KR20200055245A - Engine mount for vehicle and method for manufacturing the same - Google Patents

Abstract

The present invention provides an engine mount for a vehicle and a manufacturing method thereof, wherein the lower shape of a lower insert vulcanized integrally to main rubber is improved in the form of a locking structure so that a nozzle assembly and a diaphragm are coupled to the locking structure of the improved lower insert to significantly reduce the number of mounting parts and the number of assembly processes as well as to simplify the mounting structure. Moreover, the initial enclosed volume of fluid (antifreezing solution) is increased to maintain fluid tightness and to prevent air from entering a fluid chamber.

Description

ENGINE MOUNT FOR VEHICLE AND METHOD FOR MANUFACTURING THE SAME

The present invention relates to an engine mount for a vehicle and a method for manufacturing the same, and more particularly, to improve the assembly structure between the lower insert and the diaphragm having the ring plate during the configuration of the engine mount, reducing the number of parts and reducing the number of assembly processes It relates to a vehicle engine mount and a method for manufacturing the same.

In general, when mounting a power train (Power Tain) including the engine and the transmission in the engine room of the vehicle, engine mounts and transmission mounts are used to effectively reduce vibration and noise transmitted to the vehicle body.

Usually, a fluid mount encapsulating a fluid is used as the mount, and the fluid mount is manufactured in a structure capable of simultaneously damping vibrations in a high frequency region and a low frequency region, and is widely used in various vehicle models.

Here, referring to FIG. 1 to which a conventional fluid enclosed mount is attached, the following will be described.

In Fig. 1, reference numeral 10 denotes a bolt connected to the engine.

The bolt 10 is coupled to the core bush 11, the outer rubber portion of the core bush 11, the main rubber 12 is formed integrally by a method such as vulcanization molding or adhesion, the main rubber 12 At the upper end, the lower insert 13 is integrally vulcanized.

At this time, the upper portion of the main rubber 12 is formed of a concave first fluid chamber 14 to fill the fluid, and the lower insert 13 is integrally vulcanized to increase the lower rigidity of the main rubber 12 Will be.

Subsequently, a nozzle assembly (also referred to as an orifice portion 17) in which the lower plate 15 and the upper plate 16 are mutually coupled to the upper surface of the main rubber 12 is successively arranged, and then the upper portion of the nozzle assembly 17 The diaphragm 18, which is a kind of rubber film, is arranged in a spaced state.

For reference, a flow path for fluid movement between the first fluid chamber 14 and the second fluid chamber 19 is formed in the nozzle assembly (also referred to as an orifice portion 17). A membrane separating the first fluid chamber 14 and the second fluid chamber 19 is mounted.

In other words, the space on the main rubber 12 side is formed by the first fluid chamber 14 with the membrane of the nozzle assembly 17 interposed therebetween, and the space on the diaphragm 18 side is the second fluid chamber 19 It is formed of.

Accordingly, the fluid flows through the flow path of the orifice portion 17 from the first fluid chamber 13 to the second fluid chamber 19 or from the second fluid chamber 19 to the first fluid chamber 13 due to travel vibration or the like. It becomes a state that can move.

Next, a plastic cup 20 is mounted to mutually couple the main rubber 12 and the nozzle assembly 17 and the diaphragm 18.

The plastic cup 20 is a hollow structure, the first engaging jaw 21 is formed at the lower outer diameter portion, and the second engaging jaw 22 is formed at the inner diameter portion of the middle portion.

Thus, when the plastic cup 20 is pressed through the outer diameter portions of the main rubber 12, the nozzle assembly 17, and the diaphragm 18 using a predetermined tool, the lower end of the plastic cup 20 is the main rubber ( It is mounted on the lower insert 13 of 12) to be in close contact, and the second locking jaw 22 is pressed and locked with the edge of the nozzle assembly 17 and the diaphragm 18, and finally the plastic cup 20 The lower insert 13 is locked by a clip (26 in FIG. 2) at the lower end of.

Subsequently, after inserting and placing the bracket 24 connected to the vehicle body frame of the engine room into the outer diameter portion of the main rubber 12, the upper end of the bracket 24 is removed from the plastic cup 20 using a predetermined tool. 1 The bracket 24 is fixed to the plastic cup 20 by bending it toward the locking jaw 21 and locking it.

