An auxiliary tool for dispensing an automobile fuel pump rotor

Abstract

The utility model relates to an auxiliary tool for dispensing of automobile fuel pump rotor, including ball spline, one end head cooperation installation of ball spline has first clamping block, and the other end head cooperation installation has second clamping block, the outer circumferential surface cooperation installation of ball spline has sleeve, the outer circumferential surface of sleeve is equipped with bearing seat through bearing assembly cooperation, is equipped with a plurality of positioning holes on the radial end face of bearing seat, a plurality of positioning pins are installed on the radial end face of second clamping block cooperation, and the radial end face of second clamping block is installed on positioning fixture cooperation, and positioning fixture is connected with the corresponding end head of ball spline, the outer circumferential surface cooperation installation of ball spline has fender ring, and the outer circumferential surface of ball spline is equipped with spring, and spring cooperation is installed between fender ring and first clamping block, and a plurality of connecting holes are set up on the radial end face of first clamping block. Can realize the starting point and end point of dispensing path difficultly accurate butt joint, avoid forming glue accumulation or broken glue defect, and high use flexibility.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary fixtures for assembling automotive fuel pump rotors, and in particular to an auxiliary tooling for dispensing adhesive onto an automotive fuel pump rotor. Background Technology

[0002] The automotive electronic fuel pump is a core component of the fuel supply system of an electronic fuel injection engine. Its main responsibility is to draw fuel from the fuel tank, pressurize it, and deliver it to the fuel lines to ensure normal engine operation. In an automotive electronic fuel pump, the rotor is the core driving component, and its assembly precision directly affects fuel supply efficiency and system reliability.

[0003] In existing technologies, to meet the dispensing requirements around the rotor end face, a turntable is typically used. Multiple positioning fixtures are set along the circumference of the turntable, and the rotor is placed one by one on these auxiliary fixtures. The turntable then drives the rotor to rotate, facilitating dispensing onto the rotor end face. However, this dispensing method relies solely on the machine's rotation and lacks self-rotation positioning capability. This makes it difficult to accurately align the start and end points of the dispensing path, easily leading to glue accumulation or dispensing defects. Furthermore, fixed fixtures cannot adaptively adjust to differences in rotor height, requiring frequent fixture changes or manual adjustments when processing products of different specifications, severely restricting the flexibility and processing efficiency of the production line. Utility Model Content

[0004] Therefore, it is necessary to provide an auxiliary tooling for dispensing automotive electronic fuel pump rotors, which addresses the problems of existing auxiliary tooling for dispensing automotive electronic fuel pump rotors, such as the lack of self-rotation positioning capability, which easily leads to glue accumulation or glue breakage defects, and the difficulty in adaptive adjustment for different types of rotors.

[0005] The technical solution adopted in this utility model is as follows: An auxiliary tooling for dispensing glue to an automotive fuel pump rotor includes a ball spline. Along the axial direction, a first clamping block is fitted at one end of the ball spline, and a second clamping block is fitted at the other end of the ball spline. A sleeve is fitted onto the outer circumferential surface of the ball spline. A bearing housing is fitted onto the outer circumferential surface of the sleeve via a bearing assembly. Several positioning holes are provided on the radial end face of the bearing housing. Several positioning pins are fitted onto the radial end face of the second clamping block facing the bearing housing. The positioning pins correspond one-to-one with the positioning holes. A positioning fixture is fitted onto the radial end face of the second clamping block away from the bearing housing. The positioning fixture is connected to the corresponding end of the ball spline and supports the rotor through the positioning fixture. A retaining ring is fitted on the outer circumferential surface of the ball spline, and a spring is sleeved on the outer circumferential surface of the ball spline. Along the axial direction, the spring is fitted between the retaining ring and the first clamping block. Several connecting holes are opened on the radial end face of the first clamping block, and the first clamping block is connected to the output end of the external drive component through the connecting holes. The first clamping block is driven to move linearly towards the retaining ring along the axial direction by an external drive component. The first clamping block drives the ball spline to move linearly relative to the bearing seat along the axial direction. The ball spline drives the second clamping block to move linearly away from the bearing seat along the axial direction, so that the positioning pin is disengaged from the corresponding positioning hole. The first clamping block is driven to rotate by the external drive component. The first clamping block drives the ball spline to rotate relative to the bearing seat, thereby driving the rotor to rotate through the positioning fixture. When the ball spline moves axially linearly relative to the bearing housing, it drives the positioning fixture to move axially linearly, thereby adjusting the working position of the positioning fixture.

