Torsional vibration damper and automobile

Abstract

The present application belongs to the field of engines, and specifically relates to a torsional vibration damper and a car, wherein the torsional vibration damper comprises a rotating seat, an inertia ring, a friction ring, a friction adjustment block and an adjustment spring, wherein the rotating seat comprises a cover plate, the cover plate comprises an end cover portion and a sleeve portion arranged around the end cover portion, the end cover portion or the sleeve portion is provided with a slide groove, the inertia ring is rotatably arranged at one end of the sleeve portion away from the end cover portion, the friction ring is arranged in the sleeve portion, the friction adjustment block is arranged in the slide groove and at least partially located between the friction ring and the inertia ring, the adjustment spring is arranged between the inner wall of the sleeve portion and the friction adjustment block, at low speed, the friction ring and the inertia ring are separated, and the damping and inertia provided by the torsional vibration damper are small, at high speed, the friction adjustment block is combined with the friction ring and the inertia ring, the friction adjustment block drives the inertia ring to rotate with the rotating seat, and the damping and inertia provided by the torsional vibration damper are large. In the present application, the vibration reduction performance of the torsional vibration damper is positively correlated with the speed, and the ability to adjust the vibration reduction performance according to the speed is stronger.

Description

Technical Field

[0001] The present application belongs to the field of engines, and specifically relates to a torsional vibration damper and a car. Background Art

[0002] When the engine is working, when the speed reaches certain specific values, it will be accompanied by severe mechanical knocking and shaking. If it keeps running at this speed, the crankshaft is likely to break. This is the torsional vibration of the crankshaft. The reason for the torsional vibration is that the crankshaft system has a certain natural frequency. When the frequency of the input torque is "in sync" with this frequency, the system will resonate. In order to suppress the torsional vibration of the crankshaft, the engine will take measures to reduce the torsional vibration. The most common method is to equip the front end of the crankshaft with a torsional vibration damper (TVD, Torsional Vibration Damper). From the perspective of reducing the torsional vibration of the system, it is hoped that the damping of the torsional vibration damper is large at high speeds and small at low speeds, that is, the vibration reduction performance of the torsional vibration damper can be adjusted with the speed.

[0003] At present, torsional vibration dampers mainly include rubber vibration dampers, circumferential spring vibration dampers and silicone oil vibration dampers. The rubber vibration damper is composed of a wheel hub, an inertial mass and an elastic vulcanized rubber connecting the two. Its vibration damping performance is determined by the inertial mass and the rubber stiffness and cannot be adjusted according to the speed. The circumferential spring vibration damper mainly includes an inner ring, an outer ring and a circumferential spring. Its vibration damping performance is also determined by the outer ring and the circumferential spring stiffness and cannot be adjusted according to the speed. The silicone oil vibration damper consists of a sealed outer shell and a floating vibration damping body therein, and the gap between the two is filled with silicone oil. The vibration damping performance of the silicone oil vibration damper is determined by the inertial mass and the viscosity of the silicone oil. Its vibration damping characteristics can change with the speed, but will be bounded by the resonant speed. Before resonance, the damping increases with the increase of the speed. After reaching the resonant speed, the damping decreases with the increase of the speed, and finally reaches a thermal equilibrium state. Obviously, the vibration damping performance is limited by the ability to adjust the speed. Summary of the invention

[0004] The purpose of the present application is to provide a torsional vibration damper and a car, so that the vibration damping performance can be adjusted with the rotational speed, the damping of the torsional vibration damper is large at high rotational speed, and the damping of the torsional vibration damper is small at low rotational speed.

