CN212030852U - Airtight test bed for oil-lubricated pulley hub of heavy truck axle - Google Patents
Airtight test bed for oil-lubricated pulley hub of heavy truck axle Download PDFInfo
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- CN212030852U CN212030852U CN202021027792.9U CN202021027792U CN212030852U CN 212030852 U CN212030852 U CN 212030852U CN 202021027792 U CN202021027792 U CN 202021027792U CN 212030852 U CN212030852 U CN 212030852U
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Abstract
The utility model discloses an airtight test bed for an oil-lubricated wheel hub of a heavy truck axle, which comprises a test bed for carrying out airtight test on the wheel hub and a control box for controlling the whole machine; the test bed comprises a supporting platform and a pressing mechanism which is arranged above the supporting platform in a lifting way; a positioning guide mechanism is arranged on the supporting platform; the pressing mechanism comprises a lifting seat and an upper pressing plate arranged below the lifting seat; the positioning guide mechanism comprises a lower pressing plate fixed with the supporting platform through a fastening bolt, and a positioning boss arranged in the center of the lower pressing plate and matched with the inner ring of the lower end face of the hub to be tested; a pressure sensing device is arranged on the positioning boss; the pressure sensing device is in communication connection with the control box through a signal line; the utility model discloses an airtight test bench of axle lubricated pulley hub of heavily blocking, convenient operation, testing result is more directly perceived, has improved gas tightness detection efficiency.
Description
Technical Field
The utility model relates to an airtight test bench has and relates to an airtight test bench of heavy truck axle lubricated pulley hub belongs to wheel hub airtight test equipment technical field.
Background
The air tightness of the wheel hub is an important index of the performance of the wheel hub of the oil lubrication structure of the heavy truck axle. The detection methods commonly used include helium gas density detection and water gas density detection. The helium gas detection requires the use of an inert gas-helium gas and helium mass spectrometer. The detection equipment is expensive, the helium loss is large, and the overall cost is high; the detection principle is that during detection, a hub needs to be placed in a closed space, the inner cavity of the hub is vacuumized, when the vacuum value is small enough, helium with a certain pressure value is filled into the outer side of the hub, and if a leak point exists on a rim of the hub, helium molecules pass through the leak point and reach the inner cavity of the hub; because the inner cavity of the hub is in a vacuum environment, the entering helium molecules can be pumped into a helium mass spectrometer, and the helium molecules are detected by the helium mass spectrometer to obtain the number of the helium molecules, so that whether the air tightness of the hub is within an acceptable range is judged. The principle of water vapor seal detection is that the inner side and the outer side of a hub are sealed during detection, the hub is immersed in water, then compressed air with certain pressure is filled into the inner cavity of the hub, if the hub has an obvious leakage point, high-pressure air in the inner cavity can form bubbles in the water to overflow, and then whether the air tightness of the hub can be accepted can be judged. The water vapor density is continuously detected for a long time, the water quality is deteriorated, the water needs to be replaced, and a large amount of clean water is consumed; the detection process needs human eye observation, the appearance is easy to miss, the detection time is longer, and the whole efficiency is not high.
In addition, after the wheel hub air tightness detection is completed, wheel bolts need to be installed on qualified wheel hubs, at present, a special press mounting table is arranged for press mounting of the wheel bolts, but the wheel hubs qualified in air tightness detection need to be transferred and carried, so that the labor intensity of workers is increased, and the production efficiency is reduced. Therefore, in order to solve the above problems, it is necessary to design a heavy truck axle oil-lubricated wheel hub airtight test bed integrating wheel hub airtight detection and wheel bolt press-fitting.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides an airtight test bed for an oil-lubricated pulley hub of a heavy truck axle, which has the advantages of convenient operation, more visual detection result and improved airtightness detection efficiency; the air tightness detection and wheel bolt press-fitting procedures of the wheel hub can be integrated on the same tool position, and the production efficiency is effectively improved.
