertrain mount bracket according to the present disclosure;

[0056] Fig. 4 is a schematic view of a first limiting member in some embodiments of the powertrain mount bracket according to the present disclosure;

[0057] Fig. 5 is an exploded schematic view of some embodiments of the powertrain mount bracket according to the present disclosure;

[0058] Fig. 6 is a schematic view of some embodiments of the powertrain mount bracket according to the present disclosure which is connected with a powertrain;

[0059] Fig. 7 is a schematic view of some embodiments of the powertrain mount bracket according to the present disclosure which is connected with a powertrain and mounted to a vehicle frame;

[0060] Fig. 8 is a flowchart of some embodiments of the mounting method of a powertrain mount bracket according to the present disclosure;

[0061] It should be understood that, the dimensions of various parts shown in the accompanying drawings are not drawn according to actual proportional relations. In addition, the same or similar members are denoted by the same or similar reference numerals.

[0062] List of reference numerals:100-powertrain mount bracket; 200-powertrain; 300-vehicle frame;1-mounting bracket; 11-bushing seat; 12-mounting bottom plate; 13-cushion block; 14-mounting hole; 15-connecting rib; 16-lightening hole;2-damping bushing assembly; 21-inner bushing; 22-damper block; 23-outer bushing;3-first limiting mechanism; 31-first limiting member; 311-first through hole; 312-connecting hole; 313-avoidance space; 32-second limiting member; 321-second through hole;4-second limiting mechanism; 41-end cover plate; 42-blocking portion; 43-fastener;5-connector; 51-pin shaft; 511-threaded section; 512-tip; 53-nut; 54-washer; 55-anti-rotation pin. DETAILED DESCRIPTION

[0063] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative but in no way intended as limiting the present disclosure and its application or use. The present disclosure which may be implemented in many different forms, are not limited to the embodiments described here. These embodiments are provided to make the present disclosure thorough and complete, and adequately convey the scope of the present disclosure to those skilled in the art. It should be noted that: the relative arrangements of members and steps, the components of materials, the numerical expressions and the values elaborated in these embodiments, should be construed as merely illustrative rather than restrictive unless otherwise specified.

[0064] The use of the words “first”, “second” and the like in the present disclosure do not represent any sequence, quantity or significance, but are only intended to distinguish different parts. Similar words such as “comprise” and “include” mean that the element before the word covers the element listed after the word without excluding the possibility of also covering other elements. The words such as “up”, “down”, “left” and “right”, are used only to represent a relative positional relationship, which might also vary correspondingly when the absolute position of the described object changes.

[0065] In the present disclosure, when it is described that a particular device is located between the first device and the second device, there may or may not be an intermediate device between the particular device and the first device or the second device. When it is described that a particular device is connected to other devices, the particular device may be directly connected to said other devices without an intermediate device, and may also not be directly connected to said other devices but with an intermediate device.

[0066] All the terms (including technical terms and scientific terms) used in the present disclosure have the same meanings as understood by those of ordinary skill in the art to which the present disclosure belongs unless otherwise particularly defined. It should also be understood that, the terms defined in, for example, general dictionaries, should be construed as having meanings that are consistent with their meanings in the context of the relevant art, but not construed in an idealized or extremely formalized sense unless specifically thus defined here. The techniques, methods, and devices known to those of ordinary skill in the relevant art might not be discussed in detail. However, the techniques, methods, and devices shall be considered as part of the specification where appropriate.

[0067] In some related technologies, the damper block in the mount bracket is generally formed of an elastomeric material, so that it is possible to result in that the damper block is torn and damaged when other parts connected with the damper block exert excessive axial force on the damper block. Since the electric drive system accelerates readily, it is possible to cause that the damping bushing is torn during the process of sudden acceleration and emergency braking of the vehicle, thereby affecting the service life of the bushing.

[0068] It has been found through studies that, the damping bushing in the powertrain mount bracket is not axially limited in the related art, which results in that the damping bushing is torn.

[0069] In view of this, the present disclosure provides a powertrain mount bracket and a mounting method thereof, which may improve the service life of a damping bushing.

[0070] Fig. 1 is a schematic sectional view of some embodiments of the powertrain mount bracket according to the present disclosure, Fig. 2 is a local schematic sectional view of Fig. 1, and Fig. 3 is a schematic sectional view of a damping bushing assembly in some embodiments of the powertrain mount bracket according to the present disclosure.

