Static iron core assembling device

Abstract

The invention relates to the field of workpiece assembling, in particular to a static iron core assembling device which comprises an electric rotating clamping jaw for clamping and rotating a static iron core, a vertical moving air cylinder for driving the electric rotating clamping jaw to be close to or away from a valve body and a clamp for clamping and fixing the valve body. The clamp comprises a base, a valve body clamping jaw, a following rotating block, a pressure sensor and a pressure measuring spring, wherein the valve body clamping jaw is rotationally connected to the base around the rotating axis of the static iron core and clamps and fixes the valve body; the following rotating block is fixedly connected to the valve body clamping jaw; the pressure sensor is located outside the base; the vertical moving air cylinder, the pressure sensor and the electric rotating clamping jaw are all electrically connected with a controller. When a pressure value detected by the pressure sensor is equal to a preset pressure threshold value in the controller, the electric rotary clamping jaw stops rotation of the static iron core, so that the static iron core and the valve body are fixedly connected, excessive pressure is not prone to occurring, and the assembling quality of the static iron core is ensured.

Description

Technical Field

[0001] The present application relates to the field of workpiece assembly, and in particular to a static iron core assembly device. Background Art

[0002] The solenoid valve generally switches the valve body by moving the moving iron core closer to or away from the static iron core. The static iron core needs to be firmly fixed in place and tightly fixed in the valve body. At the same time, in order to improve the production efficiency of the solenoid valve, a device that can automatically assemble the solenoid valve is required.

[0003] For example, there is an automatic assembly device for a solenoid valve with publication number CN114178843A, in which a static iron core is clamped by a rotating clamp and then screwed into a valve body.

[0004] With respect to the above-mentioned related technologies, the rotating jaws will move the static iron core down a predetermined path according to a predetermined procedure and then start to rotate synchronously. The number of rotations is fixed. However, the threaded sections of the static iron core and the valve body cannot be smoothly threadedly connected when the static iron core starts to rotate. As a result, after the static iron core rotates a certain number of times, the static iron core and the valve body are easily not tightly connected, resulting in low assembly quality of the static iron core. Summary of the invention

[0005] In order to improve the assembly quality of a static iron core, the present application provides a static iron core assembly device.

[0006] The present application provides a static iron core assembly device that adopts the following technical solution.

[0007] A static iron core assembly device comprises an electric rotating jaw for clamping and rotating the static iron core, a vertical movement cylinder for driving the electric rotating jaw to approach or move away from a valve body, and a clamp for clamping and fixing the valve body, the clamp comprising a base, a valve body clamp connected to the base and rotating around a rotation axis of the static iron core and clamping and fixing the valve body, a follow-up block fixedly connected to the valve body clamp, a pressure sensor located outside the base, a pressure measuring spring provided between the pressure sensor and the follow-up block to force the follow-up block to move away from the pressure sensor, the vertical movement cylinder, the pressure sensor and the electric rotating jaw are all electrically connected to a controller; when the pressure value detected by the pressure sensor is equal to a preset pressure threshold in the controller, the electric rotating jaw stops the rotation of the static iron core.

[0008] By adopting the above technical solution, when the pressure value detected by the pressure sensor reaches the preset pressure threshold, it indicates that the stationary iron core and the valve seat have been fastened together, and it is not easy for the stationary iron core to be over-tightened on the valve seat, so that the assembly quality of the stationary iron core is improved to a certain extent, and the quality of each solenoid valve is also more consistent.

[0009] Optionally, a pressure regulating block is slidably connected to the base around the rotation axis of the valve body clamp, the pressure sensor is detachably connected to the pressure regulating block, and the base is provided with a rotating cylinder that enables the pressure regulating block to slide.

[0010] By adopting the above technical solution, the movement of the pressure regulating block can change the minimum pressure value applied to the pressure sensor by the pressure measuring spring, so that when different pressure thresholds are required during the assembly process between different static iron cores and valve bodies, a smaller or larger pressure threshold can be set according to needs.