[0006] As a further improvement to the above technical solution: The first clamping block, ball spline, bearing housing, second clamping block, and positioning fixture are all arranged coaxially.

[0007] The first clamping block has a first central hole in the middle, and a first protruding edge is provided along the circumference inside the first central hole. The first clamping block is installed in conjunction with the ball spline through the first central hole, and the first protruding edge restricts the axial displacement of the ball spline. The second clamping block has a second central hole in the middle, and a second protrusion is provided along the circumference inside the second central hole. The second clamping block is installed in conjunction with the ball spline through the second central hole, and the second protrusion restricts the axial displacement of the ball spline.

[0008] A first positioning groove is formed on the inner wall of the first central hole; A second positioning groove is formed on the inner wall of the second central hole.

[0009] The positioning fixture includes a connecting seat mounted on the radial end face of the second clamping block. A countersunk hole is formed on the radial end face of the connecting seat, and a fixture seat is fitted inside the countersunk hole. A bearing hole for cooperating with the rotor shaft is formed in the middle of the fixture seat. Several positioning pins are provided at one end of the fixture seat to position the rotor. The other end of the fixture seat passes through the countersunk hole and is connected to the ball spline.

[0010] A guide hole is provided inside the countersunk hole of the connector.

[0011] The fixture base is fitted with guide posts corresponding to the guide holes.

[0012] A first pin sleeve is fitted inside a single connecting hole.

[0013] A second pin sleeve is fitted inside a single positioning hole.

[0014] The retaining ring has a mounting groove along its circumference on its radial end face facing the first clamping block, and the retaining ring is installed in conjunction with the spring through the mounting groove.

[0015] The beneficial effects of this utility model are as follows: This utility model has a compact and reasonable structure and is easy to operate. By setting a first clamping block, a second clamping block, and a ball spline, it can drive the rotor to rotate relative to the bearing seat, thereby achieving precise alignment between the start and end points of the dispensing path, avoiding glue accumulation or glue breakage defects. At the same time, it can drive the rotor to move axially linearly relative to the bearing seat, so that the auxiliary tooling can be adaptively adjusted according to the rotor height difference, improving the flexibility of the auxiliary tooling and promoting the development of the automotive electronic fuel pump rotor dispensing process towards high precision and high flexibility.

[0016] This utility model also has the following advantages: (1) In this utility model, the first clamping block, ball spline, bearing seat, second clamping block and positioning fixture are all arranged coaxially, which can ensure that the movement of each component is precise and synchronous, reduce deviation, and improve the stability and positioning accuracy of rotor rotation and axial adjustment.

[0017] (2) By setting the first convex edge and the second convex edge in this utility model, the axial displacement of the ball spline can be restricted, preventing it from moving around, and ensuring that the clamping block and the ball spline are stably matched and the transmission is accurate.

[0018] (3) By setting the first positioning groove and the second positioning groove in this utility model, relative rotational motion between the corresponding clamping block and the ball spline can be avoided, thereby improving the motion consistency between the components and ensuring the precise rotation of the rotor.

[0019] (4) By setting a connecting seat and a fixture seat in this utility model, the positioning accuracy of the auxiliary tooling on the rotor can be ensured and the motion stability of the rotor can be improved.

[0020] (5) By setting the first pin sleeve and the second pin sleeve in this utility model, the wear between the hole and the corresponding pin can be reduced, the service life of the auxiliary tooling can be extended, and the positioning accuracy and assembly stability can be improved. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 for Figure 1 Top view.

[0023] Figure 3 for Figure 2 A sectional view of section AA in the middle.

