Power output torque sensing mechanism

Abstract

The present application relates to a power output torque sensing mechanism, which is provided with an input group and an output group driven by the input group at both ends of a shaft, and the feature of the present application is that a torsion connecting shaft group is arranged between the input group and the output group for detecting the rotary torque value and transmitting it in a wired manner, so that the torque value can be detected and transmitted in a fine and accurate manner, and the subsequent auxiliary power input is more real-time and accurate, and the structure can be effectively simplified, and the manufacturing and maintenance are easy, and the overall cost can be further reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to a power output torque detection technology, in particular to a power output torque sensing mechanism capable of detecting fine and accurate torque values and transmitting the detected signals in a wired manner, so that when the torque change of the rotating shaft is detected, the output can be reliable and accurate through wired transmission, avoiding distortion caused by noise interference when transmitting torque values wirelessly, and improving the reliability and accuracy of signal transmission, and simplifying the structure to further reduce the manufacturing and maintenance costs. BACKGROUND

[0002] The output of rotational kinetic energy can be used for rotating objects. During the process of inputting power to kinetic energy output, the reaction force is generated due to the weight of the object, the slope of the climb or the load, etc. At this time, the power input of the original driving unit needs to be increased or another auxiliary power needs to be provided to keep the rotational kinetic energy smooth and stable. For example, in a power-assisted bicycle or an electric bicycle, the conventional torque sensing mechanism used to detect whether auxiliary power needs to be input is mainly a strain gauge attached to the surface of the crankshaft. When the crankshaft is pedaled by the left and right cranks, it will produce torsional deformation, allowing the strain gauge to detect the strain of the crankshaft, and using wireless transmission signals to control the output power of the auxiliary motor through a receiver to assist the rider in climbing to achieve the effect of saving effort.

[0003] However, in the above structure, the instability of wireless transmission interference or obstruction will affect the output of the auxiliary motor. For example, when the received torque value is reduced due to wireless transmission distortion, it will not be able to effectively provide the corresponding auxiliary power in real time. Conversely, when the received torque value is too large due to wireless transmission distortion, it will cause the auxiliary power to be output too hard, which may cause the problem of violent impact due to excessive auxiliary power, making the vehicle unable to run smoothly, and at the same time, there is a feedback lag phenomenon, so that the auxiliary power cannot be generated in real time and accurately.

[0004] Therefore, many industries have developed various designs to solve the problem of torque transmission distortion. However, since the above mechanism is a rotating motion, the torque sensing assembly (strain gauge) used to detect the rotational torque value still uses wireless transmission to output the torque value signal, which is still prone to interference or obstruction, causing the torque value to be distorted due to noise interference, and thus the subsequent auxiliary power input also has errors, affecting the accuracy, real-time performance and accuracy of power assistance. In order to solve the problem of wireless transmission of torque value signals, some manufacturers use carbon brush principles for signal transmission, but the structure is complex and the manufacturing precision is high, making it difficult to produce and maintain, which increases the overall cost.

[0005] In other words, due to the imperfect design of the signal transmission of the sensing assembly (strain gauge), the torque value feedback is distorted or delayed, which makes the auxiliary power unable to be accurately and timely inputted, and thus loses the auxiliary effect. How to overcome the above problems is expected by the industry and users, and is also the purpose of the present application.

[0006] Therefore, the present application is developed to overcome the above problems caused by the transmission, and the main purpose of the present application is to provide a power output torque sensing mechanism, which can transmit the detected signal of the torque value by wired transmission to avoid distortion caused by noise interference when transmitting the torque value. SUMMARY

[0007] Therefore, the main purpose of the present application is to provide a power output torque sensing mechanism, which can transmit the detected signal of the torque value by wired transmission to avoid distortion caused by noise interference when transmitting the torque value.

[0008] In addition, the secondary main purpose of the present application is to provide a power output torque sensing mechanism, which can reliably and accurately output the torque change of the rotating shaft by wired transmission, so that the subsequent auxiliary power input is more real-time and accurate.

[0009] Furthermore, another main purpose of the present application is to provide a power output torque sensing mechanism, which can effectively simplify the structure, and is easy to manufacture and maintain, and can further reduce the overall cost.

