A torsional vibration damper

Abstract

The present invention belongs to the technical field of torsional vibration dampers, and specifically discloses a torsional vibration damper, comprising two friction plates, a driven disc body is arranged between the two friction plates, a disc hub is arranged on one side of the driven disc body, a spline shaft sleeve is fixedly connected at the axis of the disc hub, and a damper disc is arranged on the side of the disc hub away from the driven disc body; this structure can achieve the effect of preliminary elimination of torque transmission fluctuations under the action of a first spring, and achieve the elimination of second and third stage torque transmission fluctuations under the action of a damping mechanism, and in this process, an adjustment block is used to squeeze the air stored in the temporary storage chamber, and when the squeezed air passes through the second one-way valve, the squeezed air will generate resistance, thereby achieving the effect of eliminating torque fluctuations in the fourth stage, effectively improving the elimination of torque fluctuations, reducing the influence of resonance, and multi-stage triggering the elimination of torque fluctuations, thereby improving the application range of the structure and enhancing the effect of eliminating resonance.

Description

Technical Field

[0001] The invention belongs to the technical field of torsional vibration dampers, and in particular relates to a torsional vibration damper. Background Art

[0002] Torsional vibration damper is an important component in automobile clutch, mainly composed of elastic elements and damping elements. The spring element is used to reduce the torsional stiffness of the head end of the transmission system, thereby reducing a certain order natural frequency of the torsional system of the transmission system, changing the natural vibration mode of the system, so that it can avoid the excitation caused by the main harmonic excitation of the engine torque. The driven plate torsional vibration damper component transmits the engine torque to the transmission through friction conversion, reduces the vibration and impact of the transmission system, and completes the "clutch" and "engagement" tasks.

[0003] The existing torsional vibration damper mainly eliminates the resonance during torque transmission by using a damping spring, and the vibration reduction effect is single. In addition, the heat generated by friction during the operation of the torsional vibration damper cannot be dissipated in time, resulting in heat accumulation that affects the normal use of the structure. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a torsional vibration damper.

[0005] To achieve the above objectives, the present invention provides a torsional vibration damper, comprising two friction plates, a driven disc body is arranged between the two friction plates, a disc hub is arranged on one side of the driven disc body, a spline sleeve is fixedly connected to the axis of the disc hub, and a damper disc is arranged on the side of the disc hub away from the driven disc body; and also includes a damping mechanism; wherein the damping mechanism includes a buffer component and an auxiliary component.

[0006] In the above technical solution, further, the buffer assembly includes two connecting plates fixedly connected to the surface of the shock absorber disk and symmetrically distributed, the surface of the driven disk body is provided with two symmetrically distributed sliding grooves, the inner wall of the sliding groove is slidably connected with a slider, one end of the slider passes through the sliding groove and is fixedly connected to the surface of the adjacent connecting plate.

[0007] In the above technical solution, further, a guide rod is fixedly connected to the surface of the connecting plate, the other end of the guide rod passes through the driven disk body and is slidably connected to the inner wall of the driven disk body, and a second spring is sleeved on the surface of the guide rod.

[0008] In the above technical solution, further, one end of the second spring is fixedly connected to the inner wall of the slide groove, and the other end of the second spring is fixedly connected to the surface of the slider.

[0009] In the above technical solution, further, the auxiliary component includes two adjustment cavities opened inside the driven disk body and symmetrically distributed, the guide rod extends to the interior of the adjustment cavity at one end away from the slider, the inner wall of the adjustment cavity is slidably connected with an adjustment block, the adjustment block and the guide rod form a trigger area, the side of the adjustment block away from the guide rod is fixedly connected with a third spring, and the other end of the third spring is fixedly connected to the inner wall of the adjustment cavity.

[0010] In the above technical solution, further, a temporary storage chamber is formed between the side of the adjusting block away from the guide rod and the inner wall of the adjusting chamber, the inner wall of the adjusting chamber is provided with an air inlet hole connected to the outside world, and the temporary storage chamber is connected to the outside world through the air inlet hole, and a first one-way valve is arranged inside the air inlet hole.

[0011] In the above technical solution, further, two symmetrically distributed air passages are opened inside the driven disk body, one end of the air passage is connected to the adjacent temporary storage cavity, and a second one-way valve is arranged inside the air passage.

