Positioning and clamping mechanism and press-fitting device for assembling electromagnetic valve

Abstract

The positioning and clamping mechanism for assembling the electromagnetic valve comprises a cylinder body, a fixed plug and a movable plug are arranged in the cylinder body, and a first through hole is formed in the middle of the fixed plug; the upper part of the movable plug is in sliding fit with the inner wall of the cylinder body; the lower part of the movable plug is in sliding fit with the first through hole; a second through hole is formed in the movable plug, a positioning cylinder is sleeved with the second through hole, the upper end of the positioning cylinder is fixedly connected, and an inner conical surface is arranged on the inner wall of the upper end of the positioning cylinder; the inner side of the positioning cylinder is movably sleeved with a clamping cylinder, the clamping cylinder comprises a cylinder body and a plurality of valve clamping jaws, outer conical surfaces are arranged on the outer walls of the upper ends of the valve clamping jaws, and a profiling hole is defined by the middles of the valve clamping jaws; the lower end of the clamping cylinder extends out of the positioning cylinder and is fixedly connected with the movable plug; according to the utility model, the valve body is positioned while being clamped, and the valve body and the clamping cylinder are ensured to be coaxial, so that the valve body is ensured not to incline during press fitting, and the coaxiality of a product after press fitting is improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts manufacturing technology, specifically to a positioning and clamping mechanism and pressing device for assembling a solenoid valve. Background Technology

[0002] The solenoid valve of an automotive ABS system consists of a valve body, a moving iron, a spring, a fixed iron, and a magnetic shielding tube. The moving iron and the fixed iron are located inside the valve body and the magnetic shielding tube, and are separated by a spring. The lower end of the moving iron blocks the valve port at the lower end of the valve body. The valve body and the magnetic shielding tube are press-fitted together with an interference fit to form the solenoid valve housing.

[0003] During the assembly of the solenoid valve, the valve body and moving iron are placed in the lower pressure fixture as the lower component. After the magnetic shielding tube and the fixed iron are riveted together, they become a whole piece and are attracted in the upper pressure head. Through the cylinder or electric cylinder, the upper pressure head is driven to press the magnetic shielding tube and the valve body in the lower pressure fixture together.

[0004] In existing technology, since the lower press-fit fixture has a contour hole machined according to the valve body's shape, a certain gap is generally left between the contour hole and the valve body's outer diameter to facilitate the removal and placement of the valve body. Because the press-fitting of the magnetic shielding tube and the valve body is an interference fit, after the valve body and the magnetic shielding tube begin press-fitting contact, the gap between the lower press-fit fixture and the workpiece causes the valve body's axis to not coincide with the magnetic shielding tube's axis (there may be an angle). When the valve body is clamped and the solenoid valve is rotated around the valve body's axis, the radial runout of the magnetic shielding tube end is 0.6-1.2mm, thus affecting the product quality of the solenoid valve. Summary of the Invention

[0005] The purpose of this utility model is to address the problems existing in the prior art by providing a positioning and clamping mechanism for assembling a solenoid valve. This mechanism clamps and positions the valve body, ensuring that the valve body and the clamping cylinder are coaxial, thereby preventing the valve body from tilting during press-fitting and improving the coaxiality of the product after press-fitting.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A positioning and clamping mechanism for assembling a solenoid valve includes a cylinder body. A fixed plug is located inside the cylinder body. A movable plug is located between the top plate of the cylinder body and the fixed plug. The fixed plug has a vertically penetrating first through hole in its center. The movable plug has a variable diameter structure, allowing its upper part to slide against the inner wall of the cylinder body, and its lower part to pass through and slide against the first through hole. The movable plug has a vertically penetrating second through hole, within which a positioning cylinder is fitted. The upper end of the positioning cylinder passes through the top plate of the cylinder body and is fixedly connected to the cylinder body. The upper inner wall of the positioning cylinder has an inner conical surface. A clamping cylinder is movably fitted inside the positioning cylinder. The clamping cylinder includes a cylinder body and a plurality of valve grippers spaced circumferentially at the upper end of the cylinder body. The upper outer walls of the valve grippers have outer conical surfaces that mate with the inner conical surfaces. The middle portions of the valve grippers enclose a contoured hole. The lower end of the clamping cylinder extends out of the positioning cylinder and is fixedly connected to the movable plug.

