A press-fitting tool for the ejector pump body and filter screen on a fuel pump

Abstract

The present invention relates to a press-fitting tool for an ejector pump body and a filter screen on a fuel pump, characterized in that it includes a tooling seat and a pressure head assembly disposed opposite each other, the tooling seat being provided with a first accommodating area for accommodating a vertically placed fuel pump and a second accommodating area for accommodating a horizontally placed fuel pump, the pressure head assembly including a first pressure head and a second pressure head, the first pressure head being located above the first accommodating area, and the second pressure head being located above the second accommodating area, the first pressure head and the second pressure head sliding relative to the tooling seat under the action of a driving member to press-fit the filter screen and the ejector pump body onto the fuel pump. Using the above-mentioned technical solution, the present invention provides a press-fitting tool for an ejector pump body and a filter screen on a fuel pump, which, through automatic assembly, ensures that the ejector pump body and the filter screen are accurately positioned and free of damage after being assembled to the fuel pump, thereby improving product quality.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel pumps, in particular to a press-fitting tool for an ejector pump body and a filter screen on a fuel pump. Background Art

[0002] Fuel pump is a professional term in the automotive parts industry. It is one of the basic components of the fuel injection system of electronic fuel injection vehicles. It is located inside the vehicle's fuel tank. The fuel pump works when the vehicle is started and the engine is running. The function of the fuel pump is to suck the fuel from the fuel tank, pressurize it, and then deliver it to the fuel supply pipe. It cooperates with the fuel pressure regulator to establish a certain fuel pressure.

[0003] Generally, a filter and a priming pump are installed at the fuel inlet of the fuel pump. The role of the priming pump is to assist the suction and delivery of fuel by generating negative pressure, ensuring the stable operation of the fuel pump. The role of the priming pump is more obvious, especially at high speeds or when the fuel supply demand is large. The filter is used to filter out impurities, dust, metal particles, etc. in the fuel before it enters the fuel pump, preventing these impurities from entering the fuel pump and the subsequent fuel system, reducing wear and damage to the fuel pump and injection system. Therefore, the installation of the filter and the priming pump is extremely important. The filter and the priming pump are both interference fit with the pump cover of the fuel pump. The existing installation method generally uses manual press-fitting, which makes it easy for the press-fitting to not be properly installed or to cause damage, and the press-fitting efficiency is also low. Summary of the Invention

[0004] Purpose of the present invention: In order to overcome the defects of the prior art, the present invention provides a press-fitting tool for the ejector pump body and filter screen on a fuel pump. Through automatic assembly, the ejector pump body and filter screen are accurately positioned on the fuel pump without damage, thereby improving product quality.

[0005] The technical solution of the present invention is: a press-fitting tool for an ejector pump body and a filter screen on a fuel pump, comprising a tooling seat and a pressure head assembly arranged relatively to each other, the tooling seat being provided with a first accommodating area for accommodating a vertically placed fuel pump and a second accommodating area for accommodating a horizontally placed fuel pump, the pressure head assembly comprising a first pressure head and a second pressure head, the first pressure head being located above the first accommodating area, and the second pressure head being located above the second accommodating area, the first pressure head and the second pressure head sliding relative to the tooling seat under the action of a driving member to press-fit the filter screen and the ejector pump body onto the fuel pump.

[0006] Using the above technical solution, the tooling seat is installed on the punch press. During assembly, a fuel pump is placed vertically in the first accommodating area, and a fuel pump is placed horizontally in the second accommodating area. The filter is placed above the fuel pump in the first accommodating area, and the ejector pump body is placed above the fuel pump in the second accommodating area. The driving member drives the first pressure head and the second pressure head to slide, the first pressure head contacts the filter, and the second pressure head contacts the ejector pump body, and the filter and the ejector pump body are pressed onto the corresponding fuel pump, so that the filter and the ejector pump body have an interference fit and are automatically pressed together. The orientation and angle of the filter and the ejector pump body after pressing are in place and highly consistent, which effectively improves product quality. The filter and the ejector pump body can be installed at the same time, which is more efficient.

[0007] Further configuration of the present invention: the workbench includes a base plate, a pedestal, a positioning block and a supporting block. The base, the positioning block and the supporting block are arranged in sequence with the base plate along the length direction of the base plate. A concave cavity is provided on the base to form the first accommodating area. The positioning block is provided with a first positioning groove, and the supporting block is provided with a second positioning groove. The two positioning grooves form the second accommodating area. A limiting rod is provided in the first positioning groove, and the second pressure head corresponds to the position of the first positioning groove.

