Fixture for performance test bench of medium-pressure common-rail oil sprayer

Abstract

The utility model provides a fixture for a performance test bench of a medium-pressure common-rail injector, which comprises an L-shaped fixture body arranged on a base plate, a fixing plate is arranged on the upper portion of the vertical portion of the fixture body, and an adjusting mechanism is arranged on the fixing plate and comprises a height adjusting assembly arranged on the fixing plate. The adjusting mechanism further comprises an angle adjusting assembly which is arranged on the fixing plate and used for adjusting the position of the oil outlet pipe connector according to the position of the oil outlet of the medium-pressure common-rail oil injector to be tested, and the angle adjusting assembly is arranged on the fixing plate and used for adjusting the height of the oil inlet pipe connector according to the height of the oil inlet of the medium-pressure common-rail oil injector to be tested. According to the utility model, the installation operation of the medium-pressure common-rail oil injectors at oil inlet positions of different heights and the installation operation of the medium-pressure common-rail oil injectors at oil outlet positions of different angles can be realized in the adjusting mechanism, so that the performance detection of the oil injectors of various different specifications can be completed by one set of fixture, and the operation is simpler and more convenient; and the applicability is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of detection fixture equipment, and particularly relates to a fixture for a medium-pressure common rail injector performance test bench. Background Technique

[0002] The medium-pressure common rail oil-boosted injector is a key component used in the fuel injection system of automobile engines. Its main working principle is to extract oil from the fuel tank through an oil boost pump and increase its pressure to a level suitable for the engine to work. Subsequently, the boosted oil is supplied to the injector through the common rail system and finally injected into the combustion chamber of the engine.

[0003] The injector includes two main parts: an injector nozzle and an injector nozzle driver. The injector nozzle consists of an injector nozzle body and a control valve. The injector nozzle body is mainly used to inject oil into the combustion chamber. The control valve is responsible for controlling the injection time and injection volume.

[0004] During operation, the injector nozzle driver controls the injection volume and injection time by receiving signals sent by the engine control unit. When an injection signal is sent, the injector nozzle driver will open the control valve to allow the oil to flow through the common rail system and be injected into the combustion chamber through the injector nozzle body. The control valve of the injector nozzle also controls the size of the injection volume according to the duration of the signal.

[0005] When the engine is running, the oil boost pump extracts oil from the fuel tank and transports it to the common rail system through a high-pressure oil pipe. The common rail system adjusts the oil pressure and performs micro-filtration to ensure a stable high-pressure oil supply for the injector nozzle.

[0006] Through the medium-pressure common rail oil-boosted injector, the engine can achieve efficient fuel injection and combustion processes, improving the fuel economy and power performance of the engine. The injector can adjust the injection volume and injection time in real time according to parameters such as engine load and speed to meet different working conditions of the engine. The working principle and performance of this injector are crucial for the reliable operation of modern automobile engines.

[0007] The medium-pressure common rail injector test bench mimics the diesel engine ECU, and at the same time provides control signals for common rail systems such as Bosch, Delphi, and Siemens to drive the medium-pressure common rail oil pump and the medium-pressure common rail injector to work. The user can set the drive signal parameters according to their actual situation and save them in groups, which is convenient for maintenance personnel to judge and repair the working state of the high-pressure common rail system.

[0008] In the process of testing the performance of medium-pressure common rail injectors, it is usually necessary to design a fixture based on the characteristics of the injector itself in order to ensure the connection with the test bench when the injector is subjected to performance testing. However, there are many types of injectors at present, and the positions of the inlet and outlet nozzles need to be adapted and designed according to the state of the engine. This results in the need to prepare a variety of fixtures with different inlet and outlet nozzle positions to meet the performance test requirements when testing the performance of injectors of different specifications, which invisibly increases unnecessary test costs and is not convenient for the subsequent unified management and storage of injector fixtures of various specifications. The use and management are both troublesome, resulting in poor applicability of the performance test bench. Utility Model Content

[0009] In view of this, the utility model provides a fixture for a medium-pressure common rail injector performance test bench, which can realize the installation operation of medium-pressure common rail injectors with different height oil inlet positions and medium-pressure common rail injectors with different angle oil outlet positions through an adjustment mechanism, so that a set of fixtures can complete the performance test of injectors of various specifications, the operation is simpler and more convenient, and the applicability is stronger. It solves the problem that in the traditional process of testing the performance of medium-pressure common rail injectors, it is usually necessary to design the fixture according to the characteristics of the injector itself, so as to ensure the connection with the test bench when the performance test of the injector is carried out, but there are many types of injectors at present, and the positions of the inlet and outlet nozzles need to be adapted and designed according to the state of the engine, which leads to the need to prepare a plurality of fixtures with different inlet and outlet nozzle positions to meet the performance test requirements when testing the performance of injectors of different specifications, which invisibly increases unnecessary test costs, is not convenient for the subsequent unified management and storage of injector fixtures of various specifications, and is more troublesome to use and manage, resulting in the problem of poor applicability of the performance test bench.

