A solenoid valve stem assembly assembly

Abstract

The present application relates to the field of electromagnetic valve manufacturing, in particular to a kind of electromagnetic valve valve rod assembly assembly device, including the tool for loading valve rod and make valve rod in state time be in vertical state;Loading block has for loading upper spring seat loading bin, the loading bin has for the transverse gap of upper spring seat in and out loading bin, vertical press mechanism is used to drive loading block to move along vertical direction downward, so that lower spring seat abuts and compresses spring, finally make the position of lower spring seat lower than the position of snap spring on valve rod;Horizontal evacuation mechanism is used to drive loading block to move along the horizontal direction opposite to the transverse gap direction, so that loading block is separated from lower spring seat.By lower spring seat installation and press device, realize the automatic feeding and synchronous press of lower spring seat, realize the full-automatic assembly of valve rod assembly, effectively avoid the technical problems that spring is easily ejected from lower spring seat during operation, leading to spare parts loss and slow assembly speed.

Description

Technical Field

[0001] The invention relates to the field of solenoid valve manufacturing, and in particular to an assembly device for a solenoid valve stem component. Background Art

[0002] like Figure 1 The figure shows a cross-sectional structural diagram of a two-way five-way solenoid valve. Its core component is the valve stem assembly shown in the figure. The valve stem assembly includes a valve stem 1 (with a sealing ring) and a spring assembly installed on the valve stem 1. The spring assembly includes an upper spring seat 2, a lower spring seat 4, a spring 3 and a retaining spring 13. By applying a force to the end of the valve stem 1 of the valve stem assembly, the axial position of the valve stem 1 in the solenoid valve is changed to achieve different paths. The upper spring seat 2 and the lower spring seat 4 are in sliding fit with the valve stem 1. Applying an axial force to the valve stem 1 from one end will compress the spring 3. Conversely, applying an axial force to the valve stem 1 from the other end will compress the spring 3 in the opposite direction.

[0003] like Figure 2 and Figure 3 As shown, the assembly process of the valve stem assembly is to sequentially cover the upper spring seat 2, spring 3 and lower spring seat 4 on the valve stem 1, then axially press the lower spring seat 4 to compress the spring 3, and then assemble the retaining ring 13 into the retaining ring groove on the valve stem 1 to contact the outer side of the lower spring seat 4.

[0004] The aforementioned assembly process currently involves manually pre-assembling the upper spring seat 2, spring 3, and lower spring seat 4, then placing them on a dedicated semi-automatic jig. The lower spring seat 4 is then pressed down by a pressure block on the jig, and the retaining ring 13 is then pressed into the retaining ring groove. During the assembly process, spring 3 sometimes ejects the lower spring seat 4 before placement on the dedicated semi-automatic jig, interrupting the assembly process. This not only disrupts the workflow but can also cause parts to become scattered or even lost during assembly.

[0005] Based on the above-mentioned deficiencies in the prior art, the present application aims to provide a fully automatic assembly device for assembling a valve stem assembly. Summary of the Invention

[0006] To address the above-mentioned problems, a solenoid valve stem assembly assembly device is provided. Through the fully automatic assembly operation of the valve stem assembly, the technical problem that the spring easily pops out the lower spring seat during the manual cooperation with the semi-automatic assembly fixture operation, resulting in the loss of parts and slow assembly speed is solved.

[0007] To solve the prior art problems, the present application provides a solenoid valve valve rod assembly assembling device for installing a spring assembly on a valve rod to form a valve rod assembly, comprising a jig for loading the valve rod and making the valve rod in a vertical state; a valve rod loading device, an upper spring seat installation device, a spring installation device, a lower spring seat installation and pressing device, a circlip installation device, a valve rod assembly unloading device and a jig moving device;

[0008] The lower spring seat installation and pressing device is used for sleeving a lower spring seat on the valve rod in the jig and pressing the compression spring downward and making the upper surface of the lower spring seat lower than the circlip groove.

