CN210821803U - Torsion-resistant connecting rod of power assembly suspension system and vehicle - Google Patents

Abstract

The present application discloses a torsion link of a powertrain suspension system. The anti-torsion connecting rod includes a first bushing, a second bushing and a connecting rod main body. The connecting rod main body is connected between the first bushing and the second bushing. The first bushing is used to connect the power assembly, and the second bushing is used for for connecting the subframe; the connecting rod body includes a deformation piece, a first shell, a second shell and an elastic piece, and the deformation piece, the first shell and the elastic piece together form a sealing cavity, and the sealing cavity is filled with liquid; When the first bushing presses or stretches the deformation member, the deformation member pushes the liquid to flow in the sealing cavity. The anti-torsion connecting rod provided by the present application can play a better buffering effect and reduce the acceleration shock of the driver. The present application also discloses a vehicle including the above torsion link.

Description

Torsion link of powertrain suspension system and vehicle

technical field

The present application relates to the technical field of powertrain suspension systems, and in particular, to a torsion link of a powertrain suspension system and a vehicle.

Background technique

The main functions of the suspension system of the automotive powertrain are as follows: supporting the powertrain and controlling the motion of the powertrain; isolating the transmission of powertrain vibrations to the body and frame; bearing the output torque and dynamic load of the powertrain. Automotive powertrain mount systems typically include load-bearing mounts, torsional links, damping elements, and associated brackets.

The torsion link is usually located below the powertrain, with a bushing at one end connected to the powertrain and a bushing at the other end connected to the subframe. Through the buffering effect of the anti-torsion link, the transmission of the vibration of the powertrain to the subframe can be reduced, and the noise, vibration and harshness (noise, vibration and harshness, NVH) performance of the vehicle can be improved.

However, in the traditional technology, the anti-torsion link achieves a buffering effect through the rubber in the two bushings. When the powertrain outputs a large torque instantaneously (especially for electric vehicles, when the driver depresses the accelerator to the bottom, the powertrain will When the peak torque is output almost instantaneously), the rubber of the anti-torsion link is instantly compressed to the limit, giving the driver a sense of acceleration shock and affecting the ride comfort.

Utility model content

The application provides a torsion link of a powertrain suspension system. The torsion link enhances the buffering effect of the torsion link by increasing the buffering effect of the liquid, reduces the driver's acceleration shock, thereby improving the User comfort. The application also provides a vehicle including the torsion link.

In a first aspect, the present application provides a torsion link of a powertrain suspension system. The torsion link of the powertrain suspension system includes a first bushing, a second bushing and a connecting rod main body, the connecting rod main body is connected between the first bushing and the second bushing, so The first bushing is used for connecting the power assembly, and the second bushing is used for connecting the subframe;

The connecting rod body includes a deformation piece, a first casing, a second casing and an elastic piece, one end of the deformation piece is fixedly connected to the first bushing, the other end is fixedly connected to the first casing, and the The first casing is located on the side of the deformation member away from the first bushing, one end of the second casing is fixed to the first casing, and the other end is fixed to the second bushing, so the elastic piece is fixed on one end of the first casing away from the deformation piece;

The deformation piece, the first shell and the elastic piece together form a sealed cavity, and the sealed cavity is filled with liquid; when the first bushing is forced to squeeze or stretch the deformation piece , the deformation member pushes the liquid to flow in the sealed cavity.

In one embodiment, the connecting rod body further includes a partition, the partition is located between the deformation member and the elastic member, and the partition divides the sealed cavity into a first cavity and a second cavity, the first cavity contacts the deformable member, the second cavity contacts the elastic member, the partition plate is provided with a plurality of through holes, and the plurality of through holes communicate with the the first cavity and the second cavity.

In one embodiment, the plurality of through holes are arranged axially symmetrically.

In one embodiment, the plurality of through holes include a first through hole and a second through hole, the number of the second through holes is multiple, and the plurality of the second through holes are arranged around the first through hole. The periphery of a through hole, and the diameter of the first through hole is larger than the diameter of the second through hole.

In one embodiment, the deformation member includes a main spring inner core and a main spring rubber connected with the main spring inner core, and the main spring inner core is connected between the first bushing and the main spring rubber Therebetween, the main spring rubber is connected to the first casing, and the first casing is surrounded by the periphery of the main spring rubber.

