Servo motor type resistance box and strength training machine

Abstract

The utility model relates to the technical field of fitness equipment, in particular to a servo motor type resistance box and a strength training machine, the servo motor type resistance box comprises a resistance box body, a force transmission part, an electric resistance source and a rolling round wheel, the electric resistance source comprises a servo gear motor and a winding wheel, and winding grooves are spirally distributed in the circumferential surface of the winding wheel; one end of the force transmission part is fixedly connected to the winding wheel and is wound in a single layer circle by circle along the winding groove, and the other end of the force transmission part penetrates out of the resistance box body through the fixed pulley; the gap between the rolling round wheel and the reel is matched with the outer diameter of the force transmission part, and the line where the force transmission part between the reel and the fixed pulley is located is the common tangent of the fixed pulley, the rolling round wheel and the reel. The limiting effect of the rolling round wheel on the force transmission part is utilized to ensure that the force transmission part strictly enters and exits from the winding groove, the force transmission part is prevented from being wound in a crossed mode on the winding wheel, accumulation or gaps are avoided, accurate resetting and drifting are avoided, the structure is simplified and practical, and meanwhile the force transmission part is suitable for strength training machines with different movement strokes.

Description

TECHNICAL FIELD

[0001] The utility model relates to body -building apparatus technical field, concretely relates to a kind of servo motor formula resistance box and strength training machine. BACKGROUND

[0002] The resistance source of the strength training machine on the market includes elastic resistance, water resistance, wind resistance, electromagnetic or electric resistance and weight variable counterweight, wherein the electric resistance training machine is auxiliary exercise equipment for adjusting the size of resistance by using motor, and the conventional electric resistance source mainly includes servo motor, transmission assembly, pulley set and transmission rope.A servo motor control system used on body-building equipment strength apparatus disclosed in Chinese published patent document (CN110898403A) is fixed with servo motor and speed reducer on rack, the output end of speed reducer is connected with transmission assembly composed of small pulley, belt and large pulley, one end of transmission belt is fixedly connected with operating rope, and the other end is fixedly connected with large pulley, and transmission belt is wound on set pulley.This structure has the following defects: first, the output shaft of speed reducer is connected with large pulley through belt pulley and belt transmission assembly, and large pulley is installed on resistance box through shaft, and the resistance box is easily shaken during clockwise and counterclockwise reciprocating rotation of large pulley during training, because the center of gravity is high;second, when the movement stroke of operating rope is large, then large pulley with appropriate diameter needs to be replaced to meet single-layer winding, and if multi-layer, then the pulling force radius of operating rope increases with the layer-by-layer release of operating rope from pulley, thereby leading to the increase of moment, and then the output torque of resistance source is constant, so that the operator can pull operating rope with smaller pulling force, and the expected exercise effect cannot be achieved.

[0003] To solve the above technical problems, a resistance module device is disclosed in Chinese published patent document (CN107096165A), which includes motor, screw winch, pulling rope, horizontal guide rail, guide wheel, connecting piece and wire clamping structure, one end of screw winch is connected with output shaft of motor, pulling rope is wound on screw winch, guide wheel can be completely engaged with screw thread of screw winch, rotation of screw winch drives guide wheel to walk in screw thread, thereby driving sliding block of horizontal guide rail to walk, and this design can ensure that pulling rope can be wound along screw thread of screw winch during stretching and contracting process, can prevent pulling rope from cross winding, and can make pulling rope stretch and contract in different directions, and can strictly ensure that pulling rope will not deviate from screw thread of screw winch, prevent pulling rope from cross winding and be suitable for strength training machine with different strokes.However, horizontal guide rail, sliding block, connecting piece, guide wheel and wire clamping structure need to be arranged, and the structure is relatively complex, and if these components are cancelled, pulling rope may deviate from screw thread, leading to uneven winding, accumulation or gap, and may not be accurately reset when tension is insufficient, resulting in position drift. SUMMARY

[0004] The utility model discloses a servo motor formula resistance box and strength training machine suitable for different motion stroke and guaranteeing force transmission component in and out spiral winding groove, prevent cross winding, appear accumulation or gap and accurate reset do not drift.

