CN110907164A

CN110907164A - Automobile transmission shaft shell performance test bench

Info

Publication number: CN110907164A
Application number: CN201911314621.6A
Authority: CN
Inventors: 张仁昌
Original assignee: Hubei Xin Henl Environmental Equipment Co Ltd
Current assignee: Hubei Xin Henl Environmental Equipment Co Ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-03-24

Abstract

The invention discloses a performance test board for an automobile transmission shaft shell, which mainly comprises an underframe, a clamping mechanism for clamping a transmission shaft, a transmission mechanism for driving the transmission shaft to rotate and a swinging mechanism for driving a universal joint to swing, wherein the transmission mechanism is arranged in the middle of the underframe, the clamping mechanism is arranged on the underframe and positioned at two sides of the transmission mechanism, and the swinging mechanism is also arranged on the underframe and positioned at two sides of the clamping mechanism. The automobile dust cover test bed is simple in structure and convenient to process, and can be suitable for detecting the durability of various automobile transmission shaft dust covers.

Description

Automobile transmission shaft shell performance test bench

Technical Field

The invention relates to the technical field of equipment research and development, in particular to a performance test board for an automobile transmission shaft shell.

Background

As is known, a transmission shaft dustproof cover is an important part in the field of automobiles, and the performance of the dustproof cover directly affects the use of a universal joint of an automobile transmission shaft, so that the operation stability and the safety of the automobile are affected. In a car, the dust cover of the transmission shaft is positioned outside the universal joint at the side of the wheel and the universal joint at the side of the differential mechanism, and the main function is to protect the universal joints from being influenced by external silt, dust and the like, so as to protect the transmission stability of the transmission shaft. In the use process of the dust cover, due to the influence of various environmental factors such as atmosphere ozone, high and low temperature, salt spray corrosion and the like, the dust cover is easily abraded and cracked due to the simultaneous rotation motion and deflection motion; it is therefore increasingly important to detect the durability of the dust cover. However, no disclosure of a detection device message regarding the durability of a dust cover has been found.

Disclosure of Invention

In view of the above, the present invention aims to provide an automobile dust cover test bed which has a simple structure and is convenient to process, and can be applied to the durability detection of various automobile transmission shaft dust covers.

The purpose of the invention is realized by the following technical scheme:

the invention provides a performance test board for an automobile transmission shaft shell, which mainly comprises an underframe, a clamping mechanism for clamping a transmission shaft, a transmission mechanism for driving the transmission shaft to rotate and a swinging mechanism for driving a universal joint to swing, wherein the transmission mechanism is arranged in the middle of the underframe, the clamping mechanism is arranged on the underframe and positioned at two sides of the transmission mechanism, and the swinging mechanism is also arranged on the underframe and positioned at two sides of the clamping mechanism.

On the basis of the structure, wherein:

the clamping mechanism is symmetrically divided into two clamping parts, wherein each clamping part is provided with a support frame, the bottom of each support frame can be detachably and movably fixed on the underframe, the upper part of each support frame is provided with a pressing wheel for abutting against the transmission shaft and two supporting wheels for supporting the transmission shaft through a bearing, and the axes of the pressing wheel and the two supporting wheels are parallel to each other and can freely rotate. Wherein: two sides of the upper part of the support frame are respectively and correspondingly provided with two upright posts, the riding wheel is fixed on the upper part of the support frame through the upright posts, the upper top of one upright post is also pivotally connected with one end of a trapezoidal pressure plate through a pin shaft, the other end of the pressure plate is detachably connected with the other upright post through a buckle, and the pressing wheel is fixed on the upper part of the support frame through being fixed in the middle of the top of the pressure plate. Or the connecting line of the three wheel centers of the pinch roller and the two supporting wheels is triangular, and the relative distance between the three wheel centers is adjustable. Or two pairs of pipe clamps for preventing the transmission shaft from moving in the axial direction can be arranged between the two pairs of riding wheels.

The transmission mechanism is provided with a transmission motor, and the transmission motor is connected with the transmission shaft to be detected through a belt. The transmission mechanism is further provided with a fixing plate, the bottom of the fixing plate is detachably and movably fixed on the underframe, a V-shaped groove is formed in the middle of the fixing plate in the vertical direction, two idle wheels are symmetrically and detachably and movably fixed in the V-shaped groove, a lead screw which can only do rotary motion is fixed on one side of the V-shaped groove, a tension wheel is fixed on the lead screw through a lead screw nut, the transmission motor is fixed at the position of one side below the fixing plate, the belt sequentially winds a transmission shaft to be measured, the tension wheel and an output shaft of the transmission motor, and the two idle wheels are pressed on two sides of the winding ring of the belt.

