Vacuum pump assembly

Abstract

The invention discloses a vacuum pump assembly, which belongs to the technical field of vacuum and comprises a vacuum pump and a rotary air nozzle rotatably connected to an air inlet of the vacuum pump, and an included angle is formed between the air inlet direction of the rotary air nozzle and the rotating axis of the rotary air nozzle; the vacuum pump further comprises a silencer, the silencer is fixedly installed at an air outlet of the vacuum pump, an exhaust pipe is further installed at the exhaust end of the silencer, and the exhaust pipe is provided with a one-way exhaust structure. The vacuum pump is further provided with a shock pad. According to the vacuum pump assembly, the rotary air nozzle capable of freely rotating is installed at the air inlet of the vacuum pump assembly, so that the initial air inlet direction of the vacuum pump assembly can be changed by rotating the rotary air nozzle, and a vacuum pipe can be conveniently arranged between the vacuum pump assembly and the vacuum booster. Through the arrangement of the silencer and the one-way exhaust structure, the operation noise of the vacuum pump assembly can be effectively reduced, and external pollutants can be effectively prevented from entering the vacuum pump assembly. Through the arrangement of the shock pad, the vibration of the vacuum pump assembly during operation can be effectively reduced, and the comfort of a vehicle is improved.

Description

Technical Field

[0001] The present invention relates to the field of vacuum equipment, and particularly to a vacuum pump assembly. Background Art

[0002] In order to enhance the braking force in a hydraulic braking system, a vacuum booster is usually required. The vacuum booster is a very popular, reliable and low-cost solution. The vacuum booster requires negative pressure to work. The inner chamber of the vacuum booster is divided into at least one vacuum chamber and one working chamber. In many cases, the required negative pressure can be ensured by connecting the vacuum chamber to the intake manifold of a self-priming internal combustion engine. However, in the case of using a diesel engine, a turbocharged or electric drive device, and when the braking force demand increases due to, for example, a higher vehicle weight, the negative pressure provided by the vehicle drive device for suction is insufficient.

[0003] In order to reliably ensure an adequate supply of negative pressure, an independent vacuum pump assembly is required. The vacuum pump assembly sucks the remaining air from the vacuum chamber of the vacuum booster and discharges it to the atmosphere. The commonly available vacuum pump assemblies on the market are of three dry-running structures, namely piston type, vane type and diaphragm type.

[0004] In the field of vehicle industry, the space available for installing the vacuum pump assembly and the vacuum booster is usually relatively narrow, which may cause the vacuum tube connected between the vacuum pump assembly and the vacuum booster to be bent during installation, resulting in the blockage of the air path of the vacuum tube. In severe cases, it may be difficult or even impossible to install the vacuum tube.

[0005] In addition, in the automotive industry, even under extreme driving conditions, very high requirements are imposed on the vacuum pump assembly in terms of safety, long life, cost and noise emission. Especially for dry-running vacuum pump assemblies, their vibration and noise are relatively serious during operation, which not only affects the working life of the vacuum pump assembly, but also has an adverse impact on vehicle comfort.

[0006] In addition, the exhaust port of the existing vacuum pump assembly is directly connected to the atmosphere, so there is a possibility of water ingress and dust ingress, and protection is required to prevent the vacuum pump assembly from being contaminated, corroded or prematurely worn by foreign media. Summary of the Invention

[0007] Aiming at the problem that the vacuum pump assembly installed in a narrow space in the prior art is difficult to be connected to the vacuum booster, the purpose of the present invention is to provide a vacuum pump assembly to at least partially solve the above problems.

[0008] To achieve the above purpose, the technical solution of the present invention is as follows: A vacuum pump assembly includes a vacuum pump and a rotary air nozzle rotatably connected to the air inlet of the vacuum pump. Among them, there is an included angle between the air inlet direction of the rotary air nozzle and its rotation axis; the rotary air nozzle includes an air inlet pipe with one end closed and an air inlet nozzle connected to it. The open end of the air inlet pipe is rotatably connected to the air inlet of the vacuum pump with its center line as the axis, the air inlet nozzle is connected to the side wall of the air inlet pipe, and there is an included angle between the air inlet nozzle and the rotation axis of the rotary air nozzle.

[0009] In some preferred embodiments, the air inlet nozzle is perpendicular to the rotation axis of the rotary air nozzle.

[0010] In some preferred embodiments, an air inlet short pipe is formed at the air inlet of the vacuum pump. The air inlet pipe is inserted into the air inlet short pipe, and the air inlet pipe is detachably connected to the air inlet short pipe through a quick-release buckle.

