KR102672662B1 - Integrated Electric Brake Apparatus - Google Patents

Abstract

The integrated electric brake device according to the present embodiments is coupled to a motor in which a first hollow part that accommodates the motor shaft is formed, a housing in which the motor is coupled and a second hollow part in communication with the first hollow part is formed, and a motor shaft. A piston that reciprocates between the first hollow part and the second hollow part by the rotation of the motor shaft is provided in the second hollow part, and includes an insertion part inserted into the piston and a coupling part formed with a diameter larger than the insertion part and supported by the housing. It includes a cover member inside which a receiving space is formed to collect oil leaking between the piston and the insertion part, and is equipped with a double sealing member to prevent leaked oil from penetrating into the motor and causing a failure in the motor. However, by providing a receiving space where oil leaked from the primary sealing member is collected, safety can be ensured by delaying the application of hydraulic pressure to the secondary sealing member until the receiving space is full.

Description

Integrated Electric Brake Apparatus}

The present embodiments relate to an integrated electric brake device, and more specifically, to prevent leaked oil from penetrating into the motor and causing a failure in the motor, a double sealing member is provided, but the primary sealing member prevents leakage from occurring. It relates to an integrated electric brake device that can ensure safety by providing a receiving space where oil is collected and thereby delaying the application of hydraulic pressure to a secondary sealing member until the receiving space is full.

Vehicles are essentially equipped with a braking device, that is, a vehicle brake device. A vehicle brake device is a device that slows down or stops a running vehicle, and typically includes a vacuum brake that generates braking force using the suction pressure of the engine, and There are hydraulic brakes that use hydraulic pressure to generate braking force.

The vacuum brake is a device that can generate large braking force with small force by using the pressure difference between the engine's suction pressure and atmospheric pressure in the vacuum booster. It supplies the engine's suction pressure to the vacuum booster, which reduces fuel efficiency and provides vacuum even when stopping. There is a problem that the engine must be constantly driven for formation.

In addition, in the case of fuel cell vehicles and electric vehicles, it is impossible to install vacuum brakes because they do not have an engine, and in the case of hybrid vehicles, an idling stop function must be installed when stopping to improve fuel efficiency, so the introduction of hydraulic brakes is required.

An electronically controlled hydraulic brake system, one type of hydraulic brake, is a brake device that generates braking force by detecting when the driver steps on the pedal, and transmitting braking hydraulic pressure to the wheel cylinder of each wheel.

This hydraulic brake device moves the piston forward or backward by the rotation of the motor and generates hydraulic pressure in the oil. To prevent leaked oil from penetrating into the motor and causing a malfunction, a sealing member that withstands high pressure and seals between parts is provided.

In the conventional brake device, it was expected to improve sealing performance by providing double sealing members, but since the space between parts is very narrow, even if a slight oil leak occurs in the sealing member that primarily receives hydraulic pressure, the oil leakage between the sealing members occurs. As it becomes full, hydraulic pressure is immediately applied to the secondarily provided sealing member, so there is a problem in that the actual benefit of providing a double sealing member is not significant.

The present embodiments were developed in the background described above, and are provided with a double sealing member to prevent leaked oil from penetrating into the motor and causing a failure in the motor, but the leaked oil is collected from the primary sealing member. By providing an accommodation space, the purpose is to ensure safety by delaying the application of hydraulic pressure to the secondarily provided sealing member until the accommodation space is full.

The purpose of the present embodiments is not limited here, and other purposes not mentioned will be clearly understood by those skilled in the art from the description below.

According to the present embodiments, a motor in which a first hollow part that accommodates the motor shaft is formed, a housing in which the motor is coupled and a second hollow part in communication with the first hollow part is formed, and a housing that is coupled to the motor shaft and rotates the motor shaft. A piston that reciprocates between the first hollow part and the second hollow part, is provided in the second hollow part, and includes an insertion part inserted into the piston and a coupling part formed with a diameter larger than the insertion part and supported by the housing, and the piston and the insertion part. An integrated electric brake device may be provided including a cover member inside which a receiving space is formed to collect oil leaking between the parts.

