CN111250950A - A solenoid valve spool and steel ball assembly device and assembly process thereof - Google Patents

Abstract

The invention relates to an electromagnetic valve core and steel ball assembling device and an assembling process thereof. The device includes the base, is provided with fixed cover, pressure head, push rod and ejector pin on the base, fixed cover is located directly over the base to with base sliding fit, the pressure head top is equipped with power device, and it has the pressure equipment hole to open at the positive center of pressure head, and pressure equipment hole one side is opened there is the goal hole, the push rod includes anterior segment, interlude and back end, the ejector pin is located the steel ball directly over, ejector pin lower extreme and pressure equipment hole sliding fit. The invention has the advantages that: the problem that the steel ball is inconvenient to place each time due to undersize in the valve core assembling process is solved, the closing-up operation in the valve core and steel ball assembling process is realized, and the valve core and steel ball assembling machine has the characteristics of high assembling efficiency, small occupied space and convenience in operation.

Description

A solenoid valve spool and steel ball assembly device and assembly process thereof

technical field

The invention relates to a valve core assembly device and an assembly process thereof, in particular to an electromagnetic valve valve core and steel ball assembly device and an assembly process thereof.

Background technique

Solenoid valve spool is one of the key components for opening and closing the solenoid valve. In order to ensure the lasting reliability of the spool, steel balls are usually embedded in the front end of the solenoid valve, and the solenoid valve can be opened or closed through the cooperation of the steel ball and the valve seat. The valve core directly processes the front end of the valve core into a spherical shape. Although the assembly process of the solenoid valve is simplified, in practice, there are problems that the integrated valve core is difficult to process and the material cost is high. Therefore, the combination of the valve core and the steel ball is still widely used. The solenoid valve is being manufactured. In order to improve the assembly efficiency and reliability of the solenoid valve core and the steel ball, and prevent the steel ball from loosening or the material at the front end of the valve core from blocking the cooperation between the steel ball and the valve seat after the assembly is completed, a device that is easy to assemble the valve core and the steel ball and its equipment are designed. Assembly process is very necessary.

Patents CN106112469A and CN106112441A describe a sliding valve core and steel ball assembly device and a corresponding assembly process. The device includes a base plate, and a valve core mold mounted on the base plate is used to fix the valve core and prevent the valve core from being assembled during the assembly process. Bending occurs in the middle of the valve core, and a pressure plate connected to the power unit is arranged just above the valve core mold. Although the device adopts the design of the mold and the adjusting screw sleeve, which reduces the adjustment time of the valve core steel ball assembly process, but the device needs to install the steel ball in the valve core mold for each assembly, because the actual size of the steel ball is small. The clamping is inconvenient, so it is not conducive to the assembly and mass production of the valve core steel ball. At the same time, since the pressure rod under the pressure plate is threaded in the adjusting threaded sleeve, when assembling the steel ball, it is easy to cause extrusion damage to the thread where the pressure rod and the adjusting threaded sleeve fit together, reducing the reliability of the device.

The patent CN203437899U improves the design of the steel ball pressing mechanism proposed by CN202388205U. The main design changes are: the bracket, the intermediate sleeve and the push rod and other sliding parts are designed to be only the push rod and the main body. The installation requirements of the axial degree can prevent the damage of the pressure head due to the bias of the steel ball due to long-term work; by setting a magnet in the press-fitting hole to replace the marble oil cup, it can prevent the steel ball from rolling out of the front end of the press-fitting tube and reduce the mechanical strength of the press-fitting mechanism. loss, and improve the interchangeability of the press-fitting mechanism. This type of steel ball press-fitting mechanism can realize rapid press-fitting of steel balls, and is only suitable for lateral power devices, not suitable for power devices that provide pressure in the vertical direction, and this type of press-fit mechanism cannot complete the closing of the top of the valve core. Operation.

