CN113125166B - Mounting structure and mounting method of chassis dynamometer rotating hub tension-compression sensor - Google Patents
Mounting structure and mounting method of chassis dynamometer rotating hub tension-compression sensor Download PDFInfo
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- CN113125166B CN113125166B CN202110196996.8A CN202110196996A CN113125166B CN 113125166 B CN113125166 B CN 113125166B CN 202110196996 A CN202110196996 A CN 202110196996A CN 113125166 B CN113125166 B CN 113125166B
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- 238000003825 pressing Methods 0.000 claims abstract description 16
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/26—Auxiliary measures taken, or devices used, in connection with the measurement of force, e.g. for preventing influence of transverse components of force, for preventing overload
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
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Abstract
The utility model discloses a chassis dynamometer hub pulling and pressing sensor mounting structure and a mounting method thereof, wherein the chassis dynamometer hub pulling and pressing sensor mounting structure comprises a support frame, a transmission shaft and a hub; the driving assembly is sleeved on the driving shaft, a shell of the driving assembly is connected with the driving shaft through a first driving bearing, and a bearing assembly is connected between the shell and the supporting frame; a plurality of mounting plates are axially arranged on the outer circumference of the shell, and a pull seat is arranged on at least one mounting plate; the pull seat is movably connected with a pull rod assembly, the other end of the pull rod assembly is connected with a pull pressure sensor, the pull pressure sensor is arranged on a mounting frame, and the mounting frame is fixedly arranged on the supporting frame; the central axis of the tension and compression sensor is perpendicular to the central axis of the transmission shaft; the mounting structure is simple and compact, easy to manufacture and mount, and can effectively acquire the stress condition of the transmission shaft.
Description
Technical Field
The utility model relates to the technical field of dynamometers, in particular to a mounting structure and a mounting method of a chassis dynamometer rotating hub tension-compression sensor.
Background
The chassis dynamometer is indoor bench test equipment for testing the performances of the automobile and the engineering vehicle, such as dynamic performance, multi-station emission index, fuel oil index, pure electric endurance mileage and the like, the chassis dynamometer simulates a road surface through a roller, calculates a road simulation equation, and simulates by a loading device to realize accurate simulation of various working conditions of the automobile and the engineering vehicle, and can be used for loading and debugging of the automobile and the engineering vehicle and diagnosing faults of the vehicle under the loading condition; the chassis dynamometer is convenient to use, reliable in performance and free from the influence of external conditions. On the premise of not disassembling the automobile, the service performance of each system and each component of the automobile can be accurately and rapidly detected. The chassis dynamometer can be used for automobile science experiments and also can be used for maintenance and detection.
As disclosed in chinese patent (publication No. CN 208568127U) in 2019, a chassis dynamometer driven by a permanent magnet synchronous motor includes a base, a spindle, an encoder, a torque measurer, and a hub, where the spindle is fixedly mounted on the base through a bearing; the hub is fixed on the main shaft, the main shaft is provided with resistance by a permanent magnet synchronous motor, and the permanent magnet synchronous motor comprises a rotating shaft, a shell, a stator assembly and a rotor assembly; the stator assembly is fixedly arranged on the shell and provides a rotating resistance magnetic field for the rotor assembly; the rotor component with permanent magnetic property is fixedly arranged on the rotating shaft and corresponds to the stator component; the torque measurer is arranged between the main shaft and the rotating shaft and is used for measuring the rotating torque between the shafts; the encoder is used for measuring the rotating speed and the rotating angle of the rotating shaft. The dynamometer can be used for a dynamometer test of a vehicle under multiple environments, but has larger axial size and more occupied axial space, and particularly, in order to acquire the torque of a transmission shaft, a torque measurer is arranged between two shafts, so that the axial size is greatly increased, and the dynamometer test of multiple wheels of a large truck can occupy a very large underground space.
Disclosure of Invention
The utility model aims to solve the problems in the prior art and provides a mounting structure and a mounting method of a chassis dynamometer rotating hub tension-compression sensor.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the mounting structure of the rotating hub tension-compression sensor of the chassis dynamometer comprises a support frame, wherein a transmission shaft is arranged on the support frame, and one end of the transmission shaft extends out of the support frame and is connected with a rotating hub; the driving assembly is sleeved on the transmission shaft at the position above the support frame, a shell of the driving assembly is connected with the transmission shaft through a first transmission bearing, and a bearing assembly is connected between the shell and the support frame; a plurality of mounting plates are axially arranged on the outer circumference of the shell, and a pull seat is arranged on at least one mounting plate; the pull seat is movably connected with a pull rod assembly, the other end of the pull rod assembly is connected with a pull pressure sensor, the pull pressure sensor is arranged on a mounting frame, and the mounting frame is fixedly arranged on the supporting frame; the central axis of the tension and compression sensor is perpendicular to the central axis of the transmission shaft.
