JP2011109888A - Manufacturing method of fuel pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the manufacturing method of a fuel pump with a high cost performance and productivity by reducing the number of components used. <P>SOLUTION: The manufacturing method of the fuel pump 1 has: a first assembly step to mount a brush 60, a spring 41, and terminals 70, 80 to a cover 30; and a second assembly step, after the first assembly step, to mount the cover 30 to a motor 20 to be integrally assembled with a pump 10. The first assembly step includes: an arranging step for arranging each of the components to the predetermined position of a pallet 100, using the pallet 100 to determine the position in each component and to arrange it; a connection step for connecting the brush 60 to the terminals 70, 80; and a fixing step for press fitting the cover 30 into the terminals 70, 80 already connected and arranged to the position preliminarily determined on the pallet 100, and for fixing them. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for manufacturing an electric fuel pump that pumps fuel.

  Conventionally, an electric fuel pump including a pump unit and a motor unit inside a housing is known (for example, see Patent Document 1). As shown in FIG. 2 of Patent Document 1, the housing of the fuel pump includes a pump cover 21 having a connector 19 including a fuel discharge pipe 25 and a terminal 27 to which power is supplied from a battery or the like. And the pump housing 15 that houses the pump portion 13 and the motor portion 11. Further, a bearing holder is provided between the pump cover 21 and the pump housing 15 to support a bearing that rotatably supports the shaft of the armature. The bearing holder is sandwiched and fixed between the pump cover 21 and the pump housing 15, and the pump cover 21 is fixed to the pump housing 15 by caulking.

  When assembling the fuel pump described in Patent Document 1, a process is performed in which a brush is assembled to a bearing holder so as to be movable in the axial direction, and a brush terminal or the like is press-fitted and fixed to the bearing holder. Further, a process of connecting the brush and the brush terminal, the choke coil and the terminal 27, and the choke coil and the brush terminal by heat caulking is performed. The sub-assemblies formed by connecting the brush terminal, the choke coil, and the brush in this way are created for the positive electrode and the negative electrode, respectively, and these two sub-assemblies are press-fitted into the bearing holder and fixed. Become. Further, the subassembly that is press-fitted and fixed to the bearing holder is also fixed to the pump cover 21 by assembling the pump cover 21 to the bearing holder.

  The assembly of the bearing holder, the subassembly and the pump cover 21 is completed by the above procedure. The pump cover 21 assembled with the subassembly and the bearing holder is assembled to the pump housing 15 together with the pump unit 13 and the motor unit 11 to manufacture the fuel pump.

JP-A-7-91343

  However, in the fuel pump described in Patent Document 1, the bearing holder has an important function as a part for press-fitting and fixing the subassembly in the manufacturing process. For this reason, although the bearing holder is a necessary component for assembly, it is a problem from the viewpoint of reducing the number of components constituting the fuel pump and improving the efficiency of component management.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a fuel pump manufacturing method with improved cost performance and productivity by reducing the number of parts.

The present invention employs the following technical means to achieve the above object. That is, the invention according to claim 1 is a pump unit that conveys fuel, a motor unit that has a commutator and drives the pump unit, a brush that is slidably contacted with the commutator, and a brush that is a commutator. A fuel pump manufacturing method comprising: an urging member that urges in a direction; a terminal that is electrically connected to the brush; and a cover that is housed together with the brush so that the urging member urges the brush. And
The cover portion includes a first assembly step for assembling the brush, the biasing member, and the terminal, and a second assembly step for assembling the cover portion after the first assembly step to the motor portion assembled integrally with the pump portion. And
The first assembly process is
Using an assembly jig for positioning and arranging each of the brush, the biasing member and the terminal, and arranging the brush, the biasing member and the terminal at a predetermined position of the assembly jig;
A wiring process for connecting the brush and the terminal;
A fixing step of pressing and fixing the terminal, which is arranged at a predetermined position in the assembling jig and connected, to the cover portion;
A separation step of separating the cover portion after the fixing step and the assembling jig.

  According to the present invention, in the first assembly step of assembling the brush, the urging member, and the terminal on the cover portion, the brush, the urging member, and the terminal parts are positioned and arranged on the assembly jig. Furthermore, in the first assembly process, for each of the appropriately arranged parts, a connection process for connecting at least the brush and the terminal is performed, and the respective parts are assembled and appropriately arranged on the assembly jig. Can do. Thereafter, the terminal is press-fitted into the cover part and fixed, thereby fixing an assembly such as a brush appropriately arranged on the assembly jig to the cover part. Furthermore, the cover part to which the assembly product is fixed and the assembly jig can be separated to form a cover part integrated with the assembly product. By performing the second assembly process of assembling the cover unit integrated with the assembly product to the motor unit by such an assembly jig and a manufacturing method including the above-described steps, a brush or the like as in the above-described conventional technology The parts used for fixing the assembly product can be made unnecessary, and the deterioration of the assemblability due to the reduction of the parts can be eliminated. Therefore, a fuel pump excellent in cost performance and productivity due to a reduction in the number of parts can be provided by a manufacturing method in which a function of fixing the assembly product to the cover portion is provided.

  According to the invention described in claim 2, the assembling jig is constituted by combining a plurality of jigs. According to this invention, since the assembly jig is composed of a combination of a plurality of jigs, the types, shapes, and positions of the brushes, biasing members and terminals that require positioning are changed. On the other hand, an assembling jig that can be flexibly handled is obtained. Therefore, it becomes easy to change the assembly jig according to the type and number of components of the assembly product that needs to be assembled to the cover part, and it is possible to produce a wide variety of fuel pumps and improve their productivity. Can contribute.

According to the invention described in claim 3, in the fixing step, the terminal is press-fitted into the cover portion while being held by being held by a plurality of terminal holding jigs,
The cover part is separated from the assembly jig by releasing the terminal clamping state after the fixing step.

  According to the present invention, since the terminal is clamped and held by the plurality of terminal holding jigs included in the assembly jig in the fixing process, the terminal is press-fitted into the cover portion. Sex is secured. Further, when the clamping state is released during the separation operation from the assembly jig after press-fitting, it is possible to smoothly shift to the next process. Therefore, the gripping and opening of the terminal can be performed smoothly with a simple configuration, and the productivity of the fuel pump can be improved.

  According to the invention described in claim 4, the assembling jig includes a brush arrangement jig for accommodating the brush for positioning, and the brush arrangement jig in the state in which the brush is accommodated is disposed in the axial direction in the arrangement step. An urging member is arranged in a space formed above the brush by moving the brush.