[0071] Referring to Figs. 1 to 3, in some embodiments of the present disclosure, a powertrain mount bracket 100 is provided. The powertrain mount bracket 100 comprises a mounting bracket 1 including a bushing seat 11; a damping bushing assembly 2 including an inner bushing 21, a damper block 22 and an outer bushing 23 which are sequentially arranged from inside to outside, wherein the damping bushing assembly 2 is mounted in the bushing seat 11; a first limiting mechanism 3 connected with the inner bushing 21, for limiting a displacement of the inner bushing 21 in an axial direction of the damping bushing assembly 2; and a second limiting mechanism 4 connected with the outer bushing 23 and arranged on the bushing seat 11, for limiting a displacement of the outer bushing 23 in the axial direction of the damping bushing assembly 2.

[0072] In this embodiment, the first limiting mechanism 3 and the second limiting mechanism 4 limit the axial displacements of the inner bushing 21 and the outer bushing 23, so that even when the vehicle is in sudden acceleration and emergency braking, the powertrain 200 cannot drive the powertrain mount bracket 100 to cause the inner bushing 21 and the outer bushing 23 to perform excessive displacement, thereby reducing the deformation of the damper block 22 between the inner bushing 21 and the outer bushing 23, and preventing that the damper block 22 is torn and prolonging the service life of the damping bushing assembly 2.

[0073] Referring to Fig. 2, in order to limit the inner bushing 21, in some embodiments, the powertrain mount bracket 100 comprises a connector 5 passing through the inner bushing 21, wherein the first limiting mechanism 3 is fixedly connected with the connector 5 and limits the inner bushing 21 at at least one end of the inner bushing 21 in an axial direction.

[0074] The first limiting mechanism 3 is fixedly connected with the connector 5, so that it is possible to ensure the axial positioning of the first limiting mechanism 3 itself, so as to provide a stable axial limiting function for the inner bushing 21. In the case where the axial ends of the inner bushing 21 are both required to be limited, the first limiting mechanism 3 limits the axial right end and left end of the inner bushing 21 at the same time. When the axial left end or right end of the inner bushing 21 is not required to be limited, for example, in the case where the axial left end or right end of the inner bushing 21 has been fixedly connected, the first limiting mechanism 3 limits the axial right end or left end of the inner bushing 21. With such arrangement, it is possible to ensure that the axial ends of the inner bushing 21 are both limited.

[0075] Referring to Fig. 2, in some embodiments, the first limiting mechanism 3 includes a first limiting member 31 including a first through hole 311 through which the connector 5 passes, and fixedly abutting against the inner bushing 21 in the axial direction. The first limiting mechanism 3 also includes a second limiting member 32 including a second through hole 321 through which the connector 5 passes, arranged between the first limiting member 31 and the inner bushing 21 and abutting against the first limiting member 31 and the inner bushing 21 respectively.

[0076] In this way, the first limiting member 31, the second limiting member 32 and the inner bushing 21 are all sleeved on the connector 5. Since the first limiting member 31 and the second limiting member 32 are fixedly connected with the connector 5, the inner bushing 21 when subjected to an axial force will be limited by the first limiting member 31 and the second limiting member 32 so that it is impossible to perform axial displacement.

[0077] Referring to Fig. 3, in some embodiments, the inner bushing 21 of the damping bushing assembly 2 may be a cylinder with a central through hole, and the shape of the radially inner surface of the damper block 22 matches the shape of the radially outer surface of the inner bushing 21, and the shape of the radially inner surface of the outer bushing 23 matches the shape of the radially outer surface of the damper block 22.

[0078] In some embodiments, the radially outer surface of the damper block 22 is provided with a first convex portion, the radially inner surface of the damper block 22 is provided with a second convex portion, the radially inner surface of the outer bushing 23 is provided with a first concave portion, the first convex portion is embedded in the first concave portion, and the radially outer surface of the inner bushing 21 is provided with a second concave portion, and the second convex portion is embedded in the second concave portion. The inner bushing 21, the damper block 22 and the outer bushing 23 are arranged such that it is possible to partially embed the damper block 22 in the inner bushing 21 and the outer bushing 23. When subjected to an axial force, the damper block 22 is not likely to be disengaged from a space defined by the inner bushing 21 and the outer bushing 23.

[0079] In some related technologies, the mount bracket is usually connected with the vehicle frame through a subframe. Usually, such arrangement occupies a large chassis arrangement space, with single form and poor adaptability. Different power components are required to be matched by different mount brackets, so that it is extremely inconvenient in mounting and time-consuming and laborious. With the presence of the subframe, it is also possible to increase the weight of the whole vehicle.