[0011] Optionally, the vertical cylinder power rod is detachably connected to a cylinder rod block, the cylinder rod block is plugged with a sleeve detachably connected to an electric rotating clamp, the sleeve is fixedly connected to a spring block slidably connected to the cylinder rod block along the moving direction of the vertical cylinder power rod, and two compression springs are provided in the cylinder rod block whose length direction is consistent with the moving direction of the spring block, and the spring block is located between the two compression springs; the compression amount of the two medium and high compression springs after the vertical cylinder power rod is completed extended is greater than the compression amount of the low height compression springs, and the compression amount of the two medium and high compression springs after the static iron core and the valve body are connected is less than the compression amount of the low height compression springs.

[0012] By adopting the above technical solution, the elongation of the vertical cylinder power rod is not likely to have a significant impact on the connection quality between the static iron core and the valve body. Even if there is a certain deviation between the height of the valve body and the static iron core and the expected value, they can be assembled stably, which helps to improve the assembly quality between the valve body and the static iron core.

[0013] Optionally, the cylinder rod block is detachably connected to a distance sensor for detecting the position of the sleeve relative to the cylinder rod block, and the distance sensor is electrically connected to the controller; when the distance value detected by the distance sensor exceeds a preset distance range in the controller, the vertical movement cylinder and the electric rotary clamp stop operating.

[0014] By adopting the above technical solution, the sleeve is prevented from excessively moving relative to the cylinder rod block, so that the compression spring is not easily damaged, and it also helps to ensure the normal assembly between the static iron core and the valve body.

[0015] Optionally, when the pressure value detected by the pressure sensor is less than a preset pressure threshold within a preset time period, the electric rotating clamp stops running and is overhauled.

[0016] By adopting the above technical scheme, during the process in which the electric rotating jaws clamp the static iron core for a long time and rotate so that the static iron core is screwed onto the valve body, the friction force at the position where the electric rotating jaws clamp the static iron core decreases, which makes it easy for the electric rotating jaws to have difficulty in screwing the static iron core onto the valve body. By means of pressure testing within a certain period of time, it can be known whether the electric rotating jaws slip during the process of screwing the static iron core into the valve body. While ensuring the assembly quality between the static iron core and the valve body, the slipping electric rotating jaws can be inspected and repaired in time to ensure assembly efficiency.

[0017] Optionally, the cylinder rod block includes a fixed block detachably connected to the vertical cylinder power rod and a movable block rotatably connected to the fixed block, the fixed block is provided with a jaw changing motor for rotating the movable block, and the sleeve is provided with at least two electric rotating jaws.

[0018] By adopting the above technical solution, the electric rotating clamp can be replaced in time when it slips, so as to reduce the impact on normal assembly work.

[0019] Optionally, the electric rotating clamp includes a clamp body for clamping the static iron core and a mounting block detachably connected to the clamp body, the mounting block is inserted into the sleeve radially along the sleeve, there is a fixed vertical rod around the sleeve, the vertical rod is detachably connected to a disassembly cylinder, and the disassembly cylinder power rod is detachably connected to a pneumatic finger that clamps the mounting block.

[0020] By adopting the above technical scheme, after the moving block rotates to complete the replacement of the electric rotating clamp, when the normal electric rotating clamp completes the screwing-in work of a static iron core and a valve body, the vertical cylinder power rod rises to a predetermined initial height to wait for the next static iron core and valve body to move into place. The disassembly cylinder drives the pneumatic fingers close to the mounting block so that the pneumatic fingers can clamp the mounting block and remove it from the sleeve. The problematic electric rotating clamp is then removed from the pneumatic fingers for inspection and maintenance, and the mounting block is placed corresponding to the pneumatic fingers. When the vertical cylinder power rod rises to the initial height, the pneumatic fingers can install the inspected electric rotating clamp corresponding to the sleeve, so as to minimize the impact of the inspection work of the electric rotating clamp on the normal assembly work.

