Transmission structure capable of outputting torque value

Abstract

The utility model relates to the technical field of transmission structures, and provides a transmission structure capable of outputting a torque value. The driving shaft is rotationally arranged on the rack; one end of the torque sensor is connected with the driving shaft; the output shaft is connected with the other end of the torque sensor; the driving shaft is used for driving the torque sensor and the output shaft to rotate synchronously. According to the technical scheme, the problem that errors exist when the output torque value is measured in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to transmission structure technical field, specifically, relate to a transmission structure that can output torque value. BACKGROUND

[0002] In today's competitive industrial manufacturing field, whether it is pharmaceutical, food, chemical and other fine product processing industry, or mining, metallurgy, machinery manufacturing and other heavy industrial field, as a kind of key production equipment, the precise monitoring and control of the running state of the granulator plays a vital role in guaranteeing product quality, improving production efficiency and optimizing production process. And torque, as one of the core parameters to measure the performance of the transmission system of the granulator, can directly reflect the effectiveness, stability of power transmission inside the equipment and the stress condition of each component, and its accurate measurement has become an urgent need of modern industrial production.

[0003] However, the existing granulator in the current market has serious defects in torque measurement. Most of the granulators use current signal conversion-based method to indirectly obtain torque value. In principle, it is through monitoring the input current of the motor, and according to specific mathematical model and empirical formula, the torque value at the output shaft end is estimated by complex calculation and derivation. But in the actual operation process, due to the characteristics of the motor itself are not completely idealized, for example, the efficiency of the motor will fluctuate greatly with load change, running time, environmental temperature and other factors, which makes the current-torque conversion calculation based on fixed formula lose the precision foundation. CONTENT OF THE UTILITY MODEL

[0004] The utility model provides a transmission structure that can output torque value, solves the problem of error in measuring output torque value in related art.

[0005] The technical scheme of the utility model is as follows:

[0006] A transmission structure that can output torque value, comprising:

[0007] A rack;

[0008] A drive shaft, which is rotatably arranged relative to the rack;

[0009] A torque sensor, one end of which is connected with the drive shaft;

[0010] An output shaft, which is connected with the other end of the torque sensor;

[0011] The drive shaft is used to drive the torque sensor and the output shaft to rotate synchronously.

[0012] Optionally, the drive shaft, the torque sensor and the output shaft are coaxial.

[0013] Optionally, further comprising:

[0014] a first coupling, disposed between the driving shaft and the torque sensor, for connecting the driving shaft and the torque sensor;

[0015] a second coupling, disposed between the torque sensor and the output shaft, for connecting the torque sensor and the output shaft.

[0016] Optionally, the first coupling is a plum coupling.

[0017] Optionally, the second coupling is a flange coupling.

[0018] Optionally, the frame has a first mounting portion and a second mounting portion, the driving shaft is rotatably disposed on the first mounting portion, and the output shaft is rotatably disposed on the second mounting portion, further comprising:

[0019] a bearing seat, disposed on the second mounting portion, and the output shaft is rotatably disposed in the bearing seat.

[0020] Optionally, further comprising:

[0021] a centering device, disposed between the first coupling and the second coupling, for assisting the torque sensor to be coaxial with the driving shaft and the output shaft.

[0022] Optionally, the centering device comprises:

[0023] a mounting ring, disposed on the first coupling close to the torque sensor;

[0024] a plurality of centering rods, swingably disposed on the mounting ring, and one end of each of the centering rods has a protrusion;

[0025] a rotating ring, rotatably disposed on the mounting ring, and the rotating ring has a plurality of sliding grooves, and the protrusions are slidably disposed in the sliding grooves;

[0026] after the rotating ring is rotated, the other ends of the plurality of centering rods are synchronously close to or away from each other, and the other ends of the plurality of centering rods are synchronously in contact with or out of contact with the torque sensor.

