A power drive system and power assisted equipment

Abstract

The utility model relates to the technical field of exercise equipment manufacturing, especially a power drive system and power assisting equipment. As for the power drive system, the walking mechanism includes the active walking roller and N driven walking rollers. The motor is hidden in the active walking roller. The transmission mechanism includes at least one primary transmission belt and at least one secondary transmission belt. The primary transmission belt is arranged between the active walking roller and any driven walking roller, and the force transmission is realized through the secondary transmission belt between the adjacent driven walking rollers. In this way, on the one hand, the motor is integrated in the active walking roller, which greatly reduces the overall occupied space of the power drive system, effectively improves the convenience of equipment wearing or operation, and helps to simplify the assembly process and reduce the production cost. On the other hand, the design of the stepped transmission ensures efficient power transmission, significantly improves the stability, safety and reliability of the equipment running in complex terrain environment.

Description

Technical Field

[0001] This utility model relates to the field of sports equipment manufacturing technology, and in particular to a power drive system and power assist equipment. Background Technology

[0002] In various mobile devices (such as smart wearable devices and mobility aids), the power drive system is the core component for achieving autonomous mobility. Its structural rationality and power transmission efficiency directly affect the device's operating performance, space occupation, and user experience. Currently, in the industry, the motor, as the power source, is typically installed independently outside the walking mechanism (such as the roller assembly) and connected to it via a transmission mechanism such as a gear set, drive belt, or drive shaft. However, this design layout has the following drawbacks: Firstly, the separate design of the motor and the walking mechanism inevitably increases the overall size and assembly complexity of the mobile device, thus affecting the ease of wearing or operation, especially in devices with high space requirements (such as electric assistive shoes); secondly, when the walking mechanism contains multiple rollers, if a single drive belt is used to drive all the rollers, problems such as slippage and high power loss are likely to occur due to excessively long transmission paths or uneven force distribution, while using multiple sets of independent transmission components will further increase the system weight and cost.

[0003] In addition, in some multi-roller drive systems, the power distribution between the rollers lacks precise coordination, which can easily lead to excessive load or insufficient driving force on individual rollers, resulting in a decrease in equipment operation stability. This may affect the safety and reliability of the equipment, especially in complex terrains (such as slopes and uneven roads).

[0004] In summary, technical personnel are urgently needed to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a power drive system that solves the problems of excessive overall size and high assembly complexity of power-assisted equipment caused by the separate layout of the motor and the walking mechanism in the existing design, which in turn affects the ease of wearing.

[0006] This utility model relates to a power drive system, including a motor, a transmission mechanism, and a walking mechanism; the motor serves as the core power source to output assist kinetic energy, which is transmitted to the walking mechanism through the transmission mechanism; the walking mechanism includes an active walking roller and N driven walking rollers, where N is a positive integer; the motor is concealed within the active walking roller; the transmission mechanism includes at least one primary transmission belt and at least one secondary transmission belt; the primary transmission belt is wound between the active walking roller and any driven walking roller, and the force is transmitted between adjacent driven walking rollers through the secondary transmission belt; the active walking roller and the driven walking roller rotate together to generate a force with respect to the ground.

[0007] As a further improvement to the technical solution disclosed in this utility model, N=2; both driven rollers are located on one side of the driving roller along the walking direction; the number of primary transmission belts is 1, the number of secondary transmission belts is 2, and the two secondary transmission belts are symmetrically arranged on both sides of the primary transmission belt.

[0008] As a further improvement to the technical solution disclosed in this utility model, the outer peripheral surface of the active walking roller is provided with an active primary groove for adapting to the primary transmission belt; the outer peripheral surface of the driven walking roller, which is connected to the active walking roller through the primary transmission belt, is provided with a driven primary groove for adapting to the primary transmission belt and a driven secondary groove for adapting to the secondary transmission belt; the outer peripheral surfaces of the other driven walking rollers are also provided with driven secondary grooves to adapt to the secondary transmission belt.

[0009] As a further improvement to the technical solution disclosed in this utility model, after the primary transmission belt and the secondary transmission belt are assembled, they are respectively embedded in the corresponding active primary groove, driven primary groove and driven secondary groove, and neither the primary transmission belt nor the secondary transmission belt contacts the ground during the movement.

[0010] As a further improvement to the technical solution disclosed in this utility model, both the primary transmission belt and the secondary transmission belt are preferably synchronous belts, and the active primary groove, the driven primary groove and the driven secondary groove are all provided with toothed structures for implementing synchronous driving.

