Rotary core-pulling structure of automobile oil return adapter pipe

Abstract

The utility model relates to a structure technology field, including mould main body, the transmission shaft is rotationally arranged in mould main body, the arc core that is matched with product reverse buckle is fixed on the transmission shaft, the outer wall of arc core is equipped with wedge surface, the locking block that is matched with wedge surface is vertically lifted above wedge surface, the utility model discloses solve the problem that the traditional technology in because the reverse buckle structure is in the oil return adapter pipe, make the oil return adapter pipe in injection moulding process, restrict the limitation of structure, difficult to separate the core in the reverse buckle structure of oil return adapter pipe, and further reduce the forming efficiency of oil return adapter pipe problem.

Description

Technical Field

[0001] This utility model relates to the field of molding structure technology, specifically to a rotary core-pulling structure for automotive oil return adapter pipes. Background Technology

[0002] In automotive fuel systems, the manufacturing precision and quality of the return fuel transfer tube directly affect fuel delivery efficiency and system stability. The rotary core-pulling structure, a key technology in the production process of the return fuel transfer tube, plays an indispensable role in shaping complex tube shapes and ensuring the internal quality of the tube body.

[0003] A prior art patent, CN106623485B, discloses a solution including a frame. One side of the frame has a corrugating mechanism for creating several corrugated annular protrusions spaced axially on the circumferential surface of a straight pipe. The middle of the frame has a cutting mechanism for flaring off the ends of the straight pipe. The other side of the frame has a bending mechanism for bending the straight pipe processed by the corrugating mechanism. The bending mechanism includes a bending mandrel inserted into the straight pipe to prevent deformation during bending. The mandrel includes a fixed rod, one end of which is sequentially hinged with first, second, and third mandrel beads forming a beaded chain. The lower part of the end face of the first and second mandrel beads away from the fixed rod and the lower part of the end face of the fixed rod are respectively provided with inclined surfaces for adjacent mandrel beads to adhere and form a curved shape during straight pipe bending. This device is not only compact but also convenient for manufacturing turbocharger return oil pipes, and the forming process is simple.

[0004] As existing devices are used, the shortcomings of this technology have gradually become apparent, mainly in the following aspects:

[0005] Because the return oil pipe has an undercut structure, it is difficult to separate the mold core inside the undercut structure during the injection molding process due to structural limitations, which reduces the molding efficiency of the return oil pipe.

[0006] As can be seen from the above, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides a rotary core-pulling structure for automotive oil return connectors. This structure solves the problem that, due to the undercut structure in the oil return connector, it is difficult to separate the mold core within the undercut structure during injection molding, thus reducing the molding efficiency of the oil return connector.

[0008] To achieve the above objectives, the present invention provides the following technical solution.

[0009] The rotary core-pulling structure for automotive oil return pipe includes a mold body. A drive shaft is horizontally rotatable inside the mold body. An arc-shaped mold core that matches the undercut of the product is fixedly connected to the drive shaft. A wedge-shaped surface is provided on the outer wall of the arc-shaped mold core. A locking block that matches the wedge-shaped surface is vertically raised and lowered above the wedge-shaped surface.

[0010] As an optimized solution, a drive wheel is fixedly connected to the transmission shaft, the drive wheel wall is provided with toothed sections, and a rack that meshes with the toothed sections is horizontally slidably provided on the mold body.

[0011] As an optimized solution, a hydraulic cylinder is fixed to the outside of the mold body, and the telescopic end of the hydraulic cylinder is fixedly connected to one end of the rack.

[0012] As an optimized solution, the cylinder body end of the hydraulic cylinder is fixed to the lower template by a connecting rod.

[0013] As an optimized solution, two seats are fixedly connected side by side on the lower template, and the two ends of the transmission shaft are rotatably mounted on the two seats.

[0014] As an optimized solution, both ends of the drive shaft are rotatably supported on the base by bearings.

[0015] As an optimized solution, a slider seat is fixed on one side of the lower template, and the locking block is slidably mounted on the slider seat along the vertical direction.

[0016] As an optimized solution, the slider seat is provided with a groove that matches the locking block.

[0017] As an optimized solution, the upper surface of the locking block is fixed to the upper template.

[0018] As an optimized solution, the lower template is provided with a clearance groove to avoid the rack, and the rack is slidably constrained within the clearance groove.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] Before the oil return adapter is formed, the oil cylinder drives the rack to slide, the rack drives the drive shaft to rotate, and the drive shaft drives the arc-shaped mold core into the mold cavity to participate in the inverted forming of the oil return adapter. During the mold closing process, the upper template drives the locking block to move down and cooperate with the wedge-shaped surface on the outer wall of the arc-shaped mold core to lock and position the arc-shaped mold core.

[0021] After the return oil adapter tube is formed, the mold opening process is carried out. The locking block moves up with the upper template, releasing the locking of the arc-shaped mold core. Then, the hydraulic cylinder extends and retracts, using the rack to drive the transmission shaft to rotate in the opposite direction. At the same time, the arc-shaped mold core follows the transmission shaft to rotate, and the arc-shaped mold core is pulled out from the undercut cavity of the return oil adapter tube, realizing the core pulling action. This is convenient and quick, and improves the forming efficiency of the return oil adapter tube. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the base of this utility model.

