A vehicle transmission suspension device and automobile

Abstract

The application relates to the technical field of gearboxes, in particular to a vehicle gearbox suspension device and an automobile. The device comprises a gearbox middle shell, at least one suspension main body and at least one suspension mounting rack; wherein the at least one suspension mounting rack is arranged on the suspension main body, a fixing bolt is arranged on the end of the suspension mounting rack, the end of the suspension mounting rack extends rearward along the X direction of the vehicle and is attached to the end surface of the gearbox middle shell in the X direction, and the end of the suspension mounting rack is connected to the end surface of the gearbox middle shell in the X direction through the fixing bolt; when the vehicle gearbox device is excited by vibration of a power assembly and / or road excitation during vehicle driving, the fixing bolt only bears radial load. The application changes the connection position of the suspension and the gearbox shell body, changes the connection mode of the bolt, and makes the fixing bolt only bear radial load when the vehicle gearbox suspension device is excited by vibration.

Description

Technical Field

[0001] The present invention relates to the technical field of gearboxes, and in particular to a vehicle gearbox suspension device and a vehicle. Background Art

[0002] The truck's powertrain system is supported on the vehicle frame by front and rear suspensions, which are mounted on housings such as the flywheel housing, clutch housing, transmission center housing, or rear housing.

[0003] In related technologies, the housing is generally made of aluminum alloy, the connection between the suspension and the housing is side-mounted, the gearbox middle housing is threaded, and the suspension bracket is fastened to the gearbox middle housing by fixing bolts. However, road excitation will be transmitted to the cylinder block and housing through the tires, leaf springs, frame and suspension, and the vibration of the powertrain system will also act on them. Therefore, the stress conditions of the cylinder block and housing at the suspension installation are the worst. During the operation of the car, it is easy for the fixing bolts to loosen or break, the gearbox middle housing to crack due to abnormal stress, or the threads to slip and fail. Therefore, ensuring the stable connection between the housing and the suspension has become a difficult problem that practitioners need to solve urgently. Summary of the Invention

[0004] In the related art, the stress condition of the housing at the suspension installation is poor, which causes the fixing bolts used for connection to become loose or break easily, and the gearbox housing is subjected to abnormal stress and cracks.

[0005] In a first aspect, an embodiment of the present application provides a vehicle transmission device, characterized in that it includes: a transmission middle housing, at least one suspension body, and at least one suspension mounting bracket; wherein,

[0006] At least one suspension mounting bracket is provided on the suspension body, a fixing bolt is passed through the end of the suspension mounting bracket, the end of the suspension mounting bracket extends rearward along the vehicle X-direction to abut against the end surface of the transmission middle housing in the X-direction, and the end of the suspension mounting bracket is connected to the end surface of the transmission middle housing in the X-direction via the fixing bolt, and when the vehicle transmission device is subjected to vibration excitation of the powertrain and / or excitation of the road surface during vehicle driving, the fixing bolt is only subjected to radial load.

[0007] In combination with the first aspect, in one embodiment, the axial direction of the fixing bolt is arranged perpendicular to the Z direction of the vehicle.

[0008] In conjunction with the first aspect, in one embodiment, the method further includes:

[0009] The transmission rear housing is partially fitted with the end surface of the transmission middle housing, and the transmission rear housing is connected to the transmission middle housing and the suspension mounting bracket via the fixing bolts.

[0010] In combination with the first aspect, in one embodiment, at least one first through hole is provided on the gearbox middle shell, and at least one second through hole is provided on the gearbox rear shell, each of the first through holes corresponds to a position of the second through hole, and the fixing bolt passes through the suspension mounting bracket, the first through hole and the second through hole in sequence.

[0011] In combination with the first aspect, in one embodiment, a plurality of first through holes are arranged at intervals at the edge of the gearbox middle shell, a plurality of second through holes are arranged at intervals at the edge of the gearbox rear shell, and a plurality of third through holes are provided on the suspension mounting bracket, and each of the first through holes corresponds to the position of one second through hole and one third through hole.

