CN111853075A - Transmission shaft torque sensor and mounting method - Google Patents
Transmission shaft torque sensor and mounting method Download PDFInfo
- Publication number
- CN111853075A CN111853075A CN202010691458.1A CN202010691458A CN111853075A CN 111853075 A CN111853075 A CN 111853075A CN 202010691458 A CN202010691458 A CN 202010691458A CN 111853075 A CN111853075 A CN 111853075A
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- CN
- China
- Prior art keywords
- shaft
- force measuring
- side surfaces
- transmission shaft
- needle roller
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
- F16D3/38—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another
- F16D3/40—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another with intermediate member provided with two pairs of outwardly-directed trunnions on intersecting axes
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a transmission shaft torque sensor and an installation method, belonging to the technical field of torque sensor manufacturing, wherein the sensor comprises a force measuring block and four main shafts which extend out of the side surface of the force measuring block in a cross shape and are used for being penetrated in respective needle roller bearings, and a data acquisition telemetry module is arranged in a core hole of the force measuring block; strain gauge sensors are arranged on the force measuring blocks between the adjacent main shafts; the installation method comprises the following steps: 1) respectively removing the cross shaft and the needle roller bearing in a universal joint fork bearing hole of a transmission shaft to be installed; 2) placing the sensor body at a corresponding position of the cross shaft, and aligning the axis of the main shaft with the center line of the bearing hole of the universal joint yoke; 3) sequentially loading a telescopic auxiliary shaft and a transition sleeve, and then pressing and loading a needle bearing; 4) and (5) loading the mixture into a snap spring to obtain the product. The invention can solve the problems that the installation of the existing transmission shaft torque sensor can damage the dynamic balance of the transmission shaft, is easy to loosen and throw out, has strict requirements on the installed transmission shaft and has large use limitation.
Description
Technical Field
The invention relates to the technical field of torque sensor manufacturing, in particular to a transmission shaft torque sensor and an installation method thereof.
Background
The transmission shaft torque sensor is a device for testing the torque force of a transmission shaft. A torque sensor of a transmission shaft comprises two shear type strain gauge sensors which are oppositely arranged on the outer surface of a transmission shaft part, wherein the transmission shaft is positioned between two universal joint forks and has no inner and outer diameter change; therefore, signal acquisition and external transmission are formed; in practical application, the transmission shaft torque sensor has the following problems: 1. The transmitting module and the power supply battery are fixed on the outer surface of the transmission shaft, so that the unbalanced additional mass on the surface of the transmission shaft is increased, the dynamic balance of the transmission shaft is seriously damaged, and the high-speed rotary vibration is serious; 2. the transmission shaft rotates at a high speed, so that the transmitting module and the power supply battery are easy to loosen and throw out, and equipment is damaged; 3. the transmission shaft in the patch area is strictly required to be a tubular structure with uniform inner and outer diameters and no abrupt change, or a solid cylinder with unchanged outer diameter, and the length of the area is not less than 30 mm. In fact, many transmission shafts are very compact in structure, and no available area exists, so that strain gauges cannot be pasted, the method cannot be used for measuring torque, and the use limitation is large.
Disclosure of Invention
The invention provides a transmission shaft torque sensor and an installation method thereof, which can solve the problems that the installation of the existing transmission shaft torque sensor can destroy the dynamic balance of a transmission shaft, is easy to loosen and throw out, has strict requirements on the installed transmission shaft and has large use limitation.
