A pilot valve forming device for machining a reversing valve

Abstract

The present invention relates to the field of pilot valve processing technology, and specifically to a pilot valve forming device for processing a reversing valve, comprising a pilot valve and two capillaries, and also comprising a fixed platform, a valve body clamping mechanism being provided on the fixed platform, slides being provided on both sides of the fixed platform, each slide being connected to a locking member, each slide being provided with a bending assembly, each bending assembly comprising a rotating arm, a forming wheel and a telescopic tube pressing mechanism, the telescopic tube pressing mechanism comprising a strip pressure block and a slider, a semicircular groove being provided on the strip pressure block for embedding the capillaries, a driving mechanism being provided between the strip pressure block and the rotating arm for driving the strip pressure block to move laterally. While the rotating arm rotates to drive the strip pressure block to bend the capillaries, the strip pressure block will slide in the opposite direction of the rotation of the rotating arm through the cooperation of the rack, the first gear, the second gear and the gear ring, thereby preventing the strip pressure block from breaking the capillaries as it rotates with the rotating arm.

Description

Technical Field

[0001] The invention relates to the technical field of pilot valve processing, in particular to a pilot valve forming device for processing a reversing valve. Background Art

[0002] A pilot valve is typically a small directional control valve that receives an external control signal (such as electromagnetic force or hydraulic pressure) to change the position of its valve core, thereby controlling the flow of a small amount of control fluid. This control fluid then acts on the main valve core, pushing it to move and switching the direction of the main oil circuit. For example, in an electro-hydraulic directional control valve, the solenoid pilot valve first operates in response to the electromagnetic signal, directing the control fluid into different chambers of the main valve core. This in turn pushes the main valve core to shift position, switching the high-flow main oil circuit.

[0003] The existing Chinese patent with publication number CN104815882B discloses a pilot valve forming device for machining a reversing valve, but the above patent also has the following defects:

[0004] First, the capillary tube on the pilot valve is used to connect to the reversing valve. In actual use, different shapes of reversing valves will result in different bending points of the capillary tube. That is, some capillaries on the same pilot valve may bend at the head, while others may bend in the middle. The above patent cannot adjust the bending point of the capillary tube. Ultimately, the formed capillary tube is only suitable for a specific reversing valve, narrowing its scope of use.

[0005] Secondly, the above patent drives the forming wheel through the forming block to extrude and bend the capillary. Since the guide valve body is in a fixed state, the capillary will not be displaced. Then, when the forming wheel presses the capillary, although the forming wheel can roll on the capillary, the contact area between the forming wheel and the capillary is small. Therefore, when bending, the capillary may be pressed and deformed by the forming wheel.

[0006] Therefore, it is necessary to provide a pilot valve forming device for machining a reversing valve to solve the above problems. Summary of the Invention

[0007] Based on this, it is necessary to provide a guide valve forming device for processing a reversing valve in response to the existing technical problems.

[0008] In order to solve the existing technical problems, the technical solution adopted by the present invention is: a pilot valve forming device for processing a reversing valve, comprising a pilot valve and two capillaries symmetrically connected to the pilot valve, and each capillary is horizontal, and further comprising a fixed platform, a valve body clamping mechanism is provided on the fixed platform, slides are provided on both sides of the fixed platform for sliding in the horizontal direction, each slide is connected to a locking piece, and each slide is provided with a bending assembly, two groups of bending assemblies respectively corresponding to the two capillaries, each group of bending assemblies comprises a rotating arm, a forming wheel and a telescopic pipe pressing mechanism, the rotating arm is horizontally connected to the slide for rotation, The forming wheel is rotatably connected to the rotating arm, and the axial direction of the forming wheel is vertical. The telescopic pressing tube mechanism is arranged on the rotating arm. The telescopic pressing tube mechanism includes a strip pressing block and a slider. The slider is slidably connected to the rotating arm. The sliding direction of the slider is consistent with the length direction of the rotating arm. The strip pressing block is horizontally slidably connected to the slider. The strip pressing block is located between the forming wheel and the slider. The sliding direction of the strip pressing block is horizontal, and the sliding direction of the strip pressing block is perpendicular to the sliding direction of the slider. A semicircular groove for embedding the capillary is provided on the strip pressing block. A driving mechanism for driving the strip pressing block to move horizontally is provided between the strip pressing block and the rotating arm.

[0009] Furthermore, each slide is provided with a vertical rotating shaft, one end of each rotating arm is fixedly connected to the rotating shaft, each forming wheel is arranged above the rotating arm, each forming wheel is coaxially embedded with a bearing, and each bearing is coaxially sleeved on the upper end of the corresponding rotating shaft.

