CN219023144U - Knee-shoulder-forearm rotary muscle group strength training apparatus - Google Patents

Abstract

The utility model discloses a knee-shoulder-forearm rotary muscle group strength training apparatus, which comprises a seat, a knee joint training device, a shoulder joint training device and a forearm training device, wherein the knee joint training device, the shoulder joint training device and the forearm training device share one resistance mechanism through a switching device to realize the switching of three training modes. The training instrument can perform targeted anti-resistance training on the muscle strength of the rotary muscle groups of the knee joint, the shoulder joint and the forearm, and a user can conveniently switch the training of the rotary muscle groups of the knee joint, the shoulder joint and the forearm in the training process, even can train simultaneously, does not need to move to other instruments for training, and is simpler and more convenient to use.

Description

Knee-shoulder-forearm rotary muscle group strength training apparatus

Technical Field

The utility model relates to the technical field of sports fitness equipment, in particular to a knee-shoulder-forearm rotary muscle group strength training device.

Background

The strength quality is the most basic physical quality of the human body for maintaining exercise, is also the basis of other physical quality such as speed, endurance, sensitivity and the like, and has the important functions of promoting the physical health of common people and improving the athletic skills of athletes.

Muscle strength training has been an important role for the rest of fitness people and athletes, and the enhancement of muscle strength is an important means for the rest of fitness people to shape the body and for athletes to improve the athletic level. Currently, most of the muscular strength training in the field of body building and sports is more focused on training of the extensor group of joints, but neglects training of the rotary muscles of the reinforcing joints. Although the extensor muscle group of the joints is the most used, practical and functional muscle group of the human body, for some physical activities with a large range of joint movements, the rotary muscle group of the knee, the shoulder and the forearm has important effects on the stability of the overall action and the prevention of sports injury, however, few special devices for training the rotary muscle group of the joints are currently on the market; on the other hand, the related devices on the market have a single function, usually one function corresponds to one device. At present, no relevant report is available on instruments capable of performing targeted training on knee, shoulder and forearm rotary muscle groups on the market.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a knee-shoulder-forearm rotary muscle group strength training instrument which can effectively train rotary muscle groups of knee joints, shoulder joints and forearms so as to achieve the purposes of strengthening the rotary muscle group strength and preventing sports injury.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the knee-shoulder-forearm rotary muscle group strength training instrument comprises a seat, a knee joint training device, a shoulder joint training device and a forearm training device, wherein the knee joint training device, the shoulder joint training device and the forearm training device share one resistance mechanism through a switching device to realize the switching of three training modes; wherein:

the knee joint training device comprises a knee supporting mechanism, a pedal plate and a knee transmission mechanism which enables the pedal plate to rotate left and right by taking the position of the heel as a fulcrum, wherein the knee transmission mechanism comprises a roller guide rail pair arranged below the pedal plate, a knee step gear, a knee spline tooth shaft sleeve part meshed with the knee step gear, a knee steel wire wheel fixedly arranged on the knee spline tooth shaft sleeve part and a knee belt seat bearing for installing the knee step gear and the knee spline tooth shaft sleeve part; a knee transmission steel wire is wound on the knee steel wire wheel and is connected with the switching device through a guide piece;

the shoulder joint training device comprises a shoulder supporting mechanism, a horizontal rotating operation rod and a shoulder transmission mechanism for enabling the horizontal rotating operation rod to horizontally rotate, wherein the shoulder transmission mechanism comprises a shoulder step gear arranged below the horizontal rotating operation rod, a shoulder spline tooth shaft sleeve piece meshed with the shoulder step gear, a shoulder steel wire wheel fixedly arranged on the shoulder spline tooth shaft sleeve piece, and a shoulder belt seat bearing for installing the shoulder step gear and the shoulder spline tooth shaft sleeve piece, and the shoulder step gear is arranged on a gear shaft fixedly connected to the back of the horizontal rotating operation rod; the shoulder steel wire wheel is wound with a shoulder transmission steel wire, and the shoulder transmission steel wire is connected with the switching device through a guide piece;

