Quick assembly type pneumatic lumbar support pump valve integrated machine and assembly method

Abstract

The present invention relates to a quick-assembly type pneumatic lumbar support pump-valve integrated machine and assembly method, the integrated machine comprises a pump body, an EMC circuit board, a solenoid valve, a control circuit board, a head end cover, and a tail end cover; wherein, the pump cover on the pump body is provided with an air outlet socket and a positioning slot of the control circuit board at one end in contact with the solenoid valve, the welding assembly of the control circuit board and the solenoid valve is plugged into the pump cover, the air inlet end of the solenoid valve is inserted into the air outlet socket of the pump cover, and is airtightly engaged with the air outlet socket, and the control circuit board is plugged into the positioning slot of the pump cover; the root of the air pipe quick plug connector of the solenoid valve is provided with an elastic O-ring, the control circuit board is inserted into the wiring harness plug jack of the head end cover, and the air outlet end of the solenoid valve is connected to the head end cover by the elastic O-ring, and the head end cover is connected to the pump cover. Its structure is simpler and assembly is easier, and the overall size can still be small and the noise is low when the flow rate is 7L, meeting the customer's needs for low noise and fast inflation.

Description

Technical Field

[0001] The invention belongs to the technical field of pump-valve integrated machines, and in particular relates to a quick-assembly type pump-valve integrated machine for a pneumatic lumbar support and an assembly method. Background Art

[0002] Pneumatic lumbar supports are usually installed on existing high-end car seats. The air pump and air valve used in the pneumatic lumbar support, as the core components of the entire pneumatic lumbar support, have always attracted much attention. The air pump and air valve used in traditional pneumatic lumbar supports are in a separate form, and due to many disadvantages, they were quickly eliminated. Now the air pump and air valve used in pneumatic lumbar supports are both integrated pump-valve structures.

[0003] Although there are many types of pump-valve integrated machines for inflating pneumatic lumbar supports, they have disadvantages such as large external structure and size, complex structure, small flow rate, high noise, and cumbersome assembly process. For example, the "pump-valve integrated machine for pneumatic lumbar support for automobile seats" disclosed in Chinese patent CN 210068424 U involves too many parts in the assembly process of the pump and valve, and the circuit board of the valve needs to be connected and fixed with bolts and support columns. Its structure is complex and the assembly process is cumbersome. In addition, in order to ensure the compact size of the machine body, the flow rate of the pump can only be controlled below 5L, which cannot meet the customer's demand for fast inflation; in addition, the solenoid valve of this structure is only fixed at the bottom, which cannot ensure the firmness of the installation, and it is easy to generate noise during operation, which cannot meet the customer's demand for low noise; furthermore, the shell of this structure is an injection molded part, which is easy to deform. After long-term use, the speed limit plug cannot be inserted into the pump-valve integrated machine, or the insertion force does not meet the customer's requirements. Summary of the invention

[0004] The purpose of the present invention is to provide a quick-assembly pneumatic lumbar support pump-valve integrated machine which has a simpler structure, is easier to assemble, can still ensure a small overall size when the flow rate is 7L, and meets the customer's needs for low noise and fast inflation.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] A quick-assembly pneumatic lumbar support pump-valve integrated machine comprises a pump body, an EMC circuit board, a solenoid valve, a control circuit board, a head end cover and a tail end cover; wherein, the end of the pump cover on the pump body that contacts the solenoid valve is provided with an air outlet socket and a positioning slot of the control circuit board, the welded assembly of the control circuit board and the solenoid valve is plugged into the pump cover, the air inlet end of the solenoid valve is inserted into the air outlet socket of the pump cover and is airtightly engaged with the air outlet socket, and the control circuit board is plugged into the positioning slot of the pump cover; an elastic O-ring is provided at the root of the air pipe quick-connect connector of the solenoid valve, the control circuit board is inserted into the wiring harness plug jack of the head end cover, the air outlet end of the solenoid valve is snap-fitted with the head end cover through the elastic O-ring, and the head end cover is snap-fitted with the pump cover.

[0007] As a preferred embodiment of the present invention, two air outlet sockets are arranged on the pump cover of the pump body, and a positioning slot is arranged at a position of the pump cover opposite to the control circuit board, and the positioning slot is composed of two transverse reinforcing ribs arranged at intervals. A pressure relief valve is arranged on the pump cover, and a retaining spring slot is processed on the side wall of the pump cover, and the pump cover is connected to the pump body through the retaining spring; the pump cover is processed with a square retaining nose on any group of two opposite side walls, and the pump cover is connected to the head end cover through the square retaining nose.