[0005] In order to achieve the above object, the present application provides a torsional vibration damper, comprising:

[0006] The rotating seat comprises a cover plate, wherein the cover plate comprises an end cover portion and a sleeve portion arranged around the end cover portion, and the end cover portion or the sleeve portion is provided with a slide groove;

[0007] An inertia ring is rotatably disposed at one end of the sleeve portion away from the end cover portion;

[0008] a friction ring, disposed in the sleeve portion;

[0009] a friction adjustment block, disposed in the slide groove and at least partially located between the friction ring and the inertia ring;

[0010] an adjustment spring, arranged between the inner wall of the sleeve portion and the friction adjustment block;

[0011] Wherein, the friction adjustment block can slide along the radial direction of the sleeve portion so that the torsional vibration damper has a first state and a second state. In the first state, the friction adjustment block is located at one end of the slide groove close to the axis of the sleeve portion and is separated from the friction ring and the inertia ring. In the second state, the friction adjustment block is located at one end of the slide groove away from the axis of the sleeve portion and is combined with the friction ring and the inertia ring. The friction adjustment block drives the inertia ring to rotate with the rotating seat.

[0012] Optionally, the side of the friction ring close to the inertia ring is a slope, and the friction adjustment block includes a wedge-shaped portion. In a first state, the wedge-shaped portion is located on the side of the slope close to the axis of the sleeve portion and is separated from the slope. In a second state, the wedge-shaped portion is combined with the slope and the inertia ring.

[0013] Optionally, the rotating seat further includes a butterfly spring, and the friction ring is arranged on the end cover portion through the butterfly spring.

[0014] Optionally, the rotating seat also includes a hub and a rivet, the hub is located on the side of the end cover portion close to the inertia ring, the butterfly spring is at least partially located between the hub and the end cover portion, and the rivet connects the end cover portion, the butterfly spring and the hub.

[0015] Optionally, there are multiple slide grooves and they are arranged on the inner wall of the sleeve portion, and there are multiple friction adjustment blocks and they are arranged in the slide grooves in a one-to-one correspondence.

[0016] Optionally, a plurality of adjustment springs are arranged between each friction adjustment block and the sleeve portion, and the rotating seat also includes a spring mounting seat, the spring mounting seat is arranged at the bottom of the slide groove, the opposing surfaces of the spring mounting seat and the friction adjustment block are planes, the spring mounting seat has a positioning hole, one end of the adjustment spring is located in the positioning hole, and the other end of the adjustment spring abuts against the friction adjustment block.

[0017] Optionally, the rotating seat also includes a hub, which is arranged on a side of the end cover portion close to the inertia ring, and the inertia ring includes a first ring body, a second ring body, and a connecting portion connecting the first ring body and the second ring body, the first ring body is sleeved on the sleeve portion, the second ring body is sleeved on the hub, and the connecting portion cooperates with the friction adjustment block.

[0018] Optionally, the inertia ring further includes a support ring, which is arranged on a side of the connecting portion close to the friction adjustment block, and the friction adjustment block is located between the support ring and the sleeve portion.

[0019] Optionally, the torsional vibration damper further includes a plurality of bearings, wherein the bearings are arranged between the first ring body and the sleeve portion, between the wheel hub and the second ring body, and between the support ring and the friction adjustment block.

[0020] The present application also provides a car, comprising:

[0021] Torsional vibration damper;

[0022] A crankshaft is connected to the cover plate of the torsional vibration damper.

[0023] The torsional vibration damper and automobile disclosed in the present application have the following beneficial effects:

[0024] In the present application, the torsional vibration damper includes a rotating seat, an inertia ring, a friction ring, a friction adjustment block and an adjustment spring. The rotating seat includes at least a cover plate, the cover plate includes an end cover portion and a sleeve portion arranged around the end cover portion, one of the end cover portion or the sleeve portion is provided with a slide groove, the inertia ring is rotatably arranged at one end of the sleeve portion away from the end cover portion, the friction ring is arranged in the sleeve portion, the friction adjustment block is arranged in the slide groove and at least partially located between the friction ring and the inertia ring, and the adjustment spring is arranged between the inner wall of the sleeve portion and the friction adjustment block. At low speed, the crankshaft drives the cover plate and the friction adjustment block to rotate, the damping and inertia provided by the torsional vibration damper are small, and the vibration reduction performance of the torsional vibration damper is weak. At high speed, the crankshaft drives the cover plate, the friction adjustment block and the inertia ring to rotate, the damping and inertia provided by the torsional vibration damper are large, and the vibration reduction performance of the torsional vibration damper is strong. Compared with the silicone oil damper, the vibration reduction performance of the torsional vibration damper in the present application is positively correlated with the speed, and the ability to adjust the vibration reduction performance according to the speed is stronger.

