阅读说明：本技术 一种可调负载的恒力俘能发电背包 (Load-adjustable constant-force energy-harvesting power generation backpack ) 是由 朱延河 巨浩天 赵杰 于 2021-01-25 设计创作，主要内容包括：一种可调负载的恒力俘能发电背包,它包括背包连接板、带有背带的背板和镜像设置的两套平衡机构；还包括设置于背板的另一侧面的且分别镜像布置的两个可调恒力机构和两个发电机构,每个所述可调恒力机构包括第二柔性绳和第三导轮组；第三导轮组设置在背板的底部,第二柔性绳绕过第三导轮组,第二柔性绳的另一端与弹簧组的下端连接；每个所述发电机构包含电机、带轮一、带轮二和传动带,电机安装在背板的顶部,电机的输出轴上安装有带轮一,背板上安装有带轮二,带轮一和带轮二通过传动带传动。该背包整体为被动式结构,且满足人体各种频率下的运动,将背包与人体的相对运动带动电机进行发电,保证了背包与人体相对运动过程中不会产生冲击作用。(A load-adjustable constant-force energy-harvesting power generation backpack comprises a backpack connecting plate, a back plate with straps and two sets of balance mechanisms arranged in a mirror image manner; the adjustable constant force mechanism comprises a first flexible rope and a first guide wheel group, and is characterized by further comprising two adjustable constant force mechanisms and two power generation mechanisms which are arranged on the other side surface of the back plate and are respectively arranged in a mirror image mode, wherein each adjustable constant force mechanism comprises a second flexible rope and a third guide wheel group; the third guide wheel group is arranged at the bottom of the back plate, the second flexible rope winds around the third guide wheel group, and the other end of the second flexible rope is connected with the lower end of the spring group; each power generation mechanism comprises a motor, a first belt wheel, a second belt wheel and a transmission belt, the motor is installed at the top of the back plate, the first belt wheel is installed on an output shaft of the motor, the second belt wheel is installed on the back plate, and the first belt wheel and the second belt wheel are in transmission through the transmission belt. The backpack is integrally of a passive structure, meets the requirements of movement of a human body under various frequencies, drives the motor to generate power by relative movement of the backpack and the human body, and ensures that no impact effect is generated in the relative movement process of the backpack and the human body.)

1. A load-adjustable constant-force energy-harvesting power generation backpack comprises a backpack connecting plate (2), a back plate (1) with straps (1-1) and two sets of balance mechanisms arranged in a mirror image mode, wherein the straps (1-1) are arranged on one side face of the back plate (1), the two sets of balance mechanisms are arranged on the other side face of the back plate (1), and each set of balance mechanism comprises a screw pair (3), a sliding block (4), a first guide wheel set (5), a spring set (6), a second guide wheel set (7), a swing rod (8) and a first flexible rope (9); the sliding block (4) is connected with a screw nut of the screw pair (3) and can slide up and down, a first guide wheel set (5) is respectively installed at two ends of the sliding block (4), the spring set (6) is arranged in a spring protection sleeve (10) installed at the bottom of the back plate (1) in a sliding mode, a second guide wheel set (7) is installed at the upper portion of the back plate (1), one end of each swing rod (8) is rotatably installed on the back plate (1), the other end of each swing rod is arranged in a sliding groove of a transverse frame on the back plate (1) and can slide transversely, the transverse frame is connected with the backpack connecting plate (2), one end of each first flexible rope (9) is fixed at the upper end of each spring set (6), each first flexible rope (9) is wound on guide wheels of the second guide wheel set (7) and the first guide wheel set (5), the other end of each first flexible rope (9) is fixed at the other end of each swing rod (8), the two swing rods (8) are, the backpack connecting plate (2) is arranged on the back plate (1) in a vertically slidable manner;

the method is characterized in that: the adjustable constant force mechanism comprises a back plate (1), two adjustable constant force mechanisms and two power generation mechanisms, wherein the two adjustable constant force mechanisms and the two power generation mechanisms are arranged on the other side surface of the back plate (1) and are respectively arranged in a mirror image mode, and each adjustable constant force mechanism comprises a second flexible rope (13) and a third guide wheel group (14); one ends of the two swing rods (8) are arranged adjacent to each other and are arranged below the cross frame; the third guide wheel set (14) is arranged at the bottom of the back plate (1), one end of the second flexible rope (13) is fixedly connected with the sliding block (4), the second flexible rope (13) bypasses the third guide wheel set (14), and the other end of the second flexible rope (13) is connected with the lower end of the spring set (6);

each power generation mechanism comprises a motor (16), a first belt wheel (17-1), a second belt wheel (17-2) and a transmission belt, the motor (16) is installed at the top of the back plate (1), the first belt wheel (17-1) is installed on an output shaft of the motor (16), the second belt wheel (17-2) is installed on the back plate (1), the first belt wheel (17-1) and the second belt wheel (17-2) are transmitted through the transmission belt, and one point of the straight transmission belt is fixed on the backpack connecting plate (2).