the forearm training device comprises a forearm supporting seat and two forearm step gears which are mutually meshed and arranged on the forearm supporting seat, wherein a rotating handle is arranged on a gear shaft of one forearm step gear, and a forearm steel wire wheel is arranged on the other forearm step gear; the forearm wire wheel is wound with a forearm transmission wire, and the forearm transmission wire is connected with the switching device through a guide piece;

the resistance mechanism comprises a counterweight supporting frame and a counterweight block arranged on the counterweight supporting frame;

the switching device comprises a switching bracket, a switching bolt and a guide sliding block which is arranged in the switching bracket and can reciprocate in the switching bracket, wherein one end of the guide sliding block is fixed with a counterweight steel wire, and the other end of the counterweight steel wire is connected with a counterweight block in the resistance mechanism; three channels parallel to the reciprocating motion direction of the guide slide block are formed in the guide slide block, and three through holes which are respectively communicated with the three channels are formed in the switching support; a pull rod is arranged in each channel, a switching jack is formed in the same side of each pull rod, on which a counterweight steel wire is arranged, of each guide sliding block, and each switching plug pin is inserted into the corresponding switching jack on the corresponding pull rod after being inserted from the through hole on the switching bracket; the other side of the pull rod is respectively connected and fixed with steel wires from all training devices.

Further, the foot pedal consists of a front pedal, a rear pedal and a connecting rod for connecting the front pedal and the rear pedal. And further, the pedal baffles are preferably arranged on the left side and the right side of the rear pedal, so that the feet of a trainer are more stable.

Furthermore, the knee wire wheel and the shoulder wire wheel are both wire wheels with spline shafts at the centers and are respectively matched with spline gears in the knee spline tooth shaft sleeve and the shoulder spline tooth shaft sleeve, so that the knee wire wheel and the shoulder wire wheel can be respectively inlaid in the spline gears in the knee spline tooth shaft sleeve and the shoulder spline tooth shaft sleeve to be fixed.

Further, the roller guide rail pair comprises an annular rail and a sliding module arranged on the annular rail, and the sliding module realizes the movement of the sliding module on the annular rail through rollers.

Further, the horizontal rotary operation rod comprises a long operation rod, a limiting plug pin and a short operation rod sleeved in the long operation rod, a handle is arranged at one end, far away from the long operation rod, of the short operation rod, limiting insertion holes are formed in corresponding positions of the long operation rod and the short operation rod, and the length of the horizontal rotary operation rod is fixed after the limiting plug pin is inserted into the limiting insertion holes. More preferably, two elbow baffles are provided at the end of the long lever remote from the short lever to fix the elbows.

Further, the gear shaft of the forearm stepped gear to be provided with the rotary handle is selected to be a hexagonal shaft, and the installation hole of the rotary handle is correspondingly provided with a plum blossom hole, so that the rotary handle can be installed in a plurality of angles after being taken out.

Further, the guide piece is a fixed pulley. The guiding of the wire direction may be achieved by means of a fixed pulley or a plurality of fixed pulleys.

Further, the legs of the seat are preferably height adjustable legs, thereby allowing for adjustment of the seat height.

Furthermore, the number of the knee joint training device, the shoulder joint training device, the forearm training device, the switching device and the resistance mechanism is two, and the knee joint training device, the shoulder joint training device, the forearm training device, the switching device and the resistance mechanism are symmetrically arranged on the left side and the right side of the seat respectively.

From the aspect of structural integrity, it is preferable that the seat, the knee joint training device, the shoulder joint training device, the forearm training device, the switching device and the resistance mechanism are all mounted on one base, and the knee joint training device, the shoulder joint training device, the forearm training device, the switching device, the resistance mechanism and the like can be mounted on the base through corresponding supporting mechanisms.

Compared with the prior art, the utility model is characterized in that:

1. the training instrument provided by the utility model is functionally independent of the training of knee joints, shoulder joints and forearm rotary muscle groups, but the whole structure of the instrument is integrated, so that the occupied space can be saved.

2. The training instrument can perform targeted anti-resistance training on the muscle strength of the rotary muscle groups of the knee joint, the shoulder joint and the forearm, and a user can conveniently switch the training of the rotary muscle groups of the knee joint, the shoulder joint and the forearm in the training process, even can train simultaneously, does not need to move to other instruments for training, and is simpler and more convenient to use.