According to the present embodiments, in order to prevent leaked oil from penetrating into the motor and causing a failure in the motor, a double sealing member is provided, but the primary sealing member is provided with a receiving space where leaked oil is collected. Safety can be ensured by delaying the application of hydraulic pressure to the secondary sealing member until the accommodation space is full.

1 is a cross-sectional view of an integrated electric brake device according to the present embodiments.
2 to 4 are cross-sectional views of a portion of FIG. 1.
Figure 5 is a perspective view of a portion of Figure 1.
Figure 6 is a cross-sectional view of the integrated electric brake device according to the present embodiments.
Figure 7 is a cross-sectional view of a portion of Figure 6.
Figure 8 is a perspective view of a portion of Figure 6.
Figure 9 is a cross-sectional view of a portion of Figure 6.

Hereinafter, some embodiments of the present embodiments will be described in detail through exemplary drawings. When adding reference numerals to components in each drawing, it should be noted that identical components are given the same reference numerals as much as possible even if they are shown in different drawings. Additionally, in describing the present embodiments, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present embodiments, the detailed description will be omitted.

Additionally, in describing the components of the present embodiments, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, or order of the component is not limited by the term. When a component is described as being “connected,” “coupled,” or “connected” to another component, that component may be directly connected or connected to that other component, but there is another component between each component. It will be understood that elements may be “connected,” “combined,” or “connected.”

FIG. 1 is a cross-sectional view of an integrated electric brake device according to the present embodiments, FIGS. 2 to 4 are a cross-sectional view of a portion of FIG. 1, FIG. 5 is a perspective view of a portion of FIG. 1, and FIG. 6 is a cross-sectional view of a portion of FIG. 1 according to the present embodiments. A cross-sectional view of the integrated electric brake device, FIG. 7 is a cross-sectional view of a portion of FIG. 6, FIG. 8 is a perspective view of a portion of FIG. 6, and FIG. 9 is a cross-sectional view of a portion of FIG. 6.

In the detailed description of the present embodiments, for convenience of explanation, unless otherwise specified, the left side in the drawing will be referred to as one side in the axial direction and the right side in the drawing will be referred to as the other axial side.

The integrated electric brake device 100 according to the present embodiments includes a motor 110 in which a first hollow part 112 in which the motor shaft 111 is accommodated is formed, the motor 110 is coupled, and the first hollow part A housing 120 in which a second hollow part 121 in communication with 112 is formed, is coupled to the motor shaft 111 and rotates the motor shaft 111 to form the first hollow part 112 and the second hollow part. A piston 130 that reciprocates between (121), is provided in the second hollow portion 121, and is formed with an insertion portion 141 inserted into the piston 130 and a diameter larger than the insertion portion 141, forming a housing 120. ) and includes a cover member 140 in which a receiving space 143 is formed to collect oil leaking between the piston 130 and the insertion portion 141.

Referring to FIG. 1 , the motor 110 is provided with a stator 115 and a rotor 114, and the motor shaft 111 rotates together with the rotor 114. The rotor 114 is coupled to the motor housing 116 and the frame member 113 via a bearing. The frame member 113 is provided to be spaced apart from the motor shaft 111, and the motor shaft is inside the motor 110. A first hollow portion 112 in which 111 is accommodated is formed.

The housing 120 is coupled to the motor 110 and has a second hollow portion 121 formed in communication with the first hollow portion 112, and the piston 130 is coupled to the motor shaft 111 to form a motor shaft ( It is provided to reciprocate between the first hollow part 112 and the second hollow part 121 by the rotation of 111).

The piston 130 is formed as a hollow body, and the motor shaft 111 and an insertion part 141, which will be described later, are inserted inside to face each other. Oil is provided between the insertion part 141 and the housing 120, so that the piston 130 is inserted into the piston 130. Hydraulic pressure is generated in the oil by the reciprocating motion of 130, and the hydraulic pressure is transmitted to the wheel cylinder (not shown) to brake the vehicle or transmitted to the brake pedal (not shown) to allow the driver to feel a sense of operation.

Screw grooves are formed on the outer peripheral surface of the motor shaft 111 and the inner peripheral surface of the piston 130, so that the motor shaft 111 and the piston 130 can be coupled via balls.

