A cushioning type press-fitting device and a press-fitting method for assembling an electromagnetic valve

Abstract

The application relates to the technical field of electromagnetic valve assembly, in particular to a buffer type press-fitting device and press-fitting method for electromagnetic valve assembly, which comprises a base, a supporting column fixed on the base, a receiving plate and a fixed plate fixed on the supporting column, and a machining table for bearing a valve body fixed on the receiving plate; a lifting assembly arranged on the fixed plate, the lifting assembly being connected with symmetrically-arranged supporting plates; an elastic press-fitting mechanism arranged on the supporting plates, the elastic press-fitting mechanism comprising a press-fitting plate; a guide assembly arranged on the press-fitting plate, and a clearance clamping mechanism connected with the guide assembly and used for clamping a valve core and arranged on the press-fitting plate; through cooperation of the elastic press-fitting mechanism and the clearance clamping mechanism, circumferential rotating force and axial downward pressure can be provided for the valve core when the valve core and the valve body are in a misaligned state, so that positioning action is performed on the valve core during press-fitting.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electromagnetic valve assembly, in particular to a buffer type press-fitting device and press-fitting method for electromagnetic valve assembly. BACKGROUND

[0002] In the electromagnetic valve assembly process, press-fitting is one of the key steps of assembly, mainly used for the assembly of sealing parts or precision parts to ensure tight fit and not damage the parts.

[0003] The press-fitting process includes the press-fitting of the sealing part, the press-fitting of the valve core and the valve body, and the press-fitting of the coil shell. As for the press-fitting of the valve core and the valve body, it is necessary to ensure the coaxiality of the key of the valve core and the keyway of the valve body to avoid jamming caused by deflection.

[0004] Therefore, before press-fitting, the valve core needs to be stacked on the valve body by a mechanical hand, and the valve core angle is adjusted by a visual detector cooperating with the mechanical hand to ensure smooth press-fitting.

[0005] However, in actual operation, with the long-term use of visual positioning, it will have a small error itself, and the mutual superposition of vibration error when controlling the mechanical hand to position and displace may cause the key of the valve core and the keyway of the valve body to be in a misaligned state. If the press-fitting force is directly applied, the contact surface pressure exceeds the material yield strength, which will inevitably cause plastic deformation of the valve core and the valve body. SUMMARY

[0006] The purpose of the present application is to provide a buffer type press-fitting device and press-fitting method for electromagnetic valve assembly to solve the problems raised in the background.

[0007] To achieve the above purpose, the present application provides the following technical scheme:

[0008] A buffer type press-fitting device for electromagnetic valve assembly, comprising:

[0009] a base and a support column fixed on the base, the support column is fixed with a receiving plate and a fixed plate, the receiving plate is fixed with a processing table for carrying the valve body;

[0010] characterized in that it further comprises:

[0011] a lifting assembly arranged on the fixed plate, the lifting assembly is connected with a support plate arranged symmetrically;

[0012] a elastic press-fitting mechanism arranged on the support plate, the elastic press-fitting mechanism comprises a press-fitting plate;

[0013] The guide assembly is arranged on the pressing plate, and a displacement clamping mechanism for clamping the valve core is arranged on the pressing plate and connected with the guide assembly; the elastic pressing mechanism can perform the rotating positioning and pressing operation on the valve core through the displacement clamping mechanism when the resistance borne by the pressing plate fluctuates.

[0014] As a further scheme of the present application, the elastic pressing mechanism comprises a fixed sleeve fixed on the support plate, a rotating rod penetrating through the support plate and axially sliding in the fixed sleeve, the rotating rod is fixedly connected with the pressing plate, a fixed ring is fixed on the rotating rod, a second spring is sleeved on the rotating rod, and the two ends of the second spring are respectively abutted against the support plate and the fixed ring.

[0015] As a further scheme of the present application, the elastic pressing mechanism further comprises a guide groove formed on the circumferential outer wall of the rotating rod, and a limiting block is fixed on the inner wall of the fixed sleeve and slidingly fitted in the guide groove.

[0016] As a further scheme of the present application, the guide groove comprises a first spiral groove, a second spiral groove and a straight groove formed on the circumferential outer wall of the rotating rod, and the first spiral groove, the second spiral groove and the straight groove are sequentially and mutually connected.

[0017] As a further scheme of the present application, the displacement clamping mechanism comprises a sliding groove symmetrically arranged on the pressing plate, and a sliding block slidingly installed in the sliding groove.