[0010] In addition, the secondary main purpose of the present application is to provide a power output torque sensing mechanism, which can reliably and accurately output the torque change of the rotating shaft by wired transmission, so that the subsequent auxiliary power input is more real-time and accurate.

[0011] Therefore, the present application mainly achieves the above purposes and effects by the following technical means. The present application provides a power output torque sensing mechanism, which comprises:

[0012] a shaft rod;

[0013] an input group having an input shaft sleeve driven by power, the input shaft sleeve is pivotally arranged at one end of the shaft rod, and the end of the input shaft sleeve protrudes a plurality of equidistant convex shaft blocks, and the outer surface of each convex shaft block is formed with an axially extending axial bead groove;

[0014] an output group having an output shaft sleeve driven by the input group, the output shaft sleeve is arranged at the other end of the shaft rod; and

[0015] A torsion connecting shaft set is arranged between the input shaft sleeve and the output shaft sleeve, and at least includes a rotating ring seat, a torque conversion ring seat and a fixed ring seat. One end of the rotating ring seat is fixed to the output shaft sleeve of the output set. The rotating ring seat has a plurality of inclined protrusions protruding from one end of the output shaft sleeve, which can extend into the torque conversion ring seat. The side surface of each inclined protrusion forms an inclined tapered ball groove. The inner edge of the torque conversion ring seat forms a plurality of ball groove seats corresponding to the inclined protrusions of the rotating ring seat. Each ball groove seat has an inclined tapered ball groove corresponding to the inclined tapered ball groove of the rotating ring seat, and is used to clamp a plurality of guide balls. At least one side surface of the fixed ring seat has a strain sensing component. The strain sensing component is connected to a control processing unit arranged outside in a wired manner.

[0016] Therefore, the power output torque sensing mechanism of the present application can convert the rotating torque into axial displacement by the design of the input shaft sleeve protrusion of the input set and the rotating ring seat and the torque conversion ring seat in the torsion connecting shaft set. The strain sensing component arranged on the fixed ring seat can accurately detect the torque value and transmit it in a wired manner, thereby avoiding the distortion caused by noise interference during transmission. The torque change of the rotating shaft can be accurately output in a wired manner, thereby making the subsequent auxiliary power input more real-time and reliable. Furthermore, the structure can be effectively simplified, and the manufacturing and maintenance are easy, thereby reducing the overall cost and greatly improving the practicality. The economic benefits can be further achieved.

[0017] The present application further achieves the above-mentioned purposes and effects by using the following technical means, such as:

[0018] The shaft rod can be a power input shaft. The input shaft sleeve of the input set is arranged on the shaft rod by using a one-way bearing. The output shaft sleeve of the output set protrudes a shaft seat section and an engagement tooth part from one end of the input set. The shaft seat section is provided with a bearing arranged on the inner wall of a fixed housing. The engagement tooth part can be embedded with a tooth disc. The fixed ring seat of the torsion connecting shaft set is also fixed to the fixed housing.

[0019] The shaft rod has a ring flange formed on the side periphery of the output set. The ring flanges have a ball groove formed on the top edge corners of both sides. The output shaft sleeve of the output set has a ball seat arranged on both sides of the ring flange, which is used to clamp a plurality of guide balls, thereby improving the smoothness and stability of the rotation of the output shaft sleeve. The shaft rod has a ring buckle groove formed on the side periphery of the input set, which is used to buckle a buckle ring at the end of the input shaft sleeve of the input set, thereby limiting the position of the input set.

[0020] The convex shaft blocks corresponding to the torsion connecting shaft group on the input shaft sleeve are formed at the end of the shaft seat section of the input shaft sleeve, and the side surface of the root of each convex shaft block is formed with a clamping step, and the bead groove seat of the torsion conversion ring seat is provided with a clamping step corresponding to the clamping step of the input shaft sleeve, so that the torsion conversion ring seat can be positioned on the input shaft sleeve.

[0021] The fixed ring seat of the torsion connecting shaft group is provided with a first ring bead seat on the side corresponding to the torsion conversion ring seat by means of a plurality of claw blocks, and the opposite side of the first ring bead seat and the torsion conversion ring seat is respectively formed with a bead groove for matching and clamping a series of balls, so that the torsion conversion ring seat can rotate smoothly relative to the fixed fixed ring seat.