In view of the above problems existing in the prior art, the prior art is improved. Because the steel ball is too small, it is inconvenient to place the steel ball on the valve core each time. Set up a cavity to receive the steel ball, and use magnet adsorption to prevent the steel ball from rolling freely; use a sleeve-type fixing device to ensure the valve core and the steel ball. The bottom end of the pressure head is set into two sections of conical surface to realize the closing of the valve core and the steel ball assembly process. This device is very beneficial to the power device using the servo press.

SUMMARY OF THE INVENTION

The purpose of the present invention is, in view of the above problems, to propose a solenoid valve valve core and steel ball assembly device and its assembly process, which solves the problem that the steel ball is too small in the valve core assembly process to be inconvenient to be placed each time, and overcomes the problem of the valve core assembly process. It is difficult to center, and there is no problem of clamping and bending, which realizes the closing operation during the assembly process of the valve core and the steel ball, and has the characteristics of high assembly efficiency, small space occupation and convenient operation.

The technical scheme adopted by the present invention to solve its technical problems is:

An assembly device for a solenoid valve core and a steel ball, comprising a base, a fixed sleeve, a pressure head, a push rod and a push rod; the fixed sleeve is located just above the base and slides with the base (sliding up and down), There is a fixing hole for fixing the valve core under the fixing sleeve. The fixing hole adopts a stepped type that matches the shape of the valve core. There is a hole B on the top for sliding fit with the pressure head, and a hole A on the left side for sliding fit with the push rod. The axis A is lower than the axis of hole E in the indenter at the initial installation position, and the top of the fixed sleeve is symmetrically opened with a hole C for installing the limit block; a power device is arranged above the indenter, and the end face of the indenter is provided with a limit block located on the top of the indenter. The annular shoulder B directly above has a press-fitting hole in the center of the indenter, and a goal hole is opened on one side of the press-fit hole. The goal hole is parallel to the press-fit hole. One end of E is connected with the press-fitting hole, and the other end is connected with the hole armor in the fixing sleeve. The upper surface of the pressure head is provided with a chute, and the chute is symmetrically arranged with a hole. A spring is installed inside the hole, and one end of the spring contacts the hole. The bottom surface, the other end is embedded in the hole in the top rod; the push rod includes a front section, a middle section and a rear section, the front section of the push rod is deep into the hole E, the middle section of the push rod is slidably matched with the hole armor, and the rear section of the push rod The segment restricts the rightward movement of the push rod, and the front end of the front end of the push rod is embedded with a magnet; the push rod is located directly above the steel ball, and the lower end of the push rod is slidably matched with the press-fitting hole.

Further, the base is of a stepped type, the bottom surface of the base is provided with shoulder armor, the center of the base is provided with a boss, and the boss is located just below the fixing hole.

Further, a limit plate is arranged on the base, the limit plate is loosely fitted with the base, and the height of the limit plate after installation is higher than the height of the push rod after installation, so as to limit the maximum stroke of the push rod to move to the left.

Further, the diameter of the front section of the push rod is smaller than the middle section, and the sum of the lengths of the front section and the middle section of the push rod is equal to the sum of the hole lengths of the hole A and the hole E, and the total length of the push rod should ensure that when the push rod moves to the left In the extreme position, the magnet in the push rod is located to the left of the goal hole in the indenter.

Further, the bottom end of the press-fitting hole is sequentially provided with a cone surface A and a cone surface B from top to bottom, and the slope of the cone surface A is greater than that of the cone surface B.

Further, the ejector rod is T-shaped, the upper end of the ejector rod is in the shape of a dumbbell, and the thickness of the upper end of the ejector rod is equal to the depth of the chute, so as to ensure that the circumferential force of the steel ball is uniform during the pressing process of the indenter.

Further, the limit block is made of rubber material. Because the rubber material has a certain buffering effect, it can effectively prevent the indenter from overshooting too much, and at the same time, it can prevent the front end of the push rod from being affected by objects such as the indenter during the process of taking out the fixing sleeve. Self-weight effects.

Further, the power device adopts a force control method, which can effectively reduce the scrap rate of assembly.