In one embodiment, the main spring rubber includes a first rubber body and a second rubber body, the first rubber body and the second rubber body are symmetrically arranged with respect to the inner core of the main spring, and the first rubber body and the second rubber body are symmetrically arranged relative to the inner core of the main spring, and the The size of the opening formed by the first rubber body and the second rubber body gradually increases from the inner core of the main spring toward the elastic member.

In one embodiment, the elastic member is made of rubber.

In one embodiment, a part of the first casing is accommodated in the second casing, and the outer side wall of the first casing and the inner side wall of the second casing are in an interference fit.

In one embodiment, a receiving groove is provided on the side of the first bushing facing the deforming member, and a protrusion is provided on the side of the deforming member facing the second bushing, part or all of the The protrusion is accommodated in the accommodating groove, and the protrusion is threadedly connected with the groove wall of the accommodating groove.

In a second aspect, the present application also provides a vehicle. The vehicle includes a power assembly, a subframe, and the above-mentioned torsion link, one end of the torsion link is connected to the power assembly, and the other end is connected to the subframe.

In the embodiment of the present application, the power assembly drives the first bushing to move, so that the first bushing abuts against the deformation member, so that the deformation member is deformed, and drives the liquid flow in the sealing cavity, so that the kinetic energy of the first bushing is converted For the kinetic energy and internal energy of the liquid, the buffering effect of the anti-torsion link is improved, the acceleration impact of the driver is reduced, and the user's riding comfort is improved.

Description of drawings

In order to illustrate the technical solutions of the present application more clearly, the following briefly introduces the accompanying drawings used in the implementation manner. Obviously, the accompanying drawings in the following description are only some implementations of the present application, which are common in the art. As far as technical personnel are concerned, other drawings can also be obtained from these drawings without creative labor.

1 is a schematic structural diagram of a vehicle provided by an embodiment of the present application;

Fig. 2 is the structural schematic diagram of the torsion connecting rod shown in Fig. 1;

FIG. 3 is a schematic structural diagram of the torsion link shown in FIG. 2 at another angle;

Fig. 4 is a schematic cross-sectional view of the structure of Fig. 3 along the line A-A;

Fig. 5 is the enlarged structural schematic diagram of the connecting rod main body shown in Fig. 4;

Fig. 6 is the structural representation of the separator shown in Fig. 5;

FIG. 7 is a schematic structural diagram of the separator shown in FIG. 5 at another angle.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. The embodiments of the present application and features in the embodiments may be combined with each other without conflict. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

Please refer to FIG. 1 , which is a schematic structural diagram of a vehicle provided by an embodiment of the present application. Embodiments of the present application provide a vehicle 100 . The vehicle 100 refers to a wheeled vehicle that is driven or towed by a power device, and is driven on the road for passengers or for transporting goods and performing special engineering operations. It can be understood that the vehicle 100 provided in this embodiment of the present application is a motor vehicle. In the embodiments of the present application, description is made by taking the vehicle 100 as an electric vehicle as an example. In other embodiments, the vehicle 100 can also be a gasoline vehicle.

The vehicle 100 includes a powertrain 101 , a subframe 102 and a torsion link 103 of the powertrain suspension system. The vehicle 100 also includes a housing 104 . The power assembly 101 , the subframe 102 and the anti-torsion link 103 are located in the housing 104 . The powertrain 101 refers to a series of component assemblies on the vehicle 100 that generate power and transmit the power to the road surface. Powertrain 101 broadly includes engine, gearbox, drive shaft, differential, clutch, etc., but in general, powertrain 101 generally only refers to engine, transmission, and the rest of the parts integrated into the transmission, such as clutch or front differential etc. For example, for a conventional internal combustion engine, the powertrain 101 refers to the engine and the gearbox; for an electric vehicle, the powertrain 101 refers to the motor and the differential.

The subframe 102 can be regarded as the skeleton of the front and rear axles, and is an integral part of the front and rear axles. The subframe 102 is not a complete frame, but only supports the front and rear axles and suspension brackets, so that the axles and suspensions are connected to the "front frame" through it, which is customarily called "subframe". The subframe can play the role of blocking vibration and noise.