  According to this invention, the urging member and the brush can be accommodated in a predetermined position of the cover portion so that the brush can be urged in the commutator direction, and this arrangement step can be performed with a small number of jigs. For this reason, management of an assembly jig and the number of components can be reduced, and improvement in productivity and cost can be expected.

  According to the invention described in claim 5, when the holding jig is used to hold and move the cover portion in the vertical direction in the fixing step, and the terminal is press-fitted into the cover portion, the cover is used to press-fit the terminal. When the terminal starts to fit into the press-fitting hole provided in the part, loosen the force held by the gripping jig, and then proceed with the movement of the cover part by the gripping jig to advance the press-fitting of the terminal Features.

  In the fixing process, the position and operation of the gripping jig are adjusted so that the terminal is positioned appropriately with respect to the press-fitting hole, but there is a slight shift between the core of the terminal and the center of the press-fitting hole. There is. This may also be affected by conditions (for example, gripping force, terminal tilt, dust and dirt adhesion) when the terminal is gripped by a gripping jig. Therefore, according to the present invention, the core of the terminal is aligned so as to approach the center of the press-fitting hole part by loosening the force held by the holding jig when the terminal starts to fit into the press-fitting hole part in the fixing step. be able to. Accordingly, in the subsequent press-fitting operation, the terminal can be evenly circumscribed with respect to the inner wall surface forming the press-fitting hole. Accordingly, the press-fitting operation of the terminal can be performed smoothly and reliably.

  According to the invention described in claim 6, the cover part is provided with a press-fitting hole part for press-fitting the terminal in the fixing process, and a mortar-shaped surface is formed around the opening of the press-fitting hole part. Features. According to the present invention, since the mortar-shaped surface is formed around the opening of the press-fitting hole portion, the end portion of the terminal is press-fitted when trying to fit the end portion of the terminal into the press-fitting hole portion in the fixing process. It becomes easy to guide to the hole, and can contribute to a smooth press-fitting operation.

It is the longitudinal cross-sectional view which showed the fuel pump manufactured with the manufacturing method of 1st Embodiment. It is the perspective view which showed the pallet (assembly jig | tool) used in the manufacturing process of a fuel pump. It is the perspective view which showed the pallet base part among the pallets of FIG. It is the perspective view which showed the jig | tool for arrange | positioning a brush terminal among the pallets of FIG. It is the perspective view which showed the jig | tool for arrange | positioning a plate terminal among the pallets of FIG. It is the perspective view which showed the brush arrangement | positioning jig | tool among the pallets of FIG. It is a perspective view for demonstrating the process of arrange | positioning the brush in the manufacturing process of a fuel pump. It is a perspective view for demonstrating the process of arrange | positioning the brush terminal in the manufacturing process of a fuel pump. It is a perspective view for demonstrating the process of connecting the brush and brush terminal in the manufacturing process of a fuel pump. It is a perspective view for demonstrating the process of arrange | positioning the plate terminal in the manufacturing process of a fuel pump. It is a perspective view for demonstrating the process of arrange | positioning the choke coil in the manufacturing process of a fuel pump. It is a perspective view for demonstrating the process of connecting a choke coil, a brush terminal, and a plate terminal in the manufacturing process of a fuel pump, respectively. It is a perspective view for demonstrating the process of arrange | positioning the spring in the manufacturing process of a fuel pump. It is the perspective view which showed the state which assembles | attaches a cover part with respect to the subassembly installed in the predetermined position of the pallet in the manufacturing process of a fuel pump. It is the perspective view which showed the state which complete | finished the assembly | attachment process of the cover part in the manufacturing process of a fuel pump. It is the bottom view which showed the internal structure of the cover part. It is the side view which showed the structure of the subassembly. It is a bottom view which shows the state which assembled | attached the subassembly to the cover part. It is sectional drawing in the XIX-XIX cut surface of FIG.

(First embodiment)
1st Embodiment of the manufacturing method of this invention is described based on FIGS. FIG. 1 is a longitudinal sectional view showing a fuel pump manufactured by the manufacturing method of the first embodiment. For example, the fuel pump 1 is housed in a fuel tank of a vehicle or the like in a fuel supply system of an electronic fuel injection system, and supplies fuel sucked from the fuel tank to the engine side. The target fuels are gasoline, light oil, alcohol mixed fuel, bioethanol, ethanol 100% fuel, and the like.

  The fuel pump 1 mainly includes a motor unit 20, a pump unit 10 that is driven by the motor unit 20 and pressurizes and conveys fuel sucked and a cover unit 30. The motor unit 20 is composed of a DC motor with a brush, and a permanent magnet is annularly arranged in a cylindrical housing 21. An armature 22 is disposed concentrically on the inner peripheral side of the permanent magnet.

  The pump unit 10 includes a casing body 11, a casing cover 12, an impeller 13, and the like. A pump flow path 14 is formed by the casing body 11 and the casing cover 12, and an impeller 13 is rotatably accommodated in the pump flow path 14. The impeller 13 includes blades and blade grooves formed between the blades over the entire circumference of the outer peripheral edge. The casing body 11 and the casing cover 12 are formed by, for example, aluminum die casting.

  The casing body 11 is fixed to the inner side of one end of the housing 21 (for example, the lower side or the counter cover 30 side in FIG. 1), and a bearing 17 is fitted at the center thereof. The casing cover 12 is fixed to one end of the housing 21 (the end on the side opposite to the cover 30) by caulking or the like while being covered with the casing body 11. A thrust bearing 16 is press-fitted and fixed at the center of the casing cover 12. One side of the armature 22 on the shaft 23 (on the side opposite to the cover portion 30 than the armature 22) is supported by the bearing 15 in the radial direction so as to be rotatable, and the thrust bearing 16 supports a load in the thrust direction. Yes. The other side of the shaft 23 (the cover part 30 side with respect to the armature 22) is rotatably supported by the bearing 17 in the radial direction.

  A fuel inlet 18 is formed in the casing cover 12. As the impeller 13 rotates, the fuel in the fuel tank is sucked into the pump passage 14 from the fuel inlet 18. The pump flow path 14 includes a boost passage and a buffer chamber (not shown). The pressure of the fuel is increased by the rotation of the impeller 13 in the pressure increasing passage.