[0022] The fixed ring seat of the torsion connecting shaft group is provided with a second ring bead seat on the side corresponding to the input group, and the input shaft sleeve of the input group is provided with a corresponding third ring bead seat, and the opposite side of the second and third ring bead seats is respectively formed with a bead groove for matching and clamping a series of balls, so that the input group can rotate smoothly relative to the fixed fixed ring seat.

[0023] In order to further understand the constitution, features and other purposes of the present application, the preferred embodiments of the present application are listed below, and the detailed description is as follows, and the general skilled in the art can be implemented. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a three-dimensional appearance schematic diagram of the power output torsion sensing mechanism of the present application.

[0025] Figure 2 It is a three-dimensional exploded schematic diagram of the power output torsion sensing mechanism of the present application, for explaining the state of each component and its relative relationship.

[0026] Figure 3 It is a side view cross-sectional schematic diagram of the power output torsion sensing mechanism of the present application after assembly.

[0027] Figure 4 It is a partial three-dimensional exploded schematic diagram of the power output torsion sensing mechanism of the present application.

[0028] Figure 5 It is a partial three-dimensional assembled schematic diagram of the power output torsion sensing mechanism of the present application.

[0029] Figure 6 It is another partial three-dimensional assembled schematic diagram of the power output torsion sensing mechanism of the present application.

[0030] Figure 7 It is a partial side view cross-sectional schematic diagram of the power output torsion sensing mechanism of the present application in Figure 5 .

[0031] Figure 8 is a partial end view cross-sectional diagram of the power output torque sensing mechanism of the present invention. Figure 5

[0032] Figure 9 is a side view diagram of the power output torque sensing mechanism of the present invention in the process of torque value detection.

[0033] BRIEF DESCRIPTION OF DRAWINGS: 10 - shaft; 11 - ring flange; 111 - ball groove; 112 - ball groove; 15 - ring buckle groove; 20 - input group; 21 - input shaft sleeve; 22 - one-way bearing; 23 - buckle ring; 24 - shaft seat section; 25 - convex shaft block; 26 - embedded card step; 27 - axial ball groove; 30 - output group; 31 - ball bowl seat; 310 - ball; 32 - ball bowl seat; 320 - ball; 35 - output shaft sleeve; 36 - shaft seat section; 37 - meshing tooth part; 38 - bearing; 50 - torsion connecting shaft group; 51 - rotating ring seat; 511 - inclined convex block; 512 - inclined tapered ball groove; 52 - torsion conversion ring seat; 521 - ball groove seat; 522 - inclined tapered ball groove; 523 - universal ball; 524 - embedded card step; 525 - axial ball groove; 526 - guide ball; 528 - ball groove; 53 - first ring ball seat; 531 - ball groove; 535 - ball; 55 - fixed ring seat; 551 - claw block; 56 - strain sensing assembly; 57 - second ring ball seat; 571 - ball groove; 58 - third ring ball seat; 581 - ball groove; 585 - ball. DETAILED DESCRIPTION

[0034] The present invention provides a power output torque sensing mechanism, and the specific embodiments of the present invention and its components are illustrated in the accompanying drawings. All references to front and back, left and right, top and bottom, upper and lower, and horizontal and vertical are for convenience in describing the application and limiting the application to any particular position or spatial orientation. The dimensions specified in the drawings and the description can be varied according to the design and requirements of the present invention without departing from the scope of the application.

[0035] The power output torque sensing mechanism of the present invention is composed of, as shown in Figure 1 , Figure 2 , an input group 20 and an output group 30 driven by the input group 20 at both ends of a shaft 10. The feature of the present invention is that a torsion connecting shaft group 50 is provided between the input group 20 and the output group 30 for agile and accurate detection of rotational torque values and real-time accurate transmission in a wired manner.