[0009] The lower spring seat installation and pressing device comprises:

[0010] The loading block has a loading cavity for loading the upper spring seat, the loading cavity has a transverse gap for the upper spring seat to enter and exit the loading cavity, and the loading block is provided with a through hole penetrating the loading cavity and through which the top of the valve rod passes;

[0011] The vertical pressing mechanism is used to drive the loading block to move downward in the vertical direction, so that the lower spring seat abuts against and compresses the spring, and finally the position of the lower spring seat is lower than the position of the circlip on the valve rod.

[0012] The horizontal withdrawal mechanism is used to drive the loading block to move in the horizontal direction opposite to the direction of the transverse gap, so that the loading block is separated from the lower spring seat.

[0013] Preferably, the lower spring seat installation and pressing device further comprises a lower spring seat feeding mechanism and a lower spring seat loading mechanism, the lower spring seat feeding mechanism sequentially feeds the lower spring seats to the lower spring seat loading mechanism, and the lower spring seat loading mechanism is used to push the lower spring seats into the loading cavity along the horizontal direction from the transverse gap.

[0014] Preferably, the circlip installation device comprises a circlip feeding mechanism and a circlip loading mechanism, the circlip feeding mechanism is used to sequentially feed the circlips to the upper surface of the loading block, and the circlip loading mechanism is used to push the circlips into the circlip groove on the valve rod along the horizontal direction.

[0015] Preferably, the jig moving device comprises a rotary disc arranged horizontally, the rotary disc is used to load the valve rod and stepwise rotates about the axis, and a plurality of jigs for loading the valve rod are arranged in an annular array on the rotary disc.

[0016] Preferably, the jig comprises a bearing sleeve provided with a loading hole for inserting the valve rod, and at least two locking blocks capable of moving synchronously along the radial direction of the bearing sleeve and contacting the valve rod are arranged in the bearing sleeve.

[0017] Preferably, the jig further comprises a locking driving mechanism for driving the locking blocks to move synchronously.

[0018] Preferably, when the jig moves along the preset moving track from the valve rod feeding device to the upper spring seat installation device, the locking driving mechanism drives all the locking blocks to move synchronously to lock the valve rod in the bearing sleeve.

[0019] When the jig moves along the preset moving track to the valve rod assembly unloading device, the locking driving mechanism drives all the locking blocks to move to release the valve rod.

[0020] Preferably, the jig further comprises a lifting sleeve sleeved outside the lower part of the bearing sleeve, the bearing sleeve is provided with sliding grooves for the movement of the locking blocks, the locking blocks are provided with guide inclined surfaces facing the outside of the bearing sleeve, the lifting sleeve is provided with guide blocks matched with the guide inclined surfaces, and a return spring is arranged between the top of the lifting sleeve and the lower edge of the upper end of the bearing sleeve.

[0021] When the locking driving mechanism lifts the lifting sleeve upward to compress the return spring, the guide blocks are matched with the guide inclined surfaces to make all the locking blocks move to the inside of the bearing sleeve to lock the valve rod; conversely, under the action of the return spring, the lifting sleeve moves downward, and all the locking blocks move to the outside of the bearing sleeve to release the valve rod.

[0022] Preferably, the locking driving mechanism is an annular track arranged directly below the rotating disc, the bottom of the lifting sleeve is provided with a top rod in contact with the upper surface of the annular track, and the upper surface of the annular track is divided into a first height contact surface and a second height contact surface according to different heights.

[0023] When the bottom of the top rod is in contact with the first height contact surface, the valve rod is in the locked state.

[0024] When the bottom of the top rod is in contact with the second height contact surface, the valve rod is in the released state.

[0025] Preferably, the upper surface of the annular track further has a third height contact surface, the height of the third height contact surface is lower than that of the first height contact surface and higher than that of the third height contact surface.

[0026] Beneficial effects: the lower spring seat is automatically fed and synchronously pressed by the lower spring seat installation and pressing device, the full-automatic assembly of the valve rod assembly is realized, and the technical problems of part loss and slow assembly caused by the spring easily ejecting the lower spring seat during the operation process are effectively avoided. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a sectional view of an electromagnetic valve.

[0028] Figure 2 is Figure 1 is a perspective view of a valve rod assembly in the electromagnetic valve.