In addition, a guide member 131 is coupled to the piston 130. A guide groove is formed long in the axial direction on the inner peripheral surface of the frame member 113, and the guide member 131 has a guide protrusion inserted into the guide groove. It is provided so that even if the motor shaft 111 is rotated by engaging the guide groove and the guide protrusion, the piston 130 does not rotate and only reciprocates linearly in the axial direction by the screw groove and the ball.

Meanwhile, two spaced apart protrusions 132 protruding in the radial direction are formed on the piston 130 so that the hydraulic pressure of the oil is smoothly generated by the reciprocating movement of the piston 130, and a sealing member is provided between the protrusions 132. (133) is provided and seals the space between the outer peripheral surface of the piston 130 and the housing 120 so that the hydraulic pressure of the oil can be smoothly generated.

That is, the sealing member 133 moves together with the piston 130 and seals the space between the piston 130 and the housing 120, so that hydraulic pressure is smoothly generated by the reciprocating movement of the piston 130.

Additionally, in order to minimize damage to the sealing member 133 due to friction and deformation occurring during reciprocating motion, ring members 134 may be provided on both sides of the sealing member 133, respectively.

That is, between the protrusions 132, not only the sealing member 133 but also the ring member 134 is provided on both sides of the sealing member 133, so that the durability of the sealing member 133 is maintained during the reciprocating movement of the piston 130. can be secured.

Referring to FIG. 2, the cover member 140 is provided in the second hollow portion 121 and is formed with an insertion portion 141 inserted into the piston 130 and a diameter larger than the insertion portion 141, forming the housing 120. ) includes a coupling portion 142 supported on the.

As shown in the drawing, the second hollow part 121 may be formed to be open on both axial sides in the housing 120, and the motor shaft 111 is inserted into the second hollow part 121 from one side and the motor ( 110) may be coupled to the housing 120, and the cover member 140 may be inserted into the second hollow portion 121 from the other side and coupled to the housing 120.

The cover member 140 includes an insertion portion 141 and a coupling portion 142. The insertion portion 141 is inserted into the piston 130 and the piston 130 is supported on the outer peripheral surface of the insertion portion 141. It reciprocates in the axial direction by the motor shaft 111, and the coupling portion 142 closes the second hollow portion 121 and is coupled to the housing 120 to prevent oil leakage and the cover member 140. becomes fixed.

The housing 120 has an enlarged inner diameter and a step portion 201 is formed, and one axial side of the coupling portion 142 may be supported on the step portion 201. As shown in the figure, the second hollow portion ( The other side of 121 is enlarged, a step portion 201 is formed in the housing 120, and the cover member 140 is inserted into the second hollow portion 121 from the other side, and the coupling portion 142 is connected to the step portion 201. It will be supported.

In addition, a coupling member 146 supported on the other axial side of the coupling portion 142 may be coupled to the housing 120, that is, one side of the coupling portion 142 is supported on the step portion 201 and the other side of the coupling portion 142 is supported on the housing 120. The cover member 140 is coupled to the housing 120 by supporting the side surface of the coupling member 146.

This coupling member 146 may be inserted into the coupling groove 202 formed on the inner peripheral surface of the housing 120, and a configuration such as a snap ring may be used as the coupling member 146.

Additionally, a first sealing portion 122 may be provided between the housing 120 and the coupling portion 142.

As described above, since oil pressurized by the piston 130 is provided between the insertion part 141 and the housing 120, the oil may leak or be lost between the coupling part 142 and the housing 120. As will be described later, when an electronic control device (not shown) that senses the rotation of the motor 110 is coupled to the housing 120, a first seal is installed to prevent malfunction of the electronic control device due to leaked oil. A unit 122 is provided.

This first sealing part 122 can be inserted into the inner peripheral groove 203 formed on the inner peripheral surface of the housing 120. Looking at the assembly sequence of the cover member 140, etc., first the first sealing portion is placed in the inner peripheral groove 203. The portion 122 is inserted, the insertion portion 141 is inserted into the piston 130, the cover member 140 is inserted into the second hollow portion 121, and the coupling portion 142 is inserted into the step portion 201. After being supported, the coupling member 146 is inserted into the coupling groove 202 and the cover member 140 may be coupled to the housing 120.

