Pump device

Abstract

The application relates to the automobile technical field and discloses a pump device, wherein a main body assembly is contained in a shell; the main body assembly comprises a pump main body, a motor, a pressure sensor and a controller, the pump main body is provided with an inlet pipeline and an outlet pipeline, an inlet end of the inlet pipeline and an outlet end of the outlet pipeline are exposed to the shell, and the pump main body is used for pumping liquid medium from the inlet pipeline to the outlet pipeline; the motor is mechanically connected with the pump main body and is electrically connected with the controller, the motor is used for driving the pump main body to work under the control of the controller; the pressure sensor is electrically connected with the controller, the pressure sensor is used for collecting outlet side pressure of the pump main body and sending the outlet side pressure to the controller; and the controller is used for adjusting control parameters of the motor according to the outlet side pressure so that the outlet side pressure tends to a target value. The pump device provided by the application can realize closed-loop control of the outlet side pressure of the pump main body.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a pump device. BACKGROUND

[0002] The oil pump is an important component in the engine system, which is usually used to pump circulating engine oil.

[0003] In the related art, the oil pump is usually driven by the crankshaft of the engine and is transmitted through a chain or a gear structure. The oil pump with the mechanical transmission structure has a complex internal structure arrangement, large space size and high weight, and the oil pressure at the outlet side of the oil pump is largely dependent on the engine speed, which is difficult to independently adjust the oil pressure and is prone to energy waste. SUMMARY

[0004] Therefore, the present application provides a pump device that can achieve closed-loop control of the outlet side pressure of the pump body. Specifically, the technical scheme includes the following:

[0005] The pump device provided by the present application comprises a main body assembly and a housing, wherein the main body assembly is accommodated in the housing;

[0006] The main body assembly comprises a pump body, a motor, a pressure sensor and a controller,

[0007] The pump body has an inlet pipe and an outlet pipe, the inlet end of the inlet pipe and the outlet end of the outlet pipe are exposed to the housing, and the pump body is used to pump liquid medium from the inlet pipe to the outlet pipe;

[0008] The motor is mechanically connected to the pump body and electrically connected to the controller, and the motor is used to drive the pump body to work under the control of the controller;

[0009] The pressure sensor is electrically connected to the controller, and the pressure sensor is used to collect the outlet side pressure of the pump body and send the outlet side pressure to the controller;

[0010] The controller is used to adjust and control the control parameters of the motor according to the outlet side pressure, so that the outlet side pressure tends to a target value.

[0011] In an implementation manner of the present application, the controller comprises a circuit board and a connector,

[0012] The connector is exposed to the housing and electrically connected to the circuit board, and the connector is used to take power and / or obtain engine parameter information.

[0013] In one implementation of the embodiment of the present application, the controller further comprises a wire harness, and the connector is electrically connected with the circuit board via the wire harness.

[0014] The pump device further comprises a wire harness assembly, and the wire harness assembly is assembled to the housing, and the wire harness assembly has a wire hole in which the wire harness is clamped.

[0015] In one implementation of the embodiment of the present application, the pump device further comprises a mounting bracket, and the mounting bracket comprises a first plate body and a second plate body which are connected to each other and perpendicular to each other,

[0016] The first plate body is located between the pump body and the motor and is connected with the pump body and the motor respectively;

[0017] The second plate body is located between the motor and the circuit board of the controller and is connected with the circuit board and the pressure sensor respectively.

[0018] In one implementation of the embodiment of the present application, the pressure sensor is located on a side of the circuit board away from the second plate body and is electrically connected with the circuit board.

[0019] In one implementation of the embodiment of the present application, the pump device further comprises an adapter pipe and a connecting pipe,

[0020] The first end of the adapter pipe is connected to the pump body and communicates with the outlet pipe, the pressure sensor is connected to the second end of the adapter pipe via the connecting pipe, and the first end and the second end are perpendicular to each other.

[0021] In one implementation of the embodiment of the present application, the pump device further comprises a first sealing member, and the first sealing member is located between the pump body and the mounting bracket.