The mounting structure of the tension and compression sensor is ingenious in arrangement, the mounting position relation between the supporting frame and the driving assembly is reasonably utilized, the tension and compression sensor is compactly arranged near the driving assembly, space occupation is reduced, a complex connecting structure is not required to be arranged, the length of the driving shaft is not required to be additionally lengthened to be connected with the tension and compression sensor, interference to the movement of the driving shaft is avoided, and the related operation of a dynamometer test can be completed in the normal operation process of the driving shaft and the driving assembly.
Usually, the arrangement of a rotating hub, a transmission shaft, a motor and the like of the chassis dynamometer occupies a larger space, but the chassis dynamometer in the application adopts a compact design, so that the axial size and the circumferential size are reduced as much as possible; the tension and compression sensor mounting structure is well adapted to the compact design.
In addition, the pull-press sensor is not directly connected with and acts on the transmission shaft, but is connected with the shell through the pull rod assembly and the pull seat so as to indirectly acquire the pull-press acting force of the transmission shaft, and data such as power, torque and the like are obtained through conversion; the transmission shaft and the driving assembly are connected together, the transmission shaft and the driving assembly are not in direct contact with the supporting frame (and the mounting seat), the transmission shaft and the driving assembly are connected with the supporting frame through the bearing assembly, the driving assembly and the transmission shaft can rotate freely, but due to the arrangement of the pull seat, the pull rod assembly, the pull pressure sensor and the mounting frame, when the transmission shaft rotates, the pull seat and the pull rod assembly can pull and fix the shell, so that the torque of the shell is obtained by overcoming the rotation of the transmission shaft from the shell, and the torque of the transmission shaft is obtained by conversion of the relation between acting force and reaction force. That is, the driving assembly is sleeved on the transmission shaft, and the whole transmission shaft and the rotating hub are installed through the bearing assembly arranged on the driving assembly.
Further, the pull seat comprises a first vertical connecting plate which is in threaded connection with the mounting plate, a pair of second vertical connecting plates which are arranged in parallel are arranged on one surface of the first vertical connecting plate, which is far away from the mounting plate, the pair of second vertical connecting plates are perpendicular to the first vertical connecting plate and form a vertical opening, and the pair of second vertical connecting plates are connected with the pull rod assembly through a pin shaft; the pin shafts horizontally penetrate through a pair of second vertical connecting plates, pin shaft end covers are respectively arranged at the end parts of the pin shafts, and locking bolts are screwed outside the pin shaft end covers.
The pull seat with the structure is simple in structure and easy to manufacture, can be horizontally arranged on the outer circumference of the shell, and transmits the pulling pressure born by the shell to the vertically arranged pull rod assembly; the pull seat can reduce the loss and distortion of stress while ensuring the connection stability so as to ensure the accuracy of measurement; the purpose of the pull seat is to transmit horizontal (radial) force to the pull pressure sensor arranged vertically; the vertical opening is convenient for the installation of the pull rod assembly, and the pin shaft, the pin shaft end cover and the locking bolt are arranged, so that the assembly and the disassembly are convenient, and a stable fastening structure can be formed. The maximum dimension of the first vertical connection plate may not exceed 360mm.
Further, a reinforcing plate is connected to the end part of the pull rod assembly, which is staggered between the pair of second vertical connecting plates, and the reinforcing plate is also connected with the first vertical connecting plates; and an inclined rib plate is arranged between the outer side of at least one second vertical connecting plate and the first vertical connecting plate. The reinforcing plate with the setting of diagonal rib plate can strengthen joint strength, promotes stability.
Further, the pull rod assembly comprises a pull rod nut, one end of the pull rod nut is provided with a first horizontal through hole, and the first horizontal through hole is used for being connected with the pull seat; the other end of the pull rod nut is provided with a vertical screw hole, the vertical screw hole is connected with a double-head screw rod, and the other end of the double-head screw rod is connected with the pull pressure sensor; and locking nuts are respectively sleeved at two ends of the double-headed screw, and a spring washer and a flat washer are sequentially arranged between the locking nuts and the pull rod nuts or between the locking nuts and the pull pressure sensor.
The pull rod nut plays a role in bearing transition, the stress of the pull seat is transmitted to the double-end screw rod, the pull rod nut can move relative to the pull seat when being not fastened, and when the positions of the pull seat and the shell are adjusted, namely the pull seat is positioned at the 180-degree horizontal angle of the shell, the pull rod nut can not move relative to the pull seat basically after the pull rod nut is fastened; the pull rod nut adopts a steel structural member made of 40Cr materials, so that the pull rod nut can have better stress performance, and the whole length of the pull rod assembly can be within 500mm (relative to a rotating hub with a diameter of several meters, the length of the pull rod assembly exceeds a ten-meter dynamometer platform).
The setting of double-end screw rod can be simultaneously vertical spiro union connect pull rod nut with draw pressure sensor, lock nut plays the fastening effect, the spring washer with the setting of flat washer is convenient for finely tune to keep the symmetry at both ends.