[0027] Optionally, the centering device further comprises:

[0028] a contact wheel, rotatably disposed on the end of the centering rod away from the protrusion, and the contact wheel is used to contact the torque sensor.

[0029] Optionally, further comprising:

[0030] A fastener is arranged on the rotating ring for limiting the position of the rotating ring and the mounting ring.

[0031] The working principle and beneficial effects of the utility model are:

[0032] In the utility model, the torque sensor is directly connected in series between the driving shaft and the output shaft, can accurately perceive the torque change between the two in real time, realizes accurate acquisition of torque value, provides reliable basis for subsequent monitoring and regulation of power transmission system, effectively solves the problem of error in measurement of output torque value, and guarantees efficient and stable operation of the whole transmission process. BRIEF DESCRIPTION OF DRAWINGS

[0033] The above characteristics, technical features, advantages and implementation modes of the utility model will be further described in a clear and understandable manner in combination with the preferred embodiments and the accompanying drawings.

[0034] Fig. 1 It is a whole structure schematic view of the utility model;

[0035] Fig. 2 It is a structure schematic view of the positioning device when expanding;

[0036] Fig. 3 It is a structure schematic view of the positioning device when contracting.

[0037] In the drawing: 1, rack, 2, driving shaft, 3, torque sensor, 4, output shaft, 5, first coupling, 6, second coupling, 101, first mounting part, 102, second mounting part, 7, bearing seat, 8, centering device, 801, mounting ring, 802, centering rod, 8021, protrusion, 803, rotating ring, 8031, sliding groove, 9, abutting wheel, 10, fastener. DETAILED DESCRIPTION

[0038] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the specific implementation mode of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor, and other embodiments can also be obtained.

[0039] For the sake of simplicity and brevity of the drawings, only the parts related to the utility model are shown in the drawings, and they do not represent the actual structure of the product. In addition, in order to make the drawings simple and easy to understand, in some drawings, only one of the parts with the same structure or function is shown schematically, or only one of them is marked. In this text, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0040] In this text, it should be noted that, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connect" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0041] In addition, in the description of the present application, the terms "first", "second" and the like are only used for differentiation and description, and cannot be understood as indicating or implying relative importance.

[0042] Reference Figs. 1-3 For the first embodiment of the utility model, a transmission structure capable of outputting torque value is proposed, which comprises a rack 1; a driving shaft 2 is rotatably arranged relative to the rack 1; a torque sensor 3 is connected to one end of the driving shaft 2; an output shaft 4 is connected to the other end of the torque sensor 3; the driving shaft 2 is used to drive the torque sensor 3 and the output shaft 4 to rotate synchronously.

[0043] In this embodiment, in order to solve the problem of error in measuring output torque value in the related art, a transmission structure capable of outputting torque value is designed. The rack 1 is made of high-strength aluminum alloy material, which has good structural rigidity. The driving shaft 2 rotates flexibly and stably, and one end is connected to a power source (such as a motor). The torque sensor 3 is selected from high-precision strain gauge type torque sensor 3, which is transmission connected to the extended end of the driving shaft 2 to ensure stable connection. The output shaft 4 is also made of alloy steel material, which is transmission connected to the other end of the torque sensor 3, and the other end of the output shaft 4 can be connected to the working load (such as transmission gear set), so as to realize power transmission.

[0044] The advantage is that the torque sensor 3 is directly connected in series between the driving shaft 2 and the output shaft 4, which can accurately perceive the torque change between the two, realize accurate acquisition of torque value, provide reliable basis for subsequent monitoring and control of power transmission system, effectively solve the problem of error in measuring output torque value, and ensure efficient and stable operation of the whole transmission process.

[0045] Further, the driving shaft 2, the torque sensor 3 and the output shaft 4 are coaxial.

