Training instrument and pneumatic system thereof

Abstract

The utility model discloses training equipment and a pneumatic system thereof, and belongs to the technical field of fitness equipment. The pneumatic system comprises an air source assembly, a control assembly and an air cylinder. A piston rod of the air cylinder is in transmission connection with a pulling part of the training instrument. The control assembly comprises a proportional pressure regulating valve communicated with a rod cavity of the air cylinder and a throttling valve communicated with a rodless cavity of the air cylinder. The pneumatic system disclosed by the utility model is used on a training instrument, and can keep the balance weight constant and properly retract the inertia force so as to reduce the risk of muscle strain.

Description

Technical Field

[0001] The utility model relates to the technical field of training equipment, in particular to an air resistance type training equipment and a pneumatic system thereof. Background Art

[0002] Traditional fitness equipment mainly adjusts the intensity of fitness by adding or removing weights. The adjustment of weights is cumbersome and needs to be done manually according to different physical conditions and fitness requirements. It is time-consuming and laborious to manually unlock the safety lock and change the weights. At the same time, the weights have large inertia, and are prone to muscle strain during high-intensity fitness.

[0003] In recent years, air resistance fitness equipment has emerged to replace traditional fitness equipment. The original counterweight block is changed to a cylinder structure, and the counterweight resistance is adjusted by controlling the intake pressure. However, how to keep the cylinder force, that is, keep the counterweight force constant during training; at the same time, how to adjust the retraction inertia force of the cylinder piston rod to reduce the risk of muscle strain has become a technical problem for technicians in this field. Utility Model Content

[0004] To this end, the utility model proposes a training device and a pneumatic system thereof which can ensure a constant counterweight force and an appropriate retraction inertia force.

[0005] In view of the above technical problems, the utility model provides the following technical solutions:

[0006] A pneumatic system for a training device comprises: an air source component, a control component and a cylinder, wherein the piston rod of the cylinder is transmission-connected to a pulling part of the training device; the control component comprises a proportional pressure regulating valve connected to a rod chamber of the cylinder and a throttle valve connected to a rodless chamber of the cylinder.

[0007] In some embodiments of the present invention, the gas source assembly includes an air compressor and an air storage tank, and the compressed gas generated by the air compressor is stored in the air storage tank and then supplied to the cylinder.

[0008] In some embodiments of the utility model, the air source assembly further includes a filter, and the filter is located on the pipeline between the air compressor and the air storage tank, or the filter is located on the exhaust pipeline of the air storage tank.

[0009] In some implementations of the utility model, a pressure switch is provided on the gas storage tank, and the pressure switch sets the upper and lower pressure limits of the gas storage tank, and the air compressor is started and stopped according to the control signal of the pressure switch.

[0010] In some implementation modes of the present invention, the gas source assembly further includes a safety valve connected to the gas storage tank.

[0011] Some implementations of the utility model further include a muffler communicated with the rodless chamber of the cylinder, and the throttle valve is integrated on the muffler.

[0012] In some embodiments of the utility model, the control component also includes a two-position five-way reversing valve and a pressure reducing valve, the inlets of the pressure reducing valve and the proportional pressure regulating valve are respectively connected to the outlet of the gas storage tank, the outlet of the proportional pressure regulating valve is connected to the first inlet of the two-position five-way reversing valve, and the outlet of the pressure reducing valve is connected to the second inlet of the two-position five-way reversing valve, and when the two-position five-way reversing valve is in the initial first working position, the proportional pressure regulating valve is connected to the rod chamber of the cylinder; when the two-position five-way reversing valve is in the second working position, the pressure reducing valve is connected to the rod chamber of the cylinder.

[0013] A training device comprises a training frame, a pulling part and a weight part installed on the training frame, and a transmission part connected therebetween, wherein the weight part comprises the above-mentioned pneumatic system.

[0014] In some embodiments of the utility model, the trainer further includes a control unit, the control unit includes a display screen, the display screen is used to adjust the counterweight force parameter, and the control unit adjusts the outlet pressure of the proportional pressure regulating valve according to the counterweight force parameter.

[0015] Some embodiments of the present invention further include a position sensor for detecting the moving position of the piston rod, and the control unit controls the switching of the two-position five-way reversing valve according to the detection signal of the position sensor.