[0012] In combination with the first aspect, in one embodiment, the ends of the fixing bolts are respectively locked with the suspension mounting bracket and the gearbox rear housing through nuts.

[0013] In combination with the first aspect, in one embodiment, a shock absorbing structure mounting hole is provided on the suspension body.

[0014] In combination with the first aspect, in one embodiment, the shock absorbing structure mounting hole is extended along the Z direction of the vehicle.

[0015] In combination with the first aspect, in one embodiment, an end surface of the gearbox middle housing in the X direction is parallel to a mounting surface of the suspension mounting bracket.

[0016] In a second aspect, an embodiment of the present application provides a car, comprising: a vehicle transmission device as described in any one of the above.

[0017] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0018] The applicant found that when the vehicle transmission suspension device is subjected to vibration excitation, the fixing bolts are prone to loosening or breaking, and the transmission housing is subjected to abnormal stress and cracking. This is because the fixing bolts are subjected to excessive axial load. The present application changes the connection position between the suspension and the transmission housing to change the connection method of the bolts, so that when the vehicle transmission suspension device is subjected to vibration excitation, the fixing bolts only bear radial loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1This is a schematic structural diagram of a vehicle gearbox suspension device in the first embodiment of the present application;

[0021] Figure 2 This is a schematic structural diagram of a vehicle gearbox suspension device in a second embodiment of the present application;

[0022] Figure 3 This is an exploded view of the vehicle transmission suspension device in the second embodiment of the present application.

[0023] In the figure: 1. Transmission middle housing; 2. Suspension body; 3. Suspension mounting bracket; 31. Fixing bolts; 4. Transmission rear housing; 5. Nuts. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] In the related art, the stress condition of the housing at the suspension installation is poor, which causes the fixing bolts used for connection to become loose or break easily, and the gearbox housing is subjected to abnormal stress and cracks.

[0026] First, as Figure 1 As shown, the present application provides a vehicle gearbox device, which includes: a gearbox middle housing 1, at least one suspension body 2 and at least one suspension mounting bracket 3;

[0027] A suspension mounting bracket 3 is provided on the suspension body 2. A fixing bolt 31 is passed through the end of the suspension mounting bracket 3. The end of the suspension mounting bracket 3 extends rearward along the vehicle X-direction and abuts against the end face of the transmission middle housing 1 in the X-direction. The end of the suspension mounting bracket 3 is connected to the end face of the transmission middle housing 1 in the X-direction via the fixing bolt 31. When the vehicle transmission device is subjected to vibration excitation of the powertrain and / or road excitation during vehicle driving, the fixing bolt 31 is only subjected to radial load.

[0028] It should be noted that the vehicle X direction refers to the front-rear direction of the vehicle, the vehicle Y direction refers to the horizontal direction of the vehicle left and right, and the vehicle Z direction is the height direction of the vehicle body. Figure 1 F in the middle represents the excitation direction of the road-induced powertrain vibration excitation on the suspension body 2. To meet the requirements of vehicle lightweighting, the transmission housing is generally made of low-strength materials such as aluminum alloy. Through testing and analysis, the applicant found that damage to the transmission housing at the suspension installation mainly includes three types of failure:

[0029] First, the fixing bolts 31 are loose, and the gearbox middle housing 1 is subjected to abnormal stress and cracks.

[0030] After analysis, the applicant determined that the failure was caused by the axial force acting on the fixing bolt 31 when the vehicle transmission assembly was subjected to the powertrain's vibration excitation F. This caused the bolt's elongation to fluctuate, resulting in insufficient clamping force from the fixing bolt 31 on the mating surface between the suspension mounting bracket 3 and the transmission mid-shell 1. This resulted in relative slippage between the mating surfaces and loosening of the fixing bolt 31. Simultaneously, the meshing clearance between the threads of the fixing bolt 31 and the transmission mid-shell 1 dynamically changed, causing the fixing bolt 31 to loosen.

