Linear sliding table for muscle strength test training device
The linear slide table driven by the servo motor is connected to the barbell rod, combined with real-time monitoring of the laser rangefinder, solves the problem that existing muscle strength testing equipment cannot accurately measure the maximum force at different joint angles, and realizes linear isometric muscle training, improves the training effect and reduces the risk of injury.
Patent Information
- Application Number
- CN202421649329.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-07-12
AI Technical Summary
Existing strength testing equipment is difficult to accurately measure maximum strength at different joint angles, and traditional resistance training and centrifugal training cannot achieve linear isospeed movement, resulting in poor muscle building effect and risk of injury.
The linear slide table driven by a servo motor is connected to the barbell lever. The linear constant speed movement of the barbell lever is controlled through the servo motor, and the position is monitored in real time by laser rangefinder to achieve accurate control of the barbell lever in the set speed and direction.
Linear isospeed muscle testing at different joint angles is realized, which improves muscle building targeting, reduces the risk of injury, and can accurately adjust the load size under safe conditions.
Smart Images
Figure CN223054989U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of muscle strength testing, and particularly relates to a linear slide table for a muscle strength testing and training device. Background Technique
[0002] Skeletal muscle is the muscle attached to the bones. Skeletal muscle not only plays a role in maintaining the human body posture and assisting movement, but also has functions such as sugar storage and endocrine. When skeletal muscle atrophies, not only will the motor function decline, but also metabolic diseases such as diabetes are likely to occur. For people who do not often participate in sports, the muscle mass peaks at about 20-25 years old, and then gradually decreases with the increase of age, and the motor ability will also gradually decline accordingly. Therefore, many people are carrying out exercise training aimed at increasing muscle mass in order to maintain or improve their motor ability.
[0003] Resistance strength training is an important method for exercising and increasing the skeletal muscle mass of the human body. However, it is not the case that as long as resistance strength training is carried out, the skeletal muscle mass can be increased. Among the training elements that stimulate skeletal muscle growth, mobilizing fast-twitch muscles that are easy to thicken is a necessary condition. Therefore, the American College of Sports Medicine (ACSM) once pointed out that when performing traditional resistance training, only an intensity of ≥70% 1RM can promote muscle hypertrophy. In addition, the human body realizes movement through the contraction of skeletal muscle across the bones on both sides of the joint. Since skeletal muscle can only exert force in one direction, which is linear force, while the movement of the joint is rotational movement, from a biomechanical perspective, when the human joint is at different angles, the force exerted will be very different. For example, in the squatting and standing up movement, with the change of the lower limb joint angle, the maximum force varies greatly. That is to say, in the weight-bearing squatting exercise aimed at increasing muscle mass, a certain weight-bearing may be the best muscle-building load weight when squatting deeply at the knee joint, but the load will be too small when squatting shallowly. If we want to exercise all the muscles of the quadriceps femoris through the squatting and standing up method, we need to measure the maximum force at different knee joint angles and train separately at different knee joint angles. This will not only consume a lot of physical strength, but also bear a great risk of injury during the process of measuring the maximum force.
[0004] In addition, eccentric training is also an important training method for quickly increasing muscle mass and strength. Eccentric training refers to the method of lengthening the muscle while it is exerting force. Research has confirmed that in eccentric training, fast-twitch muscle fibers that are prone to thickening are preferentially mobilized, and each muscle fiber can generate a force that is 1.5 - 1.8 times the maximum isometric contraction. Therefore, eccentric training can achieve the goal of quickly increasing muscle mass. When performing eccentric training, it is not necessary to use a large amount of force or explosive force to obtain results. On the contrary, slowly lengthening the muscle while exerting force is more effective. In traditional resistance eccentric training, the speed often needs to be controlled by oneself, and the load weight is constant. As mentioned above, at different joint angles, the mobilized muscles and the exerted force are not the same. If a barbell with a constant weight is used, the desired training effect cannot be obtained.
[0005] Therefore, if there is a device that can quickly measure the maximum force at different joint angles under the condition of ensuring safety, and can change the magnitude of the load throughout the process during the change of joint angles to achieve linear isokinetic testing, it can not only greatly improve the targeted effect of muscle growth, but also reduce the risk of injury. Summary of the Invention
[0006] The purpose of the present utility model is to provide a linear slide for a muscle strength testing and training device to achieve the linear isokinetic movement of the barbell rod used for force measurement.
