CN110319013B - Vacuum pump and vehicle with same - Google Patents

Abstract

A vacuum pump and a vehicle having the vacuum pump, the vacuum pump includes a rotating shaft, a rotating shaft casing, blades, a vacuum pump casing, a pressure detector, a clutch device and a control unit, the rotating shaft casing is sleeved outside the rotating shaft, the The vane is arranged in the vacuum pump housing and connected with the rotating shaft housing, the pressure detector detects the real-time air pressure in the vacuum booster, and transmits the real-time air pressure to the control unit, and the clutch device is arranged in the Between the rotating shaft and the rotating shaft casing, and controls the combination and separation of the rotating shaft casing and the rotating shaft, the control unit controls the clutch device according to the real-time air pressure. When combined, the rotating shaft drives the rotating shaft casing and the blades to rotate, and when the clutch device is disconnected, the rotating shaft idles in the rotating shaft casing. The vacuum pump can realize the function of providing vacuum negative pressure according to braking requirements, reducing fuel consumption and saving energy.

Description

Vacuum pump and vehicle having the same

technical field

The invention relates to the field of vehicle parts, in particular to a vacuum pump and a vehicle having the vacuum pump.

Background technique

At present, the supercharged engine is matched with a vacuum pump to vacuumize the brake booster of the whole vehicle, so that it can generate negative pressure and realize vacuum boosting.

When the engine is running, the mechanical vacuum pump is always working with the camshaft, so the brake booster is always kept close to the maximum vacuum. Since the vehicle does not always require braking under normal operating conditions, there is a surplus of vacuum generated by the vacuum pump. This increases the power consumption of the vacuum pump and increases the fuel consumption of the engine.

SUMMARY OF THE INVENTION

The invention provides a vacuum pump and a vehicle with the vacuum pump, which can realize the function of providing vacuum negative pressure according to braking requirements, reduce fuel consumption and save energy.

The present invention provides a vacuum pump, comprising a rotating shaft, a rotating shaft casing, vanes, a vacuum pump casing, a pressure detector, a clutch device and a control unit. The rotating shaft casing is sleeved on the outside of the rotating shaft, and the vanes are arranged on the The vacuum pump housing is connected to the shaft housing, the pressure detector detects the real-time air pressure in the vacuum booster, and transmits the real-time air pressure to the control unit, and the clutch device is arranged on the shaft and the rotating shaft. between the rotating shaft housings, and controls the combination and separation of the rotating shaft housing and the rotating shaft, the control unit controls the clutch device according to the real-time air pressure, when the clutch device is combined, the The rotating shaft drives the rotating shaft casing and the blades to rotate. When the clutch device is disconnected, the rotating shaft rotates idly in the rotating shaft casing. The clutch device includes a hydraulic pipeline, an elastic member and a connecting pin. The hydraulic pressure The pipeline is formed on the side wall of the rotating shaft housing, and a first accommodating groove communicating with the hydraulic pipeline is also formed on the side wall of the rotating shaft housing, and the rotating shaft is connected with the first accommodating groove. A second accommodating groove is provided at a position where the accommodating groove is adapted, the connecting pin is disposed in the first accommodating groove, and the elastic member is disposed between the connecting pin and the first accommodating groove. Between the rigid walls, the control unit controls the hydraulic pressure in the hydraulic pipeline, and through the cooperation of the hydraulic pressure in the hydraulic pipeline and the elastic member, the connecting pin can extend into the second The two states of the accommodating groove and the second accommodating groove are switched. When the connecting pin is detached from the second accommodating groove, the rotating shaft is separated from the rotating shaft housing. When the connecting pin shaft extends into the second accommodating groove, the rotating shaft is combined with the rotating shaft housing.

Further, an air pressure threshold is set in the control unit. When the real-time air pressure is greater than the air pressure threshold, the control unit controls the clutch device to combine the rotating shaft with the rotating shaft housing. When the real-time air pressure is less than When the air pressure threshold is reached, the control unit controls the clutch device to separate the rotating shaft from the rotating shaft housing.

Further, the air pressure threshold includes a first air pressure threshold and a second air pressure threshold. When the real-time air pressure is greater than the first air pressure threshold, the control unit controls the clutch device to engage, and when the real-time air pressure is less than the first air pressure threshold When the second air pressure threshold is reached, the control unit controls the clutch device to disengage.