Further, the pull rod nut is in a strip shape, and the end part of the pull rod nut with the first horizontal through hole is in a semicircular structure, so that the pull rod nut can conveniently move at the vertical opening in the pull seat; the axis of the first horizontal through hole is parallel to the axis of the semicircular structure and is respectively and vertically arranged with the axis of the vertical screw hole, and the vertical screw hole is arranged at the center position, so that the stress is more balanced; the middle size of the double-end screw is larger than the sizes of the two ends, a plurality of rectangular planes are arranged on the outer circumference of the middle, the double-end screw is convenient to clamp by using a tool for installation, and the central axis of the tension and compression sensor and the central axis of the double-end screw are coaxially arranged.
Further, the mounting frame is arranged on the side face of the supporting frame and comprises a horizontal mounting plate and a pair of inclined supporting plates arranged below the horizontal mounting plate, and the horizontal mounting plate and the inclined supporting plates are welded on the side walls of the supporting frame. After the tension and compression sensor is fixed, the tension and compression sensor can acquire the stress of the whole casing and the driving assembly thereof.
Further, the support frame is of a plate frame structure and comprises a substrate, a pair of parallel side plates are arranged on two sides of the substrate, the side plates are multi-stage ladder-shaped trapezoidal plates, the mounting frame is arranged on the outer sides of the side plates, the upper size of each side plate is smaller than the lower size of each side plate, by adopting the side plates with the shape, the supporting area below can be increased, the occupied space above can be reduced, the parts above can be connected more compactly, the center of each side plate falls in the plane of the center line of the substrate, and the stability is better; a plurality of arc backup pad is equipped with between a pair of the curb plate, be provided with the mount pad in the arc backup pad, the mount pad is semicircle groove form structure, the axial both ends of mount pad are respectively through bearing assembly connection installation drive assembly's casing, the outer circumference of mount pad is close to the both sides of curb plate all set up to planar structure and closely butt the inboard setting of curb plate. The outer circumference of the mounting seat is provided with a groove near the step of the side plate, and the ground can be free to connect and mount the pull seat
The arc-shaped supporting plates on the outer side are just flush with the outer end face of the mounting seat, the arc-shaped supporting plates on the inner side support the middle part of the mounting seat to be just close to the end part of the rotating hub, and the rotation of the rotating hub can be formed and not influenced; and the inner side and the outer side are provided with the inclined rib plates to improve the connection strength.
Further, the driving component is a permanent magnet synchronous motor, the permanent magnet synchronous motor comprises a rotor component and a stator component, the rotor component is sleeved and fixed on the transmission shaft, and the stator component is arranged and installed in the shell; the shell comprises an annular shell and shell end covers which are in threaded connection with two ends of the annular shell, an axial flange structure is arranged in the middle of the shell end covers, the flange structure is provided with a stepped inner hole and a stepped outer peripheral surface, the flange structure is sleeved and abutted to the transmission shaft, the first transmission bearing is arranged between the stepped inner hole and the transmission shaft, and the bearing assembly is sleeved on the stepped outer peripheral surface; the outer circumference of the annular shell is provided with a circle of annular grooves, and the annular grooves are internally clamped and screwed with the mounting plate at intervals of 90 degrees.
The permanent magnet synchronous motor is adopted for driving, so that a high-torque output environment can be provided, the response speed is high, the rotating speed is easy to control, the structure is compact, and the permanent magnet synchronous motor can be directly arranged on the transmission shaft to drive the transmission shaft to rotate, so that the rotating hub is driven to rotate; that is, the rotor assembly is mounted on the drive shaft, and the stator assembly is mounted on the housing, and the housing overcomes the rotating force and the rotating force of the drive shaft to be basically the same through the relation between the acting force and the reacting force, so that the tension and compression sensor is fixed and connected with the housing to indirectly acquire the stress or torque of the drive shaft.
Further, the bearing assembly comprises a main bearing sleeved on the shell, the main bearing is mounted on a mounting seat on the support frame, bearing end covers are respectively arranged on the inner side and the outer side of the main bearing, a bearing pressing plate is further connected between the bearing end covers in a threaded manner, and the bearing pressing plate is arched, and two ends of the bearing pressing plate are respectively connected with the mounting seat in a threaded manner; the bearing assemblies are arranged in a pair. The arrangement of the bearing pressing plate can fix the bearing end cover and the main bearing on the mounting seat, reduces the axial and circumferential shaking of the bearing end cover and the main bearing, and is convenient to mount and dismount.
Further, the installation method of the chassis dynamometer hub tension-compression sensor installation structure comprises the steps that a driving assembly is installed on a transmission shaft connected with a hub, the transmission shaft and the driving assembly are installed on an installation seat through a bearing assembly, and the installation seat is arranged on a supporting frame; the outer side wall of the support frame is provided with a pull-press sensor through a mounting frame, the central axis of the pull-press sensor is perpendicular to the central axis of the transmission shaft, a pull rod assembly is vertically connected to the pull-press sensor, and the pull rod assembly is connected with and fixes the casing of the driving assembly through a pull seat.