Although not shown in the drawing, the first sealing portion 122 may be provided to be inserted into a circumferential groove formed on the outer peripheral surface of the coupling portion 142.

Additionally, in order to prevent oil from leaking from the outside of the piston 130 and penetrating into the motor 110, sealing members 124a and 124b may be provided between the piston 130 and the housing 120. The sealing members 124a and 124b are provided to be spaced apart in the axial direction and can double seal the second hollow portion 121.

Referring to FIG. 3, the inner peripheral surface of the housing 120 is provided with two grooves 301 spaced apart in the axial direction, and sealing members 124a and 124b are provided in each groove 301. The groove 301 A discharge passage 123 is formed between them to discharge leaked oil to the outside.

That is, when hydraulic pressure is generated in the oil by the piston 130, the sealing members 124a and 124b, which are primarily provided, withstand high pressure and prevent oil leakage. If the discharge passage 123 is not provided, the piston 130 and Since the space between the housings 120 is very narrow, even if a slight oil leak occurs in the primary sealing member 124a, hydraulic pressure is applied to the secondary sealing member 124b, increasing the possibility of oil leakage. Therefore, there is a high risk that leaked oil will penetrate into the motor 110 and cause a breakdown.

However, the discharge passage 123 is provided so that leaked oil is discharged to the outside from the primary sealing member 124a, so that hydraulic pressure is not transmitted to the secondary sealing member 124b due to the leaked oil. , Therefore, the motor 110 can be protected.

Meanwhile, a receiving space 143 is formed inside the cover member 140 to collect oil leaking between the piston 130 and the insertion portion 141.

In order to prevent oil from leaking from the inside of the piston 130 and penetrating into the motor 110, a second sealing member 145a may be provided in duplicate as will be described later, similar to the discharge passage 123. Due to oil slightly leaking from the primary sealing member, hydraulic pressure is applied to the secondary sealing member, increasing the possibility of oil leakage and preventing the motor 110 from malfunctioning due to leaked oil. , a receiving space 143 is provided in which oil leaking from the primarily provided sealing member is collected.

This receiving space 143 is a communication passage 144a that communicates between the piston 130 and the insertion portion 141, and a space connected to the communication passage 144a to store the oil collected in the communication passage 144a. Includes portion 144b.

That is, the communication passage 144a is formed at the portion where the insertion portion 141 is inserted into the piston 130 and is open in the radial direction, and as will be described later, the sealing member is installed on one side and the other axial direction of the communication passage 144a. It is provided so that oil leaking from the primarily provided sealing member is collected into the communication passage 144a.

Therefore, oil leaking from the primary sealing member is collected in the receiving space 143 and does not remain between the insertion part 141 and the piston 130, so hydraulic pressure is not applied to the secondary sealing member. This ensures the safety of the motor 110.

Since the amount of leaked oil is extremely small, unlike the discharge passage 123 that discharges the leaked oil to the outside, it will take a very long time for the receiving space 143 to store the leaked oil to be full, and therefore, secondary It is possible to prevent hydraulic pressure from being applied to the provided sealing member.

In addition, two or more communication passages 144a may be formed so that leaked oil can be smoothly collected into the receiving space 143. As shown in the drawing, the communication passages 144a are located at the upper and lower sides of the cover member 140, respectively. It may be formed to be open.

Meanwhile, as described above, a double sealing member is provided to prevent oil from leaking from the inside of the piston 130. In the embodiments in which the second and third sealing members 145a and 145b are provided, and in the fourth embodiment And we will look at embodiments provided with fifth sealing members 145a and 145b.

First, referring to FIGS. 4 and 5, a second sealing member 145a and a third sealing member 145b may be provided between the piston 130 and the insertion portion 141. The second sealing member (145a) primarily withstands the hydraulic pressure and prevents oil from leaking, and the third sealing member (145b) secondarily prevents leaked oil from penetrating into the motor 110.

Circumferential grooves 401 are formed on the outer peripheral surface of the insertion portion 141 on one side and the other side in the axial direction of the communication passage 144a, and the second sealing member 145a and the third sealing member 145b are formed in the circumferential groove 401. ) are inserted respectively.

