Press fitting device for electromagnetic switch of starting motor

Abstract

The utility model discloses a press-fitting device of a starting motor electromagnetic switch, which comprises an upper press-fitting tool and a lower positioning tool, the upper press-fitting tool comprises a lifting plate and a fixed pressure head, the outer side of the fixed pressure head is sleeved with a floating pressure ring and a first spring, and the fixed pressure head is provided with a lower limiting structure; the lower positioning tool comprises a bottom plate, a shell positioning seat is arranged on the upper end face of the bottom plate, a floating plate is arranged above the shell positioning seat, the bottom plate is connected with the floating plate through a second spring, a mounting hole is formed in the middle of the floating plate, a coil positioning seat is detachably sleeved with the mounting hole, and a positioning hole is formed in the middle of the coil positioning seat. A vertical guide strip and a plurality of clamping pieces are arranged on the inner wall of the positioning hole; the fixed pressure head, the floating pressure ring, the positioning hole and the shell positioning seat are coaxially aligned; the press-fitting tool is high in press-fitting success rate and accurate in press-fitting angle, positioning points do not need to be punched on a switch shell, material mixing is avoided, and efficiency is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts production equipment, in particular to a press-fit device for a starter motor electromagnetic switch. Background Art

[0002] The electromagnetic switch on the starter motor is a switch device used to control the starter motor, usually installed on the starter of the car. Its main function is to connect the main circuit and control circuit of the starter motor when starting the engine, so that the starter motor can work normally, thereby driving the engine to rotate and complete the starting process.

[0003] The electromagnetic switch is mainly composed of switch contacts, electromagnets and shells. When the ignition switch is in the start position, current passes through the coil of the electromagnetic switch, generating a magnetic field, attracting the iron core to move, and then connecting the main circuit and control circuit of the starter motor. At this time, the starter motor starts to work and drives the engine to rotate.

[0004] During the production of electromagnetic switches, the electromagnet assembly needs to be pressed into the housing at a predetermined angle. Generally, workers visually align the positioning point of the housing punch with the notch of the electromagnet assembly and press it in. However, there are often many types of housings on site according to production needs. The shape of each housing is the same, and the only difference is that the positioning point angle of the housing punch is different. This makes it easy to mix the incoming materials and inconvenience the operation. In addition, during the press-fitting process, the electromagnet assembly is generally pressed directly into the housing manually or automatically. Although this can also achieve press-fitting, the electromagnet assembly may be axially tilted or rotated at a small angle during the press-fitting process, resulting in press-fitting failure. Summary of the invention

[0005] The utility model aims to solve the problems existing in the prior art and provide a press-fitting device for a starter motor electromagnetic switch, which has a high press-fitting success rate, a precise press-fitting angle, no need to punch positioning points on the switch housing, avoids mixing of materials, and has higher efficiency.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A press-fitting device for a starter motor electromagnetic switch comprises an upper press-fitting tool and a lower positioning tool, the upper press-fitting tool comprises a lifting plate and a fixed pressure head connected to the lifting plate, the outer side of the fixed pressure head is sleeved with a floating pressure ring and a first spring, the fixed pressure head is provided with a lower limit structure for limiting the relative downward displacement of the floating pressure ring, one end of the first spring abuts against the floating pressure ring, and the other end abuts against the lifting plate; the lower positioning tool comprises a bottom plate, the upper end surface of the bottom plate is provided with a shell positioning seat, the upper part of the shell positioning seat is provided with a floating plate, the bottom plate and the floating plate are connected by a second spring, the middle part of the floating plate is provided with a mounting hole, the mounting hole is detachably sleeved with a coil positioning seat, the middle part of the coil positioning seat is provided with a positioning hole, the inner wall of the positioning hole is provided with a vertical guide bar and a plurality of clamping members; the fixed pressure head, the floating pressure ring, the positioning hole and the shell positioning seat are coaxially aligned.

[0008] The bottom plate is connected with a plurality of first guide rods and second guide rods. The first guide rods penetrate the lifting plate and slide with the lifting plate. The second guide rods penetrate the floating plate and slide with the floating plate. The second spring is sleeved on the outer side of the second guide rods.

[0009] The coil positioning seat is provided with a plurality of radially distributed first threaded holes, the first threaded holes penetrate the cylindrical wall of the coil positioning seat, the clamping member is a first threaded column, the first threaded column is connected to the first threaded hole by threads, and one end of the first threaded column extends into the positioning hole.