Compared with the prior art, the utility model has the beneficial effects that: 1. the tension and compression sensor mounting structure is ingenious in arrangement, reasonable and compact in structure, space occupation is reduced, a complex connecting structure is not required to be arranged, the length of the transmission shaft is not required to be additionally lengthened, movement interference is small, and the test is simple and high in accuracy; 2. the pulling and pressing sensor is not directly connected with and acts on the transmission shaft, but is connected with the shell through the pull rod assembly and the pull seat to indirectly obtain the pulling and pressing acting force of the transmission shaft, and data such as power, torque and the like are obtained through conversion, so that the aim of simplifying the whole structure is fulfilled; 3. the pull seat with the structure is simple in structure and easy to manufacture, can be horizontally arranged on the outer circumference of the shell, and transmits the pulling pressure born by the shell to the vertically arranged pull rod assembly, the double-head screw rod can be vertically connected with the pull rod nut and the pulling pressure sensor in a threaded manner at the same time, and the pull rod nut plays a role in bearing transition and transmits the stress of the pull seat to the double-head screw rod; 4. the permanent magnet synchronous motor is adopted for driving, so that a high-torque output environment can be provided, the response speed is high, the rotating speed is easy to control, the structure is compact, the rotor assembly is arranged on the transmission shaft, the stator assembly is arranged on the shell, and the tension and compression sensor is fixed and connected with the shell to indirectly obtain the stress or torque of the transmission shaft through the relation between acting force and reacting force.
Drawings
FIG. 1 is an overall schematic diagram of a chassis dynamometer hub pull pressure sensor mounting structure of the present utility model;
FIG. 2 is a perspective view of a pull seat and pull rod assembly of a chassis dynamometer hub pull pressure sensor mounting structure of the present utility model;
FIG. 3 is a schematic view of a pull seat and pull rod assembly of a chassis dynamometer hub pull pressure sensor mounting structure of the present utility model;
FIG. 4 is a schematic diagram of a pull rod nut of a chassis dynamometer hub pull pressure sensor mounting structure according to the present utility model;
FIG. 5 is a schematic view in partial cross section of a chassis dynamometer hub pull pressure sensor mounting structure of the present utility model;
FIG. 6 is a schematic diagram of a semi-sectional perspective view of a chassis dynamometer hub tension and compression sensor mounting structure according to the present utility model;
FIG. 7 is a schematic diagram of a chassis end cover of a chassis dynamometer hub pull pressure sensor mounting structure;
FIG. 8 is a schematic diagram II of a chassis end cover of a chassis dynamometer hub pull pressure sensor mounting structure according to the present utility model;
FIG. 9 is a schematic diagram of the overall installation of the chassis dynamometer of the present utility model;
in the figure: 1. a support frame; 101. a substrate; 102. a side plate; 103. an arc-shaped supporting plate; 2. a transmission shaft; 3. a rotating hub; 4. a housing; 401. an annular housing; 402. a housing end cap; 403. a mounting plate; 5. a bearing assembly; 501. a main bearing; 502. a bearing end cap; 503. a bearing pressing plate; 6. a pull seat; 601. a first vertical connection plate; 602. a second vertical connection plate; 603. a pin shaft; 604. a pin end cover; 605. a locking bolt; 606. a reinforcing plate; 607. diagonal rib plates; 7. a pull rod assembly; 701. a pull rod nut; 7011. a first horizontal through hole; 7012. vertical screw holes; 702. a double-ended screw; 703. a lock nut; 704. a spring washer; 705. a flat gasket; 706. a rectangular plane; 8. a pull-press sensor; 9. a mounting frame; 10. a mounting base; 11. a first drive bearing; 12. a flange structure; 1201. a stepped inner bore; 1202. the step outer peripheral surface.
Detailed Description
The following description of the embodiments of the present utility model will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on embodiments of the present utility model, are within the scope of the present utility model.
Embodiment one:
as shown in fig. 1, the mounting structure of the rotary hub tension and compression sensor of the chassis dynamometer comprises a support frame 1, wherein a transmission shaft 2 is arranged on the support frame 1, and one end of the transmission shaft 2 extends out of the support frame 1 and is connected with a rotary hub 3; the transmission shaft 2 is sleeved with a driving assembly at the position above the support frame 1, a shell 4 of the driving assembly is connected with the transmission shaft 2 through a first transmission bearing, and a bearing assembly 5 is connected between the shell 4 and the support frame 1; a plurality of mounting plates 403 are axially arranged on the outer circumference of the shell 4, and a pull seat 6 is arranged on one mounting plate 403; the pull seat 6 is movably connected with a pull rod assembly 7, the other end of the pull rod assembly 7 is connected with a pull pressure sensor 8, the pull pressure sensor 8 is arranged on a mounting frame 9, and the mounting frame 9 is fixedly arranged on the support frame 1; the central axis of the tension and compression sensor 8 is perpendicular to the central axis of the transmission shaft 2.
This draw pressure sensor mounting structure sets up ingenious, the rational utilization support frame 1 the transmission shaft 2 with the mounting position relation between the drive assembly, the compact will draw pressure sensor 8 to set up near drive assembly has reduced space occupation, need not set up complicated connection structure, also need not additionally lengthen the length of transmission shaft is in order to connect draw pressure sensor, can not be right the motion of transmission shaft produces the interference the transmission shaft with the in-process of drive assembly normal operating, all can accomplish the relevant operation of dynamometry test.