[0007] To achieve the above purpose, the technical solution adopted by the present utility model is as follows:
[0008] A linear slide for a muscle strength testing and training device is provided on a gantry for carrying the barbell rod used for force measurement and is connected to the barbell rod. It includes a chute provided on the gantry, a lead screw provided in the chute, a servo motor connected to the lead screw to drive the lead screw to rotate, and a slider sleeved on the lead screw and slidably connected to the chute. The slider is connected to the barbell rod.
[0009] Further, the slider includes a slide bar slidably provided on the chute plate and a slider provided on the slide bar; there are at least two slide bars, and a clamping bar is respectively provided on two chute plates of the chute, and at least one slide bar is slidably inserted on each clamping bar.
[0010] Further, a coupling is sleeved on the lead screw, and a sleeve hole adapted to the coupling is provided on the slider. The slider is sleeved on the coupling through the sleeve hole.
[0011] Further, a motor seat is provided at one end of the chute, and the servo motor is installed in the motor seat.
[0012] Further, a base is provided at one end of the chute, and the lead screw is rotatably installed in the base.
[0013] Further, a laser rangefinder is installed on the bottom surface of the slider, and a laser reflection surface facing the laser rangefinder is provided on the top surface of the base.
[0014] Further, a speed reducer is provided between the servo motor and the lead screw.
[0015] Further, it also includes a cover plate, a first bottom plate and a second bottom plate. The cover plate is covered on the sliding groove, and the back of the sliding groove is sequentially connected to the first bottom plate and the second bottom plate, and the second bottom plate is fixed on the gantry.
[0016] Further, there are two linear slides, which are symmetrically arranged on the gantry respectively and are connected to the two ends of the barbell rod through the sliding members.
[0017] The utility model has a high-precision speed, position and torque control method through the servo motor. Therefore, using the servo motor to form a linear slide to improve the gantry structure can accurately control the movement speed and movement direction. At the same time, a laser rangefinder is provided inside the slide to monitor and measure the actual position of the slide in real time, so as to realize the precise control of the movement range of the linear slide and the timing of generating the reverse speed when the barbell rod reaches the limit position.
[0018] Compared with the prior art, the utility model has the following beneficial effects:
[0019] The linear slide of the utility model is arranged on the gantry and is connected to the barbell rod on the gantry to adjust the speed and direction of the barbell rod moving on the gantry. In conventional muscle strength test training, since the strength at different joint angles is different, some joint angles have small strength and some joint angles have large strength, and the force applied to the barbell rod is uneven, making it difficult to achieve linear isokinetic force measurement. The utility model adopts a linear slide, enabling the trainer to exert force following or against the movement of the barbell rod, and making the entire joint movement move at a preset speed, thus realizing linear isokinetic force measurement.
[0020] When the barbell rod is connected to the linear slide, the barbell rod does not need to be connected with barbell plates. Only by synchronously controlling the two slides to generate the same speed in the same movement direction, the barbell rod can move up and down within the set movement range. When the trainer carries the barbell rod and exerts force on the barbell rod and moves up and down within this movement range, in order to maintain the set speed of the barbell rod, according to the principle of action and reaction of Newton's third law, the barbell rod control mechanism will generate an equal resistance against the trainer according to the magnitude of the force exerted by the trainer, and at the same time, the magnitude of the force exerted by the trainer is displayed in real time through a pressure sensor, thereby realizing linear concentric, eccentric, isometric, isotonic and isokinetic muscle test training. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a structural diagram of the utility model (without the cover plate covered).
[0022] Figure 2This is the exploded view of the present utility model.
[0023] Figure 3 This is the structure diagram of the slider of the present utility model.
[0024] Among them, the names corresponding to the reference numerals are:
[0025] 3 - chute, 4 - lead screw, 5 - servo motor, 6 - sliding member, 7 - reducer, 8 - cover plate, 9 - first base plate, 10 - second base plate, 31 - clamping strip, 32 - motor base, 33 - base, 34 - laser reflection surface, 41 - coupling, 61 - sliding bar, 62 - slider, 63 - sleeve hole, 64 - laser rangefinder. Detailed implementation manners
[0026] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.