[0010] A dome is provided at one end of the first threaded column close to the positioning hole.

[0011] The coil positioning seat includes a positioning tube and a mounting tube coaxially connected to the positioning tube. The outer diameter of the positioning tube is larger than that of the mounting tube. The mounting tube is sleeved in the mounting hole. The lower end surface of the positioning tube abuts against the floating plate for limiting position. A plurality of the first threaded holes are arranged on the tube wall of the positioning tube.

[0012] The floating plate is provided with a second threaded hole connected to the mounting hole, a second threaded column is connected in the second threaded hole, and an inner end of the second threaded column abuts against an outer wall of the mounting tube.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. By setting the floating press ring and the floating plate together, the floating plate is used to clamp the electromagnet assembly and align it with the switch housing until it contacts, and then the fixed pressure head is used to make the electromagnet assembly come out of the floating plate and clamp it into place with the switch housing. While realizing automatic press-fitting, the press-fitting success rate is high, avoiding the situation of easy tilting and jamming and inadequate press-fitting, and ensuring the accuracy of the press-fitting angle between the electromagnet assembly and the switch housing;

[0015] 2. The coil positioning seat and the floating plate are detachably connected. When the installation angle of the electromagnet assembly needs to be adjusted, only the corresponding coil positioning seat angle needs to be adjusted, so as to more flexibly adjust the press-fit angle of the switch housing and the electromagnet assembly. Compared with the manual visual alignment of the electromagnet assembly and the switch housing, there is no need to punch the positioning point on the switch housing, which is more efficient and avoids mixing of incoming materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an overall structural diagram of a press-fitting device in one embodiment of the present application;

[0017] Figure 2 This is a structural diagram of a fixed pressure head and a floating pressure ring in an embodiment of the present application;

[0018] Figure 3 This is a structural diagram of a coil positioning seat in one embodiment of the present application;

[0019] Figure 4 This is a structural diagram of the lower positioning tool in one embodiment of the present application;

[0020] Figure 5 This is a schematic diagram of the structure of the electromagnetic switch in an embodiment of the present application before being pressed;

[0021] Figure 6 This is a schematic diagram of the structure of the electromagnetic switch in a press-fit state in one embodiment of the present application;

[0022] Figure 7 This is an overall diagram of the electromagnetic switch and the press-fit device in one embodiment of the present application;

[0023] In the figure: 1. lifting plate; 2. fixed pressure head; 3. floating pressure ring; 4. first spring; 5. bottom plate; 6. shell positioning seat; 7. floating plate; 8. second spring; 9. coil positioning seat; 901. positioning cylinder; 902. mounting cylinder; 10. guide bar; 11. clamping piece; 12. first guide rod; 13. second guide rod; 14. second threaded column. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] like Figures 1 to 4As shown, a press-fitting device for a starter motor electromagnetic switch comprises an upper press-fitting tool and a lower positioning tool. The upper press-fitting tool comprises a lifting plate 1 and a fixed pressure head 2 connected to the lifting plate 1. A floating pressure ring 3 and a first spring 4 are sleeved on the outer side of the fixed pressure head 2. The fixed pressure head 2 is provided with a lower limit structure for limiting the relative downward displacement of the floating pressure ring 3. One end of the first spring 4 abuts against the floating pressure ring 3, and the other end abuts against the lifting plate 1; the lower positioning tool comprises a bottom plate 5. A shell positioning seat 6 is provided on the upper end surface of the bottom plate 5. A floating plate 7 is provided above the shell positioning seat 6. The bottom plate 5 and the floating plate 7 are connected through a second spring 8. A mounting hole is provided in the middle of the floating plate 7. A coil positioning seat 9 is detachably sleeved in the mounting hole. A positioning hole is provided in the middle of the coil positioning seat 9. A vertical guide bar 10 and a plurality of clamping members 11 are provided on the inner wall of the positioning hole; the fixed pressure head 2, the floating pressure ring 3, the positioning hole and the shell positioning seat 6 are coaxially aligned.

[0029] The electromagnet assembly to be press-fitted is installed into the positioning hole of the coil positioning seat 9. The clamping piece 11 temporarily fixes the electromagnet assembly through friction so that the notch of the electromagnet assembly is just aligned with the guide bar 10 of the positioning hole. The direction of the electromagnet assembly is positioned, and the switch housing is fixed on the housing positioning seat 6. The upper press-fitting tool is used to press the electromagnet assembly into the switch housing at a predetermined azimuth angle to complete the press-fitting.