[0022] In one implementation of the embodiment of the present application, the pump body comprises a pump body portion, a pump cover portion, a driving gear and a driven gear,

[0023] The pump body portion and the pump cover portion are connected and form a medium cavity, and the driving gear and the driven gear are located in the medium cavity;

[0024] The driving gear is engaged with the driven gear, and the driving gear is connected with the output shaft of the motor, wherein when the driving gear is driven to rotate via the output shaft, the driven gear is driven to rotate.

[0025] In one implementation of the embodiment of the present application, the pump device further comprises a second sealing member, and the second sealing member is located between the pump body portion and the pump cover portion.

[0026] In an implementation form of the embodiment of the application, the shell is provided with an indication mark, which is used for indicating the flow direction of the liquid medium.

[0027] The technical scheme provided by the embodiment of the application has at least the following beneficial effects:

[0028] The pump device provided by the embodiment of the application collects the outlet side pressure of the pump body through the pressure sensor, and then the controller can adjust and control the control parameter of the motor according to the outlet side pressure. The motor operates under different control parameters, which will in turn affect the outlet side pressure of the pump body, so that the outlet side pressure continuously approaches the target value or is maintained near the target value, thereby realizing the closed-loop control of the outlet side pressure of the pump body. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort.

[0030] Figure 1 An exploded view of a pump device provided by the embodiment of the application is shown;

[0031] Figure 2 A structural schematic view of a pump device provided by the embodiment of the application is shown;

[0032] Figure 3 A structural schematic view of a shell of a pump device provided by the embodiment of the application is shown;

[0033] Figure 4 A structural schematic view of a shell and a wire bundling element of a pump device provided by the embodiment of the application is shown;

[0034] Figure 5 A first structural schematic view of a main body assembly of a pump device provided by the embodiment of the application is shown;

[0035] Figure 6 A second structural schematic view of a main body assembly of a pump device provided by the embodiment of the application is shown;

[0036] Figure 7 A structural schematic view of a controller of a pump device provided by the embodiment of the application is shown;

[0037] Figure 8 A structural schematic view of a pressure sensor of a pump device provided by the embodiment of the application is shown;

[0038] Figure 9A front view structural schematic diagram of a pump device provided by an embodiment of the present application is shown.

[0039] Figure 10 A front view structural schematic diagram of a pump device provided by an embodiment of the present application is shown. Figure 9 A sectional view along line A-A in the front view structural schematic diagram of the pump device is shown.

[0040] Figure 11 A front view structural schematic diagram of a pump device provided by an embodiment of the present application is shown. Figure 9 A sectional view along line B-B in the front view structural schematic diagram of the pump device is shown.

[0041] Figure 12 A front view structural schematic diagram of a pump device provided by an embodiment of the present application is shown.

[0042] Figure 13 A front view structural schematic diagram of a pump device provided by an embodiment of the present application is shown.

[0043] Figure 14 A front view structural schematic diagram of a pump device provided by an embodiment of the present application is shown. Figure 13 A sectional view along line C-C in the front view structural schematic diagram of the pump device is shown.

[0044] Reference signs:

[0045] 100, main body assembly;

[0046] 1, pump main body; 101, inlet pipe; 102, outlet pipe; 103, pump body part; 104, pump cover part; 105, driving gear; 106, driven gear; 107, driven shaft; 2, motor; 201, output shaft; 3, pressure sensor; 301, limiting wall; 4, controller; 401, circuit board; 402, connector; 403, flat cable; 5, wire bundling member; 501, threading hole; 6, mounting bracket; 601, first plate body; 602, second plate body; 7, adapter pipe; 8, connecting pipe; 9, first sealing member; 10, second sealing member; 11, indication mark;

[0047] 200, housing; 2001, first housing; 2002, second housing; 2003, pipe avoiding hole; 2004, mounting hole. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the protection scope of the present application. In order to make the technical solutions and advantages of the present application clearer, the test method, device and system of the vehicle knob gear shifting will be described in detail below with reference to the drawings.