[0080] Fig. 4 is a schematic view of a first limiting member in some embodiments of the powertrain mount bracket according to the present disclosure, and Fig. 7 is a schematic view of some embodiments of the powertrain mount bracket according to the present disclosure which is connected with a powertrain and mounted to a vehicle frame.

[0081] Referring to Figs. 4 and 7, in some embodiments, the first limiting member 31 has a mounting portion for mounting the powertrain mount bracket 100 to a vehicle frame 300.

[0082] In some embodiments, the mounting portion includes a pair of connecting holes 312 perpendicular to the axial direction of the damping bushing assembly 2 and arranged on both sides of the first through hole 311, wherein the pair of connecting holes 312 mount the powertrain mount bracket 100 to a vehicle frame 300 through a threaded connector.

[0083] According to different mounting positions of the vehicle frame 300, the pair of connecting holes 312 may be, for example, arranged on the upper and lower sides or the left and right sides of the first through hole 311. The threaded connector may be, for example, a bolt, and the connecting hole 312 and the threaded seat on the vehicle frame 300 are tightened according to a specified torque during the mounting.

[0084] With such first limiting member 31, the powertrain mount bracket 100 may be directly connected with the vehicle frame 300, which reduces the dependence of the powertrain mount bracket on the subframe in some related technologies, and is conducive to saving the mounting space when a subframe is not provided. Moreover, when the powertrain mount bracket 100 is mounted or removed, it is only necessary to mount or remove the threaded connector, so that the mounting and removal are very convenient, time-saving and labor-saving, and save labor cost.

[0085] Referring to Fig. 4, in some embodiments, in order to reduce the machining difficulty, the first limiting member 31 is provided with bosses extending in the axial direction at the positions around the first through hole 311 on its two end faces respectively, which may reduce a contact area when the first limiting member 31 abuts against adjacent parts, and easily satisfy the flatness requirements of the end faces of the first limiting member 31 during the machining.

[0086] Referring to Figs. 1 and 2, in some embodiments, the second limiting member 32 is a spacer of an optional specification, and the spacers of the respective specifications have different axial lengths.

[0087] The second limiting member 32 is a spacer of an optional specification. By selecting spacers of different specifications, it is possible to adjust the position of the first limiting member 31 in the axial direction, so that the connecting hole 312 is adjusted in the axial direction to match the mounting position of the vehicle frame 300. This is beneficial to improve the adaptability of the powertrain mount bracket 100 to different vehicle frames 300 in the axial direction, further reduce the dependence of the powertrain mount bracket 100 on the subframe, and expand the application scenarios of the powertrain mount bracket 100.

[0088] In some embodiments, the first limiting mechanism 3 includes two groups of first limiting members 31 and second limiting members 32, wherein one group of the first limiting members 31 and the second limiting members 32 are located on one side of the inner bushing 21 in the axial direction of the damping bushing assembly 2, and the other group of the first limiting members 31 and the second limiting members 32 are located on the other side of the inner bushing 21 in the axial direction of the damping bushing assembly 2.

[0089] In some vehicle frames, a plurality of threaded seats are arranged in pairs, with a fixed distance between each pair of threaded seats in the axial direction. In order to adapt the connecting holes 312 of the two first limiting members 31 to the vehicle frame 300, it is necessary to adjust the axial distance between the two first limiting members 31 in the two groups of the first limiting members 31 and the second limiting members 32. In some embodiments, in the axial direction, the two first limiting members 31 include an inner bushing 21 and two second limiting members 32 therebetween, and the axial distance between the two first limiting members 31 may be adjusted by replacing the second limiting members 32 of different specifications, and the two second limiting members 32 may be spacers with the same length or spacers with different lengths. In this way, it is possible to further improve the adaptability of the powertrain mount bracket 100 to different vehicle frames.

[0090] Referring to Fig. 2, in some embodiments, the connector 5 includes a pin shaft 51 including a threaded section 511 and a tip 512, wherein the threaded section 511 and the tip 512 are located at two ends of the pin shaft 51.

[0091] The rod section of the pin shaft 51 between the threaded section 511 and the tip 512 is configured to sleeve the first limiting member 31, the second limiting member 32 and the inner bushing 21. During the mounting, the tip 512 abuts against the first limiting member 31, for example, abutting against the boss on the end face of the first limiting member 31 in Fig. 2.

