Angle positioning tool for oil inlet pipe joint of high-pressure fuel pump

Abstract

The utility model relates to the technical field of automobile part positioning, and discloses an angle positioning tool for an oil inlet pipe joint of a high-pressure fuel pump, which comprises a tool bottom plate, the bottom edge of a positioning side plate is fixedly connected with the tool bottom plate, and the surface of the positioning side plate is provided with an avoiding through hole along the thickness direction. A plurality of positioning pins matched with positioning holes in the end face of the fuel pump are arranged on the surface of the positioning side plate around the avoiding through hole. The push-pull type pressing device is installed on the surface of the tool bottom plate, the push-pull type pressing device and the positioning side plate are oppositely arranged to form a limiting area of the fuel pump, and the push-pull type pressing device is used for selectively applying clamping thrust to the fuel pump to the limiting area; the limiting rod is installed on the surface, close to the limiting area, of the tool bottom plate and used for positioning before the fuel pump pipe joint is tightened according to the preset angle, accurate positioning and fixing of a fuel pump are achieved through the tool, displacement or loosening of the fuel inlet pipe joint when the fuel inlet pipe joint is greatly impacted by the torque of a tightening gun is avoided, and the percent of pass of installation of the fuel inlet pipe joint is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to automobile parts positioning technical field, especially a kind of angle positioning tool of high-pressure fuel pump oil inlet pipe joint. BACKGROUND

[0002] High-pressure fuel pump is one of engine core components, and oil passage installation failure can cause the entire engine to leak oil, affect engine performance, when existing fuel pump oil inlet pipe joint fixing bolt final tightening, fuel pump front end surface and side surface positioning contact, operator left hand holds fuel pump fixed, simultaneously hold electric gun head and enclose bolt limit, copper positioning rod limits fuel pump joint to keep set angle, right hand operates electric gun and tightens;When oil inlet pipe joint is impacted by tightening gun torque, copper positioning rod reverse force makes joint deviate original position, fuel pump breaks away from operator left hand pressing force, so that fuel pump is released from operator's hand, leading to the angle of oil inlet pipe joint and oil pump exceeds 15±5 ° angle range, so that the angle of oil inlet pipe joint is out of tolerance, which will cause misalignment of joint and oil inlet pipe assembly, affect the assembly of the whole machine, and a large number of components are installed near the engine fuel pump, and the structure is compact, if the angle is out of tolerance, it will cause interference between oil inlet pipe joint and other components.

[0003] Therefore, under the premise of fast assembly main line rhythm and high efficiency of PUMA engine, the existing assembly line fuel pump oil inlet pipe joint installation rhythm and quality cannot meet the workshop demand, and the angle out of tolerance leads to intensified contradiction of rework, therefore, new tooling needs to be made to improve assembly qualification rate, reduce operation time, meet the joint installation demand while saving assembly main line production efficiency. UTILITY MODEL CONTENTS

[0004] The utility model aims at least to solve one or more technical problems existing in the prior art, and therefore, the utility model provides an angle positioning tool for high-pressure fuel pump oil inlet pipe joint.

[0005] In the first aspect, the application provides an angle positioning tool for high-pressure fuel pump oil inlet pipe joint, comprising:

[0006] Tooling bottom plate;

[0007] Positioning side plate, the bottom edge of the positioning side plate is fixedly connected with the tooling bottom plate, an avoiding through hole is formed in the surface of the positioning side plate along the thickness direction, and a plurality of positioning pins matched with fuel pump end surface positioning holes are arranged around the avoiding through hole on the surface of the positioning side plate;

[0008] Push-pull type presser, installed on the surface of the tooling bottom plate, and the push-pull type presser is arranged opposite to the positioning side plate to form a limiting area of the fuel pump, wherein the push-pull type presser is used to selectively apply clamping thrust to the fuel pump towards the limiting area;

[0009] A limiting rod is installed on the surface of the tooling base plate near the limiting area, and is used for positioning the fuel pump pipe joint before being tightened at a preset angle.

[0010] In some embodiments that can be implemented, further comprising:

[0011] A support block is fixedly connected to the surface of the tooling base plate, and is used for mounting and fixing the push-pull type compression device.

[0012] In some embodiments that can be implemented, a support pad is arranged at the connection between the support block and the tooling base plate, and the surfaces opposite to the positioning side plates of the support block are parallel to each other.