2. The load-adjustable constant-force energy-harvesting and power-generating backpack of claim 1, wherein: the cross frame comprises two horizontal sliding rails (11); guide wheel (15) with grooves are installed at the other end of the rocker (8), the guide wheel (15) is arranged in a gap between the two horizontal sliding rails (11) which are arranged at intervals, the wheel grooves of the guide wheel (15) are attached to the horizontal sliding rails (11), and the backpack connecting plate (2) is installed on the horizontal sliding rails (11).

3. The load-adjustable constant-force energy-harvesting and power-generating backpack of claim 2, wherein: the backpack connecting plate (2) is arranged on the back plate (1) in a sliding manner through a sliding rail assembly arranged on the other side surface of the back plate (1), and the sliding rail assembly comprises a pulley seat (18), a vertical sliding rail (19) and three pulleys (20); pulley blocks (18) are fixed on a back plate (1), a backpack connecting plate (2) is installed on a vertical sliding rail (19), the vertical sliding rail (19) is clamped and slides by three pulleys (20) installed on the pulley blocks (18), the peripheral side face of one pulley (20) is in contact with the end face of the vertical sliding rail (19), and the peripheral side faces of the other two pulleys (20) are in contact with the front side face and the rear side face of the vertical sliding rail (19).

4. The load-adjustable constant-force energy-harvesting and power-generating backpack of claim 3, wherein: the backboard (1) and the backpack connecting plate (2) are both made of carbon fibers.

5. The load-adjustable constant-force-harvesting power-generating backpack of claim 2 or 4, wherein: the horizontal slide rail (11) and the vertical slide rail (19) are both made of aluminum alloy, and the spring protection sleeve (10) is made of nylon material.

6. The load-adjustable constant-force energy-harvesting and power-generating backpack of claim 5, wherein: a protection pad for supporting the back is also tiled on one side surface of the back plate (1).

Technical Field

The invention relates to a suspension power generation backpack, in particular to a load-adjustable constant-force energy-harvesting power generation backpack.

Background

With the increasing level of technology, portable electronic devices are becoming an indispensable part of people's lives. How to recycle extra consumed energy to charge the portable electronic device while not interfering with human body movement is a popular direction of research at present. The backpack serves all aspects of human as a common wearing device, but the backpack generates inertial impact due to the fact that the gravity center of the human body moves up and down when the human body walks or runs, the inertial impact can cause tissue deformation of brachial plexus and subclavian artery through shoulder straps when the human body per se, especially load pressure during long-time carrying of students, hikers and individual marchs, and the like, the risk of nerve and muscle activity and potential skeleton damage of the human body is enhanced, and great extra energy consumption is generated. Meanwhile, the movement gait of the human body can be changed along with the increase of the load, the flexion and extension of the knee joint and the rotation range of the pelvis are reduced, the stride is reduced, the time of the double-leg supporting stage is increased, and the time of the swinging stage is reduced.

Disclosure of Invention

The invention provides a load-adjustable constant-force energy-harvesting power generation backpack, which overcomes the defects of the prior art, the backpack is integrally of a passive structure, the movement of a human body under various frequencies is met, meanwhile, the relative movement of the backpack and the human body drives a motor to generate power, and the impact effect cannot be generated in the relative movement process of the backpack and the human body.