[0092] In some embodiments, the connector 5 further includes a locking mechanism for locking the first limiting member 31, the second limiting member 32 and the inner bushing 21 relative to the pin shaft 51. The locking mechanism includes a nut 53 and a washer 54, wherein the nut 53 is arranged on the threaded section 511 of the pin shaft 51 for locking the first limiting member 31, the second limiting member 32 and the inner bushing 21 relative to the pin shaft 5, and the washer 54 is arranged between the first limiting member 31 remote from the tip 512 and the nut 53, and abuts against the first limiting member 31 and the nut 53 respectively.

[0093] Since the locking mechanism has the nut 53 and the washer 54, when the nut 53 is tightened, it is possible to lock the first limiting member 31, the second limiting member 32 and the inner bushing 21 relative to the pin shaft 51, so as to axially limit the inner bushing 21. The washer 54 is arranged between the first limiting member 31 remote from the tip 512 and the nut 53, and abuts against the first limiting member 31 and the nut 53 respectively. The washer 54 may provide a flat contact surface and uniformly disperse a pressure exerted by the nut 53, so as to reduce local stress concentration of the first limiting member 31 and the nut 53.

[0094] In order to prevent the relative rotation of the nut 53 and the pin shaft 51, in some embodiments, the threaded section 511 is provided with an anti-rotation pin hole, and the nut 53 is provided with an anti-rotation pin groove configured to align with the anti-rotation pin hole when the nut 53 is screwed into a predetermined position. The locking mechanism also includes an anti-rotation pin 5 passing through the anti-rotation pin groove and the anti-rotation pin hole at the same time to prevent a relative rotation of the nut 53 and the pin shaft 51.

[0095] During the operation process, the nut 53 might rotate relative to the pin shaft 51 due to the influence of the powertrain 200 or other vibrations, so as to be disengaged from a predetermined position. The anti-rotation pin 55 is arranged in such a way that the nut 53 may be locked by the anti-rotation pin 55 when rotating relative to the pin shaft 51, so that it is impossible to be disengaged from a predetermined position, thereby realizing the function of preventing that the nut 53 is loosened. In Figs. 1, 2 and 5, the anti-rotation pin groove is arranged at the axial end of the nut 53. It should be understood that, the anti-rotation pin groove may also be in other forms, for example, in the form of a complete through hole arranged at the axial intermediate portion of the nut 53.

[0096] When sudden acceleration or emergency braking of the vehicle occurs, the inertial influence of the powertrain 200 is transferred to the outer bushing 23 through the bushing seat 11. In order to axially limit the outer bushing 23, referring to Fig. 2, in some embodiments, the second limiting mechanism 4 includes an end cover plate 41 which is fixedly connected with the bushing seat 11 and includes an axial flange fixedly abutting against the outer bushing 23; the bushing seat 11 is provided with a blocking portion 42 located at one end of the bushing seat 11 remote from the end cover plate 41 and fixedly abutting against the outer bushing 23.

[0097] The axial position of the end cover plate 41 itself may be limited by fixedly connecting the end cover plate 41 with the bushing seat 11, so as to provide a stable limiting function for the outer bushing 23. One end of the outer bushing 23 in the axial direction fixedly abuts against the end cover plate 41, and the other end fixedly abuts against the blocking portion 42. In this way, the outer bushing 23 when subjected to an axial force will be limited within the axial range defined by the end cover plate 41 and the blocking portion 42, so that it is impossible to result in that the damper block 22 is torn due to disengagement from the axial range and excessive displacement. Moreover, both ends of the outer bushing 23 fixedly abut against each other, so that the outer bushing 23 when subjected to an axial force may not have axial play which may lead to occlusion with the second limiting mechanism 4 to cause damage or produce noise. The end cover plate 41 may be a complete loop or provided with an opening, or may be jointly formed by a plurality of discontinuous parts.

[0098] In some embodiments, in order to form a fixed connection between the end cover plate 41 and the bushing seat 11, the end cover plate 41 further includes a fastening through hole, and the bushing seat 11 includes a fastening hole arranged parallel to an axial direction, so as to fixedly connect the end cover plate 41 to the bushing seat 11 by a fastener 43 passing through the fastening through hole and the fastening hole.