[0013] In some embodiments that can be implemented, the push-pull type compression device comprises a push-pull rod, an operating handle, a fixed seat, and a linkage assembly, the fixed seat is fixedly connected to the support block, one end of the push-pull rod is rotatably connected to one end of the operating handle through the fixed seat, and the linkage assembly is connected to the fixed seat and one end of the operating handle at two ends thereof.

[0014] In some embodiments that can be implemented, the linkage assembly comprises a first linkage and a second linkage, one end of each of the first linkage and the second linkage is rotatably connected to the two sides of the fixed seat, the operating handle comprises a bent connecting jaw, the open end of the connecting jaw is rotatably clamped on the two sides of the end of the push-pull rod, and the clamping arm end of the connecting jaw is rotatably connected to the other end of each of the first linkage and the second linkage.

[0015] In some embodiments that can be implemented, the push-pull type compression device further comprises a buffer screw, one end of the buffer screw is fixedly connected to the end of the push-pull rod away from the fixed seat.

[0016] In some embodiments that can be implemented, a threaded hole is formed in the push-pull rod along the central axis direction, and the buffer screw is inserted into the threaded hole and is threadedly connected to the push-pull rod.

[0017] In some embodiments that can be implemented, further comprising:

[0018] A pad block is arranged on the surface of the tooling base plate in the limiting area, and is used for supporting the fuel pump.

[0019] In some embodiments that can be implemented, the pad block comprises:

[0020] A first pad block is arranged on the surface of the tooling base plate near the positioning side plate.

[0021] A second pad block is arranged on the surface of the tooling base plate near the limiting rod.

[0022] In some possible embodiments, the diameter of the clearance through hole is larger than the diameter of the outer contour of the oil pump sprocket projected along the central axis.

[0023] Compared with the prior art, the technical solutions provided in the embodiments of this application have at least the following beneficial effects:

[0024] 1) The angle positioning fixture of this application forms a limiting area for the high-pressure fuel pump by setting positioning side plates and push-pull clamps on the base plate of the fixture. By setting clearance through holes and positioning pins on the positioning side plates, after the fuel pump is placed in the limiting area, the positioning pins are precisely fixed and clamped with the corresponding holes on the side end of the fuel pump, ensuring high-precision positioning of the fuel pump. Furthermore, by pressing one end of the push-pull clamp against the tail of the fuel pump, the fuel pump is clamped to ensure that it can withstand a large external force without displacement or loosening after being fixed. The setting of clearance through holes allows the fuel pump sprocket to pass through, so the main line fuel pump sprocket and fuel pump nut are moved to this assembly fixture for pre-tightening, improving the main line production efficiency.

[0025] 2) By setting a limit rod, a copper positioning block is set on the top of the limit rod. After the fuel pump inlet pipe connector is pre-tightened to the corresponding threaded hole of the fuel pump, the connector contacts and is limited by the copper positioning block. The positioning block is parallel to the center line of the pipe connector, thus ensuring that the pipe connector is tightened at the set angle. The positioning block is fixedly connected to the top of the limit rod by bolts, which facilitates angle adjustment to adapt to different models of fuel pumps, and at the same time improves production efficiency.

[0026] 3) Depending on the height of different fuel pump models, different numbers of support shims can be placed at the support block connection to adjust the height of the push-pull quick clamp and achieve compatibility with different fuel pump models; by setting shims in the limit area, after the fuel pump is assembled with the positioning side plate, the lower part of the fuel pump contacts the shims, which makes it convenient for employees to operate the push-pull clamp to clamp the fuel pump and avoid the fuel pump being suspended in the air before clamping, which could damage the spindle and the fuel pump.

[0027] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the angle positioning tooling according to an embodiment of this application;

[0030] Figure 2 This is a schematic diagram of the first structure of the fuel pump when it is fixed by the angle positioning fixture according to an embodiment of this application;

[0031] Figure 3 This is a schematic diagram of the second structure of the fuel pump when it is fixed by the angle positioning fixture according to an embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the angle positioning tooling according to an embodiment of this application;

[0033] Figure 5 This is an exploded structural diagram of the angle positioning tooling shown in the embodiments of this application;

[0034] Figure 6 This is a schematic diagram of the structure of the limiting rod according to an embodiment of this application.

