CN212871711U

CN212871711U - Universal interface structure of high-rotating-speed output test bed

Info

Publication number: CN212871711U
Application number: CN202022355488.3U
Authority: CN
Inventors: 唐良慧; 兰家水; 刘清泉; 郭永
Original assignee: Chongqing University Of Technology & Tsinghua Automotive Research Institute & Linktron Measurement And Control Technology Co ltd
Current assignee: Chongqing University Of Technology & Tsinghua Automotive Research Institute & Linktron Measurement And Control Technology Co ltd
Priority date: 2020-10-21
Filing date: 2020-10-21
Publication date: 2021-04-02
Anticipated expiration: 2030-10-21

Abstract

The utility model relates to a general interface structure of a high-speed output test bed, which comprises an output main shaft, wherein the output main shaft is provided with an output interface end and a driving connecting end, the end surface of the output interface end is provided with a concave taper hole, the edge of the orifice of the taper hole is provided with two support lugs which are outwards protruded along the axial direction of the output main shaft, and the two support lugs are arranged in a central symmetry mode by using the axis of the output main shaft; the output interface end is detachably and fixedly connected with an interface conversion unit, one end of the interface conversion unit is a fixed core end extending into the taper hole, the fixed core end is provided with a taper matched with the taper hole, and the other end of the interface conversion unit protrudes out of the output interface end and is provided with a universal connecting part so as to facilitate output connection. Interface conversion unit fixed connection becomes the normality in detecting the use in the output interface end, generally no longer dismantles, by test piece lug connection in interface conversion unit's general connecting portion, no longer need special processing connection pyramis on the frock, reduces the degree of difficulty, and convenient the connection has improved commonality, suitability.

Description

Universal interface structure of high-rotating-speed output test bed

Technical Field

The utility model belongs to the technical field of the test of vehicle among the physics, concretely relates to high rotational speed output test bench general interface structure.

Background

As a matching manufacturer of a finished automobile manufacturing enterprise, components such as a motor, a gearbox, a transmission system and the like produced by the finished automobile manufacturing enterprise need to be subjected to performance detection before the finished automobile manufacturing enterprise is delivered, and relevant detection data reports are provided to serve as quality certificates of component products during delivery. On the test bench of various automobile parts, all there is power (moment of torsion) output mechanism generally, supports power output mechanism's output shaft through the bearing frame, and the output shaft free end is reconnected by the test piece, thereby can drive the implementation of being convenient for detect by the test piece rotation, can refer to prior art, if: CN110109016A, CN208313425U, CN 208459020U. The free end of the output shaft is connected with the tested piece in various forms, such as key connection, coupling connection and the like, but the connection is only limited to power output at a common rotating speed. On the output test bed of high rotational speed, in order to guarantee feasibility and stability of high rotational speed output, it is unnecessary for the manufacturer of the test bed to spend the great cost to research and develop the high rotational speed power output mechanism, it usually has chosen to purchase existing motor and main shaft used for processing center equipment directly, change to the test bed, can provide the high rotational speed output of more than ten thousand revolutions per minute effectively, and output stably, help to guarantee the accuracy that the subsequent performance test detects very much. The inconvenience lies in that the free end of the spindle used for processing center equipment is in a form of connecting a conical tool holder such as BT40, and can take part in fig. 1, namely the conical hole 23, and the end surface is also provided with two support lugs 24 (embedded in the tool holder abdicating groove and driving the tool holder to rotate when connecting the tool holder), and after such a connection interface is sold with a test bench, inconvenience is brought to a user in connecting the tested piece and the free end of the output shaft, and for different tested pieces, the user needs to specially process a connection cone part and two cone part abdicating grooves (similar to the tool holder) on the connection tool when processing and manufacturing the connection tool, so that the requirements on processing precision and surface roughness are high, the use cost is increased, and after the connection with the output shaft through taper wedging, the disassembly after the test is completed is also very inconvenient. Therefore, the manufacturing side of the test bed needs to further improve the interface structure of the product.