Therefore, when a large displacement vibration or the like according to the vehicle's rough road driving is input to the conventional fluid mount having the above-described configuration, the fluid in the first fluid chamber 14 is removed through the flow path of the nozzle assembly 17 having an orifice structure. 2 As the fluid chamber 19 is filled, a high attenuation to absorb large displacement vibration is achieved.

On the other hand, when the vehicle's idle vibration or micro displacement vibration due to good road driving is input, the fluid in the first fluid chamber 14 moves toward the second fluid chamber 19 to absorb the micro displacement vibration, and also the membrane As this micro displacement, it absorbs idle vibrations.

However, the above-mentioned conventional mount has the following disadvantages.

First, the plastic cup must be manufactured separately, and by combining the respective components (lower insert, nozzle assembly, diaphragm, etc. of the main rubber) using the plastic cup, the structure is not only complicated, but also increases the number of parts and the assembly time There is a disadvantage that increases

Second, as another conventional method of assembling the plastic cup, as shown in FIG. 2, a plurality of clips 26 are integrally formed on the plastic cup 20 to the lower insert 13 vulcanized in the main rubber 12. Conversely, a method of fastening the clip 26 and a method of fastening the clip to the plastic cup by constructing a plurality of clips on the lower insert are used. There is a disadvantage that the number increase (eg, a total of 13 steps of assembly process) is inevitably caused.

Third, in the process of injecting a fluid (antifreeze) into the first fluid chamber, the volume of the fluid being initially sealed is insufficient, and even if it proceeds to the process of sealing the fluid in the vacuum chamber, the airtight effect is reduced and the air leaks into the fluid chamber. There are drawbacks.

The present invention has been devised to solve the conventional problems as described above, and improves the lower shape of the lower insert that is vulcanized integrally with the main rubber in the form of a locking structure, thereby improving the locking structure of the lower insert with a nozzle assembly and a diaphragm. By allowing the back to be fastened, it is possible to greatly reduce the number of mounting parts and the number of assembly processes, as well as simplify the mounting structure, and increase the initial sealing volume of the fluid (antifreeze) to maintain fluid tightness and exclude air from entering the fluid chamber. An object of the present invention is to provide a vehicle engine mount and a method for manufacturing the same.

In order to achieve the above object, an embodiment of the present invention includes: a main rubber; A core bush integrally vulcanized under the main rubber; Lower insert integrally vulcanized on the upper portion of the main rubber; A locking structure extending upwardly and integrally formed at an upper end of the lower insert; A nozzle assembly inserted and seated in an inner diameter portion of the locking structure; And a diaphragm that is inserted into the inner diameter portion of the locking structure while pressing the nozzle assembly and is locked with the locking structure. It provides a vehicle engine mount characterized in that it comprises a.

Preferably, the locking structure is characterized in that it is formed to extend a predetermined level higher than the upper height of the main rubber from the upper end of the lower insert to increase the filling volume of the fluid filled in the first fluid chamber of the main rubber.

In particular, it is characterized in that a plurality of locking holes forming equal intervals along the circumferential direction are formed at the upper end of the locking structure for locking engagement with the diaphragm.

In addition, a ring plate is integrally vulcanized on the rim portion of the diaphragm, and the ring plate is integrally formed with a plurality of locking protrusions that are inserted and fastened into the locking hole of the locking structure along the circumferential direction. .

In addition, the inner diameter of the lower insert and the locking structure is characterized in that the mounting jaw is formed on the edge of the nozzle assembly.

The engine mount of the present invention is characterized in that it further comprises a bracket that is crimped and bent against the inclined outer surface of the lower insert in a state that covers the main rubber and is disposed.