[0010] Furthermore, each driving structure includes a rack, a No. 1 gear, a No. 2 gear and a ring gear. A circle ring is formed on the top of each slide, and the circle ring is coaxially sleeved on the outside of the corresponding rotating shaft. The ring gear is coaxially connected to the corresponding circle ring, and the ring gear is located between the rotating arm and the slide. The No. 1 gear and the No. 2 gear are both rotatably connected to the bottom of the rotating arm, and the No. 1 gear is meshed with the ring gear, and the No. 2 gear is meshed with the No. 1 gear. A support bar is formed at one end of each strip-shaped pressure block, and the length direction of the support bar is consistent with the length direction of the rotating arm. A connecting bar is fixed on the support bar, and the rack is horizontally connected to the connecting bar, the rack is meshed with the No. 2 gear, and the rack is parallel to the corresponding strip-shaped pressure block.

[0011] Furthermore, each rotating arm has several parallel guide grooves at the top, and the length direction of each guide groove is consistent with the length direction of the rotating arm. The bottom of each slider is formed with several guide bars, and each guide bar slides in the corresponding guide groove. A horizontal No. 1 cylinder is fixed on the top of each rotating arm, and the output end of the No. 1 cylinder is fixedly connected to the corresponding slider, and the output direction of each No. 1 cylinder is consistent with the length direction of the corresponding rotating arm.

[0012] Furthermore, a horizontal strip fixing block is formed on the top of each slider, and a strip limiting groove is provided on the side of the strip fixing block facing the forming wheel. The length direction of the strip limiting groove is horizontal and perpendicular to the sliding direction of the slider, and a limiting strip is formed on one side of each strip pressing block that slides in the corresponding strip limiting groove.

[0013] Furthermore, a vertically upward No. 1 vertical pin is formed on the top of each strip-shaped pressure block, and a vertically upward No. 2 vertical pin is fixed on each strip-shaped fixed block. A horizontal tension spring is provided between the No. 1 vertical pin and the No. 2 vertical pin, and the two ends of the tension spring are respectively fixedly connected to the No. 1 vertical pin and the No. 2 vertical pin. A buffer block is fixed on the end of each strip-shaped fixed block close to the support bar.

[0014] Furthermore, a group of guide sliding bases are formed on both sides of the fixed platform, and each group of guide sliding bases includes two symmetrical strip supports, the length direction of each strip support is consistent with the axial direction of the capillary, and two strip slides are fixed at the bottom of each slide, and each strip slide slides on the corresponding strip support. The locking piece on each slide includes two symmetrical locking bolts, and each locking bolt passes through the slide and the strip slide vertically downward in sequence, and the lower end of each locking bolt is downward in conflict with the corresponding strip support.

[0015] Furthermore, a horizontal spline shaft is provided under the fixed platform, the axial direction of the spline shaft is consistent with the length direction of one of the strip supports, and both ends of the spline shaft are rotatably connected to one of the strip supports. A bracket is fixedly provided at the bottom of each slide, and a No. 1 bevel gear is rotatably provided on the bracket. The No. 1 bevel gear is coaxial with the spline shaft, and the spline shaft coaxially passes through the No. 1 bevel gear. The lower end of each rotating shaft is coaxially fixed with a No. 2 bevel gear, and the No. 2 bevel gear is meshed with the No. 1 bevel gear.

[0016] Furthermore, the valve body clamping mechanism includes a fixed clamping ring, a movable clamping ring and a No. 2 cylinder. An L-shaped support arm and a support seat are fixedly provided on the top of the fixed platform. The fixed clamping ring is fixedly connected to the end of the L-shaped support arm. The No. 2 cylinder is horizontally fixed to the support seat. The movable clamping ring is fixedly connected to the output end of the No. 2 cylinder. The movable clamping ring can be merged into a circle with the fixed clamping ring. A positioning seat located between the L-shaped support arm and the support seat is fixedly provided on the top of the fixed platform. A horizontal strip-shaped positioning groove is provided on the top of the positioning seat.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] First, the present invention achieves capillary bending through the cooperation of a forming wheel and a strip-shaped pressing block. Both the forming wheel and the strip-shaped pressing block are arranged on a slide. Therefore, in actual use, the position of the bending point on the capillary tube can be controlled by adjusting the distance between the slide and the fixed table. The farther the slide is from the fixed table, the farther the bending point on the capillary tube is from the pilot valve. Ultimately, the present invention is applicable to capillary bending under different processes.