The pull-press sensor 8 is not directly connected with and acts on the transmission shaft 2, but is connected with the shell 4 through the pull rod assembly 7 and the pull seat 6 to indirectly acquire the pull-press acting force of the transmission shaft 2, the diameter of the shell 4 is obtained through conversion to obtain data such as power, torque and the like, and the horizontal distance between the pull seat 6 and the transmission shaft 2 and the length of the pull rod assembly are all determined; the transmission shaft 2 and the driving component are connected together, the transmission shaft 2 and the driving component are not in direct contact with the supporting frame 1 (and the mounting seat 10), the transmission shaft 2 and the driving component are connected with the supporting frame 1 (and the mounting seat 10) through the bearing component 5, the driving component and the transmission shaft 2 can freely rotate, but due to the arrangement of the pull seat 6, the pull rod component 7, the pull pressure sensor 8 and the mounting frame 9, when the transmission shaft 2 rotates, the pull seat 6 and the pull rod component 7 can pull and fix the shell 4, so that the torque of the shell 4 is obtained by overcoming the rotation of the transmission shaft 2 from the shell 4, and the torque of the transmission shaft 2 is obtained by conversion of the relation of acting force and reacting force. That is to say, the driving assembly is sleeved on the transmission shaft 2, and the whole transmission shaft and the rotating hub are installed through the bearing assembly arranged on the driving assembly.
Further, as shown in fig. 2 and 3, the pull seat 6 includes a first vertical connection plate 601, the first vertical connection plate 601 is screwed on the mounting plate 403, a pair of second vertical connection plates 602 disposed in parallel are disposed on a surface of the first vertical connection plate 601 away from the mounting plate 403, the pair of second vertical connection plates 602 are disposed perpendicular to the first vertical connection plate 601 and form a vertical opening, and the pair of second vertical connection plates 602 are connected with the pull rod assembly 7 through a pin shaft 603; the pin shafts 603 horizontally penetrate through a pair of the second vertical connecting plates 602 and are respectively provided with pin shaft end covers 604 at the end parts, and the pin shaft end covers 604 are externally screwed with locking bolts 605.
The pull seat with the structure has simple structure and easy manufacture, can be horizontally arranged on the outer circumference of the shell 4, and transmits the pulling pressure born by the shell 4 to the vertically arranged pull rod assembly 7; the pull seat 6 can reduce the stress loss and distortion while ensuring the connection stability so as to ensure the measurement accuracy; the purpose of the pull seat 6 is to transmit horizontal (radial) force to the pull pressure sensor 8 arranged vertically; the vertical opening is convenient for the installation of the pull rod assembly 7, and the pin shaft 603, the pin shaft end cover 604 and the locking bolt 605 are arranged, so that the assembly and disassembly are convenient, and a stable fastening structure can be formed. The maximum length dimension of the first vertical connection plate 601 is 360mm.
Further, a reinforcing plate 606 is connected to the end of the pull rod assembly 7 staggered between the pair of second vertical connecting plates 602, and the reinforcing plate 606 is also connected to the first vertical connecting plates 601; an inclined rib 607 is disposed between the outer side of at least one of the second vertical connection plates 602 and the first vertical connection plate 601. The reinforcing plate 606 and the diagonal rib plate 607 can enhance the connection strength and improve the stability.
Further, as shown in fig. 4, the pull rod assembly 7 includes a pull rod nut 701, one end of the pull rod nut 701 is provided with a first horizontal through hole 7011, and the first horizontal through hole 7011 is used for being connected with the pin 603; the other end of the pull rod nut 701 is provided with a vertical screw hole 7012, the vertical screw hole 7012 is connected with a double-headed screw 702, and the other end of the double-headed screw 702 is connected with the pull pressure sensor 8; lock nuts 703 are respectively sleeved at two ends of the double-headed screw 702, and spring washers 704 and flat washers 705 are sequentially arranged between the lock nuts 703 and the pull rod nuts 701 and between the pull pressure sensors 8.
The pull rod nut 701 plays a role of bearing transition, the stress of the pull seat 6 is transmitted to the double-headed screw 702, the pull rod nut 701 can move relative to the pull seat 6 when not fastened, and when the positions of the pull seat 6 and the machine shell 4 are adjusted, namely the pull seat 6 is positioned at the 180-degree horizontal angle of the machine shell 4, the pull rod nut 701 can not move relative to the pull seat 6 basically after the pull rod nut 701 is fastened; the pull rod nut 701 adopts a steel structural member made of 40Cr material, so that the pull rod nut can have better stress performance, and the whole length of the pull rod assembly 7 can be within 500mm (relative to a rotating hub with a diameter of several meters, the length exceeds a dynamometer platform with ten meters).
The double-end screw 702 is arranged to be capable of being connected with the pull rod nut 701 and the pull pressure sensor 8 in a vertical screwed mode, the lock nut 703 plays a fastening role, and the spring washer 704 and the flat washer 705 are arranged to be convenient to finely adjust so as to keep symmetry of two ends.
