A vehicle-mounted self-cooling gear-type cleaning pump

Abstract

A vehicle-mounted self-cooling gear-type cleaning pump, which comprises an end cover, a control circuit board assembly, a stator assembly, a housing, a waterproof cup, a rotor assembly, a sealing seat, a gear pump assembly, and a pump cover. The stator assembly is installed in the housing and supported by an inner frame of the housing. The end cover is installed at one end of the housing. The control circuit board assembly is installed in the space between the end cover and the housing. The waterproof cup is placed in the rotor cavity of the stator assembly, and the cup body of the waterproof cup is closely attached to the stator assembly. The cup mouth of the waterproof cup is fixed on the inner frame of the housing by the sealing seat. The rotor assembly is rotatably fixed in the cup, and both ends of the rotor shaft are rollingly supported by the cup bottom and the sealing seat. The gear pump assembly is fixed on the sealing seat, the driving gear is connected to one end of the rotor shaft, the liquid inlet of the liquid inlet chamber and the liquid outlet of the liquid outlet chamber of the gear pump communicate with the cup body. The pump cover is fixed at the other end of the housing and fixes the gear pump assembly in the housing. The pump cover is provided with a liquid outlet channel and a liquid inlet channel, which communicate with the liquid outlet of the liquid outlet chamber and the liquid inlet of the liquid inlet chamber of the gear pump assembly respectively.

Description

Technical Field

[0001] The present invention relates to a vehicle cleaning pump, and particularly to a gear type vehicle cleaning pump. Background Art

[0002] With the continuous improvement of the artificial intelligence level of vehicles, more lidars and cameras that support autonomous driving will be installed on future vehicles. Reliable perception detection and accurate evaluation of the vehicle driving environment are the basic prerequisites for automatic parking, driving assistance functions, and autonomous driving, and are the link for the vehicle to interact with the external environment. Therefore, the cleaning of lidars and cameras is becoming increasingly important. At the same time, due to the increasing number of lidars and cameras on the vehicle while the amount of cleaning fluid carried by the vehicle itself is limited and the power supply conditions are restricted, the centrifugal cleaning pump used in the cleaning device has a relatively small injection pressure, and more cleaning fluid needs to be consumed to clean the lidars and cameras. Therefore, there is an urgent need to design a vehicle self-cooling gear type cleaning pump that can perform high-pressure cleaning, reduce the consumption of cleaning fluid, and shorten the cleaning time, so as to meet the requirement of keeping the lidars and cameras clean under the existing vehicle water and electricity conditions. At the same time, since the motor that drives the pump to rotate generates heat, it is necessary to timely remove the heat to reduce the temperature of the cleaning pump and improve the working stability of the cleaning pump. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a vehicle self-cooling gear type cleaning pump for the existing technical situation, which can generate high-pressure cleaning fluid and can dissipate heat by itself.

[0004] The technical solution adopted by the present invention to solve the above technical problem is: a vehicle self-cooling gear type cleaning pump, which includes an end cover, a control circuit board assembly, a stator assembly, a housing, a waterproof cup, a rotor assembly, a sealing seat, a gear pump assembly, and a pump cover. The stator assembly is installed in the housing and supported by an inner frame of the housing. The end cover is installed at one end of the housing. The control circuit board assembly is installed in the space between the end cover and the housing. The waterproof cup is placed in the rotor cavity of the stator assembly, and the cup body of the waterproof cup is closely attached to the stator assembly. The cup mouth of the waterproof cup is fixed on the inner frame of the housing by the sealing seat. The rotor assembly is rotatably fixed in the cup, and both ends of the rotor shaft of the rotor assembly are supported by rolling by the cup bottom and the sealing seat. The gear pump assembly is fixed on the sealing seat, and its driving gear is connected to one end of the rotor shaft. The outlet of the liquid inlet cavity and the inlet of the liquid outlet cavity of the gear pump communicate with the cup body. The pump cover is fixed on the other end of the housing and fixes the gear pump assembly in the housing. The pump cover is provided with a liquid outlet channel and a liquid inlet channel, which communicate with the liquid outlet of the liquid outlet cavity and the liquid inlet of the liquid inlet cavity of the gear pump assembly respectively.

