Double-rocker-arm double-rotation butterfly machine

Abstract

The invention discloses a double-rocker double-rotation butterfly machine, and relates to the field of indoor fitness facilities, the double-rocker double-rotation butterfly machine comprises a main frame group, and a main rocker group and an auxiliary rocker group which are movably connected to the main frame group, the main rocker group and the auxiliary rocker group are connected and linked through a middle connecting rod group, the middle connecting rod group is movably connected with a handle group, and the handle group is connected and linked with the main rocker group. Compared with an existing conventional butterfly machine body builder, turning rotation and movement of the upper limbs are achieved through transmission of the double rocker arms and a gear mechanism, rotation movement can be conducted while opening and closing actions are conducted, and actions of large muscle groups and joints of the upper limbs of the human body can be matched; the handle sleeve rotates and slides along the handle rod to be matched with actions of small muscle groups and joints of the hands, different chest clamping actions can be matched for multi-muscle group and multi-joint exercise, more control choices are provided for a user in the aspect of control, and the multi-degree-of-freedom chest clamping device has more advantages in the aspect of diversified exercise training requirements and use experience; and batch production and market popularization are easy, and good market value and social value are achieved.

Description

Technical Field

[0001] This invention belongs to the field of indoor fitness equipment, specifically relating to a double-rocker double-rotation butterfly machine. Background Technology

[0002] The butterfly machine is a popular piece of equipment for chest workout enthusiasts. It primarily works the pectoralis major by performing flyes. There are generally two types of butterfly machines: straight-arm and bent-arm. The straight-arm butterfly machine involves the user holding the handles with their arms straight to perform the fly motion, while the bent-arm machine involves bending the elbows and pushing inwards against the backrest. When using it for the first time, the user should keep their back firmly against the seat. Once they find the correct technique, they can lift their back off the seat, allowing the force to be concentrated more on the chest and also engaging the abdominal muscles.

[0003] The butterfly machine has two training modes: forward and reverse. By using the reverse butterfly machine or a standalone reverse butterfly machine, you can achieve a different training effect. The difference from the butterfly machine chest press is that the direction of force is reversed, just like the cable machine chest expansion. It can train the posterior deltoid while also taking care of the back muscles.

[0004] Currently available butterfly machines have several limitations in structural design and functionality. Most traditional butterfly machines use a single-degree-of-freedom motion mechanism, which can only achieve simple opening and closing movements, making it difficult to simulate the complex movement patterns of the human upper limbs. This limitation restricts the user's training effect and fails to fully activate different parts of the pectoralis major muscle and synergistic muscle groups.

[0005] In terms of mechanical structure, traditional butterfly machines mainly use a basic combination of side arm tubes and longitudinal adjustment components, with resistance provided by the cooperation of cable components and weight-bearing components. However, this structure makes it difficult to achieve multi-dimensional motion integration, and users cannot naturally connect rotational or extension movements when performing chest fly movements, limiting the naturalness and efficiency of training.

[0006] On the other hand, existing butterfly machines still have considerable room for improvement in terms of ergonomics. Most products lack adaptive adjustments for individual user differences, such as insufficient consideration of factors like arm length and shoulder joint rotation angle, which may lead to reduced training effectiveness or potential sports injury risks.

[0007] Therefore, how to provide a double-rocker double-rotation butterfly machine that is more in line with ergonomic compound movements has become a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0008] In order to solve the above-mentioned problems in the prior art, the present invention provides a double-rocker double-rotation butterfly machine with the technical features of using a double rocker arm mechanism and a gear mechanism to link the rotational motion of the two axes to make a change of direction, so that the exerciser can connect the forward extension movement while the upper limbs are adducting.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: A double-rocker double-rotation butterfly machine includes a main frame assembly, a main rocker arm assembly, a secondary rocker arm assembly, a central connecting rod assembly, and a handle assembly. The main frame assembly includes a main frame body, a counterweight mechanism, and an adjustable seat. The counterweight mechanism is located at the rear end of the main frame body, and the adjustable seat is located at the front end of the main frame body. The bottom of the main frame body is provided with a main connecting column, a secondary connecting column, a pulley system, a lifting pedal, and a steel wire rope. The pulley system, main connecting column, and secondary connecting column are arranged sequentially along the direction away from the counterweight mechanism on the frame. The main rocker arm assembly and the secondary rocker arm assembly are symmetrically installed on both sides of the main frame body. The main rocker arm assembly is rotatably connected to the main connecting column, and the secondary rocker arm assembly is rotatably connected to the secondary connecting column. The main rocker arm assembly and the secondary rocker arm assembly are connected and linked through the central connecting rod assembly. The central connecting rod assembly is movably connected to the handle assembly, and the handle assembly is connected and linked to the main rocker arm assembly. The counterweight mechanism is linked to the main rocker arm assembly through the steel wire rope and the pulley system. The lifting pedal is fixed on the frame above the main connecting column and the secondary connecting column.