[0008] The side wall of the cylinder is provided with a first vent hole and a second vent hole. The first vent hole is connected to a first air pipe connector, and the second vent hole is connected to a second air pipe connector. The first vent hole is located between the top plate of the cylinder and the movable plug, and the second vent hole is located between the movable plug and the fixed plug.

[0009] A first sealing ring is provided between the upper outer wall of the movable plug and the inner wall of the cylinder; a second sealing ring is provided between the inner wall of the first through hole and the outer wall of the positioning cylinder; a third sealing ring is provided between the inner wall of the fixed plug and the lower outer wall of the movable plug; and a fourth sealing ring is provided between the outer wall of the fixed plug and the inner wall of the cylinder.

[0010] The lower end of the movable plug is fixedly connected to a plug seat, the plug seat is provided with a vertically penetrating third through hole, the lower end of the clamping cylinder is inserted into the third through hole, and the plug seat is provided with a horizontally arranged first threaded hole communicating with the third through hole. The plug seat and the clamping cylinder are fixed in the third through hole by screwing in a fastening bolt.

[0011] This application also includes a fixed bracket, which is fixed to the bottom of the cylinder body by bolts. The fixed bracket is connected to a detection seat, which has a vertical through first mounting hole. A displacement sensor is installed in the first mounting hole. The displacement sensor is fixed to the detection seat by bolts, and the probe of the displacement sensor is aligned with the bottom of the plug seat.

[0012] The fixed bracket includes an upper mounting plate, a lower mounting plate, and two side support plates. The upper mounting plate and the lower mounting plate are arranged parallel to each other, and the two side support plates are vertically connected between the upper mounting plate and the lower mounting plate. The upper mounting plate has a vertically penetrating second mounting hole, and the detection seat is fitted into the second mounting hole. The detection seat is fixed to the upper mounting plate by bolts.

[0013] The inner wall of the cylinder is provided with a limiting ring platform to restrict the upward displacement of the fixed plug. The side wall of the cylinder is provided with a second threaded hole, and the second threaded hole is connected to a limiting bolt. The limiting bolt is screwed into the inner side of the cylinder and restricts the downward displacement of the fixed plug.

[0014] A solenoid valve assembly device includes the aforementioned positioning and clamping mechanism, and further includes an upper pressure head and a driving device for driving the upper pressure head to rise and fall, wherein the upper pressure head is located above the positioning and clamping mechanism.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. By driving the movable piston to move up and down, the clamping cylinder clamps and releases the valve body, which facilitates automated operation; while clamping the valve body, it also positions the valve body to ensure that the valve body and the clamping cylinder are coaxial, thereby ensuring that the valve body will not tilt during press-fitting, thus improving the coaxiality of the product after press-fitting.

[0017] 2. By introducing air into the second vent and simultaneously venting air from the first vent, the movable plug can be driven to move upward. The movable plug is driven pneumatically, which can be controlled by an electronically controlled air valve, making it easy to automate the operation.

[0018] 3. By setting a fixed bracket, it is used to fix the cylinder body on the one hand and to install the detection seat on the other. The displacement sensor can detect the position of the plug seat, thereby detecting whether the movable plug has been displaced to the correct position, and then feeding back whether the clamping cylinder has been clamped in place. Attached Figure Description

[0019] Figure 1 This is a perspective view of the positioning and clamping mechanism in one embodiment of this application;

[0020] Figure 2 This is a cross-sectional view of the positioning and clamping mechanism in one embodiment of this application;

[0021] Figure 3 This is a perspective view of the clamping cylinder in one embodiment of this application;

[0022] Figure 4 This is a perspective view of the pressing device in one embodiment of this application;

[0023] Figure 5This is a perspective view of the product to be press-fitted in one embodiment of this application;

[0024] In the diagram: 1. Cylinder body; 2. Fixed plug; 3. Movable plug; 4. Positioning cylinder; 5. Clamping cylinder; 501. Cylinder body; 502. Valve gripper; 6. First vent hole; 7. Second vent hole; 8. First air pipe connector; 9. Second air pipe connector; 10. Plug seat; 11. Detection seat; 12. Displacement sensor; 13. Upper mounting plate; 14. Lower mounting plate; 15. Side support plate; 16. Magnetic shielding tube; 17. Upper pressure head; 18. Valve body. Detailed Implementation

[0025] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply 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.