[0010] To solve the above technical problems, the utility model provides a fixture for a medium-pressure common rail injector performance test bench, which includes a fixture body arranged on a substrate. The fixture body is L-shaped. An upper part of the vertical portion of the fixture body is provided with a fixing plate, and an adjusting mechanism is arranged on the fixing plate. The adjusting mechanism includes a height adjusting component arranged on the fixing plate, which is used to adjust the height of the fuel inlet pipe joint according to the height of the fuel inlet of the medium-pressure common rail injector to be tested. The adjusting mechanism further includes an angle adjusting component arranged on the fixing plate, which is used to adjust the position of the fuel outlet pipe joint according to the position of the fuel outlet of the medium-pressure common rail injector to be tested. The utility model can realize the installation operation of the medium-pressure common rail injector with different height fuel inlet positions through the height adjusting component in the adjusting mechanism, and at the same time can realize the installation operation of the medium-pressure common rail injector with different angle fuel outlet positions through the angle adjusting component. Furthermore, it can complete the performance detection of injectors of various different specifications with a set of fixtures, the operation is simpler and more convenient, and the applicability is stronger. It solves the problem that in the process of testing the performance of medium-pressure common rail injectors, usually the fixture needs to be designed according to the characteristics of the injector itself to ensure the connection with the test bench during the performance test of the injector. However, there are many types of injectors currently, and the positions of their inlet and outlet nozzles need to be adaptively designed according to the state of the engine. This leads to the need to prepare various fixtures with different inlet and outlet nozzle positions to meet the performance test requirements when detecting the performance of injectors of different specifications, which invisibly increases unnecessary test costs and is not convenient for the subsequent unified management and storage of fixtures for various specifications of injectors. The use and management are both relatively troublesome, resulting in poor applicability of the performance test bench.

[0011] The height adjusting component includes a slide rail arranged on the upper part of the fixing plate. A first slider is slidably arranged in the slide rail. A threaded through hole adapted to the external thread of the fuel inlet pipe joint is opened on the first slider, and the fuel inlet pipe joint is threadedly connected in the threaded through hole. The utility model can realize the quick disassembly and assembly operation of the fuel inlet pipe joint through the threaded through hole on the first slider, and can slide the installed fuel inlet pipe joint up and down along the slide rail, thereby realizing the adjustment operation of the height of the fuel inlet pipe joint, facilitating the installation and connection operation of injectors with different height fuel inlets, with more convenient operation and stronger applicability.

[0012] The angle adjustment component includes a mounting plate arranged on the upper part of the slide rail. An arc-shaped adjustment through slot is formed in the mounting plate. Two pin rods are inserted into the arc-shaped adjustment through slot. A second slider is slidably arranged on the two pin rods. A threaded through hole adapted to the external thread of the oil outlet pipe joint is formed in the second slider. The oil outlet pipe joint is threadedly connected in the threaded through hole. The utility model can realize the installation operation of the oil outlet pipe joint through the threaded through hole on the second slider, and then pull the pin rod to drive the second slider to move along the arc-shaped adjustment through slot, so as to realize the connection of the injector with oil outlets at different angular positions and the performance test, and realize the performance test operation of the injector with oil outlets at a variety of different angular positions by using one fixture, with stronger applicability.

[0013] The substrate is T-shaped. The horizontal part of the substrate is arranged on the workbench of the performance test bench. A crescent-shaped through slot is formed in the upper part of the vertical part of the substrate. Positioning holes are formed in the substrate outside the crescent-shaped through slot.

[0014] A screw rod is threadedly connected to the outer side wall of the vertical part of the fixture body. The other end of the screw rod is inserted into the crescent-shaped through slot and is threadedly connected with a locking disc at the end. A positioning pin adapted to the positioning hole is also arranged on the outer side wall of the vertical part of the fixture body. The utility model can realize the adjustment operation of the inclination angle of the fixture body through the connection between the screw rod and the fixture body and the movement of the fixture body with the screw rod along the crescent-shaped through slot. After rotating to an appropriate angle, the adjusted fixture body is fixed by tightening the locking disc, which is convenient for the installation of the auxiliary connecting parts on the fixture body and the detection and inspection of the connection of each oil pipeline, without the operator having to put the body and head into the performance test bench, and the operation is more convenient and efficient.

[0015] Mounting holes are formed in the mounting plate. The mounting seat of the medium-pressure common rail injector is sleeved in the mounting holes through a connecting ring with a sealing ring. Threaded holes communicating with the mounting holes are formed in the side wall of the mounting plate. Locking nails for locking the adjusted connecting ring are threadedly connected in the threaded holes. The utility model can realize the connection and fixing operation of the corresponding injectors with different diameter specifications by preparing connecting rings with a variety of different inner diameter specifications, and can lock the adjusted connecting ring through the locking nails, and the operation is more convenient.