[0008] As a preferred embodiment of the present invention, the solenoid valve itself has an exhaust and silencer structure, one end of the solenoid valve is provided with an air inlet plug, and the other end is provided with an air pipe quick connector, a circle of grooves is processed on the outer wall of the air inlet plug in the circumferential direction, an O-ring is installed in the groove, the air inlet plug of the solenoid valve is inserted into the air outlet socket of the pump cover, and the two are connected by an O-ring; the air inlet plug is the air inlet end of the solenoid valve, and the air pipe quick connector is the air outlet end of the solenoid valve, the air pipe quick connector is arranged in a cylindrical socket on the upper part of the head end cover, and is used to connect with the air pipe of the pneumatic lumbar support, and the solenoid valve is near the bottom of the air pipe quick connector. An O-ring is installed at the position, and the O-ring is used to adjust the gap between the solenoid valve outlet end and the head end cover, so that the solenoid valve outlet end is clamped on the head end cover; a positioning column is processed on the valve body of the solenoid valve at a position opposite to the positioning hole of the control circuit board, and two first PIN needles are also inlaid on the valve body. One end of the two first PIN needles is welded to the enameled wire wrapped around the valve body, and the other end passes through the control circuit board and is welded together with the control circuit board. The control circuit board is plugged into the solenoid valve through the positioning column and is welded together through the pins of the two first PIN needles; the solenoid valve is also provided with silencer cotton at a position close to the air outlet end.

[0009] As a preferred embodiment of the present invention, the inner side wall of the head end cover is processed with a square card window at a position close to the opening end and opposite to the square card nose of the pump cover, and the square card nose is card-engaged with the square card window; the inner side wall of the head end cover is provided with a circle of bosses at a position close to the square card window, and the bosses are used for card-engaging and limiting; the head end cover is respectively processed with circuit board guide grooves on the two inner side walls opposite to the control circuit board; the top surface of the head end cover is provided with a cylindrical socket at a position opposite to the air pipe joint of the solenoid valve, and the cylindrical socket It is connected to the interior of the head end cover, and a notch is opened on the outside of the cylindrical socket. A solenoid valve slot is processed around the circumference of the bottom of the cylindrical socket. The root of the solenoid valve outlet end is clamped in the solenoid valve slot of the head end cover under the action of the O-ring, and the air pipe quick-connect connector of the solenoid valve passes through the solenoid valve slot and is arranged in the cylindrical socket; a square wiring harness plug socket is processed on the outside of the head end cover, and a long strip opening is processed in the wiring harness plug socket at a position opposite to the second PIN pin of the control circuit board, and the long strip opening is a chamfered slope structure.

[0010] As a preferred embodiment of the present invention, the tail end cover is a cylindrical structure that matches the tail of the motor of the pump body, and a protrusion is arranged inside the tail end cover at the axial position. The protrusion passes through the EMC circuit board of the pump body and is pressed against the tail end face of the motor. A plurality of interference fit blocks are evenly spaced along the circumferential direction on the inner side wall of the tail end cover, and the tail end cover is inserted into the outer casing of the motor of the pump body and has an interference fit with the motor outer casing.

[0011] As a further preferred embodiment of the present invention, the appearance of the trachea quick-plug connector is a barbed quick-plug structure, and the diameter of the air outlet of the trachea quick-plug connector is 2.5 mm.

[0012] As a further preferred embodiment of the present invention, the outer side wall of the wiring harness plug jack on the head end cover is a sunken structure, a plurality of right-angle reinforcing ribs are arranged at the sunken position, and the right-angle ends of the right-angle reinforcing ribs are connected to the square wiring harness plug jack.

[0013] As a further preferred embodiment of the present invention, the circuit board guide groove is formed by combining two reinforcing ribs arranged at intervals.

[0014] As a further preferred embodiment of the present invention, a protrusion is provided on the EMC circuit board, the wire is welded on the protrusion of the EMC circuit board, the tail end cover is processed with a gas avoidance groove at a position opposite to the protrusion of the EMC circuit board, and the part where the gas avoidance groove contacts the protrusion is a structure conforming to the gas avoidance groove.

[0015] Another object of the present invention is to provide a method for assembling a quick-assembly pneumatic lumbar support pump-valve integrated machine, the method comprising the following steps:

[0016] Step S1, welding the EMC circuit board to the tail of the pump body; wherein the EMC circuit board is provided with a protrusion;

[0017] Step S2, welding the control circuit board with the plug pin and two wires and the solenoid valve into an assembly; wherein, an air inlet plug is provided at one end of the solenoid valve, and an air pipe quick-connect connector is provided at the other end, a circle of grooves is processed along the circumferential direction on the outer wall of the air inlet plug, an O-ring is installed in the groove, and the shape of the air pipe quick-connect connector is processed into a barbed quick-connect structure; the solenoid valve is installed with an O-ring at a position close to the bottom of the air pipe quick-connect connector, a positioning column is processed on the valve body of the solenoid valve at a position opposite to the positioning hole of the control circuit board, and two first PIN needles are also inlaid on the valve body, one end of the two first PIN needles is welded to the enameled wire wrapped around the valve body, and the other end passes through the control circuit board and is welded to the control circuit board, the control circuit board is plugged into the solenoid valve through the positioning column, and the pins of the two first PIN needles are welded together to form an assembly;

