JP2004183738A - Liquid inclusion mount - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid inclusion mount capable of reducing permanent setting of a seal member, having no slackness of sealing force to the seal member in spite of permanent setting, having no leakage of liquid, dispensing a periodic inspection and early component exchange, having longer durability, and facilitating manufacture. <P>SOLUTION: A seal structure C composed of an upper shell body 11 and a lower shell body 12 as components of a liquid chamber in the liquid filled mount is provided with surface contact portions 11a and 12a, and a recessed portion 28 laying a separate seal member 27 between the surface contact portions and housing a part of them. The seal structure C seals the liquid chamber via a serration bolt so that the upper shell body 11 and the lower shell body 12 are fastened, the surface contact portions 11a and 12a are firmly stuck each other, and the separate circular seal member 27 is compressed and housed into the recessed portion 28. The liquid chamber is sealed through a serration bolt. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a liquid-filled mount such as a liquid-filled engine mount or a damper mount of an automobile, and more specifically, a seal structure between an upper shell and a lower shell, which are components of the liquid chamber, has a surface contact portion between them. And a part for interposing a separate seal member between them and accommodating a part thereof. Liquid seal mount that seals through.
[0002]
[Prior art]
This type of liquid-filled mount has important functions such as attenuating the vibration of the wheels and supplying power.However, there is a possibility that the liquid leaks from the seal with the passage of time. In such a situation, the function of the liquid-filled mount is lost at that point. The problems of the prior art will be described using an example of a damper mount as an example of a liquid-filled mount.
As a prior art of a liquid-filled damper mount, for example, one shown in FIG. 8 is known.
[0003]
According to this prior art, when the vibration of the wheel is input and the rod c moves upward, in other words, when the rod c enters the case b of the damper a, it is attenuated by the damper a and, in addition, the lower elastic body d is also elastically deformed by compression. In the reverse case, in addition to the damping of the damper a, the upper elastic body e is also attenuated by the elastic deformation due to compression, thereby reducing the transmission of vibration to the vehicle body f. is there. Furthermore, the inclination of the axis of the damper a due to the vibration of the wheel can be absorbed by the elastic deformation of the lower elastic body d and the upper elastic body e. In the case where the rod c largely sinks into the case b of the damper a due to large vibration, the upper surface of the case b hits the bump stopper S, and the amount of contraction of the damper a is regulated.
[0004]
In the above example, since the damping performance of the damper a against the vibration of the wheel is supplemented by the elastic deformation of the elastic body itself such as rubber, the performance is naturally limited. Further, as a device that obtains a larger complementary damping performance, there is known a liquid-filled damper mount (Japanese Patent Application Laid-Open No. 2002-257184) as shown in FIG.
This prior art discloses an upper and lower elastic members i and j for connecting an upper shell g and a lower shell h fixed to a vehicle body f to a damper a, the upper and lower elastic members i and j, and a cylinder. A liquid chamber 1 defined by a body k, an upper shell g and a lower shell h, a diaphragm chamber n defined by a cylindrical body k, a diaphragm m, and a lower elastic member j, and a liquid chamber 1 and a diaphragm chamber n. And a passage o communicating therewith.
[0005]
When the vibration of the wheel is input and the rod c moves upward in the same manner as described above, that is, when the rod c is immersed in the case b of the damper a, the rod c is attenuated by the damper a and the elasticity due to the compression of the upper elastic member i. It is attenuated by the deformation and the elastic deformation of the lower elastic member j due to the shearing force, and the volume of the liquid chamber 1 is reduced by the elastic deformation of the upper and lower elastic members i and j, and the liquid enters the diaphragm chamber n to expand the diaphragm m. Decay. In the opposite case, in addition to the damping of the damper a, the elastic member is attenuated by the elastic deformation caused by the extension of the upper elastic member i and the elastic deformation caused by the shear force of the lower elastic member j, and the elasticity of the upper and lower elastic members i and j is reduced. Due to the deformation, the volume of the liquid chamber 1 increases, and the liquid enters the liquid chamber 1 from the diaphragm chamber n to contract and attenuate the diaphragm m. The inclination of the axis of the damper a due to the vibration of the wheel can be absorbed in the same manner as described above. In any case, the upper surface of the case b hits the bump stopper S due to the large vibration, and the amount of contraction of the damper a is regulated as in the above example.
