Electromagnetic valve group, pneumatic assembly and fitness equipment

Abstract

The invention discloses an electromagnetic valve group, a pneumatic assembly and fitness equipment, and relates to the technical field of pneumatic equipment. In the electromagnetic valve group, a first on-off valve and a second on-off valve are electromagnetic valves and are fixedly connected to the outer side of the valve plate; the valve plate is provided with an equipment interface, an air inlet and an air outlet, and is provided with an air inlet path, an air outlet path and a middle air path; the air inlet end of the first on-off valve is communicated with the air inlet through an air inlet path, and the air outlet end of the second on-off valve is communicated with the air outlet through an air outlet path; the first end of the middle gas circuit communicates with the equipment connector, and the second end of the middle gas circuit, the gas outlet end of the first on-off valve and the gas inlet end of the second on-off valve are connected. The electromagnetic valve group can control the on-off of a gas circuit through electric control, so that the control precision can be improved; during deflation, the pneumatic actuator and the air source can deflate through the second on-off valve, the deflation air path and the deflation port, and the deflation path is simplified; in the assembling process, all the electromagnetic valves can be assembled on the outer side of the valve plate in a unified mode and are directly communicated through an air path in the valve plate, and assembling is convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pneumatic equipment, in particular to an electromagnetic valve group, a pneumatic assembly and fitness equipment. BACKGROUND

[0002] At present, some fitness pneumatic products on the market control the air inlet and outlet of the air cylinder through a manual valve, mainly rely on manual operation of the exerciser to make the resistance value displayed by the equipment close to the set resistance, and the control precision is low and the operation is inconvenient.

[0003] Therefore, how to improve the control precision of the air inlet and outlet of the air cylinder is a technical problem to be solved by the person skilled in the art at present. SUMMARY

[0004] Therefore, the purpose of the present application is to provide an electromagnetic valve group, a pneumatic assembly and fitness equipment, which has high control precision for the air inlet and outlet of the pneumatic actuator.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] In one aspect, the present application provides an electromagnetic valve group, which comprises a valve plate, a first on-off valve and a second on-off valve; the first on-off valve and the second on-off valve are both electromagnetic valves and are fixedly connected to the outer side of the valve plate; the valve plate is provided with a device interface, an air inlet and an air outlet, and the valve plate is internally provided with an air inlet gas path, an air outlet gas path and an intermediate gas path; the air inlet of the first on-off valve is communicated with the air inlet through the air inlet gas path, and the air outlet of the second on-off valve is communicated with the air outlet through the air outlet gas path; the first end of the intermediate gas path is communicated with the device interface, and the second end of the intermediate gas path, the air outlet of the first on-off valve and the air inlet of the second on-off valve are connected.

[0007] In an exemplary embodiment, a third on-off valve and a fourth on-off valve are respectively fixed to the outer side of the valve plate; the third on-off valve and the fourth on-off valve are both electromagnetic valves, and the flow rates of the third on-off valve and the fourth on-off valve are different when they are opened; the third on-off valve and the fourth on-off valve are connected in parallel to form an adjusting branch, and are connected in series in the intermediate gas path.

[0008] In an exemplary embodiment, the first on-off valve, the second on-off valve, the third on-off valve and the fourth on-off valve are sequentially arranged on the first end surface of the valve plate in a first direction.

[0009] In an exemplary embodiment, the intermediate gas path comprises a first main path and a first branch path; the first main path extends linearly along the first direction, and one end of the first main path forms a first opening on a first side of the valve plate, and a first blocking member is arranged on the first opening; a plurality of first branch paths are arranged along the first direction in sequence, one end of each first branch path is connected to the first main path, and the other end of each first branch path is connected to a first valve interface of the first end face, and each first valve interface is connected to an outlet end of the first on-off valve, an inlet end of the second on-off valve, a first valve port of the third on-off valve, and a first valve port of the fourth on-off valve, respectively.

[0010] In an exemplary embodiment, at least part of the first branch path further has a second opening extending to a second side or a third side of the valve plate, and a second blocking member is arranged on the second opening; the first side is arranged between the second side and the third side, and the second side and the third side are oppositely arranged.

[0011] In an exemplary embodiment, one of the second side and the third side is provided with a device interface, and the other is provided with a gas exhaust port; a device connector is fixedly connected to the device interface, and a gas exhaust connector is fixedly connected to the gas exhaust port.