[0024] Figure 4 This is a schematic diagram of the installation structure of the first clamping block and the first pin sleeve in this utility model.

[0025] Figure 5 This is a schematic diagram of the installation structure of the second clamping block and the positioning pin in this utility model.

[0026] Figure 6 This is a schematic diagram of the ball spline structure in this utility model.

[0027] Figure 7 This is a schematic diagram of the connecting seat in this utility model.

[0028] Figure 8 This is a schematic diagram of the fixture base in this utility model.

[0029] Figure 9 This is a schematic diagram of the present invention in its working state.

[0030] Wherein: 1. First clamping block; 101. First protruding edge; 102. First positioning groove; 2. Second clamping block; 201. Second protruding edge; 202. Second positioning groove; 3. First pin sleeve; 4. Second pin sleeve; 5. Spring; 6. Retaining ring; 601. Mounting groove; 7. Positioning pin; 8. Ball spline; 9. Sleeve; 901. Limiting protruding edge; 10. Slewing bearing; 11. Bearing seat; 12. Connecting seat; 1201. First positioning arrow; 1202. Guide hole; 13. Fixture seat; 1301. Second positioning arrow; 1302. Guide post; 1303. Bearing hole; 1304. Positioning post; 14. Elastic retaining ring; 15. Rotor. Detailed Implementation

[0031] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0032] The structure and function of this utility model are as follows: like Figures 1-9As shown, an auxiliary tooling for dispensing fuel pump rotor in an automotive fuel pump includes a ball spline 8. Along the axial direction, a first clamping block 1 is fitted to one end of the ball spline 8, and a second clamping block 2 is fitted to the other end. A sleeve 9 is fitted to the outer circumferential surface of the ball spline 8. A bearing housing 11 is fitted to the outer circumferential surface of the sleeve 9 via a bearing assembly. Several positioning holes are formed on the radial end face of the bearing housing 11. Several positioning pins 7 are fitted to the radial end face of the second clamping block 2 facing the bearing housing 11, with each positioning pin 7 corresponding to a positioning hole. A positioning fixture is fitted to the radial end face of the second clamping block 2 away from the bearing housing 11, and the positioning fixture connects to the corresponding end of the ball spline 8, supporting the rotor 15. A retaining ring 6 is fitted to the outer circumferential surface of the ball spline 8, and a spring 5 is sleeved on the outer circumferential surface of the ball spline 8. Along the axial direction, spring 5 is fitted between retaining ring 6 and first clamping block 1. Several connecting holes are opened on the radial end face of first clamping block 1. First clamping block 1 is connected to the output end of external drive assembly through connecting holes. The external drive assembly drives first clamping block 1 to make linear motion along the axial direction close to retaining ring 6. First clamping block 1 drives ball spline 8 to make linear motion relative to bearing seat 11. Ball spline 8 drives second clamping block 2 to make linear motion away from bearing seat 11 along the axial direction, so that positioning pin 7 is disengaged from the corresponding positioning hole. The external drive assembly drives first clamping block 1 to rotate. First clamping block 1 drives ball spline 8 to rotate relative to bearing seat 11, thereby driving rotor 15 to rotate through positioning fixture. When ball spline 8 makes linear motion relative to bearing seat 11, it drives positioning fixture to make linear motion, thereby adjusting the working position of positioning fixture. By setting the first clamping block 1, the second clamping block 2, and the ball spline 8, the rotor 15 can be driven to rotate relative to the bearing housing 11 under the action of the external drive component, thereby realizing the self-rotation function of the rotor 15; at the same time, it can drive the rotor 15 to make axial linear motion relative to the bearing housing 11, and can adjust the working position of the positioning fixture relative to the bearing housing 11, so that the auxiliary tooling can be adaptively adjusted according to the height difference of different types of rotors 15, improving the flexibility of the auxiliary tooling.

[0033] The first clamping block 1, the ball spline 8, the bearing housing 11, the second clamping block 2, and the positioning fixture are all arranged coaxially, which can ensure that the movement of each component is precise and synchronized, reduce deviations, and improve the stability and positioning accuracy of the rotor 15's rotation and axial adjustment.

