Strength type chest expanding trainer
The adjustable weight system in the chest expansion trainer addresses the issue of fixed weights in traditional outdoor equipment, allowing for customizable weight adjustment and improved stability and security.
Patent Information
- Application Number
- CN202421116148.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-05-21
AI Technical Summary
The counterweight of traditional outdoor chest expansion trainers cannot be adjusted and cannot adapt to the usage requirements of different groups.
A force-type chest expansion trainer including adjustable counterweight unit is designed. The counterweight plate is adjustable through the limiting assembly and the U-shaped counterweight rod to ensure that the counterweight plate does not break away from the high pull-up during use, and mechanically active connection is achieved through the connecting rod assembly to avoid jamming.
It realizes adjustable counterweight, suitable for different groups, improves the stability and safety of the device, and prevents the displacement of the counterweight plate, extends the service life and has anti-theft function.
Smart Images
Figure CN223096063U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of sports equipment, and specifically relates to a strength type chest expansion trainer. Background Art
[0002] The main functions of the chest expansion tensioner include: exercising muscles, strengthening the arms (biceps brachii, triceps brachii), and back; losing weight by burning calories to help burn body fat; promoting bone growth, improving bone metabolism, enhancing bone strength, preventing osteoporosis, and being beneficial to the bone development of teenagers. In traditional technologies, outdoor chest expansion trainers often use fixed weights as counterweights, and their counterweights cannot be adjusted, which cannot meet the application requirements of different groups. Content of the Utility Model
[0003] The utility model provides a strength type chest expansion trainer, which is used to solve the problem that in traditional technologies, outdoor chest expansion trainers often use fixed weights as counterweights, and their counterweights cannot be adjusted, which cannot meet the application requirements of different groups.
[0004] To achieve the above object, the technical solution adopted by the utility model is as follows:
[0005] A strength type chest expansion trainer includes a main frame, the bottom of the main frame is fixedly arranged on the ground, an L-shaped support rod is arranged at the front end of the main frame, a seat plate and a backrest plate are arranged at the top of the L-shaped support rod, high pull racks are arranged on both sides at the rear end of the main frame, the front ends of the high pull racks are connected with a chest expansion frame through a linkage rod assembly, the middle part of the high pull racks is hinged to the main frame through a hinge seat, and an adjustable counterweight unit is arranged on the side of the rear end of the high pull racks;
[0006] The high pull rack includes an upper arm and a rear arm, the upper arm is vertically arranged, its front end is connected with the chest expansion frame through a linkage rod assembly, the rear end of the upper arm and the front end of the rear arm are fixedly connected, and are rotationally connected to the main frame through a hinge seat and a limit main shaft, and the adjustable counterweight unit is vertically arranged outside the rear arm;
[0007] The adjustable counterweight unit includes a U-shaped counterweight rod fixedly arranged on the side of the high pull rack and perpendicular to it, sliding rods are fixedly arranged on the rod bodies at both ends of the U-shaped counterweight rod, and a plurality of counterweight plates are slidably arranged on the sliding rods and axially limited with the sliding rods through a limiting component.
[0008] Further, the limiting component includes limiting protrusions and annular rings, a plurality of limiting protrusions are arranged perpendicular to the axis of the sliding rod and are spaced along its axial direction, annular rings are fixedly arranged on both end faces of each counterweight plate, and a limiting groove with an annular structure adapted to the limiting protrusions is formed between the annular rings on both end faces of each counterweight plate.
[0009] Furthermore, the annular ring is provided with a groove matched with the limiting protrusion, and the grooves of the two annular rings on the same counterweight plate are symmetrically arranged relative to the counterweight plate.
[0010] Furthermore, the rod bodies at both ends of the U-shaped counterweight rod pass through the limit shaft and are vertically fixedly connected to the rear arm of the high pull frame through pins, and the limit shaft is vertically fixedly connected to the rear arm of the high pull frame.