[0012] In an exemplary embodiment, the intermediate gas path comprises a second main path, a second branch path, and a third branch path; the second main path extends linearly along the first direction, and one end of the second main path forms a third opening on a fourth side of the valve plate, and a third blocking member is arranged on the third opening; a plurality of second branch paths are arranged along the first direction in sequence, one end of each second branch path is connected to the second main path, and the other end of each second branch path is connected to a second valve interface of the first end face, and each second valve interface is connected to a second valve port of the third on-off valve and a second valve port of the fourth on-off valve, respectively; one end of the third branch path is connected to the second main path, and the other end of the third branch path is connected to the device interface.

[0013] In another aspect, the present application provides a pneumatic assembly, comprising a cylinder, a main gas tank, and an electromagnetic valve group as described above; the main gas tank is connected to the gas inlet, and the cylinder is connected to the device interface; the cylinder comprises a piston, and the piston has a piston cavity built-in or a piston groove arranged on an outer surface.

[0014] In one exemplary embodiment, the cylinder includes a cylinder body and a cylinder guide rod; the piston is slidably connected to the cylinder body; the cylinder guide rod is fixed to a first axial side of the piston and extends axially out of the cylinder body; a piston groove is formed on a second axial side of the piston; a piston screw is also provided on the piston, and an internal thread is provided at one end of the cylinder guide rod; the end of the piston screw is built into the piston groove and axially presses against the bottom of the piston groove; the screw thread of the piston screw is locked to the internal thread of the guide rod.

[0015] Another aspect of the present invention provides a fitness device, including the solenoid valve assembly described above.

[0016] The solenoid valve assembly provided by this invention includes a valve plate, a first on / off valve, and a second on / off valve. Both the first and second on / off valves are solenoid valves and are fixedly connected to the outside of the valve plate. The valve plate is provided with an equipment interface, an air inlet, and an air outlet. An air inlet path, an air outlet path, and an intermediate path are provided inside the valve plate. The air inlet end of the first on / off valve is connected to the air inlet through the air inlet path, and the air outlet end of the second on / off valve is connected to the air outlet through the air outlet path. The first end of the intermediate path is connected to the equipment interface, and the second end of the intermediate path, the air outlet end of the first on / off valve, and the air inlet end of the second on / off valve are connected together.

[0017] The aforementioned solenoid valve assembly features solenoid valves that can electrically control the opening and closing of the inlet and outlet air paths, providing convenient control and improving the accuracy of charging and discharging. Furthermore, since the second end of the intermediate air path, the outlet end of the first on / off valve, and the inlet end of the second on / off valve are connected, during discharging, the pneumatic actuator and air source can all discharge air through the second on / off valve, the discharging air path, and the discharging port, simplifying the discharging path and achieving unified and convenient discharging. Additionally, during assembly, each solenoid valve can be uniformly mounted on the outside of the valve plate, directly connected via the air path within the valve plate, facilitating assembly. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the air path during cylinder charging according to a specific embodiment of the present invention.

[0020] Figure 2 A schematic diagram of the air path when the cylinder and the main air tank are simultaneously vented, according to a specific embodiment of the present invention;

[0021] Figure 3This is a first axonometric view of an electromagnetic component according to a specific embodiment of the present invention, wherein the valve plate portion is shown in perspective.

[0022] Figure 4 This is a simplified diagram of the internal air passage layout of the valve plate in a specific embodiment of the present invention;

[0023] Figure 5 This is a second axonometric view of the electromagnetic component according to a specific embodiment of the present invention;

[0024] Figure 6 An external view of the cylinder provided in a specific embodiment of the present invention;

[0025] Figure 7 This is a cross-sectional view of the cylinder provided in a specific embodiment of the present invention.

[0026] Figure label:

[0027] Cylinder guide rod 1, guide rod cavity 11, guide rod internal thread 12, guide rod nut 13;

[0028] Cylinder body 2, first end cover 21, intermediate through hole 211, first channel 212, first end sealing ring 213, buffer sealing ring 214, first hole retaining ring 215, guide sleeve 216, second end cover 22, cylinder tailstock 221, second channel 222, second end sealing ring 223, second hole retaining ring 224, cylinder barrel 23, first air inlet 231, second air inlet 232;

[0029] Piston 3, piston groove 31, large diameter hole 311, small diameter hole 312, retaining ring 313, elastic washer 314, piston sleeve 32, sleeve sealing ring 321, magnetic ring 33, piston sealing ring 34, guide strip 35, buffer pad 36.