[0034] like Figure 6As shown, in this utility model, the structure of the ball spline 8 includes a spline shaft and a nut installed on the outer circumferential surface of the spline shaft. An array of steel ball assemblies is installed between the inner wall of the nut and the outer circumferential surface of the spline shaft. The steel ball assemblies are limited by retainers. Several axially arranged grooves are opened on the outer circumferential surface of the spline shaft, corresponding to the steel ball assemblies. The steel ball assembly includes several steel balls, which slide in the corresponding grooves, thereby enabling the spline shaft to slide axially relative to the nut.

[0035] The first clamping block 1 has a first central hole in its middle, and a first protruding edge 101 is provided along the circumference of the first central hole. The first clamping block 1 is installed in conjunction with the ball spline 8 through the first central hole, and the first protruding edge 101 restricts the axial displacement of the ball spline 8. The second clamping block 2 has a second central hole in its middle, and a second protruding edge 201 is provided along the circumference of the second central hole. The second clamping block 2 is installed in conjunction with the ball spline 8 through the second central hole, and the second protruding edge 201 restricts the axial displacement of the ball spline 8. By setting the first protruding edge 101 and the second protruding edge 201, they can respectively mate with the two end circular surfaces of the spline shaft, thereby restricting the axial displacement of the ball spline 8, preventing it from moving around, and ensuring stable engagement between the clamping block and the ball spline 8 and precise transmission.

[0036] A first positioning groove 102 is formed on the inner wall of the first central hole; a second positioning groove 202 is formed on the inner wall of the second central hole. In this utility model, the first positioning groove 102 and the second positioning groove 202 correspond to one of the grooves on the spline shaft. By placing limiting blocks between the first positioning groove 102 and the corresponding groove, and between the second positioning groove 202 and the corresponding groove, relative rotational motion between the first clamping block 1 and the ball spline 8, and between the second clamping block 2 and the ball spline 8 can be avoided, thereby improving the motion consistency between components and ensuring the precise rotation of the rotor 15.

[0037] The positioning fixture includes a connecting seat 12 mounted on the radial end face of the second clamping block 2. A countersunk hole is formed on the radial end face of the connecting seat 12, and a fixture seat 13 is fitted inside the countersunk hole. A bearing hole 1303 is formed in the middle of the fixture seat 13 for engaging with the shaft of the rotor 15. Several positioning pins 1304 are provided at one end of the fixture seat 13 to position the rotor 15. The other end of the fixture seat 13 passes through the countersunk hole and connects to the ball spline 8. The connecting seat 12 connects the fixture seat 13 to the second clamping block 2. A countersunk groove is formed on one radial end face of the connecting seat 12, corresponding to a boss on the radial end face of the second clamping block 2. By setting the countersunk groove and the boss, radial displacement between the connecting seat 12 and the second clamping block 2 can be avoided, ensuring the positioning accuracy and operational stability of the auxiliary tooling.

[0038] A guide hole 1202 is provided in the countersunk hole of the connecting seat 12, and a guide post 1302 corresponding to the guide hole 1202 is installed on the fixture seat 13. By setting the guide hole 1202 and the guide post 1302, relative rotation between the connecting seat 12 and the fixture seat 13 can be avoided, thereby further improving the positioning accuracy and operational stability of the auxiliary tooling.

[0039] In this utility model, a first positioning arrow 1201 is provided on the radial end face of the connecting seat 12, and a second positioning arrow 1301 is provided on the radial end face of the fixture seat 13. By aligning the second positioning arrow 1301 with the first positioning arrow 1201, the fixture seat 13 can be installed in place, which can ensure the precise positioning of the fixture seat 13, avoid installation deviation, and improve assembly efficiency and the positioning accuracy of the rotor 15.