In order to solve the problems, the technical scheme adopted by the invention is as follows: the transmission shaft torque sensor comprises a sensor body, wherein the sensor body comprises a force measuring block and four main shafts which extend out of the side surface of the force measuring block in a cross shape and are used for penetrating and installing in respective needle roller bearings, a transition sleeve is arranged between the main shafts and the needle roller bearings, the extending end of each main shaft is provided with a groove which is opened outwards and used for accommodating a telescopic auxiliary shaft, the telescopic auxiliary shafts and the main shafts are coaxially arranged, and the transition sleeve is provided with top surfaces for positioning the telescopic auxiliary shafts; a data acquisition and telemetry module is arranged in a core hole of the force measuring block; strain gauge sensors are arranged on the force measuring blocks between the adjacent main shafts; the telescopic auxiliary shaft comprises a cylinder part and a positioning column part, the diameter of the positioning column part is larger than that of the cylinder part, the cylinder part is arranged in the groove, and the positioning column part is positioned in a space surrounded by the transition sleeve and the main shaft; the main shaft is arranged in a bearing hole of each universal joint fork through each needle roller bearing, and the outer ends of the needle roller bearings are provided with clamp springs;
The installation method comprises the following steps:
1) respectively removing the cross shaft and the needle roller bearing in a universal joint fork bearing hole of a transmission shaft to be installed;
2) placing the sensor body at a corresponding position of the cross shaft, and aligning the axis of the main shaft with the center line of the bearing hole of the universal joint fork;
3) sequentially loading the telescopic auxiliary shaft and the transition sleeve, and then pressing and loading the needle roller bearing;
4) and (5) loading the mixture into a snap spring to obtain the product.
In the above technical solution, a more specific technical solution may also be: the force measuring block is formed by surrounding a front surface, a back surface, two opposite transverse side surfaces, two vertical side surfaces and an inclined side surface connected between the transverse side surfaces and the vertical side surfaces, the front surface and the back surface are all octagonal surfaces, an included angle between the inclined side surface and the horizontal plane is 45 degrees, the four main shafts are respectively positioned at the centers of the transverse side surfaces and the vertical side surfaces, and 4 groups of strain gauge sensors are uniformly distributed on each inclined plane.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. because the data acquisition telemetry module is arranged in a core hole of the force measuring block, the strain gauge sensor is arranged between adjacent main shafts, and the main shafts are arranged in bearing holes of the universal joint yoke through needle bearings, the outer surface of the transmission shaft has no additional mass influencing the balance of the transmission shaft, the rotary vibration of the transmission shaft during high-speed rotation is greatly reduced, the dynamic balance of the transmission shaft is improved, and the centrifugal ratio born by electric parts is lower when the transmission shaft rotates at high speed; due to the protection of the universal joint fork, the sensor body can hardly be rubbed and bumped by foreign objects, is not easy to damage and has longer service life.
2. Because the main shaft is arranged in a cross shape, the telescopic auxiliary shafts are arranged in the main shaft, the transition sleeves are arranged outside the main shaft and the telescopic auxiliary shafts, and the cross shafts with almost all specifications can be replaced by temporarily processing the corresponding transition sleeves and the telescopic auxiliary shafts, the universal joint structure is suitable for any transmission shaft using the universal joint structure of the cross shafts, the universal joint structure can be installed without damaging the structure of the original transmission shaft, and the universal joint structure is convenient and quick to assemble and disassemble.
3. Because 4 groups of strain gauge sensors are uniformly distributed on the inclined side surface with an included angle of 45 degrees with the horizontal plane, the strain gauge sensors are actually detected to be the best position of a stress line, and the dynamic balance of the transmission shaft is further improved.
4. The size of the cross shaft is not more than that of the cross shaft on the original transmission shaft, the maximum weight of the cross shaft is not more than 2kg, and the cross shaft is convenient to carry and is particularly suitable for occasions for testing laboratories or whole vehicles. Meanwhile, a non-contact data acquisition mode of wireless remote measurement is adopted, so that the connection is convenient and simple.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a side view of fig. 1.
Fig. 3 is a cross-sectional view at fig. 2A-a.
Fig. 4 is a perspective view of the embodiment of the present invention.
FIG. 5 is a schematic view of the installation of a sensor body according to an embodiment of the invention.
Fig. 6 is an enlarged view at R of fig. 5.
