Servo resistance weight box

Abstract

The utility model relates to the technical field of retraining equipment, and particularly discloses a servo resistance weight box which comprises a weight box body, a force transmission component and an electric resistance source, one end of the force transmission component is connected to the output end of the electric resistance source, and the other end of the force transmission component extends out of the weight box body. A force measurement sensor for measuring the tension value of the force transmission part is mounted in a transmission path of the force transmission part; the force measuring sensor is electrically connected with the controller, the controller controls the electric resistance source through the servo driver, and the electric resistance source has self-locking force. The electric resistance source has self-locking force and cannot be pulled by a force transmission part, a speed sensor or an acceleration sensor does not need to be arranged, the passive rotation mode of a traditional non-self-locking electric resistance source is changed, active operation is presented, and the body feeling of real balancing weight training is achieved; specific apparatus applications include, but are not limited to, a sitting-posture chest pushing machine, a sitting-posture rowing machine, a sitting-posture leg flexion and extension machine, a high-position pull-down machine, an adduction / abduction training machine, a mechanical crunch machine, a shoulder pushing machine and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of retraining equipment, and particularly relates to a servo resistance counterweight box. BACKGROUND

[0002] Chinese open patent literature (CN107233694A) discloses a novel intelligence capacity training device, a servo rotating motor is fixed on a rack, two-stage transmission assembly is connected on the motor shaft of the servo rotating motor, the servo rotating motor is connected with a driver and is controlled by a controller, a torsion sensor and a speed sensor installed on the servo rotating motor shaft are connected with the controller. A person operates an operation part (hand pulling, foot stepping, leg clamping and the like), pulls a belt, and the belt drives the motor shaft of the servo rotating motor to rotate through the two-stage transmission assembly. The servo rotating motor is preset with resistance by the controller, and the person operates the operation part to drive the servo rotating motor to rotate against the resistance. The intelligence capacity training device replaces the heavy counterweight block with the servo rotating motor, adjusts the muscle exercise resistance through an electronic watch, and is convenient to adjust the resistance.

[0003] However, the servo rotating motor must adopt a non-self-locking speed reducer, so that the winding wheel can be pulled by a person, and then the servo rotating motor is pulled, that is, the servo rotating motor is rotated by the person, and the rotation speed of the servo rotating motor is determined by the pulling speed of the person. The servo rotating motor is passively rotated, which leads to a difference in the sense of the actual counterweight block, and a speed sensor or an acceleration sensor must be provided. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a servo resistance counterweight box, which outputs resistance in an active operation mode.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme that:

[0006] The servo resistance counterweight box comprises a counterweight box body, a force transmission component, and an electric resistance source in the counterweight box body. One end of the force transmission component is connected to the output end of the electric resistance source, and the other end extends out of the counterweight box body. A force sensor for measuring the tension of the force transmission component is installed in the transmission path of the force transmission component. The force sensor is electrically connected to a controller. The controller controls the electric resistance source through a servo driver, and the electric resistance source has a self-locking force.

[0007] Preferably, the force transmission component is a steel wire rope.

[0008] Preferably, the electric resistance source is a speed-controllable rotary motion device or linear motion device with a servo system.

[0009] Preferably, the electric resistance source comprises an electric cylinder, a linear motor, and a rotary motor with a servo system.

[0010] Preferably, the electric resistance source comprises a servo rotary motor and a self-locking speed reducer matched with the output end of the servo rotary motor, a winding wheel is installed on the output end of the self-locking speed reducer, one end of the force transmission component is wound on the winding wheel, the force transmission component passes through a pulley block, the pulley block comprises a fixed pulley, and the servo rotary motor is electrically connected with the servo driver.

[0011] Preferably, the self-locking speed reducer is a worm and gear speed reducer.

[0012] Preferably, a first pressing wheel is rotatably installed in the counterweight box on the output side of the winding wheel, the force transmission component passes through between the first pressing wheel and the winding wheel, the gap between the first pressing wheel and the winding wheel matches the outer diameter size of the force transmission component, and the force transmission component passes through between the winding wheel and the fixed pulley is the common tangent line of the fixed pulley, the first pressing wheel and the winding wheel.