[0028] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] like Figures 1 to 3As shown, a positioning and clamping mechanism for assembling a solenoid valve includes a cylinder body 1. A fixed plug 2 is provided inside the cylinder body 1. A movable plug 3 is provided between the top plate of the cylinder body 1 and the fixed plug 2. The fixed plug 2 has a vertically penetrating first through hole in its middle. The movable plug 3 has a variable diameter structure, allowing its upper part to slide against the inner wall of the cylinder body 1, and its lower part to pass through and slide against the first through hole. The movable plug 3 has a vertically penetrating second through hole, within which a positioning cylinder 4 is fitted. The upper end passes through the top plate of the cylinder 1 and is fixedly connected to the cylinder 1. The upper inner wall of the positioning cylinder 4 is provided with an inner conical surface. The inner side of the positioning cylinder 4 is movably fitted with a clamping cylinder 5. The clamping cylinder 5 includes a cylinder 501 and a plurality of valve grippers 502 arranged circumferentially at the upper end of the cylinder 501. The upper outer wall of the plurality of valve grippers 502 is provided with an outer conical surface that mates with the inner conical surface. The middle parts of the plurality of valve grippers 502 surround to form a contour hole. The lower end of the clamping cylinder 5 extends out of the positioning cylinder 4 and is fixedly connected to the movable plug 3.

[0030] Preferably, there are three valve clamps 502, which form a cylindrical structure that can both clamp and ensure accurate axial positioning.

[0031] The valve body 18 to be press-fitted is placed into the contour hole composed of three valve clamps 502. At this time, the three valve clamps 502 are not yet clamped. Since the movable plug 3 is fixedly connected to the clamping cylinder 5, the movable plug 3 is driven to move downward, which in turn causes the clamping cylinder 5 to move downward as well. During the downward movement of the clamping cylinder 5, the inner conical surface of the positioning cylinder 4 presses against the outer conical surface of the valve clamps 502, causing the three valve clamps 502 to tighten inward, thereby clamping the valve body 18 and making the valve body 18 and the clamping cylinder 5 coaxial.

[0032] After the pressing is completed, the moving plug 3 is driven to move upward, which in turn causes the clamping cylinder 5 to move upward as well. During the upward movement of the clamping cylinder 5, the outer conical surfaces of the three valve grippers 502 disengage from the inner conical surfaces of the positioning cylinder 4 and reset, thereby relaxing the clamping on the valve body 18.

[0033] The above solution drives the movable plug 3 to move up and down, thereby clamping and releasing the clamping cylinder 5 on the valve body 18, which facilitates automated operation. While clamping the valve body 18, it also positions the valve body 18 to ensure that the valve body 18 and the clamping cylinder 5 are coaxial, thus ensuring that the valve body 18 will not tilt during press-fitting, thereby improving the coaxiality of the product after press-fitting.

[0034] In some embodiments, the side wall of the cylinder body 1 is provided with a first vent hole 6 and a second vent hole 7. The first vent hole 6 is connected to a first air pipe connector 8, and the second vent hole 7 is connected to a second air pipe connector 9. The first vent hole 6 is located between the top plate of the cylinder body 1 and the movable plug 3, and the second vent hole 7 is located between the movable plug 3 and the fixed plug 2. The first air pipe connector 8 and the second air pipe connector 9 are used to connect air pipes to allow air to pass through the cylinder body 1. By allowing air to pass through the first vent hole 6 and simultaneously allowing air to pass through the second vent hole 7, the movable plug 3 can be driven to move downward. By allowing air to pass through the second vent hole 7 and simultaneously allowing air to pass through the first vent hole 6, the movable plug 3 can be driven to move upward. The movable plug 3 is driven pneumatically, which only requires control by an electrically controlled air valve, and the control method facilitates automated operation.

[0035] In some embodiments, a first sealing ring is provided between the upper outer wall of the movable plug 3 and the inner wall of the cylinder 1, and a second sealing ring is provided between the inner wall of the first through hole and the outer wall of the positioning cylinder 4, thereby improving the airtightness between the movable plug 3 and the top plate of the cylinder 1; a third sealing ring is provided between the inner wall of the fixed plug 2 and the lower outer wall of the movable plug 3, and a fourth sealing ring is provided between the outer wall of the fixed plug 2 and the inner wall of the cylinder 1, thereby improving the airtightness between the fixed plug 2 and the movable plug 3.

