CN213899648U

CN213899648U - Connecting structure of roller and eddy current retarder and automobile chassis dynamometer

Info

Publication number: CN213899648U
Application number: CN202022878049.0U
Authority: CN
Inventors: 李振峰; 许名群; 梁泳坚
Original assignee: Shenzhen Cosber Industrial Co ltd
Current assignee: Guangdong kangshibai Technology Co.,Ltd.
Priority date: 2020-12-03
Filing date: 2020-12-03
Publication date: 2021-08-06
Anticipated expiration: 2030-12-03

Abstract

The utility model relates to the technical field of dynamometers, and discloses a connecting structure of a roller and an eddy current retarder and an automobile chassis dynamometer, wherein the connecting structure comprises a roller, an eddy current retarder stator and an eddy current retarder rotor; the roller is connected with a roller shaft, and the roller shaft extends along the axial direction of the roller; the eddy current retarder stator is rotatably sleeved on the rolling shaft; the electric eddy current retarder rotor is fixedly arranged on the rolling shaft; when the roller rotates, the eddy current retarder rotor can rotate relative to the eddy current retarder stator; according to the connecting structure of the roller and the eddy current retarder, the eddy current retarder stator is rotatably sleeved on the roller through the roller, and the eddy current retarder rotor is fixedly arranged on the roller, so that when the roller rotates, the eddy current retarder rotor can rotate relative to the eddy current retarder stator; the structure is simplified by the structural mode, and the coaxiality is easier to control.

Description

Connecting structure of roller and eddy current retarder and automobile chassis dynamometer

Technical Field

The utility model relates to a dynamometer technical field especially relates to a connection structure of cylinder and eddy current retarder.

Background

The dynamometer for automobile chassis is a special machine for measuring dynamic property, chassis output power, emission index under multiple working conditions and oil consumption of automobile. The moment inertia of flywheel inertia is mainly used for simulating moment inertia and moment inertia of automobile linear motion mass when the automobile runs, a loading device such as an eddy current retarder is used for simulating air resistance, rolling resistance, climbing resistance and the like of a non-driving wheel, which are borne by the automobile in the running process, and a roller rotates to simulate a road surface so as to dynamically detect the running condition of the automobile.

In the prior art, when an automobile chassis dynamometer is used, a roller and an eddy current retarder of the automobile chassis dynamometer are generally fixed on a rack respectively through a bearing with a seat along the axial direction, and then the roller and the eddy current retarder are connected through a coupler. The structure is complex in installation, the coaxiality is difficult to control, and the accuracy of the dynamometer is influenced to a certain extent.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a connection structure of cylinder and eddy current retarder aims at solving prior art, and it is complicated with the cylinder and the eddy current retarder of vehicle chassis dynamometer machine along the installation when axial fixity through the shaft coupling, and the problem that has certain influence to the precision of dynamometer machine is the difficult control axiality

The utility model discloses a realize like this, the first aspect provides a connection structure of cylinder and eddy current retarder, include:

the roller is connected with a roller shaft, and the roller shaft extends along the axial direction of the roller;

the eddy current retarder stator is rotatably sleeved on the rolling shaft;

the eddy current retarder rotor is fixedly arranged on the rolling shaft; when the roller is rotated, the eddy current retarder rotor can rotate relative to the eddy current retarder stator.

Furthermore, the outer part of the rolling shaft is fixedly sleeved with inner rings of two bearings, the eddy current retarder stator is fixedly sleeved on the outer rings of the two bearings, and the two bearings are arranged at two ends of the eddy current retarder stator; the bearing inner ring can rotate relative to the bearing outer ring, and the roller rotates relative to the eddy current retarder stator.

Further, the bearing is a deep groove ball bearing.

Further, the roller is provided with a key groove, a key is installed in the key groove, and the eddy current retarder rotor is fixedly connected with the key to achieve the fixed connection of the eddy current retarder rotor and the roller.

Furthermore, the roller is provided with two key slots, and the two key slots are respectively arranged at two ends of the roller.

Further, the key is a flat key.

Further, the roller is arranged along the extending direction of one side of the length direction of the roller.

Further, the axle center of the roller is arranged over against the axle center of the roller.

In a second aspect, an automotive chassis dynamometer is provided that includes a connection structure having a drum and an eddy current retarder.

Further, connection structure still includes the survey arm, the survey arm is installed eddy current retarder stator surface, the length extending direction perpendicular to of survey arm the axial of roller bearing.

Further, the connecting structure further comprises a bearing with a seat, an inner ring of the bearing with the seat is fixedly sleeved on the rolling shaft, and a bearing seat of the bearing with the seat is fixedly arranged to realize the fixed installation of the automobile chassis dynamometer.