[0021] Optionally, two vertical poles are provided, each vertical pole is provided with a disassembly cylinder and a pneumatic finger, and the sleeve is located between the two vertical poles.

[0022] By adopting the above technical solution, the removal and installation work of the electric rotating jaws corresponding to the two positions on the sleeve can be better adapted, so that the maintenance work of the electric rotating jaws corresponding to the two positions on the sleeve after being used for a certain period of time will not easily affect the normal assembly work.

[0023] Optionally, an anti-slip block that can be inserted into the mounting block is slidably connected in the sleeve, and a block spring is provided in the sleeve to force the anti-slip block to be tightly inserted into the mounting block. The surfaces on both sides of the anti-slip block are inclined so that when the mounting block moves radially along the sleeve, it can push the anti-slip block to move to compress the block spring.

[0024] By adopting the above technical solution, while the mounting block can be clamped by the pneumatic fingers and separated from the sleeve, the mounting block is not easy to move at will in the sleeve, thereby ensuring the stability of the mounting block.

[0025] Optionally, the vertical pole is fixedly connected to two receiving plates, the mounting block can be placed on the upper surface of one end of the two receiving plates, and the clamp body can pass through the space between the ends of the two receiving plates.

[0026] By adopting the above technical solution, the clamp body can be temporarily supported, so that the electric rotating clamp can be directly taken for inspection and maintenance when personnel are free.

[0027] In summary, the present application includes at least the following beneficial effects.

[0028] When the pressure value detected by the pressure sensor reaches the preset pressure threshold, it indicates that the static iron core and the valve seat have been tightened, which also makes it difficult for the static iron core to be over-tightened on the valve seat, so that the assembly quality of the static iron core is improved to a certain extent, and the quality of each solenoid valve is also more consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure of this application; Figure 2 It is the system block diagram of the control part of this application; Figure 3 It is a structural schematic diagram showing the vicinity of a cylinder rod block, a sleeve and a vertical rod, with the sleeve partially cut away.

[0030] Explanation of the reference numerals in the accompanying drawings: 1. Electric rotating jaw; 2. Vertical moving cylinder; 21. Disassembly cylinder; 22. Pneumatic finger; 23. Anti-slip block; 24. Block spring; 25. Adapter plate; 26. Workbench; 3. Clamp; 31. Spring block; 32. Compression spring; 33. Distance sensor; 34. Fixed block; 35. Moving block; 36. Jaw changing motor; 37. Jaw body; 38. Mounting block; 39. Vertical pole; 4. Base; 41. Valve body jaw; 42. Follow-up block; 43. Pressure sensor; 44. Pressure measuring spring; 45. Controller; 46. Pressure regulating block; 47. Rotating cylinder; 48. Cylinder rod block; 49. Sleeve. DETAILED DESCRIPTION

[0031] The present application is further described in detail below in conjunction with the accompanying drawings.

[0032] The present application embodiment discloses a static iron core assembly device, referring to Figure 1 , including a workbench 26, on the upper surface of which are mounted a fixture 3 for clamping and fixing the valve body and a vertical cylinder 2 with a vertical power rod; above the workbench 26 is mounted an electric rotating jaw 1 for clamping the static iron core, which can move synchronously with the power rod of the vertical cylinder 2.

[0033] Reference Figure 1 and Figure 2 The clamp 3 includes a base 4 detachably connected to the workbench 26. The base 4 is rotatably connected to a valve body clamp 41 whose rotation axis is consistent with the axis of rotation of the static iron core driven by the electric rotating clamp 1. The valve body clamp 41 clamps the valve body. A follow-up block 42 is fixedly connected to the periphery of the valve body clamp 41. A pressure sensor 43 is present on the outside of the base 4. A pressure measuring spring 44 is installed between the pressure sensor 43 and the follow-up block 42. An arc-shaped telescopic rod for the pressure measuring spring 44 to be mounted is detachably connected between the pressure sensor 43 and the follow-up block 42, so that the pressure measuring spring 44 can stably force the follow-up block 42 away from the pressure sensor 43. The vertical cylinder 2, the pressure sensor 43 and the electric rotating clamp 1 are electrically connected to a controller 45. When the pressure value detected by the pressure sensor 43 is equal to the preset pressure threshold in the controller 45, the fastening force between the static iron core and the valve body has reached the standard value, and the electric rotating clamp 1 stops the rotation of the static iron core.