[0011] In some preferred embodiments, the quick-release buckle includes an elastic member that is generally annular and has a notch. An annular slot for cooperating with the elastic member is provided on the circumferential outer wall of the inner one of the air inlet pipe and the air inlet short pipe, and an insertion opening for the elastic member to pass through is provided on the side wall of the outer one of the air inlet pipe and the air inlet short pipe.

[0012] In some preferred embodiments, the quick-release buckle further includes a fixing member connected to the elastic member. The fixing member is adapted to the insertion opening on the air inlet pipe, and when the elastic member is stuck in the annular slot, the fixing member fits with the insertion opening.

[0013] In some preferred embodiments, two quick-release buckles are arranged at circumferential intervals, and two corresponding insertion openings are provided on the side wall of the outer one of the air inlet pipe and the air inlet short pipe.

[0014] In some preferred embodiments, a silencer is further included. The silencer is fixedly installed at the air outlet of the vacuum pump, and an exhaust pipe is further installed at the exhaust end of the silencer. The exhaust pipe is configured with a one-way exhaust structure.

[0015] In some preferred embodiments, the exhaust pipe is a U-shaped pipe. One end of the U-shaped pipe is connected to the exhaust end of the silencer, and the other end is connected to a socket pipe fixed on the surface of the silencer. The one-way exhaust structure is fixedly installed in the socket pipe, and exhaust holes are provided on the side wall of the socket pipe.

[0016] In some preferred embodiments, the vacuum pump is further configured with a shock pad.

[0017] Adopting the above technical solution, the beneficial effects of the present invention are as follows: By installing a rotatable rotary nozzle at the air inlet of the vacuum pump assembly of the present invention, the initial air inlet direction can be changed by rotating the rotary nozzle, thereby facilitating the arrangement of the vacuum tube between the vacuum pump assembly and the vacuum booster. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the present invention.

[0019] Figure 2 It is a top view of the present invention.

[0020] Figure 3 It is a sectional view taken along line A-A in Figure 2 the figure.

[0021] Figure 4 It is an exploded schematic diagram of the rotary nozzle and the quick-release buckle in the present invention.

[0022] In the figure: 1 - vacuum pump, 11 - intake short pipe, 12 - sealing ring, 13 - rigid isolation ring, 14 - annular slot, 2 - rotary nozzle, 21 - intake pipe, 22 - intake nozzle, 23 - socket, 3 - quick-release buckle, 31 - elastic clamping member, 32 - fixing member, 4 - silencer, 41 - socket pipe, 42 - exhaust hole, 5 - exhaust pipe, 6 - one-way exhaust structure, 7 - shock pad. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following further describes the specific embodiments of the present invention with reference to the drawings. It should be noted here that the description of these embodiments is for helping to understand the present invention, but does not constitute a limitation to the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is the description of the structure of the present invention based on the drawings shown, and is only for the convenience of describing the present invention simply, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0025] For the "first" and "second" in the present technical solution, they are only the appellation distinctions for the same or similar structures, or the corresponding structures with similar functions, and do not represent the importance arrangement of these structures, nor do they have the meanings of sorting, or comparing sizes, or other meanings.

[0026] In addition, unless otherwise clearly specified and defined, the terms "installation" and "connection" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two structures. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the general idea of the present invention and in connection with the specific context of this solution.

[0027] The present invention provides Embodiment 1, a vacuum pump assembly, as Figures 1 - 4 shown, which includes a vacuum pump 1 and a rotating air nozzle 2.

[0028] The vacuum pump 1 has an air inlet for inhaling gas and an air outlet for discharging gas. The specific type of the vacuum pump 1 is not limited in this embodiment, and any type in the prior art can be used. Usually, it is a vacuum pump driven by a motor.

[0029] The rotating air nozzle 2 is connected to the air inlet of the vacuum pump 1 in a rotatable form, and there is an angle, such as 90°, between the air inlet direction of the rotating air nozzle 2 and its rotation axis. Of course, it can also be other angles. In this way, by rotating the rotating air nozzle 2, the initial air inlet direction can be changed. The initial air inlet direction refers to the orientation of the air inlet port of the rotating air nozzle 2, and further, the installation direction of the vacuum tube connected to the rotating air nozzle 2 can be changed, which is convenient for flexibly installing the vacuum tube in a limited space. The other end of the vacuum tube is used to connect to a device that works based on negative pressure, such as a vacuum booster for enhancing braking force in a hydraulic braking system.

[0030] The rotating air nozzle 2 specifically includes an air inlet pipe 21 and an air inlet nozzle 22.