Detailed Description
The invention will be further described in detail with reference to the following examples:
the transmission shaft torque sensor shown in fig. 1, 2, 3 and 4 comprises a sensor body, wherein the sensor body comprises a force measuring block 1 and four main shafts 2, the four main shafts 2 respectively extend out of the side surface of the force measuring block 1 in a cross shape and are used for being arranged in respective needle roller bearings 7 in a penetrating manner, the force measuring block is formed by surrounding a front surface 11, a back surface 15, two opposite transverse side surfaces 14, two opposite vertical side surfaces 12 and an inclined side surface 13 connected between the transverse side surfaces 12 and the vertical side surfaces 14, both the front surface 11 and the back surface 15 are octagonal surfaces, and an included angle between the inclined side surface 13 and the horizontal plane is 45 degrees; the four main axes are respectively positioned at the centers of the transverse side surface 14 and the vertical side surface 12; a transition sleeve 6 is arranged between each main shaft 2 and each needle roller bearing 7, a groove which is opened outwards and is used for accommodating each telescopic auxiliary shaft 5 is arranged at the extending end of each main shaft 2, the transition sleeve 6 is provided with a top surface of the positioning telescopic auxiliary shaft 5 which covers the groove, each telescopic auxiliary shaft 5 comprises a column part 51 and a positioning column part 52, the diameter size of the positioning column part 52 is larger than that of the column part 51, the column part 51 is arranged in the groove, and the positioning column part 52 is positioned in a space which is surrounded by the transition sleeve 6 and the main shaft 2; the force measuring block 1 is provided with a core hole, a data acquisition and telemetry module 3 is arranged in the core hole, and 4 groups of strain gauge sensors 4 are uniformly distributed on each inclined side surface 13; as shown in fig. 5 and 6, two opposite spindles 2 are mounted in the bearing holes of the universal joint yoke 8 of one transmission shaft section of the transmission shaft through the needle bearings 7, the other two opposite spindles 2 are mounted in the bearing holes of the universal joint yoke of the other transmission shaft section 9 of the transmission shaft through the needle bearings 7, each needle bearing 7 comprises a bearing inner ring 71 and a bearing outer ring 72, and a clamp spring 10 is arranged in the bearing hole of the corresponding universal joint yoke at the outer end of each needle bearing 7; a dustproof sleeve 102 is sleeved on the transition sleeve 6 between the needle bearing 7 and the transmission shaft section 9;
The installation method comprises the following steps:
1) firstly removing a clamp spring in a universal joint fork bearing hole of a transmission shaft to be installed by using a clamp spring clamp, and then knocking a cross shaft and a corresponding needle bearing on the transmission shaft to remove the cross shaft and the corresponding needle bearing;
2) the sensor body is placed at a corresponding position of an original cross shaft, so that the axis of a main shaft of a sensor to be installed is aligned with the center line of a corresponding universal joint fork bearing hole;
3) sequentially installing a telescopic auxiliary shaft and a transition sleeve, and then pressing the needle bearing hammer into place by using a rubber hammer;
4) and (5) checking that the needle roller bearings are all pressed in place, and then loading the needle roller bearings into the snap spring to obtain the needle roller bearing.
The invention not only greatly reduces the rotary vibration of the transmission shaft when the transmission shaft rotates at high speed, improves the dynamic balance of the transmission shaft, but also can not be rubbed and bumped by foreign objects, is not easy to damage, prolongs the service life, can replace cross shafts with almost all specifications, is suitable for any transmission shaft using a cross shaft universal joint structure, can be installed without damaging the structure of the original transmission shaft, and is convenient and quick to assemble and disassemble.
Claims (6)
1. A propeller shaft torque transducer, comprising: the sensor comprises a sensor body, wherein the sensor body comprises a force measuring block and four main shafts which extend out of the side surface of the force measuring block in a cross shape and are used for being penetrated in respective needle roller bearings, a transition sleeve is arranged between the main shafts and the needle roller bearings, the extending end of each main shaft is provided with a groove which is opened outwards and is used for accommodating a telescopic auxiliary shaft, the telescopic auxiliary shafts and the main shafts are coaxially arranged, and the transition sleeve is provided with a top surface for positioning the telescopic auxiliary shafts; a data acquisition and telemetry module is arranged in a core hole of the force measuring block; and strain gauge sensors are arranged on the force measuring blocks between the adjacent main shafts.