[0035] Figure label:

[0036] 100. Angle positioning fixture; 110. Fixture base plate; 120. Positioning side plate; 121. Clearance through hole; 122. Positioning pin; 130. Support block; 131. Support shim;

[0037] 140. Push-pull clamp; 141. Buffer screw; 142. Push-pull rod; 143. Operating handle; 1431. Connecting jaw; 14311. Open end; 14312. Clamping arm end; 144. Fixed base; 145. Linkage assembly; 1451. First link; 1452. Second link;

[0038] 150. Limiting rod; 151. Limiting rod body; 152. Copper positioning block; 160. Pad; 161. First pad; 162. Second pad;

[0039] 200. Fuel pump; 210. Fuel pump body; 220. Fuel pump sprocket. Detailed Implementation

[0040] The embodiments of this utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. It should be understood that the specific embodiments described herein are merely for explaining this application and are not intended to limit this application.

[0041] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0043] Please see Figures 1 to 3 This embodiment provides an angle positioning fixture for a high-pressure fuel pump inlet pipe connector. The angle positioning fixture 100 includes a fixture base plate 110 and a positioning side plate 120. The bottom edge of the positioning side plate 120 is fixedly connected to the fixture base plate 110. An avoidance through hole 121 is opened on the surface of the positioning side plate 120 along the thickness direction. A plurality of positioning pins 122 that cooperate with the positioning holes on the end face of the fuel pump 200 are provided around the avoidance through hole 121 on the surface of the positioning side plate 120. A push-pull clamping device 140 is installed on the surface of the fixture base plate 110 and is arranged opposite to the positioning side plate 120 to form a limiting area for the fuel pump 200. The push-pull clamping device 140 is used to selectively apply a clamping force to the fuel pump 200 toward the limiting area. A limiting rod 150 is installed on the surface of the fixture base plate 110 near the limiting area. The limiting rod 150 is used for positioning the fuel pump 200 pipe connector before tightening at a preset angle.

[0044] In some embodiments, the bottom edge of the positioning side plate 120 is fixedly connected to one edge of the tooling base plate 110 to form an L-shape, that is, the positioning side plate 120 is perpendicular to the tooling base plate 110. Multiple mounting through holes can be formed on the surface of the tooling base plate 110 to facilitate the installation and fixing of the entire angle positioning tooling 100 in the corresponding working area through the tooling base plate 110.

[0045] Optionally, the angle positioning fixture 100 may also include a support block 130, which is fixedly connected to the surface of the fixture base plate 110. The support block 130 is used for the installation and fixing of the push-pull clamp 140. A support pad 131 is provided at the connection between the support block 130 and the fixture base plate 110. The surfaces of the support block 130 and the positioning side plate 120 are parallel to each other. Specifically, the bottom of the support block 130 can be fixedly connected to the fixture base plate 110 by bolts. Multiple support pads 131 can be placed between the support block 130 and the fixture base plate 110 as needed to adjust the height of the push-pull clamp 140.

[0046] Thus, when dealing with different models of fuel pump 200, since the height of different models of fuel pump 200 may differ, different numbers of support shims 131 can be placed at the connection of the support block 130 to adjust the height of the push-pull quick clamp, thereby achieving compatibility with different models of fuel pump 200.

[0047] Optionally, the diameter of the clearance through hole 121 on the surface of the positioning side plate 120 along the thickness direction is larger than the outer contour diameter of the fuel pump 200 main shaft. The surface of the positioning side plate 120 is provided with a number of positioning pins 122 that cooperate with the positioning holes on the end face of the fuel pump 200 around the clearance through hole 121. The number of positioning pins 122 can be set to 3. By setting the clearance through hole 121 and positioning pins 122 on the positioning side plate 120, after the fuel pump body 210 is placed in the limiting area, the positioning pins 122 are precisely fixed and clamped with the corresponding holes on the side end face of the fuel pump, ensuring high-precision positioning of the fuel pump. The diameter of the clearance through hole 121 is larger than the outer contour diameter of the fuel pump sprocket projected along the central axis, so the fuel pump sprocket 220 can pass through the clearance through hole 121. Therefore, the main line fuel pump sprocket 220 and the fuel pump nut can be moved to this assembly tool for pre-tightening, improving the main line production efficiency.

[0048] In some embodiments, the angle positioning fixture 100 may further include a pad 160 disposed on the surface of the fixture base plate 110 within the limiting area. The pad 160 is disposed to support the fuel pump 200. The pad 160 may include a first pad 161 and a second pad 162. The first pad 161 is disposed on the surface of the fixture base plate 110 near the positioning side plate 120; the second pad 162 is disposed on the surface of the fixture base plate 110 near the limiting rod 150.