[0025] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.

[0026] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1It is a three-dimensional schematic diagram of the torsional vibration damper in the embodiment of the present application.

[0029] Figure 2 It is a schematic diagram of the exploded view of the torsional vibration damper in the embodiment of the present application.

[0030] Figure 3 Schematic side view of the torsional vibration damper in the embodiment of the present application.

[0031] Figure 4 yes Figure 3 AA section view showing the position of the torsional vibration damper.

[0032] Figure 5 yes Figure 4 Enlarged view of position B of the torsional vibration damper.

[0033] Figure 6 yes Figure 3 Enlarged view of position C of the torsional vibration damper.

[0034] Description of reference numerals:

[0035] 100, rotating seat; 110, cover plate; 111, end cover portion; 1111, first mounting hole; 112, sleeve portion; 1121, slide groove;

[0036] 120, butterfly spring; 130, wheel hub; 131, second mounting hole; 140, rivet; 150, spring mounting seat; 151, positioning hole;

[0037] 200, inertia ring; 210, first ring body; 220, second ring body; 230, connecting part; 240, supporting ring;

[0038] 300, friction ring;

[0039] 400, friction adjustment block; 410, wedge-shaped portion; 420, support portion;

[0040] 500, adjust the spring;

[0041] 600. Bearings. DETAILED DESCRIPTION

[0042] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0043] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0044] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limiting the present application.

[0045] See also Figures 1 to 5 As shown, the torsional vibration damper in the present application includes a rotating seat 100, an inertia ring 200, a friction ring 300, a friction adjustment block 400 and an adjustment spring 500. The rotating seat 100 includes at least a cover plate 110, and the cover plate 110 includes an end cover portion 111 and a sleeve portion 112 arranged around the end cover portion 111, and one of the end cover portion 111 or the sleeve portion 112 is provided with a slide groove 1121. In addition, a first mounting hole 1111 is provided at the center of the end cover portion 111, and the first mounting hole 1111 is used for assembly and connection with the crankshaft.

[0046] The inertia ring 200 is rotatably disposed at one end of the sleeve portion 112 away from the end cover portion 111. The friction ring 300 is disposed in the sleeve portion 112 and is assembled and connected with the end cover portion 111 or the sleeve portion 112. The friction adjustment block 400 is disposed in the slide groove 1121 and is at least partially located between the friction ring 300 and the inertia ring 200. The friction ring 300 is a completed ring body structure, and the friction adjustment block 400 is a partial ring body structure, for example, it can be a 1 / 8 to 1 / 4 ring body structure. The adjustment spring 500 is disposed between the inner wall of the sleeve portion 112 and the friction adjustment block 400. Among them, the friction adjustment block 400 can slide along the radial direction of the sleeve portion 112 so that the torsional vibration damper has a first state and a second state.

[0047] In the first state, the cover plate 110 is stationary or the crankshaft drives the cover plate 110 to rotate at a low speed. When the cover plate 110 is stationary, the preload of the adjustment spring 500 is greater than the centrifugal force on the friction adjustment block 400. Under the preload of the adjustment spring 500, the friction adjustment block 400 is located at one end of the slide groove 1121 close to the axis of the sleeve portion 112, and the friction adjustment block 400 can be supported by the slide groove 1121, the friction ring 300 or the inertia ring 200. At this time, the friction adjustment block 400 and the friction ring 300 are separated, and there is a certain gap between the two. At the same time, the friction adjustment block 400 and the inertia ring 200 are separated, and the inertia ring 200 will not rotate with the friction adjustment block 400. When the crankshaft drives the cover plate 110 to rotate at a low speed, the friction adjustment block 400 can slide a certain distance along the radial direction of the sleeve portion 112, but it still does not contact the friction ring 300.