[0046] In this embodiment, when the drive shaft 2, the torque sensor 3 and the output shaft 4 are installed, calibration is performed by means of a high-precision laser coaxiality measuring instrument. First, the drive shaft 2 is fixed at the mounting position of the rack 1, and the mounting position of the left end of the torque sensor 3 is adjusted with the axis thereof as a reference, so that the axis deviation of the two is controlled within a very small range. Then, the output shaft 4 is connected with the right end of the torque sensor 3, and the axis deviation of the same with the torque sensor 3 is also ensured to be very small, so that the axes of the three are completely coincident. During the operation of the equipment, the coaxiality is reviewed by regular sampling inspection.

[0047] The advantage is that strict control of the coincidence of the axes of the three can minimize the adverse effects of additional bending moments, radial forces and the like caused by axis deviation. Avoiding the action of these additional forces on the torque sensor 3 can prevent distortion of the measured data, ensure that the measured value of the torque sensor 3 is the real and effective torque transmitted from the drive shaft 2 to the output shaft 4, further improve the torque measurement accuracy, improve the reliability and stability of the operation of the transmission structure, and make the control strategy based on torque feedback more accurate and effective.

[0048] Further, the first coupling 5 is arranged between the drive shaft 2 and the torque sensor 3, and is used to connect the drive shaft 2 and the torque sensor 3. The second coupling 6 is arranged between the torque sensor 3 and the output shaft 4, and is used to connect the torque sensor 3 and the output shaft 4.

[0049] Further, the first coupling 5 is a plum blossom coupling.

[0050] Further, the second coupling 6 is a flange coupling.

[0051] In this embodiment, the first coupling 5 is a plum blossom coupling. The driving end is connected with the drive shaft 2 in an interference fit, and a key is used to transmit torque, so as to ensure firm connection. The driven end is connected with the left end of the torque sensor 3 in a clearance fit, so as to facilitate installation and debugging, and the concentricity is ensured by fastening connection through the bolts on the coupling. The second coupling 6 is a flange coupling. The left end is positioned by a shoulder and connected with the right end of the torque sensor 3 through bolts, so as to ensure connection accuracy. The right end is connected with the output shaft 4 in a transition fit, and a key hole bolt is used to transmit torque, so as to prevent relative sliding and enhance connection reliability.

[0052] The star-shaped coupling allows certain radial and angular displacement compensation, effectively buffers the vibration transmitted by the drive shaft 2, protects the torque sensor 3 from impact, ensures normal torque transmission under certain installation errors, and guarantees the continuity of power transmission. The flange coupling has high rigidity and centering accuracy, is used to connect the torque sensor 3 and the output shaft 4, can accurately transmit torque, avoids torque loss and measurement error caused by loose connection or displacement, and optimizes the connection performance of the transmission chain, ensures stable and reliable operation of the entire transmission structure, and improves the accuracy of torque measurement and transmission.

[0053] Further, the rack 1 has a first mounting portion 101 and a second mounting portion 102, the drive shaft 2 is rotatably arranged on the first mounting portion 101, the output shaft 4 is rotatably arranged relative to the second mounting portion 102, and further comprising a bearing seat 7, the bearing seat 7 is arranged on the second mounting portion 102, and the output shaft 4 is rotatably arranged in the bearing seat 7.

[0054] In this embodiment, the first mounting portion 101 of the rack 1 is the bottom of the rack 1, the drive shaft 2 is arranged on the driving device, and the driving device is mounted on the first mounting portion 101. The second mounting portion 102 is located above the first mounting portion 101 and is designed in a stepped shape. The bearing seat 7 is made of cast iron and is fixed on the second mounting portion 102 by bolts. The bearing seat 7 is provided with a deep groove ball bearing, and the output shaft 4 is in interference fit with the inner ring of the deep groove ball bearing, so as to ensure that the output shaft 4 rotates flexibly and is accurately positioned radially in the bearing seat 7.