A load-adjustable constant-force energy-harvesting power generation backpack comprises a backpack connecting plate, a back plate with straps and two sets of balance mechanisms arranged in a mirror image mode, wherein the straps are arranged on one side face of the back plate, the two sets of balance mechanisms are arranged on the other side face of the back plate, and each set of balance mechanism comprises a screw pair, a sliding block, a first guide wheel set, a spring set, a second guide wheel set, a swinging rod and a first flexible rope; the sliding block is connected with a screw nut of the screw pair and can slide up and down, first guide wheel sets are respectively mounted at two ends of the sliding block, the spring sets are arranged in spring protection sleeves mounted at the bottom of the back plate in a sliding mode, the second guide wheel sets are mounted at the upper portion of the back plate, one ends of the swing rods are rotatably mounted on the back plate, the other ends of the swing rods are arranged in sliding grooves of a cross frame on the back plate and can slide transversely, the cross frame is connected with a backpack connecting plate, one end of a first flexible rope is fixed at the upper end of the spring sets, the first flexible rope is wound on guide wheels of the second guide wheel sets and the first guide wheel sets, the other end of the first flexible rope is fixed at the other end of the swing rods, the two swing rods are obliquely arranged, the; in order to ensure that the slide rail can move smoothly, the movement range of the swing rod is 45 degrees up and down the middle position.

The adjustable constant force mechanism comprises a first flexible rope and a first guide wheel group, and is characterized by further comprising two adjustable constant force mechanisms and two power generation mechanisms which are arranged on the other side surface of the back plate and are respectively arranged in a mirror image mode, wherein each adjustable constant force mechanism comprises a second flexible rope and a third guide wheel group; one ends of the two swing rods are arranged adjacent to each other and are arranged below the cross frame; the third guide wheel set is arranged at the bottom of the back plate, one end of a second flexible rope is fixedly connected with the sliding block, the second flexible rope bypasses the third guide wheel set, and the other end of the second flexible rope is connected with the lower end of the spring set; each power generation mechanism comprises a motor, a first belt wheel, a second belt wheel and a transmission belt, the motor is installed at the top of the back plate, the first belt wheel is installed on an output shaft of the motor, the second belt wheel is installed on the back plate, the first belt wheel and the second belt wheel are in transmission through the transmission belt, and the straight transmission belt is fixed on the backpack connecting plate at one point.

Compared with the prior art, the invention has the beneficial effects that:

the invention adopts a symmetrical adjustable constant force mechanism, can adapt to the requirements of different loads, can adjust the balance effect of the device by changing the position of the adjusting slide block on the screw rod, has compact structure, stable and reliable adjustment, small volume of the whole device and light weight, and meets the performance index requirements of light weight and high maneuverability.

The whole backpack is of a passive structure, meets the requirement of the motion of a human body under various frequencies, ensures that the backpack is static relative to the ground, and reduces the impact of inertia force on the human body. The human body does not feel tired when running or walking for a long distance.

Under the condition of not interfering the movement of the human body, the relative movement of the backpack and the human body drives the motor to generate power, and the motor can be used as a damper to ensure that the backpack and the human body do not generate impact action in the relative movement process.

The technical scheme of the invention is further explained by combining the drawings and the embodiment:

drawings

FIG. 1 is a perspective view of the present invention as viewed from the direction of the backpack body;

FIG. 2 is a perspective view of the present invention as viewed from the direction of the main body of the harness;

FIG. 3 is a front view of the structure of the present invention with the backpack body removed;

FIG. 4 is an exploded view of the present invention with the backpack body removed;

FIG. 5 is a schematic structural view of the slide rail assembly;

fig. 6 is a working principle diagram of the present invention.

Detailed Description

Referring to fig. 1 to 4, the load-adjustable constant-force energy harvesting and generating backpack of the present embodiment includes a backpack connecting plate 2, a back plate 1 with straps 1-1, and two balancing mechanisms arranged in a mirror image manner, wherein the straps 1-1 are arranged on one side surface of the back plate 1, the two balancing mechanisms are arranged on the other side surface of the back plate 1, and each balancing mechanism includes a screw pair 3, a slider 4, a first guide wheel set 5, a spring set 6, a second guide wheel set 7, a swing rod 8, and a first flexible rope 9; the sliding block 4 is connected with a screw nut of the screw pair 3 and can slide up and down, the two ends of the sliding block 4 are respectively provided with a first guide wheel set 5, the spring set 6 is arranged in a spring protection sleeve 10 arranged at the bottom of the back plate 1 in a sliding manner, the second guide wheel set 7 is arranged at the upper part of the back plate 1, one end of the swing rod 8 is rotatably arranged on the back plate 1, the other end of the swing rod 8 is arranged in a sliding groove of a cross frame on the back plate 1 and can slide transversely, the cross frame is connected with the backpack connecting plate 2, one end of a first flexible rope 9 is fixed at the upper end of the spring set 6, the first flexible rope 9 is wound on guide wheels of the second guide wheel set 7 and the first guide wheel set 5, the other end of the first flexible rope 9 is fixed at the other end of the swing rod 8, the two swing rods 8 are obliquely arranged;

