Environmentally friendly and energy-saving electric vehicle vacuum pump

Abstract

The present invention relates to an automobile brake system accessory, and in particular to an environmentally friendly and energy-saving electric vehicle vacuum pump. The technical solution is: an environmentally friendly and energy-saving electric vehicle vacuum pump, including a motor and a pump housing with an installation opening, the installation opening is respectively provided with a cover, a cylinder sleeve and a piston leather cup, the piston leather cup is connected to the motor, an air inlet hole for external air to enter is provided on the end surface of the cylinder sleeve facing the cover, an air inlet check valve is provided at the air inlet hole, an exhaust mounting seat is provided on the piston leather cup, a first exhaust check valve is provided on the exhaust mounting seat, the space between the two piston leather cups of the pump housing is an exhaust chamber, the exhaust hole on the exhaust mounting seat is connected to the exhaust chamber through the piston leather cup, an exhaust channel connected to the outside is provided on the inner wall of the exhaust chamber, and a second exhaust check valve is provided at the exhaust channel. The above technical solution provides an energy-saving, high-efficiency, long-life, and noise-reducing environmentally friendly and energy-saving electric vehicle vacuum pump.

Description

Technical Field

[0001] The invention relates to an automobile brake system accessory, in particular to an environmentally friendly and energy-saving vacuum pump for an electric vehicle. Background Art

[0002] The electric vacuum pump is the vacuum source for the automobile vacuum hydraulic brake and power steering system. It mainly consists of a motor, a pump casing mounted on the motor, and installation openings at both longitudinal ends of the pump casing. A one-way valve and a cylinder sleeve and a piston cup that is linked to the motor and can move back and forth in the cylinder sleeve are respectively provided at the two installation openings. The piston cup is connected to the motor shaft of the motor through a connecting rod and a crankshaft.

[0003] The traditional one-way valve includes a mounting body that can close the mounting opening, an intake channel for air to enter the mounting body, and an exhaust channel for exhausting the air in the pump housing. The intake channel is provided with an intake one-way valve plate, and the exhaust channel is provided with an exhaust one-way valve plate. The piston cup is driven by a motor and moves back and forth in the cylinder sleeve to achieve intake and exhaust. The intake and exhaust area between the piston cup and the one-way valve is small. The load size of the motor during operation mainly depends on the exhaust resistance of the air. The instantaneous air density is the largest when the motor is powered on and started. This is a constant factor. At the same time, affected by the exhaust resistance, the starting current and load of the motor will also increase, which not only consumes energy but also reduces the driving force.

[0004] Moreover, the conventional exhaust check valve and intake check valve are umbrella-shaped sheets, each of which is provided with a limit rod connected to the mounting body. Not only is the processing process more complicated, but also, during use, the limit rod and the umbrella-shaped sheet are easily broken and separated due to the influence of air pressure, which easily leads to the failure of the check valve.

[0005] The intake check valve and the exhaust check valve are repeatedly opened and closed during use, and the opening and closing range between the umbrella-shaped valve body and the mounting body is large, so the noise generated during use is uncontrollable. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides an environmentally friendly and energy-saving electric vehicle vacuum pump which is energy-saving, highly efficient, has a long service life and reduces noise.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an environmentally friendly and energy-saving electric vehicle vacuum pump, comprising a motor, a pump casing mounted on the motor, and installation openings are respectively provided at both longitudinal ends of the pump casing, and a sealing cover, a cylinder sleeve and a piston leather cup which is linked with the motor and can reciprocate in the cylinder sleeve are respectively provided at the two installation openings, and the piston leather cup is connected to the motor shaft of the motor through a crankshaft, characterized in that: an air inlet for external air to enter is provided on the end surface of the cylinder sleeve facing the sealing cover, and an air inlet check valve is provided at the air inlet hole, an exhaust mounting seat with an exhaust hole is provided on the piston leather cup, and a first exhaust check valve is provided on the exhaust mounting seat, and the space between the two piston leather cups of the pump casing is an exhaust chamber, the exhaust hole on the exhaust mounting seat is connected to the exhaust chamber through the piston leather cup, an exhaust channel connected to the outside is provided on the inner wall of the exhaust chamber, and a second exhaust check valve is provided at the exhaust channel.

