Vacuum pump with multiple air inlet nozzles

Abstract

The utility model discloses a multi-air-inlet-nozzle vacuum pump which comprises a support, a pump body located at the front end of the support, an oil tank and a motor located at the rear end of the support. The motor adopts a direct-current brushless motor; the motor is covered with a protective cover, the protective cover is fixedly connected with the support, and a control box, an air inlet frame and an electromagnetic valve are arranged in the protective cover; wherein the control box is located at the rear end of the motor; the air inlet frame is located on one side of the motor, fixed to the support and communicated to an inner cavity of the pump body through the support, a plurality of air inlet nozzles are sequentially arranged on the air inlet frame in the front-back direction, and the air inlet nozzles penetrate out of the protective cover. The electromagnetic valve is located above the motor, connected with the air inlet frame and used for connecting or disconnecting an air path between the air inlet nozzle and the support. The upper end face of the protective cover is further provided with a vacuum meter installation opening and a vacuum meter is correspondingly embedded in the vacuum meter installation opening and connected with the air inlet frame through a pipeline. According to the structure, the arrangement number of the air inlet nozzles can be increased, effective covering protection is carried out, and falling damage is avoided.

Description

Technical Field

[0001] This utility model relates to the field of vacuum pump technology, and in particular to a multi-inlet vacuum pump. Background Technology

[0002] To meet the different usage scenarios of different users, vacuum pumps are generally required to be equipped with solenoid valves. The solenoid valves act in one direction to prevent pump oil from flowing back into the pumped container. At the same time, more than three sizes of connectors are required. Common sizes include 1 / 4SAE, 3 / 8SAE, and 1 / 2SAE, while less common sizes include 5 / 16SAE and 1 / 2ACME. Some users even require vacuum gauges to be installed on the vacuum pump.

[0003] Figure 1 and Figure 2 The diagram shows a conventional vacuum pump structure, including a bracket 1a, a pump body located at the front end of the bracket 1a, an oil tank 2a, and a motor 3a located at the rear end of the bracket 1a. In the above structure, the solenoid valve 4a is arranged on the upper part of the bracket 1a near the handle. Figure 1 The aluminum block 5a of the solenoid valve allows for the installation of three inlet nozzles 6a. Figure 2 Two air inlets 6a with connectors and a vacuum gauge 7a are installed on the aluminum block 5a of the solenoid valve. The air inlets 6a are all arranged on the upper part of the bracket 1a, near the oil tank 2a. Since a collector or oil mist filter is installed above the oil tank 2a, it is inconvenient to arrange too many air inlets 6a. In addition, the arrangement of the air inlets 6a must follow the principle of not extending beyond the outside of the vacuum pump, otherwise the air inlets 6a may be easily damaged if they fall, rendering the vacuum pump unusable. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the above-mentioned problems and provide a multi-inlet vacuum pump that increases the number of inlet nozzles and provides effective protection to prevent damage from falling.

[0005] The technical solution of this utility model is:

[0006] This utility model discloses a multi-inlet vacuum pump, comprising a bracket, a pump body located at the front end of the bracket, an oil tank, and a motor located at the rear end of the bracket. The motor is a brushless DC motor; the motor is covered by a protective cover fixedly connected to the bracket, and the protective cover contains a control box, an air inlet frame, and a solenoid valve; the control box is located at the rear end of the motor; the air inlet frame is located on one side of the motor, fixed to the bracket, and connected to the pump body cavity through the bracket; multiple air inlets are sequentially arranged on the air inlet frame along the front-rear direction, and the air inlets extend beyond the protective cover; the solenoid valve is located above the motor and connected to the air inlet frame, used to connect or disconnect the air passage between the air inlets and the bracket; the upper surface of the protective cover also has a vacuum gauge mounting port with a corresponding vacuum gauge embedded therein, and the vacuum gauge is connected to the air inlet frame through a pipeline.

[0007] In the above structure, a DC brushless motor with a small outer diameter is used, and the air inlet, solenoid valve and vacuum gauge are all arranged on the side near the motor. The positions of each component are reasonably optimized and protected by a protective cover. This not only achieves a compact and small structure and allows for the placement of as many air inlets as possible, but also reduces the risk of damage from drops.