[0005] Preferably, the thickness of the waterproof cup does not exceed 0.3 mm, which can reduce the air-gap magnetic resistance loss, improve the efficiency of the cleaning pump, reduce the usage amount of the motor component materials, increase the power density of the cleaning pump, and reduce the cost and weight of the cleaning pump.

[0006] Preferably, a vibration damping and flow splitting plate is arranged between the gland and the gear seat. The vibration damping and flow splitting plate is limited by a circumferential positioning component of the housing and a radial positioning component of the pump cover. The vibration damping and flow splitting plate is provided with a liquid outlet flow splitting port and a liquid inlet flow splitting port, which are respectively docked with a liquid outlet flow splitting channel and a liquid inlet flow splitting channel arranged on the pump cover. The vibration damping and flow splitting plate is made of an elastic material, so that it plays a role in vibration damping and noise reduction when the cleaning pump works.

[0007] Preferably, one end of the rotor shaft of the rotor assembly is press-fitted into the bottom of the waterproof cup by a graphite bushing, and the other end is installed in the seal seat by another graphite bushing.

[0008] Preferably, the gear pump assembly includes a driving gear, a driven gear component, a gear chamber assembly, and a gear seat. One end of the gear chamber assembly is sealed with the seal seat, and the other end is sealed with the gear seat. The gear chamber assembly includes a gear chamber. The driving gear and the driven gear component are placed in the gear chamber. The driving gear meshes with the driven gear. One end of the driving gear is fixed to one end of the rotating shaft of the rotor assembly, and the other end is supported by rolling of the gear seat. Both ends of the driven gear component are supported by rolling of the seal seat and the gear seat respectively.

[0009] Preferably, the seal seat and the gear chamber assembly are integrated as a component of the gear pump assembly, so that the structure is simpler.

[0010] Preferably, a gasket is arranged in the seal seat and the two are injection-molded together, which can facilitate assembly.

[0011] Preferably, the gear seat is provided with a flow control plate and the two are injection-molded together, which can facilitate assembly.

[0012] Preferably, a sealing ring is arranged between the pump cover and the housing for sealing. The pump cover and the housing are connected by a snap connection, which can facilitate assembly without welding.

[0013] Preferably, a sealing ring is arranged between the end cover and the housing for sealing. The end cover and the housing are connected by a snap connection, which can facilitate assembly without welding.

[0014] Compared with the prior art, the advantages of the present invention are as follows: Since the cleaning pump adopts a gear pump assembly, it can generate high-pressure cleaning liquid, thereby reducing the use of cleaning liquid and still maintaining the requirement of keeping the lidar and camera clean on the premise of reducing the consumption of cleaning liquid. Also, since a waterproof cup is provided in the stator cavity and the outer circle of the waterproof cup closely adheres to the surface of the middle stator assembly, and the cleaning liquid is introduced into it, the heat generated by the stator assembly can be carried away through the continuous flow of the cleaning liquid, thereby realizing automatic heat dissipation of the cleaning pump, reducing the temperature of the cleaning pump, and improving the working stability of the cleaning pump. Description of the Drawings

[0015] Figure 1 is a schematic external view of a vehicle-mounted self-cooling gear type cleaning pump according to an embodiment of the present invention.

[0016] Figure 2 is an exploded schematic view of a vehicle-mounted self-cooling gear type cleaning pump according to an embodiment of the present invention.

[0017] Figures 3 to 5 is a schematic structural view of a vehicle-mounted self-cooling gear type cleaning pump according to an embodiment of the present invention.

[0018] Figure 6 is a three-dimensional schematic view of a seal seat of a vehicle-mounted self-cooling gear type cleaning pump according to an embodiment of the present invention.

[0019] Figure 7 is a three-dimensional schematic view of a gear chamber of a vehicle-mounted self-cooling gear type cleaning pump according to an embodiment of the present invention.