[0018] Further comprising a driven assembly arranged on the sliding block and used for clamping the valve core.

[0019] As a further scheme of the present application, the driven assembly comprises a connecting plate fixed on the side wall of the sliding block, a movable rod slidingly installed on the connecting plate, and a limiting ring fixed on the end of the movable rod and abutted against the connecting plate.

[0020] As a further scheme of the present application, the driven assembly further comprises a clamping plate fixed on the movable rod, a displacement block fixed on the side of the clamping plate away from the pressing plate, a first spring sleeved on the movable rod, and the two ends of the first spring are respectively abutted against the clamping plate and the connecting plate.

[0021] As a further scheme of the present application, the guide assembly comprises a second air cylinder fixed on the pressing plate, and a limiting plate fixedly connected with the sliding block is arranged on the telescopic end of the second air cylinder.

[0022] As a further scheme of the present application: the lifting assembly comprises a guide rail fixed on the fixed plate, a sliding sleeve is slidingly installed on the guide rail, a movable plate fixedly connected with the support plate is fixed on the side wall of the sliding sleeve, and a first air cylinder fixedly connected with the movable plate is fixed on the fixed plate.

[0023] A buffer type press fitting method for assembling an electromagnetic valve comprises the following steps:

[0024] Step one: sequentially place the valve body and the valve core to be press fitted on the processing table;

[0025] Step two: under the action of the lifting assembly, the elastic press fitting mechanism is controlled to move to drive the press fitting plate to move towards the valve core, and the press fitting plate will clamp the valve core through the give-way clamping mechanism;

[0026] Step three: if the key arranged on the valve core is in a misaligned state with the key groove in the valve body, the press fitting plate cannot move, and under the action of the elastic press fitting mechanism, the press fitting plate and the give-way clamping mechanism provide the valve core with axial downward pressure and circumferential rotating force to position the valve core;

[0027] Step four: when the valve core enters the valve body and the press fitting plate performs a pressure maintaining action on the valve core, the guide assembly controls the give-way clamping mechanism to separate from the valve core.

[0028] Compared with the prior art, the present application has the beneficial effect that: before press fitting, the valve core is provided with axial downward pressure and circumferential rotating force to compensate for the misaligned angle of the valve core and the valve body caused by the overlapping error of the visual sensor error and the mechanical hand vibration, specifically, under the action of the lifting assembly, the elastic press fitting mechanism is controlled to move to control the give-way clamping mechanism to move through the press fitting plate, the give-way clamping mechanism can clamp the valve core, if the key of the valve core is in an aligned state with the key groove of the valve body, the press fitting plate can directly perform press fitting, if the key of the valve core is in a misaligned state with the key groove of the valve body, the elastic press fitting mechanism will provide the valve core with axial downward pressure and circumferential rotating force through the press fitting plate and the give-way clamping mechanism to compensate for the misaligned angle caused by the error, thereby ensuring that the valve core can be smoothly press fitted into the valve body.

[0029] By the change of the resistance of the press fitting plate, it can be judged whether the key of the valve core is in an aligned state with the key groove of the valve body, and when the resistance changes, the valve core is provided with axial downward pressure and circumferential rotating force to compensate for the misalignment caused by the error overlap, thereby ensuring that the valve core can be smoothly inserted into the valve body, in this way, through the mutual cooperation of the visual sensor and the rotating positioning, the problem that the contact surface pressure exceeds the material yield strength to cause plastic deformation of the valve core and the valve body is avoided when the valve core is directly press fitted in a misaligned state.

[0030] By letting the bit block control card plate automatically let the bit, can increase the card plate to the spool clamping range, at the same time, under the action of the first spring, can provide the spool elastic clamping force, prevent because directly using hydraulic cylinder or other drive source drive card plate displacement, and lead to the spool is clamped force too big, and then appear the spool deformation problem, under the action of the card plate, also can balance the pressure provided by the pressure plate, so that the spool insertion keeps stable state, avoid because the spool pressure process appears offset, lead to with the valve body key groove friction and damage problem. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 Structure schematic diagram of an embodiment of the buffer type pressure assembly device for electromagnetic valve assembly.

[0032] Figure 2 Structure schematic diagram of another angle of an embodiment of the buffer type pressure assembly device for electromagnetic valve assembly.