Further, the pull rod nut 701 is in a strip shape, and the end portion of the pull rod nut 701 having the first horizontal through hole 7011 is in a semicircular structure, so as to be convenient for moving at the vertical opening in the pull seat 6; the axis of the first horizontal through hole 7011 is overlapped with the axis of the semicircular structure and is respectively perpendicular to the axis of the vertical screw hole 7012, and the vertical screw hole 7012 is arranged at the center position, so that the stress is more balanced; the middle size of the double-end screw 702 is larger than the sizes of the two ends, and a plurality of rectangular planes 706 are arranged on the outer circumference of the middle, so that the double-end screw 702 is convenient to clamp by a tool for twisting adjustment, and the central axis of the tension and compression sensor 8 and the central axis of the double-end screw 702 are coaxially arranged.
Further, the mounting frame 9 is arranged on the side face of the supporting frame 1, the mounting frame 9 comprises a horizontal mounting plate and a pair of inclined supporting plates arranged below the horizontal mounting plate, and the horizontal mounting plate and the inclined supporting plates are welded on the side wall of the supporting frame 1. After the tension and compression sensor 8 is fixed, the tension and compression sensor 8 can acquire the stress of the whole casing and the driving assembly thereof.
Further, as shown in fig. 6 and 7, the supporting frame 1 is a plate frame structure, and includes a base plate 101, two sides of the base plate 101 are provided with a pair of parallel side plates 102, the side plates 102 are multi-stage ladder-shaped plates, wherein the mounting frame 9 is mounted on the outer side of one side plate 102, the upper dimension of the side plate 102 is smaller than the lower dimension of the side plate 102, and by adopting the side plate with such a shape, the supporting area below can be increased, the space occupation above can be reduced, the connection of the components above can be more compact, the center of the components falls in the plane of the center line of the base plate 101, and the stability is better; a plurality of arc backup pad 103 are equipped with between a pair of curb plate 102, be provided with mount pad 10 on the arc backup pad 103, mount pad 10 is semicircle slot-shaped structure, the axial both ends of mount pad 10 pass through respectively the bearing assembly 5 connection installation drive assembly's casing 4, the outer circumference of mount pad 10 is close to both sides of curb plate 102 all set up to planar structure and closely the butt the inboard setting of curb plate 102. The outer circumference of the mounting base 10 is provided with a groove near the step of the side plate 102, and the step can be free to connect and mount the pull base
The outer arc-shaped supporting plate 103 is just flush with the outer end surface of the mounting seat 10, and the inner arc-shaped supporting plate 103 supports the middle part of the mounting seat 10 to be just close to the end part of the rotating hub 3, so that the support can be formed and the rotation of the rotating hub 3 is not influenced; and the inner side and the outer side are provided with the inclined rib plates to improve the connection strength.
Further, as shown in fig. 7 and 8, the driving component is a permanent magnet synchronous motor, the permanent magnet synchronous motor includes a rotor component and a stator component, the rotor component is sleeved and fixed on the transmission shaft 2, and the stator component is arranged and installed in the casing 4; the casing 4 comprises an annular casing 401 and casing end covers 402 which are in threaded connection with two ends of the annular casing 401, an axial flange structure 12 is arranged in the middle of the casing end covers 402, the flange structure 12 is provided with a stepped inner hole 1201 and a stepped outer circumferential surface 1202, the flange structure 12 is sleeved and abutted to the transmission shaft 2, the first transmission bearing 11 is arranged between the stepped inner hole 1201 and the transmission shaft 2, and the bearing assembly 5 is sleeved on the stepped outer circumferential surface 1202; a circle of annular grooves are formed in the outer circumference of the annular shell 401, and the annular grooves are internally clamped and screwed with the mounting plate 403 at intervals of 90 degrees.
The permanent magnet synchronous motor is adopted for driving, so that a high-torque output environment can be provided, the response speed is high, the rotating speed is easy to control, the structure is compact, and the permanent magnet synchronous motor can be directly arranged on the transmission shaft 2 to drive the transmission shaft 2 to rotate, thereby driving the rotary hub 3 to rotate; that is, the rotor assembly is mounted on the driving shaft 2, and the stator assembly is mounted on the casing 4, and the casing overcomes the rotating force and the rotating force of the driving shaft to be basically the same through the relation between the acting force and the reacting force, so that the tension and compression sensor is fixed and connected with the casing to indirectly obtain the stress or torque of the driving shaft.
Further, the bearing assembly 5 includes a main bearing 501 sleeved on the shell end cover 402, the main bearing 501 is mounted on the mounting seat 10 on the support frame 1, and bearing end covers 502 are respectively arranged at the inner side and the outer side, a bearing pressing plate 503 is further screwed between a pair of bearing end covers 502, the bearing pressing plate 503 is arc-shaped, and two ends of the bearing pressing plate 503 are respectively screwed on the mounting seat 10; the bearing assemblies are arranged in a pair. The bearing pressing plate 503 can fix the bearing end cover 502 and the main bearing 501 on the mounting seat 10, so as to reduce axial and circumferential shaking, and is convenient to mount and dismount.
