Coining pressure measuring device for assembling electromagnetic valve

Abstract

The utility model discloses a coining measuring device for assembling an electromagnetic valve, which comprises a lower mounting bracket, and a clamping assembly and a measuring assembly which are fixedly connected with the lower mounting bracket, and the clamping assembly is used for clamping and positioning a valve body of the electromagnetic valve; the measuring assembly comprises a lifting driving device, a stroke measuring rod and an ejector rod, the stroke measuring rod and the ejector rod are vertically arranged and are aligned in axis, a driving block of the lifting driving device is fixedly connected with the stroke measuring rod, the upper end of the stroke measuring rod is elastically matched with the lower end of the ejector rod in an abutting mode, and the clamping assembly limits and guides the ejector rod. The ejector rod moves up and down relative to the clamping assembly and is aligned with moving iron at the bottom of the electromagnetic valve up and down; the stroke measuring rod is used for converting the relative displacement of the ejector rod into a corresponding electric signal; according to the utility model, the real distance between the moving iron and the fixed iron is measured, the purpose of accurate press fitting is realized, the same set of equipment is used for integrated operation from measurement to press fitting, the efficiency is high, the automation degree is high, and the product press fitting precision is high.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically to a precision pressure measuring device for assembling solenoid valves. Background Technology

[0002] like Figure 5 As shown, the solenoid valve of the automotive ABS includes a magnetic shielding tube, a fixed iron, a moving iron, and a valve body. The fixed iron is riveted and fixed inside the magnetic shielding tube, and the lower end of the moving iron is movably abutting against the valve body. A spring is provided between the fixed iron and the moving iron, and the magnetic shielding tube is interference-fitted with the valve body.

[0003] The press-fitting of solenoid valves requires ensuring that the distance between the stationary iron and the moving iron meets the process requirements. The existing press-fitting method is to pre-set the press-fitting stroke of the magnetic shielding tube and press it into place in one go. By controlling and improving the accuracy of the stroke, the press-fitting accuracy is guaranteed. However, due to design and manufacturing errors, the actual dimensions of each set of magnetic shielding tubes, stationary iron, moving iron, and valve body are inconsistent. Sometimes, even if the stroke is controlled very precisely, it is difficult to achieve the expected results. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the prior art by providing a precision pressure measuring device for solenoid valve assembly. This device measures the actual distance between the moving iron and the stationary iron, achieving precise pressing. The entire process from measurement to pressing is done using the same integrated equipment, resulting in high efficiency, high automation, and high product pressing accuracy.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A precision pressure measuring device for assembling a solenoid valve includes a lower mounting bracket and a clamping assembly and a measuring assembly fixedly connected to the lower mounting bracket. The clamping assembly is used to clamp and position the valve body of the solenoid valve. The measuring assembly includes a lifting drive device, a stroke measuring rod, and a push rod. The stroke measuring rod and the push rod are both vertically arranged and their axes are aligned. The drive block of the lifting drive device is fixedly connected to the stroke measuring rod. The upper end of the stroke measuring rod elastically abuts against the lower end of the push rod. The clamping assembly limits and guides the push rod, allowing the push rod to move up and down relative to the clamping assembly and be vertically aligned with the bottom moving iron of the solenoid valve. The stroke measuring rod is used to convert the relative displacement of the push rod into a corresponding electrical signal.

[0007] The travel measuring rod includes a rod body, a measuring spring, a top block, and a displacement sensor. The upper end of the rod body is connected to the measuring spring, and the measuring spring is connected to the top block. The top block abuts against the lower end of the rod. The displacement sensor is fixedly installed inside the rod body. The displacement sensor converts the displacement change signal between itself and the top block into an electrical signal. A wire connector is fixedly provided on the outer peripheral wall of the rod body. The wire connector is used to allow the wire of the displacement sensor to pass through the side wall of the rod body and be clamped and fixed.

[0008] The clamping assembly includes a cylinder body fixedly connected to the lower mounting bracket. A fixed plug is located inside the cylinder body, and 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.

[0009] 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.

[0010] The clamping cylinder is fitted with a guide cylinder inside, and the push rod is slidably sleeved with the inner side of the guide cylinder. The upper end of the push rod is provided with a tip for extending into the solenoid valve.