[0020] Figure 8 is a three-dimensional schematic view of a flow control plate of a vehicle-mounted self-cooling gear type cleaning pump according to an embodiment of the present invention.

[0021] Figure 9 is a three-dimensional schematic view of a gear seat of a vehicle-mounted self-cooling gear type cleaning pump according to an embodiment of the present invention.

[0022] Figure 10 is a three-dimensional schematic view of a vibration damping and flow splitting plate of a vehicle-mounted self-cooling gear type cleaning pump according to an embodiment of the present invention.

[0023] Figure 11 is a three-dimensional schematic view of a pump cover of a vehicle-mounted self-cooling gear type cleaning pump according to an embodiment of the present invention. Detailed Embodiments

[0024] The present invention will be further described below with reference to the drawings and embodiments.

[0025] As Figures 1 - 5As shown in the figure, a vehicle self-cooling gear type cleaning pump includes an end cover 10, a control circuit board assembly 20, a positioning bracket 30, a stator assembly 40, a housing 50, a sealing ring 60, a waterproof cup 70, a rotor assembly 80, a sealing seat 90, a gasket 100, a driving gear 110, a driven gear component 120, positioning pins 130, 140, a gear chamber assembly 150, a flow control plate 160, a gear seat 170, a vibration damping and flow splitting plate 180, a pump cover 190, and graphite bushings 200, 210.

[0026] The above-mentioned stator assembly 40 is installed in the upper inner cavity of the housing 50 and is supported and fixed by the inner frame 503 of the housing 50. The positioning bracket 30 is installed on the stator assembly 40, the control circuit board assembly 20 is installed on the positioning bracket 30, and the end cover 10 is installed on the upper part of the housing 50. After pressing and limiting the control circuit board assembly 20, it is fixed to one end of the housing 50 by laser welding.

[0027] The above-mentioned sealing seat 90, gasket 100, gear chamber assembly 150, flow control plate 160, gear seat 170, and vibration damping and flow splitting plate 180 are sequentially connected together and installed in the lower inner cavity of the positioning bracket 30 of the housing 50. After being pressed and limited by the pump cover 190, the pump cover 190 is fixed to the housing 50 by laser welding.

[0028] The above-mentioned control circuit board assembly 20 includes a circuit board component 201, a positive electrode plug 202, a negative electrode plug 203, and a LIN control plug 204.

[0029] The above-mentioned positive electrode plug 202, negative electrode plug 203, and LIN control plug 204 are respectively soldered to the pads of the circuit board component 201 by soldering.

[0030] The above-mentioned circuit board component 201 is provided with U-phase line terminal pads 205, V-phase line terminal pads 206, and W-phase line terminal pads 207.

[0031] The above-mentioned stator assembly 40 includes a stator component 401, a W-phase line terminal 402, a V-phase line terminal 403, and a U-phase line terminal 404.

[0032] The above-mentioned W-phase line terminal 402, V-phase line terminal 403, and U-phase line terminal 404 are respectively pressed into the terminal holes provided in the stator component 401, and the W-phase, V-phase, and U-phase winding wires are connected and fixed to the terminals by spot welding.

[0033] The above-mentioned W-phase line terminal 402, V-phase line terminal 403, and U-phase line terminal 404 are respectively inserted into the W-phase line terminal pad 207, U-phase line terminal pad 205, and V-phase line terminal pad 206 of the control circuit board assembly, and are connected and fixed by soldering.

[0034] As Figure 3As shown, a waterproof cup 70 is installed in the rotor cavity 405 of the stator assembly 40. A sealing surface 701 is provided at the cup mouth of the waterproof cup 70. The sealing surface 701 is placed on the inner frame 503 of the housing and fixed to the inner frame 503 of the housing by a sealing seat 90.

[0035] The outer circle of the cup body of the waterproof cup 70 is closely attached to the outer circle of the stator assembly 40. The heat generated by the stator assembly 40 can be transferred to the internally circulating cleaning liquid through the waterproof cup 70, and the heat generated in the rotor is also transferred to the cleaning liquid. The heat is taken away by the circulating cleaning liquid to achieve automatic heat dissipation, thereby reducing the temperature rise of the motor, improving the efficiency and reliability of the motor.