[0018] Step S3, inserting the solenoid valve air inlet plug into the air outlet socket of the pump cover, and plugging the control circuit board into the positioning slot of the pump cover;

[0019] Step S4, insert the control circuit board along the circuit board guide groove inside the head end cover, and clamp the head end cover and the pump cover together; at this time, the root of the solenoid valve outlet end is clamped in the solenoid valve clamping groove of the head end cover under the action of the O-ring, the air pipe quick plug connector of the solenoid valve passes through the solenoid valve clamping groove and is arranged in the cylindrical socket, and the second PIN needle of the control circuit board passes through the long strip opening of the head end cover and is exposed outside;

[0020] Step S5, welding the wires on the control circuit board and the tail EMC circuit board together;

[0021] Step S6, insert the tail end cover into the tail of the pump body to complete the assembly; wherein, the tail end cover is a cylindrical structure that matches the tail of the motor of the pump body, a protrusion is arranged inside the tail end cover at the axial position, the protrusion passes through the EMC circuit board and is pressed against the tail end face of the motor, a plurality of interference fit blocks are arranged on the inner side wall of the tail end cover at intervals evenly distributed along the circumferential direction, the tail end cover is plugged into the outer casing of the pump body motor and has an interference fit with the motor outer casing; the tail end cover is processed with an air avoidance groove at a position opposite to the protrusion of the EMC circuit board, and the wires of the EMC circuit board are led out from the air avoidance groove.

[0022] Advantages and beneficial effects of the present invention:

[0023] (1) The pump-valve integrated machine provided by the present invention improves the overall structure of the pump cover, the appearance structure of the solenoid valve, the head end cover, and the tail end cover, as well as the assembly method of each component, so that fewer components are used for assembly and the structure is simpler. After assembly, the pump-valve integrated machine can still ensure a small overall size and low noise when the flow rate is 7L, thus meeting the customer's needs for low noise and fast inflation.

[0024] (2) The connection method of the various components in the assembly process of the pump-valve integrated machine provided by the present invention is mainly fixed by snap-fitting. The entire assembly process does not require the use of bolts and other parts, and the assembly process is simpler. The research and development of the pump-valve integrated machine can greatly improve the production efficiency of the pump-valve integrated machine.

[0025] (3) The solenoid valve in the pump-valve integrated machine provided by the present invention is fixed at both ends, and the gap between the air outlet end of the solenoid valve and the head end cover is adjusted by an O-ring, so that the air outlet end of the solenoid valve can be snapped onto the head end cover, ensuring the firmness of the assembly while preventing dimensional deviation, making assembly more convenient.

[0026] (4) The side wall of the socket of the wiring harness plug on the head end cover provided by the present invention is a sunken structure, and a plurality of right-angle reinforcing ribs are arranged at the sunken position to prevent injection molding deformation, thereby solving the problem that the wiring harness plug cannot be inserted or the insertion force does not meet customer requirements.

[0027] (5) Two circuit board guide grooves are provided inside the head end cover of the present invention. The provision of the guide grooves can smoothly guide the plugging of the control circuit board and ensure that the wiring harness pin (second PIN pin) is accurately inserted into the long strip opening on the head end cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 This is the overall axonometric view of the pump-valve integrated machine of Example 1;

[0030] Figure 2 This is an assembly diagram of the pump-valve integrated machine of Example 1;

[0031] Figure 3 This is an exploded view of the pump-valve integrated machine of Example 1;

[0032] Figure 4 This is a schematic diagram of the connection between the pump body and the pump cover of Example 1;

[0033] Figure 5 It is the overall axonometric view of the pump cover in Example 1;

[0034] Figure 6 This is a schematic diagram of the appearance structure of the solenoid valve in Example 1;

[0035] Figure 7 This is a schematic diagram of the assembly of the control circuit board and the solenoid valve in Example 1;

[0036] Figure 8 The overall axonometric measurement of the head end cover in Example 1 Figure 1 ;

[0037] Fig. 9 The overall axonometric measurement of the head end cover in Example 1 Figure 2 ;

[0038] Fig.10 The overall axonometric measurement of the head end cover in Example 1 Figure 3 ;

[0039] Fig.11 This is an overall axonometric view of the tail end cover in Example 1.