The utility model discloses an airtight test bed for a heavy truck axle lubricated pulley hub, which comprises a test bed for testing the airtightness of the hub and a control box for controlling the whole machine; the test bed comprises a supporting platform and a pressing mechanism which is arranged above the supporting platform in a lifting way; a positioning guide mechanism is arranged on the supporting platform;
the pressing mechanism comprises a lifting seat and an upper pressing plate arranged below the lifting seat;
the positioning guide mechanism comprises a lower pressing plate fixed with the supporting platform through a fastening bolt, and a positioning boss arranged in the center of the lower pressing plate and matched with the inner ring of the lower end face of the hub to be tested; a pressure sensing device is arranged on the positioning boss; the pressure sensing device is in communication connection with the control box through a signal line; an inflator pump is arranged in the control box; the air outlet end of the inflator pump is connected with an inflation inlet reserved on the side face of the wheel hub to be tested through an air guide tube; and the air inlet end of the inflator pump is connected with an air source.
A support frame is fixed on one side of the support platform; a lifting cylinder is arranged below the support frame; and a piston rod of the lifting cylinder is connected with the lifting seat.
As a preferred embodiment, a pressurizing plate for compressing wheel bolts is arranged on the upper pressure plate; a plurality of positioning holes corresponding to the mounting holes of the hub are uniformly distributed on the pressurizing plate along the circumferential direction of the pressurizing plate; and a pressing block is inserted into the positioning hole.
Further, the pressing block is integrally made of a connecting part and a pressing part; the connecting part is in interference fit with the positioning hole; the pressing parts are exposed out of the positioning holes and correspond to the wheel bolts inserted into the mounting holes of the qualified wheel hubs one by one.
Further, the pressurizing plate is fixedly connected with the upper pressure plate through a fastening bolt.
As a preferred embodiment, a plurality of positioning pins matched with positioning slot holes arranged on the lower bottom surface of the hub to be tested are arranged on the periphery of the positioning boss on the surface of the lower press plate; the positioning pins correspond to the positioning groove holes of the hub to be detected one by one.
As a preferred embodiment, the joints of the upper pressure plate and the lower pressure plate with the hub to be tested are respectively provided with an O-shaped sealing ring.
Furthermore, the control box comprises an outer shell, a central processing unit arranged inside the outer shell, and a central control display screen, a main power switch, an air inlet switch, an experiment qualified indicator light and an experiment unqualified indicator light which are electrically connected with the central processing unit; the central control display screen, the main power switch, the air inlet switch, the qualified experiment indicator lamp and the unqualified experiment indicator lamp are respectively arranged on the front side of the outer shell; the inflator pump is arranged inside the outer shell and is electrically connected with the central processing unit; the side surface of the outer shell is provided with an air outlet which is communicated with the air inlet end of the inflator pump; and the top of the outer shell is provided with an air outlet communicated with the air outlet end of the inflator pump.
Further, the pressure sensing device is a pressure transmitter and is in communication connection with the central processing unit.
Compared with the prior art, the utility model discloses a heavy truck axle lubricated pulley hub airtight test platform, convenient operation, the testing result is more directly perceived, has improved gas tightness detection efficiency; still can assemble the gas tightness of wheel hub and wheel bolt pressure equipment process at same frock position, effectively improve production efficiency, reduce artifical transport intensity of labour, reduce equipment occupation space, reduce equipment input cost.
Drawings
Fig. 1 is a schematic view of the overall structure of embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of a test bed in embodiment 2 of the present invention.
Fig. 3 is a schematic view of the overall structure of embodiment 3 of the present invention.
The components in the drawings are labeled as: 1-a control box, 2-a supporting platform, 3-a pressing mechanism, 31-a lifting seat, 32-an upper pressing plate, 4-a positioning guide mechanism, 41-a lower pressing plate, 42-a positioning boss, 5-a wheel hub to be tested, 6-a pressure sensing device, 7-a signal line, 8-an air guide pipe, 9-an air charging port, 10-a supporting frame, 11-a lifting cylinder, 12-O type sealing rings, 13-an outer shell, 14-a central control display screen, 15-a main power switch, 16-an air inlet switch, 17-an experiment qualification indicating lamp, 18-an experiment disqualification indicating lamp, 19-an air inlet, 20-an air outlet, 21-a positioning pin, 22-a pressurizing plate, 24-a pressing block, 241-a connecting part and 242-a pressing part, 25-wheel bolt, 26-fastening bolt, 27-hub mounting hole and 28-positioning slotted hole.
