Fuel pump guide rod press fitting device

Abstract

The fuel pump guide rod press-fitting device comprises a bottom plate, an upper cover seat is arranged on the bottom plate in a sliding mode, an upper cover groove used for containing an upper cover is formed in the upper cover seat, a guide rod seat and a lining seat are arranged on the side, in the sliding direction of the upper cover seat, of the bottom plate, and a first driving cylinder is arranged on the side, away from the guide rod seat, of the lining seat of the bottom plate. A push plate is arranged at the end of a piston rod of the first driving cylinder, a plurality of ejector rods matched with the guide rods are arranged on the push plate, a filter screen groove used for bearing the filter screen frame is formed in the push plate, and a second driving cylinder is arranged on the side, away from the guide rod base, of the upper cover base of the bottom plate. The ejector rod and the filter screen frame are simultaneously driven through the first driving cylinder, synchronous operation of pressing the guide rod into the upper cover and pressing the filter screen frame into the lining is achieved, press fitting of the breather valve is synchronously completed through the second driving cylinder, three independent procedures are integrated on the same equipment to be synchronously completed, the assembling efficiency and the assembling precision are greatly improved, the structure is compact, operation is convenient and fast, and cost is low. The positioning is reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to fuel pump assembly technical field, especially relate to a fuel pump guide rod press -fitting device. BACKGROUND

[0002] As the core component of automobile fuel supply system, the assembly precision of fuel pump directly influences the working performance and reliability of fuel pump. Fuel pump is usually composed of pump core, inner liner, upper cover, guide rod, filter screen frame, breather valve and other precise components, and needs to be assembled according to strict process requirements. In the existing fuel pump assembly process, guide rod is pressed into upper cover, filter screen frame is pressed into inner liner, and breather valve is pressed into upper cover, which are usually carried out in multiple independent processes step by step. The traditional assembly mode has the following technical problems: first, multiple process dispersed operation leads to low assembly efficiency, and multiple clamping and positioning are needed, so that cumulative positioning error is large; second, effective guiding and positioning structure is lacked in the process of press fitting, and problems such as press fitting deflection and component damage are prone to occur; third, manual workpiece transfer is needed between processes, which is labor-intensive and difficult to ensure assembly consistency. SUMMARY

[0003] The utility model discloses a fuel pump guide rod press -fitting device with simple structure, reasonable design, high integration degree, and effective improvement of assembly efficiency and assembly precision.

[0004] The utility model discloses a fuel pump guide rod press -fitting device that adopts the technical scheme that the bottom plate is equipped with the upper cover seat that slides on the bottom plate, the upper cover groove for placing the upper cover is equipped on the upper cover seat, the guide rod seat and the inner liner seat are equipped on the side of the bottom plate in the sliding direction of the upper cover seat, the first drive cylinder is equipped on the side of the inner liner seat away from the guide rod seat, the push plate is equipped on the end of the piston rod of the first drive cylinder, a plurality of top rods matched with the guide rod are equipped on the push plate, and the second drive cylinder is equipped on the side of the bottom plate away from the guide rod seat.

[0005] Preferably, the first guide rod groove for supporting the guide rod and the positioning groove for circumferentially positioning the inner liner are formed in the guide rod seat, and the inner liner groove and the second guide rod groove for supporting the inner liner and the guide rod respectively are formed in the inner liner seat.

[0006] Preferably, the locking assembly for fixing the inner liner is equipped on the side of the inner liner seat of the bottom plate.

[0007] Preferably, the end of the top rod is equipped with the top block that can be embedded into the end of the guide rod, and the filter screen groove for supporting the filter screen frame is equipped on the push plate.

[0008] As preferred, the upper cover seat is arranged on the bottom plate through the sliding of the supporting plate, the bottom plate is provided with a vertical block on one side of the supporting plate, the vertical block is provided with a guide rod parallel to the sliding direction of the supporting plate, one side of the supporting plate is provided with a guide block sleeved on the guide rod, and the guide rod is sleeved with a magnet for adsorbing the guide block on the side close to the vertical block.

[0009] As preferred, the bottom plate is provided with a sliding rail and a sliding block sliding on the sliding rail, and the supporting plate is arranged on the sliding block.

[0010] As preferred, the supporting plate is provided with two upper cover seats arranged oppositely, and the two upper cover seats are arranged perpendicularly to the sliding direction thereof.