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

[0006] Servo motor formula resistance box, including resistance box body, force transmission component and the electric resistance source and the rolling round wheel of self-axis rotation in resistance box body inside, the electric resistance source includes servo deceleration motor and winding wheel, the winding wheel is installed on servo deceleration motor's output shaft and spiral arrangement has winding groove on winding wheel circumference, one end of force transmission component is fixedly connected on winding wheel and is along winding groove and is single layer winding, the other end of force transmission component passes through fixed pulley and goes out resistance box body, the axial direction of rolling round wheel and winding wheel is parallel with each other, and the clearance between rolling round wheel and winding wheel matches the outer diameter size of force transmission component, and the line of force transmission component between winding wheel and fixed pulley is the common tangent line of fixed pulley, rolling round wheel and winding wheel.

[0007] Preferably, the fixed pulley is mounted on the pulley support through a central shaft and a bearing, and the pulley support is fixedly installed in the resistance box body.

[0008] Preferably, a first pressing wheel is further rotatably connected to the pulley support, and the force transmission component passes through the gap between the first pressing wheel and the fixed pulley.

[0009] Preferably, the gap between the first pressing wheel and the fixed pulley is 1.0-1.2 times the outer diameter of the force transmission component.

[0010] Preferably, a flat-bottomed conical groove is arranged around the circumference of the fixed pulley.

[0011] Preferably, the force transmission component is a steel wire rope.

[0012] Preferably, the pitch P of the spiral formed by the winding of the force transmission component on the winding wheel and the outer diameter D of the force transmission component satisfy the following relationship: P = D + L, and L has a value ranging from 0 to 10 mm.

[0013] Preferably, the axial length of the contact surface of the rolling round wheel in contact with the force transmission component is not less than the axial distance of the wire length required for the maximum stroke of the force transmission component wound on the winding wheel.

[0014] The utility model also provides a strength training machine, which comprises an operating component and the above-mentioned servo motor formula resistance box, the extending end of the force transmission component extending out of the resistance box body is connected to the operating component, the servo deceleration motor is electrically connected to a servo driver, and the servo driver is electrically connected to a controller.

[0015] Preferably, the strength training machine is a thigh stretching training machine, the operation component is fixedly provided with a rope disc, the rope disc is provided with a concentric linear groove on the peripheral surface, the extending end of the force transmission component is wound around the concentric linear groove and fixedly connected to the rope disc, and the force transmission component is tangent to the concentric linear groove and fixedly provided with a second pressing wheel at the tangent position.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The servo motor type resistance box of the utility model is provided with the wire winding groove for winding the force transmission component on the peripheral surface of the wire winding wheel, and the rolling round wheel capable of rotating around the shaft is arranged on the side of the wire winding wheel, the gap between the rolling round wheel and the wire winding wheel matches the outer diameter size of the force transmission component, the force transmission component is arranged on the common tangent line of the fixed pulley, the rolling round wheel and the wire winding wheel, the limiting action of the rolling round wheel on the force transmission component is used to ensure that the force transmission component strictly enters and exits the wire winding groove, the force transmission component is prevented from being cross-wound, accumulated or having a gap in the wire winding wheel and from not drifting in precise resetting, the structure is simplified and practical compared with the guide mechanism of the prior art, and the utility model is suitable for the strength training machines with different movement strokes, such as the chest pushing machine in a sitting position, the rowing machine in a sitting position, the thigh stretching training machine, the high-position downward pulling machine, the adduction / abduction training machine, the abdominal curling machine and the shoulder pushing machine. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic view of the thigh stretching training machine of the utility model.

[0019] Figure 2 It is a structural schematic view of the servo motor type resistance box of the utility model.

[0020] Figure 3 It is a local enlarged view of the wire winding wheel and the rolling round wheel of the utility model.

[0021] Figure 4 It is an installation schematic view of the fixed pulley and the first pressing wheel of the utility model.

[0022] Marked in the figure: 101, seat; 1021, columnar body; 1022, swing arm; 1023, rope disc; 103, servo motor type resistance box; 10, resistance box body; 20, force transmission component; 31, servo speed reducer; 32, servo driver; 33, controller; 34, wire winding wheel; 41, fixed pulley; 42, first pressing wheel; 43, second pressing wheel; 44, rolling round wheel. DETAILED DESCRIPTION

[0023] In order to make the above features and advantages of the utility model more obvious and easy to understand, the following embodiments are taken, and the detailed description is made as follows in combination with the drawings.