  The fuel sucked into the pump flow path 14 is pressurized by the rotation of the impeller 13 and discharged from the fuel outlet (not shown) formed in the casing body 11 to the fuel chamber 24 of the motor unit 20. A pump groove 11 a is formed in the casing body 11 along the blades of the impeller 13. The pump groove 11a is formed in a C-shaped longitudinal section. Also in the casing cover 12, a pump groove 12a having the same shape is formed at a position facing the pump groove 11a.

  The armature 22 is rotatably accommodated in the housing 21, and a coil is wound around the outer periphery of the core 221. The commutator 25 is formed in a disk shape, and is disposed on the upper portion (the end portion on the cover portion 30 side) of the armature 22. The commutator 25 has a plurality of segments 251 arranged side by side in the rotation direction. The segments 251 are made of, for example, carbon, and the segments 251 are electrically insulated from each other by a gap and an insulating resin material.

  Power is supplied from the power source (not shown) to the coil of the armature 22 via the connector 40 of the cover 30. When the armature 22 is rotated by the electric power supplied in this manner, the impeller 13 is rotated together with the shaft 23 of the armature 22. When the impeller 13 rotates, fuel is sucked into the pump passage 14 from the fuel inlet 18, and this fuel receives kinetic energy from each blade of the impeller 13 and is discharged from the pump passage 14 through the fuel outlet to the fuel chamber 24. . The fuel discharged into the fuel chamber 24 passes around the armature 22 and is discharged from the discharge port 31 to the outside of the fuel pump 1.

  The cover part 30 is installed in the edge part 21a on the opposite side to the pump part 10 of the housing 21. As shown in FIG. The cover part 30 is formed of, for example, a PPS resin material or a POM resin material. An end 30a of the cover 30 on the pump unit 10 side is fixed to the end 21a of the housing 21 by caulking or the like. The cover portion 30 is formed with a discharge passage 32, a bearing housing portion 33, a connector 40, and the like. The discharge passage 32 communicates the fuel chamber 24 and the discharge port 31 through the cover portion 30. A bearing 17 that supports the shaft 23 is accommodated in the bearing accommodating portion 33. The connector 40 is formed at the end of the cover portion 30 on the side opposite to the pump portion 10 (upper side in FIG. 1), and is connected to a power connector (not shown) connected to a power source.

  The cover portion 30 is further formed with a spring chamber 34 as a biasing member accommodating portion and a brush chamber 35 as a brush accommodating portion. The spring chamber 34 and the brush chamber 35 are formed so as to be connected in the axial direction of the cover portion 30. The spring chamber 34 is formed on the anti-pump portion 10 side of the brush chamber 35. The cover portion 30 accommodates a spring 41 as an urging member and a subassembly 50 shown in FIG. The spring 41 is accommodated in a spring chamber 34 formed in the cover portion 30.

  FIG. 17 is a side view showing the sub-assembly 50 that is assembled in the manufacturing process and fixed to the cover part 30 without showing the cover part 30. The fuel pump 1 has two subassemblies 50 for the positive electrode and the negative electrode that have the same configuration. The subassembly 50 includes a brush 60, a brush terminal 70, a plate terminal 80, and a choke coil 90, and these are connected and configured integrally. In the present embodiment, the subassembly 50 is fixed to the cover unit 30 by being press-fitted into the cover unit 30. Specifically, the subassembly 50 is securely held by the cover portion 30 when a part of each of the brush terminal 70 and the plate terminal 80 is press-fitted into a predetermined hole portion of the cover portion 30 and fixed. is there. Hereinafter, the brush terminal 70 and the plate terminal 80 may be simply referred to as the terminal 70 and the terminal 80, respectively.

  The brush 60 is accommodated in the brush chamber 35 so as to be movable in the axial direction. One end of the brush 60 (the upper end in FIG. 1) can be brought into contact with the spring 41 accommodated in the spring chamber 34, and the other end (for example, the lower end in FIG. 1). The end portion can be brought into contact with the commutator 25 of the motor unit 20. The brush 60 is disposed to face the commutator 25 in the axial direction of the cover part 30. Since the brush 60 is urged toward the commutator 25 (motor unit 20) by the spring 41, the brush 60 follows the armature 22 regardless of the rotation of the armature 22 and the movement of the armature 22 in the thrust direction. Thus, the inside of the brush chamber 35 can be moved in the axial direction. Thereby, the brush 60 comes into sliding contact with the commutator 25 regardless of the rotation of the armature 22 and the movement in the thrust direction.

  The brush terminal 70 is provided so as to project outward from the main body 74, the V-shaped connection portion 71 for connecting to one end 93 of the winding 92 of the choke coil 90, and the connection A V-shaped connecting portion 72 for connecting to the wire 61 protruding from the brush 60 and an upper portion of the main body portion 74, provided to protrude outward from the main body portion 74 so as to be aligned with the portion 71, and a cover portion And a press-fitting portion 73 that is press-fitted into a first hole 300 (see FIG. 16) as a press-fitting hole formed in 30. The wire 61 is a flexible conductive member that electrically connects the brush 60 and the brush terminal 70. Although the brush 60 and the brush terminal 70 are connected by the wire 61, the wire 61 is flexible, so that the brush 60 and the brush terminal 70 are relatively movable with the wire 61 interposed therebetween.

  The plate terminal 80 includes a press-fit portion 83 and a base portion 82 that are press-fitted into a second hole portion 310 (see FIG. 16) as a press-fit hole portion formed in the cover portion 30 and penetrate the cover portion 30. This is a conductive second terminal formed in an L shape. Further, a connecting portion 81 having a V shape is formed on the base portion 82 in order to connect to the other end portion 94 of the winding 92 of the choke coil 90. As shown in FIG. 17, the base portion 82 is in a position to support the end portion of the core 91 on the motor portion 20 side (for example, the lower side in FIG. 1) toward the cover portion 30 side. Thereby, since the core 91 is supported from below in the manufacturing process, it can be prevented from falling off the winding 92. The plate terminal 80 is installed on the cover 30 so that the press-fit portion 83 protrudes from the second hole 310 into the connector 40.