[0055] The advantages are that the reasonable installation design of the drive shaft 2 and the output shaft 4 at different positions of the rack 1 fully considers the main stress characteristics and rotation requirements of the two. The tapered roller bearing is used for the installation of the drive shaft 2, which can bear large radial and axial combined load to ensure stable power input of the drive shaft 2. The bearing seat 7 cooperates with the deep groove ball bearing to provide good support and radial constraint for the output shaft 4, ensuring smooth rotation of the output shaft 4. The two work together to optimize the mechanical properties of the transmission structure, reduce vibration and wear caused by improper shaft installation, indirectly improve the torque measurement accuracy, and ensure reliable operation of the equipment.

[0056] Further, the centering device 8 is arranged between the first coupling 5 and the second coupling 6, and is used to assist the torque sensor 3 to be coaxial with the drive shaft 2 and the output shaft 4.

[0057] Further, the centering device 8 comprises a mounting ring 801 arranged at the first coupling 5 close to the torque sensor 3, a plurality of centering rods 802 swingably arranged on the mounting ring 801, the centering rods 802 having protrusions 8021 at one end, and a rotating ring 803 rotatably arranged on the mounting ring 801, the rotating ring 803 having a plurality of sliding grooves 8031, the protrusions 8021 being slidably arranged in the sliding grooves 8031, and when the rotating ring 803 rotates, the other ends of the plurality of centering rods 802 synchronously approach or move away from each other, and the other ends of the plurality of centering rods 802 synchronously abut against or are separated from the torque sensor 3.

[0058] In the embodiment, the centering device 8 is arranged between the first coupling 5 and the second coupling 6, close to the torque sensor 3. The mounting ring 801 is made of stainless steel and is fixed to the outside of the first coupling 5 close to the torque sensor 3. The centering rods 802 are swingably connected to the mounting ring 801 by pins, forming a rotatable fulcrum, and one end of each centering rod 802 is provided with a protrusion 8021. The rotating ring 803 is rotatably arranged on the outside of the mounting ring 801 by two sets of deep groove ball bearings, and can freely rotate around the axis of the mounting ring 801. A plurality of sliding grooves 8031 are evenly arranged on the rotating ring 803 in the circumferential direction, and the protrusions 8021 of the centering rods 802 slide in the sliding grooves 8031. By rotating the rotating ring 803, the other ends of the centering rods 802 can be tightly abutted against or separated from the torque sensor 3.

[0059] The centering device 8 plays a key role in the transmission structure, and by cooperating with the rotating ring 803 and the centering rods 802, the centering device 8 can adjust the coaxiality of the torque sensor 3 and the front and rear shafts in real time during the installation and debugging of the equipment and during the operation. When the coaxiality deviates, the rotating ring 803 is rotated to make the centering rods 802 abut against the torque sensor 3, so as to correct the positional deviation, avoid the deterioration of the coaxiality caused by long-term operation and vibration, and ensure that the torque sensor 3 is always in an ideal working state, accurately measures the torque value, reduces the measurement error, and improves the stability and reliability of the transmission structure.

[0060] Further, the centering device 8 further comprises an abutting wheel 9 rotatably arranged at the end of the centering rod 802 away from the protrusion 8021, and the abutting wheel 9 is used to abut against the torque sensor 3.

[0061] In the embodiment, the abutting wheel 9 at the end of the centering rod 802 away from the protrusion 8021 is made of rubber, and is installed at the end of the centering rod 802 through a pin shaft, so that it can rotate freely around the pin shaft. When the centering rod 802 abuts against the torque sensor 3, the rubber abutting wheel 9 first contacts the surface of the torque sensor 3. Due to the softness and elasticity of the rubber, it can ensure close contact and will not scratch the shell of the torque sensor 3. In addition, during the vibration of the equipment, the rubber abutting wheel 9 can play a certain buffering and damping role, reducing the influence of the additional impact generated by abutting on the measurement accuracy of the torque sensor 3.