[0019] Secondly, the device applies pressure to the capillary tube using a strip-shaped pressure block. The strip-shaped pressure block has a certain length. Therefore, during the bending process, the contact area between the strip-shaped pressure block and the capillary tube is large, so the local pressure on the capillary tube is relatively small, thereby preventing the capillary tube from being deformed due to excessive local pressure.

[0020] Third, while the rotating arm drives the strip pressure block to bend the capillary by rotating, the strip pressure block will slide in the opposite direction of the rotation of the rotating arm through the cooperation of the rack, gear No. 1, gear No. 2 and ring gear, so as to prevent the strip pressure block from breaking the capillary by rotating with the rotating arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention Figure 1 ;

[0022] Figure 2 yes Figure 1 A1 is a partial enlarged schematic diagram;

[0023] Figure 3 yes Figure 1 A2 is a partial enlarged schematic diagram;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the present invention Figure 2 ;

[0025] Figure 5 yes Figure 4 A3 is a partial enlarged schematic diagram;

[0026] Figure 6 It is a three-dimensional structural diagram of the valve body clamping mechanism;

[0027] Figure 7 It is a plan view of the bending component;

[0028] Figure 8 yes Figure 7 A4 is a partial enlarged schematic diagram;

[0029] Figure 9 It is a schematic diagram of the three-dimensional structure of the slide;

[0030] Figure 10 It is a schematic diagram of the three-dimensional structure of the bending component;

[0031] Figure 11 yes Figure 10 A partial enlarged schematic diagram shown in A5;

[0032] Figure 12 It is a schematic diagram of the three-dimensional structure of the slider;

[0033] Figure 13 It is a schematic diagram of the three-dimensional structure of the rotating arm;

[0034] Figure 14 It is a three-dimensional structural exploded view of the bar-shaped pressing block and the bar-shaped fixing block;

[0035] Figure 15 This is an exploded view of the three-dimensional structure of the slide and the strip support.

[0036] The numbers in the figure are: 1, pilot valve; 2, capillary tube; 3, fixed platform; 4, slide; 5, rotating arm; 6, forming wheel; 7, strip pressure block; 8, slide block; 9, semicircular groove; 10, rotating shaft; 11, bearing; 12, rack; 13, No. 1 gear; 14, No. 2 gear; 15, gear ring; 16, ring; 17, support bar; 18, connecting bar; 19, guide slide; 20, guide slide; 21, No. 1 cylinder; 22, strip fixed block; 23, strip limit groove; 2 4. Limit strip; 25. No. 1 vertical pin; 26. No. 2 vertical pin; 27. Tension spring; 28. Buffer block; 29. ​​Strip support; 31. Strip slide; 32. Locking bolt; 33. Spline shaft; 34. Bracket; 35. No. 1 bevel gear; 36. No. 2 bevel gear; 37. Fixed clamp ring; 38. Movable clamp ring; 39. No. 2 cylinder; 40. L-shaped support arm; 41. Support seat; 42. Positioning seat; 43. Strip positioning groove; 44. Sliding support foot; 45. Arc plate. DETAILED DESCRIPTION

[0037] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] refer to Figures 1 to 15 The device for forming a pilot valve for a directional valve comprises a pilot valve 1 and two capillaries 2 symmetrically connected to the pilot valve 1 (e.g. Figure 1 and Figure 3 As shown), and each capillary 2 is horizontal, and also includes a fixed platform 3, a valve body clamping mechanism is provided on the fixed platform 3, and slides 4 are provided on both sides of the fixed platform 3 for sliding in the horizontal direction, each slide 4 is connected to a locking piece, and each slide 4 is provided with a bending assembly, two groups of bending assemblies correspond to two capillaries 2, and each group of bending assemblies includes a rotating arm 5, a forming wheel 6 and a telescopic pipe pressing mechanism, the rotating arm 5 is horizontally connected to the slide 4 for rotation, the forming wheel 6 is connected to the rotating arm 5 for rotation, and the axial direction of the forming wheel 6 is vertical, the telescopic pipe pressing mechanism is provided on the rotating arm 5, the telescopic pipe pressing mechanism includes a strip pressure block 7 and a slider 8, and the slider 8 is slidably connected to the rotating arm 5 (as shown Figure 8As shown in the figure, the sliding direction of the slider 8 is consistent with the length direction of the rotating arm 5, the strip pressing block 7 is horizontally connected to the slider 8 for sliding, the strip pressing block 7 is located between the forming wheel 6 and the slider 8, the sliding direction of the strip pressing block 7 is horizontal, and the sliding direction of the strip pressing block 7 is perpendicular to the sliding direction of the slider 8, a semicircular groove 9 for embedding the capillary 2 is provided on the strip pressing block 7, and a driving mechanism for driving the strip pressing block 7 to move horizontally is provided between the strip pressing block 7 and the rotating arm 5.