[0030] Piston screw 4, end 41, screw 42;

[0031] Valve plate 5, first side 51, second side 52, third side 53, fourth side 54, first end face 55, air inlet 56, air inlet 561, air inlet connector 562, air vent 57, air vent 571, air vent connector 572, first main path 58, first opening 581, first sealing element 582, first branch path 59, second opening 591, second sealing element 592, second main path 510, third opening 5101, third sealing element 5102, second branch path 511, third branch path 512, equipment interface 5121, equipment connector 5122, mounting position 513;

[0032] First on / off valve 6;

[0033] Second shut-off valve 7;

[0034] Third shut-off valve 8;

[0035] Fourth shut-off valve 9;

[0036] Main gas tank 10;

[0037] First direction X, second direction Y, third direction Z. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] The core of this invention is to provide a solenoid valve assembly, a pneumatic component, and fitness equipment, which have high control accuracy for the charging and discharging of pneumatic actuators.

[0040] For a specific embodiment of the solenoid valve assembly provided by this invention, please refer to [the original text]. Figures 1 to 7 The system includes a valve plate 5 and multiple solenoid valves, each of which is fixedly connected to the outside of the valve plate 5. Multiple air passages are provided in the valve plate 5 as needed to connect to the corresponding solenoid valves. Optionally, at least some of the solenoid valves are two-position, two-normally closed solenoid valves.

[0041] like Figures 1 to 5 As shown, the valve plate 5 is provided with a device interface 5121, an air inlet 561, and an air vent 571. The device interface 5121 is used to connect to the device to be charged or deflated, such as a cylinder, or other pneumatic actuators such as air bags. The air inlet 561 is used to connect to an air source, such as the main air tank 10; the air vent 571 is used to vent air from the pneumatic actuator and the main air tank 10.

[0042] The valve plate 5 contains an intake air passage 56, a vent air passage 57, and an intermediate air passage. For example... Figure 1 As shown, the air inlet of the first on / off valve 6 is connected to the air inlet 561 through the air inlet passage 56, and the air outlet of the second on / off valve 7 is connected to the air outlet 571 through the air vent passage 57. The first end d of the intermediate air passage is connected to the equipment interface 5121, and the second end c of the intermediate air passage is connected to the air outlet of the first on / off valve 6 and the air inlet of the second on / off valve 7.

[0043] When the cylinder is being filled, the first on / off valve 6 is opened and the second on / off valve 7 is closed. Gas from the main air tank 10 is supplied to the cylinder through the air inlet 561, the air inlet passage 56, the first on / off valve 6, the intermediate air passage, and the equipment interface 5121. When the cylinder is being deflated, the second on / off valve 7 is opened and the first on / off valve 6 is closed. Gas is released from the cylinder through the equipment interface 5121, the intermediate air passage, the second on / off valve 7, the deflation passage 57, and the deflation port 571. When the main air tank 10 also needs to be deflated, both the first on / off valve 6 and the second on / off valve 7 are opened. Gas is released from the main air tank 10 through the air inlet 561, the air inlet passage 56, the first on / off valve 6, the second on / off valve 7, the deflation passage 57, and the deflation port 571.

[0044] The aforementioned solenoid valve assembly has solenoid valves that can electrically control the opening and closing of the inlet air passage 56 and the venting air passage 57, making control convenient and improving the control accuracy of charging and discharging. At the same time, since the second end c of the intermediate air passage, the outlet end of the first on-off valve 6, and the inlet end of the second on-off valve 7 are connected, during venting, the pneumatic actuator and the air source can both vent through the second on-off valve 7, the venting air passage 57, and the venting port 571, simplifying the venting path, achieving unified venting, and making venting convenient. In addition, during assembly, each solenoid valve can be uniformly assembled on the outside of the valve plate 5, directly connected through the air passage inside the valve plate 5, making assembly convenient.

[0045] In some embodiments, such as Figure 4 As shown, the solenoid valve also includes a third on / off valve 8 and a fourth on / off valve 9, respectively fixed to the outside of the valve plate 5. When the third on / off valve 8 and the fourth on / off valve 9 are open, the flow rates are different to achieve precise control of the inflation process. For example, the flow rate of the third on / off valve 8 is greater than that of the fourth on / off valve 9; optionally, the flow rate of the third on / off valve 8 can be 3-4 times the flow rate of the fourth on / off valve 9. Furthermore, structurally, the different flow rates can be achieved by varying the size of the orifices through which the fluid flows within the valve.