One end of the anti-torsion link 103 is connected to the power assembly 101 , and the other end is connected to the subframe 102 . When the vehicle 100 moves forward, the powertrain 101 rotates around its rotation axis, and will pull the anti-torsion link 103 to receive force in the front-rear direction. Through the buffering effect of the anti-torsion link 103 , the transmission of the vibration of the powertrain 101 to the subframe 102 can be reduced, and the performance of the noise, vibration and harshness of the whole vehicle can be improved.

Please also refer to FIG. 2 , which is a schematic structural diagram of the anti-torsion link 103 shown in FIG. 1 . The anti-torsion link 103 includes a first bushing 11 , a second bushing 12 and a link body 13 . The first bushing 11 is used to connect the powertrain 101 . The second bushing 12 is used to connect the subframe 102 . The link body 13 is connected between the first bushing 11 and the second bushing 12 . When the powertrain 101 moves with the first bushing 11, the kinetic energy of the first bushing 11 will be transmitted to the connecting rod main body 13, and the connecting rod main body 13 has a buffering function, which can absorb the kinetic energy of the first bushing 11 to avoid the first bushing 11. The second bushing 12 moves vigorously, thereby reducing the driver's acceleration shock.

Please continue to refer to FIG. 2 and FIG. 3 . FIG. 3 is a schematic structural diagram of the anti-torsion link 103 shown in FIG. 2 at another angle. The first bushing 11 includes a first bushing inner tube 111 and a first bushing outer tube 112 . The first bushing outer tube 112 is arranged around the periphery of the first bushing inner tube 111 . The first bushing inner tube 111 is used to connect the power assembly 101 , and the first bushing outer tube 112 is used to connect the connecting rod body 13 .

The second bushing 12 includes a second bushing inner tube 121 , a second bushing outer tube 122 , and a rubber portion 123 located between the second bushing inner tube 121 and the second bushing outer tube 122 . The rubber portion 123 is located between the second bushing inner tube 121 and the second bushing outer tube 122 . The second bushing outer tube 122 is arranged around the periphery of the rubber portion 123 .

The second bushing inner tube 121 , the second bushing outer tube 122 and the rubber part 123 are formed into an integrated structure through vulcanization. The rubber portion 123 can play a buffering role. The second bushing inner tube 121 is used to connect the subframe 102 , and the second bushing outer tube 122 is used to connect the link main body 13 .

Wherein, when the first bushing 11 generates large kinetic energy, the connecting rod body 13 may not be able to fully absorb the kinetic energy generated by the first bushing 11, and part of the kinetic energy may be transmitted to the second bushing outer tube 122, so that the second bushing The outer tube 122 squeezes or stretches the rubber part 123, and the rubber part 123 acts as a buffer, further reducing the movement of the subframe 102 driven by the second bushing inner tube 121, thereby further reducing the driver's acceleration impact.

Further, please refer to FIG. 3 and FIG. 4 together. FIG. 4 is a schematic cross-sectional view of the structure of FIG. 3 along the line A-A. The connecting rod body 13 includes a deformation member 131 , a first casing 132 , a second casing 133 and an elastic member 134 . One end of the deformation member 131 is connected to the first bushing 11 , and the other end is connected to the first housing 132 . The first housing 132 is located on the side of the deformation member 131 away from the first bushing 11 . In one embodiment, as shown in FIG. 4 , one end of the deformation member 131 is fixedly connected to the first bushing 11 , and the other end is fixedly connected to the first housing 132 . One end of the deformation element 131 is accommodated in the first bushing 11 , and the other end is accommodated in the first housing 132 . One end of the second casing 133 is fixedly connected to the first casing 132 , and the other end is fixedly connected to the second bushing 12 . As shown in FIG. 4 , the second casing 133 surrounds the periphery of the first casing 132 , and the second casing 133 is connected between the first casing 132 and the second bushing 12 .

It can be understood that the deformation member 131 is used for connecting the first bushing outer tube 112 to connect the connecting rod main body 13 with the first bushing 11 . The second housing 133 is used for connecting the second bushing outer tube 122 to connect the connecting rod body 13 and the second bushing 12 . The first casing 132 surrounds and connects to the outer side wall of the partial deformation member 131 . A side of the second casing 133 away from the second bushing 12 surrounds the first casing 132 and is connected to the first casing 132 . Wherein, in one embodiment, the outer wall of the first casing 132 is in interference fit with the inner wall of the second casing 133 , so that the second casing 133 is fixed relative to the first casing 132 .