[0033] Figure 3 Connection relationship schematic diagram of the elastic pressure assembly mechanism, part of the let go clamping mechanism, part of the guide assembly in an embodiment of the buffer type pressure assembly device for electromagnetic valve assembly.

[0034] Figure 4 For Figure 3 Structure enlarged schematic diagram of A in the middle.

[0035] Figure 5 For Figure 3 Structure schematic diagram of another angle.

[0036] Figure 6 Structure schematic diagram of part of the elastic pressure assembly mechanism, guide assembly in an embodiment of the buffer type pressure assembly device for electromagnetic valve assembly.

[0037] Figure 7 Connection relationship schematic diagram of the elastic pressure assembly mechanism, let go clamping mechanism, guide assembly in an embodiment of the buffer type pressure assembly device for electromagnetic valve assembly.

[0038] Figure 8 Structure schematic diagram of part of the elastic pressure assembly mechanism, let go clamping mechanism in an embodiment of the buffer type pressure assembly device for electromagnetic valve assembly.

[0039] Figure 9 Explosion structure schematic diagram of the pressure plate, let go clamping mechanism in an embodiment of the buffer type pressure assembly device for electromagnetic valve assembly.

[0040] Figure 10 Explosion structure schematic diagram of the elastic pressure assembly mechanism in an embodiment of the buffer type pressure assembly device for electromagnetic valve assembly.

[0041] In the figure: 1, base; 2, support column; 3, receiving plate; 4, machining table; 5, fixed plate; 6, guide rail; 7, sliding sleeve; 8, movable plate; 9, first cylinder; 10, support plate; 11, fixed sleeve; 1101, limiting block; 12, rotating rod; 1201, first spiral groove; 1202, second spiral groove; 1203, straight groove; 13, press-fitting plate; 1301, sliding groove; 14, sliding block; 15, connecting plate; 16, movable rod; 1601, limiting ring; 17, clamping plate; 18, clearance block; 19, first spring; 20, limiting plate; 21, second cylinder; 22, fixed ring; 23, second spring. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0043] In addition, the elements in the present application are referred to as "fixed to" or "provided on" another element, which can be directly on another element or can have a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or can have a middle element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0044] Please refer to Figures 1-10 In the embodiments of the present application, a buffer type press-fitting device for assembling an electromagnetic valve comprises:

[0045] The base 1 and the support column 2 fixed on the base 1, the support column 2 is fixed with the receiving plate 3 and the fixed plate 5, the receiving plate 3 is fixed with the machining table 4 for carrying the valve body;

[0046] Further comprising:

[0047] The lifting assembly is arranged on the fixed plate 5, and the support plates 10 arranged symmetrically are connected to the lifting assembly;

[0048] The elastic press-fitting mechanism is arranged on the support plate 10, and the elastic press-fitting mechanism comprises the press-fitting plate 13;

[0049] The guiding assembly is arranged on the pressing plate 13, and a clearance clamping mechanism for clamping the valve core is arranged on the pressing plate 13 and connected with the guiding assembly; the elastic pressing mechanism can perform the rotating positioning and pressing action on the valve core through the clearance clamping mechanism when the resistance borne by the pressing plate 13 fluctuates.

[0050] Specifically, when the valve core and the valve body are assembled, it is necessary to ensure that the key of the valve core is aligned with the key groove of the valve body, so as to ensure that the valve core can be smoothly inserted into the valve body. For this purpose, when the robot places the valve body and the valve core on the machining table 4, and the valve core is stacked on the valve body, the key position of the outer wall of the valve core can be detected by the visual sensor, and the angle of the valve core can be adjusted by the robot. However, the mutual superposition of the error of visual positioning itself, the repeated positioning of the robot, and the vibration error when the robot is displaced may cause the actual positioning accuracy to deviate. If the pressing force is directly applied, the valve core or the valve body may be damaged. For this purpose, when the lifting assembly works, the elastic pressing mechanism is driven to move by the supporting plate 10, so that the pressing plate 13 moves towards the valve core. Under the action of the pressing plate 13, the valve core is clamped by the clearance clamping mechanism. If the positioning between the valve core and the valve body has no error, the valve core can be smoothly inserted into the valve body under the action of the pressing plate 13, so as to complete the pressing action. If the positioning between the valve core and the valve body is in a misaligned state due to error, the valve core cannot enter the valve body, and the position of the pressing plate 13 does not change. The elastic pressing mechanism continues to move, and the pressing plate 13 and the clearance clamping mechanism provide the valve core with an axial downward pressure and a circumferential rotating force, so that the valve core reciprocally deviates by a certain angle, thereby positioning and compensating for the error. When the key of the valve core is aligned with the key groove of the valve body, the valve core can be smoothly inserted into the valve body under the action of the downward pressure. At this time, the pressing plate 13 continues to move, thereby performing the pressing action on the valve core. When the insertion depth of the valve core reaches the maximum, the pressing plate 13 no longer moves. Under the action of the guiding assembly, the clearance clamping mechanism is controlled to be separated from the valve core. After the pressing is completed, the lifting assembly controls the supporting plate 10 to reset, and the above steps are repeated, thereby realizing the continuous pressing of the valve core and the valve body.