Compared with the prior art, the utility model discloses mainly there is following beneficial effect:

above-mentioned a connection structure of cylinder and eddy current retarder that provides through set up the roller bearing on the cylinder, rotationally overlaps the eddy current retarder stator on the roller bearing, with eddy current retarder rotor fixed mounting on the roller bearing for when the roller bearing rotates, eddy current retarder rotor can rotate for eddy current retarder stator. The eddy current retarder is directly installed on the roller by the structural mode, so that the eddy current retarder is prevented from being connected through the coupler, the structure is simplified, and the coaxiality is easier to control.

Drawings

Fig. 1 is a schematic structural diagram of an automobile chassis dynamometer provided by an embodiment of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is a schematic perspective view of an automotive chassis dynamometer provided by an embodiment of the present invention.

Reference numerals: 1-roller, 11-roller, 2-eddy current retarder stator, 3-eddy current retarder rotor, 4-bearing, 5-key, 6-force measuring arm, and 7-seated bearing.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The following describes the implementation of the present invention in detail with reference to specific embodiments.

Referring to fig. 1, fig. 1 shows a schematic structural diagram of an automotive chassis dynamometer provided by the present invention, and referring to fig. 2 and fig. 3, the present embodiment provides a connection structure of a drum and an eddy current retarder, including a drum 1, an eddy current retarder stator 2 and an eddy current retarder rotor 3.

The roller 1 is connected with a roller 11, and the roller 11 extends along the axial direction of the roller.

The eddy current retarder stator 2 is rotatably sleeved on the roller 11.

The electric eddy current retarder rotor 3 is fixedly arranged on the roller 11; when the rollers 11 rotate, the eddy current retarder rotor 3 can rotate relative to the eddy current retarder stator 2.

Above-mentioned connection structure of a cylinder and eddy current retarder who provides through set up roller 11 on cylinder 1, rotationally overlaps eddy current retarder stator 2 on roller 11, with eddy current retarder rotor 3 fixed mounting on roller 11 for when roller 11 rotates, eddy current retarder rotor 3 can rotate for eddy current retarder stator 2. The eddy current retarder is directly installed on the roller 11 by the structural mode, so that the phenomenon that the eddy current retarder is connected with the roller through a coupler is avoided, the structure is simplified, and the coaxiality is easier to control.

Specifically, when the automobile chassis dynamometer is powered on, the eddy current retarder stator 2 generates a magnetic field, when the roller 1 rotates, the roller 1 drives the roller 11 to rotate, and the roller 11 drives the eddy current retarder rotor 3 to rotate; the eddy current retarder rotor 3 cuts the magnetic line of force of the magnetic field to generate induction current, the magnetic field interacts with the induction current to generate braking torque to the eddy current retarder rotor 3, and according to the principle of acting force and reacting force, the eddy current retarder stator 2 is subjected to electromagnetic torque which is the same as the braking torque, and the size of the electromagnetic torque is equal to the driving torque of the roller. Therefore, the driving torque applied to the drum can be obtained by only measuring the electromagnetic torque applied to the stator 2 of the eddy current retarder.

As an embodiment of the present invention, the outer of the roller 11 is fixedly sleeved with the inner rings of the two bearings 4, the eddy current retarder stator 2 is fixedly sleeved on the outer rings of the two bearings 4, and the two bearings 4 are arranged at the two ends of the eddy current retarder stator 2; the inner ring of the bearing 4 can rotate relative to the outer ring of the bearing 4 for enabling the roller 11 to rotate relative to the eddy current retarder stator 2.

Specifically, in the prior art, a mode that the roller 11 and the shaft of the eddy current retarder rotor 3 are respectively mounted on the rack and connected through a coupler is generally adopted, in such a structure, two bearings 4 are required for connecting the roller 11 and the rack, two bearings 4 are also required for connecting the shaft of the eddy current retarder rotor 3 and the rack, and the structure totally needs four bearings 4. When the mechanism rotates at a high speed, too many bearings 4 can generate too large internal resistance of the bearings 4, and the measurement precision of the dynamometer is influenced. And in the embodiment provided by the utility model, only need two bearings 4 can realize being connected of roller bearing 11 and eddy current retarder stator 2, reduced the quantity of bearing 4 by a wide margin, promoted the measurement accuracy of dynamometer machine.

Preferably, the bearing 4 is a deep groove ball bearing 4. The deep groove ball bearing 4 has the characteristics of small friction resistance, high rotating speed, simple structure and convenient use, can be used on machine parts subjected to radial load or combined load acted by radial and axial directions simultaneously, and is a bearing which is most popular in production and most widely applied.