Further, the hydraulic pipeline is communicated with the engine cooling system through a connecting pipe, and the hydraulic pipeline is filled with the cooling liquid of the engine cooling system.

Further, a throttle valve is provided on the connecting pipe, and the control unit controls the hydraulic pressure in the hydraulic pipeline by controlling the pressure loss on both sides of the throttle valve.

Further, the diameter of the end of the connecting pin away from the second accommodating groove is smaller than the diameter of the end close to the second accommodating groove, so that the connecting pin is formed with a direction toward the first accommodating groove. direction of the step surface.

Further, viewed from the side, the edge of the end of the connecting pin shaft on the side facing the second accommodating groove is arc-shaped.

Further, there are multiple clutch devices, and the multiple clutch devices are evenly arranged along the circumferential direction of the rotating shaft.

The present invention also provides a vehicle comprising the above-mentioned vacuum pump.

To sum up, in the present invention, compared with the prior art, a clutch device is arranged between the rotating shaft and the rotating shaft housing, the rotating shaft is no longer directly connected to the rotating shaft casing, and the clutch device controls the distance between the rotating shaft and the rotating shaft casing. Disconnection and connection of the rotating force; the real-time air pressure in the vacuum booster is detected by the pressure detector. When the real-time air pressure is high, the control unit, such as the ECU, controls the clutch device, and the rotating shaft passes through the rotating shaft housing to drive the blades to rotate to make the vacuum pump rotate. Vacuuming; when the real-time air pressure is low, the control unit controls the clutch device to separate, the rotating shaft is disconnected from the rotating shaft housing, and the rotating shaft idly rotates in the rotating shaft casing, and no longer drives the blades to rotate. The above structure can control whether the vacuum pump performs vacuuming treatment according to the pressure in the vacuum pump housing, which reduces fuel consumption and saves energy.

The above description is only an overview of the technical solutions of the present invention, in order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand , the following specific preferred embodiments, and in conjunction with the accompanying drawings, are described in detail as follows.

Description of drawings

FIG. 1 is a schematic diagram of a front view structure of a vacuum pump provided by an embodiment of the present invention.

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1 .

FIG. 3 is a schematic cross-sectional structure diagram of the vacuum pump in FIG. 1 .

FIG. 4 is an enlarged schematic view of the structure at B in FIG. 3 .

FIG. 5 is a schematic view of the structure when the clutch device is combined.

FIG. 6 is a system block diagram of a vacuum pump provided by an embodiment of the present invention.

FIG. 7 to FIG. 9 are schematic diagrams of each working state of the vacuum pump provided by the embodiment of the present invention.

Detailed ways

In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the present invention is described in detail below with reference to the accompanying drawings and preferred embodiments.

The invention provides a vacuum pump and a vehicle with the vacuum pump, which can realize the function of providing vacuum negative pressure according to braking requirements, reduce fuel consumption and save energy.

FIG. 1 is a schematic diagram of a front view structure of a vacuum pump provided by an embodiment of the present invention, FIG. 2 is an enlarged schematic diagram of the structure at A in FIG. 1 , FIG. 3 is a schematic diagram of a cross-sectional structure of the vacuum pump in FIG. FIG. 3 is an enlarged schematic view of the structure at B in FIG. 3 , FIG. 5 is a schematic view of the structure when the clutch devices are combined, and FIG. 6 is a system block diagram of a vacuum pump provided by an embodiment of the present invention. As shown in FIGS. 1 to 6 , the vacuum pump provided by the embodiment of the present invention includes a rotating shaft 10 , a rotating shaft casing 20 , a vane 30 , a vacuum pump casing 40 , a pressure detector 50 , a clutch device 60 and a control unit 70 , and the rotating shaft casing 20 Sleeve outside the rotating shaft 10, the vane 30 is disposed in the vacuum pump casing 40, and is connected with the rotating shaft casing 20, the pressure detector 50 detects the real-time air pressure in the vacuum booster, and transmits the real-time air pressure to the control unit 70, the clutch device 60 is arranged between the rotating shaft 10 and the rotating shaft housing 20, and controls the combination and separation between the rotating shaft 10 and the rotating shaft casing 20. The control unit 70 controls the clutch device 60 according to the real-time air pressure. When the clutch device 60 is combined, the rotating shaft 10 drives the shaft housing 20 and the blades 30 to rotate. When the clutch device 60 is disconnected, the shaft 10 rotates idly in the shaft housing 20 .