[0040] The accompanying drawings are marked as follows: pump body 1, EMC circuit board 2, solenoid valve 3, control circuit board 4, head end cover 5, tail end cover 6, motor 11, pump head 12, pump cover 13, wire 14, protrusion 21, air inlet plug 31, trachea quick connector 32, O-ring 33, positioning column 34, first PIN needle 35, O-ring 36, silencer cotton 37, second PIN needle 41, square card window 51, circuit board guide groove 52, cylindrical jack 53, solenoid valve slot 54, wiring harness plug jack 55, long strip mouth 56, boss 57, reinforcement rib 58, protrusion 61, interference fit block 62, avoidance groove 63, air outlet socket 131, positioning slot 132, pressure relief valve 133, retaining spring slot 134, square card nose 135, vertical reinforcement rib 521, notch 531, transverse reinforcement rib 1321. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0042] In the description of this application, it should be noted that the terms "inside", "below", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] Example 1

[0045] like Figures 1 to 3As shown, the present invention provides a quick-assembly pneumatic lumbar support pump-valve integrated machine, including a pump body 1, an EMC circuit board 2, a solenoid valve 3, a control circuit board 4, a head end cover 5, and a tail end cover 6; wherein, the pump cover 13 on the pump body 1 is provided with an air outlet socket 131 and a positioning card slot 132 of the control circuit board at one end in contact with the solenoid valve 3, the solenoid valve 3 itself has an exhaust and silencer structure, and the welded assembly of the control circuit board 4 and the solenoid valve 3 is plugged into the pump cover 13. The air inlet end of the solenoid valve 3 is inserted into the air outlet socket 131 of the pump cover and is airtightly connected with the air outlet socket. The control circuit board 4 is plugged into the positioning slot 132 of the pump cover. An elastic O-ring 33 is provided at the root of the air pipe quick connector of the solenoid valve 3. The control circuit board is inserted into the wiring harness plug jack 55 of the head end cover 5 along the circuit board guide groove 52 on the side wall of the head end cover. The air outlet end of the solenoid valve is snap-fitted with the head end cover through the elastic O-ring, and the head end cover 5 is snap-fitted with the pump cover 13.

[0046] It should be noted that the pump body provided in this embodiment can directly adopt any commercially available pump body that can provide a large flow rate. The pump body used in this embodiment is a pump body with model number 580BFYT sold by Shenzhen JiChuangxing Technology Co., Ltd., which is provided with a vertical pressure relief valve and two air outlets. The pump body provided in this embodiment is only used for illustration and is not used to limit the pump body structure.

[0047] Further, if Figure 4 As shown, the pump body 1 provided in this embodiment includes a motor 11, a pump head 12, and a pump cover 13; wherein, an EMC circuit board 2 is installed at the tail end of the motor 11; one end of the pump head 12 is connected to the motor 11, and the other end is connected to the pump cover 13; the EMC circuit board 2 is connected to the control circuit board 4 through a wire 14.

[0048] like Figure 5 As shown, in order to realize the connection between the pump cover 13 and the pump head 12 and the welding assembly of the control circuit board and the solenoid valve, the pump cover 13 of the pump body provided in this embodiment is provided with two air outlet sockets 131, and the pump cover 13 is provided with a positioning slot 132 at a position opposite to the control circuit board 4, the positioning slot 132 plays a role of assisting in positioning the control circuit board 4, and the positioning slot 132 is composed of two transverse reinforcing ribs 1321 arranged at intervals; a pressure relief valve 133 is provided on the pump cover 13, and a silencer structure for noise reduction is arranged in the pressure relief valve 133; the four side walls of the pump cover 13 are processed with retaining spring retaining grooves 134, and the pump cover 13 is connected to the pump head 12 through four retaining springs; the pump cover 13 is processed with a square retaining nose 135 on any group of two opposite side walls; the square retaining nose 135 is close to the retaining spring retaining groove 134, and is arranged on both sides of the retaining spring retaining groove 134, and the pump cover 13 is connected to the head end cover 5 through the square retaining nose 135.

[0049] like Figures 1 to 3 , Figure 7 As shown, the control circuit board 4 and the solenoid valve 3 described in this embodiment are welded and assembled together, and the assembly is installed on the pump cover 13 and the head end cover 5. In order to enable the assembly to be quickly assembled between the pump cover 13 and the head end cover 5, and at the same time realize the rapid assembly between the control circuit board 4 and the solenoid valve 3, this embodiment adopts any commercially available solenoid valve that can match the pump body, and then improves the appearance structure of the solenoid valve 3 to achieve the above purpose.

[0050] It should be noted that the solenoid valve used in this embodiment is sold by Huaian Huayuan Hydraulic Machinery Co., Ltd. The solenoid valve is provided only for illustration and is not used to limit the pump body structure.