[0016] The technical solution of the utility model has the following technical effects compared with the prior art:

[0017] In the training device and its pneumatic system provided by the utility model, the control component includes a proportional pressure regulating valve connected to the rod chamber of the cylinder and a throttle valve connected to the rodless chamber of the cylinder. By giving an electrical signal to the proportional pressure regulating valve to control its outlet pressure, when the fitness person applies a pulling force to the pulling part of the training device, the pulling part drives the piston rod to move, and the pressure of the rod chamber of the cylinder can remain unchanged. When the fitness person pulls the pulling part of the training device to make the rod chamber chamber smaller, the pressure of the rod chamber increases, and the proportional pressure regulating valve responds at high speed to discharge the pressure to ensure that the counterweight remains unchanged. When the pulling part is released, since the exhaust port of the rodless chamber of the cylinder is provided with a throttle valve, the pressurized gas can be discharged slowly, which can prevent the fitness person from muscle strain. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which will help to understand the purpose and advantages of the present invention, wherein:

[0019] Figure 1A gas circuit system diagram of Example 1 of the pneumatic system of the training device provided by the utility model;

[0020] Figure 2 This is a gas circuit system diagram of Example 3 of the pneumatic system of the training device provided by the utility model. DETAILED DESCRIPTION

[0021] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] Example 1

[0026] like Figure 1 The figure shows a specific implementation of the pneumatic system of the training device of the utility model, which is used to controllably output a linear force to be used as a counterweight of the training device.

[0027] Specifically, the pneumatic system includes an air source component 10, a control component 20 and a cylinder 30, wherein the piston rod 31 of the cylinder 30 is transmission-connected to the pulling part of the training device; the control component 20 includes a proportional pressure regulating valve 21 connected to the rod chamber of the cylinder 30 and a throttle valve 22 connected to the rodless chamber of the cylinder 30.

[0028] In the above-mentioned pneumatic system, the electrical signal of the proportional pressure regulating valve 21 is controlled to achieve stepless control of the supply pressure of the cylinder 30 to ensure the stability of the counterweight; at the same time, since the rodless chamber of the cylinder 30 is connected to the throttle valve 22, when the piston rod 31 retracts, the piston rod 31 retracts at a reduced speed to reduce the inertial effect of the counterweight and avoid movement injuries.

[0029] Specifically, in order to reduce the noise of the pneumatic system during operation, the pneumatic system further includes a muffler 40 communicated with the rodless chamber of the cylinder 30 , and the throttle valve 22 is integrated on the muffler 40 .

[0030] Specifically, in an optional embodiment, the gas source assembly 10 includes an air compressor 11 and a gas storage tank 12, and the compressed gas generated by the air compressor 11 is stored in the gas storage tank 12 and then supplied to the cylinder 30. By arranging the gas storage tank 12 behind the pressure gas generating device (i.e., the air compressor 11) to realize gas supply, the gas source can provide a reliable and stable gas supply. Since the air flow may fluctuate or become unstable when the air compressor 11 generates gas, the gas storage tank 12 can absorb and release gas to balance the pressure changes in the gas source system, ensure that the gas pressure in the system remains stable, play a role in balancing the pressure, stabilize the counterweight pressure, and provide a better user experience.

[0031] Specifically, the gas source assembly 10 further includes a filter 13, such as Figure 1 As shown, the filter 13 is arranged between the air compressor 11 and the air storage tank 12, because the compressed air generated by the air compressor 11 contains dirt, water and oil. The dirt includes impurity particles such as microorganisms, dust, solid particles, rust, etc.; water includes water vapor, condensed liquid water, water mist, acid condensate; oil includes liquid oil, oil mist, hydrocarbon vapor, etc.; if untreated compressed air is used, the rear-end execution components will be polluted or damaged. Therefore, by setting the filter 13, the compressed air entering the air storage tank 12 can be purified, wherein the filter 13 adopts a compressed air filter 13.

[0032] Example 2

[0033] The utility model also provides a specific implementation of a training device, which includes a training frame, a pulling part installed on the training frame, a counterweight part, and a transmission part connected therebetween, wherein the counterweight part includes the pneumatic system described in Example 1.