[0010] Furthermore, the main rocker arm assembly is an L-shaped structure formed by fixing multiple steel columns together. The bottom end of the main rocker arm assembly is provided with a lower shaft seat, the middle part is provided with a middle shaft seat, and the top end is provided with an upper shaft seat. The lower shaft seat of the main rocker arm assembly is fitted onto the main connecting column of the main frame and locked with the pulley fitted onto the main connecting column, and rotates together around the main connecting column. The middle shaft seat and the upper shaft seat of the main rocker arm assembly are vertically concentric. The lower part of the upper shaft seat is provided with a fixed main bevel tooth for linkage with the handle assembly.

[0011] Furthermore, one end of the secondary rocker arm assembly is provided with a secondary shaft hole, and the other end of the secondary rocker arm is provided with a secondary shaft rod. The secondary shaft hole of the secondary rocker arm assembly is rotatably fitted onto the secondary connecting column of the main frame, and the top end of the secondary shaft rod is hinged to the middle connecting rod assembly.

[0012] Furthermore, the lower end of the middle connecting rod assembly is provided with a far-axis hole, and the other end is provided with a lower shaft. An upper shaft is provided at the top of the middle connecting rod assembly, and a horizontal shaft hole is provided below the upper shaft. The upper shaft and the lower shaft are respectively installed in the upper shaft seat and the middle shaft seat of the main rocker arm assembly, so that the middle connecting rod assembly rotates around the center line of the upper shaft seat and the middle shaft seat of the main rocker arm assembly. The far-axis hole of the middle connecting rod assembly is fitted onto the secondary shaft of the secondary rocker arm assembly, so that the middle connecting rod assembly rotates relative to the center line of the secondary shaft. Through the transmission of the middle connecting rod assembly, the movements of the main rocker arm assembly and the secondary rocker arm assembly are linked.

[0013] Furthermore, the handle assembly includes a horizontal shaft, a handle bevel gear, a handle bar, and a handle sleeve. The horizontal shaft of the handle assembly is rotatably installed in the horizontal shaft hole of the central connecting rod assembly. The handle bevel gear is installed at the end of the horizontal shaft and meshes with the main bevel gear for transmission. The handle bar is vertically fixed to the end of the horizontal shaft. The handle sleeve is slidably mounted on the handle bar and can slide and rotate on the handle bar along the center line. A limit block is provided at the top of the handle bar.

[0014] Furthermore, the adjustable seat includes a seat lifting frame and a seat. The seat lifting frame is tilted and fixed to the front end of the main frame. A cushion is provided on the top of the seat lifting frame, and the seat is installed on the seat lifting frame.

[0015] Furthermore, the lifting pedal includes a foot pedal, a base, a cylinder, and a scissor-type lifting mechanism; the scissor-type lifting mechanism is formed by a front lifting support rod and a rear lifting support rod hinged together by a central shaft, one side of the scissor-type lifting mechanism is hinged to the foot pedal and the base respectively, the lower end of the other side of the scissor-type lifting mechanism engages with a sliding groove set on the base through a roller, and the upper end engages with a sliding groove set on the bottom of the foot pedal through a roller; the cylinder body is hinged to a cylinder seat fixed on the main frame, and the end of its piston rod is hinged to a crossbar connecting the two sides of the scissor mechanism to drive the foot pedal to rise and fall.

[0016] Furthermore, a counterweight block is slidably arranged inside the counterweight mechanism, and a baffle is provided on the surface of the counterweight mechanism. The counterweight block is suspended by the wire rope and moves up and down under the traction of the main rocker arm assembly.