[0039] Before bending the capillary tube 2 on the pilot valve 1, the pilot valve 1 needs to be fixed first. During this process, the pilot valve 1 is first placed on the fixing table 3, and then the two capillaries 2 are kept horizontal and respectively contact the two forming wheels 6. Finally, the pilot valve 1 is clamped and fixed by the valve body clamping mechanism (combined with Figure 1 and Figure 3 As shown in FIG), when the pilot valve 1 is fixed, the two capillaries 2 are also fixed. Thereafter, the slider 8 drives the strip pressing block 7 to press the corresponding capillary 2. During this process, the capillary 2 will be embedded in the semicircular groove 9 on the strip pressing block 7. Finally, the capillary 2 will be clamped between the forming wheel 6 and the strip pressing block 7 (as shown in FIG). Figure 2 As shown), thereafter, the two rotating arms 5 start to rotate synchronously, and the rotation directions of the two rotating arms 5 are opposite. When the rotating arms 5 rotate, the horizontal capillary 2 will bend along the peripheral wall of the corresponding forming wheel 6. At the same time, the driving mechanism will drive the corresponding strip pressing block 7 to move laterally in the opposite direction of the rotation of the rotating arm 5, so as to prevent the strip pressing block 7 rotating with the rotating arm 5 from breaking the capillary 2 (in the actual operation process, lubricating oil can be applied to the semicircular groove 9 to reduce the friction between the capillary 2 and the strip pressing block 7). When the capillary 2 is bent, the slider 8 will drive the strip pressing block 7 to slide in the opposite direction. At the same time, the valve body clamping mechanism will loosen the pilot valve 1, and finally The pilot valve 1 can be taken out together with the two bent capillaries 2. During the actual bending process, the capillary 2 needs to be bent according to the current process, that is, the bending degree and bending point of the capillary 2 will be different. The bending degree of the capillary 2 can be controlled by the rotation angle of the rotating arm 5, and the bending point can be controlled by the slide 4. The specific process is as follows: before the pilot valve 1 is fixed, the distance between the forming wheel 6 and the fixed table 3 is controlled by sliding the slide 4. The farther the forming wheel 6 is from the fixed table 3, the farther the bending point on the capillary 2 is from the pilot valve 1. After the slide 4 is adjusted, the slide 4 can be locked by the locking piece to prevent the slide 4 from moving horizontally during the bending process.

[0040] In order to show how the rotating arm 5 realizes rotation, the following features are set:

[0041] Each slide 4 is provided with a vertical rotating shaft 10 (such as Figure 9As shown), one end of each rotating arm 5 is fixedly connected to the rotating shaft 10, each forming wheel 6 is arranged above the rotating arm 5, and each forming wheel 6 is coaxially embedded with a bearing 11, and each bearing 11 is coaxially sleeved on the upper end of the corresponding rotating shaft 10.

[0042] The rotating arm 5 is rotated by the rotating shaft 10, and the forming wheel 6 is connected to the rotating shaft 10 by the bearing 11. When the rotating shaft 10 drives the rotating arm 5 to rotate, the forming wheel 6 will not rotate, thereby preventing the forming wheel 6 from rubbing against the capillary 2. Since one end of the rotating arm 5 is connected to the rotating shaft 10, in order to stabilize the rotation of the rotating arm 5, a sliding support foot 44 (such as Figure 7 As shown), the sliding support foot 44 can be a roller or a ball, and the slide 4 is formed with an arc-shaped plate 45 (as shown) for the sliding support foot 44 to walk on. Figure 9 shown).

[0043] In order to show the specific structure of the drive mechanism, the following features are set:

[0044] Each set of driving structures includes a rack 12, a number one gear 13, a number two gear 14 and a ring gear 15. A circle ring 16 is formed on the top of each slide 4, and the ring 16 is coaxially sleeved on the outside of the corresponding rotating shaft 10. The ring gear 15 is coaxially fixedly connected to the corresponding ring 16, and the ring gear 15 is located between the rotating arm 5 and the slide 4. The number one gear 13 and the number two gear 14 are both rotatably connected to the bottom of the rotating arm 5, and the number one gear 13 is meshed with the ring gear 15, and the number two gear 14 is meshed with the number one gear 13. One end of each bar-shaped pressing block 7 is formed with a support bar 17 (such as Figure 11 As shown), the length direction of the support bar 17 is consistent with the length direction of the rotating arm 5, and a connecting bar 18 is fixed on the support bar 17. The rack 12 is horizontally fixedly connected to the connecting bar 18. The rack 12 is engaged with the second gear 14, and the rack 12 is parallel to the corresponding strip-shaped pressure block 7.