[0006]
[Problems to be solved by the invention]
However, the above-described liquid-filled damper mount of the prior art is characterized in that the liquid enters and exits through the passage o between the liquid chamber l and the diaphragm chamber n, thereby further complementing the damping performance of the damper a against the vibration of the wheels. However, when the upper shell g and the lower shell h are fixed to the vehicle body f with bolts p, as shown in FIG. 11, the upper elastic member i is located between the upper shell g and the lower shell h. And directly tighten the bolt p without bringing the upper shell g and the lower shell h into surface contact, and strongly compress the seal member q to seal the liquid in the liquid chamber l. ing. For this reason, the sealing member q, which is constantly strongly compressed, may be further strongly compressed due to vibrations during actual use, so that the sealing member q is easily depressed, and the tightening force of the bolt p is relatively reduced, and the bolt p is gradually reduced. Looseness occurs, and there is a possibility that the liquid in the upper liquid chamber 1 leaks. Therefore, in order to prevent the liquid in the liquid chamber 1 from leaking, there is a need to periodically retighten the bolt p in accordance with the degree of settling of the sealing member q, or depending on the degree of setting of the sealing member q, It involves cumbersome work, such as the need to replace the liquid-filled damper mount early. In addition, since the seal member q is integrally formed with the upper elastic member i, there is a problem that the production is troublesome.
[0007]
Also, by caulking the periphery of the upper shell g toward the lower shell h, the sealing member q is strongly compressed to seal the liquid in the liquid chamber l, and the upper shell g and the lower shell h are separated from each other. In some cases, the bolt p is used only for fixing to the vehicle body f. Also in this case, the sealing member q which is always strongly compressed by the vibration at the time of actual use may be further strongly compressed. The seal of the liquid in the liquid chamber 1 gradually loosens, and eventually the liquid in the liquid chamber 1 leaks. Therefore, in order to prevent the liquid in the liquid chamber 1 from leaking, it is not possible to cope with the problem by periodically retightening the bolt p, and it is necessary to replace the liquid filled damper mount as soon as possible. Further, the caulking process has a problem that a bending process and a compression process of the caulked portion are indispensable, and a troublesome operation such as replacement of a pressing jig or a bending jig is required.
[0008]
Therefore, an object of the present invention is to reduce the sealing process while avoiding sagging of the sealing member as much as possible, and even if some sagging occurs, the loosening between the upper shell and the lower shell does not occur. As a result, there is no loosening of the sealing force of the seal member and no liquid leakage, and there is no need for periodic inspections or early replacement on top of that, so the liquid-filled damper mount has improved durability and is easy to manufacture. Is to provide.
[0009]
[Means for Solving the Problems]
The present invention has been proposed to achieve the above object, and has the following configuration. That is,
According to the present invention, the seal structure of the upper shell and the lower shell, which are components of the liquid chamber of the liquid-enclosed mount, has a surface contact portion between them and a separate seal member interposed therebetween. And a portion for accommodating a part thereof, and tightening the upper shell and the lower shell to bring the surface contact portion into close contact with each other and compress the separate seal member, thereby forming the liquid chamber. There is provided a liquid-filled mount characterized by sealing via a serration bolt.
With this configuration, while reducing the sealing process, the upper shell and the lower shell are tightened at their surface contact portions, and by this tightening, a separate sealing member is compressed and accommodated, so that there is no strength of compression due to vibration, The looseness between the upper shell and the lower shell due to the settling of the seal member is eliminated, and the effect that the force compressing the seal member does not change and the liquid does not leak can be achieved.
[0010]
Further, according to the present invention, a portion of the seal structure that accommodates a part of the seal member is a concave portion provided in at least one of the upper shell and the lower shell, and the concave is formed by the upper shell and the lower shell. A liquid-filled damper mount is provided in which the seal member is interposed between at least the other of the lower shells and a part of the seal member can be accommodated.
With this configuration, in addition to the configuration of the first aspect, further sealing performance is ensured.