[0008] With the above technical solution, when the motor starts, the piston cup is displaced in the cylinder sleeve through the crankshaft linkage. At this time, the air outside or in the gas tank is extracted, and the air pressure impacts the intake check valve, prompting the air to enter between the cylinder cover and the piston cup through the inlet hole on the cylinder cover. When the piston cup moves toward the cylinder cover, the air between the cylinder cover and the piston cup impacts the first exhaust check valve. At this time, the air pressure in the pump body is greater than the external air pressure, and the air enters the exhaust cavity through the exhaust hole and is discharged from the exhaust channel through the second exhaust check valve. In the above process, the space between the cylinder sleeve and the piston cup forms an exhaust buffer cavity, and the exhaust first passes through the inside of the pump housing and then is discharged from the exhaust cavity, which prolongs the initial exhaust time. Since the exhaust resistance is the largest when the motor starts, and the exhaust time set above forms a time difference with the motor starting moment, the load at the motor starting moment becomes smaller, the starting current is reduced, and the prerequisite for the motor speed increase is created, which is not only energy-saving, but also more efficient.

[0009] The present invention is further configured as follows: an air intake passage which is communicated with the air intake holes of the cylinder sleeves at both longitudinal ends of the pump housing is provided in the pump housing, and an air inlet which enables the air intake passage to communicate with the outside is provided on the pump housing.

[0010] By adopting the above technical solution, the air intake at both longitudinal ends of the pump casing is conducted through an air intake channel integrated on the pump casing, which can reduce the setting of external pipelines. It is not only beautiful, but also reduces the sealing points and ensures the sealing performance.

[0011] The present invention is further configured as follows: the intake check valve is a sheet-like flat gasket, the intake check valve is connected to the cylinder head through a clamping block, the intake check valve has a supporting part and a deforming part, the deforming part is arranged corresponding to the intake hole of the cylinder liner, and the end of the clamping block facing the intake check valve is provided with a supporting protrusion for pressing the supporting part.

[0012] By adopting the above technical solution, the intake check valve is set as a sheet-like flat gasket, and is fitted with the cylinder head through a clamping block, thereby avoiding breakage during use and extending the service life; and the support protrusion on the clamping block interferes with the support part of the intake check valve, which can reduce the deformation area of ​​the intake check valve, thereby reducing the noise caused by the collision of the intake check valve with the cylinder head when opening or closing.

[0013] The present invention is further configured as follows: the piston leather cup includes a piston mounting seat and a leather cup sleeved on the circumferential surface of the piston mounting seat, the exhaust mounting seat and the piston mounting seat are connected to the crankshaft through fasteners, the first exhaust check valve is pressed between the exhaust mounting seat and the piston mounting seat, the first exhaust check valve includes a sheet-like flat gasket body, the middle part of the sheet-like flat gasket body has a protrusion extending outward, the piston mounting seat is provided with an extension portion adapted to and pressed against the protrusion, and the piston mounting seat is provided with a hole that causes the exhaust hole on the exhaust mounting seat to communicate with the exhaust chamber.

[0014] By adopting the above technical solution, the first exhaust check valve is set as a sheet-like flat pad body, and is pressed between the exhaust mounting seat and the piston mounting seat. On the one hand, it is not easy to be damaged during use. On the other hand, the protrusion on it contacts the extension part on the piston mounting seat, thereby reducing the deformation amplitude of the first exhaust check valve and reducing the noise generated during exhaust.

[0015] The present invention is further configured as follows: an anti-medium ingress conduit is provided at the other end of the exhaust channel relative to the end communicating with the inside of the pump casing, the anti-medium ingress conduit is vertically arranged to the pump casing, and the other end of the anti-medium ingress conduit relative to the end connected to the exhaust channel is a curved portion bent toward the pump casing.

[0016] By adopting the above technical solution, since the vacuum pump is installed on the chassis of the automobile, the provision of the medium-proof conduit can prevent external media from entering the exhaust passage.

[0017] The present invention is further configured as follows: the two crankshafts of the two piston cups respectively include a crankshaft body vertically connected to the motor shaft and a driving body arranged parallel to the crankshaft body, the driving body and the crankshaft body are connected by an inclined connecting rod, and the two crankshafts are stacked on the motor shaft.

[0018] By adopting the above technical solution, the above arrangement causes the lateral space of the stacked crankshafts to be reduced, and the lateral space of the pump housing to be reduced, thereby reducing the overall lateral space, making it easier to install the whole on the vehicle.

[0019] The present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the present invention;

[0021] Figure 2 for Figure 1 AA cross-sectional diagram of ;

[0022] Figure 3 for Figure 2 An enlarged schematic diagram of part I;

[0023] Figure 4 for Figure 2 An enlarged schematic diagram of Part II;

[0024] Figure 5 for Figure 2 BB cross-sectional view;

[0025] Figure 6 for Figure 2 Schematic diagram of CC cross section. DETAILED DESCRIPTION