[0048] In the second state, the crankshaft drives the cover plate 110 to rotate at a high speed, the friction adjustment block 400 is located at the end of the slide groove 1121 away from the axis of the sleeve portion 112, the friction adjustment block 400 is in contact with the friction ring 300, and the friction ring 300 will squeeze the friction adjustment block 400 toward the inertia ring 200, so that the friction adjustment block 400 and the inertia ring 200 are combined by friction and other means, and the friction adjustment block 400 can drive the inertia ring 200 to rotate with the rotating seat 100.

[0049] In the present application, the vibration reduction performance of the torsional vibration damper can change with the crankshaft speed. At low speed, the crankshaft drives the cover plate 110 and the friction adjustment block 400 to rotate, the damping and inertia provided by the torsional vibration damper are small, and the vibration reduction performance of the torsional vibration damper is weak. At high speed, the crankshaft drives the cover plate 110, the friction adjustment block 400 and the inertia ring 200 to rotate, the damping and inertia provided by the torsional vibration damper are large, and the vibration reduction performance of the torsional vibration damper is strong. Compared with the silicone oil vibration damper, the vibration reduction performance of the torsional vibration damper in the present application is positively correlated with the speed, and the ability to adjust the vibration reduction performance according to the speed is stronger. In addition, compared with the silicone oil vibration damper, the torsional vibration damper in the present application has a simple structure, low manufacturing cost, small space occupation, and a wider range of applications.

[0050] The vibration reduction performance of the shock absorber is essentially the energy dissipation capacity. Improving the vibration reduction capacity will generally increase the energy consumption of the system and reduce the efficiency of the whole machine. The vibration reduction performance of the rubber shock absorber is essentially provided by the rubber, so in principle, the greater the friction consumption, the better. Circumferential spring shock absorbers and silicone oil shock absorbers are similar to rubber shock absorbers. The stronger the vibration reduction performance, the greater the friction consumption. In the torsional vibration damper in this application, a small damping value is matched when the system torsional vibration is small, which optimizes the friction work.

[0051] The high temperature resistance of the shock absorber is determined by its type and material. From a design perspective, it is obviously hoped that the higher the high temperature resistance, the better. The heat resistance of the vulcanized rubber of the rubber shock absorber is poor, and the stiffness of the rubber will change significantly at high temperatures. Therefore, the working temperature is strictly constrained during design. For common EPDM rubber, the working temperature cannot exceed 130°C. Since the viscosity of silicone oil in silicone oil shock absorbers changes significantly with temperature, it has a great influence on the vibration reduction performance. Therefore, in general practical designs, the working temperature generally does not exceed 120°C. The torsional vibration damper in this application uses non-temperature sensitive materials, which are different from rubber, silicone oil, etc., and can achieve matching of high temperature working conditions.

[0052] See also Figure 4 and Figure 5 As shown, the side of the friction ring 300 close to the inertia ring 200 is an inclined surface, and the friction adjustment block 400 includes a wedge-shaped portion 410, which can slide radially along the sleeve portion 112. The wedge-shaped portion 410 ( Figure 5 The wedge-shaped portion 410 is located on the side of the inclined surface close to the axis of the sleeve portion 112 and is separated from the inclined surface. Figure 5 The cover plate 110 slides upward to the second state, the wedge-shaped portion 410 squeezes the inclined surface of the friction ring 300 and the inertia ring 200, the friction ring 300, the friction adjustment block 400 and the inertia ring 200 are combined, and the cover plate 110 can drive the inertia ring 200 to rotate.