[0011]
Further, according to the present invention, the part of the seal structure that accommodates a part of the seal member is a step provided on at least one of the upper shell and the lower shell, and the step is formed by the upper shell and the lower shell. Provided is a liquid-filled mount in which a separate annular sealing member is interposed between at least the other of the lower shells and a part thereof can be accommodated.
In this configuration, in addition to the configuration of the first aspect, it is possible to further secure the sealing performance.
[0012]
Further, according to the present invention, there is provided a liquid-sealed mount in which one or more annular sealing ridges are provided on the surface of the annular sealing member partially accommodated in the step.
Thus, the upper shell and the lower shell are effectively sealed over the entire surface.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an example of a liquid-filled damper mount will be described as an embodiment of the present invention with reference to the drawings.
FIG. 1 is a sectional view of a liquid filled damper mount showing an embodiment of the present invention, and FIG. 2 is a sectional view of a seal structure of the liquid filled damper mount showing an embodiment of the present invention. In the figure, a liquid filled damper mount 1 is interposed between a suspended damper 2 mounted on wheels (not shown) and a vehicle body 3, that is, mounted on the upper part of the damper 2 while being mounted on the vehicle body 3. Have been. In this damper 2, a rod 5 is attached to the upper part of the damper case 4 so as to be able to protrude and retract, and the rod 5 is made to protrude and retract in the damper case 4 by receiving vibrations from the wheels. . On the other hand, the liquid-filled damper mount 1 attenuates the vibration from the wheels by the damper 2 and then complements the damping performance to improve the coupling between the wheels and the vehicle body 3 in terms of the vibration damping.
[0014]
The rod 5 of the damper 2 has a large-diameter portion 5a and a small-diameter portion 5b formed from the damper case 4 side, and a screw 6 is engraved at the tip of the small-diameter portion 5b, so that the large-diameter portion 5a and the small-diameter portion 5b are formed. The liquid-filled damper mount 1 is inserted and attached by screwing a nut 7 to a screw 6. The liquid-filled damper mount 1 has a bottomed cylindrical body 10, an upper shell 11, a lower shell 12, an upper elastic member 13, and a lower elastic member 14, which are constituent elements of a liquid chamber 23 described later.
[0015]
The bottomed cylindrical body 10 is fitted to the small diameter portion 5b of the rod 5 in a state where the bump stopper 15 and the resin washer 16 are housed. That is, the bump stopper 15 is fitted on the large-diameter portion 5a, the resin washer 16 is fitted on the small-diameter portion 5b thereon, and the bump stopper 15 rests on the step surface formed by the large-diameter portion 5a. Is located on the resin washer 16. The bump stopper 15 is made of an elastic material such as rubber. The lower end surface of the bump stopper 15 has a predetermined distance from the upper surface of the damper case 4 so that the rod 5 can be largely immersed in the damper case 4 due to large vibration. The upper surface of the damper case 4 contacts the lower end surface of the bump stopper 15, and regulates the contraction amount of the rod 5. The resin washer 16 supports the bump stopper 15 together with the bottom surface of the bottomed cylindrical body 10.
[0016]
Further, a collar 17 and a washer 18 are fitted on the small-diameter portion 5b of the rod 5 on the bottomed cylindrical body 10, and are fixedly fastened by the nut 7 described above. The upper elastic member 13 is vulcanized and adhered to the outer peripheral surface of the collar 17, and the upper elastic member 13 is sandwiched and fixed between the upper surface of the bottomed cylindrical body 10 and the washer 18 to be in a sealed state.
[0017]
The upper shell 11 has a circular dish shape, and has a folded hole in the center thereof. The folded hole is buried in the upper elastic member 13 and is in a sealed state together with prevention of detachment. . The lower shell 12 has a cylindrical shape with a flange, and is in close contact with the upper shell 11 in a sealed state. These are main components of the liquid chamber 23.
[0018]
The inner surface of the lower elastic member 14 is vulcanized and bonded to the outer surface of the collar 20 press-fitted to the outer surface of the bottomed cylindrical body 10. It is in a sealed state by sulfur bonding. On the other hand, the diaphragm 21 extends from the lower end of the lower elastic member 14 and is fixed to the outer peripheral surface on the lower end side of the bottomed cylindrical body 10 by a ring 22 to be in a sealed state.