In this embodiment, compared with the prior art, a clutch device 60 is provided between the rotating shaft 10 and the rotating shaft housing 20 , the rotating shaft 10 is no longer directly connected to the rotating shaft casing 20 , and the rotating shaft 10 and the rotating shaft casing are controlled by the clutch device 60 . The disconnection and connection of the rotational force between the bodies 20; the real-time air pressure in the vacuum booster is detected by the pressure detector 50, and when the real-time air pressure is high, the control unit 70, such as ECU (Electronic Control Unit), controls the clutch device 60 In combination, the rotating shaft 10 drives the blades 30 to rotate through the rotating shaft housing 20, so that the vacuum pump performs the vacuuming operation; when the real-time air pressure is low, the control unit 70 controls the clutch device 60 to separate, the rotating shaft 10 is disconnected from the rotating shaft casing 20, and the rotating shaft 10 rotates idly in the rotating shaft housing 20, no longer drives the blades 30 to rotate, and the vacuum pump stops the vacuuming operation. The above structure can control whether the vacuum pump performs vacuuming treatment according to the pressure in the vacuum booster, which reduces fuel consumption and saves energy.

Further, in this embodiment, the control unit 70 stores an air pressure threshold. When the real-time air pressure is greater than the air pressure threshold, the control unit 70 controls the clutch device 60 to combine, so that the rotating shaft 10 drives the rotating shaft housing 20 to rotate, and the vacuum pump starts the vacuuming operation. When the real-time air pressure is less than the air pressure threshold, the control unit 70 controls the clutch device 60 to separate, so that the rotating shaft 10 is idling relative to the rotating shaft housing 20, the rotating shaft casing 20 will no longer rotate with the rotating shaft 10, and the vacuum pump stops vacuuming.

More specifically, in order to further save fuel consumption and reduce the number of times the clutch device 60 is activated, the air pressure threshold includes a first air pressure threshold and a second air pressure threshold. When the real-time air pressure is greater than the first air pressure threshold, the control unit 70 controls the clutch device 60 to combine. , the vacuum pump starts the vacuuming operation, and the air pressure in the vacuum pump continuously decreases. When the real-time air pressure is less than the second air pressure threshold, the control unit 70 controls the clutch device 60 to separate, and the vacuum pump stops the vacuuming operation.

Please continue to refer to FIGS. 1 to 5 , the clutch device 60 includes a hydraulic pipeline 61 , an elastic member 62 and a connecting pin 63 . The hydraulic pipeline 61 is formed on the side wall of the shaft housing 20 , and the A first accommodating groove 21 that communicates with the hydraulic pipeline 61 is formed thereon, a second accommodating groove 11 is provided on the rotating shaft 10 at a position corresponding to the first accommodating groove 21, and the connecting pin 63 is arranged in the first accommodating groove 11. Inside the slot 21, an elastic member 62, such as a tension spring, is arranged between the connecting pin 63 and the rigid wall of the first accommodating slot 21, preferably, connected to the end of the connecting pin 63 away from the second accommodating slot 11 On the side wall of the first accommodating groove 21, the control unit 70 controls the hydraulic pressure in the hydraulic pipeline 61, and through the cooperation of the hydraulic pressure and the elastic member 62, the connecting pin 63 can extend into the second accommodating groove 11 and disengage. Switch between the two states in contact with the second accommodating groove 11 . When the connecting pin 63 is separated from the second accommodating groove 11 (as shown in FIG. 4 ), the rotating shaft 10 is separated from the rotating shaft housing 20 ; when the connecting pin 63 extends into the second accommodating groove 11 , the rotating shaft 10 and the rotating shaft casing 20 are separated. In combination (as shown in FIG. 5 ), the rotating shaft 10 drives the rotating shaft housing 20 to rotate.

Preferably, the hydraulic line 61 is connected with the engine cooling system through the connecting pipe 64, and the connecting pipe 64 introduces the cooling liquid of the cooling system, such as hydraulic oil, into the hydraulic line 61, and this arrangement can make the clutch device 60 no longer need additional hydraulic pressure Provide the device.