[0011] The utility model discloses the beneficial effects are:

[0012] 1. One drive cylinder is used to simultaneously realize guide rod press fitting and filter screen frame press fitting, and another drive cylinder is used to synchronously complete breathing valve press fitting, so that three assembly processes are integrated on the same equipment and are synchronously completed, and the assembly efficiency is greatly improved.

[0013] 2. The plurality of positioning groove structures on the guide rod seat and the inner lining seat can simultaneously complete accurate positioning of the guide rod and the inner lining, ensure the accuracy of press fitting position, and avoid press fitting deflection.

[0014] 3. The double guide structure of the sliding rail sliding block and the guide rod guide block guarantees the stability of the movement of the upper cover seat, and is favorable for improving the press fitting quality. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is the use structure diagram of the utility model embodiment;

[0016] Fig. 2 It is the overall structure diagram of the utility model embodiment;

[0017] Fig. 3 It is a structure diagram of the guide rod seat and the inner lining seat of the utility model.

[0018] In the drawing: 1, bottom plate; 2, upper cover seat; 21, upper cover groove; 3, guide rod seat; 31, first guide rod groove; 32, positioning groove; 4, inner lining seat; 41, inner lining groove; 42, second guide rod groove; 5, locking assembly; 6, first drive cylinder; 61, push plate; 62, jacking rod; 63, top block; 64, filter screen groove; 7, sliding rail; 8, sliding block; 9, supporting plate; 91, guide block; 10, vertical block; 11, guide rod; 12, magnet; 13, second drive cylinder. DETAILED DESCRIPTION

[0019] The technical scheme of the utility model will be further concretely described below in combination with the drawings.

[0020] Embodiment: asFigs. 1 to 3 The device for pressing fuel pump guide rod comprises a base plate 1, a sliding rail 7 and a sliding block 8 sliding on the sliding rail 7, a supporting plate 9 on the sliding block 8, two upper cover seats 2 vertically arranged on the supporting plate 9, and an upper cover groove 21 on each upper cover seat 2 for placing an upper cover.

[0021] The base plate 1 is provided with a guide rod seat 3 and an inner liner seat 4 on the side of the sliding direction of the upper cover seat 2, the guide rod seat 3 is provided with a first guide rod groove 31 for supporting the guide rod and a positioning groove 32 for circumferentially positioning the inner liner, and the inner liner seat 4 is provided with an inner liner groove 41 for supporting the inner liner and a second guide rod groove 42 for supporting the inner liner.

[0022] The base plate 1 is provided with a first driving cylinder 6 on the side of the inner liner seat 4 away from the guide rod seat 3, the piston rod end of the first driving cylinder 6 is provided with a push plate 61, the push plate 61 is provided with a plurality of top rods 62 matched with the guide rod, the end of the top rod 62 is provided with a top block 63 which can be embedded into the end of the guide rod, the shape of the top block 63 is matched with the shape of the inner hole of the guide rod to ensure uniform force transmission during pressing.

[0023] The base plate 1 is provided with a vertical block 10 on the side of the supporting plate 9, the vertical block 10 is provided with a guide rod 11 parallel to the sliding direction of the supporting plate 9, the supporting plate 9 is provided with a guide block 91 sleeved on the guide rod 11, and the cooperation of the guide rod 11 and the guide block 91 can improve the stability of the movement of the supporting plate 9.

[0024] The base plate 1 is provided with a second driving cylinder 13 on the side of the supporting plate 9 away from the guide rod seat 3, the position of the second driving cylinder 13 corresponds to the upper cover on the upper cover seat 2, and the second driving cylinder 13 is used for pressing the breathing valve into the upper cover.

[0025] Working principle: 1. First, the spring is sleeved on the guide rod, then the guide rod with the spring is placed on the corresponding position of the inner liner, then the combined inner liner and guide rod are placed on the guide rod seat 3 and the inner liner seat 4 as a whole, and finally the inner liner is fixed by the locking assembly 5 to prevent displacement in subsequent operations.

[0026] 2. Take a top cover that has been press-fitted with a breather valve and place it in the top cover groove 21 of the top cover seat 2 facing the first drive cylinder 6. Then, the operator pushes the pallet 9 along the slide rail 7 and guide rod 11 towards the direction close to the upright block 10 until the guide block 91 is attracted and fixed by the magnet 12. At this time, the top cover and the inner liner on the top cover seat 2 are in a state of mutual pressure, the spring is compressed, and the end of the guide rod just touches the press-fitting hole of the top cover, preparing for press-fitting.