[0019]
The liquid chamber 23 is defined in a sealed state with the bottomed cylindrical body 10, the upper shell 11, the lower shell 12, the upper elastic member 13, the lower elastic member 14, and the collar 20 participating in this. In addition, a diaphragm chamber 24 is defined in a sealed state by the bottomed cylindrical body 10, the collar 20, the lower elastic member 14, and the diaphragm 21. The liquid chamber 23 and the diaphragm chamber 24 communicate with each other through a passage 20a provided in the collar 20, and the external force applied to the liquid chamber 23 and the diaphragm chamber 24 causes the filled liquid, that is, the working oil 32, to move back and forth in the passage 20a. Is used to supplement the damping performance after the vibration from the wheels is damped by the damper 2.
[0020]
The liquid-filled damper mount 1 thus configured includes an upper block A including an upper shell 11, an upper elastic member 13, and a collar 17, a bottomed cylindrical body 10, a lower shell 12, a lower elastic member 14, and a collar 20. , And a lower block B composed of a diaphragm 21 and a ring 22. Then, the upper block A and the lower block B are press-fitted with the serration bolts 25 in the lower shell 12 and the upper shell 11, further passed through the vehicle body 3 and fastened by the nuts 26 to be fixed to the vehicle body 3. At the same time, the upper block A and the lower block B are sealed.
In FIG. 1, reference numeral 40 denotes a spring seat, and reference numeral 41 denotes a mounting spring for buffering the vertical movement of a knuckle (not shown) that rotatably supports wheels together with the damper 2.
[0021]
As shown in FIG. 2, the sealing structure C of the upper shell 11 and the lower shell 12 for sealing the upper block A and the lower block B has portions 11a and 12a which are in surface contact with each other, as shown in FIG. And a portion that accommodates a part of the sealing member 27, that is, a concave portion 28 provided in the lower shell 12, and the upper shell 11 and the lower shell 12 are tightened. As shown in FIG. 3, the serration bolt 25 is press-fitted, the surface contact portions 11a and 12a are brought into close contact with the press-holding force, and the seal member 27 on the concave portion 28 is compressed by the upper shell 11, and the liquid chamber 23 is pressed. Is to be sealed. By performing the above-mentioned sealing via the serration bolts, unlike the conventional liquid-filled damper mount, the sealing by caulking is not performed, and a simpler and stronger seal is achieved. The concave portion 28 may be provided on the upper shell 11 or on both sides, and may have any shape. The seal member 27 may have any shape.
[0022]
As an example, for example, FIG. 4 shows a separate seal member 27a in a sheet shape, FIG. 5 shows a separate seal member 27b having a U-shaped cross section, and the concave portion 28 has an upper shell 11 and a lower shell. 12 are provided on both sides.
[0023]
As shown in FIG. 6, the recess 28 may be a step 28a provided in the lower shell 12, and this step 28a is easily formed by pressing, and a separate annular sealing member 29 is provided in the step 28a. Is attached. The step 28a formed on the lower shell 12 by pressing is, for example, about 0.2 mm when the thickness of the lower shell 12 is 1.2 mm, and the ring-shaped sealing member 29 is, for example, 0 mm. 0.4 to 0.5 mm. Therefore, the ring-shaped seal member 29 is only higher than the surface contact portion 12a by about 0.2 to 0.3 mm, and even if the surface contact portions 11a and 12a are brought into close contact, the ring-shaped seal member 29 is not Since it is compressed by only about half and there is no further compression and it seals by this compression, it has sufficient hardness for sealing in this range, for example, styrene, butadiene synthetic rubber (SBR) and natural rubber A seal material having a Shore A hardness of 60 degrees in blending with (NR) must be selected.
[0024]
As shown in FIG. 7, one or more, for example, two annular seal ridges 30 may be provided on the ring-shaped seal member 29 to form a separate seal member 29 a. In addition to the seal by the entire annular seal member 29 higher than the surface contact portion 12a, the seal by the two seal ridges 30 is added, and a still stronger seal is obtained. Further, as shown in FIG. 8, an annular seal member 29a is formed, and a concave groove 31 which is a concave portion along one or more, for example, two annular seal ridges 30 and smaller in volume is formed on the upper shell. The seal may be provided on the body 11, and in addition to the seal by the entire annular seal member 29a, a seal by two seal ridges 30 and a groove 31 along the seal ridges 30 is added.