That is, the insertion portion 141 is provided with circumferential grooves 401 on both sides of the communication passage 144a, and the second sealing member 145a and the third sealing member 145b are inserted into the circumferential groove 401. The cover member 140 may be inserted into the piston 130.

Therefore, when oil leakage occurs in the second sealing member 145a, the leaked oil is collected in the space 144b through the communication passage 144a between the piston 130 and the insertion part 141, so that the third Application of hydraulic pressure to the sealing member 145b is suspended and the motor 110 can be protected.

Additionally, the space portion 144b is formed to be open in the axial direction, and a stopper member 147 that opens and closes the space portion 144b may be coupled to the cover member 140.

As shown in the drawing, the space 144b may be formed to be open to the other side in the axial direction, and the stopper member 147 closes the space 144b and is coupled to the cover member 140.

That is, the oil collected in the space 144b can be easily removed by separating the stopper member 147 from the cover member 140 without the need to separate the cover member 140 from the housing 120, and the oil collected in the space 144b can be easily removed from the receiving space. It is possible to prevent hydraulic pressure from being applied to the third sealing member (145b) when (143) is filled with oil.

This stopper member 147 may be coupled to the cover member 140 by screwing or press fitting.

Next, the housing 120 may be equipped with an electronic control device (not shown) to sense the rotation of the motor shaft 111. The electronic control device is coupled to the other side of the housing 120 to control the motor shaft 111. It can be provided to sense the rotation of the sensing magnet 613 coupled to.

Referring to FIGS. 6 to 8 , the motor shaft 111 is provided with a sensor shaft 611 that penetrates the cover member 140 and protrudes to the other side.

That is, a depression 601 that is depressed in the axial direction is formed on the motor shaft 111, and one end of the sensor shaft 611 is inserted into the depression 601 and the other end is inserted into the other side of the cover member 140. It protrudes, and a sensing magnet bush 612 and a sensing magnet 613 are provided on the other end of the sensor shaft 611 and rotate together with the motor shaft 111.

The electronic control device is equipped with a sensor facing the sensing magnet 613, so that the rotation direction and speed of the motor shaft 111 can be recognized by sensing the rotation of the sensing magnet 613.

Meanwhile, the space 144b may be provided with a bush member 614 that is supported on the inner peripheral surface of the cover member 140 and supports the rotation of the sensor shaft 611. The bush member 614 is located in the space 144b. It is provided on the other side of the sensor shaft 611, and one end of the sensor shaft 611 may be supported by the motor shaft 111 and the other end may be supported by the bush member 614.

Subsequently, a sleeve 620 may be provided to separate the receiving space 143 from the sensor shaft 611.

That is, since the sensor shaft 611 is provided to penetrate the cover member 140, it is necessary to prevent the oil collected in the receiving space 143 from leaking between the sensor shaft 611 and the cover member 140. Considering the ease of manufacturing the cover member 140, it is desirable to provide a separate sleeve 620.

The sleeve 620 is hollow, into which the sensor shaft 611 is inserted, and includes a large diameter portion 711 supported on the inner peripheral surface of the piston 130 and a small diameter portion 712 inserted into the cover member 140.

That is, the small diameter portion 712 is inserted into the interior of the cover member 140 on one side in the axial direction, the sleeve 620 is coupled to the cover member 140, and the large diameter portion 711 is inserted into the cover member 140 in the axial direction. is supported by

Accordingly, the inner diameter of the cover member 140 is formed to be larger than the outer diameter of the small diameter portion 712, and the space portion 144b may be formed between the inner peripheral surface of the cover member 140 and the outer peripheral surface of the small diameter portion 712, The portion 144b is sealed by a sixth sealing member 622, which will be described later.

At this time, a fourth sealing member 615 may be provided between the piston 130 and the insertion portion 141, and a fifth sealing member 621 may be provided between the large diameter portion 711 and the piston 130. The fourth sealing member 615 primarily withstands hydraulic pressure and prevents oil from leaking, and the fifth sealing member 621 secondarily prevents leaking oil from penetrating into the motor 110.