[0008] By adopting the above-mentioned further arrangement, the fuel pump can be positioned to make its structure stable, facilitate the press-fitting of the filter screen and the ejector pump body, and ensure that the positions between the filter screen, the ejector pump body and the fuel pump are accurate and not offset. The limit rod ensures the vertical angle of the ejector pump body during installation, and prevents the ejector pump body from offsetting during the downward pressure of the second pressure head, resulting in press-fit misalignment.

[0009] The present invention is further provided with: the base, positioning block and support block are all detachably connected to the bottom plate, the bottom of the cavity is provided with a fixing hole and a plurality of first mounting through holes, and at least one first mounting through hole is passed through a fastener to connect the base and the bottom plate.

[0010] The above-mentioned further arrangement allows for a detachable connection for easy replacement, and can be suitable for fuel pumps of different models. The corresponding base, positioning block, and support block are installed according to the model of the fuel pump, and the fixing hole is plugged into the nozzle on the fuel pump, and the nozzle is inserted into the fixing hole, so that the fuel pump structure is stable and the orientation of each fuel pump remains consistent. In addition, more than one fixing hole can be provided to accommodate fuel pumps with different nozzle end covers.

[0011] The present invention is further provided with a concave positioning notch in the first positioning groove for positioning the ejector pump body, and both side walls of the second positioning groove are inclined to facilitate assembly of the fuel pump.

[0012] The above-mentioned further arrangement and positioning are further adopted to ensure accurate installation. The side wall of the second positioning groove is inclined, which can adapt to fuel pumps of various specifications and diameters, and has better universality.

[0013] The present invention is further provided with: the pressure head assembly also includes a mounting plate, the first pressure head and the second pressure head are mounted on the mounting plate, the lower end surface of the first pressure head is higher than the lower end surface of the second pressure head, and the lower end surface of the second pressure head is provided with a bayonet for the injection pump body to be snapped into.

[0014] By adopting the above-mentioned further arrangement, the two pressure heads can be synchronously driven to slide by a driving member, which saves costs. Since the contact part between the ejector pump body and the second pressure head is arranged in the form of a disc, a bayonet is provided to facilitate the insertion of the disc of the ejector pump body, thereby avoiding slipping of the pressure head during press-fitting, and making the structure between the ejector pump body and the fuel pump more solid after press-fitting.

[0015] The present invention is further configured as follows: a first long groove running through from top to bottom is provided on the mounting plate, a first connecting hole is provided on the first pressure head, a bolt is passed through the first long groove to mount the first pressure head on the mounting plate, a second mounting through hole is provided on the mounting plate, a connecting rod is provided on the second pressure head, the connecting rod is passed through the second mounting through hole, a second connecting hole communicating with the second mounting through hole is provided on the side wall of the mounting plate, a bolt is passed through the second connecting hole to mount the second pressure head on the mounting plate.

[0016] With the above-mentioned further setting, the setting of the first mounting long groove can adjust the installation position of the first pressure head and the mounting plate, which can be used to install different first pressure heads, and the second pressure head can be fixed by tightening the bolts from the side to facilitate installation.

[0017] The present invention is further provided with at least one second long groove being provided on the tooling seat.

[0018] The above-mentioned further arrangement is adopted to facilitate the installation of the tooling seat on the punch press. Bolts are passed through the second long groove for installation, and the position of the bolts can be adjusted, with little installation limitation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a specific embodiment of the present invention;

[0020] Figure 2 A schematic diagram of a tooling seat according to a specific embodiment of the present invention;

[0021] Figure 3 It is a side view of a tooling seat according to a specific embodiment of the present invention;

[0022] Figure 4 is a schematic diagram of a pressure head assembly according to a specific embodiment of the present invention;

[0023] Figure 5 Schematic diagram of a first pressing head and a mounting plate according to a specific embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of an assembled fuel pump according to a specific embodiment of the present invention.

[0025] In the figure, 1. tooling seat; 11. second long groove; 2. pressure head assembly; 21. first pressure head; 211. first connecting hole; 22. second pressure head; 221. bayonet; 222. connecting rod; 23. mounting plate; 232. second mounting through hole; 233. first long groove; 234. second connecting hole; 3. bottom plate; 4. base; 41. concave cavity; 411. fixing hole; 412. first mounting through hole; 5. positioning block; 51. first positioning groove; 511. positioning notch; 6. support block; 61. second positioning groove; 7. limit rod; 100. fuel pump; 300. ejector pump body; 400. filter. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in this embodiment with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0027] It should be noted that in the description of the present invention, all directional indications (such as up, down, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being described. In the description of this disclosure, "several" means at least two, such as two or three, unless otherwise specifically defined.