[0053] The side of the friction ring 300 close to the inertia ring 200 is an inclined surface, and the friction adjustment block 400 includes a wedge-shaped portion 410. The wedge-shaped portion 410 cooperates with the inclined surface of the friction ring 300. When the friction ring 300, the friction adjustment block 400 and the inertia ring 200 are combined, both sides of the friction adjustment block 400 are in surface contact with the friction ring 300 and the inertia ring 200, and the friction ring 300, the friction adjustment block 400 and the inertia ring 200 are combined more reliably.

[0054] It should be noted that the friction adjustment block 400 may include a support portion 420 in addition to the wedge-shaped portion 410. The support portion 420 is located at one end of the wedge-shaped portion 410 close to the adjustment spring 500. The support portion 420 can increase the support surface of the friction adjustment block 400 supporting the adjustment spring 500, and avoid directly supporting the adjustment spring 500 through the upper end surface of the wedge-shaped portion 410, which causes unstable support. In addition, if there is a nonlinear requirement for the torsional vibration demand at high speed (such as increasing and then decreasing, etc.), adjusting the matching shape of the friction adjustment block 400 can achieve more complex torsional vibration / inertia-speed control.

[0055] See also Figure 4 and Figure 5As shown, the rotating seat 100 further includes a butterfly spring 120, and the friction ring 300 is arranged on the end cover 111 through the butterfly spring 120. That is, the friction ring 300 is installed on the outer ring of the butterfly spring 120, and the inner ring of the butterfly spring 120 is connected to the end cover 111.

[0056] When the friction adjustment block 400 slides upward to the second state, the wedge-shaped portion 410 squeezes the friction ring 300 and compresses the butterfly spring 120. The butterfly spring 120 supports the friction ring 300 and can adjust the posture of the friction ring 300, so that the friction ring 300 and the friction adjustment block 400 can be combined more reliably and avoid a rigid connection between the friction ring 300 and the friction adjustment block 400.

[0057] When the crankshaft drives the cover plate 110 to rotate at a low speed, the friction adjustment block 400 is subjected to the centrifugal force and the pressure of the adjustment spring 500. At this time: F2 = mω2r = K×f2;

[0058] Wherein F2 is the clamping force of the adjustment spring 500, m is the mass of the friction adjustment block 400, ω is the angular velocity of the torsional vibration damper, r is the radius of the friction adjustment block 400, K is the stiffness of the adjustment spring 500, and f2 is the compression amount of the adjustment spring 500.

[0059] In the second state, when the crankshaft drives the cover plate 110 to rotate at high speed, the friction adjustment block 400 is subjected to the centrifugal force, the pressure of the adjustment spring 500 and the friction force of the friction ring 300. At this time:

[0060] F2=mω2r=K×f2;

[0061] ζ=μ×F1×R;

[0062] F1=A×f1×[(B-f1)(C-f1)+1];

[0063] Among them, ζ is the damping torque, μ is the friction coefficient, F1 is the force on the disc spring 120, R is the effective radius of the friction ring 300, f1 is the compression amount of the disc spring 120, and A, B, and C are coefficients.

[0064] It can be seen that the damping torque is proportional to the compression of the disc spring 120, the compression of the disc spring 120 is proportional to the compression of the adjustment spring 500, and the compression of the adjustment spring 500 is proportional to the crankshaft speed. Therefore, the damping of the torsional vibration damper is proportional to the crankshaft speed, that is, the higher the speed, the greater the damping value of the torsional vibration damper, the greater the dissipated work, and the better the vibration reduction performance.