3. The training device is beneficial to body shaping of body building people and rehabilitation training of sports injury people, and improvement of athletic sports ability of athletes.

Drawings

FIG. 1 is a schematic view of a knee-shoulder-forearm rotary muscle group strength training apparatus according to one embodiment of the utility model.

Fig. 2 is a schematic top view of the knee joint training apparatus of the embodiment of fig. 1.

Fig. 3 is a schematic perspective view of a sliding module in the knee joint training apparatus according to the embodiment shown in fig. 1.

Fig. 4 is a schematic view showing an assembled structure of a sliding module in the knee joint training apparatus according to the embodiment shown in fig. 1.

Fig. 5 is a schematic top view of the shoulder joint training device of the embodiment of fig. 1.

Fig. 6 is an assembled structure view of the shoulder joint training device according to the embodiment shown in fig. 1.

Fig. 7 is a schematic view of a horizontal rotation lever in the shoulder training device according to the embodiment shown in fig. 1.

Fig. 8 is an assembled structural view of the forearm training device in the embodiment shown in fig. 1.

Fig. 9 is a southeast axial schematic view of a switching bracket in the switching device in the embodiment shown in fig. 1.

Fig. 10 is a schematic southwest axial side view of a switching bracket in the switching device in the embodiment shown in fig. 1.

Fig. 11 is a schematic perspective view of a guide slider in the switching device according to the embodiment shown in fig. 1.

Fig. 12 is a schematic perspective view of a pull rod in the switching device according to the embodiment shown in fig. 1.

The reference numerals in the figures are:

1 a guide rail supporting seat; 2, an arc-shaped guide rail; 3, sliding the module; 31 roller; 32 rectangular blocks; 33 fixing screws; a 34 nut; 4 knee seated bearings; 5 knee drive wires; 6 knee wire wheels; 7 knee step gear; 8, a pedal; 81 front pedal; 82 rear pedal; 83 pedal baffles; 9, a hollow supporting seat; 10 small supporting seats; 11 guides; 12 shoulder transmission steel wires; 13 shoulder bearing with seat; 14 shoulder step gear; 15 horizontally rotating the operating rod; 151 elbow baffles; 152 limit pins; 153 long lever; 154 short lever; 155 grip; 16 shoulder support frames; 17 pulley support columns; 18 forearm support base; a 19 bearing; 20 rotating the handle; a 21 hex head shaft; 22 switching the supporting seat; 23 switching means; 231 switching the rack; 232 switch pins; 233 channels; 234 through holes; 235 guide the slider; 236 a pull rod; 2361 switches jacks; 24 counterweight support frames; 25 balancing weights; a 26 seat; a base 27; 28 forearm drive wire; 29 forearm step gear; 30 forearm wire wheel.

Detailed Description

In order to better explain the technical scheme of the utility model, the utility model is described in further detail below with reference to the accompanying drawings, but the embodiment of the utility model is not limited thereto.

As shown in fig. 1, the knee-shoulder-forearm rotary muscle group strength training apparatus of the utility model comprises a base 27, and a seat 26, a knee joint training device, a shoulder joint training device, a forearm training device, a switching device 23 and a resistance mechanism which are arranged on the base 27 and used for a trainer to sit on for training, wherein the knee joint training device, the shoulder joint training device and the forearm training device share one resistance mechanism through the switching device 23 to realize switching of three training modes; the knee joint training device, the shoulder joint training device, the forearm training device, the switching device 23 and the resistance mechanism are two sets, and are symmetrically arranged on the left side and the right side of the seat 26 by taking the longitudinal central line of the seat 26 as the center. The base 27 serves as a base support structure for all other devices, providing stability in large area contact with the ground.