[0031] The air inlet pipe 21 has a tubular structure with one end closed and the other end open. The open end of the air inlet pipe 21 is rotationally connected to the air inlet of the vacuum pump 1 with its own central axis as the axis. For the convenience of installation, usually, an air inlet short pipe 11 is formed at the air inlet of the vacuum pump 1, and the air inlet pipe 21 is coaxially sleeved outside the air inlet short pipe 11 in a clearance fit manner, and a sealing ring 12, such as an O-ring, is provided between the two to ensure airtightness while enabling the air inlet pipe 21 to rotate. To improve the sealing effect, two or more sealing rings 12 can be configured, and these sealing rings 12 can be arranged in the same sealing groove. Of course, adjacent two sealing rings 12 are usually arranged with a rigid isolation ring 13.

[0032] In addition, the air inlet pipe 21 is connected to the air inlet short pipe 11 through a quick-release buckle 3, which can not only ensure the stability of the connection between the air inlet pipe 21 and the air inlet short pipe 11 but also facilitate quick disassembly and assembly.

[0033] The quick-release buckle 3 specifically includes an elastic member 31 and a fixing member 32.

[0034] The elastic clamping member 31 is generally annular. An annular clamping groove 14 for cooperating with the elastic clamping member 31 is formed on the circumferential outer wall of the short intake pipe 11. The inner diameter of the elastic clamping member 31 is adapted to the diameter of the annular clamping groove 14. At the same time, the outer edge surface of the elastic clamping member 31 protrudes from the circumferential surface of the short intake pipe 11. A notch is formed on the elastic clamping member 31, and the size of the notch is smaller than the diameter of the short intake pipe 11 (specifically, the annular clamping groove 14). During use, the elastic clamping member 31 is clamped in the annular clamping groove 14 by elastic deformation.

[0035] An insertion port 23 is formed on the circumferential side wall of the intake pipe 21, so that the elastic clamping member 31 can be clamped on the short intake pipe 11 through the insertion port 23. The fixing member 32 is fixedly connected to the elastic clamping member 31. When the elastic clamping member 31 is clamped on the short intake pipe 11 through the insertion port 23, at least part of the fixing member 32 remains in the insertion port 23. Usually, the size and shape of the fixing member 32 are configured to just fit the insertion port 23. In this way, the intake pipe 21 cannot axially move, realizing the stable connection of the intake pipe 21. At the same time, there are no obvious depressions and protrusions on the circumferential side wall of the intake pipe 21, and the intake pipe 21 can rotate freely.

[0036] In this embodiment, both the short intake pipe 11 and the intake pipe 21 are configured in a stepped shape. The insertion port 23 and the annular clamping groove 14 are respectively arranged at the larger-diameter ends of the intake pipe 21 and the short intake pipe 11, and the sealing ring 12 is arranged at the smaller-diameter end of the short intake pipe 11.

[0037] It is easy to understand that the fixing member 32 is not necessary. It is only necessary to configure the elastic clamping member 31 into a special-shaped structure so that when it is clamped on the short intake pipe 11, the special-shaped protruding part thereon can remain in the insertion port 23.

[0038] Usually, two quick-release fasteners 3 are provided and circumferentially evenly distributed, that is, arranged at a circumferential interval of 180°. Specifically, the fixing members 32 in the two quick-release fasteners 3 are arranged opposite to each other and the fixing members 32 have a certain width dimension (axial length dimension). At the same time, the elastic clamping member 31 is configured to have a relatively small width dimension, and the two elastic clamping members 31 are axially staggered from each other. Such a setting enables the intake pipe 21 to be better stabilized during installation. Of course, more quick-release fasteners 3 can also be provided and circumferentially evenly distributed. It is only necessary to axially stagger the installation positions of the elastic clamping members 31 on the fixing member 32.

[0039] The use process of the vacuum pump assembly provided by the embodiment of the present invention is as follows: In use, the sealing ring 12 and the intake pipe 21 in the rotary air nozzle 2 are successively assembled on the short intake pipe 11 formed at the intake port of the vacuum pump 1. Then, the quick-insert buckle 3 (the elastic clamping member 31 therein) is snapped onto the annular slot 14 on the short intake pipe 11 through the socket 23 to complete the installation of the rotary air nozzle 2. Subsequently, the rotary air nozzle 2 can be rotated to turn the intake nozzle 22 thereon to a suitable direction so as to connect the vacuum tube to the equipment operating based on negative pressure. During disassembly, only by removing the quick-insert buckle 3 can the connection state between the rotary air nozzle 2 and the vacuum pump 1 be released, and the operation is quick and convenient.

[0040] The present invention also provides Embodiment 2, which is different from Embodiment 1 in that: in this embodiment, the intake pipe 21 is inserted into the short intake pipe 11, that is, the short intake pipe 11 has a larger size and the intake pipe 21 has a smaller size. Correspondingly, the annular slot is opened on the circumferential outer wall of the intake pipe 21, the socket is opened on the circumferential outer wall of the short intake pipe 11, and the sealing ring is arranged on the intake pipe 21.