The elastic member 134 is fixed to one end of the first housing 132 away from the deformation member 131 . The elastic member 134 is made of elastic material. Wherein, the deformation member 131 , the first casing 132 and the elastic member 134 together enclose a sealed cavity 135 . The sealed cavity 135 is filled with liquid. As shown in Figure 4, the dots within the sealed cavity 135 represent liquid.

It can be understood that the deformation member 131 and the elastic member 134 respectively block the openings at both ends of the first casing 132 to seal the first casing 132 to avoid liquid leakage. The elastic member 134 is accommodated in the second housing 133 , so that the space between the sealing cavity 135 and the second housing 133 is reused, and the volume of the anti-torsion link 103 is reduced.

As shown in FIG. 4 , the deformation member 131 and the elastic member 134 are located at two ends of the first casing 132 respectively. It can be understood that the deformation member 131 and the elastic member 134 respectively block the openings at both ends of the first casing 132 , so that the deformation member 131 , the first casing 132 and the elastic member 134 together form a closed sealing cavity 135 .

When the first bushing 11 is stressed or stretched by the deformation member 131 , the deformation member 131 pushes the liquid to flow in the sealing cavity 135 . When the power assembly 101 drives the first bushing 11 to move, the first bushing outer tube 112 abuts against the deformation member 131, so that the deformation member 131 is deformed, and the liquid in the sealing cavity 135 is pushed to flow, so that the The kinetic energy is partially converted into kinetic energy and internal energy of the liquid, so that the connecting rod body 13 has a buffering effect.

In the embodiment of the present application, the power assembly 101 drives the first bushing 11 to move, so that the first bushing 11 abuts against the deformation member 131 , so that the deformation member 131 is deformed, and the liquid in the sealing cavity 135 is pushed to flow, so that the kinetic energy Converted into the kinetic energy and internal energy of the liquid, so as to play a buffering role and reduce the driver's acceleration shock. For example, when the vehicle 100 is rapidly accelerated, the powertrain 101 outputs a large torque instantaneously, and at this time, the powertrain generates a large impulse on the first bushing 11, so that the first bushing 11 presses the deformation member 131, so that the deformation member 131 pushes the liquid to flow, and the flowing liquid will abut against the elastic member 134, so that the liquid flows back and forth in the sealed cavity 135, so as to play a buffering role and reduce the driver's acceleration impact.

In one embodiment, the elastic member 134 is made of rubber.

In the embodiment of the present application, the elastic member 134 is a thin rubber skin that can be deformed. Wherein, the thickness of the elastic member 134 can be in the range of 1 mm to 10 mm. For example, the thickness of the elastic member 134 is about 2 mm.

Further, please continue to refer to FIG. 4 , a part of the first casing 132 is accommodated in the second casing 133 , and the outer side wall of the first casing 132 and the inner side wall of the second casing 133 are in an interference fit. It can be understood that the second casing 133 is arranged around the periphery of the first casing 132 . The first casing 132 is fixedly connected to the second casing 133 . The kinetic energy of the first housing 132 can be transmitted to the second housing 133 and finally to the second bushing 12 .

In an embodiment, as shown in FIG. 4 , a receiving groove 113 is provided on the side of the first bushing 11 facing the deformation member 131 . A protrusion 1311 is provided on the side of the deformation member 131 facing the second bushing 12 . Some or all of the protrusions 1311 are received in the receiving groove 113 , and the protrusions 1311 are screwed with the groove wall of the receiving groove 113 .

In this embodiment, the connection between the first bushing 11 and the connecting rod main body 13 is made through the screw connection between the first bushing 11 and the deformation member 131 . It can be understood that the first bushing 11 and the connecting rod body 13 are fixedly connected.

It can be understood that the second bushing 12 and the second housing 133 can also be connected with screws, so that the connection between the second bushing 12 and the connecting rod body 13 is possible. That is, the second bushing 12 is fixedly connected with the connecting rod body 13 .