As shown in fig. 2, 3 and 4, the knee joint training device in the training apparatus of the present utility model comprises a knee supporting mechanism, a foot pedal 8 and a knee transmission mechanism which enables the foot pedal 8 to rotate left and right by taking the heel position as a fulcrum, wherein the knee transmission mechanism comprises a roller guide rail pair arranged below the foot pedal 8, a knee step gear 7, a knee spline tooth shaft sleeve which is meshed with the knee step gear 7, a knee wire wheel 6 fixedly arranged on the knee step gear 7 and a knee belt seat bearing 4 for installing the knee step gear 7 and the knee spline tooth shaft sleeve, and the knee step gear 7 is arranged on a gear shaft fixedly connected on the back of the heel of the foot pedal 8; the knee wire wheel 6 is wound with a knee wire 5, the knee wire 5 being connected to the switching device 23 via a guide 11, the knee wire 5 wheel being capable of pulling the knee wire 5 when rotated. Specific:

the supporting structure comprises a guide rail supporting seat 1, a hollow supporting seat 9 and a small supporting seat 10, wherein the guide rail supporting seat 1 provides supporting points for the arc-shaped guide rail 2, the hollow supporting seat 9 and the small supporting seat 10 provide supporting points for guide pieces 11, 3 guide pieces 11 are used in the knee joint training device, and the guide pieces 11 are fixed pulleys. The supporting surface of the guide rail supporting seat 1 is designed to be arc-shaped and is consistent with the radian of the arc-shaped guide rail 2, so that the support is provided for the arc-shaped guide rail 2. In the embodiment shown in fig. 1, the hollow support seat 9 has an upper support surface and a lower support surface, which are connected by four struts, and the interior is a hollow structure, and 2 of the 3 guides 11 are respectively disposed on the upper support surface and the lower support surface. The 3 fixed pulleys change the direction of the two force conduction, and finally the horizontal pulling force is changed into the vertical pulling force through the knee transmission steel wire 5 sleeved on the fixed pulleys, so that the balancing weight 25 in the resistance mechanism is pulled, and the resistance required by training is formed. The small supporting seat 10 is provided on the switching supporting seat 22 for placing the switching bracket 231.

The foot rest 8 provides support for the feet of the trainer. The foot pedal 8 is composed of a front pedal 81, a rear pedal 82, and a connecting rod connecting the front pedal 81 and the rear pedal 82. Preferably, the front pedal 81 has an arch structure, more preferably, pedal baffles 83 are arranged on the left side and the right side of the rear pedal 82 on the basis of the arch structure, so that the feet of a trainer can penetrate into the pedal 8 to stabilize the feet. The foot rest 8 is mounted in a position where the feet of the trainer are comfortably seated when sitting in the seat 26.

The roller guide rail pair comprises an annular rail and a sliding module 3 arranged on the annular rail, wherein the arc guide rail 2 is fixed on the guide rail supporting seat 1, the sliding module 3 is fixedly connected to the sole part of the pedal plate 8, in the embodiment shown in fig. 1, the sliding module 3 is fixedly connected to the front pedal 81 of the pedal plate 8, and the sliding on the annular rail is realized through rollers 31 arranged on the sliding module. The sliding module 3 is composed of a rectangular block 32, a fixing screw 33, a nut 34 and rollers 31 mounted on the rectangular block 32, wherein the nut 34 and the fixing screw 33 are used for fixing 4 rollers 31 on the rectangular block 32, and the 4 rollers 31 can be clamped on the arc-shaped guide rail 2 to roll, as shown in fig. 3. The 2 knee seated bearings 4 for mounting the knee step gear 7 and the knee spline shaft kit are all mounted on the base 27, and they are all outer spherical bearings which can bear axial and radial forces and can bear pressure from both feet. One of the knee-mounted bearings 4 is provided with a gear shaft which passes through the knee-step gear 7 and is fixedly connected to the back surface of the rear pedal 82 of the foot pedal 8, so that the foot pedal 8 and the knee-step gear 7 form linkage and the foot pedal 8 can freely rotate left and right by taking the heel position as a fulcrum. The other knee belt seat bearing 4 is internally provided with a knee spline tooth shaft sleeve and a knee wire wheel 6, the knee spline tooth shaft sleeve comprises a spline gear and a spline shaft, the center of the knee wire wheel 6 is provided with the spline shaft, the spline gear in the knee spline tooth shaft sleeve is meshed with a knee step gear 7 beside the spline gear, the center of the spline gear in the knee spline tooth shaft sleeve is of a spline structure and is matched with the spline shaft at the center of the knee wire wheel 6 above the spline gear, so that the knee wire wheel 6 can be inlaid in the spline gear to be fixed.