Further, in this embodiment, a throttle valve 65 is provided on the connecting pipe 64 , and the control unit 70 controls the hydraulic pressure in the hydraulic pipeline 61 by controlling the pressure loss on both sides of the throttle valve 65 . When the hydraulic pressure in the pipeline 61 is high, the hydraulic pressure can overcome the pulling force of the elastic member 62, push the connecting pin 63 into the second accommodating groove 11, and make the elastic member 62 in a stretched state; When the hydraulic pressure is small, the restoring force of the elastic member 62 pulls the connecting pin 63 away from the second accommodating groove 11 .

In this embodiment, the diameter of the end of the connecting pin 63 away from the second accommodating groove 11 is smaller than the diameter of the end close to the second accommodating groove 11 , so that the connecting pin 63 is formed with a diameter toward the direction of the first accommodating groove 21 . The step surface 631 , the setting of the step surface 631 is beneficial to the hydraulic pressure in the first accommodating groove 21 to push the connecting pin 63 to move.

Further, viewed from the side, the edge of the end of the connecting pin 63 facing the second accommodating groove 11 is arc-shaped, so as to facilitate the rotation of the second accommodating groove 11 on the rotating shaft 10 to the second accommodating groove 11 When the grooves 11 are opposite to each other, the connecting pin 63 can smoothly enter the second accommodating groove 11 .

In order to facilitate the stability of movement when the rotating shaft 10 is combined with the rotating shaft housing 20 , in this embodiment, there are multiple clutch devices 60 (two are shown in FIG. 3 ), and the multiple clutch devices 60 are evenly arranged along the circumferential direction of the rotating shaft 10 . .

FIGS. 7 to 9 are schematic diagrams of the vacuum pump provided in the embodiments of the present invention in various working states. The working process of the vacuum pump provided by the present invention will be described below with reference to FIGS. 1 to 9 . When the pressure detector 50 detects the vacuum booster When the real-time air pressure is higher than the first air pressure threshold, it means that the air pressure in the vacuum booster is not enough to meet the needs of braking, the control unit 70 adjusts the throttle valve 65, increases the hydraulic pressure in the hydraulic pipeline 61, and connects the pin shaft 63 is pushed into the second accommodating groove 11, and the rotating shaft 10 starts to drive the rotating shaft housing 20 and the blade 30 to rotate. When the vane 30 just rotates through the air inlet 41 on the vacuum pump housing 40 (the air inlet 41 is connected to the vacuum booster), the suction cavity 43 begins to form, and the exhaust cavity 44 rotates with the vane 30 to pass the gas through the exhaust port 42 is discharged (Fig. 7). As the vane 30 rotates, the suction chamber 43 increases little by little, so that the air pressure in the chamber gradually decreases (ie, the negative pressure gradually increases), and the air in the vacuum booster is sucked into the vacuum pump (as shown in Figure 8). When the vane 30 is just about to rotate through the air inlet 41, the air suction chamber 43 in the vacuum pump reaches the maximum and the air pressure is also the lowest (as shown in FIG. 9). Then the next cycle of rotation will be performed. With the rotation of the vane 30, the air pressure in the vacuum booster is continuously reduced. When the real-time air pressure is less than the second air pressure threshold, the control unit 70 adjusts the throttle valve 65 to reduce the hydraulic pressure in the hydraulic pipeline 61, and the connecting pin 63 is closed. The elastic member 62 is pulled out from the second accommodating groove 11 , the rotating shaft 10 is released from the contact with the rotating shaft housing 20 and self-propagating, the rotating shaft casing 20 and the vanes 30 no longer rotate with the rotating shaft 10 , and the vacuum pump stops working.

To sum up, in the present invention, compared with the prior art, the clutch device 60 is arranged between the rotating shaft 10 and the rotating shaft housing 20 , the rotating shaft 10 is no longer directly connected with the rotating shaft housing 20 , and the rotating shaft is controlled by the clutch device 60 . The disconnection and connection of the rotational force between the 10 and the shaft housing 20; the real-time air pressure in the vacuum booster is detected by the pressure detector 50, and when the real-time air pressure is high, the control unit 70, such as an ECU (Electronic Control Unit electronic control unit) ) control the clutch device 60 to be combined, the rotating shaft 10 drives the blade 30 to rotate through the rotating shaft housing 20, so that the vacuum pump is evacuated; when the real-time air pressure is low, the control unit 70 controls the clutch device 60 to separate, and the rotating shaft 10 is disconnected from the rotating shaft housing 20 When connected, the rotating shaft 10 rotates idly in the rotating shaft housing 20, and no longer drives the blades 30 to rotate. The above structure can control whether the vacuum pump performs vacuuming treatment according to the pressure in the vacuum pump housing 40 , which reduces fuel consumption and saves energy.