[0049] Thus, by setting a pad 160 in the limiting area, after the fuel pump 200 is assembled with the positioning side, the lower part of the fuel pump 200 contacts the pad, which makes it convenient for employees to operate the push-pull clamp 140 to clamp the fuel pump 200, and avoids the fuel pump 200 being suspended in the air before clamping, which could damage the spindle and the fuel pump 200.

[0050] In some embodiments, the push-pull clamp 140 includes a push-pull rod 142, an operating handle 143, a fixed base 144, and a connecting rod assembly 145. The fixed base 144 is fixedly connected to the support block 130. One end of the push-pull rod 142 passes through the fixed base 144 and is rotatably connected to one end of the operating handle 143. The two ends of the connecting rod assembly 145 are respectively connected to the fixed base 144 and one end of the operating handle 143. Specifically, the connecting rod assembly 145 includes a first connecting rod 1451 and a second connecting rod 1452. One end of the first connecting rod 1451 and the second connecting rod 1452 are rotatably connected to both sides of the fixed base 144. The operating handle 143 includes a bent connecting jaw 1431. The open end 14311 of the connecting jaw 1431 is rotatably clamped on both sides of the end of the push-pull rod 142. The clamping arm end 14312 of the connecting jaw 1431 is rotatably connected to the other end of the first connecting rod 1451 and the second connecting rod 1452.

[0051] Optionally, the push-pull clamp 140 also includes a buffer screw 141, one end of which is fixedly connected to the end of the push-pull rod 142 away from the fixed seat 144. The push-pull rod 142 has a threaded hole along the central axis, and the buffer screw 141 is inserted into the threaded hole and threadedly connected to the push-pull rod 142.

[0052] Thus, in this embodiment, when the push-pull rod 142 is in the extended state, the connection points of the open end 14311 and the clamping arm end 14312 of the connecting jaw 1431, the first connecting rod 1451, the second connecting rod 1452, and the fixed seat 144 are at the same horizontal level. When the operating handle 143 is rotated vertically, the end of the first connecting rod 1451 and the second connecting rod 1452 near the connecting jaw 1431 is lifted, and at the same time, the clamping arm end 14312 of the connecting jaw 1431 is rotated vertically with the open end 14311 as the rotation point, so that the connection points of the open end 14311, the clamping arm end 14312, the first connecting rod 1451, the second connecting rod 1452, and the fixed seat 144 form a triangle, and simultaneously drive the push-pull rod 142 to move backward, so that the push-pull rod 142 retracts and drives the buffer screw 141 away from the fuel pump 200.

[0053] Meanwhile, when the operating handle 143 is lifted, the buffer screw 141 at one end of the push-pull rod 142 clamps and fixes the fuel pump 200. One end of the buffer screw 141 can be made of nylon material. In this way, the push-pull clamp 140 presses against the tail of the fuel pump 200, clamping it to ensure that the fuel pump can withstand a large external force after it is fixed without displacement or loosening. The setting of the through hole 121 allows the fuel pump sprocket to pass through. Therefore, the main line fuel pump sprocket and fuel pump nut are moved to this assembly tooling for pre-tightening, improving the main line production efficiency.

[0054] Please see Figure 6 The limiting rod 150 includes a limiting rod body 151 and a copper positioning block 152. The copper positioning block 152 is connected to the limiting rod body 151 by bolts. Thus, with the limiting rod 150 and the copper positioning block 152 on the top, after the fuel pump inlet pipe connector is pre-tightened to the corresponding threaded hole of the fuel pump, the connector contacts and is limited by the copper positioning block 152. The copper positioning block 152 is parallel to the center line of the pipe connector, thus ensuring that the pipe connector is tightened at the set angle. The positioning block is fixedly connected to the top of the limiting rod by bolts, which facilitates angle adjustment and adapts to different models of fuel pumps.

[0055] In actual operation, the above-mentioned tooling is used as follows: The operator takes the fuel pump out of the material box and uses an electric gun to loosen a bolt at the tail of the fuel pump. The white plastic ring attached to the bolt is removed (note that the composite washer should not be soiled and can still be used). The bolt passes through the middle through hole of the fuel pump inlet pipe connector and is reinstalled into the fuel pump threaded hole and gently pre-tightened by two to four threads. The fuel pump is fixed on the three copper positioning pins on the positioning side plate. The operator holds the fuel pump with his left hand and pushes the red handle of the push-pull quick clamp upward with his right hand to clamp and fix the fuel pump. The pipe connector is placed against the copper positioning block, and the bolt is tightened with an electric gun to fix the pipe connector. Then, a fuel pump sprocket 220 is taken. The keyway of the inner diameter of the sprocket is aligned with the protruding flat key of the main shaft of the fuel pump body 210 and then gently pushed in. Then, a fuel pump nut is taken and threaded with the fuel pump main shaft and pre-tightened by about four threads. Note that the gear side of the fuel pump sprocket is away from the fuel pump, and the large surface of the fuel pump nut faces the fuel pump. The above operations achieve the correct positioning of the fuel pump inlet pipe joint and the pre-tightening of the fuel pump sprocket.