[0045] When the rotating arm 5 rotates, the rotating arm 5 will drive the strip pressure block 7 to rotate, so that the capillary 2 pressed between the strip pressure block 7 and the forming wheel 6 will be bent. At the same time, the No. 1 gear 13 connected to the rotation of the rotating arm 5 will revolve around the ring gear 15 and rotate on its own. When the No. 1 gear 13 rotates, the No. 2 gear 14 will drive the rack 12 to translate. In this process, the No. 2 gear 14 plays a reversing role, so that the rack 12 will drive the strip pressure block 7 to translate in the opposite direction of the rotation of the rotating arm 5 through the connecting bar 18, and finally prevent the capillary 2 from being broken by the translation of the strip pressure block 7.

[0046] In order to show how the slider 8 slides, the following features are set:

[0047] The top of each rotating arm 5 begins to have a plurality of mutually parallel guide grooves 19 (such as Figure 13 As shown), and the length direction of each guide slot 19 is consistent with the length direction of the rotating arm 5, and the bottom of each slider 8 is formed with a plurality of guide strips 20 (as shown Figure 12 As shown), each guide slide 20 slides in the corresponding guide groove 19, and a horizontal No. 1 cylinder 21 is fixed on the top of each rotating arm 5. The output end of the No. 1 cylinder 21 is fixedly connected to the corresponding slider 8, and the output direction of each No. 1 cylinder 21 is consistent with the length direction of the corresponding rotating arm 5.

[0048] Each slider 8 slides on the rotating arm 5 through the cooperation between the guide slide bar 20 at its bottom and the guide slide groove 19 at the top of the rotating arm 5. The No. 1 cylinder 21 provided on the rotating arm 5 is used to drive the corresponding slider 8 to slide along the length direction of the rotating arm 5.

[0049] In order to show how the strip-shaped pressing block 7 is slidably connected to the slider 8, the following features are set:

[0050] A horizontal strip fixing block 22 is formed on the top of each slider 8, and a strip limiting groove 23 is provided on the side of the strip fixing block 22 facing the forming wheel 6. The length direction of the strip limiting groove 23 is horizontal and perpendicular to the sliding direction of the slider 8. A limiting strip 24 that slides in the corresponding strip limiting groove 23 is formed on one side of each strip pressing block 7.

[0051] Each strip-shaped pressing block 7 achieves lateral sliding by cooperating with the limiting strip 24 on one side thereof and the strip-shaped limiting groove 23 on the strip-shaped fixing block 22. When processing the strip-shaped limiting groove 23 and the limiting strip 24, the cross-sections of the strip-shaped limiting groove 23 and the limiting strip 24 are both T-shaped, thereby ensuring the stability of the strip-shaped pressing block 7 during lateral sliding.

[0052] In order to achieve the automatic reset of the strip pressing block 7 after lateral movement, the following features are set:

[0053] A vertically upward No. 1 vertical pin 25 is formed on the top of each strip-shaped pressure block 7, and a vertically upward No. 2 vertical pin 26 is fixed on each strip-shaped fixed block 22. A horizontal tension spring 27 is provided between the No. 1 vertical pin 25 and the No. 2 vertical pin 26, and the two ends of the tension spring 27 are respectively fixedly connected to the No. 1 vertical pin 25 and the No. 2 vertical pin 26. A buffer block 28 is fixed on one end of each strip-shaped fixed block 22 close to the support bar 17.