[0025]
The lower elastic member 14 and the diaphragm 21 are vulcanized and adhesively formed on the outer peripheral surface of the collar 20 and the inner surface of the lower shell 12, and are usually formed as follows. First, an adhesive for vulcanization bonding is applied to the inner peripheral surface of the lower shell 12 and the outer peripheral surface of the collar 20 and dried, and then put into a molding die. A styrene-butadiene-based synthetic rubber (SBR) and a natural rubber (NR) having a Shore A hardness of 60 degrees were set in a pot portion as in Example 29, and heated at 200 ° C. and 200 kg / cm ² at 170 ° C. for 20 minutes. Vulcanization adhesive molding may be performed with a sulfuric acid press.
[0026]
Next, a method of assembling and using the liquid-enclosed damper mount 1 having the above configuration will be described in detail.
First, a liquid-filled damper mount 1 compatible with a damper 2 suspended on a wheel that is a vibration source is selected and the required number is prepared. Next, an integral product in which the lower elastic member 14 is vulcanized and bonded to the outer peripheral surface of the collar 20 and the inner surface of the lower shell 12 is pressed into the bottomed cylindrical body 10, and the diaphragm 21 is further joined by the ring 22 to the bottomed cylindrical body. The lower block B is fixed to the lower end of the outer periphery of the body 10. Then, the upper block A including the upper shell 11, the upper elastic member 13, and the collar 17 is placed on the lower shell 12 of the lower block B, and the serration bolt 25 is press-fitted and set.
[0027]
Further, the bump stopper 15 is fitted to the large diameter portion 5a of the rod 5 of the damper 2, so that the lower end surface thereof has a predetermined distance from the upper surface of the damper case 4. A resin washer 16 is fitted on the small diameter portion 5b of the rod 5 and placed on the stepped surface. A set of the upper block A and the lower block B is further fitted on the small diameter portion 5b, and a washer 18 is further fitted thereon. 7 is screwed to complete the assembly, and the operating oil 32 is injected from the operating oil inlet (not shown) of the upper shell 11 of the upper block A. The serration bolt 25 on which the upper block A and the lower block B are set is passed through the mounting hole of the vehicle body 2 and the nut 7 is screwed and tightened, whereby the mounting is completed.
[0028]
When the automobile runs in this state, the vibration from the wheels is transmitted to the damper 2, and the damper 2 receives the vibration from the wheels and causes the rod 5 to protrude and retract into the damper case 4. Let it. On the other hand, when the rod 5 of the damper 2 moves upward due to the vibration of the wheels, that is, when the rod 5 of the damper 2 is immersed in the damper case 4, the elastic deformation due to the compression of the upper elastic member 13 and the shearing of the lower elastic member 14 It is attenuated by the elastic deformation due to the force, and the volume of the liquid chamber 23 is reduced by the elastic deformation of the upper and lower elastic members 13 and 14, and the hydraulic oil 32 enters the diaphragm chamber 24 through the passage 20a and expands the diaphragm 21 to attenuate. I do.
[0029]
In the opposite case, the elastic deformation due to the extension of the upper elastic member 13 and the elastic deformation due to the shearing force of the lower elastic member 14 attenuate, and the volume of the liquid chamber 23 increases due to the elastic deformation of the upper and lower elastic members 13 and 14. The hydraulic oil 32 enters the liquid chamber 23 from the diaphragm chamber 24 through the passage 20a, and contracts and attenuates the diaphragm 21. The inclination of the axis of the damper 2 due to the vibration of the wheel can be absorbed in the same manner as described above. Further, due to the large vibration, the damper case 4 hits the bump stopper 20 and regulates the contraction amount of the damper 2.
[0030]
That is, the liquid-filled damper mount 1 receives the vibration from the wheels and is attenuated by the damper 2, and then complements the damping performance, thereby improving the coupling between the wheels and the vehicle body 3 in terms of the vibration damping surface. Under such circumstances, even if the liquid-filled damper mount 1 continues to be used, the separate sealing member 27 keeps the surface contact portions 11a and 12a in close contact with each other. As there is no further increase in the tightening pressure, little set-up occurs, and there is almost no change in the sealing pressure, there is no loosening of the serration bolt 25, and therefore, there is almost no leakage of the hydraulic oil 32, and durability is high. Will be rich. At this time, an adhesive may be applied to the seal member 27 and the concave portion 28.