[0099] The fastening hole may be a blind hole or a through hole, and the fastener 43 is screwed into the fastening through hole and then screwed into the fastening hole so as to fixedly connect the end cover plate 41 to the bushing seat 11. The fastener 43 may be, for example, a screw. The fastening through hole, the fastening hole and the fastener 43 are arranged in the circumferential direction, and the numbers and the distribution positions are not limited.

[00100] Referring to Fig. 4, in some embodiments, the first limiting mechanism 3 includes a first limiting member 31 having an H-shaped mounting portion for mounting the powertrain mount bracket 100 to the vehicle frame 300. Wherein, part of the fastener 43 is located within an avoidance space 313 formed by the mounting portion.

[00101] Since the end cover plate 41 is fixedly connected to the bushing seat 11 by the fastener 43, the fastener 43 might be partially located outside the end cover plate 41 and the bushing seat 11. The first limiting member 31 is provided with a mounting portion so that it has a large volume, which results in that the fastener 43 might interfere with the first limiting member 31. By forming the avoidance space 313 on the mounting portion, it is possible to avoid such occurrence.

[00102] In Fig. 4, the mounting portion includes two lateral portions arranged in parallel and an intermediate portion located between the two lateral portions, wherein the intermediate portion is arranged in the middle of the two lateral portions in the length direction, and the lateral portions and the intermediate portion define an avoidance space on both sides of the intermediate portion respectively. It should be understood that, the position and shape of the avoidance space 313 may be adjusted according to the positions and shapes of the fastener 43 and the first limiting member 31.

[00103] Fig. 5 is an exploded schematic view of some embodiments of the powertrain mount bracket according to the present disclosure, and Fig. 6 is a schematic view of some embodiments of the powertrain mount bracket according to the present disclosure which is connected with a powertrain.

[00104] Referring to Fig. 5, in some embodiments, the mounting bracket 1 further includes a mounting bottom plate 12 and a cushion block 13, wherein the mounting bottom plate 12 is configured to be fixedly connected with a powertrain 200 through the cushion block 13.

[00105] In some vehicles, after the powertrain mount bracket is fixedly connected with the powertrain, there is a clearance with the threaded seat of the vehicle frame in the width direction, so that it is impossible to be mounted to the vehicle frame. Since the powertrain mount bracket 100 fixedly connects the mounting bottom plate 12 with the powertrain 200 through the cushion block 13, it is possible to fill the above-described clearance between the vehicle frame 300 and the powertrain 200, so that the powertrain mount bracket 100 connected with the powertrain 200 may be connected to the vehicle frame 300. The cushion block 13 is provided with a mounting through hole in the thickness direction.

[00106] In some embodiments, the cushion block 13 has an optional specification, and the cushion blocks 13 of the respective specifications have different thicknesses.

[00107] The cushion block 13 of an appropriate specification may be selected according to the dimensions of the vehicle frame 300 and the powertrain 200, so that the cushion block 13 fits against the powertrain 200 after mounting, thereby providing a stable connection between the powertrain 200 and the powertrain mount bracket 100.

[00108] In some embodiments, the mounting bracket 1 further includes: a plurality of mounting holes 14 arranged on the mounting bottom plate 12 in pairs; two connecting ribs 15 fixedly connected to the mounting bottom plate 12 and forming lifting lugs for fixed connection with the bushing seat 11, wherein the two connecting ribs 15 extend along a surface of the mounting bottom plate 12 and extend across a spacing portion of each pair of mounting holes 14 respectively; and a lightening hole 16 arranged on the mounting bottom plate 12 and arranged between the two connecting ribs 15.

[00109] Referring to Figs. 5 and 6, the plurality of mounting holes 14 are arranged on the mounting bottom plate 12 in pairs, and matched with the suspension mounting holes of the powertrain 200, which may form a more stable connection, and reduce shaking or looseness after mounting.

[00110] The lug formed by the connecting rib 15 may be a complete loop or provided with an opening, and the length of the lug may be adjusted according to the dimensions of the vehicle frame 300 and the powertrain 200 to match the clearance between the vehicle frame 300 and the powertrain 200.

[00111] The two connecting ribs 15 extend along a surface of the mounting bottom plate, which is beneficial to enhance the overall rigidity of the mounting bottom plate 12. The two connecting ribs 15 extend across a spacing portion of each pair of mounting holes 14 respectively, which may provide additional support between the two mounting holes 14.

[00112] The lightening hole 16 of the mounting bracket 1 may be, for example, a through hole, which is arranged on the mounting bottom plate 12 and arranged between the two connecting ribs 15, for eliminating redundant materials, which is beneficial to reduce the weight of the powertrain mount bracket 100.