Disclosure of Invention

The above-mentioned not enough to prior art, the to-be-solved technical problem of the utility model is to provide a general interface structure of high rotational speed output test bench, avoid by the pivot of test piece and the inconvenient problem of current high rotational speed output shaft connection, gain convenient the connection, improve the effect of suitability.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the universal interface structure of the high-rotating-speed output test bed comprises an output main shaft, wherein the output main shaft is provided with an output interface end and a driving connecting end for connecting a driving motor, the end surface of the output interface end is provided with a concave taper hole, the edge of an orifice of the taper hole is outwards convexly provided with two support lugs along the axial direction of the output main shaft, and the two support lugs are arranged in central symmetry with the axis of the output main shaft; the output interface end is detachably and fixedly connected with an interface conversion unit, one end of the interface conversion unit is a fixed core end extending into the taper hole, the fixed core end is provided with a taper matched with the taper hole, and the other end of the interface conversion unit protrudes out of the output interface end and is provided with a universal connecting part so as to facilitate output connection.

Further perfecting the technical scheme, the interface conversion unit is also provided with a driving part which can be attached to the support lug in a transmission way in the rotating direction of the output main shaft.

Furthermore, the interface conversion unit comprises a core fixing piece and is formed into a core fixing end through the core fixing piece, the core fixing piece is a rotary piece, the outer circumferential surface of the core fixing piece is a taper surface matched with the taper hole, and a positioning cylindrical section is convexly arranged on the end surface of the large end of the core fixing piece; the interface conversion unit further comprises an external disk body, the external disk body is detachably and fixedly connected to the end face of the output interface end through a fastener, a positioning counter bore corresponding to the positioning cylindrical section is further formed in the end face, facing the output main shaft, of the external disk body, the outer circumferential surface of the positioning core piece is attached to the taper hole, the positioning cylindrical section extends into the positioning counter bore, and a gap is formed between the end face of the free end of the positioning cylindrical section and the bottom face of the positioning counter bore; the universal connecting part is arranged on the external tray body.

Furthermore, a rubber part is arranged between the external disk body and the core fixing part and is compressed between the end face of the free end of the positioning cylindrical section and the bottom face of the positioning counter bore.

Furthermore, an accommodating counter bore is formed in the end face of the free end of the positioning cylindrical section, the rubber piece is arranged in the accommodating counter bore, and the rubber piece is compressed between the bottom face of the accommodating counter bore and the bottom face of the positioning counter bore.

Furthermore, the rubber piece is cylindrical and corresponds to the accommodating counter bore.

Furthermore, the fasteners are a plurality of bolts which are circumferentially arranged at intervals and penetrate through the external disc body to be connected to the end face of the output interface end.

Furthermore, a plurality of internal thread holes are circumferentially distributed on the end face, facing outwards, of the external disk body and form the universal connecting part, and the outer circle of the external disk body is coaxial with the positioning counter bore so as to be used as a positioning spigot.

Furthermore, the end face, facing the output main shaft, of the external disk body is also provided with a yielding groove, and the support lugs correspondingly fall into the yielding grooves.

Furthermore, the output main shaft can be rotatably connected to the supporting bearing seat, and a through vent hole is formed in the interface conversion unit along the axis of the output main shaft.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses a general interface structure of high rotational speed output test bench, output interface end through interface conversion unit fixed connection at the output main shaft, and this state is the normality in the detection use, generally no longer dismantle, by test piece lug connection in interface conversion unit's general connecting portion, general connecting portion can be flange structure commonly used, as a general interface, also can be suitable for with the batch that corresponds to be connected by the test piece, the interface form of taking apart, thus, when being connected frock by the detection of test piece by the test piece or manufacturing, no longer need all to process out specially to connect the pyramis and step down the groove, reduce the degree of difficulty, choose for use more conventional low-cost, be suitable for the connected mode of use can, in order to facilitate the connection, improve the commonality, the suitability.