  The choke coil 90 is for reducing electrical noise (for example, a high frequency component) generated when the positive and negative brushes 60 sequentially slide with the segments 251 of the commutator 25. The choke coil 90 is configured by winding a winding 92 around a cylindrical core 91. One end 93 of the winding 92 is connected to the connecting portion 71 of the brush terminal 70, and the other end 94 is connected to the connecting portion 81 of the plate terminal 80. The tip of the wire 61 fixed to the brush 60 is connected to the connecting portion 72 of the brush terminal 70. For example, one end portion 93 of the winding 92 is firmly connected to the brush terminal 70 by performing fusing, which is heat caulking by energization, on the connection portion 71, and the other end portion 94 is connected to the connection portion 81. On the other hand, it is firmly connected to the plate terminal 80 by performing fusing, and the distal end portion of the wire 61 is firmly connected to the brush terminal 70 by performing fusing with respect to the connecting portion 72. The fusing is heat caulking that ensures electrical strength by applying electrical current to a lead wire to peel off the film to make it electrically conductive, and then press-contacting with a caulking force between the terminal and the core wire.

  Next, a method for manufacturing the fuel pump 1 will be described. In the manufacturing method of the present embodiment, the brush 60, the brush terminal 70, the plate terminal 80, and the choke coil 90 are arranged at predetermined positions on the pallet 100, which is an assembly jig, and the components are connected and integrated. The positive and negative subassemblies 50 are assembled. Then, each of the subassemblies 50 assembled on the pallet 100 is press-fitted and fixed to the cover portion 30 (the first assembly process).

  The pallet 100 will be described. FIG. 2 is a perspective view showing the pallet 100 used in the manufacturing process of the fuel pump 1. FIG. 3 is a perspective view showing the pallet base 110 in the pallet 100 of FIG. FIG. 4 is a perspective view showing a brush terminal placement jig 130 (first terminal jig) for placing the brush terminals 70 in the pallet 100 of FIG. FIG. 5 is a perspective view showing a plate terminal placement jig 140 (second terminal jig) for placing the plate terminal 80 in the pallet 100 of FIG. FIG. 6 is a perspective view showing the brush placement jig 150 in the pallet 100 of FIG.

  As shown in FIG. 2, the pallet 100 is mainly formed by combining a pallet base 110, a brush terminal placement jig 130, a plate terminal placement jig 140, and a brush placement jig 150. As shown in FIGS. 2 and 3, the pallet base 110 includes a base 121 that has a flat rectangular parallelepiped shape and a tower 120 that stands upward from the base 121. The tower unit 120 includes a receiving space for assembling the brush terminal arrangement jig 130, the plate terminal arrangement jig 140, and the brush arrangement jig 150, a positioning part for positioning each jig, and a fixing part for fixing. Yes.

  As shown in FIG. 4, the brush terminal arrangement jig 130 is a first terminal jig used for positioning and fixing the brush terminal 70, which is the first terminal, to the pallet 100. The brush terminal arrangement jig 130 includes two jigs that are symmetrical to each other. Each jig is formed at the upper part and holds the holding part 131 to hold the brush terminal 70, and is formed at the lower part and is held by the holding part 131 by being pushed inward (P1 direction in FIG. 4) from the outside. An operation portion 132 that reduces the force, and is formed in a stepwise thickness from the holding portion 131 to the operation portion 132, and the strength increases as it goes downward.

  Further, a through hole 133 is formed between the holding portion 131 and the operation portion 132 extending in a rod shape. As shown in FIG. 2, the through-hole 133 is a hole into which the bolt 118 is inserted when assembled to the pallet base 110, and has an inner diameter slightly larger than the shaft diameter of the bolt 118. When the operation unit 132 is pushed inward (P1 direction in FIG. 4) in the assembled state on the pallet base unit 110, the holding unit 131 located on the opposite side of the operation unit 132 with the bolt 118 as a fulcrum is displayed. It opens outward (O1 direction in FIG. 4).

  As shown in FIG. 5, the plate terminal arrangement jig 140 is a second terminal jig used for positioning and fixing the plate terminal 80 as the second terminal to the pallet 100. The plate terminal arrangement jig 140 is composed of two jigs that are symmetrical to each other. Each jig includes a holding part 141 formed on the upper part for holding the plate terminal 80 and a protruding part formed on the lower part so as to protrude from the holding part 141 to the side. And an operation unit 142 that reduces the holding force in the holding unit 141 when the portion is pushed from the back side toward the front side (P2 direction in FIG. 5), from the holding unit 141 to the operation unit 142 It is an L-shaped member that is formed stepwise and increases in strength as it goes downward.

  Further, a through hole 143 is formed between the holding portion 141 extending in a rod shape and the operation portion 142. This through hole 143 is a hole into which the bolt 119 is inserted when assembled to the pallet base 110 as shown in FIG. 2 and has an inner diameter slightly larger than the shaft diameter of the bolt 119. When the operation unit 142 is pushed from the back side toward the front side (P2 direction in FIG. 5) in the assembled state on the pallet base unit 110, the bolt 119 is used as a fulcrum to hold the operation unit 142 on the opposite side. The part 141 opens in the reverse direction from the front side to the back side (O2 direction in FIG. 5).

As shown in FIG. 6, the brush placement jig 150 is a jig used to position the brush 60 and the spring 41. The brush placement jig 150 is an L-shaped member, and is arranged to extend upward from one side of the base 151 and a base 151 that is formed in the lower portion and is installed on the tower 120 of the pallet base 110. Column part 152.
In the base 151, two through holes 153 that penetrate in the vertical direction are formed on the other side opposite to the column part 152. This through-hole 153 is a hole into which the cylindrical part 112 is inserted when assembled to the pallet base part 110 as shown in FIG. 2, and has an inner diameter slightly larger than the outer diameter of the cylindrical part 112. ing. In this way, the cylindrical portion 112 is fitted into the through hole 153, whereby the brush placement jig 150 is positioned with respect to the pallet base portion 110.

  The column portion 152 is formed with a cylindrical hole portion 154 that opens to the upper surface and extends downward. Two cylindrical hole portions 154 are formed. In the manufacturing process, the positive electrode brush 60 and the spring 41 are accommodated in one cylindrical hole portion 154, and the negative electrode brush 60 and the spring 41 are accommodated in the other cylindrical hole portion 154. A spring 41 is accommodated. Since the brush placement jig 150 is assembled so as to be displaceable in the vertical direction with respect to the pallet base 110, the position of the bottom of the cylindrical hole 154 is displaced in the vertical direction, so that the cylindrical hole 154 The depth from the upper surface is configured to be adjustable with the vertical displacement. For example, if the bottom part of the cylindrical hole part 154 is constituted by a predetermined part of the pallet base part 110, the length from the upper surface to the bottom part of the cylindrical hole part 154 in accordance with the vertical displacement of the brush placement jig 150. Can be changed. Thus, the depth of the cylindrical hole 154 is changed according to the process of inserting the brush 60 into the cylindrical hole 154 and the process of inserting the spring 41 into the cylindrical hole 154 and arranging it. can do.