[0036] In some embodiments, the lower end of the movable plug 3 is fixedly connected to a plug seat 10. The plug seat 10 has a vertically penetrating third through hole. The lower end of the clamping cylinder 5 is inserted into the third through hole. The plug seat 10 also has a horizontally arranged first threaded hole communicating with the third through hole. A fastening bolt is screwed into the third through hole to fix the plug seat and the clamping cylinder. By setting the plug seat 10 as a connecting member, a fixed connection between the movable plug 3 and the clamping cylinder 5 is achieved, making disassembly and installation more convenient.

[0037] In some embodiments, this application further includes a fixed bracket, which is bolted to the bottom of the cylinder body 1. A detection seat 11 is connected to the fixed bracket, and the detection seat 11 has a vertically penetrating first mounting hole. A displacement sensor 12 is installed in the first mounting hole, and the displacement sensor 12 is bolted to the detection seat 11. The probe of the displacement sensor 12 is aligned with the bottom of the plug seat 10. By setting up the fixed bracket, the cylinder body 1 is fixed, and the detection seat 11 is installed. The displacement sensor 12 can detect the position of the plug seat 10, thereby detecting whether the movable plug 3 has been displaced into position, and thus providing feedback on whether the clamping cylinder 5 is clamped in place.

[0038] In some embodiments, the fixing bracket includes an upper mounting plate 13, a lower mounting plate 14, and two side support plates 15. The upper mounting plate 13 and the lower mounting plate 14 are arranged parallel to each other, and the two side support plates 15 are vertically connected between the upper mounting plate 13 and the lower mounting plate 14. The upper mounting plate 13 has a vertically penetrating second mounting hole, and the detection seat 11 is fitted into the second mounting hole. The detection seat 11 is fixed to the upper mounting plate 13 by bolts. The two side support plates 15, the upper mounting plate 13, and the lower mounting plate 14 form an installation space, which facilitates the installation and removal of the detection seat 11 and the displacement sensor 12.

[0039] In some embodiments, the inner wall of the cylinder body 1 is provided with a limiting ring platform to restrict the upward displacement of the fixing plug 2, and the side wall of the cylinder body 1 is provided with a second threaded hole. The second threaded hole is connected to a limiting bolt, which is screwed into the inner side of the cylinder body 1 to restrict the downward displacement of the fixing plug 2. During installation, the fixing plug 2 is inserted from the lower side of the cylinder body 1 until the fixing plug 2 abuts against the limiting ring platform, thereby achieving the upper limit of the fixing plug 2. Then, the limiting bolt is screwed into the second threaded hole to abut against the lower side of the fixing plug 2, thereby achieving the lower limit of the fixing plug 2. This achieves the detachable fixing of the fixing plug 2, making installation and disassembly operations more convenient and facilitating maintenance.

[0040] Another aspect of this application provides a press-fitting device for assembling a solenoid valve, including the aforementioned positioning and clamping mechanism, and further including an upper press head 17 and a drive device for driving the upper press head 17 to rise and fall, wherein the upper press head 17 is located above the positioning and clamping mechanism.

[0041] Figure 4 A drawing of a press-fitting device including the clamping mechanism of this application; Figure 5 This is a drawing of the product to be press-fitted, including the magnetic shielding tube 16 and the valve body 18; please refer to... Figure 4 and Figure 5 The working principle of the press-fitting device is as follows: the magnetic shielding tube 16 of the solenoid valve to be press-fitted is installed into the upper press head 17 for positioning, the valve body 18 is installed into the clamping cylinder 5 for positioning, and then the upper press head is driven to press down, so that the inner wall of the magnetic shielding tube 16 is interference-fitted with the outer wall of the valve body 18. By controlling the pressing distance of the upper press head, the magnetic shielding tube 16 and the valve body 18 are press-fitted to a predetermined stroke, thereby realizing the pre-press-fitting of the magnetic shielding tube 16 and the valve body 18.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art 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 appended claims and their equivalents.