Another embodiment of the present invention for achieving the above object is: a first step having a lower insert having a locking structure formed with a plurality of locking holes are integrated; A second step of vulcanizing the core bush at the bottom of the main rubber and simultaneously vulcanizing the lower insert on the top of the main rubber; A third step in which a ring plate having a plurality of locking projections is integrally vulcanized and provided with a diaphragm; A fourth step of injecting fluid over the inner fluid space of the first fluid chamber and the locking structure of the main rubber; A fifth step of seating a nozzle assembly on an inner diameter portion of the locking structure; And a sixth step of seating the diaphragm on the nozzle assembly and pressing the rim portion of the diaphragm against the nozzle assembly while simultaneously locking the locking projection of the ring plate into the locking hole of the locking structure; It provides a method for manufacturing a vehicle engine mount comprising a.

In addition, after the sixth step, the seventh step of pressing and bending the upper end of the bracket against the inclined outer surface of the lower insert in a state in which the bracket is coverably arranged on the outer diameter portion of the main rubber further proceeds. It is characterized by being.

Preferably, the fourth to sixth steps are performed in a state in which a main rubber is pre-inserted inside the bracket, and then a seventh step of pressing and bending the upper end of the bracket against the inclined outer surface of the lower insert to lock it. It characterized in that the progress.

The present invention through the above-described problem solving means provides the following effects.

First, by improving the lower shape of the lower insert that is vulcanized integrally with the main rubber in the form of a locking structure, it is possible to eliminate the plastic cup parts previously provided as separate objects, thereby reducing the number of parts and reducing the cost.

Second, by ensuring that the nozzle assembly and the diaphragm are fastened to the locking structure integral with the lower insert, it is possible to improve assembly workability by greatly simplifying the mounting structure and significantly reducing the number of assembly processes.

Third, as the locking projection of the diaphragm is locked to the locking hole of the locking structure integral to the lower insert, the rim portion of the diaphragm is pressed against the nozzle assembly to be brought into close contact with the main rubber, thereby ensuring the confidentiality of the fluid chamber.

Fourth, the fluid (antifreeze) is also filled in the inner space of the diaphragm, thereby minimizing the volume of unfilled fluid as compared to the conventional one, thereby minimizing the possibility of air inflow into the fluid chamber.

1 and 2 are cross-sectional views showing a conventional engine mount structure,
3a to 3f are cross-sectional views showing an engine mount according to the present invention in the order of manufacturing process,
Figure 4 is a cross-sectional view showing an engine mount according to the invention,
5A and 5B are cross-sectional views showing another assembly example of the engine mount according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3A to 3F are sectional views showing the engine mount according to the present invention in the order of manufacturing process, and FIG. 4 is a sectional view showing the final assembled engine mount.

First, a first step having a lower insert 110 in which a locking structure 120 in which a plurality of locking holes 122 are formed is integrally formed, and a core bush 104 is vulcanized under the main rubber 100. At the same time, the second step of vulcanizing the lower insert 110 integrally on the upper part of the main rubber 100 is preceded (see FIG. 3A).

The upper part of the main rubber 100 is formed into a structure in which a concave first fluid chamber 106 in which a fluid is filled is formed, and when forming the main rubber 100, a core bush forming an internal skeleton of the main rubber at the bottom thereof At the same time that 104 is integrally vulcanized, a lower insert 110 having a locking structure 120 integrally formed thereon is vulcanized integrally.

At this time, the locking structure 120 is a part that is integrally formed when manufacturing the lower insert 110, the lower insert (in order to increase the filling volume of the fluid filled in the first fluid chamber 106 of the main rubber 100) It extends from the upper end of 110) by a predetermined level higher than the upper height of the main rubber 100.

In addition, a plurality of locking holes 122 forming equal intervals along the circumferential direction are formed through the upper end of the locking structure 120 for locking engagement with the diaphragm 140.

In addition, at the boundary between the lower insert 110 and the locking structure 120, a mounting jaw 124 on which the rim portion of the nozzle assembly 130 is seated is formed on the inner diameter.

At this time, the bolt 102 for coupling with the engine is fastened to the core bush 104 integrally vulcanized to the main rubber 100.

On the other hand, a diaphragm 140, which is a kind of rubber film for sealing the second fluid chamber 108 of the engine mount, is provided in a structure that can be fastened with the locking structure 120.

The diaphragm 140 is a rubber material, and the ring plate 142 having a plurality of locking projections 144 is integrally vulcanized when vulcanized (see FIG. 3B).