[0024] AsFigure 1 The embodiment provides a strength training machine, in particular a thigh stretching training machine, which comprises a servo motor type resistance box 103, a frame, a seat 101 and a flexion and extension operating part installed on the frame, the flexion and extension operating part serving as an operating part of the thigh stretching training machine, the servo motor type resistance box 103 comprising a resistance box body 10, a force transmission part 20 and an electric resistance source located inside the resistance box body 10.

[0025] In the embodiment, as shown in the figure, the electric resistance source comprises a servo deceleration motor 31 and a winding wheel 34, the servo deceleration motor 31 is electrically connected with a servo driver 32, the servo driver 32 is electrically connected with a controller 33, the servo driver 32 is arranged inside the resistance box body 10 and the controller 33 adopts a touch screen controller and is arranged at a position convenient for the user to operate on the resistance box body 10. Figure 2 The winding wheel 34 is installed on the output shaft of the servo deceleration motor 31 and the winding groove is spirally arranged on the surface of the winding wheel 34. The force transmission part 20 is specifically a steel wire rope, one end of which is fixedly connected to the winding wheel 34 and is wound along the winding groove in a single layer by turns, the pitch P of the spiral formed by the winding of the force transmission part 20 on the winding wheel 34 and the outer diameter D of the force transmission part 20 satisfy the following relationship: P = D + L, L is in the range of 0 to 10 mm, specifically L is in the range of 0 to 2 mm or 0 or 2 mm. The fixed connection between one end of the force transmission part 20 and the winding wheel 34 is a conventional structure, for example, a rope knot is clamped in a rope hole, and the like, which will not be described here.

[0026] In addition, the operating part specifically comprises a columnar body 1021 and a swing arm 1022, one end of the swing arm 1022 is rotatably connected to the frame through a horizontal shaft and a bearing, and one end of the horizontal shaft is fixedly provided with a rope disc 1023, the columnar body 1021 is installed on the other end of the swing arm 1022 and corresponds to the user's calf to train the user to lift the columnar body 1021 with the calf during training. The surface of the rope disc 1023 is provided with a concentric line groove, the extending end of the force transmission part 20 is wound along the concentric line groove and fixedly connected to the rope disc 1023, the force transmission part 20 is tangent to the concentric line groove and is fixedly provided with a second pressing wheel 43 at the tangent position, the second pressing wheel 43 is fixedly installed on the frame or the resistance box body 10 through a support, and the force transmission part 20 is ensured to be retracted into the concentric line groove through the second pressing wheel 43.

[0027] A fixed pulley 41 is installed inside the resistance box body 10, the fixed pulley 41 is installed on a pulley support through a center shaft and a bearing, the pulley support is fixedly installed in the resistance box body 10, the other end of the force transmission part 20 passes out of the resistance box body 10 through the fixed pulley 41, and the extending end of the force transmission part 20 extending out of the resistance box body 10 is connected to the operating part through the rope disc 1023.

[0028] As Figure 4 shown, the pulley support is also rotatably connected with a first pressure roller 42 through a rotating shaft and a bearing, the direction of the rotating shaft is parallel to the axial direction of the winding wheel 34, the force transmission component 20 passes through the gap between the first pressure roller 42 and the fixed pulley 41, the gap between the first pressure roller 42 and the fixed pulley 41 is 1.0-1.2 times the outer diameter of the force transmission component 20, specifically, the first pressure roller 42 in this embodiment presses the force transmission component 20 against the wheel groove of the fixed pulley 41, the wheel groove is arranged around the circumferential surface of the fixed pulley 41 and is specifically a flat-bottomed conical groove, during the pulling-out or recovery process of the force transmission component 20, the first pressure roller 42 limits the in-out angle of the force transmission component 20 before and after the fixed pulley 41 unchanged, at the same time, the rolling of the first pressure roller 42 around the rotating shaft does not affect the transmission of the force transmission component 20.