Claims

1. A positioning and clamping mechanism for assembling a solenoid valve, characterized in that, Includes a cylinder body (1), the inside of which is provided a fixed plug (2), and a movable plug (3) is provided between the top plate of the cylinder body (1) and the fixed plug (2), and the middle of the fixed plug (2) is provided with a first through hole that penetrates vertically; The movable plug (3) has a variable diameter structure, so that the upper part of the movable plug (3) slides in cooperation with the inner wall of the cylinder (1), and the lower part of the movable plug (3) passes through the first through hole and slides in cooperation with the first through hole; The movable plug (3) is provided with a vertical through second through hole, and a positioning cylinder (4) is sleeved inside the second through hole. The upper end of the positioning cylinder (4) passes through the top plate of the cylinder body (1) and is fixedly connected to the cylinder body (1). The upper inner wall of the positioning cylinder (4) is provided with an inner conical surface. The positioning cylinder (4) is movably fitted with a clamping cylinder (5). The clamping cylinder (5) includes a cylinder body (501) and a plurality of valve grippers (502) spaced circumferentially at the upper end of the cylinder body (501). The upper outer wall of the plurality of valve grippers (502) is provided with an outer conical surface that mates with the inner conical surface. The middle part of the plurality of valve grippers (502) surrounds and forms a contour hole. The lower end of the clamping cylinder (5) extends out of the positioning cylinder (4) and is fixedly connected to the movable plug (3).

2. The positioning and clamping mechanism for assembling a solenoid valve according to claim 1, characterized in that, The side wall of the cylinder (1) is provided with a first vent hole (6) and a second vent hole (7). The first vent hole (6) is connected to a first air pipe connector (8), and the second vent hole (7) is connected to a second air pipe connector (9). The first vent hole (6) is located between the top plate of the cylinder (1) and the movable plug (3), and the second vent hole (7) is located between the movable plug (3) and the fixed plug (2).

3. The positioning and clamping mechanism for assembling a solenoid valve according to claim 1, characterized in that, A first sealing ring is provided between the upper outer wall of the movable plug (3) and the inner wall of the cylinder (1); a second sealing ring is provided between the inner wall of the first through hole and the outer wall of the positioning cylinder (4); a third sealing ring is provided between the inner wall of the fixed plug (2) and the lower outer wall of the movable plug (3); and a fourth sealing ring is provided between the outer wall of the fixed plug (2) and the inner wall of the cylinder (1).

4. The positioning and clamping mechanism for assembling a solenoid valve according to claim 1, characterized in that, The lower end of the movable plug (3) is fixedly connected to a plug seat (10). The plug seat (10) is provided with a vertically penetrating third through hole. The lower end of the clamping cylinder (5) is inserted into the third through hole. The plug seat (10) is provided with a horizontally arranged first threaded hole that communicates with the third through hole. The plug seat (10) and the clamping cylinder (5) are fixed in the third through hole by screwing in a fastening bolt.

5. The positioning and clamping mechanism for assembling a solenoid valve according to claim 4, characterized in that, The device includes a fixed bracket, which is fixed to the bottom of the cylinder (1) by bolts. The fixed bracket is connected to a detection seat (11), which has a vertical through first mounting hole. A displacement sensor (12) is installed in the first mounting hole. The displacement sensor (12) is fixed to the detection seat (11) by bolts. The probe of the displacement sensor (12) is aligned with the bottom of the plug seat (10).

6. The positioning and clamping mechanism for assembling a solenoid valve according to claim 5, characterized in that, The fixed bracket includes an upper mounting plate (13), a lower mounting plate (14), and two side support plates (15). The upper mounting plate (13) and the lower mounting plate (14) are arranged parallel to each other, and the two side support plates (15) are vertically connected between the upper mounting plate (13) and the lower mounting plate (14). The upper mounting plate (13) is provided with a vertically penetrating second mounting hole, and the detection seat (11) is fitted into the second mounting hole. The detection seat (11) is fixed to the upper mounting plate (13) by bolts.

7. The positioning and clamping mechanism for assembling a solenoid valve according to claim 1, characterized in that, The inner wall of the cylinder (1) is provided with a limiting ring platform to restrict the upward displacement of the fixed plug (2). The side wall of the cylinder (1) is provided with a second threaded hole. The second threaded hole is connected to a limiting bolt. The limiting bolt is screwed into the inner side of the cylinder (1) and restricts the downward displacement of the fixed plug.

8. A press-fitting device for assembling a solenoid valve, characterized in that, The positioning and clamping mechanism includes any one of claims 1 to 7, and further includes an upper pressure head and a driving device for driving the upper pressure head to rise and fall, wherein the upper pressure head is disposed above the positioning and clamping mechanism.

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