The trainer penetrates the pedal plate 8 with feet, when the pedal plate 8 horizontally rotates, the rotating movement taking the position of the heel as a fixed point can be realized under the help of the sliding module 3, and the knee step gear 7 below the heel rotates while the pedal plate rotates, so that the knee spline gear suite and the knee steel wire wheel 6 on the knee spline gear suite are driven to rotate, the switching device 23 is driven by the knee transmission steel wire 5 of the knee steel wire wheel 6, and the balancing weight 25 in the resistance mechanism is driven to operate by the balancing weight steel wire in the switching device 23, so that the training of the knee joint rotating muscle group is realized.

As shown in fig. 5 to 7, the shoulder joint training device in the training apparatus of the present utility model comprises a shoulder supporting mechanism, a horizontal rotation operation rod 15 and a shoulder transmission mechanism for horizontally rotating the horizontal rotation operation rod 15, wherein the shoulder transmission mechanism comprises a shoulder step gear 14 arranged below the horizontal rotation operation rod 15, a shoulder spline tooth shaft sleeve piece meshed with the shoulder step gear 14, a shoulder wire wheel fixedly arranged on the shoulder spline tooth shaft sleeve piece, and a shoulder belt seat bearing 13 for installing the shoulder step gear 14 and the shoulder spline tooth shaft sleeve piece, and the shoulder step gear 14 is arranged on a gear shaft fixedly connected on the back surface of the horizontal rotation operation rod 15; the shoulder wire wheel is wound with a shoulder wire 12, the shoulder wire 12 is connected to the switching device 23 via the guide 11, and the shoulder wire 12 wheel pulls the shoulder wire 12 when rotating. Wherein:

the shoulder support mechanism includes a shoulder support frame 16 and a pulley support column 17, which are both mounted on a base 27, wherein the shoulder support frame 16 provides support for the shoulder transmission mechanism and the pulley support column 17 provides support for the guide 11, which may be in particular a cylindrical or square configuration. In the shoulder training device, 2 guides 11 are used in total, and the guides 11 are specifically fixed pulleys. One of the pulley support columns 17 is disposed on the switching support seat 22 for placing the switching support 231. The guide 11 has the function of changing the direction of the conduction force of the shoulder wire 12, the guide 11 is consistent with the height of the shoulder wire 12 on the shoulder wire wheel, and the function of changing the direction of the conduction force of the shoulder wire 12 twice so as to change the vertical gravity of the balancing weight 25 into horizontal resistance, so that the balancing weight 25 can be pulled upwards when the instrument works.

The 2 shoulder-mounted bearings 13 for mounting the shoulder step gear 14 and the shoulder spline shaft kit are mounted on the shoulder support frame 16. One of the shoulder bearing 13 is provided with a gear shaft which passes through the shoulder step gear 14 and is fixedly connected to the back surface of the horizontal rotation operating rod 15, so that the horizontal rotation operating rod 15 horizontally rotates under the cooperation of the shoulder bearing 13 and the shoulder step gear 14 below. The other knee belt seat bearing 4 is internally provided with a shoulder spline tooth shaft sleeve and a shoulder wire wheel, the shoulder spline tooth shaft sleeve comprises a spline gear and a spline shaft, the center of the shoulder wire wheel is provided with the spline shaft, the spline gear in the shoulder spline tooth shaft sleeve is consistent in installation height with the shoulder step gear 14 beside the spline gear and meshed with the spline gear, the center of the spline gear in the shoulder spline tooth shaft sleeve is of a spline structure, and the spline gear is matched with the spline shaft at the center of the shoulder wire wheel above the spline gear, so that the shoulder wire wheel can be inlaid into the spline gear to be fixed.