[0029] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] like Figure 1-6As shown, a press-fitting tool for an induced pump body and a filter screen on a fuel pump comprises a tooling seat 1 and a pressure head assembly 2 arranged relatively to each other, the tooling seat 1 being provided with a first accommodating area for accommodating a vertically placed fuel pump 100 and a second accommodating area for accommodating a horizontally placed fuel pump 100, the pressure head assembly 2 comprising a first pressure head 21 and a second pressure head 22, the first pressure head 21 being located above the first accommodating area, the second pressure head 22 being located above the second accommodating area, the first pressure head 21 and the second pressure head 22 sliding relative to the tooling seat 1 under the action of a driving member to press-fit the filter screen 400 and the induced pump body 300 onto the fuel pump, the driving member is not shown in the figure, and may be a cylinder, or a motor, an electric cylinder, etc. In this application, a cylinder drive is preferably used, which can drive the pressure head assembly to slide more quickly, and the pressure head can be driven to slide, and the tooling seat 1 is installed on the punch press, the driving member is not shown in the figure, and may be a cylinder, or a motor, an electric cylinder, etc. At least one second long groove 11 is also provided on the tooling seat 1, and bolts are passed through the second long groove 11 to install the tooling seat 1 on the punch press. The position of the bolts can be adjusted, and the installation limitation is small. During assembly, one fuel pump is placed vertically in the first accommodating area, and the other fuel pump is placed horizontally in the second accommodating area. The filter is placed above the fuel pump in the first accommodating area, and the ejector pump body is placed above the fuel pump in the second accommodating area. The driving member drives the first pressure head 21 and the second pressure head 22 to slide, and the first pressure head 21 contacts the filter, and the second pressure head 22 contacts the ejector pump body, and the filter and the ejector pump body are pressed onto the corresponding fuel pump, so that the filter and the ejector pump body have an interference fit and are automatically pressed. The orientation and angle of the filter and the ejector pump body after pressing are in place, and the consistency is high, which effectively improves the product quality, and the filter and the ejector pump body can be installed at the same time, which is more efficient.

[0031] The tooling seat 1 includes a base plate 3, a base 4, a positioning block 5 and a support block 6. The base 4, the positioning block 5 and the support block 6 are arranged in sequence along the length direction of the base plate 3. The base 4 is provided with a concave cavity 41 to form the first accommodating area. The positioning block 5 is provided with a first positioning groove 51, and the support block 6 is provided with a second positioning groove 61. The two positioning grooves form the second accommodating area. A limiting rod 7 is vertically provided in the first positioning groove 51. The second pressure head 22 corresponds to the position of the first positioning groove 51, which can be used to position the fuel pump. The position of the filter screen and the ejector pump body is stable, which is convenient for the press-fitting of the filter screen and the ejector pump body. The position between the filter screen, the ejector pump body and the fuel pump is accurate and does not deviate. When the ejector pump body is installed, it is located on the right side of the limit rod and is set in conflict with the limit plate. The limit rod 7 ensures the vertical angle of the ejector pump body when it is installed, and prevents the second pressure head 22 from deviating from the ejector pump body during the downward pressure, resulting in press-fitting misalignment. The second pressure head is located behind the limit plate; the base 4, the positioning block 5 and the support block 6 are all detachably connected to the bottom plate 3. The bottom plate 3 is provided with a countersunk hole. The base 4, the positioning block 5 and the support block 6 are all detachably connected to the bottom plate 3. The support blocks 6 are connected to the base plate 3 by screws. The screws are inserted from the bottom of the base plate 3. The screws are located in the countersunk holes and are not exposed. The bottom of the cavity 41 is provided with a fixing hole 411 and a plurality of first mounting through holes 412. At least one first mounting through hole 412 is penetrated with a fastener to connect the base 4 and the base plate 3. The fastener is provided with a screw, which is detachable and easy to replace. It can be applied to different types of fuel pumps. The corresponding base 4, positioning block 5 and support block 6 are installed according to the model of the fuel pump. The fixing hole 411 is plugged into the nozzle on the fuel pump. The fuel nozzle is inserted into the fixing hole 411, so that the fuel pump structure is stable and the orientation of each fuel pump is consistent. In addition, more than one fixing hole 411 can be provided to adapt to fuel pumps with different nozzle end covers. A concave positioning notch 51 is provided in the first positioning groove 51 for positioning the ejector pump body. The two side walls of the second positioning groove 61 are inclined to facilitate the assembly of the fuel pump and further positioning, so that the installation is accurate. The side walls of the second positioning groove 61 are inclined to adapt to fuel pumps of various specifications and diameters, and the universal type is better.