[0012] In the above technical solution, further, the surface of the driven disk body is fixedly connected with evenly distributed heat sinks, the inner wall of the air duct is provided with evenly distributed exhaust holes connected to the outside, and the exhaust holes are staggered with the heat sinks.

[0013] In the above technical solution, further, the surface of the driven disk body is provided with annularly distributed installation cavities, the surface of the shock absorber disk is provided with installation holes corresponding to the installation cavities, the surface of the disk hub is provided with through holes corresponding to the installation holes, and an installation area is formed between adjacent installation cavities, installation holes and through holes, and a first spring is arranged inside the installation area.

[0014] In the above technical solution, further, the surface of the disk hub is provided with evenly distributed adjustment grooves, and the surface of the driven disk body is provided with rivets located inside the adjustment grooves.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The structure can achieve the effect of initially eliminating the fluctuation of torque transmission under the action of the first spring, and achieve the effect of eliminating the torque fluctuation in the second stage under the cooperation of the slider, the slide groove, the guide rod, the driven disc body, the connecting plate and the second spring, and achieve the effect of eliminating the torque fluctuation in the third stage under the joint action of the guide rod, the adjustment block and the third spring. In this process, the adjustment block is used to squeeze the air stored in the temporary storage chamber. When the squeezed air passes through the second one-way valve, the squeezed air will generate resistance, and the effect of eliminating the torque fluctuation in the fourth stage is achieved, which effectively improves the elimination of the torque fluctuation and reduces the influence of the resonance. The multi-stage triggering of the elimination of the torque fluctuation increases the scope of application of the structure and strengthens the effect of eliminating the resonance.

[0017] The setting of the auxiliary component can use the heat sink to dissipate the heat generated by friction during the use of the driven disc body, reduce the situation that the metal performance is reduced due to heat accumulation and affects the vibration reduction effect, and avoid the situation that the elastic potential energy of the first spring, the second spring and the third spring is reduced due to heat accumulation, effectively improve the stability of the structure during use, and ensure a good vibration reduction effect;

[0018] In the fourth stage of eliminating torque fluctuations, the air stored in the temporary storage chamber can be actively discharged, and this part of the gas can be used to strengthen the air flow around the driven disk body, thereby strengthening the heat exchange effect of the surrounding air, so as to achieve the effect of improving heat dissipation. The fourth stage of eliminating torque fluctuations is triggered when the rotation angle of the driven disk body is too large. This setting method can self-adjust the heat dissipation effect according to the change of the rotation angle of the driven disk body, thereby improving the practicality of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a torsional vibration damper proposed by the present invention;

[0020] Figure 2 A schematic diagram of the structure of a torsional vibration damper proposed by the present invention;

[0021] Figure 3 A partial cross-sectional schematic diagram of a torsional vibration damper proposed by the present invention;

[0022] Figure 4 A schematic diagram of the distribution of the first spring and the disc hub of a torsional vibration damper proposed by the present invention;

[0023] Figure 5 A schematic diagram of the structure of a torsional vibration damper auxiliary component and a driven disc body proposed by the present invention;

[0024] Figure 6 A schematic diagram of the structure of a torsional vibration damper proposed by the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of a torsional vibration damper proposed by the present invention.

[0026] In the figure: 1. friction plate; 2. driven plate body; 201. shock absorber plate; 202. plate hub; 203. mounting hole; 204. spline sleeve; 205. mounting cavity; 206. first spring; 207. adjusting groove; 208. rivet; 3. vibration damping mechanism; 31. buffer assembly; 3101. connecting plate; 3102. slider; 3103. slide groove; 3104. guide rod; 3105. second spring; 32. auxiliary assembly; 3201. heat sink; 3202. adjusting block; 3203. adjusting cavity; 3204. third spring; 3205. air inlet; 3206. first one-way valve; 3207. air duct; 3208. exhaust hole; 3209. second one-way valve. DETAILED DESCRIPTION

[0027] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] like Figure 1-Figure 7 A torsional vibration damper shown in the figure comprises two friction plates 1, a driven disc body 2 is arranged between the two friction plates 1, a disc hub 202 is arranged on one side of the driven disc body 2, a spline sleeve 204 is fixedly connected to the axis of the disc hub 202, and a damper disc 201 is arranged on the side of the disc hub 202 away from the driven disc body 2; and also comprises a damping mechanism 3, wherein the damping mechanism 3 comprises a buffer component 31 and an auxiliary component 32;