[0029] Figure 3 is Figure 1 The cross-sectional structure diagram of the valve rod assembly in the electromagnetic valve.

[0030] Figure 4 The top view of the electromagnetic valve valve rod assembly assembling device of the present application.

[0031] Figure 5 The three-dimensional structure diagram of the rotating disc and the lower spring seat installation and pressing device in the electromagnetic valve valve rod assembly assembling device of the present application Figure 1 .

[0032] Figure 6 The three-dimensional structure diagram of the rotating disc and the lower spring seat installation and pressing device in the electromagnetic valve valve rod assembly assembling device of the present application Figure 2 .

[0033] Figure 7 The three-dimensional structure diagram of the lower spring seat installation and pressing device in the electromagnetic valve valve rod assembly assembling device of the present application.

[0034] Figure 8 The three-dimensional structure diagram of the lower spring seat installation and pressing device and the jig in the electromagnetic valve valve rod assembly assembling device of the present application .

[0035] Figure 9 The three-dimensional structure diagram of the lower spring seat installation and pressing device and the jig in the electromagnetic valve valve rod assembly assembling device of the present application .

[0036] Figure 10 The state diagram of the lower spring seat installation and pressing device in the electromagnetic valve valve rod assembly assembling device of the present application.

[0037] Figure 11 The state diagram of the lower spring seat installation and pressing device in the electromagnetic valve valve rod assembly assembling device of the present application.

[0038] Figure 12 The three-dimensional structure diagram of the jig in the electromagnetic valve valve rod assembly assembling device of the present application.

[0039] Figure 13 The three-dimensional structure diagram of the jig in the electromagnetic valve valve rod assembly assembling device of the present application.

[0040] The figure marks are: A, valve stem loading device; B, upper spring seat installation device; C, spring installation device; D, lower spring seat installation and pressing device; E, clamp spring installation device; F, valve stem assembly unloading device; G, jig moving device; 1, valve stem; 2, upper spring seat; 3, spring; 4, lower spring seat; 5, jig; 5a, bearing sleeve; 5b, locking block; 5b1, guide slope; 5c, lifting sleeve; 5c1, guide block; 5c2, ejector pin; 5d, return spring; 6, loading block; 6a, transverse notch; 7, vertical pressing mechanism; 8, horizontal evacuation mechanism; 9, storage box; 10, insert; 11, rotary disc; 12, annular track; 12a, first height contact surface; 12b, second height contact surface; 12c, third height contact surface; 13, clamp spring. DETAILED DESCRIPTION

[0041] In order to further understand the features, technical means and specific purposes and functions achieved by the present application, the present application will be described in further detail below in conjunction with the drawings and specific embodiments.

[0042] Referring to Figure 4 As shown in the figure, an electromagnetic valve valve stem assembly assembling device for installing a spring assembly on a valve stem 1 to form a valve stem assembly, comprising a jig 5 for loading the valve stem 1 and making the valve stem 1 in a vertical state when in a state; and a valve stem loading device A, an upper spring seat installation device B, a spring installation device C, a lower spring seat installation and pressing device D, a clamp spring installation device E, a valve stem assembly unloading device F and a jig moving device G. The valve stem loading device A is used to load the valve stem 1 into the jig 5; the upper spring seat installation device B is used to sleeve the upper spring seat 2 on the valve stem 1 in the jig 5; the spring installation device C is used to sleeve the spring 3 on the valve stem 1 in the jig 5; the lower spring seat installation and pressing device D is used to sleeve the lower spring seat 4 on the valve stem 1 in the jig 5 and press the compressed spring 3 downward and make the upper surface of the lower spring seat 4 lower than the clamp spring groove; the clamp spring installation device E is used to install the clamp spring 13 into the clamp spring groove on the valve stem 1 in the jig 5; the valve stem assembly unloading device F is used to take out the assembled valve stem assembly in the jig 5; the jig moving device G is used to drive the jig 5 to move along a predetermined moving track;

[0043] More specifically, the lower spring seat installation and pressing device D comprises a loading block 6, a vertical pressing mechanism 7 and a horizontal evacuation mechanism 8.