[0036] The thickness of the waterproof cup 70 is 0.3 mm or less, which reduces the total air gap between the stator assembly 40 and the rotor, reduces the air gap magnetic resistance loss, reduces the use of stator assembly materials, improves the motor power density, reduces the overall cost, and also reduces the weight of the entire cleaning pump, meeting the requirements of lightweight design and achieving the effect of energy conservation and emission reduction.

[0037] A sealing ring 60 is provided between the sealing surface 701 of the waterproof cup and the inner frame 503 of the housing that supports the stator assembly 40 to better seal the waterproof cup and the stator assembly and prevent the cleaning liquid in the waterproof cup 70 from entering the stator assembly 40.

[0038] Positioning ports 702 and 703 are respectively provided at the outer circle of the sealing surface 701 of the waterproof cup 70, and are respectively used for anti-rotation limit in the circumferential direction with the positioning ribs 502 and 501 provided on the housing 50.

[0039] The bottom 704 of the waterproof cup is press-fitted with a graphite bushing 210 and has an interference fit with the bottom. The inner hole of the graphite bushing 210 supports the outer circle of the rotor shaft 801.

[0040] The rotor assembly 80 includes a rotor shaft 801, a stop copper ring 802, a rotor 803, a magnetic ring 804, and a stop copper ring 805. The stop copper ring 802 and the stop copper ring 805 are first press-fitted onto the rotor shaft 801 using an interference fit structure, and then integrated with the rotor 803 and the magnetic ring 804 by insert molding. One end of the rotor shaft 801 is connected to the inner hole of the graphite bushing 210 and rotates driven by the stator assembly. The other end is provided with a shaft flat 8011, which cooperates with the hole flat 1101 provided in the inner hole of the driving gear 110 to drive the driving gear 110 to rotate.

[0041] Positioning pins 130 and 140 are installed on the sealing seat 90. The positioning pins 130 and 140 connect and limit the following components in series.

[0042] The gasket 100 is installed on the sealing seat 90. The gasket 100 is provided with a liquid flow hole 1001 to enable the cleaning liquid to flow between the gear pump chamber and the waterproof cup 70.

[0043] A rotor shaft through-hole 1002 is provided at the center of the above-mentioned gasket 100 for the rotor shaft 801 to pass through the gasket 100.

[0044] The above-mentioned driven gear component 120 is integrally injection-molded with the driven gear 1201 by the driven shaft 1202 through an embedded insert. An annular groove 12022 is provided in the middle of the driven shaft 1202, and straight knurling 12021 and straight knurling 12023 are respectively provided at both ends of the annular groove 12022 for circumferential anti-rotation and axial anti-movement limit of the driven gear 1201.

[0045] The above-mentioned pump cover 190 is provided with an inlet main flow channel 1906 as the flow channel for the cleaning liquid to start entering the cleaning pump, and an outlet main flow channel 1907 as the flow channel for the cleaning liquid to flow out of the cleaning pump after being pressurized.

[0046] As Figure 6 shown, the above-mentioned seal seat 90 is provided with a positioning port 901 and a positioning port 906, which are respectively used for circumferential anti-rotation limit with the positioning ribs 502 and 501 provided on the housing 50. A positioning pin blind hole 902 and a positioning pin blind hole 905 are provided to fix the positioning pins 140 and 130 respectively. A rotor assembly chamber liquid flow hole 903 is provided for the flow of the cleaning liquid. A driven shaft hole 904 is provided for radial limit of the driven shaft 1202. A rotor shaft through-hole 907 is provided at one end of the center for the rotor shaft 801 to pass through the seal seat 90. A graphite bushing fixing hole 908 is provided at the other end of the center, and the graphite bushing 200 is fixed in this hole by interference fit.