[0017] The present invention has the following significant beneficial effects: Compared to existing conventional butterfly machine fitness equipment, this invention uses a double rocker arm and gear mechanism to achieve directional rotation and movement of the upper limbs. It can perform rotational movements while opening and closing, matching the movements of the large muscle groups and joints of the upper limbs. The handle sleeves slide along the handlebars, matching the movements of the small muscle groups and joints of the hands. It can perform different chest-clamping movements targeting multiple muscle groups in the upper chest, anterior chest, and lower chest, as well as multi-joint exercises related to the upper limbs. Compared to existing butterfly machine trainers, this invention provides users with more control options, offering advantages in terms of diverse exercise training needs and user experience. This device has a simple structure, is easy to manufacture, and is easy to mass-produce and market, possessing significant market and social value. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall assembly relationship of the present invention.

[0019] Figure 2 This is a detailed exploded view of the structure of the present invention.

[0020] Figure 3This is a schematic diagram showing the motion state relationship of the various components of the present invention. Figure 1 .

[0021] Figure 4 This is a schematic diagram showing the motion state relationship of the various components of the present invention. Figure 2 .

[0022] Figure 5 This is a schematic diagram showing the motion state relationship of the various components of the present invention. Figure 3 .

[0023] Figure 6 This is a schematic diagram of the lifting pedal of the present invention.

[0024] Figure 7 This is a schematic diagram of the bird-flying chest-clamping motion of the present invention. Figure 1 .

[0025] Figure 8 This is a schematic diagram of the bird-flying chest-clamping motion of the present invention. Figure 2 .

[0026] Figure 9 This is a schematic diagram of the bird-flying chest-clamping motion of the present invention. Figure 3 .

[0027] Figure 10 This is a schematic diagram of the bird-flying chest-clamping motion of the present invention. Figure 4 .

[0028] Figure 11 This is a schematic diagram of the bird-flying chest-clamping motion of the present invention. Figure 5 .

[0029] Figure 12 This is a schematic diagram of the bird-flying chest-clamping motion of the present invention. Figure 6 .

[0030] Figure 13 This is a schematic diagram of the bird-flying chest-clamping motion of the present invention. Figure 7 .

[0031] Figure 14 This is a schematic diagram of the bird-flying chest-clamping motion of the present invention. Figure 8 .

[0032] Figure 15 This is a schematic diagram of the bird-flying chest-clamping motion of the present invention. Figure 9 .

[0033] Figure 16 This is a schematic diagram illustrating the reverse bird flight motion of the present invention. Figure 1 .

[0034] Figure 17 This is a schematic diagram illustrating the reverse bird flight motion of the present invention. Figure 2 .

[0035] Figure 18 This is a schematic diagram illustrating the reverse bird flight motion of the present invention. Figure 3 .

[0036] Figure 19 This is a schematic diagram illustrating the reverse bird flight motion of the present invention. Figure 4 .

[0037] Figure 20 This is a schematic diagram illustrating the reverse bird flight motion of the present invention. Figure 5 .

[0038] Figure 21 This is a schematic diagram illustrating the reverse bird flight motion of the present invention. Figure 6 .

[0039] Figure 22 This is a schematic diagram illustrating the matching and use of the lifting pedal of the present invention.

[0040] In the diagram: 1-Main frame assembly; 1.1-Main frame body; 1.2-Seat; 1.3-Seat lifting frame; 1.4-Main connecting column; 1.5-Pulley block; 1.6-Secondary connecting column; 1.7-Wire rope; 1.8-Counterweight; 1.9-Lifting pedal; 1.9.1-Foot pedal; 1.9.2-Base; 1.9.2.1-Foot pedal slide; 1.9.2.2-Base pivot; 1.9.3-Front lifting support rod; 1.9.4-Rear lifting support rod; 1.9.5-Central shaft; 1.9.6 1.9.7 Crossbar; 1.9.8 Cylinder seat; 1.9.9 Roller; 2 Main rocker arm assembly; 2.1 Lower shaft seat; 2.2 Middle shaft seat; 2.3 Main bevel gear; 2.4 Upper shaft seat; 3 Secondary rocker arm assembly; 3.1 Secondary shaft hole; 3.2 Secondary shaft rod; 4 Middle connecting rod assembly; 4.1 Remote shaft hole; 4.2 Lower shaft; 4.3 Horizontal shaft hole; 4.4 Upper shaft; 5 Handlebar assembly; 5.1 Handlebar bevel gear; 5.2 Horizontal shaft; 5.3 Handlebar lever; 5.4 Handlebar sleeve. Detailed Implementation

[0041] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0042] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "horizontal," "inner," "outer," and "one side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] Example 1

[0044] like Figure 1-6 As shown, this embodiment discloses a double-rocker double-rotation butterfly machine, including a main frame 1, a main rocker arm assembly 2, a secondary rocker arm assembly 3, a central connecting rod 4, and a handle assembly 5.