[0049] The oil pump is an important component in the engine system, which is usually used to pump the circulating engine oil. In the related technology, the oil pump is usually driven by the crankshaft of the engine and is transmitted through a chain or a gear structure. The oil pump with the mechanical transmission structure has a complex internal structure arrangement, large space size and high weight, and the oil pressure at the outlet side of the oil pump is largely dependent on the engine speed, which is difficult to independently adjust the oil pressure and is prone to cause power waste.

[0050] In addition, the oil pump with the mechanical transmission structure has a reduced power transmission efficiency after long-term use, which may cause insufficient oil pressure; in the extreme environment such as high altitude or seabed, the change of environmental pressure will also affect the oil pressure at the outlet side of the oil pump.

[0051] To this end, the embodiment of the present application provides a pump device which can realize closed-loop control of the outlet side pressure of the pump body in full time domain and full space domain.

[0052] As shown in Figure 1 and Figure 2 The pump device provided by the embodiment of the present application comprises a main body assembly 100 and a shell 200, and the main body assembly 100 is contained in the shell 200. The main body assembly 100 comprises a pump body 1, a motor 2, a pressure sensor 3 and a controller 4.

[0053] The pump body 1 has an inlet pipe 101 and an outlet pipe 102, and the inlet end of the inlet pipe 101 and the outlet end of the outlet pipe 102 are exposed to the shell 200; the pump body 1 is used to pump the liquid medium from the inlet pipe 101 to the outlet pipe 102. The motor 2 is mechanically connected with the pump body 1 and is electrically connected with the controller 4, and the motor 2 is used to drive the pump body 1 to work under the control of the controller 4. The pressure sensor 3 is electrically connected with the controller 4, and the pressure sensor 3 is used to collect the outlet side pressure of the pump body 1 and send the outlet side pressure to the controller 4. The controller 4 is used to adjust the control parameter of the motor 2 according to the outlet side pressure, so that the outlet side pressure tends to the target value.

[0054] The pump device provided by the embodiment of the present application collects the outlet side pressure of the pump body 1 through the pressure sensor 3, and then the controller 4 can adjust the control parameter of the motor 2 according to the outlet side pressure. The motor 2 runs under different control parameters, which will in turn affect the outlet side pressure of the pump body 1, so that the outlet side pressure continuously approaches the target value or is maintained near the target value, thereby realizing the closed-loop control of the outlet side pressure of the pump body 1.

[0055] In addition, the pump device provided by the embodiment of the present application drives the pump body 1 to work through the motor 2, which is simpler in structure than the traditional pump with mechanical transmission structure, and has smaller overall size and lighter weight, which is convenient for moving and installing.

[0056] Further, the pump device provided by the embodiment of the present application has the main assembly 100 integrated in the shell 200 as a whole, which further facilitates the movement and installation of the pump device, and the shell 200 can play a role in sealing, dustproofing and vibration reduction to a certain extent, thereby improving the safety of the pump device.

[0057] In the embodiment of the present application, the control parameter for controlling the motor 2 can include a PWM (Pulse Width Modulation) control signal. In some embodiments, the control parameter can also include at least one of the rotation speed and voltage of the motor 2.

[0058] The actual working voltage of the motor 2 will affect the output performance such as the rotation speed of the motor 2, and the rotation speed of the motor 2 will affect the outlet side pressure of the pump main body 1. When the motor 2 is connected to a higher voltage, it will operate at a higher rotation speed, and when the motor 2 is connected to a lower voltage, it will operate at a lower rotation speed. Therefore, by modulating the duty cycle of the PWM control signal, the controller 4 can adjust the average working voltage of the motor 2, and thereby adjust the rotation speed of the motor 2 and the outlet side pressure of the pump main body 1.

[0059] For example, when the motor 2 is connected to a 12V power supply, the motor 2 will rotate at full speed; if the duty cycle of the PWM control signal is adjusted to 2 / 3, the average working voltage of the motor 2 will decrease to 8V, and thereby the motor 2 will operate at 2 / 3 of the full speed.