[0054] In the initial state, the No. 1 cylinder 21 drives the slider 8 away from the corresponding forming wheel 6. At this time, the rack 12 is separated from the No. 2 gear 14, the tension spring 27 is in a contracted state, and the support bar 17 on the strip pressure block 7 conflicts with the buffer block 28. When the No. 1 cylinder 21 drives the slider 8 to press the strip pressure block 7 toward the capillary 2, the rack 12 connected to the strip pressure block 7 through the connecting bar 18 will mesh with the No. 2 gear 14. After that, when the rotating arm 5 rotates, the rack 12 will drive the strip pressure block 7 to slide in the opposite direction of the rotation of the rotating arm 5. In this process, the strip pressure block 7 will stretch and pull. Spring 27, so that the tension spring 27 generates tension. When the capillary 2 is bent to the specified curvature, the No. 1 cylinder 21 will drive the slider 8 to move away from the corresponding forming wheel 6 again. At this time, the rack 12 will be separated from the No. 2 gear 14 again. When the rack 12 is separated from the No. 2 gear 14, the tension spring 27 will immediately drive the strip pressure block 7 to slide in the opposite direction to reset through tension. After the strip pressure block 7 slides in the opposite direction, the support bar 17 provided on the strip pressure block 7 will be pressed on the buffer block 28, and finally the buffer block 28 will weaken the impact of the tension spring 27 driving the strip pressure block 7 to reset.

[0055] In order to show how the slide 4 slides and the specific structure of the locking member, the following features are set:

[0056] A group of guide sliding bases are formed on both sides of the fixed platform 3, and each group of guide sliding bases includes two symmetrical strip supports 29. The length direction of each strip support 29 is consistent with the axial direction of the capillary 2. Two strip slides 31 are fixed to the bottom of each slide 4, and each strip slide 31 slides on the corresponding strip support 29. The locking parts on each slide 4 include two symmetrical locking bolts 32. Each locking bolt 32 passes through the slide 4 and the strip slide 31 vertically downward in sequence, and the lower end of each locking bolt 32 is downward in conflict with the corresponding strip support 29.

[0057] Each slide 4 slides by cooperating with the strip slide 31 and the strip support 29, and the sliding direction of the slide 4 is consistent with the axial direction of the capillary 2. When the slide 4 needs to be locked, the locking bolt 32 is tightened downward so that the lower end of the locking bolt 32 is pressed against the strip support 29. When the slide 4 needs to be unlocked, the locking bolt 32 is loosened upward so that the lower end of the locking bolt 32 is separated from the strip support 29.

[0058] In order to demonstrate how to achieve synchronous rotation of the two arms 5 without affecting the translation of the slide 4, the following features are set:

[0059] A horizontal spline shaft 33 is provided below the fixed platform 3. The axial direction of the spline shaft 33 is consistent with the length direction of one of the strip supports 29. Both ends of the spline shaft 33 are rotatably connected to one of the strip supports 29. A bracket 34 is fixed to the bottom of each slide 4. A No. 1 bevel gear 35 is rotatably provided on the bracket 34. The No. 1 bevel gear 35 is coaxial with the spline shaft 33, and the spline shaft 33 coaxially passes through the No. 1 bevel gear 35. The lower end of each rotating shaft 10 is coaxially fixed with a No. 2 bevel gear 36, which meshes with the No. 1 bevel gear 35.

[0060] When the slide 4 slides, the No. 1 bevel gear 35 connected to the slide 4 through the bracket 34 will slide on the spline shaft 33. At the same time, the No. 2 bevel gear 36 connected to the rotating shaft 10 will move along with the No. 1 bevel gear 35. In this way, regardless of whether the slide 4 slides or not, the No. 1 bevel gear 35 and the No. 2 bevel gear 36 always remain in a meshing state. Since the spline shaft 33 passes through the No. 1 bevel gear 35, when the spline shaft 33 rotates, the spline shaft 33 will drive the No. 1 bevel gear 35 to rotate, and the No. 1 bevel gear 35 will drive the rotating shaft 10 to rotate through the No. 2 bevel gear 36. Finally, the rotating shaft 10 will drive the corresponding rotating arm 5 to rotate. In actual use, a motor (not shown in the figure) for driving the spline shaft 33 to rotate can be fixedly installed next to the spline shaft 33. When the No. 1 bevel gear 35 is installed, the two No. 1 bevel gears 35 are in a symmetrical state. In this way, when the spline shaft 33 rotates, the two rotating arms 5 will rotate synchronously and in opposite directions.

[0061] In order to show the specific structure of the valve body clamping mechanism, the following features are set:

[0062] The valve body clamping mechanism includes a fixed clamping ring 37, a movable clamping ring 38 and a No. 2 cylinder 39. An L-shaped support arm 40 and a bracket 41 are fixedly provided on the top of the fixed platform 3. The fixed clamping ring 37 is fixedly connected to the end of the L-shaped support arm 40. The No. 2 cylinder 39 is horizontally fixedly connected to the bracket 41. The movable clamping ring 38 is fixedly connected to the output end of the No. 2 cylinder 39. The movable clamping ring 38 can be merged into a circle with the fixed clamping ring 37. A positioning seat 42 is fixedly provided on the top of the fixed platform 3 and is located between the L-shaped support arm 40 and the bracket 41. A horizontal strip-shaped positioning groove 43 is provided on the top of the positioning seat 42.