[0034] The training device further comprises a control unit, wherein the control unit comprises a display screen, wherein the display screen is used to adjust the weight-balancing force parameter, and the control unit adjusts the outlet pressure of the proportional pressure regulating valve 21 according to the weight-balancing force parameter.

[0035] Before exercising, the fitness personnel first set the counterweight pressure on the display screen. The control unit controls the electrical signal of the proportional pressure regulating valve 21 according to the counterweight force parameter, so that the pressure of the rod chamber of the cylinder 30 remains unchanged. When the fitness personnel start exercising, they apply a pulling force to the pulling part, thereby driving the piston rod 31 to move. When the fitness personnel pull the pulling part of the training equipment to make the rod chamber smaller, the pressure of the rod chamber increases, and the proportional pressure regulating valve responds at high speed to discharge the pressure to ensure that the counterweight remains unchanged. When releasing, since the exhaust port of the rodless chamber of the cylinder 30 is provided with a throttle valve 22, muscle strain of the personnel can be prevented.

[0036] Example 3

[0037] like Figure 2 Another specific implementation of the pneumatic system of the training device of the present invention is shown. In this implementation, the air source component 10 and the control component 20 are different from those in Example 1.

[0038] Specifically, Figure 2 As shown, in the air source assembly 10, a one-way valve 16 is provided between the air compressor 11 and the air tank 12, and a pressure switch 14 is provided on the air tank 12. The pressure switch 14 sets the upper and lower pressure limits of the air tank 12. The air compressor 11 starts to generate compressed air and inflate the air tank. When the pressure rises to the upper pressure limit set by the pressure switch 14, the air compressor 11 stops working; when the pressure drops to the lower limit set by the pressure switch 14, the air compressor 11 starts and continues to inflate the air tank.

[0039] Specifically, Figure 2 As shown, the air source assembly 10 further includes a safety valve 15 connected to the air storage tank 12. When the pressure switch 14 or the circuit fails, the air compressor 11 cannot stop automatically, resulting in excessive pressure in the air storage tank 12, and the safety valve 15 automatically exhausts air.

[0040] Specifically, Figure 2 As shown, in this embodiment, the control component 20 also includes a two-position five-way reversing valve 23 and a pressure reducing valve 24. The pressure reducing valve 24 is connected in parallel with the proportional pressure regulating valve 21. The air inlets of both are connected to the outlet of the gas storage tank 12 through a three-way connector. The outlet of the proportional pressure regulating valve 21 is connected to the first inlet of the two-position five-way reversing valve 23, and the outlet of the pressure reducing valve 24 is connected to the second inlet of the two-position five-way reversing valve 23. The two-position five-way reversing valve 23 is in the first working position ( Figure 2When Y1 is energized), the proportional pressure regulating valve 21 is connected to the rod chamber of the cylinder 30; the two-position five-way reversing valve 23 is in the second working position ( Figure 2 When Y2 is energized, the pressure reducing valve 24 is connected to the rod chamber of the cylinder 30. By giving an electrical signal to the proportional pressure regulating valve 21, the pressure of the rod chamber of the cylinder 30 remains unchanged. When the fitness personnel pull the pulling part of the training equipment to make the rod chamber smaller, the pressure of the rod chamber increases, and the proportional pressure regulating valve responds at high speed to discharge the pressure to ensure that the counterweight remains unchanged. When releasing, the two-position five-way reversing valve 23 switches direction, and the pressure reducing valve 24 supplies air to the rod chamber of the cylinder 30. By adjusting the output pressure of the pressure reducing valve 24 and the opening of the throttle valve 22, the pressure can be kept constant during release and does not change with the change of the counterweight force, which can further prevent muscle strain.

[0041] Example 4

[0042] The utility model also provides a specific implementation of a training device, which includes a training frame, a pulling part installed on the training frame, a counterweight part, and a transmission part connected therebetween, wherein the counterweight part includes the pneumatic system described in Example 3.

[0043] The training device further comprises a control unit, wherein the control unit comprises a display screen, wherein the display screen is used to adjust the weight-balancing force parameter, and the control unit adjusts the outlet pressure of the proportional pressure regulating valve 21 according to the weight-balancing force parameter.