[0056] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model.

[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0058] Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The reference to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily indicate the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0059] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An angle positioning fixture for a high-pressure fuel pump inlet pipe joint, characterized in that, include: Tooling base plate (110); The positioning side plate (120) has its bottom edge fixedly connected to the tooling base plate (110). The positioning side plate (120) has a clearance through hole (121) along its thickness direction on its surface. The positioning side plate (120) has a plurality of positioning pins (122) around the clearance through hole (121) that cooperate with the positioning hole on the end face of the fuel pump. A push-pull clamp (140) is mounted on the surface of the tooling base plate (110), and the push-pull clamp (140) is disposed opposite to the positioning side plate (120) to form a limiting area for the fuel pump, wherein the push-pull clamp (140) is used to selectively apply a clamping force to the fuel pump toward the limiting area; A limiting rod (150) is installed on the surface of the tooling base plate (110) near the limiting area. The limiting rod (150) is used for positioning the fuel pump pipe joint before tightening it at a preset angle.

2. The angle positioning fixture for a high-pressure fuel pump inlet pipe joint according to claim 1, characterized in that, Also includes: Support block (130) is fixedly connected to the surface of the tooling base plate (110) and is used for the installation and fixing of the push-pull clamp (140).

3. The angle positioning fixture for a high-pressure fuel pump inlet pipe joint according to claim 2, characterized in that, A support pad (131) is provided at the connection between the support block (130) and the tooling base plate (110), and the surfaces of the support block (130) and the positioning side plate (120) are parallel to each other.

4. The angle positioning fixture for a high-pressure fuel pump inlet pipe joint according to claim 2 or 3, characterized in that, The push-pull clamp (140) includes a push-pull rod (142), an operating handle (143), a fixed seat (144), and a connecting rod assembly (145). The fixed seat (144) is fixedly connected to the support block (130). One end of the push-pull rod (142) passes through the fixed seat (144) and is rotatably connected to one end of the operating handle (143). The two ends of the connecting rod assembly (145) are respectively connected to the fixed seat (144) and one end of the operating handle (143).

5. The angle positioning fixture for a high-pressure fuel pump inlet pipe joint according to claim 4, characterized in that, The linkage assembly (145) includes a first linkage (1451) and a second linkage (1452); one end of the first linkage (1451) and the second linkage (1452) are rotatably connected to both sides of the fixed base (144); the operating handle (143) includes a bent connecting claw (1431), the open end (14311) of the connecting claw (1431) is rotatably clamped to both sides of the end of the push-pull rod (142); the clamping arm end (14312) of the connecting claw (1431) is rotatably connected to the other end of the first linkage (1451) and the second linkage (1452).

6. The angle positioning fixture for a high-pressure fuel pump inlet pipe joint according to claim 4, characterized in that, The push-pull clamp (140) also includes a buffer screw (141), one end of which is fixedly connected to the end of the push-pull rod (142) away from the fixed seat (144).

7. The angle positioning fixture for a high-pressure fuel pump inlet pipe joint according to claim 6, characterized in that, The push-pull rod (142) has a threaded hole along the central axis, and the buffer screw (141) is inserted into the threaded hole and threadedly connected to the push-pull rod (142).

8. The angle positioning fixture for a high-pressure fuel pump inlet pipe joint according to claim 1, characterized in that, Also includes: A pad (160) is disposed on the surface of the tooling base plate (110) within the limiting area, and the pad (160) is used to support the fuel pump.

9. The angle positioning fixture for a high-pressure fuel pump inlet pipe joint according to claim 8, characterized in that, The pad (160) includes: The first pad (161) is disposed on the surface of the tooling base plate (110) near the positioning side plate (120); The second pad (162) is disposed on the surface of the tooling base plate (110) near the limiting rod (150).

10. The angle positioning fixture for a high-pressure fuel pump inlet pipe joint according to claim 1, characterized in that, The diameter of the clearance through hole (121) is greater than the diameter of the outer contour of the oil pump sprocket projected along the central axis.

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