[0029] like Figure 1-Figure 7 The surface of the driven disc body 2 is provided with annularly distributed mounting cavities 205, the surface of the damper disc 201 is provided with mounting holes 203 corresponding to the mounting cavities 205, the surface of the disc hub 202 is provided with through holes corresponding to the mounting holes 203, and a mounting area is formed between adjacent mounting cavities 205, mounting holes 203 and through holes, and a first spring 206 is arranged inside the mounting area;

[0030] The surface of the hub 202 is provided with evenly distributed adjustment grooves 207, and the surface of the driven disk body 2 is provided with rivets 208 located inside the adjustment grooves 207;

[0031] When the driven disc body 2 is rotated by force, the first spring 206 can be squeezed through the inner wall of the installation cavity 205. In this process, the first spring 206 can be used to eliminate resonance, so that the fluctuation of torque transmission can be consumed by the elastic potential energy of the first spring 206, and then the rivet 208 pushes the inner wall of the adjustment groove 207 to drive the disc hub 202 to rotate, so as to achieve the effect of transmitting the torque after eliminating the fluctuation to the spline sleeve 204;

[0032] like Figure 1-Figure 7The buffer assembly 31 includes two connecting plates 3101 fixedly connected to the surface of the shock absorber plate 201 and symmetrically distributed. The surface of the driven plate body 2 is provided with two symmetrically distributed sliding grooves 3103. The inner wall of the sliding groove 3103 is slidably connected with a slider 3102. One end of the slider 3102 passes through the sliding groove 3103 and is fixedly connected to the surface of the adjacent connecting plate 3101.

[0033] A guide rod 3104 is fixedly connected to the surface of the connecting plate 3101, the other end of the guide rod 3104 penetrates the driven disc body 2 and is slidably connected to the inner wall of the driven disc body 2, and a second spring 3105 is sleeved on the surface of the guide rod 3104;

[0034] One end of the second spring 3105 is fixedly connected to the inner wall of the slide groove 3103, and the other end of the second spring 3105 is fixedly connected to the surface of the slider 3102;

[0035] When the driven disk body 2 rotates to a certain angle, it can drive the slider 3102 to slide along the inner wall of the slide groove 3103. During this process, the slider is guided by the guide rod 3104 and the second spring 3105 is compressed to achieve a two-stage torque fluctuation elimination effect. At the same time, the friction between the guide rod 3104 and the driven disk body 2 can increase the resistance during movement, further enhancing the consumption effect of torque fluctuation transmission, thereby improving the vibration reduction effect.

[0036] like Figure 1-Figure 7 The auxiliary component 32 includes two adjustment chambers 3203 which are opened inside the driven disk body 2 and are symmetrically distributed. The end of the guide rod 3104 away from the slider 3102 extends to the inside of the adjustment chamber 3203. The inner wall of the adjustment chamber 3203 is slidably connected with an adjustment block 3202. The adjustment block 3202 and the guide rod 3104 form a trigger area. The side of the adjustment block 3202 away from the guide rod 3104 is fixedly connected with a third spring 3204. The other end of the third spring 3204 is fixedly connected to the inner wall of the adjustment chamber 3203.

[0037] A temporary storage chamber is formed between the side of the regulating block 3202 away from the guide rod 3104 and the inner wall of the regulating chamber 3203. The inner wall of the regulating chamber 3203 is provided with an air inlet hole 3205 connected to the outside world, and the temporary storage chamber is connected to the outside world through the air inlet hole 3205. A first one-way valve 3206 is arranged inside the air inlet hole 3205.