[0011] Furthermore, the main frame includes two columns, the bottoms of the two columns and the L-shaped support rod are fixed on the ground, the two columns are fixedly connected by a cross beam, a reference rod is fixedly provided parallel to the bottom of the cross beam, both ends of the reference rod are fixedly connected to the two columns, a hinged seat is fixedly provided near the top of the column, and the tops of the two columns are fixedly connected by a cross bar.
[0012] Furthermore, the connecting rod assembly includes a first connecting rod and a second connecting rod, the chest expansion frame includes a vertically arranged "7"-shaped chest expansion rod, the head end of the upper arm is hinged to the tail end of the first connecting rod through a first rotating shaft, the head end of the first connecting rod is hinged to the tail end of the second connecting rod through a second rotating shaft, the head end of the second connecting rod is fixedly connected to the top end of the chest expansion rod and is rotatably connected to the third rotating shaft, the bottom end of the chest expansion rod is provided with a vertical handle, and a horizontal handle is provided above the vertical handle.
[0013] As the utility model adopts the above structure, compared with the prior art, the technical progress achieved is:
[0014] When in use, the trainee sits on the seat board with his back close to the backrest board, holds the handles at the bottom of the chest expander with both hands, and repeatedly expands and retracts the chest expander. The high pull-up frame swings up and down with the limiting main axis as the center, and the weight of the chest expander trainer can be adjusted by adjusting the position of the weight plate on the slide bar; the position of the weight plate relative to the slide bar is limited by the limiting component to prevent the weight plate from being displaced relative to the slide bar to change the weight during use; at the same time, a number of weight plates are limited to the high pull-up frame by the U-shaped weight plate and cannot be separated from the high pull-up frame. While achieving adjustable weight, it can also play an anti-theft role when used for outdoor sports equipment, and is suitable for the field of sports equipment technology. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.
[0016] In the attached picture:
[0017] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;
[0018] Figure 2 It is a structural schematic diagram of another angle of an embodiment of the utility model;
[0019] Figure 3 is a structural schematic diagram of the adjustable counterweight unit in the embodiment of the present utility model;
[0020] Figure 4 is a structural schematic diagram of the U-shaped counterweight rod in the embodiment of the present utility model;
[0021] Figure 5 is a cross-sectional view of the counterweight plate in the embodiment of the present utility model;
[0022] Figure 6 is an assembly drawing of the counterweight plate and the U-shaped counterweight rod in the embodiment of the present utility model.
[0023] Labeled components:
[0024] 01 - Adjustable counterweight unit, 11 - U-shaped counterweight rod, 12 - Slide rod, 121 - Slide rod body, 122 - Limit protrusion, 123 - Limit shaft, 13 - Counterweight plate, 131 - Counterweight plate body, 132 - Ring, 133 - Groove, 134 - Limit groove;
[0025] 02 - Main frame, 21 - Reference rod, 22 - Limit main shaft, 23 - Handrail, 03 - Cross beam, 04 - L-shaped support rod, 05 - Seat plate, 06 - Backrest plate, 07 - Chest expansion rod, 71 - Vertical handle, 2 - Horizontal handle, 08 - Upper arm, 81 - Hinge seat, 82 - First rotating shaft, 83 - First linkage rod, 84 - Second rotating shaft, 85 - Second linkage rod, 86 - Third rotating shaft, 09 - Rear arm, 00 - Pin. Specific embodiments
[0026] The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present utility model, and are not used to limit the present utility model.
[0027] The present utility model discloses a strength type chest expansion trainer, as Figure 1As shown in the figure, it includes a main frame 02, the bottom of the main frame 02 is fixedly installed on the ground, an L-shaped support rod 04 is provided at the front end of the main frame 02, a seat plate 05 and a backrest plate 06 are provided at the top of the L-shaped support rod 04, high pull racks are provided on both sides at the rear end of the main frame 02, the front end of the high pull rack is connected with an expansion chest rack through a linkage assembly, the middle part of the high pull rack is hinged to the main frame 02 through a hinge seat 81, and an adjustable counterweight unit is provided on the side of the rear end of the high pull rack; the rod bodies at both ends of the U-shaped counterweight rod 11 pass through the limit shaft 123 and are perpendicularly and fixedly connected to the rear arm 09 of the high pull rack through a pin 00, and the limit shaft 123 is perpendicularly and fixedly connected to the rear arm 09 of the high pull rack. The expansion chest rack is located above the front of the seat plate 05, and the L-shaped support rod 04 is arranged upside down, and its bottom is buried below the ground, which can support the main frame 02 and improve the overall stability of the equipment, and the top is fixedly connected to the cross beam 03.