More specifically, the ring plate 142 having a circular ring shape and a hook-like locking projection 144 which forms an equal interval along the circumferential direction is integrally arranged with an insert placed on one side edge of a mold for forming the diaphragm 140 Then, by vulcanizing the diaphragm 140, the ring plate 142 having the locking projection 144 on the diaphragm 140 is integrally molded.

Accordingly, a ring plate 142 is integrally vulcanized on one edge of the diaphragm 140, and a plurality of locking projections are inserted into the ring plate 142 to be inserted into the locking hole 122 of the locking structure 120. (144) is equally spaced along the circumferential direction and is integrally formed.

Next, the lower insert 110 and the locking structure 120, the main rubber 100 is integrally mounted on the assembly jig, and then the fluid (antifreeze) in the first fluid chamber 106 of the main rubber 100 ) Is injected (see FIG. 3C).

At this time, the fluid is filled up to the inner diameter space of the locking structure 120, so that the fluid is only filled up to the position below the locking hole 122 of the locking structure 120 so as not to leak to the outside.

Subsequently, a step of seating the nozzle assembly 130 on an inner diameter portion of the locking structure 120 is performed (see FIG. 3C).

That is, by inserting the nozzle assembly 130 into the inner diameter portion of the locking structure 120, the rim end of the nozzle assembly 130 is formed on the inner diameter of the boundary between the lower insert 110 and the locking structure 120 ( 124).

Usually, the nozzle assembly (also referred to as an orifice portion 130) is formed with an internal flow path for fluid movement between the first fluid chamber 106 and the second fluid chamber 108, and is provided at the center of the nozzle assembly 130. A membrane separating the first fluid chamber 106 and the second fluid chamber 108 is mounted.

Accordingly, a portion of the fluid in which the first fluid chamber 106 is filled passes through the internal flow path of the nozzle assembly 130 and is in the second fluid chamber 108 (a space between the nozzle assembly and the diaphragm).

Next, after the diaphragm 140 provided as described above is seated on the nozzle assembly 130, the rim portion of the diaphragm 140 is pressed against the nozzle assembly 130 and the locking projections of the ring plate 142 are pressed. Assembly step 144 is inserted into the locking hole 122 of the locking structure 120 proceeds (see FIG. 3D).

In more detail, by pressing the rim portion of the diaphragm 140 using a jig for diaphragm assembly, the rim portion of the diaphragm 140 is tightly adhered to the nozzle assembly 130 and the ring plate 142 ) The locking projection 144 of the locking structure 120 is inserted into the locking hole 122 of the locking structure 120.

As such, as the locking projection 144 of the diaphragm 140 is locked to the locking hole 122 of the locking structure 120 integral with the lower insert 110, the rim portion of the diaphragm 140 has a nozzle assembly ( By pressing 130) to be in close contact with the main rubber 100, airtightness of the fluid chamber can be ensured.

In addition, by allowing the fluid (antifreeze) to be filled in the inner space of the diaphragm 140, the volume of unfilled fluid compared to the existing mount is minimized, thereby minimizing the possibility of air inflow into the fluid chamber.

Next, a step of assembling the bracket 150 for fixing the engine mount to the vehicle body of the engine room is performed (see FIGS. 3E and 3F).

First, after the bracket 150 is seated on the bracket fixing jig, the insulator assembly (main rubber, lower insert and locking structure, nozzle assembly, diaphragm) assembled as described above is pressed into the bracket using an insulator press jig. And placed (see Fig. 3e).

Accordingly, the outer diameter portion of the main rubber 100 is covered with the bracket 150.

In succession, by using a curling jig made of a beveled end, the upper end of the bracket 150 is pressed and bent, and the upper end of the bracket 150 is pressed and bent against the inclined outer surface of the lower insert 110 and locked. (See FIG. 3F), the engine mount of the present invention is assembled (see FIG. 4).

In this way, by improving the shape of one end of the lower insert 110 that is vulcanized to the main rubber 100 in the form of a locking structure 120, plastic cup parts previously provided as separate objects can be excluded, Accordingly, it is possible to reduce the number of parts and thereby reduce the cost, and also, by mounting the nozzle assembly 130 and the diaphragm 140 to the locking structure 120 integral with the lower insert 110, the engine mount While simplifying the structure, the number of assembly processes can be greatly reduced (previously reduced from 13 steps to 10 steps) to improve assembly workability.