Drawings

FIG. 1 is a schematic diagram of a spindle interface structure according to the background art;

FIG. 2 is a schematic structural diagram of a general interface structure of a high-speed output test bed according to an embodiment;

FIG. 3 is a cross-sectional view of a high speed output test stand universal interface configuration of an exemplary embodiment;

FIG. 4 is an enlarged view of a portion of FIG. 3;

FIG. 5 is a schematic structural view (enlarged) of a circumscribed disk body part in an embodiment;

the device comprises a supporting bearing seat 1, an output main shaft 2, an output interface end 21, a driving connection end 22, a taper hole 23, a support lug 24, an interface conversion unit 3, a core fixing piece 31, a positioning cylindrical section 311, an accommodating counter bore 312, a rubber piece 32, an external disk body 33, a positioning counter bore 331, an internal thread hole 332, a yielding groove 333 and a bolt 4.

Detailed Description

The following describes the present invention in further detail with reference to the accompanying drawings.

Referring to fig. 2-5, the high-speed output test bed universal interface structure of the embodiment includes an output spindle 2, the output spindle 2 is rotatably connected to a supporting bearing seat 1, the output spindle 2 has an output interface end 21 and a driving connection end 22 for connecting a driving motor (a torque sensor is usually further disposed between the driving connection end 22 and the driving motor so as to provide more detectable items), an end surface of the output interface end 21 is provided with a recessed taper hole 23, the taper hole 23 is usually a morse taper hole 23, and different combination depths can be respectively used for connecting tool shanks of BT30, 40, 50, etc.; the edge of the orifice of the taper hole 23 is provided with two support lugs 24 which protrude outwards along the axial direction of the output main shaft 2, and the two support lugs 24 are arranged in central symmetry with the axis of the output main shaft 2; the output interface end 21 is detachably and fixedly connected with an interface conversion unit 3, one end of the interface conversion unit 3 is a fixed core end extending into the taper hole 23, the fixed core end has a taper matched with the taper hole 23 so as to be tightly attached to the taper hole 23 to ensure coaxiality, and the other end of the interface conversion unit 3 protrudes out of the output interface end 21 and is provided with a general connection part facilitating conventional connection so as to facilitate output connection. The interface conversion unit 3 can be detachably and fixedly connected to the output interface end 21 of the output spindle 2 through a fastener, and during the fixed connection, the core fixing end and the taper hole 23 should be in a tight state. It can be understood that the output spindle 2, which is a finished spindle of the machining center, generally has an inner hole, and correspondingly, in order to avoid air lock, a through air hole is also formed in the interface conversion unit 3 along the axial position of the output spindle 2, and the size is not limited.

The universal interface structure of the high-rotation-speed output test bed of the embodiment is fixedly connected to the output interface end 21 of the output spindle 2 through the interface conversion unit 3, and the state is a normal state in the detection use process, and generally is not dismounted, and the tested piece is directly connected to the universal connecting part of the interface conversion unit 3, wherein the universal connecting part can be a common flange structure and used as a universal interface, and can also be an interface form suitable for being connected and dismounted with the corresponding batch tested piece. In practice, the interface conversion unit 3 may be in an integral form, or may be formed by combining a plurality of components.