[0046] The third-way shut-off valve 8 and the fourth-way shut-off valve 9 are connected in parallel to form a regulating branch, and then connected in series in the intermediate air circuit. When the cylinder is being charged, if... Figure 1 As shown, close the second on / off valve 7. Based on the cylinder resistance setting, first open the first on / off valve 6, third on / off valve 8, and fourth on / off valve 9. The main air tank 10 enters the third on / off valve 8 and fourth on / off valve 9 via the first on / off valve 6 and the second end c of the intermediate air path, then merges and enters the cylinder via the first end d of the intermediate air path and equipment interface 5121. (Refer to...) Figure 1 The upward arrow indicates the airflow direction; when the actual resistance of the cylinder is close to the set resistance, for example, when the actual resistance is not less than 95% of the set resistance, close the third on-off valve 8 with a large flow rate, and connect the branch of the fourth on-off valve 9 with a small flow rate in the regulating branch. Rely on the fourth on-off valve 9 with a small flow rate to slowly continue to charge the cylinder, reducing the impact of the large flow rate gas and causing instability in the gas system. When the cylinder reaches the set resistance, close the first on-off valve 6 and the fourth on-off valve 9 at the same time.

[0047] When the cylinder is vented, the second shut-off valve 7, the third shut-off valve 8, and the fourth shut-off valve 9 open simultaneously; additionally, if Figure 2 As shown, by simultaneously opening the first on / off valve 6, the second on / off valve 7, the third on / off valve 8, and the fourth on / off valve 9, the main air tank 10 and the cylinder can release air simultaneously. (Refer to...) Figure 2 The upward arrow indicates the direction of airflow.

[0048] In some embodiments, such as Figure 3 and Figure 5 As shown, there are four solenoid valves: a first on / off valve 6, a second on / off valve 7, a third on / off valve 8, and a fourth on / off valve 9. These four valves are sequentially arranged along the first direction X on the first end face 55 of the valve plate 5, linearly arranged on one surface of the valve plate 5 via the solenoid valves, facilitating unified assembly of each valve. Of course, in other embodiments, the solenoid valves can also be distributed on different surfaces of the valve plate 5, or arranged in a matrix on one surface; furthermore, the number of solenoid valves can also be different, such as three or five.

[0049] It should be noted that the first direction X can correspond to the length direction of the valve plate 5. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The second direction Y corresponds to the width direction of the valve plate 5, and the third direction Z corresponds to the thickness direction of the valve plate 5. Optionally, the length of the valve plate 5 is greater than its width, which is greater than its thickness. In addition, on the valve plate 5, the first end face 55 is one end face in the thickness direction of the valve plate 5, the first side face 51 and the fourth side face 54 are the two sides at both ends in the length direction of the valve plate 5, and the second side face 52 and the third side face 53 are the two sides at both ends in the width direction of the valve plate 5.

[0050] In some embodiments, such as Figure 3 and Figure 4 As shown, the intermediate gas path includes a first main path 58 and a first branch path 59. The first main path 58 extends in a straight line along the first direction X, and one end of it forms a first opening 581 on the first side 51 of the valve plate 5. A first sealing element 582 is provided on the first opening 581. The first sealing element 582 is a threaded plug. The first main path 58 is easy to process and easy to maintain.

[0051] Four first branch lines 59 are arranged sequentially along the first direction X. One end of each first branch line 59 is connected to the first main line 58, and the other end is connected to the first valve interface a of the first end face 55. The four first valve interfaces a are respectively connected to the outlet end of the first on-off valve 6, the inlet end of the second on-off valve 7, the first valve port of the third on-off valve 8, and the first valve port of the fourth on-off valve 9. At this time, the first main line 58 and each first branch line 59 cooperate to realize the connection between the outlet end of the first on-off valve 6 and other solenoid valves.

[0052] It should be noted that multiple mounting positions 513 are sequentially arranged along the first direction X on the first end face 55 of the valve plate 5, respectively for sealing and connecting each solenoid valve. Each mounting position 513 is provided with a first valve interface a and a second valve interface b, which are used to connect the two valve ports on the solenoid valve. Furthermore, during assembly, each solenoid valve only needs to be installed in its corresponding mounting position 513, making operation convenient. Additionally, the valve plate 5 can be integrally machined or formed by fastening two plates together along their thickness direction.

[0053] In some embodiments, such as Figure 3 and Figure 4 As shown, at least a portion of the first branch 59 also has a second opening 591 extending to the second side 52 or the third side 53 of the valve plate 5. A second sealing element 592 is provided on the second opening 591 to facilitate the processing of the first branch 59. The second sealing element 592 is specifically a threaded plug.

