CN209757078U - novel vacuum booster assembly with brake pump - Google Patents
novel vacuum booster assembly with brake pump Download PDFInfo
- Publication number
- CN209757078U CN209757078U CN201920144338.2U CN201920144338U CN209757078U CN 209757078 U CN209757078 U CN 209757078U CN 201920144338 U CN201920144338 U CN 201920144338U CN 209757078 U CN209757078 U CN 209757078U
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- piston
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Abstract
The utility model discloses a novel vacuum booster with brake pump assembly, a brake main cylinder passes through a front shell and extends into a front cavity, and is fixed with the front shell through a sealing structure, a first piston and a second piston in the brake main cylinder are respectively and hermetically installed in a cylinder body, one end of the first piston is connected with a push rod, the other end of the first piston is movably sleeved with a guide rod, one end of the guide rod, which is far away from the first piston, is fixedly connected with the second piston, and a first central valve and a second central valve are respectively arranged in inner cavities of the first piston and the second piston; the sealing structure comprises a sealing ring and a sealing ring mounting groove, the whole depth of the sealing ring mounting groove is smaller than the diameter of the sealing ring, the bottom of the sealing ring mounting groove is a fixing groove, the top of the sealing ring mounting groove is an expanding groove, the depth of the fixing groove is larger than the radius of the sealing ring, and the opening size of the fixing groove is smaller than the diameter of the sealing ring. The utility model discloses compact structure, safe and reliable, the leakproofness is good, and promotes the push rod, and the action is smooth and easy, does not have jamming or abnormal sound phenomenon.
Description
Technical Field
The utility model relates to a vacuum booster technical field, concretely relates to novel vacuum booster take brake pump assembly.
background
A novel vacuum booster with a brake pump assembly utilizes the principle that an engine sucks air when working to cause vacuum on one side of the booster, generates pressure difference relative to normal air pressure on the other side, and utilizes the pressure difference to strengthen braking thrust. A novel vacuum booster with a brake pump assembly is formed by connecting a vacuum booster and a brake master cylinder, a piston of the brake master cylinder is controlled by controlling the vacuum booster, a front shell assembly of the vacuum booster is in sealing connection with a cylinder body of the brake master cylinder, the existing production factory realizes sealing between the vacuum booster and the brake master cylinder by means of a front shell air seal, the sealing process has high requirements on the roughness of the surface of the cylinder body of the brake master cylinder and the toughness of the front shell air seal, and the processing difficulty is high; in addition, the push rod of the brake master cylinder is in a movable state during braking, the service life is long, the sealing performance between the front shell assembly of the vacuum booster and the cylinder body of the brake master cylinder is weakened, the phenomenon of vacuum leakage is easy to occur, and the braking effect of the vacuum booster is influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a novel vacuum booster assembly with a brake pump, which has compact structure, safety and reliability, good sealing performance, and no sealing ring pressure loss or falling off in the use process to influence the sealing effect; and the push rod is pushed, the action is smooth, and no clamping stagnation or abnormal sound phenomenon exists.
In order to achieve the above object, the utility model provides a following technical scheme: a novel vacuum booster with a brake pump assembly comprises a vacuum booster and a brake master cylinder connected with the vacuum booster through a sealing structure, wherein an oil cup is fixedly arranged on the brake master cylinder, the vacuum booster comprises a vacuum servo air chamber and a control valve assembly, the vacuum servo air chamber is formed by limiting a front shell and a rear shell, a diaphragm assembly used for dividing the vacuum servo air chamber into a front cavity and a rear cavity is arranged between the front shell and the rear shell, the diaphragm assembly moves along with a valve body of the control valve assembly integrally, a push rod with one end mounted on a piston of the brake master cylinder and the other end mounted on the control valve assembly is further arranged in the front cavity, and a reset spring is arranged between the valve body of the control valve assembly and the front shell;
The brake master cylinder penetrates through the front shell and extends into the front cavity, the brake master cylinder comprises a cylinder body, a first piston, a second piston, a first return spring, a second return spring, a first center valve and a second center valve, the first piston and the second piston are respectively and hermetically installed in the cylinder body, one end of the first piston is connected with the push rod, the other end of the first piston is movably sleeved with a guide rod, one end, far away from the first piston, of the guide rod is fixedly connected to the second piston, the first return spring is fixedly connected between the first piston and the second piston, the second return spring is fixedly connected between the second piston and the cylinder body, the first center valve and the second center valve are respectively arranged in inner cavities of the first piston and the second piston, one end of the first center valve and one end of the second center valve are movably abutted against a limit pin, and the limit pin is perpendicular to a piston hole and fixed on the side;
The sealing structure comprises a sealing ring and a sealing ring mounting groove, the whole depth of the sealing ring mounting groove is smaller than the diameter of the cross section of the sealing ring, the bottom of the sealing ring mounting groove is a fixing groove, the top of the sealing ring mounting groove is an expanding groove, the depth of the fixing groove is larger than the radius of the sealing ring, and the opening size of the fixing groove is smaller than the diameter of the sealing ring.