[0051] Further, if Figure 6 , Figure 7 As shown, one end of the solenoid valve 3 is provided with an air inlet plug 31, and the other end is provided with an air pipe quick connector 32. A circle of grooves are processed on the outer wall of the air inlet plug 31 along the circumferential direction, and an O-type sealing ring 36 is installed in the groove. The air inlet plug of the solenoid valve is inserted into the air outlet socket of the pump cover, and the two are connected with an O-type sealing ring. The O-type sealing ring plays a sealing role to prevent air leakage. The air inlet plug 31 is the air inlet end of the solenoid valve, which is plugged into the air outlet socket 131 of the pump cover and The trachea quick-plug connector 32 is the outlet end of the solenoid valve. The trachea quick-plug connector 32 is arranged in the cylindrical socket on the upper part of the head end cover 5, and is used to connect with the trachea of ​​the pneumatic waist support. The shape of the trachea quick-plug connector 32 is a barbed quick-plug structure. The diameter of the air outlet of the trachea quick-plug connector is 2.5mm. The design of the barbed quick-plug structure can realize the quick plug-in of the trachea. The solenoid valve 3 is installed with an O-ring 33 near the bottom of the trachea quick-plug connector 32. The O-ring 33 has a different sealing effect from the traditional O-ring. The O-ring in this embodiment is used to adjust the gap between the outlet end of the solenoid valve 3 and the head end cover, so that the outlet end of the solenoid valve 3 can be snapped onto the head end cover 5 to prevent the two from being unable to be snapped onto each other or being loosely connected due to dimensional errors during processing of the solenoid valve or the head end cover; a positioning column 34 is processed on the valve body (injection molded valve body) of the solenoid valve 3 at a position opposite to the positioning hole of the control circuit board, and two first PIN needles 35 are also embedded on the valve body. One end of the two first PIN needles 35 is welded to the enameled wire wound on the valve body, and the other end passes through the control circuit board and is welded to the control circuit board 4. The control circuit board 4 is plugged into the solenoid valve through the positioning column 34 and is welded together through the pins of the two first PIN needles; a silencer 37 is also provided at a position near the outlet end of the solenoid valve. After the control circuit board 4 and the solenoid valve are assembled, the silencer 37 is arranged below the control circuit board 4.

[0052] The number of solenoid valves installed provided in this embodiment is adjusted according to the number of air outlets of the pump body, and each solenoid valve controls an air circuit respectively. Since the pump body provided in this application has two air outlets, this embodiment selects two solenoid valves with exactly the same structure.

[0053] The control circuit board 4 in this embodiment is welded with a second PIN pin 41 connected to the wiring harness plug. The second PIN pin 41 passes through the wiring harness plug jack of the head end cover and is exposed to the outside (see Figure 7 ).

[0054] Further, if Figures 8 to 10 As shown, the inner wall of the head end cover 5 described in this embodiment is processed with a square card window 51 at a position close to the opening end and opposite to the square card nose 135 of the pump cover, and the square card window 51 is carded with the square card nose 135. The basic wall thickness of the head end cover 5 (the wall thickness of the square card window) is 1.5mm, and the distance between the square card window 51 and the edge of the opening end of the head end cover 5 is 3.0mm to ensure a pull-out force test of 150N; the inner wall of the head end cover 5 is provided with a circle of bosses 57 at a position close to the square card window 51, and the bosses 57 are used for carding and limiting; the head end cover 5 is respectively processed with circuit board guide grooves 52 on the two inner side walls opposite to the control circuit board 4, and the circuit board guide grooves 52 play a guiding role when the control circuit board, the solenoid valve assembly and the head end cover 5 are assembled to prevent the second PIN needle 41 from being inserted off-center; the circuit board The guide groove 52 is formed by combining two vertical reinforcing ribs 521 arranged at intervals. This structure can not only play a guiding role, but also increase the strength of the head end cover; a cylindrical socket 53 is provided on the top surface of the head end cover 5 at a position opposite to the trachea quick connector 32 of the solenoid valve, and the cylindrical socket 53 is connected to the interior of the head end cover 5. A notch 531 is provided on the outer side of the cylindrical socket 53, and the trachea plug-in status can be easily checked through the notch. A solenoid valve slot 54 is processed around the circumference of the bottom of the cylindrical socket 53. The root of the solenoid valve outlet end is clamped in the solenoid valve slot 54 of the head end cover under the action of the O-ring 33. The trachea quick connector 32 of the solenoid valve passes through the solenoid valve slot 54 and is arranged in the cylindrical socket 53. The design of the solenoid valve slot 54 can not only ensure the firmness of the solenoid valve installation, but also can be used for positioning the trachea quick connector.