[0045] The main frame 1.1 of the main frame assembly 1 has a seat lifting frame 1.3 inclined at its front end. A cushion is mounted on top of the seat lifting frame 1.3, which is used to install and adjust the height of the seat 1.2. At the bottom of the main frame 1.1, along the direction away from the counterweight mechanism, are sequentially arranged a pulley block 1.5, a main connecting column 1.4, and a secondary connecting column 1.6, as well as a wire rope 1.7 and a lifting pedal 1.9. The rear end of the main frame 1.1 is fitted with a counterweight block 1.8, and a baffle 1.10 is installed on its surface. The counterweight block 1.8 is suspended by the wire rope 1.7 and is linked to the main rocker arm assembly 2 via the pulley block 1.5, moving up and down under the traction of the main rocker arm assembly.

[0046] In this embodiment, the main rocker arm assembly 2 is an L-shaped structure formed by fixing multiple steel columns together. The bottom of the main rocker arm assembly 2 is provided with a lower bearing seat 2.1, the middle with a central bearing seat 2.2, and the top with an upper bearing seat 2.4. The central bearing seat 2.2 and the upper bearing seat 2.4 of the main rocker arm assembly 2 are vertically concentric. A fixed main bevel gear 2.3 is provided at the lower part of the upper bearing seat. The secondary rocker arm assembly 3 has a secondary shaft hole 3.1 at one end and a secondary shaft rod 3.2 at the other end. The middle connecting rod assembly 4 has a distal shaft hole 4.1 at one end and a lower shaft 4.2 at the other end. An upper shaft 4.4 is provided at the top of the middle connecting rod assembly 4, and a transverse shaft hole 4.3 is provided below the upper shaft 4.4. One end of the handle assembly 5 is provided with a handle bevel tooth 5.1, which is fixed on the horizontal shaft 5.2. The other end of the handle assembly 5 is provided with a handle bar 5.3, on which a slidable handle sleeve 5.4 is fitted.

[0047] The main rocker arm assembly 2 and the auxiliary rocker arm assembly 3 are symmetrically installed on both sides of the main frame 1.1. The lower shaft seat 2.1 of the main rocker arm assembly 2 is fitted into the main connecting column 1.4 of the main frame 1.1 and locked together with the pulley 1.5 fitted into the main connecting column 1.4, rotating around the main connecting column 1.4. The auxiliary shaft hole 3.1 of the auxiliary rocker arm assembly 3 is fitted into the auxiliary connecting column 1.6 of the main frame 1.1 and can rotate around it. The upper shaft 4.4 and lower shaft 4.2 of the middle connecting rod 4 are respectively installed in the upper shaft seat 2.4 and the middle shaft seat 2.2 of the main rocker arm assembly 2. The middle connecting rod 4 can rotate around the center line of the upper shaft seat 2.4 and the middle shaft seat 2.2 of the main rocker arm assembly 2. The distal shaft hole 4.1 of the middle connecting rod 4 is fitted into the auxiliary shaft 3.2 of the auxiliary rocker arm assembly 3. The two can rotate relative to each other around the center line of the auxiliary shaft 3.2. The movements of the main rocker arm assembly 2 and the auxiliary rocker arm assembly 3 are linked through the transmission of the central connecting rod 4.

[0048] The horizontal shaft 5.2 of the handle assembly 5 is fitted into the horizontal shaft hole 4.3 of the central connecting rod 4. The handle assembly 5 can rotate around the center line of the horizontal shaft hole 4.3. The handle bevel gear 5.1 meshes with the main bevel gear 2.3 for transmission. Through the meshing transmission of bevel gear 2.3 and 5.1, the rotation of the handle 5 can drive the main rocker arm assembly 2. Under the motion constraint of the auxiliary rocker arm assembly 3, the counterweight 1.8 is pulled up and down through the pulley block 1.5 and the wire rope 1.7. A limit block is provided at the top of the handle rod 5.3, and the handle sleeve 5.4 can slide or rotate on the handle rod 5.3 along the center line of the handle rod 5.3.