  As shown in FIG. 3, the tower portion 120 is a rod-shaped brush terminal holding portion that forms a space in which the main body portion 74 of the brush terminal 70 can be fitted and accommodated with the holding portion 131 of the brush terminal arrangement jig 130. 111 and two cylindrical portions 112 into which the column portions 152 are fitted respectively when the brush placement jig 150 is assembled are provided so as to extend upward. Further, the tower portion 120 can accommodate the accommodation recess 113 that can accommodate a rod-shaped portion from the middle in the vertical direction of the brush terminal placement jig 130 to the operation portion 132 and the lower portion of the plate terminal placement jig 140. An accommodation recess 114 and an accommodation recess 115 capable of accommodating a bar-like portion extending downward from the holding portion 141 at the top of the plate terminal arrangement jig 140 are formed. The housing recess 114 and the housing recess 115 are connected by a continuous groove formed in accordance with the shape of the bar-like part so that the bar-like part from the upper part to the lower part of the plate terminal arrangement jig 140 is almost fitted.

  Further, the tower portion 120 is formed with two protrusions 117 protruding upward on the top portion 116 on which the plate terminal 80 is placed in the assembly process. The two protrusions 117 contribute to the positioning of the plate terminal 80 by fitting into the holes (not shown) of the plate terminal 80 when the plate terminal 80 is arranged in the assembly process. Further, the tower unit 120 includes a bolt 118 that is inserted through the through-hole 133 and is mounted so as to cross the receiving recess 113 and a plate terminal arrangement jig 140 in order to rotatably support the brush terminal arrangement jig 130. And a bolt 118 that is inserted through the through-hole 143 and attached so as to cross the receiving recess 114.

  The pallet 100 shown in FIG. 2 is in an initial stage state before the subassembly 50 is created on the pallet 100, and the brush terminal arrangement jig 130, the plate terminal arrangement jig 140, and the brush arrangement jig are arranged on the pallet base 110. The tool 150 and the like are assembled and integrated. In this state, the operation unit 132 and the operation unit 142 protrude from the tower unit 120 by a predetermined length so that they can be operated. Further, since the brush placement jig 150 is disposed at a predetermined position in the vertical direction with respect to the tower portion 120, the two cylindrical hole portions 154 are deep enough to accommodate the portion of the brush 60 below the wire 61. Is set. Furthermore, in this initial stage, the base 121 of the pallet base 110 is fixed at a predetermined position and is stationary in the assembly process of the subassembly 50 and the cover 30. Therefore, in assembly in the subsequent manufacturing process, each component is reliably arranged at a predetermined position.

  Next, a procedure for creating the subassembly 50 and assembling the cover 30 and the subassembly 50 included in the first assembly step shown in FIGS. 7 to 15 will be described with reference to the drawings. FIG. 7 is a perspective view for explaining a step of arranging the brush 60 in the manufacturing process of the fuel pump 1 (part of the arranging step). As shown in FIG. 7, in the brush 60 placement step, each of the two brushes 60 is placed below the two cylindrical holes 154 of the brush placement jig 150 in the pallet 100 assembled in the state of FIG. 2. Insert it toward. The two brushes 60 are installed in such a posture that they abut against the bottom set in the cylindrical hole 154 and protrude from the upper surface of the brush placement jig 150.

  FIG. 8 is a perspective view for explaining a process of arranging the brush terminal 70 (a part of the arrangement process). As shown in FIG. 8, in the arrangement process of the brush terminals 70, each of the two brush terminals 70 is replaced with the holding portion 131 of the brush terminal arrangement jig 130 and the brush terminal in the pallet 100 in which the two brushes 60 are installed. It inserts downward into a cylindrical space formed between the holding part 111. As a result, the lower portions of the main body portions 74 of the two brush terminals 70 are sandwiched between the holding portion 131 and the brush terminal holding portion 111 so as not to move unexpectedly in various assembly processes performed thereafter. Is held securely.

  In the arrangement process of the brush terminal 70, before the brush terminal 70 is inserted into the cylindrical space, the operation unit 132 of the brush terminal arrangement jig 130 is pushed in the P1 direction (inward) shown in FIG. To do. By this operation, with the bolt 118 inserted through the through-hole 133 as a fulcrum, the brush terminal placement jig 130 is displaced so that the upper holding portion 131 opens in the O1 direction (outward) shown in FIG. For this reason, the entrance of the cylindrical space formed between the holding part 131 and the brush terminal holding part 111 becomes large, and the brush terminal 70 can be easily inserted. Then, when the insertion operation of the brush terminal 70 is completed, by releasing the force applied to the operation unit 132, this time, the holding unit 131 returns to the original state before the operation so that it closes inward, The main body 74 of the brush terminal 70 is held between the brush terminal holding part 111. Thus, the brush terminal arrangement jig 130 (holding part 131) and the pallet base part 110 (brush terminal holding part 111) function as a terminal holding jig for holding the brush terminal 70.

  If the brush terminal placement jig 130 has a shape or material that is flexible enough to be bent outward by the insertion operation of the brush terminal 70, the holding portion 131 spreads outward during the insertion operation. It is not necessary to perform the process for expanding the insertion space by pressing the operation unit 132.

  FIG. 9 is a perspective view for explaining a process of connecting the two brushes 60 for the positive electrode and the negative electrode and the brush terminal 70 (part of the connection process). As shown in FIG. 9, in the connection process between the brush 60 and the brush terminal 70, the end of the wire 61 of the brush 60 is sandwiched between the connection portions 72 of the brush terminal 70, and the energization heat is applied in a state of being narrowed by the electrodes as described above. Perform caulking. As a result, the brush 60 is securely and electrically and mechanically connected to the brush terminal 70.