[0030] The specific pressing process of the upper press-fitting tool is that the lifting plate 1 drives the fixed pressure head 2 and the floating pressure ring 3 to press down synchronously, and the floating pressure ring 3 presses the floating plate 7 downward after contacting the coil positioning seat 9, until the outer ring of the electromagnet assembly is in interference contact with the inner wall of the switch housing. At this time, the lifting plate 1 is still moving downward, but the electromagnet assembly forms a supporting force on the floating plate 7 to prevent the floating plate 7 from moving further downward, so that the floating pressure ring 3 overcomes the elastic force of the first spring 4 and moves upward relative to the fixed pressure head 2. The fixed pressure head 2 continues to move downward, and the fixed pressure head 2 passes through the positioning hole to press the electromagnet assembly downward, so that the electromagnet assembly overcomes the friction force of the clamping piece 11 and continues to move downward until the outer ring of the electromagnet assembly is completely snapped into place with the inner wall of the switch housing, completing the press-fitting, and the lifting plate 1 drives the fixed pressure head 2 and the floating pressure ring 3 to rise synchronously, and the first spring 4 and the second spring 8 respectively return the floating pressure ring 3 and the floating plate 7.

[0031] Among them, the lower limit structure of the fixed pressure head 2 for limiting the relative downward displacement of the floating pressure ring 3 belongs to the prior art. For example, a retaining ring 1 is set on the outer wall of the fixed pressure head 2, and a retaining ring 2 is set on the inner wall of the floating pressure ring 3. The upper side of the retaining ring 1 abuts against the lower side of the retaining ring 2, thereby realizing the lower limit of the floating pressure ring 3 without preventing the relative upward displacement of the floating pressure ring 3. It is easy for technical personnel in this field to think of and implement it without special limitation.

[0032] By setting a floating pressure ring 3 to cooperate with the floating plate 7, the electromagnet assembly is first clamped by the floating plate 7 to align with the switch housing until they are in contact, and then the electromagnet assembly is released from the floating plate 7 by the fixed pressure head 2, and is clamped into place with the switch housing. While realizing automatic press-fitting, the press-fitting success rate is high, avoiding the situation of easy tilting and jamming, and inadequate press-fitting, and ensuring the accuracy of the press-fitting angle of the electromagnet assembly and the switch housing.

[0033] The coil positioning seat 9 and the floating plate 7 are detachably connected. When the installation angle of the electromagnet assembly needs to be adjusted, it is only necessary to adjust the corresponding angle of the coil positioning seat 9, thereby more flexibly realizing the adjustment of the press-fit angle of the switch housing and the electromagnet assembly. Compared with the method of manually aligning the electromagnet assembly with the switch housing by visual inspection, there is no need to punch positioning points on the switch housing, which is more efficient and avoids mixing of incoming materials.

[0034] In one embodiment, the bottom plate 5 is connected with a plurality of first guide rods 12 and second guide rods 13, the first guide rods 12 penetrate the lifting plate 1 and slide with the lifting plate 1, the second guide rods 13 penetrate the floating plate 7 and slide with the floating plate 7, and the second spring 8 is sleeved on the outer side of the second guide rods 13. The first guide rods 12 are used to guide the vertical lifting of the lifting plate 1, and the second guide rods 13 are used to guide the vertical lifting of the floating plate 7 to avoid deflection.

[0035] In one embodiment, the coil positioning seat 9 is provided with a plurality of radially distributed first threaded holes, the first threaded holes penetrate the cylinder wall of the coil positioning seat 9, the clamping member 11 is a first threaded column, the first threaded column is connected to the first threaded hole by threads, and one end of the first threaded column extends into the positioning hole. By screwing the first threaded column into the first threaded hole, the first threaded column clamps the electromagnet assembly from multiple directions, and the electromagnet assembly is pre-positioned to prevent the electromagnet assembly from falling due to gravity, and at the same time, it is easy to get out of the positioning hole during press-fitting.

[0036] Furthermore, a dome is provided at one end of the first threaded column close to the positioning hole. The dome is used to contact the side wall of the electromagnet assembly, that is, it can play a role in clamping the electromagnet assembly, and at the same time reduce the friction resistance of the electromagnet assembly during the process of the electromagnet assembly being pressed down, thereby avoiding scratching the electromagnet assembly during the press-fitting process.