[0028] As a specific implementation, as Figure 2 shown in the figure, the main frame includes two vertical columns, the bottoms of the two vertical columns and the L-shaped support rod 04 are fixedly installed on the ground, the two vertical columns are fixedly connected by a cross beam 03, a reference rod 21 is fixedly installed in parallel below the cross beam 03, both ends of the reference rod 21 are fixedly connected to the two vertical columns, the hinge seat 81 is fixedly installed near the top of the vertical column, and the tops of the two vertical columns are fixedly connected by a cross bar. The high pull rack includes an upper arm 08 and a rear arm 09, the upper arm 08 is arranged vertically, its front end is connected to the expansion chest rack through a linkage assembly, the rear end of the upper arm 08 and the front end of the rear arm 09 are fixedly connected, and are rotationally connected to the main frame 02 through a hinge seat 81 and a limit main shaft 22, and the adjustable counterweight unit is vertically arranged outside the rear arm 09. The bottoms of the vertical columns and the bottom of the L-shaped support rod 04 are buried below the ground, and the reference rod 21 is the horizon.
[0029] Further, the linkage assembly includes a first linkage rod 83 and a second linkage rod 85, the expansion chest rack includes an expansion chest rod 07 with a "7"-shaped structure arranged vertically, the front end of the upper arm 08 is hinged to the rear end of the first linkage rod 83 through a first rotating shaft 82, the front end of the first linkage rod 83 is hinged to the rear end of the second linkage rod 85 through a second rotating shaft 84, the front end of the second linkage rod 85 is fixedly connected to the top end of the expansion chest rod 07 and is rotationally connected to a third rotating shaft 86, a vertical handle 71 is provided at the bottom end of the expansion chest rod 07, and a horizontal handle 72 is provided above the vertical handle 71.
[0030] Specifically, the connection relationship between the various parts of the linkage assembly is as follows: the first rotating shaft 82 is horizontally and fixedly installed at the front end of the upper arm 08 and is hinged to the front end of the first linkage rod 83 through a hinge member, the second rotating shaft 84 is vertically and fixedly installed at the rear end of the second linkage rod 85 and is hinged to the front end of the first linkage rod 83 through a hinge member, the first linkage rod 83 is arranged longitudinally, the second linkage rod 85 is arranged horizontally, and the third rotating shaft 86 is vertically and fixedly installed on the cross bar.
[0031] The working principle of the chest expansion exercise of the training equipment is as follows: when using it, the trainee sits on the seat board 05, with the back close to the backrest board 06, and holds the handles at the bottom of the chest expansion rod 07 with both hands. According to personal needs, the vertical handle 71 or the horizontal handle 72 is held, and the chest expansion rod 07 is repeatedly expanded and retracted. The high pull frame swings up and down with the limit main axis as the center;
[0032] The action relationship between the various parts is as follows: when the chest expansion rod 07 expands outward, the chest expansion rod 07 and the second linkage rod 85 swing around the third rotating shaft 86, the tail end of the second linkage rod 85 pushes the first linkage rod 83 to move backward, and the tail end of the first linkage rod 83 pushes the head end of the upper arm 08 to move backward. Since the upper arm 08 is fixedly connected to the rear arm 09 and is hinged to the column through the hinge seat 81, the rear arm 09 together with the adjustable counterweight unit swings downward around the limit main shaft 22 as the center due to the action of gravity.