[0065] See also Figure 4 and Figure 5As shown, the rotating seat 100 further includes a hub 130 and a rivet 140. The hub 130 is located on the side of the end cover 111 close to the inertia ring 200. The butterfly spring 120 is at least partially located between the hub 130 and the end cover 111. The rivet 140 connects the end cover 111, the butterfly spring 120 and the hub 130. The inertia ring 200 is rotatably arranged on the hub 130. A second mounting hole 131 is arranged at the center of the hub 130. The second mounting hole 131 is coaxial with the first mounting hole 1111 and has the same diameter. The torsional vibration damper is mounted on the crankshaft through the first mounting hole 1111 and the second mounting hole 131.

[0066] The rotating seat 100 also includes a hub 130 and a rivet 140. The butterfly spring 120 is at least partially located between the hub 130 and the end cover 111. The rivet 140 connects the end cover 111, the butterfly spring 120 and the hub 130. The connection method is simple and reliable. At the same time, the hub 130 can also serve as the rotating axis of the inertia ring 200 to support the rotational movement of the inertia ring 200.

[0067] See also Figure 3 and Figure 6 As shown, there are multiple slide grooves 1121 disposed on the inner wall of the sleeve portion 112 , and there are multiple friction adjustment blocks 400 disposed in the slide grooves 1121 in a one-to-one correspondence.

[0068] The friction adjustment block 400 is arranged in the slide groove 1121, and the slide groove 1121 can limit the friction adjustment block 400 from sliding radially along the sleeve portion 112. At the same time, the sleeve portion 112 can drive the friction adjustment block 400 to rotate to avoid misalignment between the friction adjustment block 400 and the adjustment spring 500. A plurality of friction adjustment blocks 400 are arranged, and the friction adjustment blocks 400 and the friction ring 300 are combined at multiple points, so that the force on the friction ring 300 is more uniform.

[0069] It should be noted that the slide groove 1121 can be disposed on the inner wall of the sleeve portion 112 , but is not limited thereto. The slide groove 1121 can also be disposed on a side of the end cover portion 111 close to the inertia ring 200 , depending on specific circumstances.

[0070] See also Figure 3 and Figure 6 As shown, a plurality of adjustment springs 500 are arranged between each friction adjustment block 400 and the sleeve portion 112. The rotating seat 100 further includes a spring mounting seat 150, which is arranged at the bottom of the slide groove 1121. The opposing surfaces of the spring mounting seat 150 and the friction adjustment block 400 are planes. The spring mounting seat 150 has a positioning hole 151, which is arranged on the plane opposite to the spring mounting seat 150 and the friction adjustment block 400. One end of the adjustment spring 500 is located in the positioning hole 151, and the other end of the adjustment spring 500 abuts against the friction adjustment block 400.

[0071] It should be noted that the adjustment spring 500 can be installed between the sleeve portion 112 and the friction adjustment block 400 through the spring mounting seat 150, but is not limited to this. The positioning hole 151 can also be directly opened on the inner wall of the sleeve portion 112, and the adjustment spring 500 is directly installed between the sleeve portion 112 and the friction adjustment block 400, which can be determined according to the specific situation.

[0072] The rotating seat 100 also includes a spring mounting seat 150, through which the adjustment spring 500 can be installed between the sleeve portion 112 and the friction adjustment block 400. Compared with the adjustment spring 500 being directly installed between the sleeve portion 112 and the friction adjustment block 400, the positioning hole 151 is opened on a plane, which makes it easier to achieve a uniform depth of multiple positioning holes 151, thereby avoiding uneven force on the friction adjustment block 400 affecting the combination of the friction adjustment block 400, the friction ring 300 and the inertia ring 200.

[0073] See also Figure 1 and Figure 4 As shown, the inertia ring 200 includes a first ring body 210 , a second ring body 220 and a connecting portion 230 connecting the first ring body 210 and the second ring body 220 . The first ring body 210 is sleeved on the sleeve portion 112 , the second ring body 220 is sleeved on the wheel hub 130 , and the connecting portion 230 cooperates with the friction adjustment block 400 .