[0038] Two symmetrically distributed air passages 3207 are provided inside the driven disk body 2, one end of the air passage 3207 is connected to the adjacent temporary storage cavity, and a second one-way valve 3209 is provided inside the air passage 3207;

[0039] The first one-way valve 3206 and the second one-way valve 3209 are both relatively mature components in the prior art, wherein the first one-way valve 3206 can allow the outside air to enter the temporary storage chamber through the air inlet 3205 in one direction, and the second one-way valve 3209 can allow the gas in the temporary storage chamber to pass through the air passage 3207 in one direction;

[0040] The surface of the driven disk body 2 is fixedly connected with evenly distributed heat sinks 3201, and the inner wall of the air passage 3207 is provided with evenly distributed exhaust holes 3208 connected to the outside, and the exhaust holes 3208 and the heat sinks 3201 are staggeredly distributed;

[0041] Under the action of the heat sink 3201, the contact area between the driven disk body 2 and the outside air can be increased, thereby improving the heat exchange efficiency, and the heat generated by friction can be transferred to the heat sink 3201 through the driven disk body 2, reducing the heat generated by friction that cannot be dissipated in time and accumulates to cause structural overheating that affects the use of the first spring 206, the second spring 3105 and the third spring 3204;

[0042] When the driven disk body 2 rotates at an excessively large angle, the heat generated by the friction force at this time is greater than the heat generated when the rotation angle is small. During this process, the slider 3102 slides along the inner wall of the slide groove 3103, further pushing the guide rod 3104 to pass through the trigger area and contact the surface of the adjustment block 3202. At this time, the slider 3102 can slide further along the slide groove 3103 and push the adjustment block 3202 to slide along the inner wall of the adjustment chamber 3203. During this process, the internal space of the temporary storage chamber can be reduced and the third spring 3204 can be squeezed, so that the air stored inside can be introduced into the interior of the airway 3207 through the second one-way valve 3209, and at the same time, it can The air is discharged through the exhaust hole 3208. In this process, the air flow around the driven disc body 2 can be strengthened, and the heat dissipation effect of the heat generated by friction is further strengthened. The function of self-adjusting the heat dissipation effect according to the change of the rotation angle of the driven disc body 2 is realized, and the practicality of the structure is improved. When the driven disc body 2 is reset, the third spring 3204 can drive the adjustment block 3202 to reset, thereby increasing the internal space of the temporary storage cavity. At this time, the internal space of the temporary storage cavity forms a low pressure compared with the outside. Under the action of the air pressure difference, the outside air can pass through the air inlet hole 3205 and the first one-way valve 3206 into the internal storage of the temporary storage cavity for reuse;

[0043] In the process that the guide rod 3104 passes through the trigger area and pushes the adjustment block 3202 to slide along the inner wall of the adjustment chamber 3203, the third stage of the effect of eliminating torque fluctuation can be achieved through the elastic force of the third spring 3204. At the same time, when the adjustment block 3202 squeezes the air stored in the temporary storage chamber, the squeezed air can pass through the second one-way valve 3209, and the squeezed air will generate resistance, thereby achieving the fourth stage of the effect of eliminating torque fluctuation, effectively improving the elimination of torque fluctuation and reducing the influence of resonance.