Furthermore, the sealing ring is an O-shaped sealing ring with high pressure resistance.
Further, the end of the piston cavity of the first piston is set to be a circular shoulder cavity, a circular cavity is fixedly arranged outside the circular shoulder cavity, the guide rod is movably sleeved in the circular cavity, and the end of the piston cavity of the second piston is set to be the circular shoulder cavity.
Further, center valve one and center valve two structures are the same, and equal movable mounting is in the circular bead cavity, center valve one comprises valve ejector pin, valve sealing washer and valve return spring, valve ejector pin movable mounting is in the piston intracavity, the tip at the valve ejector pin is connected to valve sealing washer interference fit, the other end activity top of valve ejector pin is established on the spacer pin, valve return spring is fixed to be set up on valve sealing washer and circular bead cavity wall.
Further, the outer surfaces of the first piston and the second piston are both sleeved with sealing rings.
Further, two oil supply ports are formed in the cylinder body, and sealing rings are arranged in the oil supply ports.
Compared with the prior art, the utility model, advantage and beneficial effect that have as follows:
1) the utility model discloses through seal structure fixed connection between procapsid and the cylinder body, seal structure includes sealing washer and sealing washer mounting groove, the whole degree of depth of sealing washer mounting groove is less than the diameter of sealing washer, when can be fine realization procapsid and cylinder body are close to sealedly, produce sufficient pressure of meeting to the sealing washer, make the sealing washer realize elastic deformation, sealing washer mounting groove bottom is the fixed slot, its top is the flaring groove, the degree of depth of fixed slot is greater than the radius of sealing washer, and the fixed opening size is less than the diameter of sealing washer, the fixed slot is used for fixing the sealing washer, prevent that the sealing washer from droing, influence; the flaring groove provides sufficient space for the elastic deformation of the sealing ring, realizes the sufficient deformation of the sealing ring, avoids pressure loss, and improves the sealing performance between the front shell and the cylinder body.
2) The utility model discloses the piston chamber tip of first piston sets up to the circular bead cavity, circular bead cavity external fixation is provided with circular cavity, the guide bar movable sleeve is established in circular cavity, the piston chamber tip of second piston sets up to the circular bead cavity, its center valve one is the same with two structures of center valve, equal movable mounting is in the circular bead cavity, the shape of valve seal circle is the echelonment with the circular bead cavity's shape is corresponding, when the valve seal circle contacts with the circular bead cavity, play good sealed effect, improve braking effect.
3) The utility model discloses first piston and second piston seal installation form two independent braking chambeies in the cylinder body, and carry out fixed connection through the guide bar between first piston and the second piston, the one end and the second piston fixed connection of guide bar, its other end movable sleeve is established in the tip cavity of first piston, there is the certain distance between push rod and the first center valve, and be provided with certain distance between first center valve and the second center valve, promote the in-process of push rod, the action is smooth and easy, no jamming phenomenon, braking effect is better.
Drawings
FIG. 1 is a cross-sectional view of a novel vacuum booster with brake pump assembly of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is an enlarged view of portion B of FIG. 1;
FIG. 4 is an enlarged view of section C of FIG. 1;
Fig. 5 is a left side view of the novel vacuum booster assembly with a brake pump according to the present invention.