[0026] like Figure 1 — Figure 6The environmentally friendly and energy-saving electric vehicle vacuum pump shown in the figure comprises a motor 1, a pump housing 2 mounted on the motor 1, and mounting openings 21 are respectively provided at both longitudinal ends of the pump housing 2. The two mounting openings 21 are respectively provided with a sealing cover 3, a cylinder sleeve 4, and a piston leather cup 5 which is linked with the motor 1 and can be reciprocated in the cylinder sleeve 4. The piston leather cup 5 is connected to the motor shaft 11 of the motor 1 through a crankshaft 6. The sealing cover 3 is connected to the pump housing 2 through a fastener 21. An air inlet 41 for external air to enter is provided on the end surface of the cylinder sleeve 4 facing the cover 3, and an air inlet check valve 7 is provided at the air inlet hole 41. An exhaust mounting seat 8 with an exhaust hole 81 is provided on the piston leather cup 5, and a first exhaust check valve 82 is provided on the exhaust mounting seat 8. The space between the two piston leather cups 5 of the pump housing 2 is an exhaust chamber 22. The exhaust hole 81 on the exhaust mounting seat 8 is connected to the exhaust chamber 22 through the piston leather cup 5. An exhaust channel 221 connected to the outside is provided on the inner wall of the exhaust chamber 22, and a second exhaust check valve 23 is provided at the exhaust channel 221. When the motor 1 is started, the piston cup 5 is displaced in the cylinder sleeve 4 through the crankshaft 6. At this time, the air outside or in the gas tank is extracted, and the air pressure impacts the intake check valve 7, prompting the air to enter between the cylinder head 4 and the piston cup 5 from the inlet hole 41 on the cylinder head 4. When the piston cup 5 moves toward the cylinder head 4, the air between the cylinder head 4 and the piston cup 5 impacts the first exhaust check valve 82. At this time, the air pressure in the pump body is greater than the external air pressure. The air enters the exhaust chamber 22 from the exhaust hole 81 and is discharged from the exhaust channel 221 through the second exhaust check valve 23. In the above process, the space between the cylinder sleeve 4 and the piston cup 5 forms an exhaust buffer chamber. The exhaust first passes through the inside of the pump housing 2 and then is discharged from the exhaust chamber 22, which prolongs the initial exhaust time. Since the exhaust resistance is the largest when the motor 1 is started, the exhaust time set above forms a time difference with the motor 1 starting moment, which prompts the load of the motor 1 to be reduced at the moment of starting, and the starting current is reduced, creating a prerequisite for the speed increase of the motor 1, which is not only energy-saving, but also more efficient.

[0027] In the embodiment of the present invention, in order to reduce the noise generated during use, the intake check valve 7 is a sheet-like flat gasket, the intake check valve 7 is connected to the cylinder head 4 through the clamping block 42, the intake check valve 7 has a support portion 71 and a deformation portion 72, the deformation portion 72 is arranged corresponding to the intake hole 41 of the cylinder sleeve 4, and the end of the clamping block 42 facing the intake check valve 7 is provided with a support protrusion 421 for pressing the support portion 71. The intake check valve 7 is set as a sheet-like flat gasket, and is fitted with the cylinder head 4 through the clamping block 42, so that the intake check valve 7 is prevented from breaking during use, and has a long service life; and the support protrusion 421 on the clamping block 42 is in conflict with the support portion 72 of the intake check valve 7, which can reduce the deformation area of ​​the intake check valve 7, thereby reducing the noise generated by the collision of the intake check valve 7 with the cylinder head 4 when opening or closing.

[0028] The piston leather cup 5 in the embodiment of the present invention includes a piston mounting seat 51 and a leather cup 52 sleeved on the circumferential surface of the piston mounting seat 51, the exhaust mounting seat 8 and the piston mounting seat 51 are connected to the crankshaft 6 through a fastener 21, the first exhaust check valve 82 is pressed between the exhaust mounting seat 8 and the piston mounting seat 51, the first exhaust check valve 82 includes a sheet-like flat gasket body 821, the middle part of the sheet-like flat gasket body 821 has a protrusion 822 extending outward, the piston mounting seat 51 is provided with an extension portion 511 adapted to and pressed against the protrusion 822, and the piston mounting seat 51 is provided with a hole 512 for connecting the exhaust hole 81 on the exhaust mounting seat 8 with the exhaust chamber 22. The first exhaust check valve 82 is configured as a sheet-like flat pad and is pressed between the exhaust mounting seat 8 and the piston mounting seat 51. On the one hand, it is not easy to be damaged during use. On the other hand, the protrusion 822 thereon contacts with the extension portion 511 on the piston mounting seat 51, thereby reducing the deformation amplitude of the first exhaust check valve 82 and reducing the noise generated during exhaust.

[0029] In the embodiment of the present invention, in order to reduce the number of external pipelines, reduce the number of sealing points, and ensure the sealing of the pump body, an air intake channel 24 is provided in the pump housing 2, which is connected to the air intake holes 41 of the cylinder sleeve 4 at both ends of the pump housing 2 in the longitudinal direction, and an air intake port 241 is provided on the pump housing 2 to facilitate the air intake channel 24 to communicate with the outside. There is a space between the cover 3 and the cylinder sleeve 4, and the air intake channel 24 is connected to the air intake hole 41 on the cylinder sleeve 4 through the space.