[0044] The loading block 6 has a loading chamber for loading the upper spring seat 2, the loading chamber has a transverse notch 6a for the upper spring seat 2 to enter and exit the loading chamber, and the loading block 6 is provided with a through hole penetrating the loading chamber and through which the top of the valve stem 1 passes.

[0045] The vertical pressing mechanism 7 is used to drive the loading block 6 to move downward in the vertical direction, so that the lower spring seat 4 abuts and compresses the spring 3, and ultimately the position of the lower spring seat 4 is lower than the position of the retaining spring 13 on the valve stem 1. More specifically, the vertical pressing mechanism 7 can be a pneumatic cylinder, an electric cylinder, or other linear actuator that drives the loading block 6.

[0046] The horizontal evacuation mechanism 8 is used to drive the loading block 6 to move in a horizontal direction opposite to the transverse notch 6a, so that the loading block 6 is separated from the lower spring seat 4. More specifically, the horizontal evacuation mechanism 8 can be a cylinder, an electric cylinder or other linear actuator that drives the loading block 6 to move.

[0047] As a specific embodiment of the valve stem feeding device A in the present invention, the valve stem feeding device A includes a valve stem 1 feeding mechanism and a valve stem 1 loading mechanism. The valve stem 1 feeding mechanism conveys the valve stems 1 one by one to the valve stem 1 loading mechanism, and the valve stem 1 loading mechanism places one valve stem 1 into the jig 5. Preferably, the valve stem 1 feeding mechanism can be composed of a vibrating plate and a feeding track with a vibrator, and the valve stem 1 loading mechanism can be composed of a mechanical arm with horizontal lateral movement and lifting movement. Since it is not the core technical point of the improved technical solution of the present invention, it will not be described here.

[0048] As a specific embodiment of the upper spring seat installation device B in the present invention, the upper spring seat installation device B includes an upper spring seat 2 feeding mechanism and an upper spring seat 2 loading mechanism. The upper spring seat 2 feeding mechanism conveys the upper spring seats 2 one by one to the upper spring seat 2 loading mechanism, and the upper spring seat 2 loading mechanism sleeves one upper spring seat 2 on the valve stem 1 in the jig 5. Preferably, the upper spring seat 2 feeding mechanism can be composed of a vibrating disk and a feeding track with a vibrator, and the upper spring seat 2 loading mechanism can be composed of a robotic arm with horizontal lateral movement and lifting movement. Since these are not the core technical points of the improved technical solution of the present invention, they will not be described in detail here.

[0049] As a specific embodiment of the spring installation device C of the present invention, the spring installation device C includes a spring 3 feeding mechanism and a spring 3 loading mechanism. The spring 3 feeding mechanism feeds springs 3 one by one to the spring 3 loading mechanism, and the spring 3 loading mechanism sleeves a spring 3 on the valve stem 1 in the fixture 5. Preferably, the spring 3 feeding mechanism can be composed of a vibrating plate and a feeding track with a vibrator, and the spring 3 loading mechanism can be composed of a mechanical arm with horizontal lateral movement and lifting movement. Since these are not the core technical points of the improved technical solution of the present invention, they will not be described in detail here.

[0050] As a specific embodiment of the valve stem assembly unloading device F in the present invention, the valve stem assembly unloading device F can be composed of a mechanical arm with horizontal lateral movement and lifting and lowering movement. Since it is not the core technical point of the improvement of the patented technical solution of the present invention, it will not be described here.

[0051] As a specific embodiment of the lower spring seat installation and pressing device D in the present application, the lower spring seat installation and pressing device D further comprises a lower spring seat 4 feeding mechanism and a lower spring seat 4 loading mechanism, the lower spring seat 4 feeding mechanism sequentially feeds the lower spring seat 4 to the lower spring seat 4 loading mechanism, and the lower spring seat 4 loading mechanism is used to push the lower spring seat 4 along the horizontal direction from the transverse gap 6a into the bearing cavity. The lower spring seat 4 feeding mechanism can be composed of a vibration disc and a feeding track with a vibrator, and the lower spring seat 4 loading mechanism can be a pushing mechanism arranged at the output end of the lower spring seat 4 feeding mechanism. The pushing mechanism can be a cylinder-driven pushing rod to push the lower spring seat 4 into the bearing cavity. Since the specific structure of the lower spring seat 4 feeding mechanism and the lower spring seat 4 loading mechanism is not the core technical point of the improvement of the patent technical solution of the present application, it will not be described here.