[0040] A first pin sleeve 3 is fitted into a single connecting hole. The first pin sleeve 3 engages with the output shaft of an external drive assembly. Specifically, the external drive assembly includes a rotary drive (which can be a servo motor), the output end of which is connected to a mounting plate. Several linear drive components (which can be servo electric cylinders) are fixed on the mounting plate. The output shaft of a single linear drive component is inserted into the corresponding first pin sleeve 3, and all linear drive components extend simultaneously, thereby driving the first clamping block 1 to perform axial linear motion. When the movement of the first clamping block 1 causes the positioning pin 7 to completely disengage, the servo motor drives the mounting plate to rotate, thereby driving the first clamping block 1 to rotate via the linear drive components, thus enabling the auxiliary tooling to achieve the rotational motion of the rotor 15.

[0041] A second pin sleeve 4 is fitted inside a single positioning hole. By setting the second pin sleeve 4, wear between the positioning hole and the positioning pin 7 can be reduced, service life can be extended, and positioning accuracy and assembly stability can be improved.

[0042] A mounting groove 601 is formed along the circumference on the radial end face of the retaining ring 6 facing the first clamping block 1. The retaining ring 6 is installed with the spring 5 through the mounting groove 601. One end of the spring 5 is welded to the mounting groove 601, and the other end is welded to the first clamping block 1. The mounting groove 601 accurately positions the spring 5, prevents it from shifting, and facilitates welding and fixing, ensuring that the connection between the spring 5 and the retaining ring 6 is firm and reliable.

[0043] In this utility model, the bearing assembly includes at least two slewing bearings 10 arranged axially along the ball spline 8. Each slewing bearing 10 can be a deep groove ball bearing. The outer surface of the sleeve 9 is provided with a limiting flange 901, which can limit the slewing bearing 10. In addition, several elastic retaining rings 14 are also installed between the bearing housing 11 and the sleeve 9 to improve the installation stability of the slewing bearing 10.

[0044] The working process of this utility model is as follows: The auxiliary tooling is arranged upright, and the rotor 15 is placed on the fixture seat 13; The linear drive component of the external drive assembly extends simultaneously, thereby pushing the first clamping block 1 to rise in the vertical direction; The first clamping block 1 drives the spline shaft of the ball spline 8 to move in a straight line in the vertical direction relative to the bearing seat 11. The spline shaft drives the second clamping block 2 to rise in the vertical direction and gradually move away from the bearing seat 11, so that the positioning pin 7 gradually comes out from the corresponding positioning hole. The second clamping block 2 drives the connecting seat 12 and the fixture seat 13 to rise vertically, thereby driving the rotor 15 to rise vertically, and thus adjusting the distance between the rotor 15 and the output end of the dispensing machine, so that the auxiliary tooling can be adaptively adjusted according to the height difference of different types of rotors 15 without manual adjustment, thus improving the flexibility of the auxiliary tooling. After the positioning pin 7 is completely dislodged from the corresponding positioning hole, when circumferential dispensing is required on the end face of the rotor 15, the rotary drive component of the external drive assembly drives the first clamping block 1 to rotate through the linear drive component. Under the action of the bearing assembly, the first clamping block 1 drives the ball spline 8 to rotate relative to the bearing seat 11. The ball spline 8 drives the positioning fixture to rotate, thereby driving the rotor 15 to rotate. This achieves precise alignment between the starting and ending points of the circumferential dispensing path, avoiding glue accumulation or glue breakage defects.