[0013] Preferably, the fixed pulley is installed on the pulley support through a central shaft and a bearing, and the force sensor is coaxially installed on the end of the central shaft of the fixed pulley.

[0014] Preferably, the type of the force sensor is a pressure sensor.

[0015] Preferably, a second pressing wheel is rotatably installed on the pulley support, and the force transmission component passes through between the second pressing wheel and the fixed pulley.

[0016] Compared with the prior art, the electric resistance source has the following beneficial effects:

[0017] The electric resistance source has self-locking force and cannot be pulled by the force transmission component, the required acceleration and speed are calculated according to the pulling force measured and calculated by the force sensor and the preset mass input by the user, so that the operation parameters of the electric resistance source are obtained, a speed sensor or an acceleration sensor is not required, the passive rotation mode of the traditional non-self-locking electric resistance source is changed to an active rotation mode, and the somatosensory of real weight block training is achieved.

[0018] The electric resistance source can be a speed-controllable rotating motion device such as a rotary motor and a linear motion device such as an electric cylinder and a linear motor, the servo system is a closed-loop control system composed of a controller, a feedback device and a driver, and specific instrument applications include but are not limited to a sitting chest pushing machine, a sitting rowing machine, a sitting leg flexion and extension machine, a high-position downward pulling machine, an adduction / abduction training machine, an abdominal curling machine, a shoulder pushing machine and the like. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is an internal structure schematic view of the resistance counterweight box.

[0020] Figure 2 is Figure 1 a local enlarged view in

[0021] Figure 3 is a schematic view of installation of the force sensor of the utility model at a fixed pulley.

[0022] Marked in the figure: 11, servo rotary motor; 12, self-locking speed reducer; 13, winding wheel; 14, servo driver; 15, controller; 16, first compression wheel; 17, force sensor; 18, fixed pulley; 19, second compression wheel; 20, force transmission component; 30, counterweight box. DETAILED DESCRIPTION

[0023] In order to make the above features and advantages of the utility model more obvious and easy to understand, the following specific examples are described in detail below, and the drawings are as follows.

[0024] As Figures 1 to 3 shown, the embodiment provides a servo resistance counterweight box, which comprises a counterweight box 30, a force transmission component 20 and an electric resistance source in the counterweight box 30.

[0025] In the embodiment, the electric resistance source adopts a speed-controllable rotary motion device with a servo system, specifically a combination of a servo rotary motor 11 and a self-locking speed reducer 12, the self-locking speed reducer 12 is specifically a worm gear speed reducer and is connected to the output end of the servo rotary motor 11 through a shaft coupling or flange transmission, the transmission ratio is 15, the output end of the self-locking speed reducer 12 is provided with a winding wheel 13 for winding the force transmission component 20, and the servo rotary motor 11 is electrically connected with a servo driver 14, the servo driver 14 is electrically connected with a controller 15, in use, the controller 15 controls the operation of the servo rotary motor 11 through the servo driver 14, the servo rotary motor 11 drives the self-locking speed reducer 12, and the output shaft of the self-locking speed reducer 12 drives the winding wheel 13 on the shaft to rotate, the winding wheel 13 drives the force transmission component 20 to pull as an electric resistance output. The controller 15 is arranged outside the counterweight box 30, and the servo driver 14 is arranged inside the counterweight box 30, the controller 15 has an input module for interaction with the user, and the user can input the preset mass of the electric resistance source through the input module, for example, 80 kg, etc., so as to conveniently adjust the resistance.

[0026] It should be noted that the electric resistance source of the embodiment can also adopt a speed-controllable linear motion device with a servo system, for example, a servo cylinder or a servo linear motor with self-locking force.