[0047] As Figure 7 shown, the above-mentioned gear chamber assembly 150 is provided with an inlet chamber 1501, a driven gear chamber 1502, an outlet chamber 1503 and a driving gear chamber 1506. The cleaning liquid enters the driving gear chamber 1506 and the driven gear chamber 1502 from the inlet chamber 1501, and the driven gear 1201 is driven by the driving gear 110 to engage and rotate to squeeze the cleaning liquid. The pressurized cleaning liquid flows out from the outlet chamber 1503. Positioning pin holes 1504 and 1507 are provided to cooperate with the positioning pins 140 and 130 respectively to position the gear chamber assembly 150. The gear chamber assembly 150 is a common main structure of a gear pump and will not be described in detail here.

[0048] The above-mentioned gear chamber assembly 150 is provided with a positioning port 1505 and a positioning port 1508, which are respectively used for circumferential anti-rotation limit with the positioning ribs 502 and 501 provided on the housing 50.

[0049] As Figure 8As shown, the above-mentioned flow control plate 160 is provided with a driven shaft through-hole 1601 for the driven shaft 1202 to pass through the flow control plate 160, and a fan-shaped liquid outlet 1602 is provided. The cleaning liquid with pressure in the liquid outlet cavity 1503 passes through this liquid outlet, which can reduce the backflow of the cleaning liquid entering the liquid outlet hole 1702 of the gear seat 170 and reduce noise, thus affecting the output pressure.

[0050] The above-mentioned flow control plate 160 is provided with a positioning pin hole 1603 and a positioning pin hole 1608 for positioning the flow control plate 160 through the positioning pin 140 and the positioning pin 130.

[0051] The above-mentioned flow control plate 160 is provided with a positioning port 1604 and a positioning port 1607, which are respectively circumferentially anti-rotation limited with the positioning ribs 502 and 501 provided on the housing 50.

[0052] The above-mentioned flow control plate 160 is provided with a rotor shaft through-hole 1605 at the center for the rotor shaft 801 to pass through the flow control plate 160.

[0053] The above-mentioned flow control plate 160 is provided with a fan-shaped liquid inlet 1606 to control the cleaning liquid in the liquid inlet hole 1707 of the gear seat 170, reduce the appearance of eddy currents, and prevent the influence on the liquid inlet volume.

[0054] As Figure 9 shown, the above-mentioned gear seat 170 is provided with a driven shaft hole 1701 for positioning the driven shaft 1202.

[0055] The above-mentioned gear seat 170 is provided with a liquid inlet hole 1707 and a liquid outlet hole 1702, which are respectively used as the liquid inlet flow channel and the liquid outlet flow channel of the cleaning liquid. Positioning pin holes 1704 and 1708 are provided to fix the positioning pins 140 and 130 respectively. Guide conical surfaces 1703 and 1709 are provided to facilitate the positioning pins 140 and 130 to be introduced into the positioning pin holes 1704 and 1708 during assembly. Positioning ports 1705 and 17010 are provided, which are respectively circumferentially anti-rotation limited with the positioning ribs 502 and 501 provided on the housing 50.

[0056] The above-mentioned gear seat 170 is provided with an anti-interference blind hole 1706 at the center to avoid the end face of the rotor shaft 801 and prevent interference with the gear seat 170.

[0057] As Figure 10 and 11As shown, the above-mentioned vibration damping and flow splitting plate 180 is provided with positioning ports 1801 and 1804, which are respectively used for anti-rotation limit in the circumferential direction with the positioning bosses 1903 and 1905 provided on the pump cover 190. The liquid outlet flow splitting port 1802 and the liquid inlet flow splitting port 1803 are provided, which are respectively docked and split with the liquid outlet flow splitting channel 1902 and the liquid inlet flow splitting channel 1901 provided on the pump cover 190. The positioning ring 1904 provided on the pump cover 190 performs radial positioning on the vibration damping and flow splitting plate 180. The vibration damping and flow splitting plate 180 is made of an elastic material and plays a role in vibration damping and noise reduction when the cleaning pump is working.