[0045] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. An auxiliary tooling for dispensing adhesive onto an automotive fuel pump rotor, characterized in that: Including a ball spline (8), along the axial direction, a first clamping block (1) is fitted at one end of the ball spline (8), and a second clamping block (2) is fitted at the other end of the ball spline (8). A sleeve (9) is fitted on the outer circumferential surface of the ball spline (8). A bearing seat (11) is fitted on the outer circumferential surface of the sleeve (9) through a bearing assembly. Several positioning holes are opened on the radial end face of the bearing seat (11). Several positioning pins (7) are fitted on the radial end face of the second clamping block (2) facing the bearing seat (11). The positioning pins (7) correspond one-to-one with the positioning holes. A positioning fixture is fitted on the radial end face of the second clamping block (2) away from the bearing seat (11). The positioning fixture is connected to the corresponding end of the ball spline (8) and the rotor (15) is supported by the positioning fixture. A retaining ring (6) is fitted on the outer circumferential surface of the ball spline (8), and a spring (5) is sleeved on the outer circumferential surface of the ball spline (8). Along the axial direction, the spring (5) is fitted between the retaining ring (6) and the first clamping block (1). Several connecting holes are opened on the radial end face of the first clamping block (1), and the first clamping block (1) is connected to the output end of the external drive component through the connecting holes. The first clamp (1) is driven by an external drive assembly to move linearly along the axial direction toward the retaining ring (6). The first clamp (1) drives the ball spline (8) to move linearly along the axial direction relative to the bearing seat (11). The ball spline (8) drives the second clamp (2) to move linearly along the axial direction away from the bearing seat (11), so that the positioning pin (7) is dislodged from the corresponding positioning hole. The first clamp (1) is driven to rotate by the external drive assembly. The first clamp (1) drives the ball spline (8) to rotate relative to the bearing seat (11), thereby driving the rotor (15) to rotate by the positioning fixture. When the ball spline (8) moves axially relative to the bearing housing (11), it drives the positioning fixture to move axially, thereby adjusting the working position of the positioning fixture.

2. The auxiliary tooling for dispensing adhesive on an automotive fuel pump rotor as described in claim 1, characterized in that: The first clamping block (1), the ball spline (8), the bearing seat (11), the second clamping block (2), and the positioning fixture are all arranged coaxially.

3. The auxiliary tooling for dispensing adhesive on an automotive fuel pump rotor as described in claim 1, characterized in that: The first clamping block (1) has a first central hole in the middle, and a first protruding edge (101) is provided along the circumference inside the first central hole. The first clamping block (1) is installed in conjunction with the ball spline (8) through the first central hole, and the first protruding edge (101) restricts the axial displacement of the ball spline (8). The second clamping block (2) has a second central hole in the middle, and a second protrusion (201) is provided along the circumference inside the second central hole. The second clamping block (2) is installed in conjunction with the ball spline (8) through the second central hole, and the second protrusion (201) restricts the axial displacement of the ball spline (8).

4. The auxiliary tooling for dispensing adhesive on an automotive fuel pump rotor as described in claim 3, characterized in that: A first positioning groove (102) is formed on the inner wall of the first central hole. A second positioning groove (202) is formed on the inner wall of the second central hole.

5. The auxiliary tooling for dispensing adhesive on an automotive fuel pump rotor as described in claim 1, characterized in that: The positioning fixture includes a connecting seat (12) installed on the radial end face of the second clamping block (2). A countersunk hole is opened on the radial end face of the connecting seat (12). A fixture seat (13) is installed in the countersunk hole. A bearing hole (1303) for cooperating with the rotating shaft of the rotor (15) is opened in the middle of the fixture seat (13). Several positioning pins (1304) are provided at one end of the fixture seat (13). The rotor (15) is positioned by the positioning pins (1304). The other end of the fixture seat (13) passes through the countersunk hole and is connected to the ball spline (8).

6. The auxiliary tooling for dispensing adhesive on an automotive fuel pump rotor as described in claim 5, characterized in that: The connector (12) has a guide hole (1202) inside the countersunk hole.

7. The auxiliary tooling for dispensing adhesive on an automotive fuel pump rotor as described in claim 6, characterized in that: The fixture base (13) is fitted with a guide post (1302) corresponding to the guide hole (1202).

8. The auxiliary tooling for dispensing adhesive on an automotive fuel pump rotor as described in claim 1, characterized in that: A first pin sleeve (3) is fitted inside a single connection hole.

9. The auxiliary tooling for dispensing adhesive on an automotive fuel pump rotor as described in claim 1, characterized in that: A second pin sleeve (4) is fitted inside a single positioning hole.

10. The auxiliary tooling for dispensing adhesive on an automotive fuel pump rotor as described in claim 1, characterized in that: The retaining ring (6) has a mounting groove (601) on its radial end face facing the first clamping block (1) along the circumference. The retaining ring (6) is installed in conjunction with the spring (5) through the mounting groove (601).

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