In the insertion part 141, a circumferential groove 701 is formed on the other axial side of the communication passage 144a into which the fourth sealing member 615 is inserted, and the large diameter part 711 has an outer peripheral surface with a reduced diameter and a fifth sealing member ( A seating portion 713 provided with 621) is formed.

The large diameter portion 711 is gradually reduced in diameter to form a seating portion 713 spaced apart from the inner peripheral surface of the piston 130, and the fifth sealing member 621 is connected to the piston 130 and the large diameter portion in the seating portion 713. It is provided to seal between (711).

That is, a fourth sealing member 615 and a fifth sealing member 621 are provided on both sides of the communication passage 144a, respectively. The sleeve 620 is inserted into the sensor shaft 611 and the large diameter portion 711 is A cover member 140 is supported on the inner peripheral surface of the piston 130, has a fifth sealing member 621 on the seating portion 713, and has a fourth sealing member 615 inserted into the circumferential groove 701. It is inserted into the small diameter portion 712 and may be combined with the sleeve 620.

Therefore, when oil leakage occurs in the fourth sealing member 615, the leaked oil is collected in the space portion 144b through the communication passage 144a between the piston 130 and the insertion portion 141. Application of hydraulic pressure to the sealing member 621 is suspended and the motor 110 can be protected.

As described above, the space 144b is sealed by the sixth sealing member 622, which is provided between the sleeve 620 and the cover member 140.

The sixth sealing member 622 prevents oil collected in the space 144b from leaking and penetrating into the motor or electronic control device.

In addition, in order to support the sixth sealing member 622 in the axial direction, a support member 721 supported on the other side of the sixth sealing member 622 is provided between the sleeve 620 and the cover member 140. It can be.

That is, the support member 721 is formed in a ring shape and is supported on the outer peripheral surface of the small diameter portion 712 and the inner peripheral surface of the cover member 140. In order to fix the support member 721 in the axial direction, the engaging portion 901 ) and an insertion member 722 may be provided.

The cover member 140 has an enlarged inner peripheral surface and a locking portion 901 is formed, and the support member 721 is inserted into the small diameter portion 712 and one side is supported by the locking portion 901.

In addition, the insertion member 722 supported on the other side of the support member 721 is coupled to the small diameter portion 712, so that the support member 721 is fixed between the locking portion 901 and the insertion member 722. It will happen.

This insertion member 722 can be inserted into the insertion groove 902 formed on the outer peripheral surface of the small diameter portion 712, and a configuration such as a snap ring may be used as the insertion member 722.

According to the integrated electric brake device having this shape, a double sealing member is provided to prevent leaked oil from penetrating into the motor and causing a failure in the motor, but the leaked oil is collected from the primary sealing member. By providing an accommodating space, safety can be ensured by delaying the application of hydraulic pressure to the secondary sealing member.

In the above, just because all the components constituting the embodiments of the present embodiments have been described as being combined or operated in combination, the present embodiments are not necessarily limited to these embodiments. That is, within the scope of the purpose of the present embodiments, all of the components may be operated by selectively combining one or more of them.

In addition, terms such as “include,” “comprise,” or “have” as used above mean that the corresponding component may be included, unless specifically stated to the contrary, and thus do not exclude other components. Rather, it should be interpreted as being able to include other components. All terms, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present embodiments belong, unless otherwise defined. Commonly used terms, such as terms defined in a dictionary, should be interpreted as consistent with the contextual meaning of the related technology and, unless clearly defined in the present embodiments, should not be interpreted in an idealized or overly formal sense.

The above description is merely an illustrative description of the technical idea of the present embodiments, and various modifications and variations can be made by those skilled in the art in the technical field to which the present embodiments belong without departing from the essential characteristics of the present embodiments. will be. Accordingly, the embodiments disclosed in the present embodiments are not intended to limit the technical idea of the present embodiments but are for explanation, and the scope of the technical idea of the present embodiments is not limited by these embodiments. The scope of protection of the present embodiments should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of rights of the present embodiments.