[0031] Second: The fixing bolt is broken.

[0032] After analysis, the applicant believes that the cause of the above failure is that the fixing bolt 31 is subjected to the axial force F, and the fixing bolt 31 suffers fatigue fracture under the alternating load.

[0033] Third: The gearbox middle housing 1 thread is stripped and failed.

[0034] After analysis, the applicant believes that the cause of the above failure is that the fixing bolt 31 is subjected to an axial force component, which exceeds the static strength or fatigue strength limit of the thread on the gearbox middle shell, causing the thread on the gearbox middle shell to slip.

[0035] It is understandable that, based on the above analysis, the main reason for the failure of the housing at the suspension installation is that the fixing bolts 31 used to connect the two are subjected to excessive axial force. Furthermore, in the above embodiment of the present application, the suspension mounting bracket 3 extends backward along the X direction and is attached to and connected to the end face of the transmission middle shell 1. Instead of being directly connected to the side of the transmission middle shell 1, the setting direction of the fixing bolts 31 is changed. When the suspension body 2 of the vehicle transmission device is subjected to the vibration excitation F of the powertrain, the fixing bolts 31 are only subjected to radial loads, reducing the axial load, thereby reducing the possibility of failure at the suspension installation.

[0036] In some specific embodiments, the axial direction of the fixing bolt 31 is perpendicular to the Z direction of the vehicle.

[0037] It's worth noting that the direction F of road-induced powertrain vibration excitation is generally the vehicle's Z direction, i.e., vertically upward. Therefore, the axial direction of fixing bolt 31 is perpendicular to the vehicle's Z direction. This ensures that when the vehicle's transmission assembly is subjected to powertrain vibration excitation, fixing bolt 31 is only subjected to radial loads, not axial loads, thereby reducing the risk of failure.

[0038] This application provides a second embodiment, such as Figure 2 and Figure 3 As shown, the vehicle transmission device further includes: a transmission rear housing 4, a portion of which is fitted with the end surface of the transmission middle housing 1, and the transmission rear housing 4 is connected to the transmission middle housing 1 and the suspension mounting bracket 3 via the fixing bolts 31.

[0039] It is understandable that if Figure 3 As shown, one end of the suspension mounting bracket 3 is overlapped with the gearbox middle housing 1 and the end face of the gearbox middle housing 1 in the vehicle X direction, so that the fixing bolt 31 is simultaneously passed through the gearbox rear housing 4, the gearbox middle housing 1 and the suspension mounting bracket 3 to complete the connection and fixation.

[0040] In some preferred embodiments, the transmission middle housing 1 is provided with at least one first through-hole, and the transmission rear housing 4 is provided with at least one second through-hole. Each first through-hole corresponds to a second through-hole. The fixing bolts 31 pass through the suspension mounting bracket 3, the first through-hole, and the second through-hole in sequence. Furthermore, the ends of the fixing bolts 31 are respectively fastened to the suspension mounting bracket 3 and the transmission rear housing 4 using nuts 5.

[0041] It is understandable that the above analysis of the failure causes shows that the threads of the gearbox middle housing 1 are prone to thread stripping. In the above embodiment of the present application, the gearbox middle housing 1, the gearbox rear housing 4, and the suspension mounting bracket 3 at the suspension mounting point are not provided with threads, but are instead locked and fixed by nuts at the ends, thus avoiding the occurrence of failure caused by thread stripping.

[0042] In some optional embodiments, a plurality of first through holes are spaced apart at the edge of the gearbox middle shell 1, a plurality of second through holes are spaced apart at the edge of the gearbox rear shell 4, and a plurality of third through holes are provided on the suspension mounting bracket 3, and each of the first through holes corresponds to a position of one second through hole and one third through hole.

[0043] Preferably, in order to reduce the impact of vibration excitation, a shock-absorbing structure mounting hole is provided on the suspension body 2. Furthermore, the shock-absorbing structure mounting hole is extended along the Z direction of the vehicle.