On the other hand, the insulator assembly (main rubber, lower insert and locking structure, nozzle assembly, diaphragm) assembled as described above may be performed while being inserted and placed inside the bracket 150.

5A and 5B, the insulator assembly assembling process (fluid injection, nozzle assembly assembly, diaphragm assembly process) in a state in which the main rubber 100 and the like are inserted and arranged in the bracket 150 in advance. ) Can be performed in the same way.

In addition, by using a curling jig made of a beveled end, the upper end of the bracket 150 is crimped and bent, and the upper end of the bracket 150 is crimped and bent against the inclined outer surface of the lower insert 110 and locked. As a result, assembly is completed with the engine mount of the present invention (see FIG. 5B).

100: main rubber
102: bolt
104: core bush
106: 1st fluid room
108: second fluid room
110: Lower insert
120: locking structure
122: Locking Hall
124: cradle
130: nozzle assembly
140: diaphragm
142: ring plate
144: locking projection
150: bracket

Claims (9)

Main rubber;
A core bush integrally vulcanized under the main rubber;
Lower insert integrally vulcanized on the upper portion of the main rubber;
A locking structure extending upwardly and integrally formed at an upper end of the lower insert;
A nozzle assembly inserted and seated in an inner diameter portion of the locking structure; And
A diaphragm that is inserted into the inner diameter portion of the locking structure while pressing the nozzle assembly and is locked with the locking structure;
Automotive engine mount characterized in that it comprises a.
The method according to claim 1,
The locking structure is a vehicle engine mount characterized in that it is formed to extend a predetermined level higher than the upper height of the main rubber from the upper end of the lower insert to increase the filling volume of the fluid filled in the first fluid chamber of the main rubber.
The method according to claim 1,
An engine mount for a vehicle, characterized in that a plurality of locking holes forming equal intervals along the circumferential direction are formed at the upper end of the locking structure for locking engagement with the diaphragm.
The method according to claim 3,
A ring plate is integrally vulcanized on the rim portion of the diaphragm, and the ring plate is integrally formed with a plurality of locking projections formed at equal intervals along the circumferential direction to be inserted and fastened into the locking hole of the locking structure. Engine mount.
The method according to claim 1,
An engine mount for a vehicle, characterized in that a mounting jaw in which the rim portion of the nozzle assembly is seated is formed at the inner diameter of the boundary between the lower insert and the locking structure.
The method according to claim 1,
The engine mount for a vehicle, further comprising a bracket that is pressed and bent against an inclined outer surface of the lower insert in a state in which it is disposed while covering the main rubber.
A first step of having a lower insert in which a locking structure having a plurality of locking holes is formed;
A second step of vulcanizing the core bush at the bottom of the main rubber and simultaneously vulcanizing the lower insert on the top of the main rubber;
A third step in which a ring plate having a plurality of locking projections is integrally vulcanized and provided with a diaphragm;
A fourth step of injecting fluid over the inner fluid space of the first fluid chamber and the locking structure of the main rubber;
A fifth step of seating a nozzle assembly on an inner diameter portion of the locking structure; And
A sixth step of seating the diaphragm on the nozzle assembly and pressing the rim portion of the diaphragm against the nozzle assembly while simultaneously locking the locking projection of the ring plate into the locking hole of the locking structure;
Method for manufacturing a vehicle engine mount comprising a.
The method according to claim 7,
After the sixth step, the seventh step of pressing and bending the upper end of the bracket against the inclined outer surface of the lower insert in the state in which the bracket is coverably arranged on the outer diameter portion of the main rubber is further performed. A method for manufacturing an engine mount for a vehicle, characterized in that.
The method according to claim 7,
The fourth to sixth steps are performed in a state in which a main rubber is pre-inserted in the inside of the bracket, and then a seventh step of pressing and bending the upper end of the bracket against the inclined outer surface of the lower insert is performed. A method for manufacturing an engine mount for a vehicle, characterized in that.

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