[0008] Furthermore, in the multi-inlet vacuum pump of this utility model, the inlet frame includes an inlet section and a delivery section that are connected. The inlet section extends horizontally in the front-to-back direction, and the inlet nozzles are arranged sequentially on the inlet section. The inlet section is also provided with a vacuum gauge interface and is correspondingly connected to a vacuum gauge. The solenoid valve is connected at the junction of the inlet section and the delivery section, and the plug of the solenoid valve is in cooperation with the outlet of the inlet section to seal it. The outlet of the delivery section is fixedly connected to the bracket. The horizontally extending design of the inlet section facilitates the layout of the inlet nozzles, increases the number of inlet nozzles, and results in a compact and small structure.

[0009] Furthermore, in the multi-inlet vacuum pump of this utility model, the central axis of the gas delivery section and the central axis of the gas inlet section form an inclined angle.

[0010] Furthermore, in the multi-inlet vacuum pump described in this utility model, the inlet section and the delivery section are integrally formed, which simplifies the processing.

[0011] Furthermore, in the multi-inlet vacuum pump described in this utility model, the protective cover has an inwardly recessed cavity, and the air inlet is disposed within the cavity and does not protrude outside the cavity. This structure, by concealing the air inlet within the cavity, ensures that it does not extend beyond the outer edge of the protective cover, thus providing effective protection against drop damage.

[0012] Furthermore, in the multi-inlet vacuum pump of this utility model, a handle is provided on the protective cover in front of the vacuum gauge, and the upper surface of the vacuum gauge is lower than the upper surface of the handle, effectively protecting the vacuum gauge.

[0013] Furthermore, in the multi-inlet vacuum pump described in this utility model, the protective cover includes two half-covers joined together, and the two half-covers are fixedly connected by bolts. The above-mentioned protective cover structure is easy to disassemble and maintain.

[0014] Furthermore, in the multi-inlet vacuum pump described in this utility model, there are at least three inlets.

[0015] The beneficial effects of this utility model are:

[0016] This utility model has a simple structure and reasonable design. By combining a small-diameter DC brushless motor with a protective cover, and by rationally designing the layout of the air intake frame, control box, air intake nozzle, vacuum gauge, solenoid valve, etc., the air intake nozzles are arranged horizontally in sequence along the front and back direction, thereby increasing the number of air intake nozzles and effectively protecting each component to prevent damage from falls. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a vacuum pump in the prior art.

[0018] Figure 2 This is a schematic diagram of another vacuum pump in the prior art.

[0019] Figure 3 This is a schematic diagram of the structure of this utility model.

[0020] Figure 4 This is a schematic diagram of the structure of this utility model after one half of the cover has been removed. Detailed Implementation

[0021] The present invention will now be further described with reference to the accompanying drawings:

[0022] Reference Figure 3 and Figure 4 As shown in the figure, the multi-inlet vacuum pump described in this embodiment includes a bracket 1, a pump body located at the front end of the bracket 1, an oil tank 2, and a motor 3 located at the rear end of the bracket 1. The motor 3 is a DC brushless motor; the motor 3 is covered with a protective cover 9, and the protective cover 9 is fixedly connected to the bracket 1. The protective cover 9 includes two half-covers joined together, and the two half-covers are fixedly connected by bolts.

[0023] The protective cover 9 houses a control box 11, an air intake frame 5, and a solenoid valve 4. The control box 11 is located at the rear end of the motor 3. The air intake frame 5 is located on one side of the motor 3, fixed to a bracket 1, and connected to the pump body cavity via the bracket 1. Multiple air intake nozzles 6 are sequentially arranged along the front-to-back direction on the air intake frame 5, extending beyond the protective cover 9. In this embodiment, there are at least three air intake nozzles 6. The solenoid valve 4 is located above the motor 3 and connected to the air intake frame 5, used to connect or disconnect the air passage between the air intake nozzles 6 and the bracket 1. The upper surface of the protective cover 9 also has a vacuum gauge mounting port, with a corresponding vacuum gauge 7 embedded therein. The vacuum gauge 7 is connected to the air intake frame 5 via a pipe 8.