[0060] In the embodiment of the present application, the target value can be constant or dynamically adjusted. For example, when the carrier (such as a drone) of the pump device works in an environment with large changes in environmental pressure, it can be necessary to maintain the outlet side pressure of the pump main body 1 at a constant value. Alternatively, for vehicles and other carriers with different working conditions, it can be necessary to adjust the outlet side pressure of the pump main body 1 in real time according to the rotation speed and load of the engine. In the embodiment of the present application, the target value can be determined according to at least one of the working condition of the carrier of the pump device and / or the engine parameter.

[0061] In the embodiment of the present application, the motor 2 can be a brushless motor, and the brushless motor can be a high-speed motor. Compared with a brushed motor, the brushless motor has higher reliability and power density, and the pump device provided by the embodiment of the present application can meet the special requirements of multi-power field applications. In addition, compared with a brushed motor, the brushless motor has smaller size and lighter weight, which is helpful for conveniently moving and installing the pump device.

[0062] The pump device provided by the embodiment of the present application has strong versatility and can be extended to be applied to pump body units of different liquid media, such as low-pressure electric oil pumps, electric motor oil pumps, etc. The liquid medium can be fuel, oil or water, etc.

[0063] In addition, unlike most pump devices designed for ground vehicles, the pump device provided by the embodiments of the present application has a small overall size and light weight, the outlet side pressure of the pump body 1 can be controlled in real time, and can also be applied to different liquid media. The pump device can be applied to various special scenarios such as ground unmanned power, small unmanned aerial vehicles, emergency rescue, range extenders of new energy vehicles, and the like.

[0064] In order to facilitate the installation of the inlet pipe 101 and the outlet pipe 102 and prevent them from being connected in reverse, as shown in Figure 2 , the housing 200 can have an indication mark 11 for indicating the flow direction of the liquid medium.

[0065] In the embodiments of the present application, as shown in Figure 1 and Figure 2 , the housing 200 can be in the shape of a cuboid as a whole, and the housing 200 can include a first housing 2001 and a second housing 2002. The first housing 2001 and the second housing 2002 are connected (for example, can be fixed together by screws) and form a containing cavity, and the main body assembly 100 can be contained in the containing cavity as a whole.

[0066] The side opposite to the first housing 2001 and the second housing 2002 can be provided with a pipe avoiding hole 2003, and the inlet pipe 101 and the outlet pipe 102 can extend to the outside of the housing 200 through the pipe avoiding hole 2003 to facilitate communication with the oil conveying pipeline outside.

[0067] As shown in Figure 2 and Figure 3 , the inlet pipe 101 and the outlet pipe 102 can be arranged side by side along the height direction of the housing 200; correspondingly, the pipe avoiding hole 2003 can be a strip-shaped hole extending along the height direction of the housing 200. And the pipe avoiding hole 2003 can be located at the central part of the first housing 2001, so that the inlet pipe 101 and the outlet pipe 102 can be arranged along the central axis of the housing 200, which helps to reduce the overall size of the pump device.

[0068] In the embodiments of the present application, the inlet pipe 101 and the outlet pipe 102 can adopt a self-locking structure to facilitate quick connection with the oil channel in the pump body 1.

[0069] Exemplarily, the inlet pipe 101 and the outlet pipe 102 adopt a pipe structure, one end of which (hereinafter referred to as an interface end) connected with the pump body 1 can have external threads, and the oil passage of the pump body 1 can correspondingly have internal threads, so that quick sealing can be achieved by screwing the interface end with the pump body 1. In addition, the end of the interface end can have a deformable structure, for example, can be a spring. The inner wall of the oil passage of the pump body 1 can be provided with an annular limiting groove. When the interface end is initially inserted into the oil passage and moves in the oil passage by rotating, the deformable structure can be in a compressed state; when the interface end moves to the position where the deformable structure cooperates with the annular limiting groove, the deformable structure can recover from the compressed state to a free state, so that the deformable structure is difficult to be pulled out of the limiting groove, and thus the self-locking of the pipe can be achieved through the cooperation of the deformable structure and the limiting groove.