[0051] Please refer to Figures 1-3 The lifting assembly comprises a guide rail 6 fixed on the fixed plate 5, a sliding sleeve 7 slidably installed on the guide rail 6, an activity plate 8 fixedly connected with the supporting plate 10 and fixed on the side wall of the sliding sleeve 7, and a first air cylinder 9 fixedly connected with the activity plate 8 and fixed on the fixed plate 5.

[0052] Please refer to Figures 1-8The elastic press-fitting mechanism comprises a fixing sleeve 11 fixed on the support plate 10, a rotating rod 12 axially sliding in the fixing sleeve 11 and penetrating through the support plate 10, the rotating rod 12 being fixedly connected with the press-fitting plate 13, a fixing ring 22 fixed on the rotating rod 12, and a second spring 23 sleeved on the rotating rod 12, the two ends of the second spring 23 being respectively abutted against the support plate 10 and the fixing ring 22, the elastic press-fitting mechanism further comprising a guide groove formed on the circumferential outer wall of the rotating rod 12, and a limiting block 1101 fixed on the inner wall of the fixing sleeve 11 and slidingly fitted in the guide groove, the guide groove comprising a first spiral groove 1201, a second spiral groove 1202 and a straight groove 1203 formed on the circumferential outer wall of the rotating rod 12, the first spiral groove 1201, the second spiral groove 1202 and the straight groove 1203 being sequentially connected with each other.

[0053] Please refer to Figure 8 In detail, the first spiral groove 1201 and the second spiral groove 1202 are arranged in a spiral shape and have opposite spiral directions, so that when the limiting block 1101 slides in the first spiral groove 1201 and the second spiral groove 1202, the rotating rod 12 can be controlled to perform the forward rotation and reverse rotation actions.

[0054] Please refer to Figure 3 In the initial state, the second spring 23 is in a compressed state, so that the rotating rod 12 is controlled by the fixing ring 22 to be located at the stroke end away from the fixing sleeve 11, and the limiting block 1101 is located at the stroke end away from the second spiral groove 1202 on the side of the first spiral groove 1201, so that the distance between the movable plate 8 and the machining table 4 is maximum under the action of the first air cylinder 9, and the press-fitting plate 13 is located at the stroke end away from the machining table 4.

[0055] When the valve core and the valve body need to be press-fitted, the valve body can be placed on the machining table 4 by the mechanical hand, and the valve core can be stacked on the valve body by the mechanical hand, and at the same time, the position of the key on the valve core is detected by the visual sensor, so that the valve core is controlled by the mechanical hand to be deflected by a certain angle until the key of the valve core is aligned with the key groove of the valve body.

[0056] Subsequently, the movable plate 8 is controlled to move under the action of the first air cylinder 9, so as to drive the sliding sleeve 7 to move along the length direction of the guide rail 6, the guide rail 6 has a guiding effect, so as to ensure that the movable plate 8 will not be deviated during movement, thereby ensuring the stability of the press-fitting plate 13 during press-fitting, the movable plate 8 further drives the fixing sleeve 11 to move synchronously through the support plate 10, so as to drive the rotating rod 12 to move through the second spring 23 and the fixing ring 22, so that the press-fitting plate 13 continuously moves towards the valve core, and the press-fitting plate 13 further drives the give-way clamping mechanism to move, so as to center the valve core under the action of the give-way clamping mechanism and clamp the valve core.