In an embodiment, please refer to FIG. 4 and FIG. 5 together. FIG. 5 is an enlarged schematic structural diagram of the connecting rod body 13 shown in FIG. 4 . The deformation member 131 includes a main spring inner core 1312 and a main spring rubber 1313 connected with the main spring inner core 1312 . The main spring inner core 1312 and the main spring rubber 1313 are integrated by vulcanization. The main spring inner core 1312 is connected between the first bushing 11 and the main spring rubber 1313 . It can be understood that the protrusion 1311 of the deformation member 131 is a part of the inner core 1312 of the main spring. The main spring rubber 1313 is connected to the first casing 132 , and the first casing 132 surrounds the periphery of the main spring rubber 1313 .

Further, the main spring rubber 1313 includes a first rubber body 1314 and a second rubber body 1315 . The first rubber body 1314 and the second rubber body 1315 are symmetrically arranged relative to the main spring inner core 1312 . The size of the opening formed by the first rubber body 1314 and the second rubber body 1315 gradually increases in the direction of the main spring inner core 1312 toward the elastic member 134 .

As shown in FIG. 5 , in the schematic cross-sectional view of the connecting rod body 13 , the first rubber body 1314 and the second rubber body 1315 are arranged in an “eight” shape. It can be understood that the main spring rubber 1313 is a hollow circular cone. That is, the main spring rubber 1313 is inclined with respect to the main spring inner core 1312 .

In the embodiment of the present application, the main spring rubber 1313 is inclined relative to the main spring inner core 1312 , so that the main spring rubber 1313 can bear the force in the pulling and pressing directions to the greatest extent, so as to improve the service life of the main spring rubber 1313 .

In one embodiment, please refer to FIG. 5 and FIG. 6 together. FIG. 6 is a schematic structural diagram of the separator shown in FIG. 5 . The link body 13 also includes a spacer 136 . The partition plate 136 is located between the deformation member 131 and the elastic member 134 , and the partition plate 136 divides the sealing cavity 135 into a first cavity 1351 and a second cavity 1352 . As shown in FIG. 5 , the partition plate 136 is fixed in the first casing 132 . In one embodiment, the partition plate 136 is in interference fit with the inner wall of the first shell 132 , so that the partition plate 136 is fixedly connected to the first shell 132 .

The separator 136 is provided with a plurality of through holes 1361 . The plurality of through holes 1361 communicate with the first cavity 1351 and the second cavity 1352 . As shown in FIG. 5 , the first cavity 1351 contacts the deformation member 131 . The second cavity 1352 contacts the elastic member 134 .

In the embodiment of the present application, the sealing cavity 135 is provided with a partition 136, and the liquid flows between the first cavity 1351 and the second cavity 1352 through the plurality of through holes 1361 on the partition 136, so that the liquid can have orderly flow, which improves the buffering effect of the connecting rod body 13 and further reduces the driver's acceleration shock.

In the embodiments of the present application, description is made by taking the example that the connecting rod body 13 is provided with the partition plate 136 . In other embodiments, the link body 13 may not be provided with the partition plate 136 .

Wherein, when the liquid flows through the plurality of through holes 1361 , there will be a damping effect, and the damping effect is affected by the shape and size of the through holes 1361 . When the power generated by the power assembly 101 to the first bushing 11 is small, the liquid flows slowly in the sealing cavity 135, and the liquid can flow through all the through holes 1361 on the partition plate 136 more smoothly, that is, the damping is correspondingly small. . When the power generated by the power assembly 101 to the first bushing 11 is large, the liquid flows quickly in the sealing cavity 135 , and it is difficult for the liquid to pass through the through holes 1361 with a small area, and can only pass through the through holes 1361 with a large area. Flow through, that is, the damping is correspondingly larger.

The plurality of through holes 1361 can be arranged symmetrically or asymmetrically. That is, in the present application, the size and specific arrangement of the plurality of through holes 1361 are not limited.

In one embodiment, please refer to FIG. 7 , which is a schematic structural diagram of the partition plate 136 shown in FIG. 5 at another angle. The plurality of through holes 1361 are arranged axisymmetrically. That is, the arrangement of the plurality of through holes 1361 is uniform.