[0037] In one embodiment, the coil positioning seat 9 includes a positioning tube 901 and a mounting tube 902 coaxially connected to the positioning tube 901. The outer diameter of the positioning tube 901 is larger than that of the mounting tube 902. The mounting tube 902 is sleeved in the mounting hole. The lower end surface of the positioning tube 901 is abutted against the floating plate 7 for limiting position. A plurality of first threaded holes are provided on the wall of the positioning tube 901. This structure facilitates the overall replacement or angle adjustment of the coil positioning seat 9. Since the positioning tube 901 is provided on the upper side of the floating plate 7, the first threaded holes are provided on the wall of the positioning tube 901, thereby facilitating the screwing in and out of the first threaded column.

[0038] In one embodiment, the floating plate 7 is provided with a second threaded hole connected to the mounting hole, and a second threaded column 14 is connected in the second threaded hole, and the inner end of the second threaded column 14 abuts against the outer wall of the mounting cylinder 902. By screwing in the second threaded column 14, the mounting cylinder 902 can be tightened to prevent the mounting cylinder 902 from rotating and deviating during the press-fitting process, thereby ensuring the accuracy of the press-fitting angle.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A press-fit device for a starter motor electromagnetic switch, characterized in that: The utility model comprises an upper pressing tool and a lower positioning tool, wherein the upper pressing tool comprises a lifting plate (1) and a fixed pressing head (2) connected to the lifting plate (1), a floating pressing ring (3) and a first spring (4) are sleeved on the outer side of the fixed pressing head (2), and the fixed pressing head (2) is provided with a lower limit structure for limiting the relative downward displacement of the floating pressing ring (3), and one end of the first spring (4) is in contact with the floating pressing ring (3), and the other end is in contact with the lifting plate (1); The lower positioning tool comprises a bottom plate (5), the upper end surface of the bottom plate (5) is provided with a shell positioning seat (6), a floating plate (7) is provided above the shell positioning seat (6), the bottom plate (5) and the floating plate (7) are connected via a second spring (8), a mounting hole is provided in the middle of the floating plate (7), a coil positioning seat (9) is detachably sleeved in the mounting hole, a positioning hole is provided in the middle of the coil positioning seat (9), a vertical guide bar (10) and a plurality of clamping members (11) are provided on the inner wall of the positioning hole, and the clamping members (11) fix the press-fitted product by friction force; The fixed pressure head (2), the floating pressure ring (3), the positioning hole and the housing positioning seat (6) are coaxially aligned.

2. A press-fit device for a starter motor electromagnetic switch according to claim 1, characterized in that: The bottom plate (5) is connected to a plurality of first guide rods (12) and second guide rods (13); the first guide rods (12) penetrate the lifting plate (1) and are slidably matched with the lifting plate (1); the second guide rods (13) penetrate the floating plate (7) and are slidably matched with the floating plate (7); the second spring (8) is sleeved on the outer side of the second guide rods (13).

3. A press-fit device for a starter motor electromagnetic switch according to claim 1, characterized in that: The coil positioning seat (9) is provided with a plurality of radially distributed first threaded holes, the first threaded holes penetrate the cylindrical wall of the coil positioning seat (9), the clamping member (11) is a first threaded column, the first threaded column is connected to the first threaded hole by threads, and one end of the first threaded column extends into the positioning hole.

4. A press-fit device for a starter motor electromagnetic switch according to claim 3, characterized in that: A dome is provided at one end of the first threaded column close to the positioning hole.

5. The press-fit device for the electromagnetic switch of the starter motor according to claim 3, characterized in that: The coil positioning seat (9) comprises a positioning tube (901) and a mounting tube (902) coaxially connected to the positioning tube (901); the outer diameter of the positioning tube (901) is larger than that of the mounting tube (902); the mounting tube (902) is sleeved in the mounting hole; the lower end surface of the positioning tube (901) abuts against the floating plate (7) for limiting position; and a plurality of the first threaded holes are provided on the tube wall of the positioning tube (901).

6. A press-fit device for a starter motor electromagnetic switch according to claim 5, characterized in that: The floating plate (7) is provided with a second threaded hole connected to the mounting hole, a second threaded column (14) is connected in the second threaded hole, and the inner end of the second threaded column (14) abuts against the outer wall of the mounting tube (902).

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