[0055] Furthermore, in this embodiment, the wiring harness plug is connected to the pump-valve integrated machine through the head end cover, and a square wiring harness plug jack 55 is processed on the outside of the head end cover, and a long strip opening 56 is processed inside the square wiring harness plug jack 55 at a position opposite to the second PIN needle 41 of the control circuit board 4. The second PIN needle 41 passes through the long strip opening 56 of the head end cover and is exposed to the outside. The long strip opening 56 is a chamfered slope structure, that is, the width of the bottom opening end of the long strip opening 56 is greater than the width of the top opening end. The design of the chamfered slope structure long strip opening 56 is convenient for workshop assembly and can also serve as a pin guide.

[0056] In addition, the head end cover described in this embodiment is an injection molding machine. In order to prevent the side walls of the square wiring harness plug socket from shrinking and deforming inward and affecting the connection between the wiring harness plug and the pump-valve integrated machine, the outer wall of the wiring harness plug socket on the head end cover is a sunken structure, and a plurality of right-angle reinforcing ribs 58 are arranged at the sunken position. The right-angle ends of the right-angle reinforcing ribs 58 are connected to the square wiring harness plug socket. The right-angle reinforcing ribs 58 are effectively prevented from being deformed by injection molding, thereby solving the problem that the speed limiting plug cannot be inserted or the insertion force does not meet customer requirements. In addition, the wiring harness plug socket is designed as a sunken structure, which can also ensure that the overall height of the head end cover is minimized, the internal structure of the shell is simple, and the mold is easy to open during injection molding, thereby making it easy to process.

[0057] Further, if Figures 1 to 3 , Fig.11 As shown, the installation of the tail end cover 6 in this embodiment can prevent the rear EMC circuit board 2 from being bumped. The tail end cover 6 is a cylindrical structure that matches the tail of the motor 11. A protrusion 61 is arranged inside the tail end cover 6 at the axial position. The protrusion 61 passes through the EMC circuit board 2 and presses against the tail end face of the motor. Three interference fit blocks 62 are evenly spaced along the circumferential direction on the inner side wall of the tail end cover 6. The tail end cover 6 is plugged into the outer casing of the motor of the pump body and has an interference fit with the motor casing.

[0058] In addition, in order to facilitate the lead-out of the wire 14 from the EMC circuit board 2, the present embodiment is provided with a protrusion 21 on the EMC circuit board, the wire 14 is welded on the protrusion 21 of the EMC circuit board, and the EMC circuit board 2 is connected to the control circuit board 4 through the wire 14; the tail end cover 6 is processed with an air avoidance groove 63 at a position opposite to the protrusion 21 of the EMC circuit board, and the portion where the air avoidance groove 63 contacts the protrusion 21 is a structure that imitates the air avoidance groove, and the air avoidance groove 63 of the imitating structure can not only facilitate the lead-out of the wire, but also limit the rotation of the tail end cover 6 in the circumferential direction, so that the tail end cover 6 is assembled more securely.

[0059] Example 2

[0060] The present invention provides a method for assembling a quick-assembly pneumatic lumbar support pump-valve integrated machine, the method comprising the following steps:

[0061] Step S1, welding the EMC circuit board to the tail of the pump body; wherein the EMC circuit board is provided with a protrusion;

[0062] Step S2, welding the control circuit board with the plug pin and two wires and the solenoid valve into an assembly; wherein, an air inlet plug is provided at one end of the solenoid valve, and an air pipe quick-connect connector is provided at the other end, a circle of grooves is processed along the circumferential direction on the outer wall of the air inlet plug, an O-ring is installed in the groove, and the shape of the air pipe quick-connect connector is processed into a barbed quick-connect structure; the solenoid valve is installed with an O-ring at a position close to the bottom of the air pipe quick-connect connector, a positioning column is processed on the valve body of the solenoid valve at a position opposite to the positioning hole of the control circuit board, and two first PIN needles are also inlaid on the valve body, one end of the two first PIN needles is welded to the enameled wire wrapped around the valve body, and the other end passes through the control circuit board and is welded to the control circuit board, the control circuit board is plugged into the solenoid valve through the positioning column, and the pins of the two first PIN needles are welded together to form an assembly;

[0063] Step S3, inserting the solenoid valve air inlet plug into the air outlet socket of the pump cover, and plugging the control circuit board into the positioning slot of the pump cover;

[0064] Step S4, insert the control circuit board along the circuit board guide groove inside the head end cover, and clamp the head end cover and the pump cover together; at this time, the root of the solenoid valve outlet end is clamped in the solenoid valve clamping groove of the head end cover under the action of the O-ring, the air pipe quick plug connector of the solenoid valve passes through the solenoid valve clamping groove and is arranged in the cylindrical socket, and the second PIN needle of the control circuit board passes through the long strip opening of the head end cover and is exposed outside;