[0070] In some embodiments, the deformable structure and the limiting cavity can have corresponding guide surfaces, respectively, so as to facilitate the sliding of the deformable structure into or out of the limiting groove.

[0071] Further, the pipe structure adopted by the inlet pipe 101 and the outlet pipe 102 can also have an unlocking member, by which the deformable structure can be pulled out of the limiting groove.

[0072] Optionally, as shown in Figure 1 and Figure 2 , the controller 4 can include a circuit board 401 and a connector 402, the connector 402 can be exposed to the shell 200 and electrically connected with the circuit board 401, and the connector 402 can be used to take power and / or obtain engine parameter information.

[0073] In the embodiments of the present application, when the pump device is used alone, for example, in an emergency rescue scene, the pump device can be directly connected to a power source through the connector 402 to realize power taking. The pump device provided in the embodiments of the present application is adapted to be connected to a 12V power source. When the pump device is used in an engine system, the connector 402 can be connected to an ECU (Electronic Control Unit) to obtain parameter information such as load and speed of the engine, and then adjust the outlet side pressure of the pump body 1 according to the parameter information.

[0074] In some embodiments, the controller 4 can determine a target value of the outlet side pressure corresponding to the current engine parameter information according to a corresponding relationship between the engine parameter information and the outlet side pressure, and then adjust the control parameter of the motor 2. The corresponding relationship can be issued by the ECU to the controller, or can be stored in the controller 4 itself.

[0075] Optionally, as shown in Figure 1 and Figure 2As shown, the controller 4 can further include a wire harness 403, and the connector 402 can be electrically connected with the circuit board 401 via the wire harness 403. The wire harness 403 can increase the distance between the circuit board 401 and the connector 402, thereby allowing the connector 402 to be exposed from the housing 200.

[0076] Further optionally, as shown in Figure 1 and Figure 4 , the pump device can further include a wire harness 5, the wire harness 5 is assembled to the housing 200, and the wire harness 5 can have a wire hole 501, and the wire harness 403 is clamped in the wire hole 501.

[0077] In the embodiments of the present application, as shown in Figure 1 , the second housing 2002 can have a mounting hole 2004, and the wire harness 5 can be fixed in the mounting hole 2004. Exemplarily, the wire harness 5 can be made of flexible material, and when the wire harness 403 is fixed in place in the wire hole 501, the wire harness 5 can be assembled into the mounting hole 2004. The position of the wire harness 5 is fixed by the interference fit between the wire harness 5 and the mounting hole 2004.

[0078] The wire harness 5 can be generally cylindrical and can include a first part and a second part, wherein the first part can be generally plate-shaped, and the second part can be generally cylindrical. The wire hole 501 can be formed on the second part.

[0079] The first part and the second part can be rotatably connected or detachably connected. When assembling, the first part and the second part are first separated or completely separated, and the wire harness 403 is placed in the wire hole 501, and then the first part is assembled to the second part, so as to clamp the wire harness 403, and then the wire harness 5 assembled with the wire harness 403 is assembled to the mounting hole 2004.

[0080] In some embodiments, the wire harness 403 can also be used to electrically connect with the motor 2. Exemplarily, the motor 2 can have a terminal, and the wire harness 403 can be electrically connected with the terminal.

[0081] Optionally, as shown in Figure 1 , Figure 5 and Figure 6 , the pump device can further include a mounting bracket 6, and the mounting bracket 6 can include a first plate body 601 and a second plate body 602 which are connected with each other and perpendicular. Wherein, the first plate body 601 can be located between the pump body 1 and the motor 2, and connected with the pump body 1 and the motor 2 respectively; the second plate body 602 can be located between the motor 2 and the circuit board 401 of the controller 4, and connected with the circuit board 401 and the pressure sensor 3 respectively.

[0082] In the embodiments of the present application, the motor 2 and the first plate body 601 can be fixed together through a screw (for example, an internal hexagonal countersunk screw). In addition, the mounting bracket 6 can be provided with a counterbore, and the screw can be installed in the counterbore to avoid the screw from protruding beyond the joint surface of the mounting bracket 6 close to the pump body 1.