[0074] The first ring body 210 is sleeved on the sleeve portion 112, and the second ring body 220 is sleeved on the hub 130. That is to say, the inertia ring 200 is rotatably mounted on the rotating seat 100 as a whole. When the rotating seat 100 rotates at a low speed, the inertia ring 200 is separated from the rotating seat 100. When the rotating seat 100 rotates at a high speed, the inertia ring 200 is combined with the rotating seat 100, thereby increasing the moment of inertia and damping.

[0075] See also Figure 1 and Figure 4 As shown, the inertia ring 200 further includes a support ring 240 , which is disposed on a side of the connecting portion 230 close to the friction adjustment block 400 , and the friction adjustment block 400 is located between the support ring 240 and the sleeve portion 112 .

[0076] The support ring 240 is arranged on the side of the connecting portion 230 close to the friction adjustment block 400 and supports the friction adjustment block 400. On the one hand, it can prevent the friction adjustment block 400 from falling from the slide groove 1121. On the other hand, it can make the adjustment spring 500 have a certain pre-pressure to avoid the adjustment spring 500 from contacting the friction ring 300 when the rotating seat 100 rotates at a low speed.

[0077] See also Figure 1 and Figure 4As shown, the torsional vibration damper further includes a plurality of bearings 600 , which are disposed between the first ring body 210 and the sleeve portion 112 , between the hub 130 and the second ring body 220 , and between the support ring 240 and the friction adjustment block 400 .

[0078] In addition, a bearing 600 may also be provided between the friction adjustment block 400 and the connection portion 230, and the bearing 600 is located at the connection portion 230 near the support ring 240. When the rotating seat 100 rotates at a low speed, the bearing 600 is provided between the friction adjustment block 400 and the connection portion 230, which can reduce the friction between the friction adjustment block 400 and the connection portion 230. When the rotating seat 100 rotates at a high speed, the friction adjustment block 400 slides upward, and most of the friction adjustment block 400 contacts the bearing 600, and the friction adjustment block 400 contacts the connection portion 230 directly, and the friction adjustment block 400 can drive the inertia ring 200 to rotate through friction.

[0079] The bearing 600 is arranged between the first ring body 210 and the sleeve portion 112, between the hub 130 and the second ring body 220, and between the support ring 240 and the friction adjustment block 400. The bearing 600 can reduce the resistance to relative rotation between the inertia ring 200 and the rotating seat 100 and reduce the friction power consumption of the torsional vibration damper.

[0080] It should be noted that when bearings 600 are arranged between the friction adjustment block 400 and the support ring 240 and the connecting part 230, a bearing 600 can be arranged between the friction adjustment block 400 and the support ring 240, and between the friction adjustment block 400 and the connecting part 230, respectively, but it is not limited to this. L-shaped bearings 600 can also be arranged between the friction adjustment block 400 and the support ring 240 and the connecting part 230, depending on the specific situation.

[0081] The present application also provides an automobile, which includes a torsional vibration damper and a crankshaft. The torsional vibration damper is installed on the crankshaft through a first mounting hole 1111 and a second mounting hole 131 to reduce the torsional vibration of the crankshaft.

[0082] The automobile includes a torsional vibration damper, and the vibration damping performance of the torsional vibration damper can change with the crankshaft speed. At low speed, the crankshaft drives the cover plate 110 and the friction adjustment block 400 to rotate, the damping and inertia provided by the torsional vibration damper are small, and the vibration damping performance of the torsional vibration damper is weak. At high speed, the crankshaft drives the cover plate 110, the friction adjustment block 400 and the inertia ring 200 to rotate, the damping and inertia provided by the torsional vibration damper are large, and the vibration damping performance of the torsional vibration damper is strong. Compared with the silicone oil vibration damper, the vibration damping performance of the torsional vibration damper in the present application is positively correlated with the speed, and the ability to adjust the vibration damping performance according to the speed is stronger.