  FIG. 10 is a perspective view for explaining a process of arranging the plate terminal 80 (a part of the arrangement process). As shown in FIG. 10, in the plate terminal 80 arranging step, after the two sets of the brush 60 and the brush terminal 70 are connected, the two plate terminals 80 are respectively connected to a predetermined portion of the top portion 116 of the tower portion 120. Place it at the position for accurate positioning. At this time, the plate terminal 80 is placed in a posture in which the press-fit portion 83 is erected upward with the base portion 82 facing down, and protrudes from the top portion 116 into two holes (not shown) of the plate terminal 80. Positioning is performed so as to be fitted to the protrusions 117. At this time, the base portion 82 can also be held from the side by the holding portion 141. Thereby, the two plate terminals 80 are clamped by the protrusion 117 and the holding part 141, and are reliably held so as not to move unexpectedly in various assembly processes performed thereafter.

  In the step of arranging the plate terminal 80, before the plate terminal 80 is installed on the top portion 116, the operation unit 142 of the plate terminal arrangement jig 140 is arranged in the direction P2 shown in FIG. 5 (direction from the back side to the front side). Operate to press. By this operation, with the bolt 119 inserted through the through-hole 143 as a fulcrum, the plate terminal placement jig 140 is opened in the O2 direction (direction from the front side to the back side) shown in FIG. Displace. For this reason, the space formed between the holding | maintenance part 141 and the projection part 117 becomes large, and it becomes easy to perform operation which installs the plate terminal 80. FIG. Then, when the installation operation of the brush terminal 70 is completed, the force applied to the operation unit 142 is released, so that the holding unit 141 is now directed in the direction opposite to the O2 direction (the direction from the back side to the front side). The original state before the operation is restored so as to close, and the base 82 of the plate terminal 80 is pressed. Thus, the plate terminal arrangement jig 140 (holding part 141) and the pallet base part 110 (tower part 120) function as a terminal holding jig for holding the plate terminal 80.

  If the plate terminal placement jig 140 has a shape or material that is flexible enough to bend toward the brush 60 by the insertion operation of the plate terminal 80, the holding portion 141 is moved to the brush 60 side (front side) during the insertion operation. Therefore, it is not always necessary to perform a process for expanding the insertion space by pressing such an operation unit 142.

  FIG. 11 is a perspective view for explaining a process of arranging the choke coil 90 (a part of the arrangement process). As shown in FIG. 11, in the arrangement process of the choke coil 90, after the arrangement process of the plate terminal 80, the core 91 is erected so that the axis is in the vertical direction, and the base portion 82 of the plate terminal 80. Each of the two choke coils 90 is disposed at a predetermined position on the top portion 116 of the tower portion 120 so that the bottom portion of the core 91 is placed on the top. At this time, the choke coil 90 has one end 93 (the end located on the upper side of the choke coil 90) of the winding 92 near the connection portion 71 of the brush terminal 70 and the other end of the winding 92. 94 (the end portion located on the lower side of the choke coil 90) is positioned so as to be located near the connection portion 81 of the plate terminal 80.

  FIG. 12 is a perspective view for explaining a process of connecting the choke coil 90 to the brush terminal 70 and the plate terminal 80 (part of the connection process). As shown in FIG. 12, in the connection process of the choke coil 90 and the terminals 70 and 80, one end 93 of the winding 92 is sandwiched by the connection part 71 of the brush terminal 70 after the arrangement process of the choke coil 90. As described above, energization heat caulking is performed in a state where the pressure is reduced by the electrodes. As a result, the choke coil 90 is securely and electrically connected to the brush terminal 70. Further, the other end portion 94 of the winding 92 is sandwiched between the connection portions 81 of the plate terminal 80, and energization heat caulking is performed in a state where the pressure is narrowed by the electrodes as described above. As a result, the choke coil 90 is securely and electrically connected to the plate terminal 80. The two subassemblies 50 created through the above steps are installed at predetermined positions on the pallet 100.

  FIG. 13 is a perspective view for explaining the step of arranging the spring 41 (part of the arranging step). As shown in FIG. 13, in the step of arranging the spring 41, after the connecting step of the choke coil 90 and each of the terminals 70 and 80, first, the base 151 of the brush arrangement jig 150 is grasped with a holding jig such as a chuck. The entire brush placement jig 150 is moved upward by moving it upward. As a result, the column portion 152 is lifted upward with respect to the stationary brush 60, so that the brush 60 is completely accommodated in the cylindrical hole portion 154, and the cylindrical hole portion above the brush 60. An empty space into which the spring 41 can be inserted is created at 154. Next, by placing the spring 41 so that its axis is in the vertical direction and inserting it into the empty space, the arrangement process of the spring 41 is completed. At this time, the spring 41 is installed in a state in which a part thereof protrudes upward from the opening of the cylindrical hole 154.

  According to the arrangement and connection of each component on the pallet 100 in the connection step shown in FIGS. 9 and 12 and the arrangement step shown in FIGS. 7, 8, 11 and 13, each component such as the brush 60 is attached. Compared with the case where the assembly product is made by connecting the wires with electric heat caulking, etc. and then assembled to the parts on the fuel pump side such as the cover 30, the effects of shortening the time between each process and reducing the assembly space are obtained. It is done. Therefore, there are advantageous effects in improving the efficiency of the connection process such as energization heat caulking and reducing the number of man-hours.

  FIG. 14 is a perspective view showing a state in which the cover portion 30 is assembled to the subassembly 50 installed at a predetermined position of the pallet 100. Further, FIG. 15 is a perspective view showing a state in which the subassembly 50 is press-fitted and fixed to the cover part 30 and the assembly of the cover part 30 is finished. In assembling the cover part 30, the cover part 30 is covered so that each component arranged at a predetermined position until the arrangement process of the spring 41 is placed in a predetermined part formed inside the cover part 30. 30 is pushed downward, and the subassembly 50 is press-fitted into the cover part 30 (the fixing process).

  When the subassembly 50 is press-fitted into the cover part 30, the press-fitting part 73 of the brush terminal 70 and the press-fitting part 83 of the plate terminal 80 are opened inside the cover part 30 so that the axis of the hole coincides with the axial direction. The first hole portion 300 and the second hole portion 310 formed in the above are aligned and fitted, and further deeply inserted and press-fitted. Further, the cover part 30 is lowered from the upper side of the pallet 100 while being fixed to a gripping jig such as a chuck, and the press-fitting part 73 and the press-fitting part 83 start to be fitted into the holes 300 and 310. After that, the terminals 70 and 80 are aligned with respect to the holes 300 and 310 by weakening the force holding the cover 30 by the chuck or the like. After the alignment state is achieved in this manner, the cover portion 30 is lowered again, and the press-fit portions 73 and 83 are deeply press-fitted into the hole portions 300 and 310, respectively.