[0011] As a further improvement to the technical solution disclosed in this utility model, the motor is preferably a DC servo motor, and the output shaft of the motor is coaxial with the axle of the active walking roller.

[0012] As a further improvement to the technical solution disclosed in this utility model, the active walking roller and the driven walking roller have shock absorption function.

[0013] As a further improvement to the technical solution disclosed in this utility model, the active walking roller is composed of a wheel core, an elastic damping layer, and a wheel rim in sequence along the radial direction; the elastic damping layer is made of polyurethane material.

[0014] Of course, as another modified design of the above technical solution, at least three compression springs are evenly distributed circumferentially between the wheel core and the wheel rim of the active walking roller; the two ends of the compression springs are fixedly connected to the outer peripheral wall of the wheel core and the inner wall of the wheel rim, respectively, and the spring constant of the compression springs is 50 to 150 N / m.

[0015] In addition, this utility model also discloses a power-assisted device, including a pressure-bearing body, a pedal, and a power drive system; wherein, the power drive system is installed at the bottom of the pressure-bearing body; the pedal, as a support component for the user to step on directly, is fixed on the pressure-bearing body; part of the wheels of the active walking roller and the driven walking roller protrude from the bottom of the pressure-bearing body; when the power drive system is started, the active walking roller and the driven walking roller contact the ground and generate driving force.

[0016] In practical applications, the power drive system disclosed in this utility model can achieve at least the following beneficial technical effects, specifically: 1) By concealing the motor inside the active walking rollers, a high degree of integration between the power source and the walking mechanism is achieved, thereby significantly reducing the space occupied by the power drive system. This is especially suitable for devices with stringent space requirements, such as electric-assisted shoes, and significantly improves the ease of wearing. At the same time, the integrated design reduces additional connecting parts, simplifies the assembly process, and reduces the difficulty and cost of manufacturing. 2) The adoption of a multi-stage transmission structure combining primary and secondary drive belts avoids problems such as slippage and power loss caused by excessively long transmission paths and uneven force distribution in traditional designs. This ensures efficient power transmission while effectively controlling the weight and cost of the power drive system. Even when facing complex terrains such as slopes and uneven surfaces, it reduces situations where individual active or driven rollers are overloaded or lack sufficient driving force, thus significantly improving the stability, safety, and reliability of the power-assisted equipment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the paired application state of the power-assisted equipment disclosed in this utility model.

[0019] Figure 2 This is a three-dimensional schematic diagram of the power-assisted equipment disclosed in this utility model from one perspective.

[0020] Figure 3 This is a three-dimensional schematic diagram of the power-assisted equipment disclosed in this utility model from another perspective.

[0021] Figure 4 This is a three-dimensional schematic diagram of the power drive system in the power-assisted equipment disclosed in this utility model.

[0022] Figure 5 This is a three-dimensional schematic diagram of the active walking roller in the power-assisted equipment disclosed in this utility model.

[0023] Figure 6 This is a three-dimensional schematic diagram of the rear-mounted driven walking roller in the power-assisted equipment disclosed in this utility model.

[0024] Figure 7 This is a three-dimensional schematic diagram of the front-mounted driven walking roller in the power-assisted equipment disclosed in this utility model.

[0025] 1-Pressure bearing body; 2-Pedal; 3-Power drive system; 31-Transmission mechanism; 311-Primary transmission belt; 312-Left secondary transmission belt; 313-Right secondary transmission belt; 32-Traveling mechanism; 321-Active traveling roller; 3211-Active primary groove; 322-Rear driven traveling roller; 3221-Rear driven primary groove; 3222-Rear driven secondary groove; 323-Front driven traveling roller; 3231-Front driven secondary groove; 33-Mobile power supply. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to specific embodiments. Figure 1 The diagram shows the paired application state of the power-assisted equipment disclosed in this utility model. It can be seen that it is composed of a left-positioned power-assisted device and a right-positioned power-assisted device. The two are symmetrical in structure and can correspond to the user's left foot and right foot respectively, forming a walking assistance system that provides coordinated assistance.

[0027] From the perspective of the structure of a single power assist device (such as...) Figure 2 , Figure 3 As shown in the diagram, its core components include a pressure-bearing body 1, a pedal 2, and a power drive system 3. The pressure-bearing body 1, as the basic load-bearing component of the entire equipment, is made of high-strength lightweight alloy or engineering plastic materials, ensuring structural stability while effectively controlling the overall weight. The pedal 2 is detachably fixed above the pressure-bearing body 1, providing the user with comfortable and stable foot support.