[0044] Specifically, it also includes a position sensor for detecting the moving position of the piston rod 31. The control unit controls the reversal of the two-position five-way reversing valve 23 according to the detection signal of the position sensor. The position sensor can be an infrared sensor installed on the training frame to detect the moving position information of the piston rod 31.

[0045] Before exercising, the fitness person first sets the counterweight pressure on the display screen. The control unit controls the electrical signal of the proportional pressure regulating valve 21 according to the counterweight force parameter. When the fitness person applies a pulling force to the pulling part, the piston rod 31 is driven to move. When the position sensor recognizes that the piston rod 31 rises, it outputs a first control signal, and the control unit controls the valve Y1 of the two-position five-way reversing valve 23 to be energized. The proportional pressure regulating valve 21 is connected to the rod chamber of the cylinder 30. When the fitness person pulls the pulling part of the training equipment to reduce the rod chamber, the pressure in the rod chamber increases, and the proportional pressure regulating valve responds at high speed to discharge the pressure to ensure that the counterweight remains unchanged. During release, the piston rod 31 retracts under the action of pressure. When the position sensor recognizes that the piston rod 31 has descended, it outputs a second control signal, and the pressure reducing valve 24 supplies air to the rod chamber of the cylinder 30. Since the exhaust port of the rodless chamber of the cylinder 30 is provided with a muffler 40 with a throttle valve 22, the pressure can be kept constant during release and does not change with the change of the counterweight force, thereby preventing muscle strain.

[0046] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present utility model.

Claims

1. A pneumatic system for a training device, characterized in that: include: An air source component, a control component and a cylinder, wherein the piston rod of the cylinder is transmission-connected to the pulling part of the training device; the control component comprises a proportional pressure regulating valve connected to the rod chamber of the cylinder and a throttle valve connected to the rodless chamber of the cylinder.

2. A pneumatic system for a training device according to claim 1, characterized in that: The gas source assembly includes an air compressor and an air storage tank. The compressed gas generated by the air compressor is stored in the air storage tank and then supplied to the cylinder.

3. A pneumatic system for a training device according to claim 2, characterized in that: The air source assembly also includes a filter, which is located on the pipeline between the air compressor and the air storage tank.

4. A pneumatic system for a training device according to claim 2, characterized in that: The gas storage tank is provided with a pressure switch, and the pressure switch sets the upper and lower pressure limits of the gas storage tank. The air compressor is started and stopped according to the control signal of the pressure switch.

5. A pneumatic system for a training device according to claim 2, characterized in that: The gas source assembly also includes a safety valve communicated with the gas storage tank.

6. A pneumatic system for a training device according to claim 1, characterized in that: It also includes a muffler communicated with the rodless chamber of the cylinder, and the throttle valve is integrated on the muffler.

7. A pneumatic system for a training device according to claim 2, characterized in that: The control component also includes a two-position five-way reversing valve and a pressure reducing valve, the inlets of the pressure reducing valve and the proportional pressure regulating valve are respectively connected to the outlet of the gas storage tank, the outlet of the proportional pressure regulating valve is connected to the first inlet of the two-position five-way reversing valve, and the outlet of the pressure reducing valve is connected to the second inlet of the two-position five-way reversing valve. When the two-position five-way reversing valve is in the first working position, the proportional pressure regulating valve is connected to the rod chamber of the cylinder; when the two-position five-way reversing valve is in the second working position, the pressure reducing valve is connected to the rod chamber of the cylinder.

8. A training device, comprising a training frame, a pulling part and a weight part mounted on the training frame, and a transmission part connected therebetween, characterized in that: The counterweight portion comprises the pneumatic system described in any one of claims 1-7.

9. A training device according to claim 8, characterized in that: The trainer also includes a control unit, which includes a display screen, and the display screen is used to adjust the weight-bearing force parameter. The control unit adjusts the outlet pressure of the proportional pressure regulating valve according to the weight-bearing force parameter.

10. A training device according to claim 9, characterized in that: It also includes a position sensor for detecting the moving position of the piston rod, and the control unit controls the reversing of the two-position five-way reversing valve according to the detection signal of the position sensor.

Images