[0083] As shown in Figure 1 , the pump body 1, the first plate body 601 and the motor 2 can be sequentially arranged along the length direction of the shell 200 to reduce the overall size of the pump device.

[0084] Alternatively, as shown in Figure 1 , Figure 5 and Figure 6 , the pressure sensor 3 can be located on the side of the circuit board 401 away from the second plate body 602 and electrically connected with the circuit board 401.

[0085] In the embodiments of the present application, as shown in Figure 6 , Figure 7 and Figure 8 , mounting holes can be formed on the pressure sensor 3 and the circuit board 401, and the screw can pass through the mounting holes on the pressure sensor 3 and the circuit board 401 in sequence to be fixed to the second plate body 602. The pressure sensor 3, the circuit board 401 and the second plate body 602 can be sequentially arranged along the width direction of the shell 200 to reduce the overall size of the pump device.

[0086] Further, as shown in Figure 8 , the pressure sensor 3 can have a limiting wall 301 extending in a direction perpendicular to the circuit board 401. In addition, the limiting wall 301 can be arc-shaped as a whole to be adapted to the rod portion of the screw, thereby improving the stability of the screw fixation.

[0087] In the embodiments of the present application, the pressure sensor 3 can be a single inlet structure, the monitored pressure is gauge pressure, and the structural mode is a piezoelectric structure. That is, as shown in Figure 8 , the pressure sensor 3 can have only one liquid medium inlet, the pressure of the liquid medium is detected through an instrument type sensing device, and the pressure signal can be converted into an electric signal through a piezoelectric structure, and then the electric signal can be sent to the controller 4 through a wire.

[0088] In the embodiments of the present application, as shown in Figure 5 and Figure 6 , the motor 2 can be located on the first side (inner side) of the second plate body 602, and the circuit board 401 and the pressure sensor 3 can be located on the second side (outer side) of the second plate body 602, the first side being opposite to the second side. In this way, the circuit board 401 and the pressure sensor 3 can avoid affecting the operation of the motor 2, and the installation space can be saved to reduce the overall size of the pump device.

[0089] The second plate body 602 can be provided with a relief groove penetrating along the thickness direction of the second plate body 602, so as to allow the wire 403 to pass through the relief groove and extend to the first side of the second plate body 602 to be electrically connected with the motor 2.

[0090] To facilitate the pressure sensor 3 to detect the pressure of the liquid medium, the pump device can further include an adapter pipe 7 and a connecting pipe 8, as shown in Figure 1 and Figure 6 , wherein the first end of the adapter pipe 7 can be connected to the pump body 1 and communicate with the outlet pipe 102, and the pressure sensor 3 can be connected to the second end of the adapter pipe 7 through the connecting pipe 8, and the first end of the adapter pipe 7 can be perpendicular to the second end.

[0091] In the embodiments of the present application, as shown in Figure 1 , the adapter pipe 7 can be a T-shaped adapter. Specifically, the adapter pipe 7 can include a first straight pipe portion, a second straight pipe portion and an elbow pipe portion, wherein the elbow pipe portion can be connected between the first straight pipe portion and the second straight pipe portion. The inlet end of the first straight pipe portion can communicate with the pump body 1 as the first end of the adapter pipe 7, and the outlet end of the second straight pipe portion can communicate with the connecting pipe 8 as the second end of the adapter pipe 7.

[0092] The first end of the adapter pipe 7 is threadedly connected with the pump body 1 to realize sealing and fixing. As shown in Figure 6 , a one-letter-shaped groove can be provided on the outer wall of the elbow pipe portion to facilitate the rotation of the adapter pipe 7. In other embodiments, the one-letter-shaped groove can be replaced by a cross-shaped groove.

[0093] Optionally, as shown in Figure 11 , the pump device can further include a first sealing member 9 located between the pump body 1 and the mounting bracket 6.