[0065] Step S5, welding the wires on the control circuit board and the tail EMC circuit board together;

[0066] Step S6, insert the tail end cover into the tail of the pump body to complete the assembly; wherein, the tail end cover is a cylindrical structure that matches the tail of the motor of the pump body, a protrusion is arranged inside the tail end cover at the axial position, the protrusion passes through the EMC circuit board and is pressed against the tail end face of the motor, a plurality of interference fit blocks are arranged on the inner side wall of the tail end cover at intervals evenly distributed along the circumferential direction, the tail end cover is plugged into the outer casing of the pump body motor and has an interference fit with the motor outer casing; the tail end cover is processed with an air avoidance groove at a position opposite to the protrusion of the EMC circuit board, and the wires of the EMC circuit board are led out from the air avoidance groove.

[0067] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A quick-assembly pneumatic lumbar support pump-valve integrated machine, characterized in that: It includes a pump body, an EMC circuit board, a solenoid valve, a control circuit board, a head end cover, and a tail end cover; wherein, the end of the pump cover on the pump body that contacts the solenoid valve is provided with an air outlet socket and a positioning slot of the control circuit board; the welded assembly of the control circuit board and the solenoid valve is plugged into the pump cover, the air inlet end of the solenoid valve is inserted into the air outlet socket of the pump cover and is air-tightly engaged with the air outlet socket, and the control circuit board is plugged into the positioning slot of the pump cover; an elastic O-ring is provided at the root of the air pipe quick connector of the solenoid valve, the control circuit board is inserted into the wiring harness plug jack of the head end cover, the air outlet end of the solenoid valve is snap-fitted with the head end cover through the elastic O-ring, and the head end cover is snap-fitted with the pump cover.

2. A quick-assembly pneumatic lumbar support pump-valve integrated machine according to claim 1, characterized in that: The pump cover of the pump body is provided with two air outlet sockets, and a positioning slot is provided at a position of the pump cover opposite to the control circuit board, the positioning slot is composed of two transverse reinforcing ribs arranged at intervals, a pressure relief valve is provided on the pump cover, and a retaining spring slot is processed on the side wall of the pump cover, and the pump cover is connected to the pump body through the retaining spring; the pump cover is processed with a square retaining nose on any group of two opposite side walls, and the pump cover is connected to the head end cover through the square retaining nose.

3. The quick-assembly pneumatic lumbar support pump-valve integrated machine according to claim 1, characterized in that: The solenoid valve itself has an exhaust and silencer structure, one end of the solenoid valve is provided with an air inlet plug, and the other end is provided with an air pipe quick connector, a circle of grooves are processed on the outer wall of the air inlet plug in the circumferential direction, an O-ring is installed in the groove, the air inlet plug of the solenoid valve is inserted into the air outlet socket of the pump cover, and the two are connected by an O-ring; the air inlet plug is the air inlet end of the solenoid valve, and the air pipe quick connector is the air outlet end of the solenoid valve, the air pipe quick connector is arranged in the cylindrical socket on the upper part of the head end cover, and is used to connect with the air pipe of the pneumatic lumbar support, and the solenoid valve is installed near the bottom of the air pipe quick connector An O-ring is used to adjust the gap between the air outlet of the solenoid valve and the head end cover so that the air outlet of the solenoid valve is clamped on the head end cover; a positioning column is processed on the valve body of the solenoid valve at a position opposite to the positioning hole of the control circuit board, and two first PIN needles are also inlaid on the valve body. One end of the two first PIN needles is welded to the enameled wire wrapped around the valve body, and the other end passes through the control circuit board and is welded together with the control circuit board. The control circuit board is plugged into the solenoid valve through the positioning column and is welded together through the pins of the two first PIN needles; a silencer cotton is also arranged near the air outlet of the solenoid valve.

4. The quick-assembly pneumatic lumbar support pump-valve integrated machine according to claim 1, characterized in that: The inner side wall of the head end cover is processed with a square card window at a position close to the opening end and opposite to the square card nose of the pump cover, and the square card nose is carded with the square card window; the inner side wall of the head end cover is provided with a circle of bosses at a position close to the square card window, and the bosses are used for carding and limiting; the head end cover is respectively processed with circuit board guide grooves on the two inner side walls opposite to the control circuit board; the top surface of the head end cover is provided with a cylindrical socket at a position opposite to the air pipe joint of the solenoid valve, and the cylindrical socket is carded with the head end cover The inside of the cylindrical socket is connected, a notch is provided on the outside of the cylindrical socket, and a solenoid valve slot is processed around the circumference of the bottom of the cylindrical socket. The root of the solenoid valve outlet end is clamped in the solenoid valve slot of the head end cover under the action of the O-ring, and the air pipe quick-connect connector of the solenoid valve passes through the solenoid valve slot and is arranged in the cylindrical socket; a square wiring harness plug socket is processed on the outside of the head end cover, and a long strip opening is processed in the wiring harness plug socket at a position opposite to the second PIN pin of the control circuit board, and the long strip opening is a chamfered slope structure.