An assembly process of a solenoid valve core and a steel ball assembly device, comprising the following steps:

Step 1: Put the solenoid valve spool upside down on the boss in the center of the base, and use the fixing sleeve to fix the middle and upper sections of the spool;

Step 2: Pull the push rod to the leftmost end to contact the limit plate, put a steel ball in the goal hole at the top of the indenter, and push the push rod to the rightmost end;

Step 3: Turn on the power unit, push the ejector rod to press down the steel ball to the top of the valve core, the lowering of the ejector rod will drive the pressure head to move downward, and the cone surface A and the cone surface B in the pressure head can realize the correcting of the valve core during the descending process. The top closing operation, after the closing is completed, the top material of the valve core wraps the steel ball, and the diameter of the valve core closing is smaller than the diameter of the steel ball;

Step 4: When the power unit detects that the force on the pressure head reaches the set threshold, it stops moving downward, resets the power unit, and directly takes out the fixing sleeve and the components installed on the fixing sleeve, and then takes out the valve core. Assembly of valve spool and steel ball.

Compared with the prior art, the beneficial effects of the present invention are:

The invention solves the problem that the steel ball is too small and inconvenient to be placed each time during the assembly process of the valve core, overcomes the problems of difficult alignment and easy bending without clamping during the assembly process of the valve core, and realizes the closing of the valve core and the steel ball during the assembly process. It has the characteristics of high assembly efficiency, small footprint and convenient operation.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the fixed sleeve structure schematic diagram of the present invention;

Fig. 3 is the push rod structure schematic diagram of the present invention;

Fig. 4 is the top view of the indenter of the present invention;

Fig. 5 is a sectional view of the indenter of the present invention rotated in the direction A.

Description of the drawings: base 1, boss 2, valve core 3, fixed sleeve 4, shoulder armor 5, limit plate 6, push rod 7, magnet 8, indenter 9, ejector rod 10, steel ball 11, Limit block 12, spring 13, fixing hole 401, hole A 402, hole B 403, hole C 404, front section 701, middle section 702, rear section 703, chute 901, goal hole 902, hole D 903, press fit Hole 904, hole Wu 905, shoulder B 906, hole 907, cone surface A 908, cone surface B 909.

Detailed ways

In order to better understand the present invention, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

As shown in Figure 1, a solenoid valve valve core and steel ball assembly device, including a base 1, the base 1 is provided with a fixed sleeve 4, a pressure head 9, a push rod 7 and a push rod 10; the base 1 is a stepped type. The bottom surface of the base 1 is provided with a shoulder armor 5. On the one hand, the shoulder armor 5 reduces the pressure from the assembly of the valve core 3 and the steel ball 11, and on the other hand is beneficial to fix the base 1 under the power unit. On the platform, the center of the base 1 is provided with a boss 2, and the boss 2 is located just below the fixing hole 401 in the fixing sleeve 4. The boss 2 is used to fix the bottom end of the inverted valve core 3, so that the valve core 3 remains Vertical state; a limit plate 6 is provided on one side of the base 1, and the limit plate 6 is loosely fitted with the base 1, which is convenient for the replacement and disassembly of the limit plate 6. In order to limit the leftward movement of the push rod 7, the limit The height of the bit plate 6 after installation should be set higher than the height of the push rod 7 after installation.