[0024] Specifically, the air intake frame 5 includes an air intake section 501 and an air delivery section 502 that are connected to each other, and the air intake section 501 and the air delivery section 502 are integrally formed. The air intake section 501 extends horizontally in the front-to-back direction and the air intake nozzles 6 are arranged sequentially on the air intake section 501. The air intake section 501 is also provided with a vacuum gauge interface and is correspondingly connected to a vacuum gauge 7. The solenoid valve 4 is connected at the junction of the air intake section 501 and the air delivery section 502, and the plug of the solenoid valve 4 is in a sealing fit with the outlet of the air intake section 501. The central axis of the air delivery section 502 forms an inclined angle with the central axis of the air intake section 501, and the outlet of the air delivery section 502 is fixedly connected to the bracket 1.

[0025] To ensure proper protection for the air inlet 6 and vacuum gauge 7, the protective cover 9 in this embodiment has an inwardly recessed cavity 901, within which the air inlet 6 is positioned and does not protrude. A handle 10 is provided on the protective cover 9 in front of the vacuum gauge 7, with the upper surface of the vacuum gauge 7 lower than the upper surface of the handle 10. In this embodiment, the air inlet 6 is inclined upwards relative to the horizontal plane.

[0026] In the above structure, since a DC brushless motor is used, its outer diameter is relatively small. The air inlet 6, solenoid valve 4, and vacuum gauge 7 can all be arranged close to the motor side. By reasonably arranging the positional relationship of the control box 11, air inlet 6, solenoid valve 4, and vacuum gauge 7, and designing a unique air intake frame 5 structure, the air inlet 6 is arranged in a horizontal sequence along the front and rear direction. This can maximize the number of air inlets 6, and the protective cover 9 can effectively protect each component and effectively avoid collision damage.

[0027] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model are still covered by the claims of this utility model.

Claims

1. A multi-inlet vacuum pump, comprising a bracket, a pump body located at the front end of the bracket, an oil tank, and a motor located at the rear end of the bracket, characterized in that: The motor is a DC brushless motor; the motor housing is equipped with a protective cover and the protective cover is fixedly connected to the bracket. The protective cover contains a control box, an air intake frame, and a solenoid valve; the control box is located at the rear end of the motor; the air intake frame is located on one side of the motor, fixed to the bracket and connected to the pump body cavity through the bracket, and multiple air intake nozzles are arranged sequentially along the front-to-back direction on the air intake frame, the air intake nozzles extending outside the protective cover; the solenoid valve is located above the motor and connected to the air intake frame, used to connect or disconnect the air passage between the air intake nozzles and the bracket; the upper end face of the protective cover also has a vacuum gauge mounting port and a corresponding vacuum gauge is embedded therein, the vacuum gauge is connected to the air intake frame through a pipeline.

2. The multi-inlet vacuum pump according to claim 1, characterized in that: The air intake frame includes an air intake section and an air delivery section that are connected to each other. The air intake section extends horizontally in the front-to-back direction and the air intake nozzles are arranged sequentially on the air intake section. The air intake section is also provided with a vacuum gauge interface and a vacuum gauge is connected accordingly. The solenoid valve is connected at the junction of the air intake section and the air delivery section, and the plug of the solenoid valve is sealed and cooperated with the outlet of the air intake section. The outlet of the air delivery section is fixedly connected to the bracket.

3. The multi-inlet vacuum pump according to claim 2, characterized in that: The central axis of the gas delivery section and the central axis of the air intake section form an inclined angle.

4. The multi-inlet vacuum pump according to claim 2, characterized in that: The air intake section and the air delivery section are integrally formed.

5. The multi-inlet vacuum pump according to claim 1, characterized in that: The protective cover has an inwardly recessed cavity, and the air inlet is located inside the cavity and does not protrude outside the cavity.

6. The multi-inlet vacuum pump according to claim 1, characterized in that: The protective cover has a handle in front of the vacuum gauge, and the upper surface of the vacuum gauge is lower than the upper surface of the handle.

7. The multi-inlet vacuum pump according to claim 1, characterized in that: The protective cover comprises two half-covers joined together, and the two half-covers are fixedly connected by bolts.

8. The multi-inlet vacuum pump according to claim 1, characterized in that: There are at least three air intake nozzles.

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