Embodiment two:
the embodiment provides a mounting method of a chassis dynamometer rotating hub tension-compression sensor mounting structure, which comprises the steps that a driving assembly is mounted on a driving shaft 2 connected with a rotating hub 3, the driving shaft 2 and the driving assembly are mounted on a mounting seat 10 through a bearing assembly 5 together, and the mounting seat 10 is arranged on a supporting frame 1; the outer side wall of the support frame 1 is provided with a tension and compression sensor 8 through a mounting frame 9, the central axis of the tension and compression sensor 8 is perpendicular to the central axis of the transmission shaft 2, a pull rod assembly 7 is vertically connected to the tension and compression sensor 8, and the pull rod assembly 7 is connected with and fixes the casing 4 of the driving assembly through a pull seat 6.
The installation method is simple and effective, can maintain compact design of the whole structure of the rotating hub and the transmission shaft of the dynamometer, can be synchronously carried out in the installation process of the rotating hub, and the tension and compression sensor arranged on the side is easy to maintain and connect with a circuit.
Embodiment III:
the present embodiment provides a use state of the chassis dynamometer in the first embodiment.
As shown in fig. 9, two sets of four rotating hubs 3 are arranged in parallel in a dynamometer platform, the dynamometer platform is arranged in a pit, the upper surface of the dynamometer platform is level with the ground, and only a part of circular arc of each rotating hub 3 is exposed above the ground so as to allow a vehicle to run on the rotating hubs 3 for dynamometer test; the pull-press sensors are all located in the underground part, and in the test process, detection data obtained by the pull-press sensors can be obtained directly through an upper computer without frequent pit descending of personnel.
Usually, the arrangement of a rotating hub, a transmission shaft, a motor and the like of the chassis dynamometer occupies a larger space, but the chassis dynamometer in the application adopts a compact design, so that the axial size and the circumferential size are reduced as much as possible, and the pit volume is reduced as much as possible when a vehicle test can be carried out; the tension and compression sensor mounting structure is well adapted to the compact design, and the length of the transmission shaft is not increased additionally.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The mounting structure of the rotating hub tension-compression sensor of the chassis dynamometer is characterized by comprising a support frame, wherein a transmission shaft is arranged on the support frame, and one end of the transmission shaft extends out of the support frame and is connected with a rotating hub; the driving assembly is sleeved on the transmission shaft at the position above the support frame, a shell of the driving assembly is connected with the transmission shaft through a first transmission bearing, and a bearing assembly is connected between the shell and the support frame; a plurality of mounting plates are axially arranged on the outer circumference of the shell, and a pull seat is arranged on at least one mounting plate; the pull seat is movably connected with a pull rod assembly, the other end of the pull rod assembly is connected with a pull pressure sensor, the pull pressure sensor is arranged on a mounting frame, and the mounting frame is fixedly arranged on the supporting frame; the central axis of the tension and compression sensor is perpendicular to the central axis of the transmission shaft;
the driving assembly is a permanent magnet synchronous motor, the permanent magnet synchronous motor comprises a rotor assembly and a stator assembly, the rotor assembly is sleeved and fixed on the transmission shaft, and the stator assembly is arranged and installed in the casing; the shell comprises an annular shell, a circle of annular groove is formed in the outer circumference of the annular shell, and the annular groove is clamped and screwed with the mounting plate;
the support frame is of a plate frame structure and comprises a base plate, a pair of parallel side plates are arranged on two sides of the base plate, the side plates are multistage ladder-shaped trapezoidal plates, and the mounting frame is mounted on the outer sides of the side plates; a plurality of arc-shaped supporting plates are arranged between the pair of side plates, mounting seats are arranged on the arc-shaped supporting plates, the mounting seats are of semicircular groove structures, two axial ends of the mounting seats are respectively connected with and mounted on a shell of the driving assembly through the bearing assembly, and two sides, close to the side plates, of the outer circumference of each mounting seat are of a planar structure and are tightly abutted against the inner sides of the side plates;
the shell further comprises shell end covers which are in threaded connection with two ends of the annular shell, an axial flange structure is arranged in the middle of the shell end covers, the flange structure is provided with a stepped inner hole and a stepped outer peripheral surface, the flange structure is sleeved and abutted to the transmission shaft, a first transmission bearing is arranged between the stepped inner hole and the transmission shaft, and the bearing assembly is sleeved on the stepped outer peripheral surface; the annular grooves are internally clamped and screwed with the mounting plate at intervals of 90 degrees;
the bearing assembly comprises a main bearing sleeved on the shell, the main bearing is mounted on a mounting seat on the support frame, bearing end covers are respectively arranged on the inner side and the outer side of the main bearing, a bearing pressing plate is also in threaded connection between the bearing end covers, and the bearing pressing plate is arched, and two ends of the bearing pressing plate are respectively in threaded connection with the mounting seat; the bearing assemblies are arranged in a pair.