Detailed Description
Example 1:
the heavy truck axle oil-lubricated wheel hub airtight test bed shown in fig. 1 comprises a test bed for performing airtight test on a wheel hub and a control box 1 for controlling the whole machine; the test bed comprises a supporting platform 2 and a pressing mechanism 3 which is arranged above the supporting platform 2 in a lifting way; the supporting platform 2 is provided with a positioning guide mechanism 4;
the pressing mechanism 3 comprises a lifting seat 31 and an upper pressing plate 32 arranged below the lifting seat 31;
the positioning guide mechanism 4 comprises a lower pressing plate 41 fixed with the supporting platform 2 through fastening bolts, a positioning boss 42 arranged in the center of the lower pressing plate 41 and matched with the inner ring of the lower end face of the hub 5 to be tested, and a positioning boss matched with the inner ring of the lower bottom face of the hub to be tested, so that the placement and positioning of the hub to be tested are facilitated; the positioning boss 42 is provided with a pressure sensing device 6; the pressure sensing device 6 is in communication connection with the control box 1 through a signal wire 7; an inflator (not shown) is installed inside the control box 1; the air outlet end of the inflator pump is connected with an inflation inlet 9 reserved on the side surface of the hub to be tested through an air duct 8; and the air inlet end of the inflator pump is connected with an air source.
A support frame 10 is fixed on one side of the support platform 2; a lifting cylinder 11 is arranged below the support frame 10; the piston rod of the lifting cylinder 11 is connected with the lifting seat 31.
An O-shaped sealing ring 12 is respectively installed at the joint of the upper pressing plate 32 and the lower pressing plate 41 with the hub 5 to be detected, so that the air leakage of the contact surfaces of the upper pressing plate and the lower pressing plate with the hub is avoided, the correctness of the detection result is prevented from being influenced, and the accuracy of air tightness detection is improved.
The control box 1 comprises an outer shell 13, a central processing unit (not shown) arranged inside the outer shell 13, a central control display screen 14, a main power switch 15, an air inlet switch 16, an experiment qualification indicator lamp 17 and an experiment disqualification indicator lamp 18, wherein the central processing unit is electrically connected with the central processing unit; the central control display screen 14, the main power switch 15, the air inlet switch 16, the experiment qualification indicating lamp 17 and the experiment disqualification indicating lamp 18 are respectively arranged on the front side of the outer shell 13; the inflator pump is arranged inside the outer shell 13 and is electrically connected with the central processing unit; the side surface of the outer shell 13 is provided with an air inlet 19 which is communicated with the air inlet end of the inflator pump; and the top of the outer shell 13 is provided with an air outlet 20 communicated with the air outlet end of the inflator pump.
The pressure sensing device 6 is a pressure transmitter and is in communication connection with the central processing unit.
The utility model discloses a heavy truck axle lubricated pulley hub airtight test platform, before the experiment, will detect the wheel hub to place on its location guiding mechanism's of holding down plate location boss, and utilize the lift cylinder to drive the top board of lift seat below and move towards wheel hub direction, until its lower bottom surface of top board and wheel hub upper surface laminating; then, connecting the air guide tube connected with the air outlet end of the inflator pump with an inflation port of the wheel hub to be tested; then, a main power switch and an air inlet switch on the control box are turned on, the air charging pump works, compressed air of an air source is pumped into the wheel hub to be detected, the pressure transmitter on the positioning boss detects the environmental pressure in real time, the pressure transmitter converts the detected pressure signal into a digital signal and transmits the digital signal to a central processing unit of the control box for analysis and processing, and the central processing unit controls a central control display screen to display the pressure value; after the inner cavity of the hub is filled with gas, namely the pressure value detected by the pressure transmitter reaches a set pressure range, closing the air inlet switch and carrying out an air tightness detection test; during the experiment, the pressure transmitter detects the change of the environmental pressure of the inner cavity within a period of time, converts the detected pressure signal into a digital signal and transmits the digital signal to the central processing unit of the control box for analysis and processing, and compares the digital signal with a set pressure range; if the pressure detection is unqualified, the central processing unit controls to light an experimental unqualified indicator lamp on the front side of the control box, so that whether the air tightness of the hub meets the use requirement or not is judged, the operation is convenient, the detection result is more visual, and the detection efficiency is improved.