[0058] During operation, the rotor rotates when powered on, so that the driving gear rotates and the cleaning liquid enters the cleaning pump from the outside through the liquid inlet flow splitting channel 1901. The cleaning liquid then passes through the vibration damping and flow splitting plate 180, the liquid inlet cavity 1501 of the gear pump chamber 150, the flow control plate 160, the sealing seat 90, and the gasket 100 and then enters the waterproof cup 70, absorbing the heat generated in the stator assembly 40 and the rotor assembly 80, as shown in Figure 4 , and then after being pressurized through the gasket 100, the sealing seat 90, the flow control plate 160 to the liquid outlet cavity 1503 of the gear pump chamber 150, it is then transported to the place to be cleaned for spraying through the vibration damping and flow splitting plate 180 and the liquid outlet flow splitting channel 1902.

Claims

1. A vehicle-mounted self-cooling gear-type cleaning pump, characterized in that: It includes an end cover, a control circuit board assembly, a stator assembly, a housing, a waterproof cup, a rotor assembly, a sealing seat, a gear pump assembly, and a pump cover. The stator assembly is installed in the housing and supported by an inner frame of the housing. The end cover is installed at one end of the housing. The control circuit board assembly is installed in the space between the end cover and the housing. The waterproof cup is placed in the rotor cavity of the stator assembly. The cup body of the waterproof cup is closely attached to the stator assembly. The cup mouth of the waterproof cup is fixed on the inner frame of the housing by the sealing seat. The rotor assembly is rotatably fixed in the cup. Both ends of the rotor shaft of the rotor assembly are rollingly supported by the cup bottom and the sealing seat. The gear pump assembly is fixed on the sealing seat. Its driving gear is connected to one end of the rotor shaft. The liquid inlet of the liquid inlet chamber and the liquid outlet of the liquid outlet chamber of the gear pump communicate with the cup body. The pump cover is fixed on the other end of the housing and fixes the gear pump assembly in the housing. The pump cover is provided with a liquid outlet shunt channel and a liquid inlet shunt channel, which respectively communicate with the liquid outlet of the liquid outlet chamber and the liquid inlet of the liquid inlet chamber of the gear pump assembly; A damping shunt plate is arranged between the pump cover and the gear seat. The damping shunt plate is limited by a circumferential positioning part of the housing and a radial positioning part of the pump cover. The damping shunt plate is provided with a liquid outlet shunt port and a liquid inlet shunt port, which are respectively docked with the liquid outlet shunt channel and the liquid inlet shunt channel arranged on the pump cover. The damping shunt plate is made of an elastic material; The thickness of the waterproof cup does not exceed 0.3 mm; One end of the rotor shaft of the rotor assembly is press-fitted into the bottom of the waterproof cup by a graphite bushing, and the other end is installed in the sealing seat by another graphite bushing; The gear pump assembly includes a driving gear, a driven gear component, a gear chamber component, and a gear seat. One end of the gear chamber component is sealed with the sealing seat, and the other end is sealed with the gear seat. The gear chamber component includes a gear chamber. The driving gear and the driven gear component are placed in the gear chamber. The driving gear meshes with the driven gear. One end of the driving gear is fixed to one end of the rotating shaft of the rotor assembly, and the other end is rollingly supported by the gear seat. Both ends of the driven gear component are rollingly supported by the sealing seat and the gear seat respectively.

2. The vehicle-mounted self-cooling gear type cleaning pump according to claim 1, characterized in that: The sealing seat and the gear chamber component are integrated.

3. The vehicle-mounted self-cooling gear-type cleaning pump according to claim 1, characterized in that: A gasket is arranged in the sealing seat and the two are injection-molded together.

4. The vehicle-mounted self-cooling gear-type cleaning pump according to claim 1, wherein: The gear seat is provided with a flow control plate and the two are injection-molded together.

5. The vehicle-mounted self-cooling gear-type cleaning pump according to claim 1, wherein: A sealing ring is arranged between the pump cover and the housing for sealing. The pump cover and the housing are connected in a snap-fit manner.

6. The vehicle-mounted self-cooling gear type cleaning pump according to claim 1, wherein: A sealing ring is arranged between the end cover and the housing for sealing. The end cover and the housing are connected in a snap-fit manner.

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