[0027] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0028] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; of course, it can also be a mechanical connection or an electrical connection; in addition, it can also be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0029] Such as Figures 1-3As shown in the figure, a linear slide for a muscle strength testing and training device provided by the present utility model is arranged on a gantry for carrying a barbell rod used for force measurement and is connected to the barbell rod. It includes a chute 3 arranged on the gantry, a lead screw 4 arranged in the chute 3, a servo motor 5 connected to the lead screw 4 to drive the lead screw 4 to rotate, and a slider 6 sleeved on the lead screw 4 and slidably connected to the chute 3. The slider 6 is connected to the barbell rod. When the servo motor 5 operates, the barbell rod moves synchronously with the slider 6 through the lead screw 4, and the direction and speed of the barbell rod are adjusted by the forward and reverse rotation directions and speed of the servo motor 5. The rotation speed of the servo motor 5 is controlled based on the pulse frequency, and the pulse direction (direction level, high level for clockwise rotation, low level for counterclockwise rotation) controls the rotation direction of the servo motor 5 to achieve the adjustment of the moving direction and speed of the barbell rod. During isokinetic concentric training, the active force is provided by muscle contraction, and the servo motor 5 provides a direction consistent with the movement direction and the movement direction of the exerciser; during isokinetic eccentric training, the servo motor 5 provides a direction opposite to the movement direction and the movement direction of the exerciser. For example, when the exerciser exerts force upward, during isokinetic concentric training, the movement direction of the servo motor 5 provides upward movement to limit the maximum movement speed of the trainer; during isokinetic eccentric training, the servo motor 5 provides downward movement, which is opposite to the direction the trainer hopes to move. In particular,
[0030] Preferably, there are two linear slides, which are symmetrically arranged on the gantry respectively and are connected to both ends of the barbell rod through the slider 6. The two linear slides can operate to achieve synchronous operation of both ends of the barbell rod, ensuring the stability of training. In particular, the two servo motors 5 of the two linear slides are connected to a servo controller, and the two servo motors 5 are driven by one servo controller. Therefore, the two linear slides can operate to achieve synchronous operation of both ends of the barbell rod, ensuring the levelness of the barbell rod.
[0031] In one of the embodiments, a more detailed structure of the slider 6 is provided: the slider 6 includes a slide bar 61 slidably arranged on the groove plate of the chute 3 and a slider 62 arranged on the slide bar 61. The barbell rod is connected to the slider 62, and the slider 62 slides synchronously with the slide bar 61 on the chute 3, thereby realizing the up and down sliding of the barbell rod; there are at least two slide bars 61, and a clamping bar 31 is respectively arranged on the two groove plates of the chute 3, and at least one slide bar 61 is slidably inserted on each clamping bar 31, improving the sliding efficiency through the clamping bars 31 on the groove plates of the chute 3.
[0032] In one of the embodiments, a more detailed connection method between the lead screw 4 and the slider 62 is provided: a coupling 41 is sleeved on the lead screw 4, and a sleeve hole 63 adapted to the coupling 41 is formed on the slider 62. The slider 62 is sleeved on the coupling 41 through the sleeve hole 63. The slider 62 is connected to the lead screw 4 through the coupling 41. On the one hand, the stability of the connection of the slider 62 is enhanced, and on the other hand, it is convenient for the disassembly of the lead screw 4 and the slider 62, facilitating the maintenance or replacement of the lead screw 4 or the slider 62.
[0033] In one of the embodiments, a more detailed structure of the sliding groove 3 is provided: a motor base 32 is provided at one end of the sliding groove 3, and the servo motor 5 is installed in the motor base 32, and the motor base 32 ensures the installation stability of the servo motor 5.
[0034] In one of the embodiments, a more detailed structure of the sliding groove 3 is provided: a base 33 is provided at one end of the sliding groove 3, and the lead screw 4 is rotatably installed in the base 33, and the base 33 facilitates the connection of the lead screw 4.
[0035] In one of the embodiments, a more detailed structure of the sliding groove 3 is provided: a laser rangefinder 64 is installed on the bottom surface of the slider 62, and a laser reflection surface 34 facing the laser rangefinder 64 is provided on the top surface of the base 33. The laser rangefinder 64 is fixed on the slider 62 and can move synchronously with the barbell rod, while the laser reflection surface 34 is fixed on the top surface of the base 33 and does not change its position. During the movement of the barbell rod, the laser rangefinder 64 continuously emits laser light and reflects it through the laser reflection surface 34, and the reflected laser light is then received by the laser rangefinder 64. Thus, the position change of the barbell rod can be measured. On the one hand, the speed of the barbell rod can be inferred from the changes in position and time. On the other hand, it can be detected whether the heights at both ends of the barbell rod are consistent. When they are inconsistent and the error exceeds the preset value, the servo motor is controlled to stop to avoid accidents.