Example 2:
the structure of the airtight test bed for the oil-lubricated wheel hub of the heavy truck axle shown in fig. 2 is basically the same as that of embodiment 1, wherein a plurality of positioning pins 21 matched with positioning slot holes 28 arranged on the lower bottom surface of the wheel hub to be tested are arranged on the surface of the lower pressure plate 41 and positioned at the periphery of the positioning boss 42; the locating pin 21 sets up the locating pin that matches in the wheel hub's that awaits measuring locating slot hole one-to-one on the holding down plate, is favorable to the wheel hub that awaits measuring to put and fix a position, and can carry on spacingly to the wheel hub that awaits measuring, effectively prevents to aerify the in-process or when carrying out the gas tightness detection experiment, and the wheel hub that awaits measuring takes place the skew and influences going on of experiment.
Example 3:
the structure of the airtight test bed for the oil-lubricated wheel hub of the heavy truck axle shown in fig. 3 is basically the same as that of embodiment 2, wherein a pressurizing plate 22 for compressing wheel bolts is mounted on the upper pressure plate 32; ten positioning holes (not shown) corresponding to the mounting holes 27 of the hub are uniformly distributed on the pressurizing plate 22 along the circumferential direction; and a pressing block 24 is inserted into the positioning hole. The pressing block 24 is integrally made of a connecting portion 241 and a press-fit portion 242; the connecting part 241 is in interference fit with the positioning hole; the pressing portions 242 are exposed outside the positioning holes and correspond to the wheel bolts 25 inserted into the mounting holes of the qualified wheel hub one by one. The pressure plate 22 is fixedly connected with the upper pressure plate 32 through the fastening bolt 26, the pressure plate can be installed on the lower side or the upper side of the upper pressure plate according to production requirements, and if the pressure plate is arranged on the lower side of the upper pressure plate, an O-shaped sealing ring needs to be additionally arranged on the lower bottom surface of the pressure plate so as to ensure the sealing performance during air tightness detection.
If the wheel hub to be detected is qualified through the air tightness detection experiment, the lifting cylinder drives the lifting seat to ascend, so that the upper pressure plate leaves the upper end face of the wheel hub to be deflated, and wheel bolts are inserted into mounting holes of the qualified wheel hub; then, the lifting cylinder drives the lifting seat to descend, so that the pressurizing plate above the upper pressure plate can move towards the direction of the wheel hub, downward pressure is applied to the wheel bolt through a pressing block arranged in a positioning hole of the pressurizing plate, the ten-axis positioning and press-mounting of the wheel bolt are realized, the working efficiency of a press-mounting process is improved, and the position of the wheel bolt after press-mounting is more accurate by arranging the positioning guide mechanism and the positioning pin, so that the problems of wheel hub tearing, bolt dislocation and the like caused by the deviation of the press-mounting position of the wheel bolt are avoided; in addition, the air tightness detection of the wheel hub and the wheel bolt press-fitting process are integrated at the same tool position, so that the production efficiency is effectively improved, the labor intensity of manual carrying is reduced, the occupied space of equipment is reduced, and the equipment investment cost is reduced.
The above-mentioned embodiment is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles of the present invention are included in the claims of the present invention.
Claims (9)
1. An air tightness test bed for an oil lubrication wheel hub of a heavy truck axle comprises a test bed for carrying out air tightness test on a wheel hub and a control box for controlling the whole machine; the method is characterized in that: the test bed comprises a supporting platform and a pressing mechanism which is arranged above the supporting platform in a lifting way; a positioning guide mechanism is arranged on the supporting platform;
the pressing mechanism comprises a lifting seat and an upper pressing plate arranged below the lifting seat;
the positioning guide mechanism comprises a lower pressing plate fixed with the supporting platform through a fastening bolt, and a positioning boss arranged in the center of the lower pressing plate and matched with the inner ring of the lower end face of the hub to be tested; a pressure sensing device is arranged on the positioning boss; the pressure sensing device is in communication connection with the control box through a signal line; an inflator pump is arranged in the control box; the air outlet end of the inflator pump is connected with an inflation inlet reserved on the side face of the wheel hub to be tested through an air guide tube; and the air inlet end of the inflator pump is connected with an air source.