[0054] For example Figure 3 and Figure 4 As shown, the first branch 59 connecting the first on / off valve 6 has a second opening 591, which is located on the second side 52; the second opening 591 of the first branch 59 connecting the third on / off valve 8 and the second branch 59 connecting the fourth on / off valve 9 both have second openings 591, which are located on the third side 53. The first branch 59 connecting the second on / off valve 7 may not have a second opening 591.

[0055] In some embodiments, such as Figure 3 and Figure 4 As shown, the intermediate gas path also includes a second main path 510, a second branch path 511 and a third branch path 512, which facilitates the connection between the corresponding solenoid valve and the equipment interface 5121.

[0056] The second main channel 510 extends in a straight line along the first direction X, with one end forming a third opening 5101 on the fourth side 54 of the valve plate 5. A third sealing element 5102 is provided on the third opening 5101. The third sealing element 5102 is a threaded plug. The first side 51 and the fourth side 54 are arranged opposite each other. Specifically, the first main channel 58 and the second main channel 510 are arranged along the second direction Y and have a height difference in the third direction Z. For example, the distance between the second main channel 510 and the first end face 55 is smaller than that between the first main channel 58 to avoid interference.

[0057] In addition, multiple second branches 511 are sequentially arranged along the first direction X. One end of each second branch 511 connects to the second main line 510, and the other end connects to the second valve interface b of the first end face 55. Each second valve interface b is connected to the second valve port of the third on / off valve 8 and the second valve port of the fourth on / off valve 9, respectively. One end of the third branch 512 connects to the second main line 510, and the other end connects to the equipment interface 5121. Furthermore, at the third on / off valve 8 and the fourth on / off valve 9, the second branch 511 and the first branch 59 connected to the same solenoid valve can be located on the same side of the first main line 58 and arranged sequentially along the first direction X to avoid interference. At the same time, the arrangement is clear and easy to process.

[0058] In some embodiments, such as Figure 3 and Figure 4 As shown, an air inlet 561 is provided on the first side 51, an equipment interface 5121 is provided on the second side 52, and an air vent 571 is provided on the third side 53. An air inlet connector 562 is fixedly provided on the air inlet 561, an equipment connector 5122 is fixedly connected to the equipment interface 5121, and an air vent connector 572 is fixedly connected to the air vent 571. At this time, the above three connectors are respectively provided on the sides of the valve plate 5 in different directions for easy differentiation, and the connectors protrude from the valve plate 5 for easy connection with the main air tank 10 and the cylinder.

[0059] In addition to the aforementioned solenoid valve assembly, this invention also provides a pneumatic component, which includes a solenoid valve assembly. Specifically, the solenoid valve assembly can be any of the solenoid valve assemblies provided in the above embodiments, and the beneficial effects can be referred to the respective embodiments above. The pneumatic component can be applied to fitness equipment.

[0060] like Figure 1 , Figure 6 and Figure 7 As shown, the pneumatic assembly includes a cylinder, a main air tank 10, and a solenoid valve assembly. The main air tank 10 is connected to the air inlet 561, and the cylinder is connected to the device interface 5121. The cylinder includes a piston 3, which has a built-in piston chamber or a piston groove 31 on its outer surface. By providing a piston chamber or piston groove 31 on the piston 3, a weight reduction effect is achieved, making it more suitable for scenarios requiring lightweight design.

[0061] Specifically, the solenoid valves in the solenoid valve assembly can be electrically connected to the controller, and the sensors on the cylinder can also be electrically connected to the controller. The controller can control the opening and closing of each solenoid valve based on the detection results of the sensors, thereby controlling each inflation or deflation process.

[0062] In some embodiments, the cylinder includes a cylinder body 2, a piston 3, and a cylinder guide rod 1.

[0063] The cylinder body 2 includes a cylinder barrel 23 and a first end cap 21 and a second end cap 22 respectively disposed at the two axial ports of the cylinder barrel 23. It should be noted that, in the embodiments of this application, axial direction specifically refers to the through direction or extension direction of the cylinder barrel 23.

[0064] The piston 3 is slidably connected inside the cylinder 2, specifically axially slidably connected to the cylinder 23, and sealingly fitted with the inner circumferential surface of the cylinder 23.

[0065] Cylinder guide rod 1 is fixed to the first axial side of piston 3 (reference). Figure 7 (Left side). The cylinder guide rod 1 extends axially out of the cylinder body 2. Specifically, the cylinder guide rod 1 extends out of the cylinder body 2 through the central through hole 211 on the first end cover 21. At this time, inside the cylinder body 2, the first side of the piston 3 is the rod chamber, and the second side (refer to...) Figure 7 The right side of the middle section is a rodless cavity.