In the embodiment of the present application, the plurality of through holes 1361 are evenly arranged, so that when the liquid flows through the plurality of through holes 1361 , the force of the separator 136 is uniform, and the service life of the separator 136 is improved.

Further, the plurality of through holes 1361 include a first through hole 1362 and a second through hole 1363 . The number of the second through holes 1363 is plural. A plurality of second through holes 1363 are formed around the periphery of the first through holes 1362 , and the diameter of the first through holes 1362 is larger than the diameter of the second through holes 1363 .

It can be understood that the first through hole 1362 is located in the center of the partition plate 136 . When the power generated by the power assembly 101 to the first bushing 11 is relatively large, the liquid flows fast in the sealing cavity 135 , and the liquid can pass through the first through hole 1362 , between the first cavity 1351 and the second cavity 1352 . flow between.

The embodiments of the present application have been introduced in detail above, and specific examples are used to illustrate the principles and implementations of the present application. The descriptions of the above embodiments are only used to help understand the methods and core ideas of the present application; at the same time, for Persons of ordinary skill in the art, based on the idea of the present application, may have changes in the specific implementation manner and application scope. In conclusion, the contents of this description should not be construed as a limitation on the present application.

Claims (10)

1. The torsion-resistant connecting rod of the power assembly suspension system is characterized by comprising a first bushing, a second bushing and a connecting rod main body, wherein the connecting rod main body is connected between the first bushing and the second bushing, the first bushing is used for connecting a power assembly, and the second bushing is used for connecting a sub-frame;

the connecting rod main body comprises a deformation piece, a first shell, a second shell and an elastic piece, one end of the deformation piece is fixedly connected with the first lining, the other end of the deformation piece is fixedly connected with the first shell, the first shell is positioned on one side, far away from the first lining, of the deformation piece, one end of the second shell is fixedly connected with the first shell, the other end of the second shell is fixedly connected with the second lining, and the elastic piece is fixed at one end, far away from the deformation piece, of the first shell;

the deformation piece, the first shell and the elastic piece are arranged in a surrounding mode to form a sealed cavity, and liquid is filled in the sealed cavity; when the first bushing is stressed to extrude or stretch the deformation piece, the deformation piece pushes the liquid to flow in the sealing cavity.

2. The torsion resistant connecting rod of claim 1 wherein the connecting rod body further comprises a spacer plate positioned between the deformation member and the elastic member and separating the seal chamber into a first chamber and a second chamber, the first chamber contacting the deformation member and the second chamber contacting the elastic member, the spacer plate having a plurality of through holes communicating the first chamber and the second chamber.

3. The torsion link according to claim 2, wherein the plurality of through holes are arranged axisymmetrically.

4. The torsion bar linkage according to claim 2, wherein the plurality of through holes comprises a first through hole and a second through hole, the second through hole is plural in number, the second through hole is provided around a periphery of the first through hole, and a diameter of the first through hole is larger than a diameter of the second through hole.

5. The torsion resistant connecting rod according to claim 1, wherein the deformation member includes a main spring core and a main spring rubber connected to the main spring core, the main spring core is connected between the first bushing and the main spring rubber, the main spring rubber is connected to the first housing, and the first housing is enclosed around a periphery of the main spring rubber.

6. The torsion resistant linkage in accordance with claim 5 wherein the main spring rubber includes a first rubber body and a second rubber body, the first and second rubber bodies are symmetrically disposed with respect to the main spring core, and the size of the opening formed by the first and second rubber bodies is gradually increased from the main spring core toward the elastic member.

7. The torsion link of claim 1, wherein the resilient member is rubber.

8. The torsion link of any one of claims 1-7, wherein a portion of the first housing is received in the second housing and an outer sidewall of the first housing has an interference fit with an inner sidewall of the second housing.

9. The torsion bar according to claim 8, wherein the first bushing has a receiving groove formed at a side thereof facing the deformation member, the deformation member has a protrusion formed at a side thereof facing the second bushing, a portion or all of the protrusion is received in the receiving groove, and the protrusion is threadedly coupled to a wall of the receiving groove.

10. A vehicle comprising a powertrain, a subframe and a torsion link according to any one of claims 1 to 9, said torsion link having one end connected to said powertrain and another end connected to said subframe.

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