[0052] Referring to Figures 4 to 11 , as a specific embodiment of the spring installation device E in the present application, the spring installation device E comprises a spring 13 feeding mechanism and a spring 13 loading mechanism, the spring 13 feeding mechanism is used to sequentially feed the spring 13 to the upper surface of the loading block 6, and the spring 13 loading mechanism is used to push the spring 13 along the horizontal direction and press the spring 13 into the spring groove on the valve stem 1. More specifically, the spring 13 feeding mechanism can be a storage box 9 installed on the loading block 6, and the spring 13 is stacked in the storage box 9. The storage box 9 is arranged to make the opening of the spring 13 face the direction in which the spring 13 is pushed out from the bottom of the storage box 9 so as to facilitate the cooperation of the spring groove. The spring 13 loading mechanism can be composed of a linear driver driving a thin sheet-loaded insert 10. The insert 10 is inserted into the bottom of the storage box 9 under the driving of the linear driver to push out the lowermost spring 13 from the storage box 9 and cooperate with the spring groove.

[0053] Referring to Figures 4-6 , the jig moving device G comprises a rotary disc 11 arranged horizontally, the rotary disc 11 is used to load the valve stem 1 and stepwise rotate about its axis, and a plurality of said jigs 5 for loading the valve stem 1 are arranged in a ring array on the rotary disc 11.

[0054] Referring to Figure 4As shown, the periphery of the rotary disc 11 is provided with a first station, a second station, a third station, a fourth station and a fifth station, each jig 5 on the rotary disc 11 stays in the first station, the second station, the third station, the fourth station and the fifth station in turn and then returns to the first station, when the jig 5 moves to the first station, it cooperates with the valve stem feeding device A to feed the valve stem 1, when the jig 5 moves to the second station, it cooperates with the upper spring seat installation device B to install the upper spring seat 2, when the jig 5 moves to the third station, it cooperates with the spring installation device C to install the spring 3, when the jig 5 moves to the fourth station, it cooperates with the lower spring seat installation and pressing device D and the clamp spring installation device E to install the lower spring seat 4 and the clamp spring 13, when the jig 5 moves to the fifth station, it cooperates with the valve stem assembly unloading device F to unload the valve stem assembly as a whole.

[0055] Referring to Figure 4 , Figure 9 , Figure 12 and Figure 13 , the jig 5 comprises a bearing sleeve 5a provided with a loading hole for inserting the valve stem 1, and at least two locking blocks 5b capable of moving synchronously along the radial direction of the bearing sleeve 5a and contacting the valve stem 1 are arranged in the bearing sleeve 5a.

[0056] Referring to Figure 4 , Figure 5 and Figure 6 , the jig 5 further comprises a locking driving mechanism for driving the synchronous action of the locking blocks 5b.

[0057] When the jig 5 moves from the valve stem feeding device A to the upper spring seat installation device B along the preset movement track, the locking driving mechanism drives all the locking blocks 5b to act synchronously to lock the valve stem 1 in the bearing sleeve 5a; when the jig 5 moves to the valve stem assembly unloading device F along the preset movement track, the locking driving mechanism drives all the locking blocks 5b to act to release the valve stem 1.

[0058] Referring to Figure 6 , Figure 9 , Figure 12 and Figure 13As shown, the tool 5 further comprises a lifting sleeve 5c sleeved outside the bearing sleeve 5a, the bearing sleeve 5a is provided with sliding grooves for the movement of the locking blocks 5b, the locking blocks 5b are provided with guide slopes 5b1 facing the outside of the bearing sleeve 5a, the lifting sleeve 5c is provided with guide blocks 5c1 matched with the guide slopes 5b1, and a return spring 5d is arranged between the top of the lifting sleeve 5c and the lower edge of the upper end of the bearing sleeve 5a; when the locking driving mechanism lifts the lifting sleeve 5c upward to compress the return spring 5d, the guide blocks 5c1 are matched with the guide slopes 5b1 to make all the locking blocks 5b move to the inside of the bearing sleeve 5a to realize the locking of the valve stem 1; on the contrary, the lifting sleeve 5c moves downward under the action of the return spring 5d, and all the locking blocks 5b move to the outside of the bearing sleeve 5a to realize the release of the valve stem 1.