[00113] The structural forms of the mounting hole 14, the mounting bottom plate 12, the cushion block 13 and the connecting rib 15 on the mounting bracket 1 may be adjusted according to the positions of the suspension mounting holes on different power assemblies, for mounting different power assemblies so as to be adapted to different types of power assemblies 200 and vehicle frames 300.

[00114] Fig. 8 is a flowchart of some embodiments of the mounting method of a powertrain mount bracket according to the present disclosure. Referring to Fig. 8, the embodiment of the present disclosure provides a mounting method of a powertrain mount bracket. The method comprises:

[00115] Step S1: providing the mounting bracket 1 and the damping bushing assembly 2;

[00116] Step S2: mounting the damping bushing assembly 2 to the bushing seat 11 of the mounting bracket 1;

[00117] Step S3: mounting the first limiting mechanism 3 and the second limiting mechanism 4 to form the powertrain mount bracket 100;

[00118] Step S4: mounting the powertrain mount bracket 100 to a powertrain 200 through the mounting bracket 1; and

[00119] Step S5: connecting the powertrain mount bracket 100 with a vehicle frame 300 so as to mount the powertrain 200 on the vehicle frame 300.

[00120] It should be understood that, the mounting method of a powertrain mount bracket includes assembling the components, and also includes mounting the same to the vehicle frame and the powertrain. Assembling the components includes steps S1-S3, and mounting the same to the vehicle frame and the powertrain includes steps S4-S5.

[00121] When the components of the powertrain mount bracket 100 are mounted, it is possible to first provide the mounting bracket 1 and the damping bushing assembly 2. The fixed connection between respective components of the mounting bracket 1 preferably uses connection by welding, such that it is possible to first weld the cushion block 13 with the mounting bottom plate 12, and then weld the two connecting ribs 15 with the mounting bottom plate 12. The two connecting ribs 15 are left with lifting lugs for welding with the bushing seat 11, and the mounting hole 14 on the mounting bottom plate 12 and the mounting through hole of the cushion block 13 are machined after welding according to the positions of the suspension mounting holes on both sides of the powertrain 200. It is possible to ensure the connection accuracy of the powertrain mount bracket 100 and the powertrain 200.

[00122] After welding of the mounting bracket 1 is completed, the damping bushing assembly 2 is pressed into the bushing seat 11, and the right side of the bushing seat 11 is provided with a blocking portion 42 which abuts against one axial end of the outer bushing 23 of the damping bushing assembly 2 for axially limiting the outer bushing 23 of the damping bushing assembly 2.

[00123] After the mounting of the damping bushing assembly 2 is completed, the first limiting mechanism 3 and the second limiting mechanism 4 are mounted to form the powertrain mount bracket 100. The end cover plate 41 is provided with a fastening through hole, and the left side of the bushing seat 11 is provided with a fastening hole. When the second limiting mechanism 4 is mounted, the end cover plate 41 is assembled with the fastening hole on the bushing seat 11 with the fastener 43, and the axial flange on the end cover plate 41 abuts against the other axial end of the outer bushing 23 of the damping bushing assembly 2 for axially limiting the outer bushing 23.

[00124] When the first limiting mechanism 3 is mounted, the first limiting member 31 is provided with a pair of connecting holes 312. First, the first limiting member 31 is inserted into the position of the tip 512 of the pin shaft 51, and the left and right sides of the first limiting member 31 are both provided with bosses, wherein the left boss of the first limiting member 31 abuts against the tip 512. Afterwards, the second limiting member 32 is inserted into the pin shaft 51, and the second limiting member 32 abuts against the right boss of the first limiting member 31. Then, the pin shaft 51 is inserted into the inner bushing 21 of the damping bushing assembly 2, so that the left second limiting member 32 fixedly abuts against the inner bushing 21 of the damping bushing assembly 2 for axially limiting the inner bushing 21 of the damping bushing assembly 2. Afterwards, the second limiting member 32, the first limiting member 31 and the washer 54 are inserted into the pin shaft 51 on the right side of the bushing seat 11 according to a temporal sequence, and then the nut 53 is inserted into the tail of the pin shaft 51 and tightened, so that the second limiting member 32 on the right side of the bushing seat 11 fixedly abuts against the right side of the inner bushing 21 of the damping bushing assembly 2 for axially limiting the inner bushing 21 of the damping bushing assembly 2. Finally, the anti-rotation pin 55 is inserted into the anti-rotation pin groove of the nut 53 and the anti-rotation pin hole of the threaded section 511 of the pin shaft 51 to produce the effect of preventing looseness.