[0027] 3. Take another cover that has not yet been fitted with a breather valve, pre-install the breather valve on the corresponding hole of the cover (but do not press it tight), and then place this cover in the cover groove 21 of the cover seat 2 facing the second drive cylinder 13. At the same time, place the filter screen frame in the filter screen groove 64 of the push plate 61, and ensure that the filter screen frame is aligned with the pump core inside the liner.

[0028] 4. Start the equipment. First, start the second drive cylinder 13 so that the piston rod end extends and abuts against the breather valve pre-installed on the top cover to apply pre-pressure. Then start the first drive cylinder 6. The piston rod of the first drive cylinder 6 extends and pushes the push plate 61 to move closer to the inner liner seat 4. The top block 63 at the end of the top rod 62 on the push plate 61 pushes the end of the guide rod, pushing the guide rod out from the first guide rod groove 31 and the second guide rod groove 42, and overcoming the spring resistance to press it into the corresponding hole in the top cover. At the same time, the filter screen frame on the push plate 61 is pushed by the push plate 61 and precisely pressed into the pump core on the inner side of the inner liner. During the process of the guide rod being pressed into place, the second drive cylinder 13 simultaneously presses the breather valve completely into the top cover, realizing the synchronous completion of the three pressing actions.

[0029] 5. After the pressing is completed, the piston rods of the first drive cylinder 6 and the second drive cylinder 13 retract, driving the push plate 61 and the pressure head of the second drive cylinder 13 back to their original positions. The operator pulls the pallet 9 out of the magnet 12 and moves it along the guide rod 11 to a position that is easy to operate. The top cover assembly that has completed all pressing processes is removed (at this time, the top cover has integrated the guide rod, the breather valve, and the filter frame has been pressed into the liner), and the next workpiece is pre-assembled to start a new round of pressing cycle.

Claims

1. A fuel pump guide rod press fitting device comprising a base plate (1), characterized in that: The upper cover seat (2) is slidably arranged on the bottom plate (1), and the upper cover groove (21) for placing the upper cover is arranged on the upper cover seat (2); the guide rod seat (3) and the inner liner seat (4) are arranged on one side of the upper cover seat (2) in the sliding direction; the first driving cylinder (6) is arranged on the side of the inner liner seat (4) away from the guide rod seat (3); the push plate (61) is arranged on the end of the piston rod of the first driving cylinder (6); the plurality of top rods (62) matched with the guide rods are arranged on the push plate (61); and the second driving cylinder (13) is arranged on the side of the upper cover seat (2) away from the guide rod seat (3).

2. The fuel pump guide rod press fitting device according to claim 1, characterized by: The first guide rod groove (31) for supporting the guide rods and the positioning groove (32) for circumferentially positioning the inner liner are arranged on the guide rod seat (3); and the inner liner groove (41) for supporting the inner liner and the second guide rod groove (42) for supporting the guide rods are arranged on the inner liner seat (4).

3. The fuel pump guide rod press fitting device according to claim 1, characterized by: The locking assembly (5) for fixing the inner liner is arranged on one side of the inner liner seat (4) of the bottom plate (1).

4. The fuel pump guide rod press fitting device according to claim 1, characterized by: The end of the top rod (62) is provided with the top block (63) which can be embedded into the end of the guide rod; and the filter screen groove (64) for supporting the filter screen frame is arranged on the push plate (61).

5. The fuel pump guide rod press fitting device according to claim 1, characterized by: The upper cover seat (2) is slidably arranged on the bottom plate (1) through the supporting plate (9); the vertical block (10) is arranged on one side of the bottom plate (1); the guide rod (11) parallel to the sliding direction of the supporting plate (9) is arranged on the vertical block (10); the guide block (91) is sleeved on the guide rod (11) on one side of the supporting plate (9); and the magnet (12) for attracting the guide block (91) is sleeved on the side of the guide rod (11) close to the vertical block (10).

6. The fuel pump guide rod press fitting device according to claim 5, characterized by: The slide rail (7) and the sliding block (8) slidably arranged on the slide rail (7) are arranged on the bottom plate (1); and the supporting plate (9) is arranged on the sliding block (8).

7. The fuel pump guide rod press fitting device according to claim 5, characterized by: The two upper cover seats (2) are arranged on the supporting plate (9) in opposite directions; and the two upper cover seats (2) are arranged perpendicularly to the sliding direction.

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