[0044] Working principle: When the driven disc body 2 is rotated by force, the first spring 206 can be squeezed through the inner wall of the installation cavity 205. In this process, the first spring 206 can be used to eliminate resonance, so that the fluctuation of torque transmission can be consumed by the elastic potential energy of the first spring 206, and then the rivet 208 pushes the inner wall of the adjustment groove 207 to drive the disc hub 202 to rotate, so that the torque after eliminating the fluctuation is transmitted to the spline sleeve 204. When the driven disc body 2 rotates to a certain angle, the slider 3102 can be moved along the inner wall of the slide groove 3103. During the sliding process, the guide rod 3104 guides it and compresses the second spring 3105 to achieve the two-stage torque fluctuation elimination effect. At the same time, the friction between the guide rod 3104 and the driven disk body 2 can increase the resistance during movement, further enhancing the consumption effect of torque fluctuation transmission, thereby improving the vibration reduction effect. When the driven disk body 2 rotates too much, the guide rod 3104 passes through the trigger area and pushes the adjustment block 3202 to slide along the inner wall of the adjustment cavity 3203. The third stage of eliminating torque fluctuation can be achieved. At the same time, when the adjusting block 3202 squeezes the air stored in the temporary storage chamber, the squeezed air can pass through the second one-way valve 3209, and resistance will be generated to achieve the fourth stage of eliminating torque fluctuation, effectively improving the elimination of torque fluctuation and reducing the influence of resonance. At the same time, under the action of the auxiliary component 32 and the heat sink 3201, the contact area between the driven disk body 2 and the outside air can be increased, thereby improving the heat exchange efficiency, and the heat generated by friction can be transferred to the heat sink 3201 through the driven disk body 2, thereby reducing the heat generated by friction. The heat cannot be dissipated in time and accumulates to cause overheating of the structure, affecting the use of the first spring 206, the second spring 3105 and the third spring 3204, and when the rotation angle of the driven disk body 2 is too large, the air flow can be actively ejected to strengthen the air flow around the driven disk body 2, further strengthening the heat dissipation effect of the heat generated by friction, and realizing the function of self-adjusting the heat dissipation effect according to the change of the rotation angle of the driven disk body 2, thereby improving the practicality of the structure.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A torsional vibration damper, comprising two friction plates (1), characterized in that: A driven disc body (2) is arranged between the two friction plates (1); a disc hub (202) is arranged on one side of the driven disc body (2); a spline sleeve (204) is fixedly connected to the axis of the disc hub (202); and a damper disc (201) is arranged on the side of the disc hub (202) away from the driven disc body (2); Also included is a vibration reduction mechanism (3), wherein the vibration reduction mechanism (3) comprises a buffer component (31) and an auxiliary component (32); The buffer assembly (31) comprises two connecting plates (3101) fixedly connected to the surface of the damper disc (201) and symmetrically distributed, the surface of the driven disc body (2) is provided with two symmetrically distributed sliding grooves (3103), the inner wall of the sliding groove (3103) is slidably connected with a slider (3102), one end of the slider (3102) passes through the sliding groove (3103) and is fixedly connected to the surface of the adjacent connecting plate (3101); A guide rod (3104) is fixedly connected to the surface of the connecting plate (3101); the other end of the guide rod (3104) passes through the driven disc body (2) and is slidably connected to the inner wall of the driven disc body (2); and a second spring (3105) is sleeved on the surface of the guide rod (3104); One end of the second spring (3105) is fixedly connected to the inner wall of the slide groove (3103), and the other end of the second spring (3105) is fixedly connected to the surface of the slider (3102); The auxiliary component (32) comprises two adjustment cavities (3203) which are opened inside the driven disk body (2) and are symmetrically distributed; one end of the guide rod (3104) away from the slider (3102) extends into the interior of the adjustment cavity (3203); an adjustment block (3202) is slidably connected to the inner wall of the adjustment cavity (3203); the adjustment block (3202) and the guide rod (3104) form a triggering area; a third spring (3204) is fixedly connected to one side of the adjustment block (3202) away from the guide rod (3104); and the other end of the third spring (3204) is fixedly connected to the inner wall of the adjustment cavity (3203); A temporary storage chamber is formed between the side of the regulating block (3202) away from the guide rod (3104) and the inner wall of the regulating chamber (3203); an air inlet (3205) communicating with the outside is provided on the inner wall of the regulating chamber (3203); and the temporary storage chamber is connected to the outside through the air inlet (3205); a first one-way valve (3206) is provided inside the air inlet (3205); Two symmetrically distributed air passages (3207) are provided inside the driven disk body (2); one end of the air passage (3207) is connected to the adjacent temporary storage cavity, and a second one-way valve (3209) is provided inside the air passage (3207); The surface of the driven disk body (2) is fixedly connected with evenly distributed heat sinks (3201), the inner wall of the air passage (3207) is provided with evenly distributed exhaust holes (3208) that are connected to the outside, and the exhaust holes (3208) and the heat sinks (3201) are staggered.

2. A torsional vibration damper according to claim 1, characterized in that: The surface of the driven disc body (2) is provided with annularly distributed mounting cavities (205), the surface of the damper disc (201) is provided with mounting holes (203) corresponding to the mounting cavities (205), the surface of the disc hub (202) is provided with through holes corresponding to the mounting holes (203), and a mounting area is formed between the adjacent mounting cavities (205), mounting holes (203) and through holes, and a first spring (206) is arranged inside the mounting area.

3. A torsional vibration damper according to claim 1, characterized in that: The surface of the disk hub (202) is provided with evenly distributed adjustment grooves (207), and the surface of the driven disk body (2) is provided with rivets (208) located inside the adjustment grooves (207).

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