The swing mechanism is symmetrically divided into two swing parts, wherein each swing part mainly comprises a swing motor, an eccentric wheel and a crank connecting rod mechanism, the wheel center of the eccentric wheel is connected with the output shaft of the swing motor through a coupler, one end of the crank connecting rod mechanism is hinged with the wheel surface of the eccentric wheel, and the other end of the crank connecting rod mechanism is hinged with a tested universal joint. The swing motor and the eccentric wheel are arranged on a base, and the base is detachably and movably fixed on the base frame. Or a guide plate is further arranged between each swinging part and the clamping mechanism, a guide groove for the universal joint to penetrate through and extend out is formed in the vertical direction of the guide plate, and the bottom of the guide plate can be detachably and movably fixed on the underframe.

Compared with the prior art, the invention has the advantages that: the automobile dust cover test bed is realized by adopting three mechanisms, namely a clamping mechanism for clamping a transmission shaft, a transmission mechanism for driving the transmission shaft to rotate and a swinging mechanism for driving a universal joint to swing, has simple structure and convenient processing, and can be suitable for detecting the durability of various automobile transmission shaft dust covers.

In addition, all three mechanisms are arranged on the bottom frame, and the distance between the three mechanisms can be freely adjusted in the horizontal direction of the bottom frame, so that the three mechanisms are suitable for transmission shafts with different lengths.

Secondly, the clamping mechanism supports the transmission shaft from the lower side by two riding wheels provided with bearings, and then presses the transmission shaft from the upper side by a pressing wheel, the riding wheels and the pressing wheel can freely rotate along with the transmission shaft, the distance between the two riding wheels can be freely adjusted, and a pair of pipe clamps are arranged on the side of the riding wheels to prevent the transmission shaft from axially moving, so that the whole structure is compact in installation and extremely close to the real situation of being installed on an automobile.

Furthermore, the transmission mechanism driving the transmission shaft to rotate drives the belt by the transmission motor and then drives the transmission shaft to rotate by the two idle wheels, and because no load exists, the transmission shaft is driven to rotate by the friction force between the flat belt and the transmission shaft, so the friction force between the belt and the transmission shaft is adjusted by a tension pulley capable of freely adjusting the tension force; the swing mechanism driving the universal joint to swing is characterized in that a swing motor drives an eccentric wheel to drive the universal joints at two ends of a transmission shaft to swing through a crank connecting rod mechanism, and the eccentric distance is adjustable, so that the swing angle range of the universal joints is adjustable.

Finally, the mechanism is provided with a guide groove to restrain the universal joint from deflecting in one direction.

Drawings

For ease of illustration, the present invention is described in detail by the following preferred embodiments and the accompanying drawings.

FIG. 1 is a schematic front view of the dust cover test bed of the present invention.

Fig. 2 is a schematic view of the structure seen from direction a in fig. 1.

FIG. 3 is a schematic perspective view of the dust cover test stand for the vehicle of the present invention.

Detailed Description

Referring to fig. 1 to 3 together, the test bed for dust covers of automobiles of the present invention mainly comprises a clamping mechanism for clamping the transmission shaft 4, a transmission mechanism for driving the transmission shaft 4 to rotate, a swing mechanism for driving the universal joint 6 to swing, a guide plate 7, and an underframe 10 formed with a T-shaped groove. Wherein:

the transmission mechanism is installed in the middle of the chassis 10, and mainly comprises a transmission motor 3, a belt 31 and a fixing plate 33, a T-shaped groove (or dovetail groove) is fitted and screwed between the bottom of the fixing plate 33 and the chassis 10, so that the fixing plate 33 can be detachably fixed on the chassis 10, a V-shaped groove 35 is formed in the middle of the fixing plate 33 in the vertical direction, two idle wheels 37 are symmetrically and detachably fixed in the V-shaped groove 35, a lead screw 39 capable of only rotating is fixed on one side of the V-shaped groove 35, a tension wheel 38 is fixed on the lead screw 39 through a lead screw nut (not shown), the transmission motor 3 is fixed in a position on the lower side of the fixing plate 33, the belt 31 sequentially winds the transmission shaft 4 to be measured, the tension wheel 38 and an output shaft (not shown) of the transmission motor 3, while the two idlers 37 press against both sides of the turn around which the belt 31 is wound to tension the belt 31. In addition, a hand wheel 36 is fixedly connected to the free end of the screw 39.