the adjustable constant force mechanism comprises a first flexible rope 13, a second flexible rope 14, a third guide wheel group 14 and two adjustable constant force mechanisms which are arranged on the other side surface of the back plate 1 and are arranged in a mirror image mode respectively; one ends of the two swing rods 8 are arranged adjacent to each other and are arranged below the cross frame; the third guide wheel set 14 is arranged at the bottom of the back plate 1, one end of the second flexible rope 13 is fixedly connected with the sliding block 4, the second flexible rope 13 bypasses the third guide wheel set 14, and the other end of the second flexible rope 13 is connected with the lower end of the spring set 6; each power generation mechanism comprises a motor 16, a first belt wheel 17-1, a second belt wheel 17-2 and a transmission belt, the motor 16 is installed at the top of the back plate 1, the first belt wheel 17-1 is installed on an output shaft of the motor 16, the second belt wheel 17-2 is installed on the back plate 1, the first belt wheel 17-1 and the second belt wheel 17-2 are transmitted through the transmission belt, and one point of the straight transmission belt is fixed on the backpack connecting plate 2 through a screw.

In the embodiment, the constant force mechanism with adjustable balance force is arranged in the gap between the back plate 1 and the backpack connecting plate 2, the spring group 6 is pulled by the first flexible rope 9, and the direction of the flexible rope 9 is changed under the action of the first guide wheel group 5 and the second guide wheel group 7. The first flexible rope 9 is mainly used for adjusting the balance load, and when a human body moves, the backboard 1 and the backpack connecting plate 2 generate relative displacement to pull the spring group 6 to move up and down. The height of the sliding block 4 is changed, so that the weight of the balancing object is changed, and the position of the sliding block 4 can be changed by adjusting a rotating nut on the screw rod pair 3.

Two motors 16 are fixed on a back plate 1, a first belt wheel 17-1 is fixed on a motor shaft, the first belt wheel 17-1 is sleeved with a second belt wheel 17-2 on the back plate 1 through a transmission belt, one point in the middle of the transmission belt is fixed on a backpack connecting plate 2 through screws and nuts, when a backpack main body 21 and a human body generate relative motion, the belt is driven to move, the motors 16 are further driven to rotate, the motors 16 are in a power generation mode at the moment, the motors 16 have two functions, one function is to recover energy consumed by the human body, and the other function is to serve as a damper to prevent the backpack connecting plate from rapidly moving due to sudden motion of the human body to form impact on the whole machine. The motor 16 has two working states, one is a short circuit state, the damping is the largest at the moment, the other is an open circuit state without damping, when the backpack connecting plate 2 touches the upper travel switch and the lower travel switch, the motor 16 enters the short circuit state, the sudden impact of the load on the human body is reduced to the greatest extent, when the backpack main body 21 runs normally in the middle stroke, the motor 16 is in the open circuit state, and the load keeps still with the ground at the moment.

Optionally, for a set of balancing mechanisms: one end of the first flexible rope 9 is connected with the spring group 6 (such as 2 spiral springs) through the triangular connecting plate 22, and the other end of the first flexible rope bypasses the second guide wheel group 7 (such as 2 guide wheels) on the back plate 1 to the first guide wheel group 5 (such as 1 guide wheel) on the screw pair 3 and is finally connected with the other end of the swing rod 8. When the gravity center of the human body moves up and down along with walking or running of the human body, the four spiral springs generate tensile deformation, so that the backpack main body 21 can keep static relative to the ground in the process of human body movement, and the aim of reducing the impact of inertia force on the human body is fulfilled. The comfort and the maneuverability of the human body can be improved, and the backpack can not interfere in the action process.

The function of the second flexible rope 13 is to adjust the initial stretching length of the spring assembly 6 during the process of adjusting the sliding block 4, so that the initial stretching length always meets the requirement of the equation of the constant force balance mechanism, namely the net stretching amount of the spring assembly 6.

