CN202372321U - On-line detection equipment of oil cylinder assembly - Google Patents

Abstract

The utility model discloses an online detection device for an oil cylinder assembly, which comprises a supporting stand, on which a fixing frame for the oil cylinder assembly and a hydraulic control circuit for the oil cylinder assembly are arranged; The end of the rod is in contact with the force sensor of the top pressure, and the cone sealing quick interface device of the oil inlet and outlet of the oil cylinder assembly is connected to the support stand. The utility model proposes a new type of online detection equipment for the oil cylinder assembly, which uses a force sensor to realize the factory performance inspection of the oil cylinder assembly. The detection object is direct, there is no excessive link, the detection result is true and reliable, and the detection accuracy is improved, which meets the user's requirements for product performance. Reliability requirements, but also meet the safety performance requirements of the car cab tilting and lifting mechanism.

Description

Oil cylinder assembly online testing equipment

technical field

The utility model belongs to a detection device for auto parts, in particular to performance detection equipment for an oil cylinder assembly.

Background technique

When the car is repairing and maintaining the engine, the cab must be turned upside down. The whole process is realized by lifting the oil cylinder assembly. Therefore, if the oil cylinder assembly with functional defects enters the market, it will directly have a negative impact on the reputation and image of the company. For this reason, our company All cylinder assemblies produced must pass performance testing before leaving the factory.

Oil cylinder production generally uses traditional simulation test benches for ex-factory performance testing of oil cylinder assemblies, mainly to simulate the oil cylinder assembly in the state of the whole vehicle, and install the rear cover and piston rod joint of the oil cylinder assembly on the simulation test bench through the pin shaft , manually connect the oil circuit, supply oil to the large cavity of the cylinder assembly and pressurize the piston rod to push the load on the test bench to the top dead center, continue to press to the test pressure and then maintain the pressure, and visually observe the movement of the piston rod rising and falling during the oil supply process The pressure drop indicated by the pressure gauge connected to the large chamber of the cylinder assembly within the state and pressure holding time is used to detect the pressure resistance, internal leakage, external leakage and other factory performance of the cylinder assembly. Due to the superposition of system and observation errors, resulting in poor detection accuracy.

The traditional simulation test bench needs to manually install the back cover and piston rod of the oil cylinder assembly on the test bench through the pin shaft, and manually complete the oil circuit docking operation. The reliability of the oil circuit connection is poor, and it also affects the detection accuracy, and the operation is cumbersome. low efficiency.

With the increase in the demand for hydraulic cylinders in the automotive industry and the improvement in quality requirements, there are many problems in the detection and display accuracy of the traditional simulation test bench, detection efficiency, versatility, applicability, logistics, floor space, etc. To meet the needs of scale, automation and serialization development.

Contents of the invention

The purpose of this utility model is to provide an oil cylinder assembly online detection device that can quickly realize the automatic connection of the oil pipeline during the detection of the oil cylinder and is suitable for the detection of a series of oil cylinders, so as to solve the above problems.

The technical scheme of the utility model is: oil cylinder assembly on-line detection equipment, which includes a support stand, which is provided with a cylinder assembly fixing frame and a hydraulic control circuit of the oil cylinder assembly; The end of the piston rod is in contact with the force sensor of the top pressure, and the cone surface sealing quick interface device of the oil inlet and outlet of the oil cylinder assembly is connected to the support stand.

A support connecting block is arranged on the supporting platform, and the force sensor is fixed on the supporting connecting block. The supporting connecting block is connected with the displacement adjustment plate. The displacement adjusting plate is provided with threaded connection adjustment holes at intervals, and the support connection block is connected with the threaded connection adjustment hole. . The position of the force sensor can be adjusted, so that the device can detect oil cylinders of different lengths, and realize the versatility, applicability and serialization of the detection oil cylinders.

The cone sealing quick interface device includes a connecting block, and an oil pipe is arranged inside the connecting block, the oil outlet of the oil pipe is connected with a cone sealing quick joint, and the oil inlet of the oil pipe is arranged on the surface of the connecting block; the connecting block is connected with the moving rod, The travel rod is in contact with or connected to the drive structure. It realizes the support and automatic operation of the quick joint, and is simple and easy.