In some embodiments, the roller 11 has a key slot, the key slot is provided with a key 5, and the eddy current retarder rotor 3 and the key 5 form a fastening connection to realize a fixed connection between the eddy current retarder rotor 3 and the roller 11.

Specifically, the roller 11 is provided with a key groove, the key 5 is matched with the key groove, the key 5 is installed on the key groove, and the eddy current retarder rotor 3 is tightly sleeved on the outer ring of the roller 11 and tightly connected with the key 5 so as to realize the fixed connection between the eddy current retarder rotor 3 and the roller 11.

Preferably, the roller 11 has two key slots, and the two key slots are respectively disposed at two ends of the roller 11. This kind of structure can improve the stability that eddy current retarder rotor 3 and roller 11 are connected.

Further, the key 5 is a flat key. The flat key has simple structure, convenient disassembly and assembly and good centering property, and is suitable for occasions with high speed and needing to bear variable load and impact.

Further, a roller 11 is provided at one side of the drum 1.

Further, the axis of the roller 11 is arranged opposite to the axis of the drum 1. The structure can effectively improve the precision of the dynamometer.

The utility model also provides an automobile chassis dynamometer, including the connection structure of above-mentioned cylinder and eddy current retarder.

The automobile chassis dynamometer provided by the above is provided with the structure that the connecting structure of the roller and the eddy current retarder replaces the coupling connection, the installation is convenient, and the precision is higher.

Further, the automobile chassis dynamometer further comprises a force measuring arm 6, the force measuring arm 6 is installed on the surface of the eddy current retarder stator 2, and the length extending direction of the force measuring arm 6 is perpendicular to the axial direction of the rolling shaft 11.

In particular, the load arm 6 has a length, and a force sensor is mounted below the load arm 6. During power measurement, the electromagnetic torque acting on the eddy current retarder stator 2 enables the eddy current retarder stator 2 to swing around the rolling shaft 11, so that the force measuring arm 6 is driven to act on the force sensor, and an electric signal is output. Here, the product of the force and the length of the force-measuring arm 6 is the value of the electromagnetic torque applied to the stator 2 of the eddy current retarder, which is the driving torque applied to the roller 11.

Preferably, the automobile chassis dynamometer further comprises a bearing with seat 7, the bearing with seat 7 is arranged at two ends of the automobile chassis dynamometer, an inner ring of the bearing with seat 7 is fixedly sleeved on the rolling shaft 11, and a bearing seat of the bearing with seat 7 is fixedly arranged to realize the fixed installation of the automobile chassis dynamometer.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A connection structure of a drum and an eddy current retarder is characterized by comprising:

the eddy current retarder stator is rotatably sleeved on the rolling shaft;

2. The connecting structure of the roller and the eddy current retarder according to claim 1, wherein the outer part of the roller is fixedly sleeved with inner rings of two bearings, the stator of the eddy current retarder is fixedly sleeved on outer rings of the two bearings, and the two bearings are arranged at two ends of the stator of the eddy current retarder; the bearing inner ring can rotate relative to the bearing outer ring, and the roller rotates relative to the eddy current retarder stator.

3. The connection structure of the roller and the eddy current retarder according to claim 2, wherein the bearing is a deep groove ball bearing.

4. The connecting structure of the roller and the eddy current retarder according to claim 1, wherein the roller is provided with a key groove, a key is installed in the key groove, and the eddy current retarder rotor and the key form a fastening connection to realize a fixed connection of the eddy current retarder rotor and the roller.

5. The structure of claim 4, wherein the roller has two key slots, and the two key slots are respectively disposed at two ends of the roller.

6. A connection structure of a drum and an eddy current retarder according to claim 4 or 5, characterized in that the key is a flat key.

7. A connection structure of a roller and an eddy current retarder according to claim 1, wherein the axis of the roller is arranged opposite to the axis of the roller.

8. An automotive chassis dynamometer, characterized by comprising a connection structure with a drum and an eddy current retarder according to any one of claims 1-7.

9. The automotive chassis dynamometer of claim 8, wherein the connection structure further comprises a force-measuring arm, the force-measuring arm is mounted on a surface of the eddy current retarder stator, and a length extension direction of the force-measuring arm is perpendicular to an axial direction of the roller.

10. The automotive chassis dynamometer of claim 8, wherein the connection structure further comprises a bearing with a seat, an inner ring of the bearing with a seat is fixedly sleeved on the roller, and a bearing seat of the bearing with a seat is fixedly arranged to realize fixed installation of the automotive chassis dynamometer.