[0066] The piston 3 has a piston groove 31 on its second side in the axial direction. Specifically, one groove is provided, but multiple grooves may be provided in other embodiments.

[0067] In this embodiment, the piston 3 has a piston groove 31 at the end away from the cylinder guide rod 1 in the axial direction. This will not affect the connection of the cylinder guide rod 1. At the same time, it is easy to process and can reduce the weight of the piston 3, thereby reducing the weight of the cylinder and contributing to weight reduction.

[0068] Additionally, in some embodiments, the cylinder guide rod 1 can be fixedly connected to the piston 3 via the piston groove 31. For example... Figure 7 As shown, the piston 3 is also equipped with a piston screw 4, and one end of the cylinder guide rod 1 is provided with a matching guide rod internal thread 12. The end 41 of the piston screw 4 is built into the piston groove 31, specifically with a certain distance in the axial direction from the groove opening of the piston groove 31. The end 41 of the piston screw 4 axially presses against the bottom of the groove of the piston groove 31. The screw 42 of the piston screw 4 is threaded to lock the guide rod internal thread 12.

[0069] During assembly, the piston screw 4 extends from the second side of the piston 3 into the piston groove 31. The screw 42 passes through the portion of the piston 3 located on the first side of the piston groove 31, inserts into the cylinder guide rod 1, and is threaded onto the internal thread 12 of the guide rod until the end 41 of the piston screw 4 presses against the bottom of the piston groove 31, completing the bolting connection. This process is convenient. Furthermore, the end 41 of the piston screw 4 is built into the piston groove 31, ensuring that the piston screw 4 is not exposed on the piston 3, thus avoiding impact damage between the piston screw 4 and the cylinder 2.

[0070] In some embodiments, such as Figure 7 As shown, an elastic washer 314 is also sandwiched between the end 41 of the piston screw 4 and the bottom of the piston groove 31.

[0071] In some embodiments, such asFigure 7 As shown, the piston 3 is also provided with buffer pads 36 on both ends of the piston 3 in the axial direction to avoid impact damage with the cylinder 2.

[0072] In some embodiments, such as Figure 6 As shown, to ensure the stability of the cylinder guide rod 1 connection, a piston sleeve 32 protrudes from the center of the first side end face of the piston 3 in the axial direction. Specifically, the piston sleeve 32 is integrally formed into the piston 3. One axial end of the cylinder guide rod 1 is inserted into the piston sleeve 32. At this time, in the radial direction, the piston screw 4 and the piston sleeve 32 clamp one axial end of the cylinder guide rod 1, which can improve the stability of the connection.

[0073] In some embodiments, such as Figure 7 As shown, the piston 3 has a connecting hole on the first axial side of the piston groove 31. The connecting hole connects the piston groove 31 and the piston sleeve 32. The screw 42 of the piston screw 4 extends into the piston sleeve 32 through the connecting hole. A sleeve sealing ring 321 is provided in the connecting hole. The sleeve sealing ring 321 is fitted on the outside of the screw 42 of the piston screw 4, and one end face of the cylinder guide rod 1 abuts against the sleeve sealing ring 321, which can ensure the sealing between the piston 3, the screw 42 and the cylinder guide rod 1. In addition, each sealing ring can be an O-ring.

[0074] In some embodiments, such as Figure 7 As shown, to further improve weight reduction, the cylinder guide rod 1 has a guide rod cavity 11 inside. Specifically, the guide rod cavity 11 is axially extended through one end near the piston 3, which facilitates machining. In addition, the guide rod internal thread 12 can be provided in the axial end region of the guide rod cavity 11 near the piston 3.

[0075] In some embodiments, the outer peripheral surface of the piston 3 is provided with a plurality of guide strips 35 arranged sequentially along the axial direction and a plurality of piston sealing rings 34 arranged sequentially along the axial direction to ensure the sealing effect between the piston 3 and the cylinder 23.

[0076] In some embodiments, such as Figure 7 As shown, a magnetic ring 33 is provided on the outer circumferential surface of the piston 3. On each side of the outer circumferential surface of the piston 3 along the axial direction of the magnetic ring 33, a piston sealing ring 34 and a guide strip 35 are sequentially arranged in a direction away from the magnetic ring 33. At this time, the guide strips 35 are located at both ends along the axial direction of the piston 3, which can increase the spacing. Combined with the weight reduction setting of the piston 3, it can reduce the moment of inertia, improve the responsiveness of the motion, and improve the comfort of the human body.