5. The quick-assembly pneumatic lumbar support pump-valve integrated machine according to claim 1, characterized in that: The tail end cover is a cylindrical structure that matches the motor tail of the pump body. A protrusion is arranged inside the tail end cover at the axial position. The protrusion passes through the EMC circuit board of the pump body and is pressed against the tail end face of the motor. A plurality of interference fit blocks are evenly spaced along the circumferential direction on the inner side wall of the tail end cover. The tail end cover is inserted into the outer casing of the motor of the pump body and has an interference fit with the motor outer casing.

6. The quick-assembly pneumatic lumbar support pump-valve integrated machine according to claim 3, characterized in that: The appearance of the trachea quick-plug connector is a barbed quick-plug structure, and the diameter of the air outlet of the trachea quick-plug connector is 2.5 mm.

7. The quick-assembly pneumatic lumbar support pump-valve integrated machine according to claim 4, characterized in that: The outer side wall of the wiring harness plug jack on the head end cover is a sunken structure, and a plurality of right-angle reinforcing ribs are arranged at the sunken position, and the right-angle ends of the right-angle reinforcing ribs are connected to the square wiring harness plug jack.

8. The quick-assembly pneumatic lumbar support pump-valve integrated machine according to claim 4, characterized in that: The circuit board guide groove is formed by combining two reinforcing ribs arranged at intervals.

9. The quick-assembly pneumatic lumbar support pump-valve integrated machine according to claim 5, characterized in that: The EMC circuit board is provided with a protrusion, the wire is welded on the protrusion of the EMC circuit board, the tail end cover is processed with an air avoidance groove at a position opposite to the protrusion of the EMC circuit board, and the part where the air avoidance groove contacts the protrusion is a structure that imitates the air avoidance groove.

10. A method for assembling a quick-assembly pneumatic lumbar support pump-valve integrated machine, characterized in that: The method comprises the following steps: Step S1, welding the EMC circuit board to the tail of the pump body; wherein the EMC circuit board is provided with a protrusion; Step S2, welding the control circuit board with the plug pin and two wires and the solenoid valve into an assembly; wherein, an air inlet plug is provided at one end of the solenoid valve, and an air pipe quick-connect connector is provided at the other end, a circle of grooves is processed along the circumferential direction on the outer wall of the air inlet plug, an O-ring is installed in the groove, and the shape of the air pipe quick-connect connector is processed into a barbed quick-connect structure; the solenoid valve is installed with an O-ring at a position close to the bottom of the air pipe quick-connect connector, a positioning column is processed on the valve body of the solenoid valve at a position opposite to the positioning hole of the control circuit board, and two first PIN needles are also inlaid on the valve body, one end of the two first PIN needles is welded to the enameled wire wrapped around the valve body, and the other end passes through the control circuit board and is welded to the control circuit board, the control circuit board is plugged into the solenoid valve through the positioning column, and the pins of the two first PIN needles are welded together to form an assembly; Step S3, inserting the solenoid valve air inlet plug into the air outlet socket of the pump cover, and plugging the control circuit board into the positioning slot of the pump cover; Step S4, insert the control circuit board along the circuit board guide groove inside the head end cover, and clamp the head end cover and the pump cover together; at this time, the root of the solenoid valve outlet end is clamped in the solenoid valve clamping groove of the head end cover under the action of the O-ring, the air pipe quick plug connector of the solenoid valve passes through the solenoid valve clamping groove and is arranged in the cylindrical socket, and the second PIN needle of the control circuit board passes through the long strip opening of the head end cover and is exposed outside; Step S5, welding the wires on the control circuit board and the tail EMC circuit board together; Step S6, insert the tail end cover into the tail of the pump body to complete the assembly; wherein, the tail end cover is a cylindrical structure that matches the tail of the motor of the pump body, a protrusion is arranged inside the tail end cover at the axial position, the protrusion passes through the EMC circuit board and is pressed against the tail end face of the motor, a plurality of interference fit blocks are arranged on the inner side wall of the tail end cover at intervals evenly distributed along the circumferential direction, the tail end cover is plugged into the outer casing of the pump body motor and has an interference fit with the motor outer casing; the tail end cover is processed with an air avoidance groove at a position opposite to the protrusion of the EMC circuit board, and the wires of the EMC circuit board are led out from the air avoidance groove.

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