As shown in FIG. 2 , the fixing sleeve 4 is located directly above the base 1 and slidingly cooperates with the base 1 to facilitate the installation and removal of the fixing sleeve 4 , thereby facilitating the picking and placing of the valve core 3 ; the fixing sleeve 4 A fixing hole 401 for fixing the middle and upper section of the valve core 3 is opened at the bottom. The fixing hole 401 adopts a stepped type that matches the shape of the valve core 3 to prevent the valve core 3 from being bent due to excessive pressure when the valve core 3 is assembled with the steel ball 11; the fixing sleeve 4. There is a hole B 403 on the upper side that is slidingly matched with the indenter 9, and a hole A 402 is opened on the left side that is slidingly matched with the push rod 7. The axis in the hole A 402 is lower than the hole E 905 in the indenter 9 at the initial installation position. The top end is symmetrically opened with holes C 404 for fixing the limit block 12; the limit block 12 is made of rubber material, and because the rubber material has a certain buffering effect, it can effectively prevent the shoulder B 906 in the indenter 9 The amount of lower punching can be avoided, and at the same time, during the process of taking out the fixing sleeve 4, the front end of the push rod 7 is subjected to the gravity of the indenter 9 and other objects, and the phenomenon of extrusion and bending can be avoided.

As shown in FIG. 3 , the push rod 7 includes a front section 701 , a middle section 702 and a rear section 703 . The front section 701 of the push rod 7 is deep into the hole 905 of the indenter 9 , and the middle section 702 of the push rod 7 is connected to the hole 905 of the indenter 9 . A 402 is slidingly fitted, and the rear section 703 of the push rod 7 limits the stroke of the push rod 7 to move to the right; the diameter of the front section 701 of the push rod 7 is smaller than the middle section 702, so when the push rod 7 is installed, the axis of the front section 701 is lower than the pressure head The axis of hole 905 in 9, the upper surface of hole 905 will not squeeze with the push rod 7 during the assembly process of the valve core 3 and the steel ball 11; the sum of the lengths of the front section 701 and the middle section 702 of the push rod 7 is equal to The sum of the hole lengths of the hole A 402 and the hole E 905 ensures that when the push rod 7 moves to the limit position to the right, the rigid ball 11 can completely enter the press-fit hole 904 in the indenter 9; the total length of the push rod 7 should ensure that When the push rod 7 moves to the left to the extreme position, the magnet 8 in the push rod 7 is located on the left side of the goal hole 902 in the indenter 9. Since the magnet 8 attracts the steel ball 11, it cannot freely escape from the ball 11 in the indenter 9. The hole 905 is rolled into the press-fit hole 904, and at the same time, the free rolling of the remaining steel balls 11 in the goal hole 902 in the indenter 9 can be restricted.

As shown in FIG. 4 and FIG. 5 , a power device is provided above the indenter 9, and the power device adopts a force control method, which can effectively reduce the scrap rate of the assembly of the valve core 3 and the steel ball 11; There is an annular shoulder B 906 located just above the limit block 12, the purpose is to contact the limit block 12 to prevent the indenter 9 from being over punched; the center of the indenter 9 is provided with a press-fitting hole 904, and the press-fitting hole 904 and The lower end of the ejector rod 10 is slidably fitted, and a goal hole 902 is opened on one side of the press-fitting hole 904. The orifice of the goal hole 902 is set on the upper surface of the pressure head 9, which is conducive to adding multiple steel balls 11 at one time and improving product assembly. Efficiency; a hole 905 is provided below the goal hole 902, one end of the hole 905 is communicated with the press-fitting hole 904, and the other end is communicated with the hole armor 402 in the fixed sleeve 4; the upper surface of the indenter 9 is provided with a chute 901, A hole 903 is symmetrically arranged on the chute 901, and a spring 13 is installed inside the hole 903. One end of the spring 13 contacts the bottom surface of the hole 903, and the other end is embedded in the hole 907 in the ejector rod 10. The spring 13 resets the ejector rod 10, which is a steel ball. 11 Enter the press-fitting hole 904 again to prepare; the ejector rod 10 is T-shaped, and the upper end of the ejector rod 10 is in the shape of a dumbbell, which is convenient for the removal and replacement of the ejector rod 10, and the larger bearing area is conducive to the closing operation of the top of the valve core 3 , the thickness of the upper end of the ejector rod 10 is equal to the depth of the chute 901, so as to ensure that the chute 901 has a uniform pressure on the valve core 3 and the steel ball 11 during the assembly process; And cone surface B 909, in which the slope of cone surface A 908 is greater than that of cone surface B 909. Under the action of the power device, the cone surface B 909 first contacts the top of the valve core 3 to compress and deform, and the cone surface A 908 can ensure deformation. The material will not produce too much plastic deformation allowance, so that the performance of the assembled product cannot meet the specified requirements.