The driving structure includes an oil cylinder, the piston rod of the oil cylinder is hingedly connected to one end of the pressure rod, the pressure rod is hingedly connected to the support frame, and the other end of the pressure rod is in contact with the end of the moving rod. Adopting the hydraulic drive structure, on the one hand, the structure is simplified, and on the other hand, some components in the hydraulic control circuit, such as fuel tanks, can be used in common, saving costs.

The connecting block includes a first connecting block and a second connecting block, the first connecting block and the second connecting block are connected with the first moving rod and the second moving rod respectively, the first moving rod and the second moving rod pass through the guide block, and the first moving rod and the second moving rod pass through the guide block. The ends of the first moving rod and the second moving rod are connected with the pressing block, and the pressing block contacts or connects with the other end of the pressing rod. It can realize the quick connection of the oil inlet and outlet of the detected oil cylinder, and has a compact structure and is convenient for connection and installation.

Return springs are provided on the first moving rod and the second moving rod between the pressure block and the guide block. Spring reset is used to reduce the connection structure between the pressure block and the pressure rod, which is convenient for replacing different pressure blocks and is suitable for the detection of different oil cylinders.

The supporting connection block is provided with a moving guide groove, and the moving guide groove is stuck on the displacement adjustment plate. This structure enables the displacement adjustment plate and the supporting connection block to form a guide rail slider connection structure, which facilitates the movement and adjustment of the position of the force sensor.

A pressing head is arranged on the pressing rod, and a spherical contact surface is provided between the pressing block and the pressing head.

The pressing block is provided with a spherical groove, the pressing head has a spherical end surface, and the spherical end surface of the pressing head cooperates with the spherical groove on the pressing block.

The press-down contact structure of the spherical contact surface can avoid uniform force between the two contact surfaces when they are pressed down, avoid stress concentration, and at the same time realize relative fit adjustment between the two contact surfaces during the press-down process.

The pressing block is connected with the first connecting cap and the second connecting cap, the first connecting cap is connected with the end of the first moving rod, and the second connecting cap is connected with the end of the second moving rod. The connection structure between the connection cap and the pressure block is adopted to facilitate the installation and replacement of parts.

The utility model adopts the conical surface sealing quick interface device, which can automatically realize the quick connection of the oil inlet and outlet of the detected oil cylinder. During the detection process, the pressure block always exerts pressure on the pressure rod. , to ensure that the two sealing cones can withstand high oil pressure testing.

The new online detection equipment of the oil cylinder assembly uses the force sensor as the output carrier of the oil pressure of the oil cylinder assembly and the system signal of internal and external leakage. The small amount of leakage in the tested oil cylinder assembly is directly reflected by the digital display, and the detected value is true and reliable;

The on-line inspection equipment realizes on-line inspection, avoids logistics between assembly and performance inspection, reduces labor intensity, and effectively improves inspection efficiency.

The oil cylinder online detection equipment also has general features such as convenient card installation, adjustable stroke, pressure resistance, and pressure resistance time. The whole system is safe and controllable. It can be applied to the performance testing of various oil cylinder assembly production fields.

The utility model proposes a new type of on-line detection equipment for the oil cylinder assembly. The force sensor is used to realize the factory performance detection of the oil cylinder assembly. The detection object is direct, there is no excessive link, the detection result is true and reliable, and the detection accuracy is improved, which meets the user's requirements for product performance Reliability requirements, but also meet the safety performance requirements of the car cab tilting and lifting mechanism.

Since the cylinder online testing equipment has the stroke, testing pressure and pressure resistance time, which can be accurately set according to the type requirements of the testing cylinder assembly, it can be applied to the comprehensive performance testing of various cylinder assembly fields.

Description of drawings

Fig. 1 Schematic diagram of the structure of the online detection equipment for the cylinder assembly.

Fig. 2 Schematic diagram of the left view of the structure of the on-line inspection equipment for the oil cylinder assembly.

Fig. 3 is a schematic diagram of the structure of the cone sealing quick interface device I.

Fig. 4 Schematic diagram II of the structure of the cone sealing quick interface device.

Figure 5 is a schematic diagram of the connection between the moving guide slot card of the supporting link block and the displacement adjustment plate.

Figure 6 is a schematic diagram of the detection hydraulic control circuit.

Detailed ways

As shown in FIG. 1 , the support platform 100 is designed to have a work surface 101 according to requirements, a support frame 102 is arranged on the work surface 101 , and a support leg 103 is arranged under the work surface 101 . It can be designed as a structure capable of detecting the general name of multiple oil cylinders at the same time. In this embodiment, the support stand 100 can detect the general name of four oil cylinders at the same time, which is divided into two on one side of the support frame 102 and two on the other side (Fig. 2 shown).