[0036] The detailed composition of each main component of the present invention is as follows: Figure 2 , Figure 3 ​As shown, the shaft 10 can be a power input shaft (such as the crankshaft of a power-assisted bicycle) or a fixed shaft (such as the power module shaft of an electric bicycle), and a ring flange 11 is formed on the side of the shaft 10 corresponding to the side of the output set 30, and a bead groove 111, 112 is formed on the top corner of the two sides of the ring flange 11, respectively, for the output set 30 to be pivoted, and a ring buckle groove 15 is formed on the side of the shaft 10 corresponding to the side of the input set 20, for limiting the position of the input set 20;

[0037] The input set 20 uses a one-way bearing 22 to provide an input shaft sleeve 21 on the shaft 10, and the input shaft sleeve 21 is limited on the shaft 10 by a buckle ring 23 buckled on the ring buckle groove 15 (the buckle ring 23 is buckled and limited after all components are assembled), and the input shaft sleeve 21 protrudes a shaft seat section 24 on one end corresponding to the torsion connecting shaft set 50, and the input shaft sleeve 21 protrudes a plurality of equidistant protruding shaft blocks 25 on the end of the shaft seat section 24, which can extend into the torsion connecting shaft set 50 (such as Figure 4 、 Figure 5 As shown), the input shaft sleeve 21 of the present application is preferably embodied by four equidistant protruding shaft blocks 25, and the side of the root of each of the plurality of protruding shaft blocks 25 opposite to the direction of rotation of the one-way bearing 22 is formed with a clamping step 26 for positioning the torsion connecting shaft set 50, and the outer edge surface of each of the plurality of protruding shaft blocks 25 is formed with an axially extending axial bead groove 27;

[0038] The output set 30 has an output shaft sleeve 35 provided on the shaft 10, and the inner part of the output shaft sleeve 35 is pivoted on the shaft 10 by two bead bowl seats 31, 32 corresponding to the two sides of the ring flange 11 of the shaft 10, and a series of balls 310, 320 are respectively clamped between the two bead bowl seats 31, 32 and the bead grooves 111, 112 of the ring flange 11, so that the output shaft sleeve 35 can rotate smoothly and smoothly on the shaft 10, and the output shaft sleeve 35 protrudes a shaft seat section 36 and an engagement tooth part 37 on one end opposite to the input set 20, wherein the shaft seat section 36 is provided with a bearing 38 capable of being provided on the inner wall of a fixed housing (the fixed housing can be a five-way pipe of a power-assisted bicycle, etc.), and the engagement tooth part 37 can be provided with a tooth disc (such as a tooth disc of a power-assisted bicycle, etc.) or engaged with the outer edge of an output gear;