[0033] When the chest expansion rod 07 is retracted, the trainer applies a retracting force to the chest expansion rod 07 through the handle, so that the tail end of the second linkage rod 85 pulls the first linkage rod 83 to move forward, and the tail end of the first linkage rod 83 pulls the head end of the upper arm 08 to move upward. Because the upper arm 08 is fixedly connected to the rear arm 09 and is hinged to the column through the hinge seat 81, it is necessary to overcome the gravity of the counterweight unit, pull the rear arm 09 together with the adjustable counterweight unit to swing upward with the limit spindle 22 until it is reset. The process of overcoming the gravity reset of the adjustable counterweight unit is the chest expansion training process. By adjusting the position of different numbers of counterweight plates 13 from the limit spindle 22, the counterweight can be adjusted to change the adjustment of the chest expansion force.
[0034] The mechanical active connection between the chest expansion frame and the high pull frame is achieved through the connecting rod assembly to avoid jamming. Compared with the pull rope traction counterweight structure commonly used in traditional technology, this mechanical structure is stable and reliable, with good safety. It can avoid muscle damage to trainees caused by sudden breakage of the pull rope, and at the same time increase the service life of the equipment.
[0035] As a specific implementation method, Figure 3 As shown, the adjustable counterweight unit 01 includes a U-shaped counterweight rod 11 fixedly arranged on the side of the sit push frame and perpendicular to it, a sliding rod 12 is fixedly arranged on the rod body at both ends of the U-shaped counterweight rod 11, and a plurality of counterweight plates 13 are slidably arranged on the sliding rod 12 and axially limited by a limit assembly and the sliding rod 12.
[0036] The U-shaped counterweight rod 11 limits the moving range of the counterweight plate 13, so that it cannot leave the main frame 02 and can only move on the U-shaped counterweight rod 11. Several counterweight plates 13 can be reasonably distributed according to the strength of different groups. When the required counterweight is larger, the rear counterweight plate 13 can be appropriately moved to the front. When the required counterweight is smaller, the front counterweight plate 13 can be appropriately moved to the back.
[0037] As a specific embodiment, as Figures 4-6 shown, the limiting component includes limiting protrusions 122 and annular rings 132. A plurality of limiting protrusions 122 are arranged perpendicular to the axis of the sliding rod 12 and are spaced along its axial direction. Annular rings 132 are fixedly provided on the two end faces of each counterweight piece 13. A limiting groove 134 with an annular structure adapted to the limiting protrusions 122 is formed between the annular rings 132 on the two end faces of each counterweight piece 13. A groove 133 adapted to the limiting protrusions 122 is provided on the annular ring 132. The grooves 133 of the two annular rings 132 on the same counterweight piece 13 are symmetrically arranged with respect to the counterweight piece 13. The distance between adjacent two protrusions is the same as the distance between the limiting grooves 134 on adjacent two counterweight pieces 13. The sliding rod 12 includes a sliding rod body 121 with a tubular structure, and a plurality of limiting protrusions 122 are fixedly provided on the sliding rod body 121. The counterweight piece 13 includes a counterweight piece body 131, and the annular ring 132 is fixedly installed on the two end faces of the counterweight piece body 131 through pins 00.
[0038] During the training process, the limiting protrusions 122 are located in the limiting grooves 134 between the two annular rings 132 on the counterweight piece 13. The counterweight piece 13 is stuck by the limiting protrusions 122, and the limiting protrusions 122 limit the counterweight piece 13. When it is necessary to adjust the position of the counterweight piece 13 at both ends of the U-shaped counterweight rod 11, rotate the counterweight piece 13 to make the groove 133 on the annular ring 132 rotate to the position of the limiting protrusion 122, release the restriction of the limiting protrusion 122, and then the counterweight piece 13 can be moved along the sliding rod 12. Until after passing through the middle position of the U-shaped counterweight rod 11 and reaching the other end, then limit the counterweight piece 13 according to the above opposite steps to achieve counterweight adjustment. This structure can realize the adjustable position of the counterweight piece 13, and further realize the adjustable counterweight of the apparatus training. Through the limiting structure of the limiting protrusions 122 and the limiting grooves 134, the relative position of the counterweight piece 13 with respect to the U-shaped counterweight rod 11 can be relatively fixed, preventing the counterweight piece 13 from shifting during the training process and causing the counterweight to change.