  FIG. 16 is a bottom view showing the internal configuration of the cover part 30, that is, a view when the inside of the cover part 30 is viewed from below the cover part 30 in FIG. 14. As shown in FIG. 16, the inner shape of the first hole portion 300 is smaller than the outer shape of the press-fit portion 73 of the brush terminal 70, and the inner shape of the second hole portion 310 is the plate terminal 80. It is formed smaller than the outer shape of the press-fit portion 83. There are two first hole portions 300 corresponding to the number of positive and negative brush terminals 70, and are formed at positions corresponding to the press-fit portions 73, respectively. Similarly, there are two second hole portions 310 corresponding to the number of positive and negative plate terminals 80, and are formed at positions corresponding to the press-fit portions 83, respectively. For this reason, when the press-fitting part 73 and the press-fitting part 83 are press-fitted into the first hole part 300 and the second hole part 310, they are circumscribed in a state of being in close contact with the inner wall surfaces forming the respective hole parts. The axial movement of the terminal 70 and the plate terminal 80 is restricted.

  Furthermore, when the inside of the cover portion 30 is viewed from below upward, a taper surface 301 (conical shape) whose diameter increases around the opening portion of each first hole portion 300 as it goes downward from the opening portion. Similarly, a tapered surface 311 (a mortar-shaped surface) whose diameter increases toward the lower side from the opening is also formed around the opening of each second hole 310. . By these tapered surfaces 301 and 311, it is possible to satisfactorily perform the operation at the initial stage of insertion when the press-fit portions 73 and 83 are fitted into the hole portions 300 and 310.

  By assembling the cover part 30 by the above procedure, the press-fit parts 73 for the positive electrode and the negative electrode are pressed into the first hole part 300 and fixed, and the press-fit parts 83 for the positive electrode and the negative electrode are respectively fixed. As shown in FIGS. 18 and 19, the spring 41 and the subassembly 50 are reliably assembled to the cover part 30 by being press-fitted into the second hole 310 and fixed. FIG. 18 is a bottom view showing a state in which the subassembly 50 is assembled to the cover 30. 19 is a cross-sectional view taken along the line XIX-XIX in FIG.

  15 is detached from the pallet 100 and separated from the pallet 100, and then assembled to the housing 21 together with the pump unit 10 and the motor unit 20. In the housing 21, the pump unit 10 is assembled at the end on the pump unit 10 side, and the cover unit 30 is assembled at the end 21 a on the side opposite to the pump unit 10. Each end of the housing 21 to which the pump unit 10 and the cover unit 30 are assembled is caulked, and the pump unit 10 and the cover unit 30 are fixed integrally with the housing 21. The manufacture of the fuel pump 1 is completed through the above steps.

  According to the present embodiment, the method for manufacturing the fuel pump 1 includes a first assembly step of assembling the parts of the brush 60, the spring 41, and the terminals 70 and 80 on the cover portion 30, and after the first assembly step. A second assembly step in which the cover unit 30 is assembled to the motor unit 20 assembled integrally with the pump unit 10. The first assembly step uses the pallet 100, which is an assembly jig for positioning and arranging each of the components, and arranges the components at a predetermined position on the pallet 100; A wiring process for connecting the brush 60 and the terminals 70 and 80 on the pallet 100, and fixing for pressing and fixing the terminals 70 and 80, which are arranged at predetermined positions on the pallet 100 and already connected, to the cover 30. And a separation step of separating the cover part 30 and the pallet 100 after the fixing step.

  According to this, in the first assembly process of assembling the brush 60, the spring 41, and the terminals 70, 80 on the cover 30, the parts of the brush 60, the spring 41, the brush terminal 70, and the plate terminal 80 are placed on the pallet 100. Position and arrange to. Further, in the first assembly process, a connection process for connecting at least the brush 60, the brush terminal 70, and the plate terminal 80 is performed on each of the parts appropriately arranged on the pallet 100, and the pallet is assembled in a state where the respective parts are assembled. 100 can be properly placed. Thereafter, the terminals 70, 80 are press-fitted into and fixed to predetermined portions of the cover part 30, whereby the assembly product such as the brush 60 appropriately arranged on the pallet 100 can be fixed to the cover part 30. Thereafter, the pallet 100 is detached from the cover part 30 and separated from each other, whereby the assembly product and the cover part 30 are assembled as an integrated product.

  If the second assembling step for assembling the cover portion 30 integrated with the assembly product to the motor portion 20 by the manufacturing method including the assembling jig and the above steps is performed, the brush as in the above prior art is used. The bearing holder for fixing the assembly product such as the above can be made unnecessary, and the deterioration of the assemblability due to the reduction of parts can be solved. In other words, by implementing the process using the pallet 100 in the manufacturing method, it is possible to provide a fuel pump in which the function of the conventional bearing holder is integrated into the cover 30 and the bearing holder is eliminated. Therefore, as described above, it is possible to provide a method for manufacturing a fuel pump excellent in cost performance and productivity by reducing the number of parts.

  The pallet 100 includes a plurality of jigs, a pallet base 110, a brush terminal arrangement jig 130 (first terminal jig), and a plate terminal arrangement jig 140 (second terminal jig). The brush arrangement jig 150 and the like are combined. According to this, since the assembly jig is constituted by a combination of such a plurality of jigs, the brush 60, the spring 41, and the terminals 70 and 80 that require positioning are different in a plurality of types. An assembly jig that can flexibly cope with the case where it is necessary to cope with different shapes and positions. Therefore, it becomes easy to change the configuration of the assembly jig according to the type and number of components of the assembly product that needs to be assembled to the cover part 30, and the production of various types of fuel pumps and their productivity A manufacturing method contributing to improvement can be provided.

  In the fixing process, the brush terminal and plate terminal 80 are sandwiched and held by the pallet base 110, the brush terminal arrangement jig 130, and the plate terminal arrangement jig 140, which constitute a plurality of terminal holding jigs. In this state, it is press-fitted into the cover part 30, and the cover part 30 is separated from the pallet 100 by releasing the clamping state of the terminals 70 and 80 after the fixing process is completed.

  According to this, since the terminals 70 and 80 are clamped and held by the plurality of terminal holding jigs included in the pallet 100 in the fixing process, the terminals 70 and 80 are press-fitted into the cover portion 30. The press-fitting operation is performed in a state where the above is secured. Furthermore, when the clamping operation is released from the pallet 100 after the press-fitting, it is possible to smoothly shift to the next process. Therefore, the terminals 70 and 80 can be gripped and released smoothly with a simple configuration, which can contribute to an improvement in fuel pump productivity.