[0044] In some optional embodiments, the end surface of the gearbox middle housing 1 in the X direction is parallel to the mounting surface of the suspension mounting bracket 3 , and the two are completely in contact with each other, which facilitates the installation of the fixing bolts 31 .

[0045] In a second aspect, the present application provides an engine, which includes a vehicle transmission device, the vehicle transmission device including: a transmission middle housing 1, at least one suspension body 2 and at least one suspension mounting bracket 3;

[0046] A suspension mounting bracket 3 is provided on the suspension body 2. A fixing bolt 31 is passed through the end of the suspension mounting bracket 3. The end of the suspension mounting bracket 3 extends rearward along the vehicle X-direction and abuts against the end face of the transmission middle housing 1 in the X-direction. The end of the suspension mounting bracket 3 is connected to the end face of the transmission middle housing 1 in the X-direction via the fixing bolt 31. When the vehicle transmission device is subjected to vibration excitation of the powertrain and / or road excitation during vehicle driving, the fixing bolt 31 is only subjected to radial load.

[0047] It should be noted that the vehicle X direction refers to the front-rear direction of the vehicle, the vehicle Y direction refers to the horizontal direction of the vehicle left and right, and the vehicle Z direction is the height direction of the vehicle body. Figure 1 F in the middle represents the excitation direction of the road-induced powertrain vibration excitation on the suspension body 2. To meet the requirements of vehicle lightweighting, the transmission housing is generally made of low-strength materials such as aluminum alloy. Through testing and analysis, the applicant found that damage to the transmission housing at the suspension installation mainly includes three types of failure:

[0048] First, the fixing bolts 31 are loose, and the gearbox middle housing 1 is subjected to abnormal stress and cracks.

[0049] After analysis, the applicant determined that the failure was caused by the axial force acting on the fixing bolt 31 when the vehicle transmission assembly was subjected to the powertrain's vibration excitation F. This caused the bolt's elongation to fluctuate, resulting in insufficient clamping force from the fixing bolt 31 on the mating surface between the suspension mounting bracket 3 and the transmission mid-shell 1. This resulted in relative slippage between the mating surfaces and loosening of the fixing bolt 31. Simultaneously, the meshing clearance between the threads of the fixing bolt 31 and the transmission mid-shell 1 dynamically changed, causing the fixing bolt 31 to loosen.

[0050] Second: The fixing bolt is broken.

[0051] After analysis, the applicant believes that the cause of the above failure is that the fixing bolt 31 is subjected to the axial force F, and the fixing bolt 31 suffers fatigue fracture under the alternating load.

[0052] Third: The gearbox middle housing 1 thread is stripped and failed.

[0053] After analysis, the applicant believes that the cause of the above failure is that the fixing bolt 31 is subjected to an axial force component, which exceeds the static strength or fatigue strength limit of the thread on the gearbox middle shell, causing the thread on the gearbox middle shell to slip.

[0054] It is understandable that, based on the above analysis, the main reason for the failure of the housing at the suspension installation is that the fixing bolts 31 used to connect the two are subjected to excessive axial force. Furthermore, in the above embodiment of the present application, the suspension mounting bracket 3 extends backward along the X direction and is attached to and connected to the end face of the transmission middle shell 1. Instead of being directly connected to the side of the transmission middle shell 1, the setting direction of the fixing bolts 31 is changed. When the suspension body 2 of the vehicle transmission device is subjected to the vibration excitation F of the powertrain, the fixing bolts 31 are only subjected to radial loads, reducing the axial load, thereby reducing the possibility of failure at the suspension installation.

[0055] In some specific embodiments, the axial direction of the fixing bolt 31 is perpendicular to the Z direction of the vehicle.

[0056] It's worth noting that the direction F of road-induced powertrain vibration excitation is generally the vehicle's Z direction, i.e., vertically upward. Therefore, the axial direction of fixing bolt 31 is perpendicular to the vehicle's Z direction. This ensures that when the vehicle's transmission assembly is subjected to powertrain vibration excitation, fixing bolt 31 is only subjected to radial loads, not axial loads, thereby reducing the risk of failure.