The clamping mechanism is symmetrically divided into two clamping parts, which are respectively and correspondingly mounted on the underframe 10 and located on two sides of the transmission mechanism. Each clamping part is provided with a support frame 28, the bottom of the support frame 28 is matched with the bottom frame 10 through a T-shaped groove (or a dovetail groove) and is fixed through threads, so that the support frame 28 can be detachably and movably fixed on the bottom frame 10, the upper part of the support frame 28 is provided with a pressing wheel 22 for abutting against the transmission shaft 4 and two supporting wheels 21 for supporting the transmission shaft 4 through a bearing, the connecting line of three wheel centers of the pressing wheel 22 and the two supporting wheels 21 is triangular, and the axes of the pressing wheel 22 and the two supporting wheels 21 are parallel to each other and can freely rotate. Two upright posts 27 are correspondingly formed on two sides of the upper part of each supporting frame 28, the two riding wheels 21 are detachably fixed on the upper part of the supporting frame 28 by the two upright posts 27 in a relatively moving way, wherein the upper top part of one upright post 27 is also connected with one end of a trapezoidal pressure plate 23 in a pivoting way by a pin shaft, the other end of the pressure plate 23 is detachably connected with the other upright post 27 by a buckle 24 (or a spring buckle and other structures which are conventional structures and are not described in detail herein), the press wheel 22 is detachably fixed on the middle part of the top part of the pressure plate 23 in a vertically moving way and is fixed on the upper part of the supporting frame 28, and the relative distance between the press wheel 22 and three wheel centers of the two riding wheels 21 is adjustable, so that the transmission shaft 4 with different diameters can be adapted. In addition, two pairs of pipe clamps 5 can be arranged between the two pairs of riding wheels 21 to prevent the transmission shaft 4 from moving in the axial direction.

The swing mechanism is also symmetrically divided into two swing portions, which are respectively and correspondingly mounted on the bottom frame 10 and located at two sides of the clamping mechanism. Each of the swinging parts is mainly composed of a swinging motor 7, an eccentric wheel 71 and a crank link mechanism 73, the swinging motor 7 and the eccentric wheel 71 are mounted on a base 75, and the base 75 is matched with the chassis 10 through a T-shaped groove (or a dovetail groove) and is fixed through threads, so that the base 75 can be detachably and movably fixed on the chassis 10. The wheel center of the eccentric wheel 71 is connected with the output shaft of the swing motor 7 through a coupler, one end of the crank-link mechanism 73 is hinged with the wheel surface of the eccentric wheel 71, and the other end of the crank-link mechanism 73 is hinged with the tested universal joint 6. In addition, a guide plate 77 is further provided between each swing portion and the clamping mechanism, a guide groove 79 for allowing the universal joint 6 to pass through is formed in the guide plate 77 in the vertical direction, and a bottom portion of the guide plate 77 is engaged with the bottom frame 10 through a T-shaped groove (or a dovetail groove) and is fixed by threads, so that the guide plate 77 can be detachably and movably fixed on the bottom frame 10.

The automobile dust cover test bed has the following specific use process:

when the clamping mechanism of the automobile dust cover test bed clamps the transmission shaft 4, the buckle 24 is loosened, the trapezoidal pressing plate 23 is lifted to rotate to the other side, and the pressing wheel 22 is lifted at the same time; the transmission shaft 4 is placed on the two pairs of supporting wheels 21 through the belt 31, the position of the transmission shaft 4 is adjusted to fix the two ends of the transmission shaft, then the trapezoidal pressing plate 23 is placed, the buckle 24 is buckled, the height of the pressing wheel 22 is adjusted to enable the pressing wheel to tightly press the transmission shaft 4, and the transmission shaft 4 can freely rotate. The press wheel 22 is adjustable in height, and the relative distance between the two riding wheels is adjustable, so that the transmission shaft 4 with different diameters can be suitable. The whole clamping mechanism is fixed on the bottom frame 10, and the horizontal distance between the two clamping parts can be freely adjusted so as to be suitable for transmission shafts 4 with different lengths.

After the transmission shaft 4 is clamped, the handle 36 is shaken to drive the tension pulley 38 to tension the belt 31 and then lock the tension pulley 38, but the tension pulley 38 can rotate freely. The two idle wheels 37 can be freely adjusted in the V-shaped sliding groove 35, the transmission motor 3 provided with the driving pulley can drive the transmission shaft 4 to rotate through the belt 31 after being started, and the riding wheel 21 and the pressing wheel 22 for clamping the transmission shaft 4 are both provided with bearings, and the two ends of the transmission shaft 4 have no load, so that the transmission shaft 4 can be driven to rotate by the mechanism, and the rotating speed of the transmission motor 3 can be controlled by adjusting the rotating speed.