Related control and operation instruments 110 for detection are connected to the support frame 102 .

The support stand 100 is provided with a cylinder assembly fixing frame 120 , and the detected oil cylinder 150 is provided on the oil cylinder assembly fixing frame 120 .

A displacement adjustment plate 160 is connected to the working surface 101 , and connection adjustment holes 161 are arranged on the displacement adjustment plate 160 at intervals.

The supporting connecting block 170 is provided with a moving guide groove 171, and the moving guiding groove 171 is stuck on the displacement adjustment plate 160 (as shown in FIG. 5 ), so that the displacement adjusting plate and the supporting connecting block form a guide rail slider connection structure. The supporting connection block 170 is connected to the displacement adjustment plate 160 through pins or bolts 172 and connection adjustment holes 161 . The force sensor 180 is fixedly connected to the supporting connection block 170 . By moving and adjusting different positions of the supporting connecting block 170, the position of the force sensor 180 can be changed, thereby realizing the detection of oil cylinders with different strokes.

The support stand 100 is connected with a cone sealing quick interface device 200 of the inlet and outlet of the oil cylinder assembly.

As shown in Figures 3 and 4, the taper sealing quick interface device 200 includes a connection block. In this embodiment, the connection block includes a first connection block 201 and a second connection block 202, which are respectively the oil inlet and outlet of the oil cylinder corresponding to the inspection. Oil port; the first connection block 201 and the second connection block 202 have the same structure, and the first connection block 201 is used for illustration: the first connection block 201 is provided with an oil pipe 203, and the oil outlet 204 of the oil pipe 203 is connected with a taper sealing quick The joint 205 and the oil inlet 206 of the oil pipe are arranged on the surface of the connection block, which realizes the connection with the external oil pipe. The cone sealing quick connector 205 is conical, and it matches the conical shape in the external oil port of the checked oil cylinder. A sealing device is provided on the cone surface.

The cone seal quick interface device 200 also includes a first moving rod 207 and a second moving rod 208 respectively connected to the first connecting block 201 and the second connecting block 202, and the first moving rod 207 and the second moving rod 208 pass through the guide The block 209, the guide block 209 is connected with the support rod 210, and the support rod 210 is fixed on the work surface 101.

The first connecting cap 211 is connected to the end of the first moving rod 207 , and the second connecting cap 212 is connected to the end of the second moving rod 208 . A pressing block 213 is connected to the first connecting cap 211 and the second connecting cap 212 . The above structure facilitates the installation of the two moving bars.

Return springs 214 and 215 are provided on the first moving rod and the second moving rod between the pressure block 213 and the guide block 209 .

The oil cylinder 220 is vertically arranged on the work surface 101, the end of the piston rod of the oil cylinder 220 is hingedly connected to one end of the pressure rod 230, the middle part of the pressure rod 230 is hingedly connected to the support rod 210, and the other end of the pressure rod 230 is provided with a pressure head 231, This forms a lever type pressing structure.

The spherical contact surface between the pressing head 231 and the pressing block 213 .

Specifically, the pressing block 213 is provided with a spherical groove 218 , the pressing head 231 has a spherical end surface 232 , and the spherical end surface of the pressing head fits into the spherical groove on the pressing block.

As shown in Figure 6, the detection hydraulic control circuit includes an oil tank 300, and connected automatic pump 301 and manual pump 302; the oil outlet pipeline of automatic pump 301 is connected with overflow safety valve 303; and connected automatic pump 301 and manual pump 302 The reversing valve 304 is connected on the oil outlet pipe of the reversing valve 304; the two oil pipes of the reversing valve 304 are connected with the external oil port of the tested oil cylinder 310 through the filter 305, that is, connected through the cone sealing quick connector 205. A hydraulic control check valve 306, a transfer valve 307 and a shut-off valve 308 are connected to the external oil pipe of the rodless chamber of the tested oil cylinder.