In this embodiment, the interface conversion unit 3 includes a fixed core member 31, a rubber member 32 and a connection disc body, the fixed core member 31 is formed as the fixed core end, the fixed core member 31 is a rotary member, an outer circumferential surface of the fixed core member 31 is a taper surface adapted to the taper hole 23, a large end surface of the fixed core member 31 is provided with a positioning cylindrical section 311 in a protruding manner, and the positioning cylindrical section 311 is coaxial with the outer circumferential surface of the fixed core member 31; the external disk body 33 is detachably and fixedly connected to the end face of the output interface end 21 through a fastener so as to protrude out of the output interface end 21, the end face, facing the output spindle 2, of the external disk body 33 is attached to the end face of the output interface end 21, the end face, facing the output spindle 2, of the external disk body 33 is further provided with a positioning counter bore 331 corresponding to the positioning cylindrical section 311, the outer circumferential surface of the fixed core 31 is closely attached to the taper hole 23, the positioning cylindrical section 311 extends into the positioning counter bore 331, a gap is formed between the free end face of the positioning cylindrical section 311 and the bottom face of the positioning counter bore 331 so as to avoid over-positioning or interference, and when the external disk body is fastened and connected, the end face, facing the output spindle 2, of the external disk body is always attached to the end face of the; the universal connection part is arranged on the external tray body 33.

Thus, the outer diameter of the positioning cylindrical section 311 is equivalent to the inner diameter of the positioning counter bore 331, and the positioning cylindrical section 311 extends into the positioning counter bore 331 to be in sliding fit, so that the centering effect is achieved; during assembly, the core fixing member 31 can be pressed in the taper hole 23, the external disk body 33 is connected to the end face of the output interface end 21 through a fastener, and the positioning counter bore 331 is sleeved on the positioning cylindrical section 311 in the connection process, so that the assembly coaxiality is guaranteed. Is favorable for the stability of later use.

A rubber piece 32 is further arranged between the external disc 33 and the fixed core piece 31, and the rubber piece 32 is compressed between the free end face of the positioning cylindrical section 311 and the bottom face of the positioning counterbore 331.

Therefore, the assembly is more convenient, and the effect of ensuring the coaxiality is better and more reliable. In the process that the external disk 33 is connected to the end face of the output interface end 21 through the fastener, the rubber piece 32 can keep pressing the fixed core piece 31, the fixed core piece 31 does not need to be considered to be pressed in the taper hole 23 before assembly, and in the connection process, along with the fact that the compression amount of the rubber piece 32 is larger and larger, the fixed core piece 31 and the taper hole 23 are closer and closer, therefore, centering becomes a dynamic process, the centering is continuously corrected, the centering acts on the external disk 33 which is not completely fastened, and the coaxiality of the assembly connection is better guaranteed.

The free end face of the positioning cylindrical section 311 is provided with a containing counterbore 312, the rubber piece 32 is arranged in the containing counterbore 312 so as to be convenient to mount, and the rubber piece 32 is compressed between the bottom surface of the containing counterbore 312 and the bottom surface of the positioning counterbore 331.

Therefore, the rubber part 32 is convenient to assemble, the rubber part 32 can be placed in the accommodating counter bore 312 before assembly, and the position deviation of the rubber part 32 in the pressing process is avoided.

The rubber member 32 is cylindrical and has a diameter corresponding to the inner diameter of the receiving counterbore 312 so as to be better constrained in the compression deformation process, so that the rubber member is deformed in a direction required by the design and generates resilience in a direction required by the design, thereby ensuring the exertion of the function and efficacy.

It can be understood that the interface conversion unit 3 in this embodiment includes three parts, namely, the core fixing member 31, the rubber member 32 and the connecting disc body, and then, the axial positions of the core fixing member 31, the rubber member 32 and the connecting disc body are all provided with vent holes.

The fastening piece is a plurality of bolts 4, the bolts 4 are circumferentially arranged (along the circumferential direction of the output main shaft 2) at intervals, the screw part penetrates through the external disc body 33 and then is connected to the end face of the output interface end 21, and correspondingly, threaded holes for connection are also machined in the end face of the output interface end 21.

Wherein, be the circumference (along the circumference of output main shaft 2) equipartition on the terminal surface of external disk body 33 towards the outside and be equipped with a plurality of internal thread holes 332 and form into general connecting portion, the excircle of external disk body 33 with location counter bore 331 is coaxial so that can regard as the location tang to use.

Therefore, a universal interface form similar to a flange structure is selected, the applicability is good, and the outer circle of the external disk body 33 can be used for connecting and positioning.