[0030] Since the vacuum pump is installed on the chassis of a car, in order to prevent external media from entering the exhaust channel 221 and entering the pump body through the exhaust channel 221, an anti-medium inlet conduit 9 is provided at the other end of the exhaust channel 221 relative to the end communicating with the pump housing 2. The anti-medium inlet conduit 9 is vertically arranged to the pump housing 2, and the other end of the anti-medium inlet conduit 9 relative to the end connected to the exhaust channel 221 is a curved portion 91 bent toward the pump housing 2.

[0031] In order to reduce the overall volume, the two crankshafts 6 of the two piston cups 5 respectively include a crankshaft body 61 vertically connected to the shaft of the motor 1 and a driving body 62 arranged parallel to the crankshaft body 61. The driving body 62 is connected to the crankshaft body 61 through an inclined connecting rod 63, and the two crankshafts 61 are stacked on the motor shaft 11.

Claims

1. An environmentally friendly and energy-saving electric vehicle vacuum pump, comprising a motor, a pump housing mounted on the motor, and mounting openings at both longitudinal ends of the pump housing, a sealing cover, a cylinder sleeve, and a piston cup linked with the motor and capable of reciprocating in the cylinder sleeve, respectively, and the piston cup is connected to the motor shaft of the motor through a crankshaft, characterized in that: The end surface of the cylinder sleeve facing the sealing cover is provided with an inlet hole for external air to enter, and an inlet check valve is arranged at the inlet hole, and an exhaust mounting seat with an exhaust hole is provided on the piston leather cup, and a first exhaust check valve is provided on the exhaust mounting seat. The space between the two piston leather cups of the pump casing is an exhaust chamber, and the exhaust hole on the exhaust mounting seat is connected with the exhaust chamber through the piston leather cup, and an exhaust channel connected with the outside is provided on the inner wall of the exhaust chamber, and a second exhaust check valve is arranged at the exhaust channel. Inlet channels which are respectively connected with the inlet holes of the cylinder sleeves at its longitudinal ends are provided in the pump casing, and an air inlet port which facilitates the connection between the inlet channel and the outside is provided on the pump casing. The inlet check valve is a sheet-like flat gasket, and the inlet check valve is connected to the cylinder cover through a clamping block. The inlet check valve has a supporting part and a deforming part, and the deforming part is arranged corresponding to the inlet hole of the cylinder sleeve, and the clamping block faces the A supporting protrusion for pressing the supporting part is provided at one end of the intake one-way valve, the piston leather cup includes a piston mounting seat and a leather cup sleeved on the circumferential surface of the piston mounting seat, the exhaust mounting seat and the piston mounting seat are connected to the crankshaft through fasteners, the first exhaust one-way valve is pressed between the exhaust mounting seat and the piston mounting seat, the first exhaust one-way valve includes a sheet-like flat pad body, the middle part of the sheet-like flat pad body has a protrusion extending outward, the piston mounting seat is provided with an extension portion that adapts to and presses against the protrusion, the piston mounting seat is provided with a hole that enables the exhaust hole on the exhaust mounting seat to communicate with the exhaust chamber, the exhaust channel is provided with a medium-proof conduit at the other end relative to the end communicating with the pump housing, the medium-proof conduit is vertically arranged to the pump housing, and the medium-proof conduit is a bent portion bent toward the pump housing at the other end relative to the end connected to the exhaust channel.

2. The environmentally friendly and energy-saving electric vehicle vacuum pump according to claim 1 is characterized in that: The piston leather cup includes a piston mounting seat and a leather cup sleeved on the circumferential surface of the piston mounting seat. The exhaust mounting seat and the piston mounting seat are connected to the crankshaft through fasteners. The first exhaust one-way valve is pressed between the exhaust mounting seat and the piston mounting seat. The first exhaust one-way valve includes a sheet-like flat gasket body. The middle part of the sheet-like flat gasket body has a protrusion extending outward. The piston mounting seat is provided with an extension portion that adapts to and presses against the protrusion. The piston mounting seat is provided with a hole that enables the exhaust hole on the exhaust mounting seat to communicate with the exhaust chamber.

3. The environmentally friendly and energy-saving electric vehicle vacuum pump according to claim 1 is characterized in that: The two crankshafts of the two piston leather cups respectively include a crankshaft body vertically connected to the motor shaft and a driving body arranged parallel to the crankshaft body. The driving body and the crankshaft body are connected through an inclined connecting rod, and the two crankshafts are stacked on the motor shaft.

Images