An assembly process of a solenoid valve core and a steel ball assembly device, the specific steps are as follows:

Step 1: Take out the fixing sleeve 4 and the components installed on the fixing sleeve 4, place the solenoid valve spool 3 upside down on the boss 2 in the center of the base 1, and then use the fixing sleeve 4 to fix the middle and upper sections of the valve spool 3, in order Install the indenter 9 in the hole B 403, and install the ejector rod 10 in the press-fit hole 904. Because the springs 13 are installed on both sides of the ejector rod 10, the bottom end of the ejector rod 10 is pushed away from the hole E 905;

Step 2: Insert the push rod 7 into the hole armor 402 in the fixing sleeve 4 and the hole E 905 in the indenter 9, fix the limit plate 6 on the base 1, and pull the push rod 7 to the left limit position, that is, the push rod The rear section 703 of the push rod 7 is in contact with the limit plate 6, put several steel balls 11 in the goal hole 902 at the top of the indenter 9, and push the push rod 7 to the right limit position, that is, the rear section 703 of the push rod 7 is fixed with The outer surface of the sleeve 4 is in contact, and the push rod 7 pushes one steel ball 11 into the press-fit hole 904 at a time. At this time, the steel ball 11 is still attracted by the magnet 8 at the top of the push rod 7 and does not fall;

Step 3: Turn on the power device located above the indenter 9, the power device will push the ejector rod 10 to compress the spring 13, the indenter 9 will also move down due to the action of the spring force, and the ejector rod 10 will move downward until it completely touches the indenter 9. After the sliding groove 901 on the surface, the pressure head 9 and the ejector rod 10 will move downward as a whole. During the downward movement of the ejector rod 10, the steel ball 11 in the pressing hole 904 will be pushed to the top of the valve core 3. The cone surface A 908 and the cone surface B 909 in 9 realize the closing operation on the top of the valve core 3 during the descending process. After the closing is completed, the top material of the valve core 3 wraps the steel ball 11, and the closing diameter of the valve core 3 is smaller than the diameter of the steel ball 11;

Step 4: When the power unit detects that the force on the indenter 9 reaches the set threshold, it stops the downward movement and resets the power unit. At this time, due to the restoring force of the spring 13 in the hole 903, the ejector rod 10 will be reset. To the initial position, directly take out the fixing sleeve 4 and the components installed on the fixing sleeve 4 together, without taking out the components on the fixing sleeve 4 separately, which is conducive to the next assembly of the valve core 3 and the steel ball 11, and then take out the assembled Valve core 3, the assembly of solenoid valve core 3 and steel ball 11 is now completed.

The above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. There are other variations and modifications under the premise of not exceeding the technical solutions described in the claims.

Claims (8)