[0011] The push rod has a diameter-reducing structure that decreases downwards, and the diameter-reducing structure forms a limiting end face. The inner wall of the guide cylinder is provided with an annular platform that abuts against the limiting end face, and the annular platform restricts the relative downward displacement of the push rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] By setting up a clamping assembly, the pre-pressurized solenoid valve product is clamped and positioned. The actual distance between the moving iron and the stationary iron is measured using a stroke measuring rod and a push rod. This distance is then subtracted from the predetermined value to obtain the stroke displacement required for fine pressing, thus achieving the purpose of precise pressing. The entire process from measurement to pressing is carried out using the same integrated equipment, which is highly efficient, highly automated, and provides high product pressing accuracy. Attached Figure Description

[0014] Figure 1 This is a perspective view of the precision pressure measuring device in one embodiment of this application;

[0015] Figure 2 This is a front view of the precision pressure measuring device in one embodiment of this application;

[0016] Figure 3 This is a cross-sectional view of a precision pressure measuring device in one embodiment of this application;

[0017] Figure 4 This is a perspective view of the measuring component in one embodiment of this application;

[0018] Figure 5 This is a cross-sectional view of the product to be press-fitted in this application;

[0019] In the diagram: 1. Lower mounting bracket; 2. Lifting drive device; 3. Stroke measuring rod; 4. Top rod; 5. Rod body; 6. Measuring spring; 7. Top block; 8. Displacement sensor; 9. Cable connector; 10. Cylinder body; 11. Fixed plug; 12. Movable plug; 13. Positioning cylinder; 14. Clamping cylinder; 15. First air pipe connector; 16. Second air pipe connector; 17. Guide cylinder; 18. Magnetic shielding tube; 19. Valve body; 20. Fixed iron; 21. Moving iron. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] like Figure 5 As shown, the product requiring precision pressing in this application is a solenoid valve for automotive ABS, including a magnetic shielding tube 18, a fixed iron 20, a moving iron 21, and a valve body 19. The fixed iron 20 is riveted and fixed inside the magnetic shielding tube 18, and the lower end of the moving iron 21 is movably abutting against the valve body 19. A spring is provided between the fixed iron 20 and the moving iron 21, and the magnetic shielding tube 18 and the valve body 19 are interference-fitted. Before precision pressing in this application, the product needs to be pre-pressed. The purpose of pre-pressing is to allow the magnetic shielding tube 18 and the valve body 19 to initially interference-fit together to form a whole. The purpose of precision pressing is to further precisely engage the magnetic shielding tube 18 and the valve body 19 to a predetermined stroke, so that the distance between the fixed iron 20 and the moving iron 21 meets the process requirements.

[0025] like Figures 1 to 4As shown, this application provides a precision pressure measuring device for assembling a solenoid valve, including a lower mounting bracket 1 and a clamping assembly and a measuring assembly fixedly connected to the lower mounting bracket. The clamping assembly is used to clamp and position the valve body of the solenoid valve. The measuring assembly includes a lifting drive device 2, a stroke measuring rod 3, and a top rod 4. The stroke measuring rod 3 and the top rod 4 are both vertically arranged and their axes are aligned. The drive block of the lifting drive device 2 is fixedly connected to the stroke measuring rod 3. The upper end of the stroke measuring rod 3 and the lower end of the top rod 4 are elastically engaged by a measuring spring. The clamping assembly limits and guides the top rod 4, allowing the top rod 4 to move up and down relative to the clamping assembly and be vertically aligned with the bottom moving iron of the solenoid valve. The stroke measuring rod 3 is used to convert the relative displacement of the top rod 4 into a corresponding electrical signal.

[0026] The above solution works as follows: First, the clamping assembly is used to clamp and position the pre-pressed solenoid valve product. At this time, the magnetic shielding tube 18 and the valve body 19 of the solenoid valve product are in a pre-pressed state and are a whole. Then, the measuring assembly is used to measure the distance between the fixed iron 20 and the moving iron 21 in the solenoid valve product. If the distance is greater than the process requirement distance, the specific difference is calculated. Based on the difference, the magnetic shielding tube 18 is further pressed down so that the distance between the fixed iron 20 and the moving iron 21 reaches the predetermined value, thereby achieving precise press-fitting.

[0027] The working principle of the measuring component is as follows: After the solenoid valve is clamped and positioned, the lifting drive device 2 drives the stroke measuring rod 3 to rise to a fixed stroke. During the process of the stroke measuring rod 3 driving the push rod 4 to rise, the upper end of the push rod 4 first extends into the opening at the lower end of the valve body 19 and abuts against the moving iron 21. The push rod 4 stops rising. At this time, the stroke measuring rod 3 continues to rise to a predetermined stroke, thereby compressing the measuring spring between the stroke measuring rod 3 and the push rod 4 to a predetermined value (the elasticity of the measuring spring is insufficient to make the push rod 4 lift the moving iron 21). Then, the moving iron 21 is attracted and raised by means such as magnetic adsorption until the moving iron 21 abuts against the fixed iron 20. At this time, the measuring spring lifts the push rod 4, so that the push rod 4 rises with the moving iron 21. The deformation of the measuring spring at this time is obtained by the displacement sensor in the stroke measuring rod 3, which is the upward displacement of the push rod 4 at this time, which is the interval distance between the moving iron 21 and the fixed iron 20.