[0031]
Although the embodiment of the present invention has been described above, it should be understood that the specific configuration is not limited to this, and that changes may be appropriately made without departing from the spirit of the present invention.
[0032]
【The invention's effect】
As described above in detail, according to the present invention, the upper shell and the lower shell are tightened at their surface contact portions, and the tightening compresses and accommodates a separate seal member, thereby eliminating the strength of compression due to vibration. Accordingly, there is provided a liquid-enclosed damper mount in which the looseness between the upper shell and the lower shell due to the settling of the seal member is eliminated, the force compressing the seal member does not change, and the liquid inside does not leak. .
In addition, since the seal member is separate, there is no need for periodic inspection and early replacement, and the durability can be improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a liquid-filled damper mount according to an embodiment of the present invention.
FIG. 2 is a sectional view of a seal structure of a liquid-filled damper mount according to the embodiment of the present invention.
FIG. 3 is a cross-sectional view showing a sealing state of a liquid-filled damper mount according to the embodiment of the present invention.
FIG. 4 is a cross-sectional view of another seal member of the liquid-filled damper mount according to the embodiment of the present invention.
FIG. 5 is a cross-sectional view of another seal member of the liquid-filled damper mount according to the embodiment of the present invention.
FIG. 6 is a cross-sectional view of another seal member of the liquid-filled damper mount according to the embodiment of the present invention.
FIG. 7 is a sectional view of another seal member of the liquid-filled damper mount according to the embodiment of the present invention.
FIG. 8 is a sectional view of another seal member of the liquid-filled damper mount according to the embodiment of the present invention.
FIG. 9 is a cross-sectional view showing an example of a conventional liquid-filled damper mount.
FIG. 10 is a sectional view showing an example of a conventional liquid filled damper mount.
FIG. 11 is a cross-sectional view showing an example of a conventional liquid-filled damper mount.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Liquid-filled damper mount 2, a Damper 3, f Body 4 Damper case 5, c Rod 5a Large diameter part 5b Small diameter part 6 Screw 7, 26 Nut 10 Bottomed cylindrical body 11, g Upper shell 11a, 12a Surface contact part 12, h lower shell 13, i upper elastic member 14, j lower elastic member 15, S bump stopper 16 resin washer 17,20 collar 18 washer 20a, o passage 21, m diaphragm 22 ring 23, l liquid chamber 24, n Diaphragm chamber 25 Serration bolts 27, 27a, 27b, q Seal member 28 Recess 28a Step 29 Annular seal member 30 Seal ridge 31 Depressed groove 32 Hydraulic oil 40 Spring seat 41 Mounting spring A Upper block B Lower block C Seal structure b Case d Lower elastic body e Upper elastic body k Cylindrical body p Bolt

Claims (4)

The seal structure of the upper shell and the lower shell, which are components of the liquid chamber of the liquid-enclosed mount, has a part that comes into surface contact with them, a separate seal member interposed between them, and a part thereof. The upper and lower shells are tightened to bring the surface contact portion into close contact with each other, compress the separate sealing member, and seal the liquid chamber through serration bolts. A liquid-filled mount characterized in that: The part of the seal structure that accommodates a part of the seal member is a concave portion provided in at least one of the upper shell and the lower shell, and the concave portion is provided with at least the other of the upper shell and the lower shell. 2. A liquid-filled mount according to claim 1, wherein said seal member is interposed between said mounts and a part of said seal member can be accommodated. The portion of the seal structure that accommodates a part of the seal member is a step provided on at least one of the upper shell and the lower shell, and the step is at least one of the upper shell and the lower shell. 2. The liquid-filled mount according to claim 1, wherein a separate annular seal member is interposed therebetween, and a part thereof can be accommodated. 4. The liquid-filled mount according to claim 3, wherein one or more annular seal ridges are provided on the surface of the annular seal member partially accommodated in the step.

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