[0077] In some embodiments, such as Figure 7As shown, the piston groove 31 includes a small diameter hole 312 and a large diameter hole 311 in sequence along the direction away from the cylinder guide rod 1. A stepped surface facing the second side of the piston 3 is formed between the small diameter hole 312 and the large diameter hole 311. The shaft end port of the large diameter hole 311 away from the cylinder guide rod 1 has a retaining ring 313. Specifically, the outer periphery of the retaining ring 313 is connected to the hole wall of the large diameter hole 311, and the inner periphery is a through hole communicating with the piston groove 31.

[0078] At this time, the magnetic ring 33 is fitted onto the outside of the small-diameter hole 312. The piston seal ring 34 and guide strip 35 on the second side of the magnetic ring 33 are fitted onto the stepped surface in the piston groove 31 and the outside of the large-diameter hole 311. This allows for maximizing the size of the piston groove 31 while matching the inner diameters of the smaller magnetic ring 33 and the larger piston seal ring 34 and guide strip 35. In addition, the retaining ring 313, while ensuring the structural strength of the piston groove 31, can provide at least a partial mounting surface for the buffer pad 36.

[0079] In addition, to further improve the lightweighting of the cylinder, such as Figure 6 and Figure 7 As shown, on the cylinder body 2, the first end cap 21 and the second end cap 22 extend axially into the cylinder barrel 23 and are sealed to the cylinder barrel 23. At this time, the first end cap 21 and the second end cap 22 do not need to be connected by additional connecting rods and can be directly fixed to the cylinder barrel 23, which can further reduce the weight of the cylinder.

[0080] In some embodiments, cylinder 23 is a cylindrical tube; in other embodiments, it may be a square tube.

[0081] In some embodiments, such as Figure 6 and Figure 7 As shown, the cylinder 23 has a first chamber located between the piston 3 and the first end cap 21, which is a rod chamber. The cylinder 23 also has a second chamber located between the piston 3 and the second end cap 22, which is a rodless chamber. The first end cap 21 has a first channel 212, one end of which connects to the first chamber, and the other end connects to the first air inlet 231 on the cylinder 23. The second end cap 22 has a second channel 222, one end of which connects to the second chamber, and the other end connects to the second air inlet 232 on the cylinder 23. In this configuration, the first end cap 21 and the second end cap 22 extend a considerable length into the cylinder 23, improving the stability of the connection. The air inlet and outlet positions of the cylinder are located on the peripheral wall of the cylinder 23, ensuring smooth airflow into the cylinder.

[0082] In some embodiments, the first end cap 21 and the second end cap 22 are snapped and / or bolted to the cylinder 23 for easy connection. Specifically, after the first end cap 21 and the second end cap 22 are axially inserted into the cylinder 23, bolts extend radially through the outside of the cylinder 23 and are bolted to the first end cap 21 or the second end cap 22.

[0083] In some embodiments, such as Figure 7 As shown, at the first end cover 21, a buffer sealing ring 214 is provided at the end of the first channel 212 near the piston 3, a guide sleeve 216 is provided between the middle through hole 211 and the cylinder guide rod 1, a first end sealing ring 213 is provided between the first end cover 21 and the cylinder 23 for sealing, and a first hole retaining ring 215 is provided between the first end cover 21 and the cylinder 23 for limiting.

[0084] In some embodiments, such as Figure 7 As shown, at the second end cover 22, a second end sealing ring 223 is provided between the second end cover 22 and the cylinder 23 for sealing, and a second hole retaining ring 224 is provided between the second end cover 22 and the cylinder 23 for limiting. In addition, a cylinder tailstock 221 is provided on the side of the second end cover 22 away from the piston 3 in the axial direction, and the cylinder tailstock 221 is externally placed on the cylinder body 2.

[0085] In addition, the present invention also provides a fitness device, including the solenoid valve assembly or pneumatic component of any of the above embodiments, and the beneficial effects can also be referred to the above embodiments accordingly. Other structures of the fitness device can be referred to the prior art, and will not be described in detail here.

[0086] It should be noted that when an element is referred to as "fixing" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as "connecting" another element, it can be directly connected to the other element or there may be an intervening element. Furthermore, in the description of this invention, unless otherwise stated, "multiple," "multiple roots," and "multiple groups" mean two or more.