Alternatively, as shown in fig. 3 and 4, the cross frame comprises two horizontal sliding rails 11; the other end of the rocker 8 is provided with a guide wheel 15 with a groove, the guide wheel 15 is arranged in a gap between the two horizontal sliding rails 11 which are arranged at intervals, the groove of the guide wheel 15 is attached to the horizontal sliding rails 11, and the backpack connecting plate 2 is arranged on the horizontal sliding rails 11.

Optionally, as shown in fig. 4 and 5, the backpack connecting plate 2 is slidably disposed on the backboard 1 through a sliding rail assembly disposed on the other side surface of the backboard 1, where the sliding rail assembly includes a pulley seat 18, a vertical sliding rail 19 and three pulleys 20; the pulley seat 18 is fixed on the back plate 1, the backpack connecting plate 2 is installed on a vertical sliding rail 19, the vertical sliding rail 19 is clamped and slides by three pulleys 20 installed on the pulley seat 18, the peripheral side surface of one pulley 20 is contacted with the end surface of the vertical sliding rail 19, and the peripheral side surfaces of the other two pulleys 20 are contacted with the front side surface and the rear side surface of the vertical sliding rail 19. Further, the vertical slide rail 19 is integrally formed with the horizontal slide rail 11.

Further, as shown in fig. 4, the V-shaped guide wheel 15 rolls on the V-shaped horizontal slide rail 11 to swing the swing rod 8, and further drives the backpack connecting plate 2 to move up and down, the backpack connecting plate 2 clamps the vertical slide rail 19 through the three pulleys 20 to realize vertical movement relative to the backboard 1, the positioning is accurate, the friction force is reduced, the movement precision is greatly improved, two groups of spring groups 6 (spiral extension springs) with large rigidity coefficients are respectively installed on two sides of the other side surface of the backboard 1, and the spring protection covers 10 are installed on the outer sides of the spring groups 6 to ensure that the spring groups 6 are always kept in a vertical state in the pulling process. The two swing rods 8 are assembled on the back plate 1 through bearings and clamp springs on the swing rod shafts respectively to enable the swing rods to rotate freely, the first flexible rope 9 is restrained by the second guide wheel set 7 to change the direction, and the spring sets 6 are connected with the triangular connecting plate 22 together to form a symmetrical balance mechanism from left to right.

As an example: the screw pair 3 is fixedly connected on the back plate 1 through screws and nuts, the second guide wheel set 7 and the third guide wheel set 14 are installed on the back plate 1 through screws carried by the second guide wheel set and the third guide wheel set, the first guide wheel set 5 and the sliding block 4 are assembled through a pin shaft and a clamp spring, and guide wheels on the first guide wheel set 5, the second guide wheel set 7 and the third guide wheel set 14 can freely rotate.

Furthermore, in the above embodiment, the back plate 1 and the backpack connecting plate 2 are made of carbon fiber. Carbon fiber material is light and good with toughness, and the material of horizontal slide rail 11 and vertical slide rail 19 is the aluminum alloy, and spring protection sleeve 10 is the nylon materials. The aluminum alloy has high strength and light weight. The whole weight of the device manufactured by the materials is less than 3.5kg, and the load capacity can be in the range of 5kg-25 kg. In order to improve the comfort of the backpack user, a protective pad for supporting the back is also paved on one side surface of the back plate 1.

Principle of operation

As shown in fig. 6, when x is the net spring extension, there are:

Mga＝Kab

wherein a is the distance from the pulley of the first pulley block 5 to the axle center of the swinging rod 8, b is the length of the swinging rod 8, g is the gravity acceleration, K is the spring stiffness coefficient, and M is the load mass.

After the initial balance state is adjusted, namely x is the net tensile length of the spring, under the same mass state, in the process that the load moves around the shaft of the swinging rod 8, the load and the external force are constantly equal to 0, and the gravity balance requirement is met. The lower tail end of the spring is connected with the third guide wheel set 14 through the second flexible rope 13, a closed loop is formed integrally, the stretching amount of the spring can be changed by the position of the first pulley block 5, the net stretching amount of the spring is ensured to be x, and loads of different masses can be balanced. On the other hand, since the load is hung on the backpack connecting plate 2, the movement form will rotate along the swing axis due to the swing of the swing lever 8, but since the load basically moves only in the vertical direction during the up-and-down movement of the human body, the movement of the load needs to be decomposed into the X-direction and the Y-direction movements.

The present invention is not limited to the above embodiments, and those skilled in the art can make various changes and modifications without departing from the scope of the invention.