[0028] By setting up a clamping assembly, the pre-pressurized solenoid valve product is clamped and positioned. The actual distance between the moving iron 21 and the fixed iron 20 is measured using the stroke measuring rod 3 and the push rod 4. This distance is then subtracted from the predetermined value to obtain the stroke displacement required for fine pressing, thus achieving the purpose of precise pressing. The entire process from measurement to pressing is carried out using the same integrated equipment, which is highly efficient, highly automated, and provides high product pressing accuracy.

[0029] In one embodiment, the stroke measuring rod 3 includes a rod body 5, a measuring spring 6, a top block 7, and a displacement sensor 8. The upper end of the rod body 5 is connected to the measuring spring 6, which is connected to the top block 7. The top block 7 abuts against the lower end of the top rod 4. The displacement sensor 8 is fixedly disposed inside the rod body 5. The displacement sensor 8 converts the displacement change signal between itself and the top block 7 into an electrical signal. A wire connector 9 is fixedly provided on the outer peripheral wall of the rod body 5. The wire connector 9 is used to allow the wire of the displacement sensor 8 to pass through the side wall of the rod body 5 and be clamped and fixed. The displacement sensor 8 is preferably a proximity sensor to achieve non-contact detection. By detecting the displacement change of the top block 7, the displacement change of the top rod 4 is detected.

[0030] In one embodiment, the clamping assembly includes a cylinder 10 fixedly connected to a lower mounting bracket 1. A fixed plug 11 is provided inside the cylinder 10. A movable plug 12 is provided between the top plate of the cylinder 10 and the fixed plug 11. The fixed plug 11 has a vertically penetrating first through hole in its middle. The movable plug 12 has a variable diameter structure, allowing its upper part to slide against the inner wall of the cylinder 10, and its lower part to pass through and slide against the first through hole. The movable plug 12 also has a vertically penetrating second through hole, within which is fitted a... The positioning cylinder 13 has its upper end passing through the top plate of the cylinder 10 and is fixedly connected to the cylinder 10. The upper inner wall of the positioning cylinder 13 is provided with an inner conical surface. A clamping cylinder 14 is movably sleeved inside the positioning cylinder 13. The clamping cylinder 14 includes a cylinder body and a number of valve grippers spaced circumferentially at the upper end of the cylinder body. The upper outer wall of the number of valve grippers is provided with an outer conical surface that mates with the inner conical surface. The middle parts of the number of valve grippers surround to form a contour hole. The lower end of the clamping cylinder 14 extends out of the positioning cylinder 13 and is fixedly connected to the movable plug 12.

[0031] The valve body 19 of the product to be pressed is placed into the contour hole composed of three valve claws. At this time, the three valve claws are not yet clamped. Since the movable plug 12 is fixedly connected to the clamping cylinder 14, the movable plug 12 is driven to move downward, which causes the clamping cylinder 14 to move downward as well. During the downward movement of the clamping cylinder 14, the inner conical surface of the positioning cylinder 13 presses against the outer conical surface of the valve claws, causing the three valve claws to tighten inward, thereby clamping the valve body 19 and making the valve body 19 and the clamping cylinder 14 coaxial.

[0032] Furthermore, the side wall of the cylinder body 10 is provided with a first vent hole and a second vent hole. The first vent hole is connected to a first air pipe connector 15, and the second vent hole is connected to a second air pipe connector 16. The first vent hole is located between the top plate of the cylinder body and the movable plug 12, and the second vent hole is located between the movable plug 12 and the fixed plug 11. The first air pipe connector 15 and the second air pipe connector 16 are used to connect air pipes to allow air to pass through and exhaust into the cylinder body 10. By allowing air to pass through the first vent hole and simultaneously exhausting air through the second vent hole, the movable plug 12 can be driven to move downward. By allowing air to pass through the second vent hole and simultaneously exhausting air through the first vent hole, the movable plug 12 can be driven to move upward. The movable plug 12 is driven pneumatically, which only requires control using an electronically controlled air valve, and the control method facilitates automated operation.

[0033] In one embodiment, a guide cylinder 17 is fixedly sleeved inside the clamping cylinder 14, and the push rod 4 is slidably sleeved with the inner side of the guide cylinder 17. The upper end of the push rod 4 is provided with a pointed part for extending into the solenoid valve. By setting the guide cylinder 17 to guide the displacement of the push rod 4, the accuracy of the push rod 4 is improved and the axial misalignment is prevented.