The horizontal rotary lever 15 can be designed in a length-adjustable manner. In the embodiment shown in fig. 1, the horizontal rotary operating rod 15 includes a long operating rod 153, a limiting latch 152, and a short operating rod 154 sleeved in the long operating rod 153, a grip 155 is disposed at one end of the short operating rod 154 far away from the long operating rod 153, limiting insertion holes are formed at corresponding positions of the long operating rod 153 and the short operating rod 154, and a pull limiting latch is inserted into the limiting insertion holes to fix the length of the horizontal rotary operating rod 15, so that a trainer can conveniently adjust the length of the horizontal rotary operating rod 15 according to the arm length. Further, two elbow baffles 151 may be provided at an end of the long lever 153 remote from the short lever 154 for fixing the elbows. When the horizontal rotation operation rod 15 rotates horizontally by taking the gear shaft on the shoulder step gear 14 as the shaft, the shoulder step gear 14 rotates at the same angular speed and drives the spline gear in the shoulder spline gear shaft sleeve engaged with the shoulder step gear 14 to rotate, then drives the shoulder spline gear sleeve and the shoulder steel wire wheel thereon to rotate, then drives the switching device 23 through the shoulder transmission steel wire 12 of the shoulder steel wire wheel, and drives the balancing weight 25 in the resistance mechanism to operate through the counterweight steel wire in the switching device 23, so as to realize the training of the shoulder joint rotary muscle group.

The installation position of the horizontal rotation operation lever 15 is a place where a trainer sits on the seat 26 naturally and comfortably. From the standpoint of material, the horizontal rotation lever 15 is preferably hollow stainless steel.

As shown in fig. 8, the forearm training device in the training apparatus of the utility model comprises a forearm support base 18 and two forearm step gears 29 which are mounted on the forearm support base 18 and meshed with each other, wherein the forearm support base 18 is hollow cylindrical, and the bottom is mounted on a base 27 through screws to provide support for a plurality of parts in the forearm training device. The two forearm step gears 29 are mounted on the middle upper portion of the forearm support base 18, specifically, 4 circular bosses capable of embedding the bearing 19 are formed on the middle upper portion of the forearm support base 18, bearing holes are formed in the centers of the circular bosses, and in order to enable the two forearm step gears 29 to be meshed in the forearm support base 18, the distances between the centers of the four circular bosses at the top are designed to be just the distances which can be meshed after the gears are placed in the circular bosses. The top of the structure is evacuated to facilitate the installation of the forearm step gear 29. A rotary handle 20 is mounted on the gear shaft of one of the forearm step gears 29, and the rotary handle 20 is preferably mounted on the forearm step gear 29 through a hexagonal head shaft 21; the gear shaft of the other forearm step gear 29 is sleeved with a forearm wire wheel 30; the forearm wire wheel 30 is wound with a forearm wire 28, the forearm wire 28 being connected to the switching device 23 via the guide 11, the forearm wire 28 wheel being able to pull the forearm wire 28 when rotating. In the forearm training device 2 guides 11 are used in total, said guides 11 being in particular fixed pulleys. One of which is provided on the forearm support base 18 (the side panel of the forearm support base 18 is provided with a hole which can pass through the forearm transmission wire 28, the front panel is cut off to mount the fixed pulley), and the other of which is provided on the switching support base 22 for placing the switching support 231.

The rotating handle 20 in the forearm training device may be a hand-holding member, such as a cross bar, preferably the rotating handle 20 is formed by connecting a holding body, connecting protrusions at two ends and a cross beam, the center of the cross beam is perforated with a plum blossom hole, which allows the rotating handle to be rotated by a plurality of angles after being taken out and then inserted into the hexagonal head shaft 21, and the hexagonal head shaft 21 is connected and fixed with the forearm step gear 29 at the rear thereof, so that the vertical rotation of the rotating handle 20 is synchronized with the rotation of the forearm step gear 29. When the rotary handle 20 rotates, the force generated by rotation is transmitted to the forearm wire wheel 30 through the action of the two forearm step gears 29, the forearm transmission wire 28 of the forearm wire wheel 30 drives the switching device 23, and the counterweight 25 in the resistance mechanism is driven to operate through the counterweight wire in the switching device 23, so that the training of forearm rotary muscle group is realized.