  The pallet 100 also includes a brush placement jig 150 that houses the brush 60 for positioning. In the arrangement step, the spring 41 is arranged in a space formed above the brush 60 by moving the brush arrangement jig 150 containing the brush 60 in the axial direction.

  According to this, the spring 41 and the brush 60 can be accommodated in the predetermined position of the cover part 30 so that the brush 60 can be urged | biased in the direction of the commutator 25, and there are few arrangement processes regarding the brush 60 and the spring 41. It can be carried out with a jig. For this reason, the management man-hour and the number of components of the pallet 100 can be reduced, and the productivity and cost can be improved.

  Further, in the above fixing step, a gripping jig such as a chuck that holds the cover 30 and moves in the vertical direction is used, and when the terminals 70 and 80 are press-fitted into the cover 30, each terminal When the terminals 70 and 80 start to fit into the holes 300 and 310 for press-fitting the 70 and 80, the force held by the gripping jig is loosened, and then the press-fitting of the terminals 70 and 80 is advanced. Thus, the movement of the cover part 30 by the holding jig is advanced.

  In the fixing process of fixing the assembly including the brush and the like to the cover part 30, the position and operation of the holding jig are adjusted so that the terminals 70 and 80 are at appropriate positions with respect to the holes 300 and 310. However, a slight shift may occur between the cores of the terminals 70 and 80 and the centers of the holes 300 and 310. Such a phenomenon is caused by various conditions when the terminals 70 and 80 are gripped by the gripping jig, for example, the gripping force, the arrangement state of the inclination of the terminals 70 and 80, the dust and dirt adhering to each part. to cause. Therefore, by performing such press-fitting, each terminal 70, 80 is loosened when the terminals 70, 80 begin to be fitted in the holes 300, 310 in the fixing process, thereby loosening the force held by the holding jig. It is possible to perform an adjustment in which the 80 cores are aligned so as to approach the centers of the hole portions 300 and 310. Therefore, in the press-fitting operation that proceeds thereafter, the terminals 70 and 80 can be evenly circumscribed with respect to the inner wall surfaces that form the holes 300 and 310. Therefore, the press-fitting operation of each terminal 70, 80 can be performed smoothly and the press-fitting can be performed normally.

  Further, the cover 30 is provided with holes 300 and 310 for press-fitting the terminals 70 and 80 in the fixing process, and a mortar-shaped surface is formed around the openings of the holes 300 and 310. Yes. According to this, since the mortar-shaped surface is formed around the opening of each hole 300, 310, the end of each terminal 70, 80 is to be fitted in each hole 300, 310 in the fixing process. Sometimes, the end portions of the terminals 70 and 80 are easily guided to the hole portions 300 and 310, contributing to a smooth press-fitting operation, and normal press-fitting can be performed.

  The means for connecting the connecting portions 71, 72, 82 to the wires 61 and the end portions 93, 94 of the winding 92 is not limited to the above-described heat caulking. For example, it may be performed by soldering, brazing, or the like.

  Further, in the assembly process, the brush 60, the brush terminal 70, the plate terminal 80, the choke coil 90, the cover 30 and the like are disposed from a position after being positioned at a predetermined position by a jig for gripping each component. And it is arranged.

DESCRIPTION OF SYMBOLS 1 ... Fuel pump 10 ... Pump part 20 ... Motor part 25 ... Commutator 30 ... Cover part 41 ... Spring (biasing member)
50 ... Subassembly 60 ... Brush 70 ... Brush terminal (terminal)
80 ... Plate terminal (terminal)
90 ... Choke coil 100 ... Pallet (assembly jig)
110 ... Pallet base (terminal holding jig)
130 ... Brush terminal placement jig (terminal holding jig)
140 ... Plate terminal placement jig (terminal holding jig)
150 ... Brush placement jig 300 ... First hole (press-fit hole)
310 ... second hole (press-fit hole)

Claims (6)

A pump unit that transports fuel; a motor unit that has a commutator and drives the pump unit; a brush that is slidably contacted with the commutator; and a bias that biases the brush toward the commutator A fuel pump comprising: a member; a terminal electrically connected to the brush; and a cover portion that is accommodated together with the brush so that the biasing member biases the brush,
A first assembling step for assembling the brush, the biasing member, and the terminal, and the cover portion after the first assembling step are assembled to the motor unit that is assembled integrally with the pump unit. A second assembly process,
The first assembly process includes
An assembly jig for positioning and arranging each of the brush, the biasing member, and the terminal is used, and the brush, the biasing member, and the terminal are placed at predetermined positions of the assembly jig. An arrangement process to arrange;
A wiring process for connecting the brush and the terminal;
A fixing step of press-fitting and fixing the terminal, which is disposed at the predetermined position and connected in the assembly jig, into the cover portion;
A separation step of separating the cover part and the assembly jig after the fixing step;
A method for manufacturing a fuel pump, comprising:   The method for manufacturing a fuel pump according to claim 1, wherein the assembly jig is configured by combining a plurality of jigs. In the fixing step, the terminal is press-fitted into the cover portion in a state of being held by being held by a plurality of terminal holding jigs,
3. The fuel pump according to claim 1, wherein the cover part is separated from the assembly jig by releasing the pinching state of the terminal after the fixing step. 4. Manufacturing method. The assembly jig includes a brush placement jig that houses the brush for the positioning;
The said urging member is arrange | positioned in the space formed above the said brush by moving the said brush arrangement | positioning jig | tool of the state which accommodated the said brush in the axial direction in the said arrangement | positioning process. The manufacturing method of the fuel pump as described in any one of Claims 1-3. In the fixing step, using a gripping jig that holds the cover part and moves it up and down,
When the terminal is press-fitted into the cover part, the holding force by the gripping jig is applied when the terminal starts to fit into a press-fitting hole provided in the cover part to press-fit the terminal. The fuel pump manufacturing method according to any one of claims 1 to 4, wherein the cover portion is moved by the gripping jig so as to be loosened and then press-fitted into the terminal. Method.   2. The cover part is provided with a press-fitting hole part for press-fitting the terminal in the fixing step, and a mortar-shaped surface is formed around the opening of the press-fitting hole part. The manufacturing method of the fuel pump as described in any one of Claim 5 to Claim 5.

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