[00125] After the mounting of the powertrain mount bracket 100 is completed, the powertrain mount bracket 100 and the suspension mounting hole of the powertrain 200 are tightened with a bolt according to a specified torque, and only the structural forms of the mounting bottom plate 12, the cushion block 13 and the connecting rib 15 may be required to be adjusted according to the positions of the suspension mounting holes on the powertrain 200, for mounting different powertrain mount brackets 100.

[00126] After the mounting of the powertrain mount bracket 100 and the powertrain 200 is completed, the powertrain 200 is lifted from the bottom of the vehicle frame 300 by an overhead crane, and the threaded connecting hole 312 on the first limiting member 31 on both sides of the powertrain mount bracket 100 is tightened with the threaded seat on the vehicle frame 300 through a bolt according to a specified torque, so that the mounting of the powertrain 200 and the vehicle frame 300 is completed.

[00127] The powertrain mount bracket 100 axially limits the inner bushing 21 and the outer bushing 23 of the damping bushing assembly 2, so as to reduce the possibility that the damper block 22 is torn and prolong the service life of the damper block 22 during the process of sudden acceleration and emergency braking of the vehicle. Moreover, the distance between the mounting holes 14 of the two powertrain mount brackets 100 on the cross beams on both sides of the vehicle frame 300 is adjusted by adjusting the thickness of the cushion block 13 and the length of the lug of the connecting rib 15, for matching the mounting of the powertrain 200 on the vehicle frames 300 with different widths, so as to improve the mounting adaptability of the powertrain mount bracket 100 in the width direction of the powertrain 200.

[00128] The axial distance between the connecting holes 312 of the first limiting members 31 at both ends of the first limiting mechanism 3 may be adjusted by selecting the second limiting members 32 with different lengths, so as to improve the mounting adaptability of the powertrain mount bracket 100 on different vehicle frames 300 in the axial direction.

[00129] When the powertrain 200 is removed from the vehicle frame 300, it is also only necessary to remove the bolt passing through the connecting hole 312. According to the embodiment of the present disclosure, the powertrain mount bracket 100 is directly connected with the vehicle frame 300 through a bolt when a subframe in some related technologies is omitted, which saves the mounting space so that the mounting and removal are very convenient, time-saving and labor-saving, and save labor cost.

[00130] Hereto, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details commonly known in the art have not been described. From the above descriptions, those skilled in the art may fully understand how to implement the technical solutions disclosed here.

[00131] Although some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for an illustrative purpose, rather than limiting the scope of the present disclosure. Those skilled in the art should understand that, it is possible to make amendments to the above embodiments or equivalent replacements to some of the technical features without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

 1. A powertrain mount bracket, comprising:a mounting bracket (1) including a bushing seat (11);a damping bushing assembly (2) including an inner bushing (21), a damper block (22) and an outer bushing (23) which are sequentially arranged from inside to outside, wherein the damping bushing assembly (2) is mounted in the bushing seat (11);a first limiting mechanism (3) connected with the inner bushing (21), for limiting a displacement of the inner bushing (21) in an axial direction of the damping bushing assembly (2); anda second limiting mechanism (4) connected with the outer bushing (23) and arranged on the bushing seat (11), for limiting a displacement of the outer bushing (23) in the axial direction of the damping bushing assembly (2).

2. The powertrain mount bracket according to claim 1, further comprising:a connector (5) passing through the inner bushing (21),wherein the first limiting mechanism (3) is fixedly connected with the connector (5) and limits the inner bushing (21) at at least one end of the inner bushing (21) in an axial direction.

3. The powertrain mount bracket according to claim 2, wherein the first limiting mechanism (3) includes:a first limiting member (31) including a first through hole (311) through which the connector (5) passes, and fixedly abutting against the inner bushing (21) in the axial direction; anda second limiting member (32) including a second through hole (321) through which the connector (5) passes, arranged between the first limiting member (31) and the inner bushing (21), and abutting against the first limiting member (31) and the inner bushing (21) respectively;and optionally wherein, the second limiting member (32) in the first limiting mechanism (3) is a spacer of an optional specification, and the spacers of the respective specifications have different axial lengths.