[0062] Further, the fastener 10 is arranged on the rotating ring 803, and is used to limit the position of the rotating ring 803 and the mounting ring 801.

[0063] In the embodiment, the fastener 10 is a stainless steel bolt, which is installed on the threaded hole outside the rotating ring 803. After the coaxiality of the torque sensor 3 is adjusted by the centering device 8, the butterfly bolt is tightened, so that the head is tightly pressed outside the mounting ring 801, limiting the relative position of the rotating ring 803 and the mounting ring 801, preventing the accidental rotation of the rotating ring 803 during the operation of the equipment, causing the position of the centering rod 802 to change, affecting the coaxiality of the torque sensor 3, and further ensuring the stability and accuracy of the torque measurement.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalent, without departing from the spirit and scope of the technical solutions of the present application. They should be covered in the scope of the claims of the present application.

Claims

1. A transmission structure capable of outputting torque values, characterized in that, include: Rack (1); A drive shaft (2) is rotatably disposed relative to the frame (1); A torque sensor (3) is provided, one end of which is connected to the drive shaft (2). Output shaft (4), the output shaft (4) is connected to the other end of the torque sensor (3); The drive shaft (2) is used to drive the torque sensor (3) and the output shaft (4) to rotate synchronously.

2. The transmission structure capable of outputting torque value according to claim 1, characterized in that, The drive shaft (2), the torque sensor (3), and the output shaft (4) are aligned.

3. The transmission structure capable of outputting torque value according to claim 1, characterized in that, Also includes: A first coupling (5) is disposed between the drive shaft (2) and the torque sensor (3) for connecting the drive shaft (2) and the torque sensor (3). The second coupling (6) is disposed between the torque sensor (3) and the output shaft (4) for connecting the torque sensor (3) and the output shaft (4).

4. The transmission structure capable of outputting torque value according to claim 3, characterized in that, The first coupling (5) is a plum blossom-shaped coupling.

5. The transmission structure capable of outputting torque value according to claim 3, characterized in that, The second coupling (6) is a flange coupling.

6. The transmission structure capable of outputting torque value according to claim 1, characterized in that, The frame (1) has a first mounting portion (101) and a second mounting portion (102), the drive shaft (2) is rotatably mounted on the first mounting portion (101), and the output shaft (4) is rotatably mounted relative to the second mounting portion (102), and further includes: The bearing housing (7) is disposed on the second mounting part (102), and the output shaft (4) is rotatably disposed in the bearing housing (7).

7. The transmission structure capable of outputting torque value according to claim 3, characterized in that, Also includes: A centering device (8) is disposed between the first coupling (5) and the second coupling (6) to make the torque sensor (3) coaxial with the drive shaft (2) and the output shaft (4).

8. The transmission structure capable of outputting torque value according to claim 7, characterized in that, The centering device (8) includes: Mounting ring (801) is disposed at the end of the first coupling (5) near the torque sensor (3); Centering rod (802), there are several centering rods (802), the centering rod (802) is swayed on the mounting ring (801), and one end of the centering rod (802) has a protrusion (8021). A rotating ring (803) is rotatably disposed on the mounting ring (801). The rotating ring (803) has a plurality of grooves (8031), and the protrusion (8021) is slidably disposed in the grooves (8031). After the rotating ring (803) rotates, the other ends of several centering rods (802) move closer to or further away from each other in sync, and the other ends of several centering rods (802) simultaneously abut against or release from the torque sensor (3).

9. A transmission structure capable of outputting torque value according to claim 8, characterized in that, The centering device (8) further includes: A contact wheel (9) is rotatably disposed at the end of the centering rod (802) away from the protrusion (8021), and the contact wheel (9) is used to contact the torque sensor (3).

10. A transmission structure capable of outputting torque value according to claim 9, characterized in that, Also includes: Fastener (10), which is disposed on the rotating ring (803) for limiting the position of the rotating ring (803) and the mounting ring (801).

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