[0036] In one of the embodiments, a more detailed connection method between the servo motor 5 and the lead screw 4 is provided: a speed reducer 7 is provided between the servo motor 5 and the lead screw 4. The speed reducer can convert the high-speed and low-torque output of the motor into a low-speed and high-torque output, and by reducing the output speed and increasing the output torque, it ensures the power demand during the test process.
[0037] In one of the embodiments, a more detailed structure of the linear slide is provided: it further includes a cover plate 8, a first bottom plate 9 and a second bottom plate 10. The cover plate 8 is covered on the sliding groove 3, and the back surface of the sliding groove 3 is sequentially connected to the first bottom plate 9 and the second bottom plate 10, and the second bottom plate 10 is fixed to the gantry. The cover plate 8 encapsulates the lead screw 4 and the slider 6, not only isolating them from the outside world to ensure the stability of operation, but also avoiding safety accidents. The sliding groove 3 is fixed to the gantry through the first bottom plate 9 and the second bottom plate 10, and the first bottom plate 9 and the second bottom plate 10 are also fixed to the motor base 32 to ensure the stability of the motor base 32 during motor operation.
[0038] The servo motor 5 and the speed reducer 7 used in the present utility model are both existing known electrical devices and can be directly purchased and used in the market. Their structures, circuits, and control principles are all existing known technologies. Therefore, the structures, circuits, and control principles of the servo motor 5 and the speed reducer 7 are not described in detail herein.
[0039] Finally, it should be noted that the above embodiments are only the preferred embodiments of the present invention to illustrate the technical solutions of the present invention, rather than to limit it, and certainly not to limit the patent scope of the present invention; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present invention; that is to say, any meaningless changes or polishing made in the main design concept and spirit of the present invention, as long as the technical problems solved are still the same as those of the present invention, should be included in the protection scope of the present invention; in addition, directly or indirectly applying the technical solutions of the present invention to other related technical fields shall also be included in the patent protection scope of the present invention by the same token.
Claims
1. A linear slide for a muscle strength testing and training device, which is provided on a gantry for carrying a barbell rod used for force measurement and is connected to the barbell rod, and is characterized in that, It includes a chute (3) provided on the gantry, a lead screw (4) provided in the chute (3), a servo motor (5) connected to the lead screw (4) to drive the lead screw (4) to rotate, and a slider (6) sleeved on the lead screw (4) and slidably connected to the chute (3), and the slider (6) is connected to the barbell rod.
2. The linear slide for a muscle strength testing and training device according to claim 1, wherein The slider (6) includes a slide bar (61) slidably provided on the chute plate of the chute (3) and a slider (62) provided on the slide bar (61); there are at least two slide bars (61), and a clamping bar (31) is provided on each of the two chute plates of the chute (3), and at least one slide bar (61) is slidably inserted on each clamping bar (31).
3. The linear slide table for a muscle strength testing and training device according to claim 1, characterized in that, A coupling (41) is sleeved on the lead screw (4), a sleeve hole (63) adapted to the coupling (41) is formed on the slider (62), and the slider (62) is sleeved on the coupling (41) through the sleeve hole (63).
4. The linear slide for a muscle strength testing and training device according to claim 1, wherein, A motor base (32) is provided at one end of the chute (3), and the servo motor (5) is installed in the motor base (32).
5. The linear slide table for a muscle strength testing and training device according to claim 1, wherein, A base (33) is provided at one end of the chute (3), and the lead screw (4) is rotatably installed in the base (33).
6. A linear slide for a muscle strength testing and training device according to claim 4, characterized in that, A laser rangefinder (64) is installed on the bottom surface of the slider (62), and a laser reflection surface (34) facing the laser rangefinder (64) is provided on the top surface of the base (33).
7. A linear slide for a muscle strength testing and training device according to claim 1, characterized in that, A reducer (7) is provided between the servo motor (5) and the lead screw (4).
8. A linear slide for a muscle strength testing and training device according to claim 1, characterized in that, It further includes a cover plate (8), a first bottom plate (9) and a second bottom plate (10). The cover plate (8) covers the chute (3), the back surface of the chute (3) is sequentially connected to the first bottom plate (9) and the second bottom plate (10), and the second bottom plate (10) is fixed to the gantry.
9. The linear slide table for a muscle strength testing and training device according to claim 1, wherein, There are two linear slides, which are symmetrically provided on the gantry and connected to both ends of the slider (6) and the barbell rod.