[0027] In the embodiment, the force transmission component 20 is a steel wire rope, one end of which is connected to a winding wheel 13 wound on the output end of an electric resistance source, and the other end extends out of the weight box 30 through a pulley block, and is connected to an operating part of a training device, the pulley block comprises a fixed pulley 18, a first pressing wheel 16 is rotatably installed in the weight box 30 on the output side of the winding wheel 13, the steel wire rope passes between the first pressing wheel 16 and the winding wheel 13, the gap between the first pressing wheel 16 and the winding wheel 13 matches the outer diameter size of the force transmission component 20, and the line where the force transmission component 20 passes between the winding wheel 13 and the fixed pulley 18 is the common tangent line of the fixed pulley 18, the first pressing wheel 16 and the winding wheel 13, and the winding wheel 13 is provided with a spiral groove on the surface thereof, and the first pressing wheel 16 can prevent the steel wire rope from being crossed and wound and can ensure that the steel wire rope does not deviate from the spiral groove when being retracted and extended.

[0028] The fixed pulley 18 is installed on a pulley support through a central shaft and a bearing, the pulley support is fixedly installed in the weight box 30, the force sensor 17 adopts a circularly configured pressure sensor, and the model specification can be purchased on the market, the force sensor 17 is coaxially installed on the end portion of the central shaft of the fixed pulley 18 and is fixed on the pulley support, the resultant force on the central shaft during the retraction and extension exercise is measured through the force sensor 17, and the real-time tension value of the steel wire rope is calculated in combination with the fixed included angle of the steel wire rope on the front and rear sides of the fixed pulley 18 and the feature that the tension at each position of the steel wire rope is consistent. The force sensor 17 is electrically connected with the controller 15, so as to input the tension signal to the controller 15, the controller 15 further performs mechanical analysis and calculation on the preset mass input by the user to obtain the required acceleration and required speed of the steel wire rope under the corresponding tension, so as to further obtain the required speed of the servo rotating motor 11 according to the transmission ratio and the radius of the winding wheel 13, drive the servo rotating motor 11 to actively operate at the required speed and provide resistance.

[0029] In addition, the pulley support is further rotatably provided with a second pressing wheel 19, the steel wire rope passes between the second pressing wheel 19 and the fixed pulley 18, the steel wire rope is pressed on the fixed pulley 18 through the second pressing wheel 19, the in-out angle of the steel wire rope before and after the fixed pulley 18 is limited to be unchanged, and the accuracy of the tension value calculation is ensured.

[0030] The basic principle, main features and advantages of the present application are shown and described above, and those skilled in the art should understand that the present application is not limited to the above embodiments, the above embodiments and descriptions in the specification are only to illustrate the principle of the present application, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application, and the scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A servo-resistance weight box, characterized by: The force transmission component is a steel wire rope.

2. The servo-resistance weight box of claim 1, wherein: The electric resistance source is a speed-controllable rotary motion device or linear motion device with a servo system.

3. The servo-resistance weight box of claim 1, wherein: The electric resistance source includes an electric cylinder, a linear motor and a rotary motor with a servo system.

4. The servo-resistance weight box of claim 1, wherein: The electric resistance source includes a servo rotary motor and a self-locking speed reducer matched with the output end of the servo rotary motor, the output end of the self-locking speed reducer is provided with a winding wheel, one end of the force transmission component is wound on the winding wheel, the force transmission component passes through a pulley block, the pulley block includes a fixed pulley, the servo rotary motor is electrically connected with the servo driver.

5. The servo-resistance weight box of claim 4, wherein: The self-locking speed reducer is a worm and gear speed reducer.

6. The servo-resistance weight box of claim 5, wherein: The first pressure roller is rotationally installed in the weight box on the output side of the winding wheel, the force transmission component passes between the first pressure roller and the winding wheel, the gap between the first pressure roller and the winding wheel matches the outer diameter size of the force transmission component, and the force transmission component passes between the winding wheel and the fixed pulley is a common tangent line of the fixed pulley, the first pressure roller and the winding wheel.

7. The servo-resistance weight box of claim 5, wherein: The fixed pulley is installed on the pulley support through a center shaft and a bearing, and the force sensor is coaxially installed on the end of the center shaft of the fixed pulley.

8. The servo-resistance weight box of claim 5, wherein: The type of the force sensor is a pressure sensor.

9. The servo-resistance weight box of claim 8, wherein: The pulley support is also rotationally installed with a second pressure roller, and the force transmission component passes between the second pressure roller and the fixed pulley.

10. The servo-resistance weight box of claim 8, wherein: ​

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