[0057] This application provides a second embodiment, such as Figure 2 and Figure 3 As shown, the vehicle transmission device further includes: a transmission rear housing 4, a portion of which is fitted with the end surface of the transmission middle housing 1, and the transmission rear housing 4 is connected to the transmission middle housing 1 and the suspension mounting bracket 3 via the fixing bolts 31.

[0058] It is understandable that if Figure 3 As shown, one end of the suspension mounting bracket 3 is overlapped with the gearbox middle housing 1 and the end face of the gearbox middle housing 1 in the vehicle X direction, so that the fixing bolt 31 is simultaneously passed through the gearbox rear housing 4, the gearbox middle housing 1 and the suspension mounting bracket 3 to complete the connection and fixation.

[0059] In some preferred embodiments, the transmission middle housing 1 is provided with at least one first through-hole, and the transmission rear housing 4 is provided with at least one second through-hole. Each first through-hole corresponds to a second through-hole. The fixing bolts 31 pass through the suspension mounting bracket 3, the first through-hole, and the second through-hole in sequence. Furthermore, the ends of the fixing bolts 31 are respectively fastened to the suspension mounting bracket 3 and the transmission rear housing 4 using nuts 5.

[0060] It is understandable that the above analysis of the failure causes shows that the threads of the gearbox middle housing 1 are prone to thread stripping. In the above embodiment of the present application, the gearbox middle housing 1, the gearbox rear housing 4, and the suspension mounting bracket 3 at the suspension mounting point are not provided with threads, but are instead locked and fixed by nuts at the ends, thus avoiding the occurrence of failure caused by thread stripping.

[0061] In some optional embodiments, a plurality of first through holes are spaced apart at the edge of the gearbox middle shell 1, a plurality of second through holes are spaced apart at the edge of the gearbox rear shell 4, and a plurality of third through holes are provided on the suspension mounting bracket 3, and each of the first through holes corresponds to a position of one second through hole and one third through hole.

[0062] Preferably, in order to reduce the impact of vibration excitation, a shock-absorbing structure mounting hole is provided on the suspension body 2. Furthermore, the shock-absorbing structure mounting hole is extended along the Z direction of the vehicle.

[0063] In some optional embodiments, the end surface of the gearbox middle housing 1 in the X direction is parallel to the mounting surface of the suspension mounting bracket 3 , and the two are completely in contact with each other, which facilitates the installation of the fixing bolts 31 .

[0064] In a third aspect, the present application provides an automobile, comprising: a vehicle gearbox device, the device comprising: a gearbox middle housing 1, at least one suspension body 2, and at least one suspension mounting bracket 3;

[0065] A suspension mounting bracket 3 is provided on the suspension body 2. A fixing bolt 31 is passed through the end of the suspension mounting bracket 3. The end of the suspension mounting bracket 3 extends rearward along the vehicle X-direction and abuts against the end face of the transmission middle housing 1 in the X-direction. The end of the suspension mounting bracket 3 is connected to the end face of the transmission middle housing 1 in the X-direction via the fixing bolt 31. When the vehicle transmission device is subjected to vibration excitation of the powertrain, the fixing bolt 31 is only subjected to radial load.

[0066] It should be noted that the vehicle X direction refers to the front-rear direction of the vehicle, the vehicle Y direction refers to the horizontal direction of the vehicle left and right, and the vehicle Z direction is the height direction of the vehicle body. Figure 1 F in the middle represents the excitation direction of the road-induced powertrain vibration excitation on the suspension body 2. To meet the requirements of vehicle lightweighting, the transmission housing is generally made of low-strength materials such as aluminum alloy. Through testing and analysis, the applicant found that damage to the transmission housing at the suspension installation mainly includes three types of failure:

[0067] First, the fixing bolts 31 are loose, and the gearbox middle housing 1 is subjected to abnormal stress and cracks.