[0029] In this embodiment, as Figure 3 shown, the servo motor type resistance box 103 further comprises a rolling round wheel 44, the rolling round wheel 44 is arranged close to the winding wheel 34, the servo deceleration motor 31 is installed in the resistance box body 10 through a motor base, a positioning shaft parallel to the axial direction of the winding wheel 34 is connected to the side of the motor base facing the winding wheel 34, the rolling round wheel 44 is coaxially installed on the positioning shaft through a rolling bearing so that the rolling round wheel 44 can rotate around the shaft and the axial direction of the rolling round wheel 44 is parallel to the axial direction of the winding wheel 34, thereby reducing the abrasion and resistance by rolling cooperation between the rolling round wheel 44 and the force transmission component 20 during training. Specifically, the rolling round wheel 44 adopts a nylon wheel, the gap between the rolling round wheel 44 and the winding wheel 34 matches the outer diameter size of the force transmission component 20, the axial length of the contact surface of the rolling round wheel 44 contacting the force transmission component 20 is not less than the axial distance of the wire length required for the maximum stroke of the force transmission component 20 wound on the winding wheel 34, and the wire line of the force transmission component 20 between the winding wheel 34 and the fixed pulley 41 is the common tangent line of the fixed pulley 41, the rolling round wheel 44 and the winding wheel 34, thereby using the limiting effect of the rolling round wheel 44 on the force transmission component 20 to ensure that the force transmission component 20 strictly enters and exits the winding groove, preventing the force transmission component 20 from being cross-wound, accumulated or having a gap on the winding wheel 34 and preventing the precise reset from drifting. The projection circle diameter of the contact surface of the rolling round wheel 44 at any axial position is the same.

[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, and 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 motor type resistance box, characterized in that: It includes a resistance box, a force transmission component, an electric resistance source located inside the resistance box, and a rolling wheel rotating around its own axis. The electric resistance source includes a servo geared motor and a winding wheel. The winding wheel is mounted on the output shaft of the servo geared motor and has winding grooves spirally arranged on its circumferential surface. One end of the force transmission component is fixedly connected to the winding wheel and wound in a single layer along the winding groove, while the other end of the force transmission component passes through the resistance box via a fixed pulley. The axial direction of the rolling wheel and the winding wheel are parallel to each other. The gap between the rolling wheel and the winding wheel matches the outer diameter of the force transmission component, and the line of the force transmission component between the winding wheel and the fixed pulley is the common tangent of the fixed pulley, the rolling wheel and the winding wheel.

2. The servo motor type resistance box according to claim 1, characterized in that: The fixed pulley is mounted on the pulley bracket via a central shaft and bearings, and the pulley bracket is fixedly installed inside the resistance box.

3. The servo motor type resistance box according to claim 2, characterized in that: The pulley bracket is also rotatably connected to a first pressure roller, and the force transmission component passes through the gap between the first pressure roller and the fixed pulley.

4. The servo motor type resistance box according to claim 3, characterized in that: The gap between the first pressure roller and the fixed pulley is 1.0-1.2 times the outer diameter of the force transmission component.

5. The servo motor type resistance box according to claim 1, characterized in that: The fixed pulley has a flat-bottomed conical groove arranged around its circumference.

6. The servo motor type resistance box according to claim 1, characterized in that: The force transmission component is a steel wire rope.

7. The servo motor type resistance box according to any one of claims 1 to 6, characterized in that: The pitch P of the helix formed by the force transmission component winding on the winding wheel and the outer diameter D of the force transmission component satisfy the following relationship: P=D+L, where L ranges from 0 to 10 mm.

8. The servo motor type resistance box according to claim 7, characterized in that: The axial length of the contact surface of the rolling wheel that contacts the force transmission component is not less than the axial distance of the wire length required for the maximum stroke of the force transmission component when it is wound on the winding wheel.

9. A strength training machine, characterized in that: The device includes an operating component and a servo motor-type resistance box as described in any one of claims 1 to 8, wherein the protruding end of the force transmission component extending from the resistance box body is connected to the operating component, the servo geared motor is electrically connected to a servo driver, and the servo driver is electrically connected to a controller.

10. The strength training machine according to claim 9, characterized in that: The strength training machine is a thigh extension training machine. The operating component is fixedly equipped with a rope reel. The rope reel has a concentric groove on its circumference. The extended end of the force transmission component is wound along the concentric groove and fixedly connected to the rope reel. The force transmission component is tangent to the concentric groove and a second pressure roller is fixedly installed at the tangent position.

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