The performance test of the new online testing equipment for the oil cylinder assembly is to clamp the oil cylinder to the test station, use the conical surface sealing interface to quickly lock, realize the quick connection of the oil circuit, start the electric pump to pressurize the oil supply, and the piston rod moves forward. When the piston rod of the oil cylinder assembly touches the force sensor, continue to pressurize, so that the inner cavity of the oil cylinder assembly reaches the test detection pressure P1. At this time, the force sensor feels the output force F1 after the specified test pressure of the oil cylinder assembly, and maintains the pressure to the specified pressure. Finally, the force sensor senses the force F2 from the cylinder assembly to the output. At this time, the digital converter automatically calculates the pressure drop ΔP=(F1-F2)/S within the pressure holding time, and S- is input according to the type of the test cylinder assembly. Set (piston sectional area for non-differential cylinders, piston rod sectional area for differential cylinders), and directly display the values to realize various ex-factory performances such as pressure resistance, internal leakage, and external leakage of the cylinder assembly comprehensive performance testing.

During detection, because the cone seal quick connector 205 of the cone seal interface device passes through the connection block, the moving rod, and the briquetting block. The role of the lever-type pressure rod head and the oil cylinder is always in tight sealing contact with the external oil port of the tested oil cylinder to realize quick pipe connection, maintain the sealing and high pressure resistance during pressure detection.

After the detection is completed and the detection working oil pressure is completely removed, the piston rod of the oil cylinder 220 retracts, and the moving rod moves up under the action of the spring force, so that the cone seal quick joint 205 is separated from the external oil port of the tested oil cylinder, which is fast and simple. No manual operation is required.

Claims (10)

1. An oil cylinder assembly online detection device, which includes a support stand, the support stand is provided with a cylinder assembly fixing frame, and a hydraulic control circuit of the oil cylinder assembly; it is characterized in that the support stand is provided with a cylinder piston The end of the rod is in contact with the force sensor of the top pressure, and the cone surface sealing quick interface device connected with the inlet and outlet of the oil cylinder assembly is connected to the support stand. 2. The on-line detection device for the oil cylinder assembly as claimed in claim 1, wherein a support connecting block is arranged on the supporting platform, the force sensor is fixed on the supporting connecting block, and the supporting connecting block is connected with a displacement adjustment plate, and the displacement adjustment plate The upper interval is provided with a connection adjustment hole, and the support connection block is connected with the screw connection adjustment hole. 3. The on-line detection equipment for oil cylinder assembly as claimed in claim 1, wherein the cone sealing quick interface device comprises a connecting block, an oil pipe is arranged in the connecting block, the oil outlet of the oil pipe is connected with a cone sealing quick joint, and the oil pipe The oil inlet is arranged on the surface of the connecting block; the connecting block is connected with the moving rod, and the moving rod is in contact with or connected with the driving structure. 4. The on-line inspection device for the oil cylinder assembly according to claim 3, wherein the drive structure comprises an oil cylinder, the piston rod of the oil cylinder is hingedly connected to one end of the pressure rod, the pressure rod is hingedly connected to the support rod, and the other end of the pressure rod is connected to the moving rod end contact. 5. As claimed in claim 3 or 4, the cylinder assembly online detection device is characterized in that the connecting block comprises a first connecting block and a second connecting block, and the first connecting block and the second connecting block are respectively connected with the first moving rod and the The second moving rod, the first moving rod and the second moving rod pass through the guide block, the ends of the first moving rod and the second moving rod are connected with the pressing block, and the pressing block contacts or connects with the other end of the pressing rod. 6. The on-line inspection device for the oil cylinder assembly according to claim 5, characterized in that both the first moving rod and the second moving rod between the pressing block and the guiding block are provided with return springs. 7. The on-line inspection device for the oil cylinder assembly according to claim 2, characterized in that the supporting connecting block is provided with a moving guide groove, and the moving guide groove is stuck on the displacement adjustment plate. 8. The on-line inspection device for the oil cylinder assembly according to claim 5, wherein the pressure rod is provided with a pressure head, and there is a spherical contact surface between the pressure block and the pressure head. 9. The on-line testing equipment for oil cylinder assembly as claimed in claim 8, wherein the pressure block is provided with a spherical groove, the pressure head has a spherical end surface, and the spherical end surface of the pressure head is in contact with the spherical shape on the pressure block. Groove fit. 10. The on-line detection equipment for the cylinder assembly according to claim 5, 6, 8 or 9, wherein the pressure block is connected with the first connecting cap and the second connecting cap, and the first connecting cap is connected with the end of the first moving rod , the second connecting cap is connected to the end of the second moving rod.

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