[0059] Referring to Figure 6 As shown, the locking driving mechanism is an annular track 12 arranged directly below the rotary disc 11, the bottom of the lifting sleeve 5c is provided with a top rod 5c2 in contact with the upper surface of the annular track 12, and the upper surface of the annular track 12 is divided into a first height contact surface 12a and a second height contact surface 12b according to different heights; when the bottom of the top rod 5c2 is in contact with the first height contact surface 12a, the valve stem 1 is in the locked state; when the bottom of the top rod 5c2 is in contact with the second height contact surface 12b, the valve stem 1 is in the released state.

[0060] Referring to Figure 6 As shown, the upper surface of the annular track 12 further has a third height contact surface 12c, the height of the third height contact surface 12c is lower than that of the first height contact surface 12a and higher than that of the third height contact surface 12c. When the bottom of the top rod 5c2 is in contact with the second height contact surface 12b, the locking blocks 5b move radially inwardly to the innermost side, so as to facilitate the insertion of the valve stem 1 into the bearing sleeve 5a and prevent the valve stem 1 from being inclined at a large angle. When the bottom of the top rod 5c2 is in contact with the third height contact surface 12c under the movement of the tool 5 driven by the rotary disc 11, the locking blocks 5b move radially to the innermost side, and at this time, the valve stem 1 is locked and in an absolutely vertical state, so as to facilitate the assembly and alignment of other components.

[0061] Preferably, the bottom of the top rod 5c2 is specifically adjustable, so as to control the inward movement distance of the locking blocks 5b when the bottom of the top rod 5c2 is in contact with the second height contact surface 12b, and specifically, a relatively accurate clamping force for the valve stem 1 is obtained.

[0062] More preferably, the bottom of the top rod 5c2 is provided with a roller or a ball in contact with the upper surface of the annular track 12, so as to ensure the smooth contact between the top rod 5c2 and the upper surface of the annular track 12.

[0063] The above embodiments only express one or several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A solenoid valve stem assembly assembly device for mounting a spring assembly on a valve stem (1) to form a valve stem (1) assembly, characterized in that: It comprises a jig (5) for loading the valve stem (1) and making the valve stem (1) in a vertical state when in a state; and A valve stem loading device (A) for loading the valve stem (1) into the jig (5); An upper spring seat mounting device (B) is used to sleeve the upper spring seat (2) onto the valve stem (1) in the fixture (5); A spring mounting device (C) for sleeve-mounting the spring (3) on the valve stem (1) in the fixture (5); A lower spring seat installation and pressing device (D) is used to sleeve the lower spring seat (4) on the valve stem (1) in the fixture (5) and press the compression spring (3) downward so that the upper surface of the lower spring seat (4) is lower than the retaining spring groove; A retaining spring mounting device (E) for mounting the retaining spring (13) into a retaining spring groove on the valve stem (1) in the fixture (5); A valve stem assembly unloading device (F) is used to remove the valve stem (1) assembly assembled in the jig (5); A fixture moving device (G), used for driving the fixture (5) to move along a preset moving trajectory; The lower spring seat installation and pressing device (D) includes: A loading block (6) has a loading chamber for loading the upper spring seat (2), the loading chamber having a transverse notch (6a) for the upper spring seat (2) to enter and exit the loading chamber, and the loading block (6) is provided with a through hole that passes through the loading chamber and for the top of the valve stem (1) to pass through; A vertical downward pressing mechanism (7) is used to drive the loading block (6) to move downward in the vertical direction, so that the lower spring seat (4) abuts against and compresses the spring (3), and finally the position of the lower spring seat (4) is lower than the position of the retaining ring groove on the valve stem (1); A horizontal evacuation mechanism (8) is used to drive the loading block (6) to move in a horizontal direction opposite to the transverse notch (6a), so that the loading block (6) is separated from the lower spring seat (4); The fixture moving device (G) includes a horizontally arranged rotary disk (11), the rotary disk (11) is used to load the valve stem (1) and its axis rotates in a step-by-step manner, and a plurality of fixtures (5) for loading the valve stem (1) are arranged in a circular array on the rotary disk (11); The jig (5) comprises a bearing sleeve (5a), the bearing sleeve (5a) being provided with a loading hole for inserting the valve stem (1), and at least two locking blocks (5b) being provided in the bearing sleeve (5a) and capable of synchronously moving along the radial direction of the bearing sleeve (5a) and contacting the valve stem (1); The fixture (5) further comprises a locking drive mechanism for driving the locking block (5b) to move synchronously; When the fixture (5) moves along a preset moving trajectory from the valve stem loading device (A) toward the upper spring seat mounting device (B), the locking drive mechanism drives all locking blocks (5b) to move synchronously to lock the valve stem (1) in the bearing sleeve (5a); When the jig (5) moves along a preset trajectory to the valve stem assembly unloading device (F), the locking drive mechanism drives all locking blocks (5b) to release the valve stem (1).