[0039] The torsion connecting shaft set 50 at least includes a rotating ring seat 51, a torsion conversion ring seat 52, and a fixed ring seat 55, please further refer to Figure 4 、 Figure 5 and Figure 6As shown, one end of the rotating ring seat 51, which can be fitted onto the shaft 10, is fixed to the output shaft sleeve 35 of the output assembly 30, so as to drive the output shaft sleeve 35 to rotate synchronously. The rotating ring seat 51, at one end different from the output shaft sleeve 35, has multiple equidistant oblique protrusions 511 that can extend into the torque conversion ring seat 52 (e.g., ...). Figure 6 , Figure 7 and Figure 8 As shown), in a preferred embodiment, the number of oblique protrusions 511 of the rotating ring seat 51 corresponds to the number of protrusions 25 of the input shaft sleeve 21. Each oblique protrusion 511 has an oblique tapered ball groove 512 (i.e., a jacking ball groove) formed on a side surface different from the free-rotation direction of the one-way bearing 22. Furthermore, the inner edge of the torque conversion ring seat 52 has multiple ball groove seats 521 (e.g., [missing information]) that can be correspondingly clamped between the protrusions 25 of the input shaft sleeve 21 and the oblique protrusions 511 of the rotating ring seat 51. Figure 5 , Figure 6 and Figure 8 As shown), and each of the bead groove seats 521 of the torque conversion ring seat 52 has a corresponding oblique conical bead groove 522 of the oblique conical bead groove 512 of the rotating ring seat 51, for respectively clamping the plenum beads 523 (as shown). Figure 7 As shown), this allows the torque conversion ring seat 52 to be pushed and displaced during rotation. Furthermore, each of the ball groove seats 521 of the torque conversion ring seat 52 has a corresponding engagement step 524 (e.g., the engagement step 26 of the input shaft sleeve 21). Figure 7 As shown), this allows the torque converter ring seat 52 to be positioned on the input shaft sleeve 21. Furthermore, each of the ball groove seats 521 of the torque converter ring seat 52 has an axial ball groove 525 corresponding to the axial ball groove 27 of the input shaft sleeve 21, for respectively clamping a series of guide balls 526 (such as...). Figure 7The torsion conversion ring seat 52 is capable of being pushed axially sensitively and smoothly, and the fixed ring seat 55 is positioned at the aforementioned fixed housing (which can be a five-way pipe of a power-assisted bicycle, etc.), and a first ring ball seat 53 is clamped on the side of the fixed ring seat 55 corresponding to the torsion conversion ring seat 52 by means of a plurality of claw blocks 551, and the first ring ball seat 53 is formed with a ball groove 531, 528 respectively opposite to the torsion conversion ring seat 52, for clamping a series of balls 535, so that the torsion conversion ring seat 52 can rotate smoothly relative to the fixed fixed ring seat 55, and the side surface of the fixed ring seat 55 corresponding to the torsion conversion ring seat 52 has at least one radially arranged strain sensing component 56 for detecting the deformation amount or axial pushing pressure value of the fixed ring seat 55, and the strain sensing component 56 is connected to a control processing unit (not shown in the figure, such as an auxiliary motor controller of a power-assisted bicycle) arranged outside in a wired manner, and the other side of the fixed ring seat 55 is provided with a second ring ball seat 57, and the shaft seat section 24 of the input shaft sleeve 21 of the input set 20 is provided with a corresponding third ring ball seat 58, and the second and third ring ball seats 57, 58 are formed with a ball groove 571, 581 respectively opposite to each other, for clamping a series of balls 585, so that the input set 20 can rotate smoothly relative to the fixed fixed ring seat 55.

[0040] In this way, the rotational torsion of the input set 20 driving the output set 30 can be detected by the torsion coupling shaft set 50, and the signal of the rotational torsion value is transmitted in a wired manner, thereby forming a power output torsion sensing mechanism capable of agile and accurate detection, no distortion during transmission, and accurate and reliable.

[0041] As for the composition and actual operation of the power output torsion sensing mechanism of the present application, taking a power-assisted bicycle as an example, the shaft rod 10 as the crankshaft is defined as the main input source, and the input set 20 is defined as the auxiliary input source, and as Figure 9 disclosed, when the shaft rod 10 rotates due to pedaling the two-end crank (not shown in the figure), the input shaft sleeve 21 can drive the torsion conversion ring seat 52 of the torsion coupling shaft set 50 through the convex shaft block 25, so that the torsion conversion ring seat 52 and the inclined taper ball grooves 522, 512 and the clamped Puli balls 523 can generate a pressing action, so that the rotating ring seat 51 is driven to rotate synchronously, thereby driving the output shaft sleeve 35 of the output set 30 to rotate, and further driving the toothed disc embedded with the output shaft sleeve 35;

[0042] When the output shaft sleeve 35 of the output set 30 is subjected to the reaction force of the gear disc, the rotating ring seat 51 and the torsion conversion ring seat 52 of the torsion connecting shaft set 50 are also subjected to the reaction force, which causes the torsion conversion ring seat 52 to axially displace toward the fixed ring seat 55, so that the fixed ring seat 55 is pressed, and the strain sensing component 56 on the fixed ring seat 55 can accurately detect the rotational torque value in real time and transmit the value to the external control processing unit (such as the controller of the auxiliary motor) through wired transmission. Thus, the input shaft sleeve 21 of the input set 20 can be actuated by the auxiliary motor as needed to achieve the purpose of providing auxiliary power.

[0043] Through the foregoing design and description, the power output torque sensing mechanism of the present application can convert the rotational torque into axial displacement by the design of the input shaft sleeve 21 of the input set 20, the rotating ring seat 51, and the torsion conversion ring seat 52 in the torsion connecting shaft set 50, and cooperate with the strain sensing component 56 on the fixed ring seat 55, so that the detected rotational torque value can be transmitted in a wired manner to avoid the distortion problem caused by noise interference in the existing wireless transmission. Moreover, the torque change of the rotating shaft can be detected in real time and accurately output through wired transmission, which can make the subsequent auxiliary power input more accurate and reliable, and can effectively simplify the structure, which is easy to manufacture and maintain, and can further reduce the overall cost.