[0028] like Figure 3 As shown, the power drive system 3 is installed at the bottom of the pressure-bearing body 1 and is the key part for realizing power output. In this embodiment, the power drive system 3 mainly consists of a motor (not shown), a transmission mechanism 31, and a walking mechanism 32. Among them, the motor serves as the core power source to output assist kinetic energy, which is transmitted to the walking mechanism 32 through the transmission mechanism 31.

[0029] like Figure 4As shown, the walking mechanism 32 adopts a "1+2" ​​roller combination pattern, namely one active walking roller 321, a rear driven walking roller, and a front driven walking roller 323. The active walking roller 321 is located at the rear end of the bottom of the pressure body 1 (towards the heel bone of the foot), while the rear driven walking roller 322 and the front driven walking roller 323 are arranged sequentially in front of the active walking roller 321 along the walking direction, and the three are arranged linearly. The transmission mechanism 31 includes a primary transmission belt 311, a left-side secondary transmission belt 312, and a right-side secondary transmission belt 313. Figures 4-7 As shown, the primary drive belt 311 is wound between the active travel roller 321 and the rear driven travel roller 322. The active primary groove 3211 on the outer circumference of the active travel roller 321 and the rear driven primary groove 3221 on the outer circumference of the rear driven travel roller 322 are adapted to the primary drive belt 311 to ensure the accuracy of power transmission. The left-side secondary drive belt 312 and the right-side secondary drive belt 313 are symmetrically distributed on both sides of the primary drive belt 311. The left-side secondary drive belt 312 spans the rear driven secondary groove 3222 (left) of the rear driven roller 322 and the front driven secondary groove 3231 (left) of the front driven roller 323. The right-side secondary drive belt 313 spans the rear driven secondary groove 3222 (right) of the rear driven roller 322 and the front driven secondary groove 3231 (right) of the front driven roller 323.

[0030] When the power drive system 3 starts running, the motor drives the active walking roller 321 to rotate, which in turn drives the rear driven walking roller 322 to rotate via the primary transmission belt 311. The rear driven walking roller 322 then drives the front driven walking roller 323 to rotate via the left secondary transmission belt 312 and the right secondary transmission belt 313. The active walking roller 321, the rear driven walking roller 322, and the front driven walking roller 323 rotate in tandem, contacting the ground to generate driving force and propelling the power-assisted equipment forward. Due to the adoption of a graded transmission structure, the speeds of the active walking roller 321, the rear driven walking roller 322, and the front driven walking roller 323 are consistent, resulting in even power distribution. Even on slopes or slippery surfaces, the stability of the equipment operation is guaranteed, effectively preventing slippage or insufficient driving force. Furthermore, by Figure 3As can be clearly seen in the diagram, after assembly, the primary drive belt 311, the left secondary drive belt 312, and the right secondary drive belt 313 are all embedded in their corresponding active primary groove 3211, rear driven primary groove 3221, front driven secondary groove 3231, and rear driven secondary groove 3222, and do not contact the ground during the entire journey. This effectively eliminates wear on the primary drive belt 311, the left secondary drive belt 312, and the right secondary drive belt 313, and significantly extends their service life.

[0031] As a further optimization of the above technical solution, both the primary transmission belt 311 and the secondary transmission belt are preferably synchronous belts, and the active primary groove 3211, the rear driven primary groove 3221, the rear driven secondary groove 3222, and the front driven secondary groove 3231 are all provided with toothed structures that match the synchronous belt. In this way, slippage during transmission can be effectively prevented in practical applications, and the power transmission efficiency of the power drive system 3 can be improved to a certain extent.

[0032] The motor is preferably a DC servo motor, integrated into the cavity of the active walking roller 321, and the motor's output shaft is coaxially arranged with the axle of the active walking roller 321 (depending on the specific situation, the motor can also be integrated into the rear driven walking roller 322 or the front driven walking roller 323). The motor is powered by a mobile power supply 33 installed at the bottom of the pressure body 1. The mobile power supply 33 uses a high-capacity lithium battery, with a battery life of 0.5 to 1 hour, and supports fast charging to meet the needs of daily long-term use.

[0033] In terms of shock absorption performance, the active walking roller 321, the rear-mounted driven walking roller 322, and the front-mounted driven walking roller 323 all employ an elastic shock-absorbing layer design. Taking the active walking roller 321 as an example, it is composed of a wheel core, an elastic shock-absorbing layer, and a wheel rim sequentially nested along the radial direction (not shown in the figure). The elastic shock-absorbing layer is made of polyurethane material with good elasticity and wear resistance, which can effectively absorb the impact force of the ground during walking. Tests have shown that on uneven road surfaces, this shock-absorbing structure can reduce the vibration transmitted to the human body by 40-50%, significantly improving the comfort of wearing and using the roller.