[0034] Reference Figure 1 The outer surface of the base 4 is slidably connected to the pressure regulating block 46 around the rotation axis of the valve body clamp 41. The pressure regulating block 46 is detachably connected to the pressure sensor 43. The base 4 is detachably connected to a rotating cylinder 47 whose rotating shaft is detachably connected to the pressure regulating block 46. The position of the pressure regulating block 46 is changed to adjust the pressure threshold preset in the controller 45 within a wider range.

[0035] Reference Figure 1 and Figure 3The bottom end of the power rod of the vertical cylinder 2 is detachably connected to a cylinder rod block 48. The cylinder rod block 48 includes a fixed block 34 connected to the power rod of the vertical cylinder 2 and a movable block 35 connected to the fixed block 34. The movable block 35 is plugged and slidably connected to a sleeve 49 in the vertical direction. The bottom end of the sleeve 49 is connected to the electric rotating clamp 1. The inner wall of the upper end of the sleeve 49 is fixedly connected to a spring block 31. The spring block 31 is slidably connected to the outer wall of the circumference of the movable block 35 in the vertical direction. Two compression springs 32 are detachably connected in the groove of the movable block 35 for the spring block 31 to slide. The compression spring 32 forces the objects at both ends of itself to move away from each other. The spring block 31 is located between the two compression springs 32. After the power rod of the vertical cylinder 2 moves down a predetermined distance from the initial height, the static iron core abuts against the corresponding threaded hole opening of the valve body. At this time, the compression amount of the high-height compression spring 32 is greater than the compression amount of the low-height compression spring 32. After the static iron core is screwed in, the compression amount of the high compression spring 32 is less than the compression amount of the low compression spring 32, so that the change in the downward movement height of the power rod of the vertical cylinder 2 within a certain range or the change in the initial height position of the static iron core and the valve body will not easily cause a decrease in the assembly quality between the static iron core and the valve body.

[0036] Reference Figure 2 and Figure 3 The fixed block 34 is detachably connected with a distance sensor 33 which is opposite to the moving block 35 and electrically connected to the controller 45. When the distance value detected by the distance sensor 33 exceeds the distance range preset in the controller 45, that is, the sleeve 49 moves excessively with respect to the moving block 35 and a compression spring 32 is over-compressed, the vertical cylinder 2 and the electric rotating clamp 1 stop running, and the relevant personnel shall promptly check and repair them.

[0037] Reference Figure 3The movable block 35 is connected to the fixed block 34 by rotating around the vertical axis of the sleeve 49. The fixed block 34 is detachably connected to a claw changing motor 36 that drives the movable block 35 to rotate through a gear set. The claw changing motor 36 is electrically connected to the controller 45. At least two electric rotating jaws 1 are arranged around the axis of the sleeve 49. This embodiment is described by taking two electric rotating jaws 1 as an example. Each electric rotating jaw 1 includes a jaw body 37 that clamps the static iron core and a mounting block 38 that is detachably connected to the upper part of the jaw body 37. The mounting block 38 is inserted into the sleeve 49 along the radial direction of the sleeve 49. The directions in which the two mounting blocks 38 are inserted into the sleeve 49 can be perpendicular. The workbench 26 is detachably connected to two vertical poles 39, and a disassembly cylinder 21 with a horizontal power rod is detachably connected to the upper part of each pole 39. The power rod of the disassembly cylinder 21 is detachably connected to a pneumatic finger 22 capable of clamping the two vertical surfaces of the mounting block 38. The disassembly cylinder 21 and the pneumatic finger 22 are electrically connected to the controller 45. Each pole 39 is fixedly connected to a group of two receiving plates 25, and the upper surfaces of the two receiving plates 25 at the adjacent ends of the same group are used for the lower surface of the mounting block 38 to be placed, and the space between the adjacent ends of the two receiving plates 25 in the same group is large enough for the clamp body 37 to enter.