2. The heavy truck axle oil-lubricated pulley hub airtight test stand of claim 1, characterized in that: a support frame is fixed on one side of the support platform; a lifting cylinder is arranged below the support frame; and a piston rod of the lifting cylinder is connected with the lifting seat.
3. The heavy truck axle oil-lubricated pulley hub airtight test stand of claim 1, characterized in that: the upper pressure plate is provided with a pressure plate for pressing wheel bolts; a plurality of positioning holes corresponding to the mounting holes of the hub are uniformly distributed on the pressurizing plate along the circumferential direction of the pressurizing plate; and a pressing block is inserted into the positioning hole.
4. The heavy truck axle oil-lubricated pulley hub airtight test stand of claim 3, characterized in that: the pressing block is integrally made of a connecting part and a pressing part; the connecting part is in interference fit with the positioning hole; the pressing parts are exposed out of the positioning holes and correspond to the wheel bolts inserted into the mounting holes of the qualified wheel hubs one by one.
5. The heavy truck axle oil-lubricated pulley hub airtight test stand of claim 3, characterized in that: the pressurizing plate is fixedly connected with the upper pressure plate through a fastening bolt.
6. The heavy truck axle oil-lubricated pulley hub airtight test stand of claim 1, characterized in that: a plurality of positioning pins matched with positioning groove holes arranged on the lower bottom surface of the hub to be tested are arranged on the periphery of the positioning boss on the surface of the lower press plate; the positioning pins correspond to the positioning groove holes of the hub to be detected one by one.
7. The heavy truck axle oil-lubricated pulley hub airtight test stand of claim 1, characterized in that: and an O-shaped sealing ring is respectively arranged at the joint of the upper pressure plate and the lower pressure plate with the hub to be tested.
8. The heavy truck axle oil-lubricated pulley hub airtight test stand of claim 1, characterized in that: the control box comprises an outer shell, a central processing unit arranged in the outer shell, a central control display screen, a main power switch, an air inlet switch, an experiment qualified indicator light and an experiment unqualified indicator light, wherein the central control display screen, the main power switch, the air inlet switch, the experiment qualified indicator light and the experiment unqualified indicator light are electrically connected with the central processing unit; the central control display screen, the main power switch, the air inlet switch, the qualified experiment indicator lamp and the unqualified experiment indicator lamp are respectively arranged on the front side of the outer shell; the inflator pump is arranged inside the outer shell and is electrically connected with the central processing unit; the side surface of the outer shell is provided with an air inlet which is communicated with the air inlet end of the inflator pump; and the top of the outer shell is provided with an air outlet communicated with the air outlet end of the inflator pump.
9. The heavy truck axle oil-lubricated pulley hub airtight test stand of claim 1, characterized in that: the pressure sensing device is a pressure transmitter and is in communication connection with the central processing unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021027792.9U CN212030852U (en) | 2020-06-08 | 2020-06-08 | Airtight test bed for oil-lubricated pulley hub of heavy truck axle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021027792.9U CN212030852U (en) | 2020-06-08 | 2020-06-08 | Airtight test bed for oil-lubricated pulley hub of heavy truck axle |
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| CN212030852U true CN212030852U (en) | 2020-11-27 |
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| CN202021027792.9U Active CN212030852U (en) | 2020-06-08 | 2020-06-08 | Airtight test bed for oil-lubricated pulley hub of heavy truck axle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113834605A (en) * | 2021-09-30 | 2021-12-24 | 浙江铂大工贸有限公司 | Physical signal air tightness detection device for automobile hub |
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2020
- 2020-06-08 CN CN202021027792.9U patent/CN212030852U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113834605A (en) * | 2021-09-30 | 2021-12-24 | 浙江铂大工贸有限公司 | Physical signal air tightness detection device for automobile hub |
| CN113834605B (en) * | 2021-09-30 | 2024-02-13 | 浙江铂大工贸有限公司 | Physical signal air tightness detection device for automobile hub |
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