2. The propeller shaft torque sensor of claim 1, wherein: the telescopic auxiliary shaft comprises a cylinder part and a positioning column part, the diameter of the positioning column part is larger than that of the cylinder part, the cylinder part is arranged in the groove, and the positioning column part is positioned in a space surrounded by the transition sleeve and the main shaft.
3. The propeller shaft torque sensor according to claim 1 or 2, wherein: the main shaft is arranged in a bearing hole of each universal joint fork through each needle roller bearing, and the outer ends of the needle roller bearings are provided with clamp springs.
4. The propeller shaft torque sensor of claim 3, wherein: the force measuring block is provided with a front surface, a back surface, two transverse side surfaces, two vertical side surfaces and four oblique side surfaces which are respectively connected between the transverse side surfaces and the vertical side surfaces, the front surface and the back surface are all octagonal surfaces, an included angle between each oblique side surface and the horizontal plane is 45 degrees, the four main shafts are respectively positioned at the centers of the transverse side surfaces and the vertical side surfaces, and 4 groups of strain gauge sensors are uniformly distributed on each oblique plane.
5. A method for mounting a transmission shaft torque sensor is characterized in that: the transmission shaft torque sensor comprises a sensor body, wherein the sensor body comprises a force measuring block and four main shafts which extend out of the side surface of the force measuring block in a cross shape and are used for penetrating and installing in respective needle roller bearings, a transition sleeve is arranged between each main shaft and the corresponding needle roller bearing, a groove which is opened outwards and used for accommodating a telescopic auxiliary shaft is arranged at the extending end of each main shaft, the telescopic auxiliary shafts and the main shafts are coaxially arranged, and the transition sleeves are used for positioning the top surfaces of the telescopic auxiliary shafts; a data acquisition and telemetry module is arranged in a core hole of the force measuring block; strain gauge sensors are arranged on the force measuring blocks between the adjacent main shafts; the telescopic auxiliary shaft comprises a cylinder part and a positioning column part, the diameter of the positioning column part is larger than that of the cylinder part, the cylinder part is arranged in the groove, and the positioning column part is positioned in a space surrounded by the transition sleeve and the main shaft; the main shaft is arranged in a bearing hole of each universal joint fork through each needle roller bearing, and the outer ends of the needle roller bearings are provided with clamp springs;
The installation method comprises the following steps:
1) respectively removing the cross shaft and the needle roller bearing in a universal joint fork bearing hole of a transmission shaft to be installed;
2) placing the sensor body at a corresponding position of the cross shaft, and aligning the axis of the main shaft with the center line of the bearing hole of the universal joint fork;
3) sequentially loading the telescopic auxiliary shaft and the transition sleeve, and then pressing and loading the needle roller bearing;
4) and (5) loading the mixture into a snap spring to obtain the product.
6. The method of mounting a propeller shaft torque sensor according to claim 5, wherein: the force measuring block is provided with a front surface, a back surface, two transverse side surfaces, two vertical side surfaces and four oblique side surfaces connected between the transverse side surfaces and the vertical side surfaces, the front surface and the back surface are all octagonal surfaces, an included angle between each oblique side surface and the horizontal plane is 45 degrees, the four main shafts are respectively positioned at the centers of the transverse side surfaces and the vertical side surfaces, and 4 groups of strain gauge sensors are uniformly distributed on each oblique plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010691458.1A CN111853075B (en) | 2020-07-17 | 2020-07-17 | Transmission shaft torque sensor and mounting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010691458.1A CN111853075B (en) | 2020-07-17 | 2020-07-17 | Transmission shaft torque sensor and mounting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111853075A true CN111853075A (en) | 2020-10-30 |
| CN111853075B CN111853075B (en) | 2023-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010691458.1A Active CN111853075B (en) | 2020-07-17 | 2020-07-17 | Transmission shaft torque sensor and mounting method |
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| CN (1) | CN111853075B (en) |
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2020
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| CN111853075B (en) | 2023-01-06 |
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