The resistance mechanism comprises a counterweight support frame 24 and a counterweight block 25 arranged on the counterweight support frame 24; the balancing weight 25 can be switched with different weights according to the requirement.

The key function of the switching device 23 in the training apparatus of the present utility model is to integrate the resistance sources of the knee joint training device, the shoulder joint training device and the forearm training device, i.e. the three training devices share one resistance source, and the balancing weight 25 in the resistance mechanism is used as the resistance source. As shown in fig. 9 to 11, the switching device 23 in the training apparatus of the present utility model comprises a hollow switching bracket 231, three switching pins 232, and a guiding sliding block 235 disposed in the switching bracket 231 and capable of reciprocating in the switching bracket 231, wherein the switching bracket 231 is mounted on the base 27 through the switching support seat 22, one end of the guiding sliding block 235 is fixed with a counterweight steel wire, and the other end of the counterweight steel wire passes through the counterweight support frame 24 and is connected with the counterweight 25 thereon; three channels 233 parallel to the reciprocating direction of the guide slider 235 are formed in the guide slider 235, and three through holes 234 respectively communicating with the three channels 233 are formed in the switching bracket 231; a pull rod 236 is disposed in each of the channels 233, and the pull rod 236 is configured as shown in fig. 12. The knee joint training device, the shoulder joint training device and the forearm training device are connected with the resistance mechanism through three pull rods 236, specifically, switching jacks 2361 are formed on the same side of each pull rod 236, on which a counterweight steel wire is arranged, on the guide sliding block 235, and the switching bolts 232 are inserted from through holes 234 on the switching brackets 231 and then enter the switching jacks 2361 on the corresponding pull rods 236; while the other side of each pull rod 236 is connected and fixed to the knee wire 5, shoulder wire 12 and forearm wire 28 from the knee joint training device, shoulder joint training device and forearm training device, respectively. When the switching bolt 232 is inserted from the through hole 234 on the switching bracket 231 and then enters the switching jack 2361 on the corresponding pull rod 236, the knee joint training device, the shoulder joint training device or the forearm training device is locked, otherwise, the switching bolt 232 is taken out to unlock the corresponding training device.

The seat 26 in the exercise apparatus of the present utility model may be a conventional height-adjustable or non-adjustable seat 26. When the seat 26 is a height adjustable seat 26, the legs of the seat 26 may be designed as height adjustable telescoping rod legs to allow for adjustment of the height of the seat 26.

Claims (10)

1. The knee-shoulder-forearm rotary muscle group strength training apparatus comprises a seat (26), a knee joint training device, a shoulder joint training device and a forearm training device, and is characterized in that the knee joint training device, the shoulder joint training device and the forearm training device share one resistance mechanism through a switching device (23) to realize the switching of three training modes; wherein:

the knee joint training device comprises a knee supporting mechanism, a pedal plate (8) and a knee transmission mechanism which enables the pedal plate (8) to rotate left and right by taking the position of the heel as a fulcrum, wherein the knee transmission mechanism comprises a roller guide rail pair, a knee step gear (7), a knee spline tooth shaft sleeve part meshed with the knee step gear (7), a knee steel wire wheel (6) fixedly arranged on the knee spline tooth shaft sleeve part and a knee belt seat bearing (4) for installing the knee step gear (7) and the knee spline tooth shaft sleeve part, and the knee step gear (7) is installed on a gear shaft fixedly connected to the back of the heel of the pedal plate (8); the knee wire wheel (6) is wound with a knee transmission wire (5), and the knee transmission wire (5) is connected with a switching device (23) through a guide piece (11);

the shoulder joint training device comprises a shoulder supporting mechanism, a horizontal rotating operation rod (15) and a shoulder transmission mechanism for enabling the horizontal rotating operation rod (15) to horizontally rotate, wherein the shoulder transmission mechanism comprises a shoulder step gear (14) arranged below the horizontal rotating operation rod (15), a shoulder spline tooth shaft sleeve piece meshed with the shoulder step gear (14), a shoulder steel wire wheel fixedly arranged on the shoulder spline tooth shaft sleeve piece, and a shoulder belt seat bearing (13) for installing the shoulder step gear (14) and the shoulder spline tooth shaft sleeve piece, and the shoulder step gear (14) is installed on a gear shaft fixedly connected to the back of the horizontal rotating operation rod (15); the shoulder steel wire wheel is wound with a shoulder transmission steel wire (12), and the shoulder transmission steel wire (12) is connected with the switching device (23) through the guide piece (11);