[0049] like Figure 6 , 22As shown, the foot pedal 1.9.1 of the lifting pedal 1.9 has preset holes. When the foot pedal 1.9.1 is lowered to its lowest position, it is fitted onto the top of the auxiliary connecting column 1.6 and the lower axle seat 2.1 for limiting. The lifting pedal 1.9 has symmetrically arranged bases 1.9.2 on the left and right sides at the bottom. The bases 1.9.2 and cylinder seats 1.9.8 are fixedly installed on the lower support of the main frame 1.1. A cylinder 1.9.6 is rotatably installed on the cylinder seat 1.9.8 and fitted onto the crossbar 1.9.7. Front lifting support rods 1.9.3 are symmetrically arranged on the left and right sides at the bottom of the foot pedal 1.9.1. The rear lifting support rod 1.9.4 and the left and right lifting support rods are connected by the central shaft 1.9.5 and the crossbar 1.9.6. The rear end of the front lifting support rod 1.9.3 is mounted on the base pivot 1.9.2.2 and can rotate around it. The front end is equipped with a roller 1.9.9, which is rotatably mounted in the foot pedal groove 1.9.1.1. The rear end of the rear lifting support rod 1.9.4 is mounted on the foot pedal pivot 1.9.1.2 and can rotate around it. The front end is equipped with a roller 1.9.9, which is rotatably mounted in the base groove 1.9.2.1.

[0050] Operating mode:

[0051] The user operates the handle 5.4 to rotate the handle assembly 5 within the horizontal axis hole 4.3. Through the movement and rotation of the handle 5.4 on the handle bar 5.3, the user can adjust the hand position and force application method as needed, allowing for targeted training of different chest areas or reverse fly exercises when performing chest-clamping movements in conjunction with body posture. At this time, the movement of the handle bar 5.3 is a combination of two paths: 1. Rotating around the Z-axis with the lower shaft seat 2.1 of the main rocker arm assembly 2 as the axis, and the upper shaft seat 2.4 and the middle shaft seat 2.2 as moving points, with the vertical distance between them as the radius; 2. Rotating around the horizontal axis hole 4.3 as the axis. Figuratively speaking, the user operates the handle in a way that combines the traditional left-right opening and closing motion of a butterfly machine with a forward and backward pressing and lifting motion.

[0052] Example 2

[0053] like Figure 7-15 As shown, the motion posture of the double-rocker double-rotation butterfly machine in this embodiment combines the motion movements of the butterfly machine, the seated chest press machine, and the high-position flyer machine. Figure 7 The starting motion is a typical starting action for the butterfly machine. Figure 8 The arm extension and downward press is an intermediate movement during the transition between actions. During this transition, the user can adjust their posture as needed, such as... Figure 9 , 10 Figure 11 shows a similar arm-extending forward push motion to a seated chest press machine. Because the handle 5.4 moves independently along the handle bar 5.3, the user can flexibly extend upwards or downwards according to their own height and arm span. Figure 12 , 13 This is a chest press-down movement similar to the high fly. Figure 14 , 15 The demonstration shows that even when the handlebar is pressed forward and downward, the user can still flexibly switch from a bent arm to a straight arm and can also perform wrist flipping movements relatively freely.

[0054] Example 3

[0055] like Figure 16-21 As shown, the dual-arm, dual-handle butterfly machine in this embodiment also provides a reverse fly exercise. During the exercise, by moving the handles, the user can freely adjust the height of their hands to train different muscle groups, such as... Figure 19 , 20 As shown, the rotation of the handlebars provides users with greater arm extension and an upward chest-lifting angle and space.

[0056] Example 4

[0057] like Figure 22 As shown, when performing the reverse bird flight motion, if the user is short or uses a specific movement to generate force, the height of the foot pedal 1.9.1 can be adjusted to suit the foot placement and force application requirements. The lifting pedal 1.9 is a detachable structure, facilitating equipment inspection and maintenance.