[0034] Of course, as another modified design of the above technical solution, at least three compression springs are evenly distributed circumferentially between the wheel core and the rim of the active walking roller 321, the rear driven walking roller 322, and the front driven walking roller 323. Taking the active walking roller 321 as an example, four compression springs are arranged at equal angular intervals between the outer circumferential wall of its wheel core and the inner wall of the rim to ensure that the active walking roller 321 receives uniform cushioning when subjected to impact forces from all directions. The spring constant is set in the range of 50 to 150 N / m. When the active walking roller 321 encounters a slight ground protrusion, the spring with a relatively small spring constant can deform quickly, providing a gentle cushioning effect; while when facing a more obvious uneven road surface, the spring can provide sufficient support to prevent the active walking roller 321 from excessively deforming and affecting normal walking. Actual testing showed that the roller with this compression spring damping structure has a damping effect comparable to that of the elastic damping layer design in complex terrain, and it has a longer service life and is easier to maintain. When a spring is damaged, only that spring needs to be replaced, without having to disassemble and replace the entire active walking roller 321.

[0035] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power drive system, comprising a motor, a transmission mechanism, and a walking mechanism; wherein the motor serves as a core power source to output assist kinetic energy, and transmits it to the walking mechanism through the transmission mechanism, characterized in that, The walking mechanism includes an active walking roller and N driven walking rollers, where N is a positive integer; the motor is hidden in the active walking roller; the transmission mechanism includes at least one primary transmission belt and at least one secondary transmission belt; the primary transmission belt is wound between the active walking roller and any of the driven walking rollers, and the force is transmitted between adjacent driven walking rollers through the secondary transmission belt; the active walking roller and the driven walking roller rotate together to generate a force with respect to the ground.

2. The power drive system according to claim 1, characterized in that, N=2; both driven rollers are located on one side of the driving roller along the walking direction; the number of primary transmission belts is 1, the number of secondary transmission belts is 2, and the two secondary transmission belts are symmetrically arranged on both sides of the primary transmission belt.

3. The power drive system according to claim 1, characterized in that, The outer circumferential surface of the active walking roller is provided with an active primary groove for adapting to the primary transmission belt; the outer circumferential surface of the driven walking roller, which is connected to the active walking roller via the primary transmission belt, is provided with a driven primary groove for adapting to the primary transmission belt and a driven secondary groove for adapting to the secondary transmission belt; the outer circumferential surfaces of the other driven walking rollers are also provided with driven secondary grooves to adapt to the secondary transmission belt.

4. The power drive system according to claim 3, characterized in that, After assembly, the primary and secondary drive belts are respectively embedded in the corresponding primary active groove, the secondary passive groove, and the tertiary passive groove, and neither the primary nor the secondary drive belts contact the ground during travel.

5. The power drive system according to claim 3, characterized in that, Both the primary and secondary transmission belts are synchronous belts, and the primary active groove, the secondary passive groove, and the secondary passive groove are all provided with toothed structures for synchronous driving.

6. The power drive system according to claim 1, characterized in that, The motor is a DC servo motor, and the output shaft of the motor is coaxial with the axle of the active walking roller.

7. The power drive system according to claim 1, characterized in that, Both the active and passive walking rollers have shock absorption functions.

8. The power drive system according to claim 7, characterized in that, Along the radial direction, the active walking roller is sequentially composed of a wheel core, an elastic damping layer, and a wheel rim; the elastic damping layer is made of polyurethane material.

9. The power drive system according to claim 7, characterized in that, At least three compression springs are evenly distributed circumferentially between the wheel core and the wheel rim of the active walking roller; the two ends of the compression springs are fixedly connected to the outer peripheral wall of the wheel core and the inner wall of the wheel rim, respectively, and the spring constant of the compression springs is 50 to 150 N / m.

10. A power-assisted device, characterized in that, It includes a pressure-bearing body, a pedal, and a power drive system as described in any one of claims 1-9; wherein the power drive system is installed at the bottom of the pressure-bearing body; the pedal serves as a support component that the user directly steps on and is fixed to the pressure-bearing body; and portions of the active walking roller and the driven walking roller protrude from the bottom of the pressure-bearing body.

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