2. The solenoid valve stem assembly assembly device according to claim 1, characterized in that: The lower spring seat installation and pressing device (D) further includes a lower spring seat (4) feeding mechanism and a lower spring seat (4) loading mechanism. The lower spring seat (4) feeding mechanism conveys the lower spring seats (4) one by one to the lower spring seat (4) loading mechanism. The lower spring seat (4) loading mechanism is used to push the lower spring seat (4) from the transverse notch (6a) into the bearing bin along the horizontal direction.

3. The solenoid valve stem assembly assembly device according to claim 1, characterized in that: The retaining spring installation device (E) includes a retaining spring (13) feeding mechanism and a retaining spring (13) loading mechanism. The retaining spring (13) feeding mechanism is used to deliver the retaining springs (13) one by one to the upper surface of the loading block (6). The retaining spring (13) loading mechanism is used to push the retaining springs (13) in a horizontal direction and press the retaining springs (13) into the retaining spring groove on the valve stem (1).

4. The solenoid valve stem assembly assembly device according to claim 1, characterized in that: The jig (5) further comprises a lifting sleeve (5c) sleeved on the outside below the bearing sleeve (5a); the bearing sleeve (5a) is provided with a sliding groove for the locking block (5b) to move; the locking block (5b) is provided with a guide inclined surface (5b1) facing the bearing to the outside; the lifting sleeve (5c) is provided with a guide block (5c1) matched with the guide inclined surface (5b1); and a return spring (5d) is provided between the top of the lifting sleeve (5c) and the lower edge of the upper end of the bearing sleeve (5a); When the locking drive mechanism lifts the lifting sleeve (5c) upward to compress the return spring (5d), the guide block (5c1) cooperates with the guide bevel (5b1) to make all the locking blocks (5b) move toward the inner side of the bearing sleeve (5a) to lock the valve stem (1); conversely, under the action of the return spring (5d), the lifting sleeve (5c) moves downward, and all the locking blocks (5b) move toward the outer side of the bearing sleeve (5a) to release the valve stem (1).

5. The solenoid valve stem assembly assembly device according to claim 4, characterized in that: The locking drive mechanism is an annular track (12) arranged directly below the rotary disk (11); a top rod (5c2) in contact with the upper surface of the annular track (12) is provided at the bottom of the lifting sleeve (5c); the upper surface of the annular track (12) is divided into a first height contact surface (12a) and a second height contact surface (12b) according to different heights; When the bottom of the push rod (5c2) contacts the first height contact surface (12a), the valve stem (1) is in a locked state; When the bottom of the push rod (5c2) contacts the second height contact surface (12b), the valve stem (1) is in a released state.

6. The solenoid valve stem assembly assembly device according to claim 5, characterized in that: The upper surface of the annular track (12) further comprises a third height contact surface (12c), the height of the third height contact surface (12c) being lower than the first height contact surface (12a) and higher than the third height contact surface (12c).

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