[0038] When the pressure value detected by the pressure sensor 43 is less than the preset pressure threshold within the preset time period, that is, slippage occurs between the electric rotating clamp 1 and the static iron core, and the static iron core cannot be tightened to the valve body, the electric rotating clamp 1 stops running, and the jaw changing motor 36 runs to rotate the movable block 35 and the sleeve 49 by 90 degrees, and the new electric rotating clamp 1 clamps the static iron core and rotates to complete the tightening, and then the power rod of the vertical moving cylinder 2 moves up to the initial height, and at this time, the installation block 38 of the slipped electric rotating clamp 1 will be aligned with a pneumatic finger 22, and the corresponding disassembly cylinder 21 The power rod is extended so that the pneumatic finger 22 can clamp the corresponding mounting block 38, and then the power rod of the cylinder 21 is removed and reset, so that the slipping electric rotary clamp 1 is removed and placed on the receiving plate 25. When the corresponding personnel are free, the electric rotary clamp 1 is removed and the repaired electric rotary clamp 1 is positioned and placed on the receiving plate 25 after the inspection. After the static iron core and the valve body being assembled are completed and the power rod of the vertical cylinder 2 rises to the initial height again, the cylinder 21 is removed and cooperated with the pneumatic finger to install the corresponding sleeve 49 of the repaired electric rotary clamp 1.

[0039] Reference Figure 3 An anti-slip block 23 is slidably connected in the vertical direction in the groove on the outer surface of the sleeve 49. The anti-slip block 23 can be inserted into the upper surface of the mounting block 38. The sleeve 49 is detachably connected with a block spring 24 for forcing the anti-slip block 23 to move downward. The bottom of the anti-slip block 23 is formed into an inclined surface relative to the bottom of the two side surfaces, so that when the mounting block 38 moves radially along the sleeve 49, the anti-slip block 23 can be forced to move upward, so that the anti-slip block 23 can be smoothly inserted into or detached from the mounting block 38.

[0040] The implementation principle of a static iron core assembly device in an embodiment of the present application is as follows: after the electric rotating jaw 1 clamps the static iron core, the power rod of the vertical moving cylinder 2 moves down a predetermined distance so that the static iron core is pressed against the corresponding threaded hole opening of the valve body, and then the electric rotating jaw 1 drives the static iron core to rotate so that the static iron core is threadedly connected to the valve body, until the static iron core is tightened to the valve body so that the pressure value detected by the pressure sensor 43 is equal to the preset pressure threshold in the controller 45, the electric rotating jaw 1 releases the static iron core and the power rod of the vertical moving cylinder 2 is reset to the initial height, waiting for the next static iron core and the next valve body to be placed in place for new assembly work.

[0041] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A static iron core assembly device, comprising an electric rotating clamp (1) for clamping and rotating the static iron core, a vertical movement cylinder (2) for driving the electric rotating clamp (1) to move closer to or away from a valve body, and a clamp (3) for clamping and fixing the valve body, characterized in that: The clamp (3) comprises a base (4), a valve body clamp (41) which is connected to the base (4) and rotates around a rotation axis of a stationary iron core and clamps and fixes the valve body, a follow-rotating block (42) which is fixedly connected to the valve body clamp (41), a pressure sensor (43) located outside the base (4), and a pressure measuring spring (44) which is arranged between the pressure sensor (43) and the follow-rotating block (42) to force the follow-rotating block (42) to move away from the pressure sensor (43). The vertical displacement cylinder (2), the pressure sensor (43) and the electric rotating clamp (1) are all electrically connected to a controller (45); when the pressure value detected by the pressure sensor (43) is equal to a preset pressure threshold in the controller (45), the electric rotating clamp (1) stops the rotation of the stationary iron core.