[0034] In one embodiment, the push rod 4 has a diameter-reducing structure that decreases downwards, forming a limiting end face. The inner wall of the guide cylinder 17 is provided with an annular platform that abuts against the limiting end face, limiting the relative downward displacement of the push rod 4. By setting the above-mentioned limiting structure, when the lifting drive device 2 is not in operation, the stroke measuring rod 3 and the push rod 4 are separated, and the push rod 4 remains in the guide cylinder 17 for easy lifting in the next operation. The measuring spring of the stroke measuring rod 3 is in a relaxed state, avoiding a decrease in accuracy caused by being in a compressed state for a long time.

[0035] 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. An electromagnetic valve assembly swaging measuring device characterized by comprising: The utility model provides a kind of electromagnetic valve measuring device, including lower mounting bracket (1) and the clamping assembly and measuring assembly fixedly connected with the lower mounting bracket (1), the clamping assembly is used to the valve body of the electromagnetic valve clamping positioning;The measuring assembly includes lifting drive device (2), stroke measuring rod (3) and top rod (4), the stroke measuring rod (3) and top rod (4) are vertically arranged and axis alignment, the driving block of lifting drive device (2) is fixedly connected with the stroke measuring rod (3), the upper end of the stroke measuring rod (3) is elastically abutted with the lower end of the top rod (4) and is matched, the clamping assembly is positioned to the top rod (4) and guides, the top rod (4) is moved up and down relative to the clamping assembly, and is vertically arranged with the bottom moving iron of the electromagnetic valve;The stroke measuring rod (3) is used to convert the relative displacement of the top rod (4) into corresponding electrical signal.

2. The precision press measuring device for assembling a solenoid valve according to claim 1, wherein The stroke measuring rod (3) includes rod body (5), measuring spring (6), top block (7) and displacement sensor (8), the upper end of the rod body (5) is connected measuring spring (6), the measuring spring (6) is connected the top block (7), the top block (7) is matched with the lower end of the top rod (4) and is abutted;The displacement sensor (8) is fixedly arranged in the inside of the rod body (5), the displacement sensor (8) converts the displacement change between it and the top block (7) into electrical signal, the outer peripheral wall of the rod body (5) is fixedly provided with wire passing joint (9), the wire passing joint (9) is used to make the wire of the displacement sensor (8) pass through the side wall of the rod body (5) and is clamped and fixed.

3. The precision measuring device for assembling an electromagnetic valve according to claim 1, wherein The clamping assembly includes cylinder body (10) fixedly connected with the lower mounting bracket (1), the inside of the cylinder body (10) is provided with fixed plug (11), the top plate of the cylinder body (10) is provided with movable plug (12) between the fixed plug (11), the middle part of the fixed plug (11) is provided with first through hole vertically penetrating;The movable plug (12) has variable diameter structure, so that the upper portion of movable plug (12) is slidably fitted with the inner wall of the cylinder body (10), the lower portion of the movable plug (12) penetrates the first through hole and is slidably fitted with the first through hole;The movable plug (12) is provided with second through hole vertically penetrating, the second through hole is sleeved with positioning cylinder (13), the upper end of the positioning cylinder (13) penetrates the top plate of the cylinder body (10) and is fixedly connected with the cylinder body (10), the inner wall of the upper end of the positioning cylinder (13) is provided with inner conical surface;The inside of the positioning cylinder (13) movably sleeves clamping cylinder (14), the clamping cylinder (14) includes cylinder body and a plurality of valve clamping jaws circumferentially and intervally arranged on the upper end surface of the cylinder body, the outer conical surface of the upper end outer wall of a plurality of valve clamping jaws is matched with the inner conical surface, and a plurality of valve clamping jaws are surrounded to form a profiled hole;The lower end of the clamping cylinder (14) extends out of the positioning cylinder (13) and is fixedly connected with the movable plug (12). The side wall of the cylinder (10) is provided with a first vent hole and a second vent hole, the first vent hole is connected with a first air pipe joint (15), and the second vent hole is connected with a second air pipe joint (16); the first vent hole is located between the top plate of the cylinder and the movable plug (12), and the second vent hole is located between the movable plug (12) and the fixed plug (11).

4. The precision measuring device for assembling an electromagnetic valve according to claim 3, wherein The inside of the clamping cylinder (14) is fixedly sleeved with a guide cylinder (17), the top rod (4) is slidably sleeved with the inside of the guide cylinder (17), and the upper end of the top rod (4) is provided with a sharp part for extending into the inside of the electromagnetic valve.

5. The swaging measuring device for an electromagnetic valve assembly according to claim 4, wherein The top rod (4) has a variable-diameter structure with a diameter decreasing downwards, the variable-diameter structure forms a limiting end face, the inner wall of the guide cylinder (17) is provided with a ring table abutting against the limiting end face, and the ring table limits the relative downward displacement of the top rod (4).

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