[0057] When the pressing plate 13 is in abutment with the valve core, if there is no error during adjustment by the mechanical arm, the key of the valve core and the key groove of the valve body are matched with each other, so that the valve core smoothly enters the valve body. At this time, the sliding friction between the valve core and the valve body is small, the second spring 23 can overcome the sliding friction, and the valve core continuously enters the valve body through the pressing plate 13;

[0058] If the key of the valve core and the key groove of the valve body are in a misaligned state due to vibration or visual sensing error during adjustment by the mechanical arm, and the misalignment angle is very small, the valve core cannot enter the valve body. At this time, the pressing plate 13 no longer moves, the fixed sleeve 11 continues to move towards the valve core, and the limiting block 1101 slides along the first spiral groove 1201, thereby driving the rotating rod 12 to rotate in the positive direction. The rotating rod 12 will control the valve core to rotate through the pressing plate 13 and the relief clamping mechanism. At this time, the valve core will be subjected to the dual action of axial downward pressure and circumferential rotating force. If the rotation direction of the valve core is consistent with the misalignment direction, after rotating for a certain angle, the key of the valve core will move to the matching position with the key groove of the valve body. Under the action of the downward pressure, the valve core quickly enters the valve body. If the rotation direction of the valve core is opposite to the misalignment direction, when the limiting block 1101 moves to the position where the first spiral groove 1201 is connected with the second spiral groove 1202, the angle of the rotating rod 12 rotating in the positive direction reaches the maximum. When the limiting block 1101 enters the second spiral groove 1202, the rotating rod 12 will reverse to drive the valve core to rotate towards the misalignment direction until the key of the valve core is aligned with the key groove of the valve body. The valve core will smoothly enter the valve body.

[0059] When the insertion depth of the valve core reaches the maximum, the position of the pressing plate 13 no longer changes. At this time, the fixed sleeve 11 can be controlled to continue to move to compress the second spring 23, thereby increasing the pressing force of the pressing plate 13 on the valve core. In this process, since the valve body is not in a fixed state, the valve core performs a rotating action, and the pressing pressure between the valve core and the valve body has not been reached, therefore, it will not affect the normal performance of subsequent pressing and pressure maintaining. At this time, the limiting block 1101 will enter the straight groove 1203. When the pressing force reaches the set value, the first cylinder 9 no longer moves. After maintaining the pressure for a certain time, the first cylinder 9 controls the pressing plate 13 to reset, and the above steps are repeated, thereby realizing continuous pressing of the valve core and the valve body.

[0060] Preferably, by the change of resistance of the pressing plate 13, it can be judged whether the key of the valve core and the key groove of the valve body are in the aligned state, and when the resistance changes, the valve core is provided with axial downward pressure and circumferential rotating force to compensate for the misalignment caused by error superposition, so as to ensure that the valve core can smoothly enter the valve body. In this way, through the mutual cooperation of the visual sensor and the rotary positioning, the problem that the contact surface pressure exceeds the material yield strength, causing plastic deformation of the valve core and the valve body, is avoided when directly pressing the valve core in the misaligned state.

[0061] The pressure sensor is arranged on the pressing plate 13. If the valve core and the valve body are stuck during assembly due to a too large tolerance range, the pressure sensor detects that the pressure exceeds the set value, the first cylinder 9 controls the pressing plate 13 to reset, and the valve core is taken out under the action of the spacing clamping mechanism, so that the detection rate of abnormal assembly is improved.

[0062] Please refer to Figures 1-3 、 Figures 5-9 , the spacing clamping mechanism includes a sliding groove 1301 symmetrically arranged on the pressing plate 13, and the sliding block 14 is slidably arranged in the sliding groove 1301, and the limiting plate 20 is fixed on the sliding block 14; the follower assembly arranged on the sliding block 14 is used for clamping the valve core, the follower assembly includes a connecting plate 15 fixed on the side wall of the sliding block 14, the movable rod 16 is slidably arranged on the connecting plate 15, the limiting ring 1601 is fixed on the end of the movable rod 16 and abuts against the connecting plate 15, the clamping plate 17 is fixed on the movable rod 16, the spacing block 18 is fixed on the side of the clamping plate 17 away from the pressing plate 13, the first spring 19 is sleeved on the movable rod 16, and the two ends of the first spring 19 abut against the clamping plate 17 and the connecting plate 15 respectively.

[0063] Please refer to Figures 1-3 、 Figures 4-6 , the guiding assembly includes a second cylinder 21 fixed on the pressing plate 13, and the limiting plate 20 fixedly connected with the sliding block 14 is fixed on the telescopic end of the second cylinder 21.