[0083] The terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the feature. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0084] In this application, unless otherwise clearly specified and limited, the terms "assembly", "connection" and the like 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0085] In the description of this specification, the description with reference to the terms "some embodiments", "exemplarily", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0086] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application. Therefore, any changes or modifications made in accordance with the claims and description of the present application should fall within the scope of the patent of this application.

Claims

1. A torsional vibration damper, characterized in that: include: The rotating seat comprises a cover plate, wherein the cover plate comprises an end cover portion and a sleeve portion arranged around the end cover portion, and the end cover portion or the sleeve portion is provided with a slide groove; An inertia ring is rotatably disposed at one end of the sleeve portion away from the end cover portion; a friction ring, disposed in the sleeve portion; a friction adjustment block, disposed in the slide groove and at least partially located between the friction ring and the inertia ring; an adjustment spring, arranged between the inner wall of the sleeve portion and the friction adjustment block; Wherein, the friction adjustment block can slide along the radial direction of the sleeve portion so that the torsional vibration damper has a first state and a second state. In the first state, the friction adjustment block is located at one end of the slide groove close to the axis of the sleeve portion and is separated from the friction ring and the inertia ring. In the second state, the friction adjustment block is located at one end of the slide groove away from the axis of the sleeve portion and is combined with the friction ring and the inertia ring. The friction adjustment block drives the inertia ring to rotate with the rotating seat.

2. The torsional vibration damper according to claim 1, characterized in that: The side of the friction ring close to the inertia ring is an inclined surface, and the friction adjustment block includes a wedge-shaped portion. In a first state, the wedge-shaped portion is located on the side of the inclined surface close to the axis of the sleeve portion and is separated from the inclined surface. In a second state, the wedge-shaped portion is combined with the inclined surface and the inertia ring.

3. The torsional vibration damper according to claim 2, characterized in that: The rotating seat further comprises a butterfly spring, and the friction ring is arranged on the end cover portion through the butterfly spring.

4. The torsional vibration damper according to claim 3, characterized in that: The rotating seat also includes a hub and a rivet, the hub is located on the side of the end cover portion close to the inertia ring, the butterfly spring is at least partially located between the hub and the end cover portion, and the rivet connects the end cover portion, the butterfly spring and the hub.

5. The torsional vibration damper according to claim 1, characterized in that: There are a plurality of slide grooves arranged on the inner wall of the sleeve portion, and there are a plurality of friction adjustment blocks arranged in the slide grooves in a one-to-one correspondence.

6. The torsional vibration damper according to claim 5, characterized in that A plurality of adjustment springs are arranged between each friction adjustment block and the sleeve portion, the rotating seat also includes a spring mounting seat, the spring mounting seat is arranged at the bottom of the slide groove, the opposing surfaces of the spring mounting seat and the friction adjustment block are planes, the spring mounting seat has a positioning hole, one end of the adjustment spring is located in the positioning hole, and the other end of the adjustment spring abuts against the friction adjustment block.

7. The torsional vibration damper according to claim 1, characterized in that: The rotating seat also includes a hub, which is arranged on the side of the end cover portion close to the inertia ring. The inertia ring includes a first ring body, a second ring body and a connecting portion connecting the first ring body and the second ring body. The first ring body is sleeved on the sleeve portion, the second ring body is sleeved on the hub, and the connecting portion cooperates with the friction adjustment block.

8. The torsional vibration damper according to claim 7, characterized in that: The inertia ring further includes a support ring, which is arranged on a side of the connecting portion close to the friction adjustment block, and the friction adjustment block is located between the support ring and the sleeve portion.

9. The torsional vibration damper according to claim 8, characterized in that The torsional vibration damper further includes a plurality of bearings, which are disposed between the first ring body and the sleeve portion, between the hub and the second ring body, and between the support ring and the friction adjustment block.

10. An automobile, characterized in that: include: The torsional vibration damper according to any one of claims 1 to 9; A crankshaft is connected to the cover plate of the torsional vibration damper.

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