The present invention also provides a vehicle, which includes the above-mentioned vacuum pump. For other technical features of the vehicle, please refer to the prior art, which will not be repeated here.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. The technical personnel, within the scope of the technical solution of the present invention, can make some changes or modifications by using the technical content disclosed above to be equivalent embodiments of equivalent changes, provided that they do not depart from the technical solution content of the present invention, according to the technical solution of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solutions of the present invention.

Claims (9)

1. A vacuum pump, characterized in that: comprising a rotating shaft, a rotating shaft casing, a vane, a vacuum pump casing, a pressure detector, a clutch device and a control unit, the rotating shaft casing is sleeved outside the rotating shaft, and the vane is provided with in the vacuum pump housing and connected with the rotating shaft housing, the pressure detector detects the real-time air pressure in the vacuum booster, and transmits the real-time air pressure to the control unit, and the clutch device is arranged in the Between the rotating shaft and the rotating shaft housing, and controls the combination and separation of the rotating shaft casing and the rotating shaft, the control unit controls the clutch device according to the real-time air pressure, when the clutch device is combined , the rotating shaft drives the rotating shaft housing and the blades to rotate. When the clutch device is disconnected, the rotating shaft rotates idly in the rotating shaft casing. The clutch device includes a hydraulic pipeline, an elastic member and a connecting pin. The hydraulic pipeline is formed on the side wall of the rotating shaft housing, and a first accommodating groove communicated with the hydraulic pipeline is also formed on the side wall of the rotating shaft housing. A second accommodating groove is provided at a position where the first accommodating groove is adapted, the connecting pin is disposed in the first accommodating groove, and the elastic member is disposed between the connecting pin and the first accommodating groove. Between the rigid walls of the slot, the control unit controls the hydraulic pressure in the hydraulic pipeline, and through the cooperation of the hydraulic pressure in the hydraulic pipeline and the elastic member, the connecting pin can extend into the The second accommodating groove and the two states of disengaging from the second accommodating groove are switched. When the connecting pin is detached from the second accommodating groove, the rotating shaft is separated from the rotating shaft housing. When the connecting pin shaft extends into the second accommodating groove, the rotating shaft is combined with the rotating shaft housing. 2 . The vacuum pump according to claim 1 , wherein an air pressure threshold is set in the control unit, and when the real-time air pressure is greater than the air pressure threshold, the control unit controls the clutch device to make the rotating shaft and the In combination with the shaft housing, when the real-time air pressure is less than the air pressure threshold, the control unit controls the clutch device to separate the shaft from the shaft housing. 3 . The vacuum pump according to claim 2 , wherein the air pressure threshold includes a first air pressure threshold and a second air pressure threshold, and when the real-time air pressure is greater than the first air pressure threshold, the control unit controls the In combination with the clutch device, when the real-time air pressure is less than the second air pressure threshold, the control unit controls the clutch device to disengage. 4 . The vacuum pump according to claim 1 , wherein the hydraulic pipeline is communicated with the engine cooling system through a connecting pipe, and the hydraulic pipeline is filled with the cooling liquid of the engine cooling system. 5 . 5 . The vacuum pump according to claim 4 , wherein a throttle valve is arranged on the connecting pipe, and the control unit controls the pressure loss on both sides of the throttle valve to control the hydraulic pressure pipe. 6 . The hydraulic pressure in the road is controlled. 6 . The vacuum pump according to claim 1 , wherein the diameter of the end of the connecting pin away from the second accommodating groove is smaller than the diameter of the end close to the second accommodating groove, so that the connecting pin The shaft is formed with a stepped surface facing the direction of the first accommodating groove. 7 . The vacuum pump according to claim 1 , wherein, viewed from the side, the edge of the end of the connecting pin shaft facing the side of the second accommodating groove is arc-shaped. 8 . 8 . The vacuum pump according to claim 1 , wherein there are multiple clutch devices, and the multiple clutch devices are evenly arranged along the circumference of the rotating shaft. 9 . 9. A vehicle, characterized in that the vehicle comprises the vacuum pump of any one of claims 1 to 8.

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