100: Integrated electric brake device 110: Motor
112: First hollow section 120: Housing
121: second hollow part 122: first sealing member
123: discharge passage 130: piston
140: Cover member 141: Insertion part
142: coupling portion 143: receiving space
144a: Flue passage 144b: Space part
145a: second sealing member 145b: third sealing member
147: Stopper member 401: Circumferential groove
611: Sensor axis 613: Sensing magnet
614: Bush member 615: Fourth sealing member
620: Sleeve 621: Fifth sealing member
622: 6th sealing member 701: Circumferential groove
711: Large diaphragm 712: Small diaphragm
713: Seating part 721: Support member
722: Insertion member

Claims (21)

A motor in which a first hollow portion in which the motor shaft is accommodated is formed;
a housing to which the motor is coupled and in which a second hollow part communicating with the first hollow part is formed;
A piston coupled to the motor shaft and reciprocating between the first hollow portion and the second hollow portion by rotation of the motor shaft;
It is provided in the second hollow part and includes an insertion part inserted into the piston and a coupling part formed with a diameter larger than the insertion part and supported by the housing, and a receiving space in which oil leaking between the piston and the insertion part is collected. A cover member formed inside;
Includes,
The receiving space is an integrated electric brake device characterized in that it includes a communication passage communicating between the piston and the insertion portion, and a space portion connected to the communication passage to store oil collected in the communication passage. According to claim 1,
An integrated electric brake device, characterized in that the inner diameter of the housing is enlarged and a step is formed, and one axial side of the coupling portion is supported by the step. According to claim 2,
An integrated electric brake device, characterized in that a coupling member supported on the other axial side of the coupling part is coupled to the housing. According to claim 3,
The integrated electric brake device is characterized in that the coupling member is inserted into a coupling groove formed on the inner peripheral surface of the housing. According to claim 1,
An integrated electric brake device, characterized in that a first sealing member is provided between the housing and the coupling portion. According to claim 5,
The integrated electric brake device is characterized in that the first sealing member is inserted into an inner peripheral groove formed on the inner peripheral surface of the housing. delete According to claim 1,
An integrated electric brake device, characterized in that two or more communication passages are formed. According to claim 1,
An integrated electric brake device, characterized in that a second sealing member and a third sealing member are provided between the piston and the insertion portion. According to clause 9,
An integrated electric brake device, characterized in that circumferential grooves are formed on one side and the other side of the axial direction of the communication passage on the outer peripheral surface of the insertion portion, and the second sealing member and the third sealing member are respectively inserted into the circumferential grooves. According to clause 9,
An integrated electric brake device, wherein the space portion is formed to be open in an axial direction, and a stopper member that opens and closes the space portion is coupled to the cover member. According to claim 1,
An integrated electric brake device, characterized in that the motor shaft is provided with a sensor shaft that penetrates the cover member and protrudes to the other side. According to claim 12,
An integrated electric brake device, characterized in that the space portion is provided with a bush member that is supported on the inner peripheral surface of the cover member and supports rotation of the sensor shaft. According to claim 12,
An integrated electric brake device comprising a sleeve into which the sensor shaft is inserted, wherein the sleeve includes a large diameter portion supported on the inner peripheral surface of the piston and a small diameter portion inserted into the cover member. According to claim 14,
An integrated electric brake device, characterized in that a fourth sealing member is provided between the piston and the insertion portion, and a fifth sealing member is provided between the large diameter portion and the piston. According to claim 15,
A circumferential groove into which the fourth sealing member is inserted is formed on the other side of the axial direction of the communication passage in the insertion part, and the large diameter part has an outer peripheral surface of a reduced diameter and a seating part in which the fifth sealing member is provided is formed. Integrated electric brake device. According to claim 14,
An integrated electric brake device, characterized in that a sixth sealing member is provided between the small diameter portion and the cover member. According to claim 17,
An integrated electric brake device, characterized in that a support member supported on the other side of the sixth seal member is provided between the small diameter portion and the cover member. According to claim 18,
An integrated electric brake device, characterized in that the inner peripheral surface of the cover member is enlarged and a locking portion is formed, and one side of the support member is supported by the locking portion. According to claim 19,
An integrated electric brake device, characterized in that an insertion member supported on the other side of the support member is coupled to the small diameter portion. According to claim 20,
The integrated electric brake device is characterized in that the insertion member is inserted into an insertion groove formed on the outer peripheral surface of the small diameter portion.

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