[0041] The present invention also provides Embodiment 3. On the basis of the above embodiments, the vacuum pump assembly provided in this embodiment further includes a silencer 4. The silencer 4 is fixedly installed at the outlet of the vacuum pump 1, and the intake end of the silencer 4 is communicated with the outlet of the vacuum pump 1.

[0042] A exhaust pipe 5 is fixedly installed at the exhaust end of the silencer 4. The exhaust pipe 5 is configured with a one-way exhaust structure 6, specifically a one-way valve, such as an umbrella-shaped one-way valve, so that the exhaust pipe 5 can only exhaust outward, and external air, water, etc. cannot enter the silencer 4 through the exhaust pipe 5.

[0043] In this embodiment, the exhaust pipe 5 is a U-shaped pipe. One end of the U-shaped pipe is connected to the exhaust end of the silencer 4, and the other end of the U-shaped pipe is connected to the socket pipe 41 provided on the surface of the silencer 4. The one-way exhaust structure 6 is specifically fixedly installed in the socket pipe 41, and an exhaust hole 42 is opened on the side wall of the socket pipe 41 away from the exhaust pipe 5.

[0044] The present invention also provides Embodiment 4. The vacuum pump 1 is further configured with a shock pad 7, such as a columnar or similar structure made of an elastic material such as rubber, with a screw perforation opened at the center thereof. A plurality of threaded holes are opened on the bottom surface of the vacuum pump 1, such as at the four corners of the bottom surface. During installation, each threaded hole on the bottom surface of the vacuum pump 1 is fixed by a screw or a bolt, and the shock pad 7 is sleeved on the screw or the bolt, so that the vibration of the vacuum pump 1 during operation can be reduced through the shock pad 7.

[0045] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present invention, various changes, modifications, substitutions, and variations made to these embodiments still fall within the protection scope of the present invention.

Claims

1. A vacuum pump assembly, characterized in that: It includes a vacuum pump and a rotary air nozzle rotatably connected to the air inlet of the vacuum pump. Among them, there is an included angle between the air inlet direction of the rotary air nozzle and its rotation axis; the rotary air nozzle includes an air inlet pipe with a closed end and an air inlet nozzle connected to it. The open end of the air inlet pipe is rotatably connected to the air inlet of the vacuum pump with its center line as the axis, the air inlet nozzle is connected to the side wall of the air inlet pipe, and there is an included angle between the air inlet nozzle and the rotation axis of the rotary air nozzle.

2. The vacuum pump assembly according to claim 1, wherein: The air inlet nozzle is perpendicular to the rotation axis of the rotary air nozzle.

3. The vacuum pump assembly according to claim 1, wherein: An air inlet short pipe is formed at the air inlet of the vacuum pump. The air inlet pipe is inserted into and sleeved with the air inlet short pipe, and the air inlet pipe is detachably connected to the air inlet short pipe through a quick-release buckle.

4. The vacuum pump assembly according to claim 3, characterized in that: The quick-release buckle includes an elastic member that is generally annular and has a notch. An annular slot for cooperating with the elastic member is formed on the circumferential outer wall of the inner one of the air inlet pipe and the air inlet short pipe, and an insertion opening for the elastic member to pass through is formed on the side wall of the outer one of the air inlet pipe and the air inlet short pipe.

5. The vacuum pump assembly according to claim 4, wherein: The quick-release buckle further includes a fixing member connected to the elastic member. The fixing member is adapted to the insertion opening on the air inlet pipe, and when the elastic member is stuck in the annular slot, the fixing member fits with the insertion opening.

6. The vacuum pump assembly according to claim 4 or 5, characterized in that: There are two quick-release buckles arranged at circumferential intervals, and two corresponding insertion openings are formed on the side wall of the outer one of the air inlet pipe and the air inlet short pipe.

7. The vacuum pump assembly according to claim 1, wherein: It further includes a silencer. The silencer is fixedly installed at the air outlet of the vacuum pump, and an exhaust pipe is further installed at the exhaust end of the silencer. The exhaust pipe is configured with a one-way exhaust structure.

8. The vacuum pump assembly according to claim 7, wherein: The exhaust pipe is a U-shaped pipe. One end of the U-shaped pipe is connected to the exhaust end of the silencer, and the other end is connected to a socket pipe fixed on the surface of the silencer. The one-way exhaust structure is fixedly installed in the socket pipe, and exhaust holes are formed on the side wall of the socket pipe.

9. The vacuum pump assembly according to claim 1, wherein: The vacuum pump is further configured with a shock pad.

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