the forearm training device comprises a forearm supporting seat (18) and two forearm step gears (29) which are arranged on the forearm supporting seat (18) and meshed with each other, wherein a rotating handle (20) is arranged on a gear shaft of one forearm step gear (29), and a forearm wire wheel (30) is arranged on the other forearm step gear (29); the forearm wire wheel (30) is wound with a forearm transmission wire (28), and the forearm transmission wire (28) is connected with the switching device (23) through the guide piece (11);

the resistance mechanism comprises a counterweight supporting frame (24) and a counterweight block (25) arranged on the counterweight supporting frame (24);

the switching device (23) comprises a switching support (231), a switching bolt (232) and a guide sliding block (235) which is arranged in the switching support (231) and can reciprocate in the switching support (231), one end of the guide sliding block (235) is fixed with a counterweight steel wire, and the other end of the counterweight steel wire is connected with a counterweight block (25) in the resistance mechanism; three channels (233) parallel to the reciprocating direction of the guide sliding block (235) are formed in the guide sliding block (235), and three through holes (234) respectively communicated with the three channels (233) are formed in the switching support (231); a pull rod (236) is arranged in the channel (233), a switching jack (2361) is arranged on the same side of the pull rod (236) as the counterweight steel wire arranged on the guide sliding block (235), and the switching plug (232) enters the switching jack (2361) on the corresponding pull rod (236) after being inserted from the through hole (234) on the switching bracket (231); the other side of the pull rod (236) is respectively connected and fixed with steel wires from each training device.

2. The knee-shoulder-forearm rotary muscle group strength training apparatus as claimed in claim 1, wherein the foot pedal (8) is composed of a front pedal (81), a rear pedal (82), and a connecting rod connecting the front pedal (81) and the rear pedal (82).

3. The knee-shoulder-forearm rotary muscle group strength training apparatus as claimed in claim 2, wherein the rear pedal (82) is provided with pedal baffles (83) on both left and right sides.

4. The knee-shoulder-forearm rotary muscle group strength training apparatus as claimed in claim 1, wherein the roller guide pair comprises a circular rail and a sliding module (3) arranged on the circular rail, and the sliding module (3) realizes the movement on the circular rail through rollers (31).

5. The knee-shoulder-forearm rotary muscle group strength training apparatus of claim 1, wherein the horizontal rotary operating rod (15) comprises a long operating rod (153), a limit plug (152) and a short operating rod (154) sleeved in the long operating rod (153), a grip (155) is arranged at one end of the short operating rod (154) far away from the long operating rod (153), limit insertion holes are formed in corresponding positions of the long operating rod (153) and the short operating rod (154), and the length of the horizontal rotary operating rod (15) is fixed after the limit plug is inserted into the limit insertion holes.

6. The knee-shoulder-forearm rotary muscle group strength training apparatus as recited in claim 5, wherein the long lever (153) is provided with two elbow baffles (151) at an end thereof remote from the short lever (154).

7. The knee-shoulder-forearm rotary muscle group strength training apparatus as recited in claim 1, wherein the rotary handle (20) is mounted to the forearm step gear (29) by a hex head shaft (21).

8. A knee-shoulder-forearm rotary muscle group strength training device as in claim 1, wherein the guide (11) is a fixed pulley.

9. The knee-shoulder-forearm rotary muscle group strength training apparatus as recited in any of claims 1-8, wherein the legs of the seat (26) are height adjustable legs.

10. The knee-shoulder-forearm rotary muscle group strength training apparatus according to any one of claims 1-8, wherein the number of knee joint training device, shoulder joint training device, forearm training device, switching device (23) and resistance mechanism is two, and are symmetrically arranged on the left and right sides of the seat (26).

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