[0063] When fixing the pilot valve 1, first place the pilot valve 1 on the fixing platform 3. During this process, keep the two capillaries 2 on the pilot valve 1 in a horizontal state, then insert the lower end of the pilot valve 1 into the strip positioning groove 43, and then slide the pilot valve 1. The strip positioning groove 43 is used to prevent the pilot valve 1 from deviating left and right. When the sliding pilot valve 1 is in conflict with the capillary 2 and the corresponding forming wheel 6, the pilot valve 1 body will conflict with the fixed clamping ring 37. Then, the No. 2 cylinder 39 drives the movable clamping ring 38 to move toward the pilot valve 1, and finally the pilot valve 1 body will be clamped between the movable clamping ring 38 and the fixed clamping ring 37. When the capillary 2 is bent, the pilot valve 1 needs to be taken out. At this time, the No. 1 cylinder 21 will drive the strip pressure block 7 away from the capillary 2, and the No. 2 cylinder 39 will drive the movable clamping ring 38 away from the pilot valve 1 body. Finally, the capillary 2 is separated from the forming wheel 6 by sliding the pilot valve 1 and then the pilot valve 1 can be taken out.

[0064] Working principle:

[0065] Before bending the capillary tube 2 on the pilot valve 1, the pilot valve 1 needs to be fixed first. During this process, the pilot valve 1 is first placed on the fixing table 3, and then the two capillaries 2 are kept horizontal and respectively contact the two forming wheels 6. Finally, the pilot valve 1 is clamped and fixed by the valve body clamping mechanism (combined with Figure 1 and Figure 3 As shown in FIG), when the pilot valve 1 is fixed, the two capillaries 2 are also fixed. Thereafter, the slider 8 drives the strip pressing block 7 to press the corresponding capillary 2. During this process, the capillary 2 will be embedded in the semicircular groove 9 on the strip pressing block 7. Finally, the capillary 2 will be clamped between the forming wheel 6 and the strip pressing block 7 (as shown in FIG). Figure 2As shown), thereafter, the two rotating arms 5 start to rotate synchronously, and the rotation directions of the two rotating arms 5 are opposite. When the rotating arms 5 rotate, the horizontal capillary 2 will bend along the peripheral wall of the corresponding forming wheel 6. At the same time, the driving mechanism will drive the corresponding strip pressing block 7 to move laterally in the opposite direction of the rotation of the rotating arm 5, so as to prevent the strip pressing block 7 rotating with the rotating arm 5 from breaking the capillary 2 (in the actual operation process, lubricating oil can be applied to the semicircular groove 9 to reduce the friction between the capillary 2 and the strip pressing block 7). When the capillary 2 is bent, the slider 8 will drive the strip pressing block 7 to slide in the opposite direction. At the same time, the valve body clamping mechanism will loosen the pilot valve 1, and finally The pilot valve 1 can be taken out together with the two bent capillaries 2. During the actual bending process, the capillary 2 needs to be bent according to the current process, that is, the bending degree and bending point of the capillary 2 will be different. The bending degree of the capillary 2 can be controlled by the rotation angle of the rotating arm 5, and the bending point can be controlled by the slide 4. The specific process is as follows: before the pilot valve 1 is fixed, the distance between the forming wheel 6 and the fixed table 3 is controlled by sliding the slide 4. The farther the forming wheel 6 is from the fixed table 3, the farther the bending point on the capillary 2 is from the pilot valve 1. After the slide 4 is adjusted, the slide 4 can be locked by the locking piece to prevent the slide 4 from moving horizontally during the bending process.

[0066] The above embodiments merely represent one or several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A pilot valve forming device for machining a reversing valve, comprising a pilot valve and two capillaries symmetrically connected to the pilot valve, each capillary being horizontal, characterized in that: Material toggling mechanism, its both sides respectively have a cylinder pressure, and the cylinder pressure bar connects swing arm, and the swing arm end face has hook portion, and a bar passes position between the end of two swing arms and the hook portion.

2. A pilot valve forming device for machining a reversing valve according to claim 1, characterized in that: Each slide is provided with a vertical rotating shaft, one end of each rotating arm is fixedly connected to the rotating shaft, each forming wheel is arranged above the rotating arm, each forming wheel is coaxially embedded with a bearing, and each bearing is coaxially sleeved on the upper end of the corresponding rotating shaft.