[0068] After analysis, the applicant determined that the failure was caused by the axial force acting on the fixing bolt 31 when the vehicle transmission assembly was subjected to the powertrain's vibration excitation F. This caused the bolt's elongation to fluctuate, resulting in insufficient clamping force from the fixing bolt 31 on the mating surface between the suspension mounting bracket 3 and the transmission mid-shell 1. This resulted in relative slippage between the mating surfaces and loosening of the fixing bolt 31. Simultaneously, the meshing clearance between the threads of the fixing bolt 31 and the transmission mid-shell 1 dynamically changed, causing the fixing bolt 31 to loosen.

[0069] Second: The fixing bolt is broken.

[0070] After analysis, the applicant believes that the cause of the above failure is that the fixing bolt 31 is subjected to the axial force F, and the fixing bolt 31 suffers fatigue fracture under the alternating load.

[0071] Third: The gearbox middle housing 1 thread is stripped and failed.

[0072] After analysis, the applicant believes that the cause of the above failure is that the fixing bolt 31 is subjected to an axial force component, which exceeds the static strength or fatigue strength limit of the thread on the gearbox middle shell, causing the thread on the gearbox middle shell to slip.

[0073] It is understandable that, based on the above analysis, the main reason for the failure of the housing at the suspension installation is that the fixing bolts 31 used to connect the two are subjected to excessive axial force. Furthermore, in the above embodiment of the present application, the suspension mounting bracket 3 extends backward along the X direction and is attached to and connected to the end face of the transmission middle shell 1. Instead of being directly connected to the side of the transmission middle shell 1, the setting direction of the fixing bolts 31 is changed. When the suspension body 2 of the vehicle transmission device is subjected to the vibration excitation F of the powertrain, the fixing bolts 31 are only subjected to radial loads, reducing the axial load, thereby reducing the possibility of failure at the suspension installation.

[0074] In some specific embodiments, the axial direction of the fixing bolt 31 is perpendicular to the Z direction of the vehicle.

[0075] It's worth noting that the direction F of road-induced powertrain vibration excitation is generally the vehicle's Z direction, i.e., vertically upward. Therefore, the axial direction of fixing bolt 31 is perpendicular to the vehicle's Z direction. This ensures that when the vehicle's transmission assembly is subjected to powertrain vibration excitation, fixing bolt 31 is only subjected to radial loads, not axial loads, thereby reducing the risk of failure.

[0076] This application provides a second embodiment, such as Figure 2 and Figure 3As shown, the vehicle transmission device further includes: a transmission rear housing 4, a portion of which is fitted with the end surface of the transmission middle housing 1, and the transmission rear housing 4 is connected to the transmission middle housing 1 and the suspension mounting bracket 3 via the fixing bolts 31.

[0077] It is understandable that if Figure 3 As shown, one end of the suspension mounting bracket 3 is overlapped with the gearbox middle housing 1 and the end face of the gearbox middle housing 1 in the vehicle X direction, so that the fixing bolt 31 is simultaneously passed through the gearbox rear housing 4, the gearbox middle housing 1 and the suspension mounting bracket 3 to complete the connection and fixation.

[0078] In some preferred embodiments, the transmission middle housing 1 is provided with at least one first through-hole, and the transmission rear housing 4 is provided with at least one second through-hole. Each first through-hole corresponds to a second through-hole. The fixing bolts 31 pass through the suspension mounting bracket 3, the first through-hole, and the second through-hole in sequence. Furthermore, the ends of the fixing bolts 31 are respectively fastened to the suspension mounting bracket 3 and the transmission rear housing 4 using nuts 5.

[0079] It is understandable that the above analysis of the failure causes shows that the threads of the gearbox middle housing 1 are prone to thread stripping. In the above embodiment of the present application, the gearbox middle housing 1, the gearbox rear housing 4, and the suspension mounting bracket 3 at the suspension mounting point are not provided with threads, but are instead locked and fixed by nuts at the ends, thus avoiding the occurrence of failure caused by thread stripping.