[0094] In the embodiments of the present application, as shown in Figure 11 , the pump body 1 and the mounting bracket 6 can be provided with accommodating grooves to allow the output shaft 201 of the motor 2 to rotate. The first sealing member 9 can be sleeved on the output shaft 201 to prevent the liquid medium in the pump body 1 from entering the motor 2 through the accommodating grooves. The side of the pump body 1 close to the mounting bracket 6 can be provided with a clamping groove for accommodating the first sealing member 9. To improve the oil sealing effect, the first sealing member 9 can adopt a flooding seal.

[0095] In the embodiments of the present application, the pump body 1 can adopt a gear pump. Optionally, as shown in Figure 1 , Figure 10 and Figure 11As shown, the pump body 1 can include a pump body part 103, a pump cover part 104, a driving gear 105 and a driven gear 106. The pump body part 103 and the pump cover part 104 are connected and form a medium cavity, and the driving gear 105 and the driven gear 106 can be located in the medium cavity.

[0096] The driving gear 105 is engaged with the driven gear 106, and the driving gear 105 can be connected with the output shaft 201 of the motor 2. When the driving gear 105 drives the output shaft 201 to rotate, the driven gear 106 is driven to rotate.

[0097] In the embodiment, the driving gear 105 and the driven gear 106 have the same number of teeth and the same module, so that the transmission ratio of the driving gear 105 and the driven gear 106 is 1:1. In addition, the driving gear 105 and the driven gear 106 can both be planar gears to improve the reliability of the engagement.

[0098] The inlet pipeline 101 and the outlet pipeline 102 can be connected to the pump cover part 104, and the pump cover part 104 can be fixedly connected to the shell 200 by screws. The inside of the pump cover part 104 can be provided with an oil passage in communication with the outlet pipeline 102, and the adapter pipeline 7 can be connected to the pump cover part 104 and in communication with the oil passage in the inner wall of the pump cover part 104, so as to facilitate the outlet side pressure detection by the pressure sensor 3.

[0099] The pump body part 103, the pump cover part 104 and the mounting bracket 6 can be positioned by a positioning pin, and the positioning pin can be in transition fit with the above three.

[0100] In the embodiment, the output shaft 201 of the motor 2 matches the shape of the center hole of the driving gear 105, so that the driving gear 105 can be driven to rotate by the output shaft 201. For example, as shown in Figure 12 The output shaft 201 of the motor 2 can be a D-shaped shaft, and correspondingly, the center hole of the driving gear 105 can also be a D-shaped hole with the same size.

[0101] In other embodiments, the output shaft 201 and the center hole of the driving gear 105 can also have other shapes, for example, star shape, or the output shaft 201 and the center hole of the driving gear 105 can both be circular and in interference fit.

[0102] Optionally, as shown in Figure 14 The pump body 1 can further include a driven shaft 107, the driven shaft 107 can be located in the pump body part 103, the driven gear 106 is sleeved on the driven shaft 107, and the driven gear 106 can rotate relative to the driven shaft 107.

[0103] In the embodiments of the present application, the driven shaft 107 can be in interference fit with the pump body part 103 to fix the position of the driven shaft 107. The central hole of the driven gear 106 can be concentric with the driven shaft 107 and in clearance fit so that the driven gear 106 can rotate relative to the driven shaft 107.

[0104] Optionally, as shown in Figure 1 , Figure 10 and Figure 11 , the pump device can further comprise a second seal 10 between the pump body part 103 and the pump cover part 104.

[0105] In the embodiments of the present application, the second seal 10 can be an annular member, and the second seal 10 can surround the medium cavity, and the size of the second seal 10 can be greater than the size of the medium cavity.

[0106] The second seal 10 can be mounted on the pump body part 103, and the pump cover part 104 can be provided with a clamping groove to accommodate the second seal 10. The material of the second seal 10 can be fluororubber, which has better high and low temperature resistance.

[0107] In the present application, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance. The term "a plurality of" refers to two or more, unless otherwise explicitly limited.

[0108] Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. The application is intended to cover any variations, uses or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice in the art to which the application pertains. The specification and examples are to be regarded as illustrative only.