4. The powertrain mount bracket according to claim 3, wherein the first limiting member (31) has a mounting portion for mounting the powertrain mount bracket (100) to a vehicle frame (300);and optionally wherein, the mounting portion includes a pair of connecting holes (312) perpendicular to the axial direction of the damping bushing assembly (2) and arranged on both sides of the first through hole (311), wherein the pair of connecting holes (312) mount the powertrain mount bracket (100) to a vehicle frame (300) through a threaded connector.

5. The powertrain mount bracket according to claim 3, wherein the first limiting mechanism (3) includes:two groups of first limiting members (31) and second limiting members (32), wherein one group of the first limiting members (31) and the second limiting members (32) are located on one side of the inner bushing (21) in the axial direction of the damping bushing assembly (2), and the other group of the first limiting members (31) and the second limiting members (32) are located on the other side of the inner bushing (21) in the axial direction of the damping bushing assembly (2).

6. The powertrain mount bracket according to claim 2, wherein the connector (5) includes:a pin shaft (51) including a threaded section (511) and a tip (512), wherein the threaded section (511) and the tip (512) are located at two ends of the pin shaft (51);and optionally wherein, the connector (5) further includes:a locking mechanism configured to lock the first limiting member (31), the second limiting member (32) and the inner bushing (21) relative to the pin shaft (51), and including:a nut (53) arranged on the threaded section of the pin shaft (51) and configured to lock the first limiting member (31), the second limiting member (32) and the inner bushing (21) relative to the pin shaft (51); anda washer (54) arranged between the first limiting member (31) remote from the tip (512) and the nut (53), abutting against the first limiting member (31) and the nut (53) respectively.

7. The powertrain mount bracket according to claim 6, wherein the threaded section is provided with an anti-rotation pin hole, and the nut (53) is provided with an anti-rotation pin groove configured to align with the anti-rotation pin hole when the nut (53) is screwed into a predetermined position;the locking mechanism further includes:an anti-rotation pin (55) passing through the anti-rotation pin groove and the anti-rotation pin hole at the same time, and configured to prevent a relative rotation of the nut (53) and the pin shaft (51).

8. The powertrain mount bracket according to claim 1, wherein the second limiting mechanism (4) includes an end cover plate (41) which is fixedly connected with the bushing seat (11) and includes an axial flange fixedly abutting against the outer bushing (23); the bushing seat (11) is provided with a blocking portion (42) located at one end of the bushing seat (11) remote from the end cover plate (41) and fixedly abutting against the outer bushing (23);and optionally wherein, the end cover plate (41) further includes a fastening through hole, and the bushing seat (11) includes a fastening hole arranged parallel to an axial direction, so as to fixedly connect the end cover plate (41) to the bushing seat (11) by a fastener (43) passing through the fastening through hole and the fastening hole;and optionally wherein, the first limiting mechanism (3) includes:a first limiting member (31) having an H-shaped mounting portion for mounting the powertrain mount bracket (100) to a vehicle frame (300);wherein part of the fastener (43) is located within an avoidance space (313) formed by the mounting portion.

9. The powertrain mount bracket according to claim 1, wherein the mounting bracket (1) further includes a mounting bottom plate (12) and a cushion block (13), wherein the mounting bottom plate (12) is configured to be fixedly connected with a powertrain (200) through the cushion block (13);and optionally wherein, the cushion block (13) has an optional specification, and the cushion blocks (13) of the respective specifications have different thicknesses;and optionally wherein, the mounting bracket (1) further includes:a plurality of mounting holes (14) arranged on the mounting bottom plate (12) in pairs;two connecting ribs (15) fixedly connected to the mounting bottom plate (12) and forming lifting lugs for fixed connection with the bushing seat (11), wherein the two connecting ribs (15) extend along a surface of the mounting bottom plate (12) and extend across a spacing portion of each pair of mounting holes (14) respectively; anda lightening hole (16) arranged on the mounting bottom plate (12) and arranged between the two connecting ribs (15).

10. A mounting method of the powertrain mount bracket according to any one of claims 1 to 9, comprising:providing the mounting bracket (1) and the damping bushing assembly (2);mounting the damping bushing assembly (2) to the bushing seat (11) of the mounting bracket (1);mounting the first limiting mechanism (3) and the second limiting mechanism (4) to form the powertrain mount bracket (100);mounting the powertrain mount bracket (100) to a powertrain (200) through the mounting bracket (1); andconnecting the powertrain mount bracket (100) with a vehicle frame (300) so as to mount the powertrain (200) on the vehicle frame (300).  

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