[0058] The method of using this invention is as follows: Method 1: Extending arm and pressing down. For example... Figure 7 , 8 As shown in Figure 11, the user performs an arm-straightening downward press exercise. At this time, the handlebar sleeve 5.4 is located at the far end of the handlebar 5.3. In this mode of use, the lower chest muscles, shoulders, and upper arms can be well exercised.

[0059] Method 2: Arm-bent chest press. (Example) Figure 7 , 9 As shown in Figure 13, the user performs a chest fly exercise with their elbows bent. During the exercise, the user's elbows can be suspended in the air or rest on the handle bar 5.3 for exertion, similar to a bent-arm butterfly machine. However, the latter half of the bent-arm movement is a downward pressing motion, similar to a high fly on a cable machine, which is more effective than the chest fly exercise on a regular butterfly machine. In this mode of use, the chest fly exercise can achieve better training for the lower chest.

[0060] Method 3: Wrist-flipping chest-clamping style. (Example) Figure 7 , 12 As shown in Figure 14, when the user consciously flips their wrist so that their palm faces slightly upward to perform a chest-clamping motion, it can effectively train the upper chest muscles.

[0061] Method 4: Chest clip conversion. For example... Figure 13 ,14 As shown in Figure 15, when the user operates to a specific position and posture, they consciously perform wrist rotation and arm clamping / opening transitions to stimulate different muscle groups in the chest, achieving a more comprehensive chest muscle group workout.

[0062] Usage Method 5: Hybrid. For example... Figure 7-15 As shown, users can freely decide the degree of arm bending, palm orientation, and torso position when performing chest presses based on their personal training plan or the comfort of their posture.

[0063] Method 6: Reverse Flying Bird Style. For example... Figure 16-22 As shown, when performing the reverse fly exercise, the adjustable features of this equipment allow users to freely control the degree of arm bending, palm orientation, and torso position. The adjustable footrest height also solves the problem of foot support and force application for some people when performing the exercise.

[0064] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A double-rocker double-rotation butterfly machine, characterized in that, The system includes a main frame assembly, a main rocker arm assembly (2), a secondary rocker arm assembly (3), a central connecting rod assembly (4), and a handle assembly (5). The main frame assembly includes a main frame body (1), a counterweight mechanism, and an adjustable seat. The counterweight mechanism is located at the rear end of the main frame body (1), and the adjustable seat is located at the front end of the main frame body (1). The bottom of the main frame body (1) is provided with a main connecting column (1.4), a secondary connecting column (1.6), a pulley assembly (1.5), a lifting pedal (1.9), and a wire rope (1.7). The pulley assembly (1.5), the main connecting column (1.4), and the secondary connecting column (1.6) are arranged sequentially along the direction away from the counterweight mechanism. The main rocker arm assembly (2) and the secondary rocker arm assembly (3) are connected in a series of steps. 3) The main rocker arm assembly (2) is symmetrically installed on both sides of the main frame (1). The main rocker arm assembly (2) is rotatably connected to the main connecting column (1.4). The auxiliary rocker arm assembly (3) is rotatably connected to the auxiliary connecting column (1.6). The main rocker arm assembly (2) and the auxiliary rocker arm assembly (3) are connected and linked through the middle connecting rod assembly (4). The middle connecting rod assembly (4) is movably connected to the handle assembly (5). The handle assembly (5) is connected and linked to the main rocker arm assembly (2). The counterweight mechanism is linked to the main rocker arm assembly (2) through the wire rope (1.7) and the pulley assembly (1.5). The lifting pedal (1.9) is fixed on the frame above the main connecting column (1.4) and the auxiliary connecting column (1.6).

2. The double-rocker double-rotation butterfly machine according to claim 1, characterized in that, The main rocker arm assembly (2) is an L-shaped structure formed by fixing multiple steel columns. The bottom end of the main rocker arm assembly (2) is provided with a lower shaft seat (2.1), the middle part is provided with a middle shaft seat (2.2), and the top end is provided with an upper shaft seat (2.4). The lower shaft seat (2.1) of the main rocker arm assembly (2) is fitted onto the main connecting column (1.4) of the main frame (1) and locked with the pulley fitted onto the main connecting column (1.4), and rotates together around the main connecting column (1.4). The middle shaft seat (2.2) and the upper shaft seat (2.4) of the main rocker arm assembly (2) are vertically concentric. The lower part of the upper shaft seat (2.4) is provided with a fixed main bevel tooth (2.3) for linkage with the handle assembly (5).