[0039] The counterweight piece 13 in the traditional technology is often placed on a storage rack or on the ground. When adjusting the counterweight, it needs to be moved around. When not in use, the scattered counterweight pieces 13 also need to be sorted onto the storage rack. The counterweight piece 13 in the present utility model is limited on the U-shaped counterweight rod and does not need to be carried back and forth and sorted like the counterweight piece 13 in the traditional technology. At the same time, when used outdoors, the U-shaped counterweight rod 11 can also play an anti-theft role.
[0040] In summary, the present utility model solves the problem that the outdoor chest expander in the traditional technology often uses a fixed load as the counterweight, and its counterweight cannot be adjusted, which cannot meet the application requirements of different groups, and is applicable to the technical field of sports equipment.
[0041] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the scope of protection of the claims of the present invention.
Claims
1. A power chest expander, comprising a main frame, characterized in that: The bottom of the main frame is fixedly installed on the ground. An L-shaped support rod is provided at the front end of the main frame. A seat plate and a backrest plate are provided at the top of the L-shaped support rod. High-tension frames are provided on both sides at the rear end of the main frame. The head end of the high-tension frame is connected to an expansion chest frame through a linkage rod assembly. The middle part of the high-tension frame is hinged to the main frame through a hinge seat. An adjustable counterweight unit is provided on the side of the tail end of the high-tension frame. The high-tension frame includes an upper arm and a rear arm. The upper arm is vertically arranged. Its head end is connected to the expansion chest frame through a linkage rod assembly. The tail end of the upper arm and the head end of the rear arm are fixedly connected and are rotatably connected to the main frame through a hinge seat and a limit main shaft. The adjustable counterweight unit is vertically arranged outside the rear arm. The adjustable counterweight unit includes a U-shaped counterweight rod fixedly installed on the side of the high-tension frame and perpendicular to it. Slide rods are fixedly installed on the rod bodies at both ends of the U-shaped counterweight rod. A plurality of counterweight plates are slidably arranged on the slide rods and are axially limited to the slide rods through a limit assembly.
2. The power chest expander according to claim 1, wherein: The limit assembly includes limit protrusions and annular rings. A plurality of limit protrusions are perpendicular to the axis of the slide rod and are arranged at intervals along its axial direction. Annular rings are fixedly installed on the two end faces of each counterweight plate. A limit groove with an annular structure adapted to the limit protrusions is formed between the annular rings on the two end faces of each counterweight plate.
3. The power chest expander according to claim 2, wherein: Grooves adapted to the limit protrusions are provided on the annular rings. The grooves on the two annular rings of the same counterweight plate are symmetrically arranged with respect to the counterweight plate.
4. A power chest expander according to claim 1, characterized in that: The rod bodies at both ends of the U-shaped counterweight rod pass through the limit shafts and are perpendicularly and fixedly connected to the rear arm of the high-tension frame through pins. The limit shafts are perpendicularly and fixedly connected to the rear arm of the high-tension frame.
5. A power chest expander according to claim 1, characterized in that: The main frame includes two columns. The bottoms of the two columns and the L-shaped support rod are fixedly installed on the ground. The two columns are fixedly connected to each other through a cross beam. A reference rod is fixedly installed in parallel below the cross beam. The two ends of the reference rod are fixedly connected to the two columns. The hinge seat is fixedly installed near the top of the column. The tops of the two columns are fixedly connected through a cross bar.
6. The power chest expander according to claim 5, wherein: The linkage rod assembly includes a first linkage rod and a second linkage rod. The expansion chest frame includes an expansion chest rod in a "7"-shaped structure arranged vertically. The head end of the upper arm is hinged to the tail end of the first linkage rod through a first rotating shaft. The head end of the first linkage rod is hinged to the tail end of the second linkage rod through a second rotating shaft. The head end of the second linkage rod is fixedly connected to the top end of the expansion chest rod and is rotatably connected to a third rotating shaft. A vertical handle is provided at the bottom end of the expansion chest rod. A horizontal handle is provided above the vertical handle.