[0080] In some optional embodiments, a plurality of first through holes are spaced apart at the edge of the gearbox middle shell 1, a plurality of second through holes are spaced apart at the edge of the gearbox rear shell 4, and a plurality of third through holes are provided on the suspension mounting bracket 3, and each of the first through holes corresponds to a position of one second through hole and one third through hole.

[0081] Preferably, in order to reduce the impact of vibration excitation, a shock-absorbing structure mounting hole is provided on the suspension body 2. Furthermore, the shock-absorbing structure mounting hole is extended along the Z direction of the vehicle.

[0082] In some optional embodiments, the end surface of the gearbox middle housing 1 in the X direction is parallel to the mounting surface of the suspension mounting bracket 3 , and the two are completely in contact with each other, which facilitates the installation of the fixing bolts 31 .

[0083] In summary, the applicant has found that when the vehicle gearbox suspension device is subjected to vibration excitation, the fixing bolts are prone to loosening or breaking, and the gearbox middle shell is subjected to abnormal stress and cracking. This is because the fixing bolts are subjected to excessive axial load. The applicant changes the connection position of the suspension and the gearbox housing to change the connection method of the bolts, so that when the vehicle gearbox suspension device is subjected to vibration excitation, the fixing bolts only bear radial loads.

[0084] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0085] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0086] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A vehicle transmission device, characterized in that: include: Transmission middle housing (1); at least one suspended body (2); At least one suspension mounting bracket (3) is provided on the suspension body (2), a fixing bolt (31) is passed through the end of the suspension mounting bracket (3), the axial direction of the fixing bolt (31) is perpendicular to the vehicle body height direction, and the axial direction of the fixing bolt (31) is along the vehicle X direction, the vehicle X direction being the front-rear direction of the vehicle, the end of the suspension mounting bracket (3) extends rearward along the vehicle X direction and fits with the end face of the gearbox middle shell (1) in the vehicle X direction, and the end of the suspension mounting bracket (3) is connected to the end face of the gearbox middle shell (1) in the vehicle X direction through the fixing bolt (31), and when the vehicle gearbox device is subjected to vibration excitation of the powertrain vertically upward in the vehicle body height direction and / or road surface excitation when the vehicle is traveling, the fixing bolt (31) is only subjected to radial load.

2. The vehicle transmission device according to claim 1, wherein: Also includes: A transmission rear housing (4) is partially fitted with the end surface of the transmission middle housing (1), and the transmission rear housing (4) is connected to the transmission middle housing (1) and the suspension mounting frame (3) via the fixing bolts (31).

3. The vehicle transmission device according to claim 2, wherein: The gearbox middle housing (1) is provided with at least one first through hole, the gearbox rear housing (4) is provided with at least one second through hole, each first through hole corresponds to a position of the second through hole, and the fixing bolt (31) passes through the suspension mounting frame (3), the first through hole, and the second through hole in sequence.

4. The vehicle transmission device according to claim 3, wherein: A plurality of first through holes are arranged at intervals on the edge of the gearbox middle housing (1), a plurality of second through holes are arranged at intervals on the edge of the gearbox rear housing (4), and a plurality of third through holes are provided on the suspension mounting frame (3), and each of the first through holes corresponds to a position of one of the second through holes and one of the third through holes.

5. The vehicle transmission device according to claim 2, wherein: The ends of the fixing bolts (31) are respectively locked with the suspension mounting frame (3) and the gearbox rear housing (4) through nuts (5).

6. The vehicle transmission device according to claim 1, wherein: A shock-absorbing structure mounting hole is provided on the suspension body (2).

7. The vehicle transmission device according to claim 6, wherein: The shock-absorbing structure mounting hole is extended along the height direction of the vehicle body.

8. The vehicle transmission device according to claim 1, wherein: The end surface of the gearbox middle housing (1) in the X direction is parallel to the mounting surface of the suspension mounting frame (3).

9. An automobile, characterized in that: include: A vehicle transmission device according to any one of claims 1 to 8.

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