In the figure: 100-vacuum booster, 200-brake master cylinder, 300-oil cup, 1-vacuum servo air chamber: 101-front housing, 102-rear housing, 103-diaphragm assembly, 104-push rod, 105-return spring, 2-control valve assembly, 3-cylinder, 4-first piston, 5-second piston, 6-first return spring, 7-second return spring, 8-center valve one, 9-center valve two, 10-guide rod, 11-limit pin, 12-seal ring, 13-seal ring mounting groove: 131-fixed groove, 132-flared groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, other embodiments obtained by a person of ordinary skill in the art without creative work all belong to the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a novel vacuum booster assembly with a brake pump, which includes a vacuum booster 100, and a brake master cylinder 200 connected to the vacuum booster 100 through a sealing structure, wherein an oil cup 300 is fixedly disposed on the brake master cylinder 200. The vacuum booster 100 comprises a vacuum servo air chamber 1 and a control valve assembly 2, wherein the vacuum servo air chamber 1 is defined by a front shell 101 and a rear shell 102, a diaphragm assembly 103 used for dividing the vacuum servo air chamber 1 into a front cavity and a rear cavity is arranged between the front shell 101 and the rear shell 102, the diaphragm assembly 103 integrally moves along with a valve body of the control valve assembly 2, the other end, far away from the diaphragm assembly 103, of the valve body of the control valve assembly 2 is connected with a brake pedal, a push rod 104 with one end mounted on a piston of a brake master cylinder 200 and the other end mounted on the control valve assembly 2 is further arranged in the front cavity, and a return spring 105 is arranged between the valve body of the control valve assembly 2 and the front shell 101, and the return spring controls;
The brake master cylinder 200 penetrates through the front housing 101 and extends into the front cavity, the brake master cylinder 200 comprises a cylinder body 3, a first piston 4, a second piston 5, a first return spring 6, a second return spring 7, a first central valve 8 and a second central valve 9, the first piston 4 and the second piston 5 are respectively and hermetically installed in the cylinder body 3, one end of the first piston 4 is connected with a push rod 104, the other end of the first piston 4 is movably sleeved with a guide rod 10, one end, far away from the first piston 4, of the guide rod 10 is fixedly connected onto the second piston 5, the first return spring 6 is fixedly connected between the first piston 4 and the second piston 5, the second return spring 7 is fixedly connected between the second piston 5 and the cylinder body 3, the first central valve 8 and the second central valve 9 are respectively arranged in inner cavities of the first piston 4 and the second piston 5, and one ends of the first piston 4 and the second piston 5 are movably supported on a limit pin 11, the limit pin 11 is vertical to the piston hole and fixed on the side wall of the cylinder body 3, and the side wall of the cylinder body 3 is provided with a limit hole for fixing the limit pin 11;
Referring to fig. 2, the sealing structure includes a sealing ring 12 and a sealing ring installation groove 13, the overall depth of the sealing ring installation groove 13 is smaller than the diameter of the sealing ring 12, so that when the front housing 101 and the cylinder 3 are close to each other for sealing, sufficient surface pressure is generated on the sealing ring 12 to enable the sealing ring 12 to elastically deform, the bottom of the sealing ring installation groove 13 is a fixing groove 131, the top of the sealing ring installation groove is an expanding groove 132, the depth of the fixing groove 131 is greater than the radius of the sealing ring 12, the opening size of the fixing groove 131 is smaller than the diameter of the sealing ring 12, and the fixing groove 131 is used for fixing the sealing ring; the flared groove 132 provides a sufficient space for the elastic deformation of the seal ring 12, realizes sufficient deformation of the seal ring, avoids pressure loss, and improves the sealing property between the front housing 101 and the cylinder block 3.
Specifically, the seal ring 12 is a high-pressure O-ring.