2. The chassis dynamometer hub pull-press sensor mounting structure according to claim 1, wherein the pull seat comprises a first vertical connecting plate which is in threaded connection with the mounting plate, a pair of parallel second vertical connecting plates are arranged on one surface of the first vertical connecting plate, which is far away from the mounting plate, the pair of second vertical connecting plates are perpendicular to the first vertical connecting plates and form a vertical opening, and the pair of second vertical connecting plates are connected with the pull rod assembly through a pin shaft; the pin shafts horizontally penetrate through a pair of second vertical connecting plates, pin shaft end covers are respectively arranged at the end parts of the pin shafts, and locking bolts are screwed outside the pin shaft end covers.
3. The chassis dynamometer hub pull-press sensor mounting structure of claim 2, wherein a reinforcing plate is connected between a pair of the second vertical connecting plates at the end of the pull rod assembly, which is staggered, and is also connected with the first vertical connecting plate; and an inclined rib plate is arranged between the outer side of at least one second vertical connecting plate and the first vertical connecting plate.
4. The chassis dynamometer hub pull-press sensor mounting structure according to claim 1, wherein the pull rod assembly comprises a pull rod nut, one end of the pull rod nut is provided with a first horizontal through hole, and the first horizontal through hole is used for being connected with the pull seat; the other end of the pull rod nut is provided with a vertical screw hole, the vertical screw hole is connected with a double-head screw rod, and the other end of the double-head screw rod is connected with the pull pressure sensor; and locking nuts are respectively sleeved at two ends of the double-headed screw, and a spring washer and a flat washer are sequentially arranged between the locking nuts and the pull rod nuts or between the locking nuts and the pull pressure sensor.
5. The chassis dynamometer hub pull-press sensor mounting structure of claim 4, wherein the pull-rod nut is elongated, and an end of the pull-rod nut with the first horizontal through hole is of a semicircular structure; the axis of the first horizontal through hole is parallel to the axis of the semicircular structure and is respectively perpendicular to the axis of the vertical screw hole, and the vertical screw hole is arranged at the middle position; the middle size of the double-end screw is larger than the sizes of the two ends, a plurality of rectangular planes are arranged on the outer circumference of the middle, and the central axis of the tension and compression sensor and the central axis of the double-end screw are coaxially arranged.
6. The chassis dynamometer hub pull-press sensor mounting structure of claim 1, wherein the mounting frame is disposed on a side surface of the supporting frame, the mounting frame comprises a horizontal mounting plate and a pair of inclined supporting plates disposed below the horizontal mounting plate, and the horizontal mounting plate and the inclined supporting plates are welded on side walls of the supporting frame.
7. A method for installing a mounting structure of a rotary hub tension-compression sensor of a chassis dynamometer according to claim 1, wherein the method comprises the steps of installing a driving assembly on a transmission shaft connected with a rotary hub, wherein the transmission shaft and the driving assembly are jointly installed on a mounting seat through a bearing assembly, and the mounting seat is arranged on a supporting frame; the outer side wall of the support frame is provided with a pull-press sensor through a mounting frame, the central axis of the pull-press sensor is perpendicular to the central axis of the transmission shaft, a pull rod assembly is vertically connected to the pull-press sensor, and the pull rod assembly is connected with and fixes the casing of the driving assembly through a pull seat.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110196996.8A CN113125166B (en) | 2021-02-22 | 2021-02-22 | Mounting structure and mounting method of chassis dynamometer rotating hub tension-compression sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110196996.8A CN113125166B (en) | 2021-02-22 | 2021-02-22 | Mounting structure and mounting method of chassis dynamometer rotating hub tension-compression sensor |
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| CN113125166B true CN113125166B (en) | 2023-04-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2007240233A (en) * | 2006-03-07 | 2007-09-20 | Ono Sokki Co Ltd | Chassis dynamometer |
| CN201302498Y (en) * | 2008-11-17 | 2009-09-02 | 成都成保发展股份有限公司 | Mounting structure for force transducer of auto chassis dynamometer |
| CN207095749U (en) * | 2017-08-31 | 2018-03-13 | 重庆凯测试验设备有限责任公司 | For the floating support structure of torque measurement and its electric dynamometer of composition |
| CN208125308U (en) * | 2018-04-18 | 2018-11-20 | 北京博科测试系统股份有限公司 | A kind of new automobile emission test road load system |
| CN108692961B (en) * | 2018-07-06 | 2024-02-13 | 湖北环一电磁装备工程技术有限公司 | Chassis dynamometer test bed driven by permanent magnet synchronous motor |
| CN110501170A (en) * | 2019-09-25 | 2019-11-26 | 洛阳合能电气有限公司 | A kind of outer rotor chassis dynamometer that permanent magnet synchronous motor directly drives |
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Effective date of registration: 20240815 Address after: 443000 Chengnan Industrial Park, Mingfeng Town, Yuan'an County, Yichang City, Hubei Province Patentee after: Huanyi electromagnetic technology (Yichang) Co.,Ltd. Country or region after: China Address before: 430000 building 19, West District, research and innovation center, Jiangxia District, Wuhan City, Hubei Province Patentee before: HUBEI HUANYEE ELECTROMAGNETIC EQUIPMENT ENGINEERING TECHNOLOGY Co.,Ltd. Country or region before: China |