[0032] The pressure head assembly 2 also includes a mounting plate 23, the first pressure head 21 and the second pressure head 22 are mounted on the mounting plate 23, the lower end surface of the first pressure head 21 is higher than the lower end surface of the second pressure head 22, and the lower end surface of the second pressure head 22 is provided with a bayonet 221 for the ejector pump body to be snapped in, and the two pressure heads can be synchronously driven to slide by a driving member, saving costs. Since the contact portion between the ejector pump body and the second pressure head 22 is a disc, the bayonet 221 is provided to facilitate the disc of the ejector pump body to be snapped in, thereby avoiding slipping when the pressure heads are press-fitted, and making the structure between the ejector pump body and the fuel pump more secure after press-fitting; a first long groove 233 is provided on the mounting plate 23, and a first connecting hole 211 is provided on the first pressure head 21, and a bolt is passed through the first long groove 233 to fix the first pressure head 21 It is installed on the mounting plate 23, and a second mounting through hole 232 is opened on the mounting plate 23. The second pressure head 22 is provided with a connecting rod 222, and the connecting rod 222 is passed through the second mounting through hole 232. A second connecting hole 234 communicating with the second mounting through hole 232 is provided on the side wall of the mounting plate 23. A bolt is passed through the second connecting hole 234 to mount the second pressure head 22 on the mounting plate 23. The bolt is inserted from the second connecting hole 234 and extends into the second mounting through hole 232, and abuts against the connecting rod 222 to realize the installation of the second pressure head 22. The setting of the first mounting long groove can adjust the installation position of the first pressure head 21 and the mounting plate 23, and can be used to install different first pressure heads 21. The second pressure head 22 is fixed by tightening the bolt from the side for easy installation.

Claims

1. A press-fitting tool for the ejector pump body and filter screen on a fuel pump, characterized in that: The invention comprises a tooling seat (1) and a pressure head assembly (2) arranged relatively to each other, wherein the tooling seat (1) is provided with a first accommodating area for accommodating a vertically placed fuel pump (100) and a second accommodating area for accommodating a horizontally placed fuel pump (100), and the pressure head assembly (2) comprises a first pressure head (21) and a second pressure head (22), wherein the first pressure head (21) is located above the first accommodating area, and the second pressure head (22) is located above the second accommodating area, and the first pressure head (21) and the second pressure head (22) slide relative to the tooling seat (1) under the action of a driving member to press-fit the filter screen and the ejector pump body onto the fuel pump, and the tooling seat (1) comprises a bottom plate (3), a base (4), a positioning block (5) and a support block (6), wherein the base (4), the positioning block (5) and the support block (6) are arranged in sequence along the length direction of the bottom plate (3), and the base (4) is provided with a concave cavity (4 1) forming the first accommodating area, the positioning block (5) is provided with a first positioning groove (51), the support block (6) is provided with a second positioning groove (61), the two positioning grooves forming the second accommodating area, the first positioning groove (51) is vertically provided with a limit rod (7), the second pressure head (22) corresponds to the position of the first positioning groove (51), the first positioning groove (51) is provided with a concave positioning notch (511) for positioning the ejector pump body, the two side walls of the second positioning groove (61) are inclined to facilitate the assembly of the fuel pump, the pressure head assembly (2) also includes a mounting plate (23), the first pressure head (21) and the second pressure head (22) are mounted on the mounting plate (23), the lower end surface of the first pressure head (21) is higher than the lower end surface of the second pressure head (22), and the lower end surface of the second pressure head (22) is provided with a bayonet (221) for the ejector pump body to be snapped into.

2. The press-fitting tool for the ejector pump body and filter screen on the fuel pump according to claim 1, characterized in that: The base (4), positioning block (5) and supporting block (6) are all detachably connected to the bottom plate (3); a fixing hole (411) and a plurality of first mounting through holes (412) are provided at the bottom of the cavity (41); a fastener is passed through at least one of the first mounting through holes (412) to connect the base (4) and the bottom plate (3).

3. The press-fitting tool for the ejector pump body and filter screen on the fuel pump according to claim 1, characterized in that: The mounting plate (23) is provided with a first long slot (233) extending vertically therethrough, the first pressure head (21) is provided with a first connecting hole (211), a bolt is passed through the first long slot (233) to mount the first pressure head (21) on the mounting plate (23), a second mounting through hole (232) is provided on the mounting plate (23), a connecting rod (222) is provided on the second pressure head (22), the connecting rod (222) is passed through the second mounting through hole (232), a second connecting hole (234) communicating with the second mounting through hole (232) is provided on the side wall of the mounting plate (23), a bolt is passed through the second connecting hole (234) to mount the second pressure head (22) on the mounting plate (23).

4. The press-fitting tool for the ejector pump body and filter screen on the fuel pump according to claim 1, 2 or 3, characterized in that: At least one second long groove (11) is also provided on the tooling seat (1).

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