[0064] Please refer to Figure 7 , further, the spacing block 18 is arranged in an inclined manner, in the initial state, the spacing between the two sliding blocks 14 is controlled to be minimum by the limiting plate 20 under the action of the second cylinder 21, the first spring 19 is in a pre-compressed state, so that the two movable rods 16 are located at the end of the stroke in the direction of approaching each other, so that the limiting ring 1601 abuts against the connecting plate 15, at this time, the spacing between the two clamping plates 17 is minimum, and the spacing between the end portions of the two spacing blocks 18 away from each other is greater than the size of the valve core.

[0065] When the valve core needs to be pressed, at this time, the control support plate 10 is moved under the action of the lifting assembly, so that the pressing plate 13 is moved towards the valve core direction through the fixed sleeve 11 and the rotating rod 12, and the sliding block 14 is also moved to drive the displacement block 18 and the clamping plate 17 to move, when the inclined surface of the displacement block 18 abuts against the end surface of the valve core, the displacement block 18 will displace, and the two displacement blocks 18 move away from each other, thereby driving the two clamping plates 17 to move, the clamping plate 17 will control the movable rod 16 to move, so that the limiting ring 1601 is separated from the connecting plate 15, and the first spring 19 is compressed, when the displacement block 18 is separated from the valve core, and the clamping plate 17 abuts against the circumferential outer wall of the valve core, under the action of the clamping plate 17, the valve core can be clamped, at this time, the pressing plate 13 continues to move, until the pressing plate 13 abuts against the valve core, the valve core can be pressed.

[0066] If the key of the valve core is aligned with the key groove of the valve body, under the action of the pressing plate 13, the valve core is inserted into the valve body, if the key of the valve core is misaligned with the key groove of the valve body, the pressing plate 13 cannot move, the fitting size of the fixed sleeve 11 and the rotating rod 12 is increased, so that the limiting block 1101 slides in the first spiral groove 1201 and the second spiral groove 1202 to control the rotating rod 12 to rotate forward and backward, the rotating rod 12 will drive the sliding block 14 to move through the pressing plate 13 to compensate for the misalignment of the valve core through the clamping plate 17;

[0067] Under the action of the clamping plate 17, the valve core can be stably inserted into the valve body, when the insertion depth of the valve core reaches the maximum, the position of the pressing plate 13 no longer changes, at this time, the second cylinder 21 controls the two sliding blocks 14 to move along the length direction of the sliding groove 1301 and move away from each other through the limiting plate 20, thereby driving the clamping plate 17 to move through the movable rod 16, so that the clamping plate 17 is separated from the valve core, when the valve core is pressed into place, under the action of the lifting assembly, the pressing plate 13 is controlled to reset, since the clamping plate 17 is separated from the valve core, the valve core will not be separated from the valve body, when the pressing plate 13 is reset, the two clamping plates 17 are controlled to reset again through the second cylinder 21, and the above steps are repeated, thereby assisting the valve core to be smoothly pressed.

[0068] Preferably, under the action of the displacement block 18, the clamping plate 17 can be automatically displaced to increase the applicable range of the clamping plate 17 for clamping the valve core, and under the action of the first spring 19, the elastic clamping force of the valve core can be provided to prevent the valve core from being deformed due to the displacement of the clamping plate 17 driven by a hydraulic cylinder or other driving source directly, and under the action of the clamping plate 17, the pressing force provided by the pressing plate 13 can be balanced to keep the valve core stable during insertion, thereby avoiding the problem that the valve core is damaged due to the friction with the key groove of the valve body caused by the deviation of the valve core during the pressing process.

[0069] A buffer type press fitting method for assembling an electromagnetic valve, comprising the following steps:

[0070] Step one: sequentially place the valve body and the valve core to be press fitted on the processing table 4;

[0071] Step two: under the action of the lifting assembly, control the elastic press fitting mechanism to move through the supporting plate 10, so as to drive the press fitting plate 13 to move towards the valve core direction, and the press fitting plate 13 will be clamped by the valve core through the let-go clamping mechanism;

[0072] Step three: if the key arranged on the valve core is in a misaligned state with the key groove in the valve body, the press fitting plate 13 cannot move, and under the action of the elastic press fitting mechanism, the valve core is provided with axial downward pressure and circumferential rotation force through the press fitting plate 13 and the let-go clamping mechanism, so as to position the valve core;

[0073] Step four: when the valve core enters the valve body and the press fitting plate 13 performs the pressure maintaining action on the valve core, the guiding assembly controls the let-go clamping mechanism to separate from the valve core.