Specifically, the end of the piston cavity of the first piston 4 is set as a circular shoulder cavity, a circular cavity is fixedly arranged outside the circular shoulder cavity, the guide rod 10 is movably sleeved in the circular cavity, and the end of the piston cavity of the second piston 5 is set as the circular shoulder cavity. The first central valve 8 and the second central valve 9 are identical in structure and are movably mounted in the shoulder cavity, the first central valve 8 is composed of a valve ejector rod 81, a valve sealing ring 82 and a valve return spring 83, the valve ejector rod 81 is movably mounted in the piston cavity and moves in the piston cavity along with force, the valve sealing ring 82 is connected to the end portion of the valve ejector rod 81 in an interference fit mode, the valve sealing ring 82 is in a step shape and is in a good sealing effect when contacting with the shoulder cavity, the other end of the valve ejector rod 81 is movably supported on the limiting pin 11, the valve return spring 83 is fixedly arranged on the valve sealing ring 82 and the wall of the shoulder cavity, and when the valve return spring 83 drives the valve ejector rod 81 to reset, the valve ejector rod 81 moves to the right until the limiting pin 11 is touched.
in addition, the outer surfaces of the first piston 4 and the second piston 5 are respectively sleeved with a sealing ring, the first piston 4 and the second piston 5 are hermetically installed in the cylinder body 3 to form two independent brake cavities, the first piston 4 and the second piston 5 are fixed through the guide rod 10, one end of the guide rod 10 is fixedly connected with the second piston 5, the other end of the guide rod is movably sleeved in the end cavity of the first piston 4, a certain distance is reserved between the push rod 104 and the first central valve 8, and a certain distance is reserved between the first central valve 8 and the second central valve 9, so that in the process of pushing the push rod, the action is smooth, no clamping stagnation or abnormal sound phenomenon exists, and the brake effect is better. And two oil supply ports are formed in the cylinder body 3, and sealing rings are arranged in the oil supply ports, so that the sealing effect of the oil supply ports is improved, and the oil leakage of the oil supply ports is avoided to influence the braking effect of oil.
the utility model discloses a working process: referring to fig. 1, when a novel vacuum booster with brake pump assembly is in a non-braking state, the front chamber and the rear chamber are both vacuum, and the states of the first piston 4 and the second piston 5 in the master cylinder 200 and the states of the first center valve 8 and the second center valve 9 are shown in fig. 1. When braking, the control valve assembly 2 is pushed to move leftwards, the control valve assembly 2 pushes the push rod 104 to move leftwards, in the process that the control valve assembly 2 pushes the push rod 104 and drives the diaphragm assembly 103 to move leftwards, a pressure difference is generated between the front cavity and the rear cavity, the control valve assembly 2 is driven to compress the return spring 105, the push rod 104 is continuously pushed to move leftwards, the push rod 104 is in contact with the first piston 4 in the brake master cylinder 200 to push the first piston 4 to move leftwards in the inner cavity of the brake master cylinder 200, the first piston 4 pushes the second piston 5 to move leftwards to enter a braking state, the elastic force of the return spring is overcome, the brake cavity at the front end of the piston forms a sealed pressure cavity, the brake pressure in the brake cavity is increased to enter a front wheel brake cylinder and a rear wheel brake cylinder for deceleration or braking, at the moment, the valve ejector.