2. A static iron core assembly device according to claim 1, characterized in that: A pressure regulating block (46) is slidably connected to the base (4) around the rotation axis of the valve body clamp (41); the pressure sensor (43) is detachably connected to the pressure regulating block (46); and the base (4) is provided with a rotating cylinder (47) that enables the pressure regulating block (46) to slide.

3. The static iron core assembly device according to claim 1, characterized in that: The power rod of the vertical cylinder (2) is detachably connected to a cylinder rod block (48), and the cylinder rod block (48) is plugged with a sleeve (49) detachably connected to the electric rotating clamp (1). The sleeve (49) is fixedly connected to a spring block (31) that is slidably connected to the cylinder rod block (48) along the moving direction of the power rod of the vertical cylinder (2). Two compression springs (32) whose length direction is consistent with the moving direction of the spring block (31) are arranged in the cylinder rod block (48), and the spring block (31) is located between the two compression springs (32); the compression amount of the two middle-height compression springs (32) after the power rod of the vertical cylinder (2) is extended is greater than the compression amount of the short-height compression spring (32), and the compression amount of the two middle-height compression springs (32) after the static iron core and the valve body are connected is less than the compression amount of the short-height compression spring (32).

4. A static iron core assembly device according to claim 3, characterized in that: The cylinder rod block (48) is detachably connected to a distance sensor (33) for detecting the position of the sleeve (49) relative to the cylinder rod block (48), and the distance sensor (33) is electrically connected to the controller (45); when the distance value detected by the distance sensor (33) exceeds a distance range preset in the controller (45), the vertical movement cylinder (2) and the electric rotary clamp (1) stop operating.

5. The static iron core assembly device according to claim 3, characterized in that: When the pressure value detected by the pressure sensor (43) is less than a preset pressure threshold within a preset time period, the electric rotary clamp (1) stops running and is overhauled.

6. A static iron core assembly device according to claim 5, characterized in that: The cylinder rod block (48) comprises a fixed block (34) detachably connected to the power rod of the vertical movement cylinder (2) and a movable block (35) rotatably connected to the fixed block (34); the fixed block (34) is provided with a jaw changing motor (36) for rotating the movable block (35); and the sleeve (49) is provided with at least two electric rotating jaws (1).

7. The static iron core assembly device according to claim 6, characterized in that: The electric rotary clamp (1) comprises a clamp body (37) for clamping a static iron core and a mounting block (38) detachably connected to the clamp body (37); the mounting block (38) is inserted into the sleeve (49) along the radial direction of the sleeve (49); a vertical rod (39) with a fixed position is provided around the sleeve (49); the vertical rod (39) is detachably connected to a disassembly cylinder (21); and a power rod of the disassembly cylinder (21) is detachably connected to a pneumatic finger (22) for clamping the mounting block (38).

8. The static iron core assembly device according to claim 7, characterized in that: Two vertical rods (39) are provided, each vertical rod (39) is provided with a disassembly cylinder (21) and a pneumatic finger (22), and the sleeve (49) is located between the two vertical rods (39).

9. The static iron core assembly device according to claim 7, characterized in that: An anti-slip block (23) capable of being plugged into the mounting block (38) is slidably connected in the sleeve (49), and a block spring (24) for forcing the anti-slip block (23) to be tightly plugged into the mounting block (38) is provided in the sleeve (49). The anti-slip block (23) has two opposite side surfaces arranged in an inclined manner so that when the mounting block (38) moves radially along the sleeve (49), the anti-slip block (23) can be pushed to move so as to compress the block spring (24).

10. The static iron core assembly device according to claim 7, characterized in that: The vertical rod (39) is fixedly connected to two receiving plates (25), the mounting block (38) can be placed on the upper surface of one end of the two receiving plates (25), and the clamp body (37) can pass through the space between the ends of the two receiving plates (25).

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