[0025] In the diagram: 1-drive shaft; 2-arc mold core; 3-wedge surface; 4-locking block; 5-drive wheel; 6-rack; 7-avoiding groove; 8-lower template; 9-oil cylinder; 10-slider seat; 11-slide groove; 12-oil return adapter pipe; 13-undercut; 14-bearing; 15-base. Detailed Implementation

[0026] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0027] like Figure 1 and Figure 2 As shown, the rotating core-pulling structure of the automotive oil return pipe includes a mold body. A drive shaft 1 is horizontally rotatable inside the mold body. An arc-shaped mold core 2 that matches the product undercut 13 is fixedly connected to the drive shaft 1. A wedge-shaped surface 3 is provided on the outer wall of the arc-shaped mold core 2. A locking block 4 that matches the wedge-shaped surface 3 is vertically raised and lowered above the wedge-shaped surface 3.

[0028] A drive wheel 5 is fixedly connected to the drive shaft 1. The drive wheel 5 has toothed sections on its wheel wall. A rack 6 that meshes with the toothed sections is horizontally slidable on the mold body.

[0029] A hydraulic cylinder 9 is fixed to the outside of the mold body, and the telescopic end of the hydraulic cylinder 9 is fixedly connected to one end of the rack 6.

[0030] The cylinder body end of the hydraulic cylinder 9 is fixed to the lower template 8 via a connecting rod.

[0031] Two seats 15 are fixedly connected side by side on the lower template 8, and the two ends of the drive shaft 1 are rotatably mounted on the two seats 15.

[0032] Both ends of the drive shaft 1 are rotatably supported on the base 15 by bearings 14.

[0033] A slider seat 10 is fixed on one side of the lower template 8, and the locking block 4 is slidably installed on the slider seat 10 along the vertical direction.

[0034] The slider seat 10 is provided with a groove 11 that matches the locking block 4.

[0035] The upper surface of locking block 4 is fixed to the upper template.

[0036] The lower template 8 has a clearance groove 7 for the rack 6, and the rack 6 is slidably constrained within the clearance groove 7.

[0037] The device innovates only the structure of the undercut 13 forming part of the return oil transfer pipe 12. The other structures involved in the mold are the same as the existing mold structure of the return oil transfer pipe. Since they are not innovative in this solution, they will not be described in detail here.

[0038] The working principle of this device is as follows:

[0039] Before the oil return adapter is formed, the oil cylinder 9 drives the rack 6 to slide, the rack 6 drives the transmission shaft 1 to rotate, and the transmission shaft 1 drives the arc-shaped mold core 2 to enter the mold cavity to participate in the forming of the oil return adapter undercut 13. During the mold closing process, the upper template drives the locking block 4 to move down and cooperate with the wedge surface 3 on the outer wall of the arc-shaped mold core 2 to lock and position the arc-shaped mold core 2.

[0040] After the return oil transfer tube is formed, the mold opening operation is carried out. The locking block 4 moves up with the upper template, releasing the locking of the arc-shaped mold core 2. Then, the oil cylinder 9 extends and retracts, using the rack 6 to drive the transmission shaft 1 to rotate in the opposite direction. At the same time, the arc-shaped mold core 2 follows the transmission shaft 1 to rotate. The arc-shaped mold core 2 is pulled out from the cavity of the inverted 13 of the return oil transfer tube, realizing the core pulling action, which is convenient and quick, and improves the forming efficiency of the return oil transfer tube.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A rotary core-pulling structure for automotive oil return adapter pipe, characterized in that: The mold body includes a horizontally rotating drive shaft (1) inside the mold body. An arc-shaped mold core (2) matching the product undercut (13) is fixedly connected to the drive shaft (1). A wedge-shaped surface (3) is provided on the outer wall of the arc-shaped mold core (2). A locking block (4) matching the wedge-shaped surface (3) is vertically raised and lowered above the wedge-shaped surface (3).

2. The rotary core-pulling structure for the automotive oil return connector according to claim 1, characterized in that: A drive wheel (5) is fixedly connected to the drive shaft (1). The drive wheel (5) has a toothed section on its wall. A rack (6) that meshes with the toothed section is horizontally slidably provided on the mold body.

3. The rotary core-pulling structure for the automotive oil return connector according to claim 2, characterized in that: A hydraulic cylinder (9) is fixed to the outside of the mold body, and the telescopic end of the hydraulic cylinder (9) is fixedly connected to one end of the rack (6).

4. The rotary core-pulling structure for the automotive oil return connector according to claim 3, characterized in that: The cylinder body end of the hydraulic cylinder (9) is fixed to the lower template (8) by a connecting rod.

5. The rotary core-pulling structure for the automotive oil return connector according to claim 4, characterized in that: Two seats (15) are fixedly connected side by side on the lower template (8), and the two ends of the transmission shaft (1) are rotatably mounted on the two seats (15).

6. The rotary core-pulling structure for the automotive oil return connector according to claim 5, characterized in that: The two ends of the drive shaft (1) are rotatably supported on the seat (15) by bearings (14).

7. The rotary core-pulling structure for the automotive oil return connector according to claim 4, characterized in that: A slider seat (10) is fixed on one side of the lower template (8), and the locking block (4) is slidably mounted on the slider seat (10) in a vertical direction.

8. The rotary core-pulling structure for the automotive oil return connector according to claim 7, characterized in that: The slider seat (10) is provided with a groove (11) that matches the locking block (4).

9. The rotary core-pulling structure for the automotive oil return connector according to claim 1, characterized in that: The upper surface of the locking block (4) is fixed to the upper template.

10. The rotary core-pulling structure for the automotive oil return adapter according to claim 4, characterized in that: The lower template (8) is provided with a clearance groove (7) to avoid the rack (6), and the rack (6) is slidably constrained in the clearance groove (7).

Images