A first piston 4 and a second piston 5 of a brake master cylinder return under the action of a return spring, a novel vacuum booster with a brake pump assembly is in a non-braking state, a valve ejector rod is abutted on a limit pin, a central valve is opened, a valve sealing ring forms a gap with the inner wall of an inner cavity of a shoulder, a brake cavity is communicated with an oil supply cavity through a liquid inlet channel, and the pressures of the two cavities are balanced.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. the utility model provides a novel vacuum booster takes brake pump assembly, including vacuum booster (100), and with vacuum booster (100) passes through the brake master cylinder (200) that seal structure links to each other, the fixed oil cup (300) that is provided with on brake master cylinder (200), wherein, vacuum booster (100) include vacuum servo air chamber (1) and control valve subassembly (2), vacuum servo air chamber (1) is injectd by front casing (101) and back casing (102) and is formed, and be provided with between front casing (101) and back casing (102) and be used for with vacuum servo air chamber (1) divides into diaphragm assembly (103) of front chamber and back chamber, diaphragm assembly (103) along with the valve body of control valve subassembly (2) integrative removal, still be provided with in the front chamber one end and install on the piston of brake master cylinder (200) and push rod (104) on control valve subassembly (2) is installed to the other end, and a return spring (105) located between the valve body of the control valve assembly (2) and the front housing (101);
The method is characterized in that: the brake master cylinder (200) penetrates through the front shell (101) and extends into the front cavity, the brake master cylinder (200) comprises a cylinder body (3), a first piston (4), a second piston (5), a first return spring (6), a second return spring (7), a first central valve (8) and a second central valve (9), the first piston (4) and the second piston (5) are respectively installed in the cylinder body (3) in a sealing mode, one end of the first piston (4) is connected with the push rod (104), the other end of the first piston is movably sleeved with the guide rod (10), one end, far away from the first piston (4), of the guide rod (10) is fixedly connected onto the second piston (5), the first return spring (6) is fixedly connected between the first piston (4) and the second piston (5), and the second return spring (7) is fixedly connected between the second piston (5) and the cylinder body (3), the central valve I (8) and the central valve II (9) are respectively arranged in the inner cavities of the first piston (4) and the second piston (5), one ends of the central valve I and the central valve II are movably propped against a limiting pin (11), and the limiting pin (11) is vertical to a piston hole and fixed on the side wall of the cylinder body (3);
The sealing structure comprises a sealing ring (12) and a sealing ring mounting groove (13), the whole depth of the sealing ring mounting groove (13) is smaller than the diameter of the cross section of the sealing ring (12), the bottom of the sealing ring mounting groove (13) is a fixing groove (131), the top of the sealing ring mounting groove is a flaring groove (132), the depth of the fixing groove (131) is larger than the radius of the sealing ring (12), and the opening size of the fixing groove (131) is smaller than the diameter of the sealing ring (12).
2. The novel vacuum booster band brake pump assembly of claim 1 wherein: the sealing ring (12) is an O-shaped sealing ring with high pressure resistance.
3. The novel vacuum booster band brake pump assembly of claim 1 wherein: the piston cavity end part of the first piston (4) is set to be a circular shoulder cavity, a circular cavity is fixedly arranged outside the circular shoulder cavity, the guide rod (10) is movably sleeved in the circular cavity, and the piston cavity end part of the second piston (5) is set to be the circular shoulder cavity.
4. The novel vacuum booster band brake pump assembly of claim 2 wherein: center valve (8) and center valve two (9) structures are the same, and equal movable mounting is in the circular bead cavity, center valve (8) comprises valve ejector pin (81), valve sealing washer (82) and valve return spring (83), valve ejector pin (81) movable mounting is in the piston cavity, the tip at valve ejector pin (81) is connected in valve sealing washer (82) interference fit, the other end activity top of valve ejector pin (81) is established on spacer pin (11), valve return spring (83) are fixed to be set up on valve sealing washer (82) and circular bead cavity wall.
5. The novel vacuum booster band brake pump assembly of claim 1 wherein: and sealing rings are sleeved on the outer surfaces of the first piston (4) and the second piston (5).
6. The novel vacuum booster band brake pump assembly of claim 1 wherein: two oil supply ports are formed in the cylinder body (3), and sealing rings are arranged in the oil supply ports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920144338.2U CN209757078U (en) | 2019-01-28 | 2019-01-28 | novel vacuum booster assembly with brake pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920144338.2U CN209757078U (en) | 2019-01-28 | 2019-01-28 | novel vacuum booster assembly with brake pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209757078U true CN209757078U (en) | 2019-12-10 |
Family
ID=68750571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920144338.2U Expired - Fee Related CN209757078U (en) | 2019-01-28 | 2019-01-28 | novel vacuum booster assembly with brake pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209757078U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113753005A (en) * | 2021-11-09 | 2021-12-07 | 杭州赛奇机械股份有限公司 | Brake master cylinder for new energy vehicle |
-
2019
- 2019-01-28 CN CN201920144338.2U patent/CN209757078U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113753005A (en) * | 2021-11-09 | 2021-12-07 | 杭州赛奇机械股份有限公司 | Brake master cylinder for new energy vehicle |
| CN113753005B (en) * | 2021-11-09 | 2022-02-18 | 杭州赛奇机械股份有限公司 | Brake master cylinder for new energy vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191210 Termination date: 20210128 |