It can be understood that the end surface of the external disk body 33 facing the output spindle 2 is further provided with a yielding groove 333, and the support lug 24 correspondingly falls into the yielding groove 333. During implementation, if the machining size is standard, the through hole for the bolt 4 to pass through on the external disk body 33 is matched with the circumferential position of the abdicating groove 333, and the abdicating groove 333 can also be a driving part which is attached to the support lug 24 in the rotating direction of the output main shaft 2 in a transmission manner, so as to assist in driving and rotating, and the whole stress performance of the structure is better.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. The universal interface structure of the high-rotating-speed output test bed comprises an output main shaft, wherein the output main shaft is provided with an output interface end and a driving connecting end for connecting a driving motor, the end surface of the output interface end is provided with a concave taper hole, the edge of an orifice of the taper hole is outwards convexly provided with two support lugs along the axial direction of the output main shaft, and the two support lugs are arranged in central symmetry with the axis of the output main shaft; the method is characterized in that: the output interface end is detachably and fixedly connected with an interface conversion unit, one end of the interface conversion unit is a fixed core end extending into the taper hole, the fixed core end is provided with a taper matched with the taper hole, and the other end of the interface conversion unit protrudes out of the output interface end and is provided with a universal connecting part so as to facilitate output connection.

2. The high-speed output test bed universal interface structure of claim 1, characterized in that: the interface conversion unit is also provided with a driving part which can be attached to the support lug in a transmission way in the rotation direction of the output main shaft.

3. The high-speed output test bed universal interface structure of claim 1, characterized in that: the interface conversion unit comprises a core fixing piece and forms a core fixing end through the core fixing piece, the core fixing piece is a rotary piece, the outer circumferential surface of the core fixing piece is a taper surface matched with the taper hole, and a positioning cylindrical section is convexly arranged on the end surface of the large end of the core fixing piece; the interface conversion unit further comprises an external disk body, the external disk body is detachably and fixedly connected to the end face of the output interface end through a fastener, a positioning counter bore corresponding to the positioning cylindrical section is further formed in the end face, facing the output main shaft, of the external disk body, the outer circumferential surface of the positioning core piece is attached to the taper hole, the positioning cylindrical section extends into the positioning counter bore, and a gap is formed between the end face of the free end of the positioning cylindrical section and the bottom face of the positioning counter bore; the universal connecting part is arranged on the external tray body.

4. The high-speed output test bed universal interface structure of claim 3, wherein: and a rubber part is also arranged between the external disk body and the fixed core part and is compressed between the free end face of the positioning cylindrical section and the bottom surface of the positioning counter bore.

5. The high-speed output test bed universal interface structure of claim 4, wherein: the free end face of the positioning cylindrical section is provided with an accommodating counter bore, the rubber piece is arranged in the accommodating counter bore, and the rubber piece is compressed between the bottom face of the accommodating counter bore and the bottom face of the positioning counter bore.

6. The high-speed output test bed universal interface structure of claim 5, wherein: the rubber piece is cylindrical and corresponds to the accommodating counter bore.

7. The high-speed output test bed universal interface structure of claim 3, wherein: the fastener is a plurality of bolts, and the bolts are circumferentially arranged at intervals and penetrate through the external disc body to be connected to the end face of the output interface end.

8. The high-speed output test bed universal interface structure of claim 3, wherein: the outer circle of the external disk body is coaxial with the positioning counter bore so as to be used as a positioning spigot.

9. The high-speed output test bed universal interface structure of claim 3, wherein: the end face of the external disk body facing the output main shaft is also provided with a yielding groove, and the support lug correspondingly falls into the yielding groove.

10. The high rotational speed output test bed universal interface structure of any one of claims 1-9, characterized in that: the output main shaft is rotatably connected to the supporting bearing seat, and a through air vent is formed in the interface conversion unit along the axis of the output main shaft.