[0109] It should be understood that the present application is not limited to the precise structures described herein and illustrated in the drawings and that various modifications and changes can be made without departing from the scope thereof. The scope of the present application is limited only by the claims appended hereto.

Claims

1. A pump device, characterized by The pump device comprises a main body assembly (100) and a shell (200), the main body assembly (100) is contained in the shell (200); The main body assembly (100) comprises a pump body (1), a motor (2), a pressure sensor (3) and a controller (4), The pump body (1) has an inlet pipe (101) and an outlet pipe (102), the inlet end of the inlet pipe (101) and the outlet end of the outlet pipe (102) are exposed to the shell (200), and the pump body (1) is used for pumping liquid medium from the inlet pipe (101) to the outlet pipe (102); The motor (2) is mechanically connected with the pump body (1) and electrically connected with the controller (4), and the motor (2) is used for driving the pump body (1) to work under the control of the controller (4); The pressure sensor (3) is electrically connected with the controller (4), and the pressure sensor (3) is used for collecting the outlet side pressure of the pump body (1) and sending the outlet side pressure to the controller (4); The controller (4) is used for adjusting and controlling the control parameters of the motor (2) according to the outlet side pressure, so that the outlet side pressure tends to a target value; The controller (4) comprises a circuit board (401) and a connector (402), The connector (402) is exposed to the shell (200) and is electrically connected with the circuit board (401), and the connector (402) is used for power taking and / or engine parameter information acquisition; The controller (4) further comprises a flat cable (403), and the connector (402) is electrically connected with the circuit board (401) via the flat cable (403); The pump device further comprises a cable binding member (5), the cable binding member (5) is assembled to the shell (200), and the cable binding member (5) has a cable passing hole (501), and the flat cable (403) is clamped in the cable passing hole (501); The pump device further comprises a mounting bracket (6), the mounting bracket (6) comprises a first plate body (601) and a second plate body (602) which are connected with each other and perpendicular to each other, The first plate body (601) is located between the pump body (1) and the motor (2), and is connected with the pump body (1) and the motor (2) respectively; The second plate body (602) is located between the motor (2) and the circuit board (401) of the controller (4), and is connected with the circuit board (401) and the pressure sensor (3) respectively; The motor (2) is located on a first side of the second plate body (602), the circuit board (401) and the pressure sensor (3) are located on a second side of the second plate body (602), and the first side is opposite to the second side; The flat cable (403) passes through the second plate body (602) and is electrically connected with the motor (2); The shell (200) comprises a mounting hole (2004) located on the side of the motor (2) away from the first plate body (601), and the beam member (5) is fixed in the mounting hole (2004).

2. The pump device of claim 1, wherein The pump device further comprises a connecting pipe (7) and a connecting pipe (8), The first end of the connecting pipe (7) is connected to the pump body (1) and communicates with the outlet pipe (102), the pressure sensor (3) is connected to the second end of the connecting pipe (7) via the connecting pipe (8), and the first end and the second end are perpendicular to each other.

3. The pump apparatus of claim 1, wherein The pump device further comprises a first sealing member (9) located between the pump body (1) and the mounting bracket (6).

4. The pump apparatus of claim 1, wherein The pump body (1) comprises a pump body portion (103), a pump cover portion (104), a driving gear (105) and a driven gear (106), The pump body portion (103) and the pump cover portion (104) are connected and form a medium cavity, and the driving gear (105) and the driven gear (106) are located in the medium cavity; The driving gear (105) is engaged with the driven gear (106), and the driving gear (105) is connected with the output shaft (201) of the motor (2), wherein when the driving gear (105) is driven to rotate via the output shaft (201), the driven gear (106) is driven to rotate.

5. The pump apparatus of claim 4, wherein, The pump device further comprises a second sealing member (10) located between the pump body portion (103) and the pump cover portion (104).

6. The pump apparatus of claim 1, wherein The shell (200) has an indication mark (11) for indicating the flow direction of the liquid medium.

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