3. The double-rocker double-rotation butterfly machine according to claim 2, characterized in that, One end of the secondary rocker arm assembly (3) is provided with a secondary shaft hole (3.1), and the other end of the secondary rocker arm assembly (3) is provided with a secondary shaft rod (3.2) facing upward. The secondary shaft hole (3.1) of the secondary rocker arm assembly (3) is rotatably fitted onto the secondary connecting column (1.6) of the main frame body (1), and the top end of the secondary shaft rod (3.2) is hinged to the middle connecting rod assembly (4).

4. The double-rocker double-rotation butterfly machine according to claim 3, characterized in that, The lower end of the middle connecting rod assembly (4) is provided with a far-axis hole (4.1) and the other end is provided with a lower shaft (4.2). An upper shaft (4.4) is provided on the top of the middle connecting rod assembly (4). A horizontal shaft hole (4.3) is provided below the upper shaft (4.4). The upper shaft (4.4) and the lower shaft (4.2) are respectively installed in the upper shaft seat (2.4) and the middle shaft seat (2.2) of the main rocker arm assembly (2), so that the middle connecting rod assembly (4) rotates around the center line of the upper shaft seat (2.4) and the middle shaft seat (2.2) of the main rocker arm assembly (2). The far-axis hole (4.1) of the middle connecting rod assembly (4) is fitted onto the secondary shaft (3.2) of the secondary rocker arm assembly (3), so that the middle connecting rod assembly (4) rotates relative to the center line of the secondary shaft (3.2). Through the transmission of the middle connecting rod assembly (4), the actions of the main rocker arm assembly (2) and the secondary rocker arm assembly (3) are linked.

5. A double-rocker double-rotation butterfly machine according to claim 4, characterized in that, The handle assembly (5) includes a horizontal shaft (5.2), a handle bevel gear (5.1), a handle bar (5.3), and a handle sleeve (5.4). The horizontal shaft (5.2) of the handle assembly (5) is rotatably installed in the horizontal shaft hole (4.3) of the middle connecting rod assembly (4). The handle bevel gear (5.1) is installed at the end of the horizontal shaft (5.2) and meshes with the main bevel gear (2.3) for transmission. The handle bar (5.3) is vertically fixed at the end of the horizontal shaft (5.2). The handle sleeve (5.4) is slidably disposed on the handle bar (5.3) and can slide and rotate on the handle bar (5.3) along the center line of the handle bar (5.3). A limit block is provided at the top of the handle bar.

6. The double-rocker double-rotation butterfly machine according to claim 1, characterized in that, The adjustable seat includes a seat lifting frame and a seat (1.2). The seat lifting frame is tilted and fixed at the front end of the main frame (1). A cushion is provided on the top of the seat lifting frame. The seat (1.2) is installed on the seat lifting frame.

7. A double-rocker double-rotation butterfly machine according to claim 1, characterized in that, The lifting pedal (1.9) includes a foot pedal (1.9.1), a base (1.9.2), a cylinder (1.9.6), and a scissor lift mechanism; the scissor lift mechanism is formed by hinged front lifting support rod (1.9.3) and rear lifting support rod (1.9.4) via a central shaft (1.9.5), one side of the scissor lift mechanism is hinged to the foot pedal (1.9.1) and the base (1.9.2), respectively, and the other side of the scissor lift mechanism... The lower end of one side engages with a groove on the base (1.9.2) via a roller (1.9.9), and the upper end engages with a groove on the bottom of the foot pedal (1.9.1) via a roller (1.9.9); the cylinder body of the cylinder (1.9.6) is hinged to the cylinder seat (1.9.8) fixed on the main frame (1), and the end of its piston rod is hinged to the crossbar (1.9.7) connecting the two sides of the scissor mechanism to drive the foot pedal (1.9.1) to rise and fall.

8. A double-rocker double-rotation butterfly machine according to claim 1, characterized in that, The counterweight mechanism has a counterweight block (1.8) slidably mounted inside, and a baffle (1.10) is mounted on the surface of the counterweight mechanism. The counterweight block (1.8) is suspended by the wire rope (1.7) and moves up and down by the motion traction of the main rocker arm assembly (2).

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