[0074] It is apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the present application being defined by the appended claims rather than the above description, and it is intended that all changes that come within the meaning and range of equivalency of the claims are embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0075] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A buffer-type press-fitting device for assembling a solenoid valve, comprising: A base, and a support column fixed on the base, wherein a receiving plate and a fixing plate are fixed on the support column, and a processing table for supporting the valve body is fixed on the receiving plate; Its characteristic is that it further includes: A lifting assembly is mounted on the fixed plate, and symmetrically arranged support plates are connected to the lifting assembly. An elastic pressing mechanism is disposed on the support plate, the elastic pressing mechanism including a pressing plate; A guide component is provided on the press plate, and the press plate is also provided with a relief clamping mechanism connected to the guide component for clamping the valve core. The elastic press mechanism can perform a rotational positioning press action on the valve core through the relief clamping mechanism when the resistance on the press plate fluctuates. The elastic pressing mechanism includes a fixed sleeve fixed to the support plate, a rotating rod that slides axially through the support plate inside the fixed sleeve, the rotating rod being fixedly connected to the pressing plate, a fixed ring being fixed on the rotating rod, and a second spring being sleeved on the rotating rod, with the two ends of the second spring abutting against the support plate and the fixed ring respectively. The elastic pressing mechanism further includes a guide groove formed on the outer circumference of the rotating rod, and a limiting block that slides and engages with the guide groove is fixed on the inner wall of the fixed sleeve. The guide groove includes a first spiral groove, a second spiral groove, and a straight groove formed on the outer circumference of the rotating rod, wherein the first spiral groove, the second spiral groove, and the straight groove are sequentially connected to each other.

2. The buffer-type press-fitting device for assembling a solenoid valve according to claim 1, characterized in that, The clearance clamping mechanism includes symmetrically arranged sliding grooves formed on the pressure plate, and a sliding block is slidably installed in the sliding groove; It also includes a driven component disposed on the sliding block for performing a clamping action on the valve core.

3. The buffer-type press-fitting device for assembling a solenoid valve according to claim 2, characterized in that, The driven component includes a connecting plate fixed to the side wall of the sliding block, a movable rod slidably mounted on the connecting plate, and a limiting ring fixed to the end of the movable rod abutting against the connecting plate.

4. The buffer-type press-fitting device for assembling a solenoid valve according to claim 3, characterized in that, The driven component also includes a retaining plate fixed on the movable rod, a clearance block fixed on the side of the retaining plate away from the pressing plate, and a first spring sleeved on the movable rod, with the two ends of the first spring abutting against the retaining plate and the connecting plate respectively.

5. A buffer-type press-fitting device for assembling a solenoid valve according to claim 2, characterized in that, The guiding component includes a second cylinder fixed on the press plate, and a limiting plate fixedly connected to the sliding block is fixed to the telescopic end of the second cylinder.

6. The buffer-type press-fitting device for assembling a solenoid valve according to claim 1, characterized in that, The lifting assembly includes a guide rail fixed to the fixed plate, a sliding sleeve slidably mounted on the guide rail, a movable plate fixedly connected to the support plate on the side wall of the sliding sleeve, and a first cylinder fixedly connected to the movable plate on the fixed plate.

7. A buffered press-fitting method for assembling a solenoid valve, employing the buffered press-fitting device for assembling a solenoid valve as described in any one of claims 1-6, characterized in that, Includes the following steps: Step 1: Place the valve body and valve core to be press-fitted onto the processing table in sequence; Step 2: Under the action of the lifting component, the elastic pressing mechanism is controlled by the support plate to move, so as to drive the pressing plate to move towards the valve core. The pressing plate will clamp the valve core through the clearance clamping mechanism. Step 3: If the key on the valve core is misaligned with the keyway in the valve body, the pressure plate cannot move. Under the action of the elastic pressure mechanism, the pressure plate and the clearance clamping mechanism provide axial downward pressure and circumferential rotational force to the valve core to position the valve core. Step 4: After the valve core enters the valve body, and the pressure plate performs a pressure-holding action on the valve core, the guide component controls the separation of the clamping mechanism from the valve core.

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