1. An assembly device for a solenoid valve core and a steel ball, characterized in that it comprises a base (1), a fixing sleeve (4), a pressure head (9), a push rod (7) and a push rod (10); The fixing sleeve (4) is located directly above the base (1), and is slidingly matched with the base (1). A fixing hole (401) for fixing the valve core (3) is opened under the fixing sleeve (4), and the fixing hole ( 401) adopts a stepped type that matches the shape of the valve core (3), with a hole B (403) on the upper side for sliding fit with the pressure head (9), and a hole A (402) on the left side for sliding fit with the push rod (7). ), the axis of hole A (402) is lower than the axis of hole E (905) in the indenter (9) at the initial installation position, and the top of the fixing sleeve (4) is symmetrically opened with a hole C (404) for installing the limit block (12). ); a power device is provided above the indenter (9), the end face of the indenter (9) is provided with an annular shoulder B (906) directly above the stop block (12), and the center of the indenter (9) is provided with an annular shoulder B (906). The press-fitting hole (904) is provided with a goal hole (902) on one side of the press-fitting hole (904). Hole E (905), one end of hole E (905) is communicated with the press-fitting hole (904), and the other end is communicated with the hole A (402) in the fixing sleeve (4). The slot (901), the slot (901) is symmetrically provided with a hole (903), a spring (13) is installed inside the hole (903), one end of the spring (13) contacts the bottom surface of the hole (903), and the other end is embedded in the ejector rod The hole (907) in (10); the push rod (7) includes a front section (701), a middle section (702) and a rear section (703), and the front section (701) of the push rod (7) is deep in the hole E In (905), the middle section (702) of the push rod (7) is slidingly matched with the hole armor (402), and the rear section (703) of the push rod (7) restricts the rightward movement of the push rod (7), and the push rod ( A magnet (8) is embedded in the front end of the front section (701) of 7); the ejector rod (10) is located just above the steel ball (11), and the lower end of the ejector rod (10) is slidably fitted with the press-fitting hole (904). 2. A solenoid valve spool and steel ball assembling device according to claim 1, characterized in that: the base (1) is a stepped type, and the bottom surface of the base (1) is provided with shoulder armor (5) , the center of the base (1) is provided with a boss (2), and the boss (2) is located just below the fixing hole (401). 3. A solenoid valve spool and steel ball assembling device according to claim 1, characterized in that: a limit plate (6) is arranged on the base (1), the limit plate (6) and the base (1) Loosely match, the height of the limit plate (6) after installation is higher than the height of the push rod (7) after installation, so as to limit the maximum stroke of the push rod (7) to the left. 4. A solenoid valve spool and steel ball assembly device according to claim 1, characterized in that: the diameter of the front section (701) of the push rod (7) is smaller than the diameter of the middle section (702), and the push rod (7) The sum of the lengths of the front section (701) and the middle section (702) is equal to the sum of the hole lengths of the hole A (402) and the hole E (905). When the left movement reaches the limit position, the magnet (8) in the push rod (7) is located on the left side of the goal hole (902) in the indenter (9). 5. A solenoid valve spool and steel ball assembling device according to claim 1, characterized in that: the bottom end of the press-fitting hole (904) is sequentially provided with a cone surface armor (908) and a cone (908) from top to bottom. For face B (909), the slope of cone face A (908) is greater than that of cone face B (909). 6. A solenoid valve spool and steel ball assembly device according to claim 1, characterized in that: the ejector rod (10) is T-shaped, the upper end of the ejector rod (10) is in the shape of a dumbbell, and the ejector rod (10) is in the shape of a dumbbell. ), the thickness of the upper end is equal to the depth of the chute (901). 7. An assembly device for a solenoid valve core and a steel ball according to claim 1, wherein the limiting block (12) is made of rubber material. 8. An assembly process of a solenoid valve core and a steel ball assembly device, characterized in that it comprises the following steps: Step 1: Put the solenoid valve spool (3) upside down on the boss (2) in the center of the base (1), and use the fixing sleeve (4) to fix the middle and upper sections of the spool (3); Step 2: Pull the push rod (7) to the far left to contact the limit plate (6), put the steel ball (11) into the goal hole (902) at the top of the indenter (9), push the push rod (7) ) to the far right; Step 3: Turn on the power unit, push the ejector rod (10) to press down the steel ball (11) to the top of the valve core (3), and the ejector rod (10) will push down the indenter (9) to move down, and the indenter (9) ) in the cone surface A (908) and the cone surface B (909) in the descending process to realize the closing operation on the top of the valve core (3). (3) The closing diameter is smaller than the diameter of the steel ball (11); Step 4: When the power unit detects that the force on the indenter (9) reaches the set threshold, it stops moving downward, resets the power unit, and directly takes out the fixing sleeve (4) and the components installed on the fixing sleeve (4). , and then take out the valve core (3), thus completing the assembly of the solenoid valve core (3) and the steel ball (11).

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