3. A pilot valve forming device for machining a reversing valve according to claim 2, characterized in that: Each driving structure includes a rack, gear No. 1, gear No. 2 and a ring gear. A circular ring is formed on the top of each slide, and the circular ring is coaxially sleeved on the outside of the corresponding rotating shaft. The ring gear is coaxially connected to the corresponding circular ring, and the ring gear is located between the rotating arm and the slide. Gear No. 1 and gear No. 2 are both rotatably connected to the bottom of the rotating arm, and gear No. 1 is meshed with the ring gear, and gear No. 2 is meshed with gear No.

1. A support bar is formed at one end of each strip-shaped pressure block, and the length direction of the support bar is consistent with the length direction of the rotating arm. A connecting bar is fixed on the support bar, and the rack is horizontally connected to the connecting bar, the rack is meshed with gear No. 2, and the rack is parallel to the corresponding strip-shaped pressure block.

4. A pilot valve forming device for machining a reversing valve according to claim 1, characterized in that: There are several parallel guide grooves at the top of each rotating arm, and the length direction of each guide groove is consistent with the length direction of the rotating arm. There are several guide bars at the bottom of each slider, and each guide bar slides in the corresponding guide groove. A horizontal No. 1 cylinder is fixed on the top of each rotating arm, and the output end of the No. 1 cylinder is fixedly connected to the corresponding slider, and the output direction of each No. 1 cylinder is consistent with the length direction of the corresponding rotating arm.

5. The pilot valve forming device for machining a reversing valve according to claim 3, characterized in that: A horizontal strip fixing block is formed on the top of each slider, and a strip limiting groove is provided on the side of the strip fixing block facing the forming wheel. The length direction of the strip limiting groove is horizontal and perpendicular to the sliding direction of the slider, and a limiting strip that slides in the corresponding strip limiting groove is formed on one side of each strip pressing block.

6. A pilot valve forming device for machining a reversing valve according to claim 5, characterized in that: A vertically upward No. 1 vertical pin is formed on the top of each strip-shaped pressure block, and a vertically upward No. 2 vertical pin is fixed on each strip-shaped fixed block. A horizontal tension spring is provided between the No. 1 vertical pin and the No. 2 vertical pin, and the two ends of the tension spring are respectively fixedly connected to the No. 1 vertical pin and the No. 2 vertical pin. A buffer block is fixed on the end of each strip-shaped fixed block close to the support bar.

7. The device for forming a pilot valve for a directional valve according to claim 2, characterized in that: A group of guide sliding bases are formed on both sides of the fixed platform, and each group of guide sliding bases includes two symmetrical strip supports, the length direction of each strip support is consistent with the axial direction of the capillary, and two strip slides are fixed at the bottom of each slide, each strip slide slides on the corresponding strip support, and the locking piece on each slide includes two symmetrical locking bolts, each locking bolt vertically downwards through the slide and the strip slide in turn, and the lower end of each locking bolt downwardly conflicts with the corresponding strip support.

8. The device for forming a pilot valve for a directional valve according to claim 7, characterized in that: A horizontal spline shaft is provided under the fixed platform. The axial direction of the spline shaft is consistent with the length direction of one of the strip supports. Both ends of the spline shaft are rotatably connected to one of the strip supports. A bracket is fixedly provided at the bottom of each slide. A No. 1 bevel gear is rotatably provided on the bracket. The No. 1 bevel gear is coaxial with the spline shaft, and the spline shaft coaxially passes through the No. 1 bevel gear. The lower end of each rotating shaft is coaxially fixed with a No. 2 bevel gear, and the No. 2 bevel gear is meshed with the No. 1 bevel gear.

9. The pilot valve forming device for machining a reversing valve according to claim 1, characterized in that: The valve body clamping mechanism includes a fixed clamping ring, a movable clamping ring and a No. 2 cylinder. An L-shaped support arm and a support seat are fixedly provided on the top of the fixed platform. The fixed clamping ring is fixedly connected to the end of the L-shaped support arm. The No. 2 cylinder is horizontally fixed to the support seat. The movable clamping ring is fixedly connected to the output end of the No. 2 cylinder. The movable clamping ring can be merged into a circle with the fixed clamping ring. A positioning seat located between the L-shaped support arm and the support seat is fixedly provided on the top of the fixed platform. A horizontal strip-shaped positioning groove is provided on the top of the positioning seat.

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