Finally, the universal joint 6 is swung back and forth in the guide groove 79 by adjusting the position (i.e., eccentricity) at which the crank link mechanism 73 is connected to the tread of the eccentric 71. When the eccentricity of the eccentric wheel 71 is zero, the universal joint 6 does not swing back and forth, and only idles; if the eccentricity of the eccentric 71 is adjusted to be non-zero, the universal joint 6 can swing back and forth. Therefore, the amplitude of the yaw of the universal joint 6 can be realized by adjusting the eccentricity, and the frequency of the yaw can be realized by adjusting the rotating speed of the motor driving the eccentric wheel 71. And the transmission shaft dust cover and the universal joint dust cover are respectively covered on the transmission shaft 4 and the universal joint 6, so that the test of the transmission shaft dust cover and the universal joint dust cover is realized.

Claims

1. The utility model provides an automobile transmission shaft shell performance test platform which characterized in that, automobile dust cover test platform mainly includes the chassis, is used for the clamping mechanism of clamping transmission shaft, drives the drive mechanism of transmission shaft gyration and drives the swing mechanism of universal joint yaw, and wherein this drive mechanism installs at the middle part of chassis, and clamping mechanism installs on this chassis and is located this drive mechanism's both sides, and this swing mechanism also installs on this chassis and is located the both sides of this clamping mechanism.

2. The dust cover testing stand for automobiles as claimed in claim 1, wherein the clamping mechanism is divided into two clamping parts symmetrically, each clamping part is provided with a supporting frame, the bottom of the supporting frame is fixed on the underframe in a detachable and movable manner, a pressing wheel for pressing against the transmission shaft and two supporting wheels for supporting the transmission shaft are mounted on the upper part of the supporting frame through bearings, and the axes of the pressing wheel and the two supporting wheels are parallel to each other and can rotate freely.

3. The dust cover testing stand for automobiles as claimed in claim 2, wherein two corresponding upright posts are formed on both sides of the upper part of the supporting frame, the riding wheel is fixed on the upper part of the supporting frame through the upright posts, wherein the upper top of one upright post is pivotally connected with one end of a trapezoidal pressing plate through a pin shaft, the other end of the pressing plate is detachably connected with the other upright post through a buckle, and the pressing wheel is fixed on the upper part of the supporting frame through being fixed in the middle of the top of the pressing plate.

4. The dust cover testing stand for automobiles as claimed in claim 3, wherein the connecting line of the three wheel centers of the pinch roller and the two supported wheels is triangular, and the relative distance between the three wheel centers is adjustable.

5. A dust cover test stand for a vehicle as claimed in claim 3, wherein: and two pairs of pipe clamps for preventing the transmission shaft from moving in the axial direction can be further arranged between the two pairs of riding wheels.

6. The dust cover testing stand for automobiles according to claim 1, wherein the transmission mechanism is provided with a transmission motor, and the transmission motor is connected with the transmission shaft to be tested through a belt.

7. A dust cover testing stand for automobiles according to claim 6, wherein said transmission mechanism is further provided with a fixing plate whose bottom is detachably fixed to the base frame, a V-shaped groove is formed in the vertical direction in the middle of the fixing plate, two idle pulleys are fixed symmetrically and detachably in the V-shaped groove, a screw shaft which can only perform rotary motion is further fixed to one side of the V-shaped groove, a tension pulley is fixed to the screw shaft through a screw nut, said transmission motor is fixed to the lower side of the fixing plate, said belt sequentially winds the transmission shaft to be tested, the tension pulley and the transmission motor output shaft, and said two idle pulleys are pressed against both sides around which the belt is wound.

8. The dust cover test bed for automobiles as claimed in claim 1, wherein the swing mechanism is divided into two swing parts symmetrically, wherein each swing part mainly comprises a swing motor, an eccentric wheel and a crank link mechanism, wherein the wheel center of the eccentric wheel is connected with the output shaft of the swing motor through a coupling, one end of the crank link mechanism is hinged with the wheel face of the eccentric wheel, and the other end of the crank link mechanism is hinged with the tested universal joint.

9. A dust cover testing stand for vehicles as claimed in claim 8, wherein said swing motor and eccentric are mounted on a base which is removably secured to the chassis.

10. A dust cover testing stand for vehicles according to claim 8, wherein a guide plate is further provided between each of said swing portions and the fixture, the guide plate being formed with a guide groove for passing the universal joint therethrough in the vertical direction, the bottom of the guide plate being detachably movably fixed to the under frame.