[0087] The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0088] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0089] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0090] The electromagnetic valve assembly, pneumatic components, and fitness equipment provided by this invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A solenoid valve assembly, characterized in that, It includes a valve plate (5), a first on / off valve (6), and a second on / off valve (7); the first on / off valve (6) and the second on / off valve (7) are both solenoid valves and are fixedly connected to the outside of the valve plate (5); The valve plate (5) is provided with an equipment interface (5121), an air inlet (561) and an air outlet (571), and an air inlet passage (56), an air outlet passage (57) and an intermediate air passage are provided inside the valve plate (5); The air inlet of the first on / off valve (6) is connected to the air inlet (561) through the air inlet passage (56), and the air outlet of the second on / off valve (7) is connected to the air outlet (571) through the air outlet passage (57). The first end (d) of the intermediate air passage is connected to the device interface (5121), and the second end (c) of the intermediate air passage is connected to the outlet end of the first on / off valve (6) and the inlet end of the second on / off valve (7).

2. The solenoid valve assembly according to claim 1, characterized in that, It also includes a third on-off valve (8) and a fourth on-off valve (9) respectively fixed outside the valve plate (5); The third shut-off valve (8) and the fourth shut-off valve (9) are both solenoid valves, and the flow rates are different when the third shut-off valve (8) and the fourth shut-off valve (9) are opened; The third on / off valve (8) and the fourth on / off valve (9) are connected in parallel to form a regulating branch, and then connected in series in the intermediate gas path.

3. The solenoid valve assembly according to claim 2, characterized in that, The first on / off valve (6), the second on / off valve (7), the third on / off valve (8), and the fourth on / off valve (9) are sequentially disposed on the first end face (55) of the valve plate (5) along the first direction (X).

4. The solenoid valve assembly according to claim 3, characterized in that, The intermediate gas path includes a first main path (58) and a first branch path (59); The first main road (58) extends in a straight line along the first direction (X), and one end of it forms a first opening (581) on the first side (51) of the valve plate (5), and a first sealing member (582) is provided on the first opening (581). Multiple first branch lines (59) are arranged sequentially along the first direction (X). One end of the first branch line (59) is connected to the first main line (58), and the other end is connected to the first valve interface (a) of the first end face (55). Each first valve interface (a) is connected to the outlet end of the first on-off valve (6), the inlet end of the second on-off valve (7), the first valve port of the third on-off valve (8), and the first valve port of the fourth on-off valve (9).

5. The solenoid valve assembly according to claim 4, characterized in that, At least a portion of the first branch (59) also has a second opening (591) extending to a second side (52) or a third side (53) of the valve plate (5), and a second sealing element (592) is provided on the second opening (591). The first side (51) is located between the second side (52) and the third side (53), and the second side (52) and the third side (53) are arranged opposite to each other.

6. The solenoid valve assembly according to claim 5, characterized in that, A device interface (5121) is provided on one of the second side (52) and the third side (53), and a vent (571) is provided on the other side. A device connector (5122) is fixedly connected to the device interface (5121), and a vent connector (572) is fixedly connected to the vent (571).

7. The solenoid valve assembly according to claim 3, characterized in that, The intermediate gas path includes a second main path (510), a second branch path (511), and a third branch path (512). The second main road (510) extends in a straight line along the first direction (X), and one end of it forms a third opening (5101) on the fourth side of the valve plate (5), and a third sealing element (5102) is provided on the third opening (5101). Multiple second branches (511) are arranged sequentially along the first direction (X). One end of the second branch (511) is connected to the second main road (510), and the other end is connected to the second valve port (b) of the first end face (55). Each second valve port (b) is connected to the second valve port of the third on-off valve (8) and the second valve port of the fourth on-off valve (9). One end of the third branch (512) is connected to the second main branch (510), and the other end is connected to the device interface (5121).

8. A pneumatic component, characterized in that, It includes a cylinder, a main air tank (10), and a solenoid valve assembly as described in any one of claims 1 to 7; the main air tank (10) is connected to the air inlet (561), and the cylinder is connected to the device interface (5121); the cylinder includes a piston (3), and the piston (3) has a built-in piston chamber or a piston groove (31) on its outer surface.

9. The pneumatic assembly according to claim 8, characterized in that, The cylinder includes a cylinder body (2) and a cylinder guide rod (1); the cylinder body (2) includes a cylinder barrel (23) and a first end cap (21) and a second end cap (22) respectively located at the two axial ends of the cylinder barrel (23); the first end cap (21) and the second end cap (22) extend axially into the cylinder barrel (23) and are sealed to the cylinder barrel (23); the piston (3) is slidably connected in the cylinder barrel (23), and the cylinder guide rod (1) is fixed to the piston (3) and extends out of the cylinder body (2) through the middle through hole (211) on the first end cap (21).

10. A fitness equipment, characterized in that, Includes the solenoid valve assembly as described in any one of claims 1 to 7.

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