[0044] The above description is only illustrative and not limiting, and those of ordinary skill in the art understand that many modifications, changes or equivalents can be made without departing from the spirit and scope of the claims, but all will fall within the protection scope of the present application.

Claims

1. A power output torque sensing mechanism, characterized by, Comprising: a shaft; an input set having a power-driven input sleeve, the input sleeve being pivotally arranged at one end of the shaft, and the end of the input sleeve protruding a plurality of equidistant convex shaft blocks, and the outer surface of each of the plurality of convex shaft blocks being formed with an axially extending axial ball groove; an output set having an output sleeve driven by the input set, the output sleeve being arranged at the other end of the shaft; and a torsion connecting shaft set arranged between the input sleeve and the output sleeve, the torsion connecting shaft set comprising at least a rotating ring seat, a torsion conversion ring seat and a fixed ring seat, wherein one end of the rotating ring seat is fixedly arranged on the output sleeve of the output set, the other end of the rotating ring seat protruding a plurality of equidistant inclined convex blocks which can extend into the torsion conversion ring seat, and the side surface of each of the inclined convex blocks being formed with an inclined tapered ball groove, and the inner edge of the torsion conversion ring seat being formed with a plurality of ball groove seats corresponding to the inclined convex blocks of the rotating ring seat, and each of the ball groove seats having an inclined tapered ball groove corresponding to the inclined tapered ball groove of the rotating ring seat for respectively clamping a plurality of tapered balls, and each of the ball groove seats having an axial ball groove corresponding to the axial ball groove of the input sleeve for respectively clamping a plurality of guide balls, and the fixed ring seat being fixedly arranged on the side of the torsion conversion ring seat opposite to the rotating ring seat, so that the torsion conversion ring seat can be axially moved to cause the fixed ring seat to be pressed, and at least one side surface of the fixed ring seat is provided with a strain sensing component which is connected to a control processing unit arranged outside in a wired manner.

2. The power output torque sensing mechanism of claim 1, wherein: The shaft is a power input shaft, and the input sleeve of the input set is arranged on the shaft by using a one-way bearing, and the output sleeve of the output set protrudes a shaft seat segment and an engagement tooth portion at the end opposite to the input set, wherein the shaft seat segment is provided with a bearing, and the engagement tooth portion can be sleeved with a tooth disc.

3. The power output torque sensing mechanism of claim 1 or 2, wherein: The shaft is formed with a ring flange on the side corresponding to the output set, and the top edge corners of the two sides of the ring flange are respectively formed with a ball groove, and the output sleeve of the output set is respectively provided with a ball seat on the two sides of the ring flange for clamping a plurality of guide balls, and the shaft is formed with a ring buckle groove on the side corresponding to the input set for buckling a buckle ring at the end of the input sleeve of the input set.

4. The power output torque sensing mechanism of claim 1, wherein: The convex shaft blocks of the input sleeve corresponding to the torsion connecting shaft set are formed at the end, and the side surface of the root of each of the plurality of convex shaft blocks is respectively formed with a clamping step, and each of the ball groove seats of the torsion conversion ring seat has a clamping step corresponding to the clamping step of the input sleeve.

5. The power output torque sensing mechanism of claim 1, wherein: The fixed ring seat of the torsion connecting shaft set is clamped with a first ring ball seat by using a plurality of claw blocks on the side corresponding to the torsion conversion ring seat, and the first ring ball seat is respectively formed with a ball groove at the position opposite to the torsion conversion ring seat for clamping a plurality of guide balls.

6. The power output torque sensing mechanism of claim 1 or 5, wherein: The fixed ring seat of the torsion connecting shaft set is provided with a second ring ball seat on the side corresponding to the input set, and the input sleeve of the aforementioned input set is provided with a corresponding third ring ball seat, and the second ring ball seat and the third ring ball seat are respectively formed with a ball groove at the position opposite to each other for clamping a plurality of guide balls.

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