[0016] On the lower part of the mounting plate, on the side close to the vertical part of the fixture body, there is a support plate. At the lower part of the support plate, there are two sliding rods. A top block is slidably arranged on the outer sides of the two sliding rods. At the upper part of the top block, there is an oil collector coaxial with the mounting hole. On the outer sides of the two sliding rods below the top block, there is also a regulating slider slidably arranged. On the outer sides of the lower parts of the two sliding rods, there are respectively sleeved with first springs. The upper parts of the first springs are fixedly arranged together with the lower parts of the regulating slider. At the upper part of the regulating slider, there is a second spring. The upper part of the second spring is fixedly arranged together with the lower part of the top block. A locking rod for locking the height of the regulating slider in the adjusted position is threadedly connected to the regulating slider. The utility model can loosen the locking rod and then pull the regulating slider upward until it pushes the top block and the oil collector thereon upward to contact and hold the bottom of the fuel injector, avoiding the oil droplets dripping from the fuel injector during the performance test from falling onto the performance table, which brings a lot of inconvenience to the subsequent cleaning.

[0017] On the top block, there is a lever structure for driving the top block to move upward. The lever structure includes a limiting plate arranged on the outer side wall of the regulating slider. On the limiting plate, there is a rotating top plate. An avoidance groove is arranged on the limiting plate. A rotating shaft is arranged in the avoidance groove. The top plate is rotatably arranged on the outer side of the rotating shaft. One end of the top plate is located below the top block. The utility model can be realized by the operator pressing the top plate. The top plate rotates along the rotating shaft until it further jacks up the top block upward, greatly enhancing the fitting degree between the oil collecting tray at the upper part of the top block and the bottom of the fuel injector, greatly enhancing the sealing effect, and the operation is more convenient.

[0018] In summary, compared with the prior art, the present application includes at least one of the following beneficial technical effects:

[0019] 1. The utility model can realize the installation operation of the medium-pressure common-rail fuel injector with different height inlet positions through the height adjustment component in the adjustment mechanism, and at the same time, can realize the installation operation of the medium-pressure common-rail fuel injector with different angle outlet positions through the angle adjustment component. Furthermore, a set of fixtures can complete the performance detection of various different specifications of fuel injectors, the operation is simpler and more convenient, and the applicability is stronger. It solves the problem that in the process of testing the performance of the medium-pressure common-rail fuel injector traditionally, it is usually necessary to design fixtures according to the characteristics of the fuel injector itself to ensure the connection with the test bench during the performance test of the fuel injector. However, there are many types of current fuel injectors, and the positions of their inlet and outlet nozzles need to be adaptively designed according to the state of the engine. This leads to the need to prepare a variety of fixtures with different inlet and outlet nozzle positions to meet the performance test requirements when detecting the performance of different specifications of fuel injectors, increasing unnecessary test costs invisibly, and it is not convenient for the subsequent unified management and storage of various specifications of fuel injector fixtures. The use and management are both relatively troublesome, resulting in poor applicability of the performance test bench.

[0020] 2. The utility model can realize the quick disassembly and assembly of the fuel inlet pipe joint through the threaded through hole on the first slider, and can slide the installed fuel inlet pipe joint up and down along the slide rail, so as to realize the adjustment operation of the height of the fuel inlet pipe joint, which is convenient for adapting to the installation and connection operations of injectors with different height fuel inlets, and the operation is more convenient and the applicability is stronger.

[0021] 3. The utility model can realize the installation of the fuel outlet pipe joint through the threaded through hole on the second slider, and then move the second slider along the arc-shaped adjustment through groove by pulling the pin rod, so as to realize the connection and performance test of injectors with fuel outlet ports at different angular positions, and realize the performance test operation of injectors with fuel outlet ports at a variety of different angular positions with one fixture, and the applicability is stronger.

[0022] 4. The utility model can loosen the locking rod, and then pull the adjustment slider upward until the push block and the oil collector thereon push upward to contact and hold the bottom of the injector, so as to avoid the oil droplets dripped by the injector falling onto the performance table during the performance test, which brings a lot of inconvenience to the subsequent cleaning. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of the fixture for the performance test bench of the common rail injector in the utility model;

[0024] Figure 2 It is the Figure 1 enlarged view of the structure at A in the utility model;

[0025] Figure 3 It is the Figure 1 enlarged view of the structure at B in the utility model;

[0026] Figure 4 It is the front view of the fixture for the performance test bench of the common rail injector in the utility model.

[0027] Description of the reference numerals: 100, base plate; 200, fixture body; 300, fixed plate; 400, adjustment mechanism; 410, height adjustment assembly; 411, slide rail; 412, first slider; 420, angle adjustment assembly; 421, mounting plate; 422, arc-shaped adjustment through groove; 423, pin rod; 424, second slider; 500, crescent through groove; 501, positioning hole; 502, screw; 503, locking disc; 504, positioning pin; 600, support plate; 601, slide bar; 602, push block; 603, oil collector; 604, adjustment slider; 605, first spring; 606, second spring; 607, locking rod; 700, lever structure; 701, limiting plate; 702, top plate. Detailed Embodiment

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will combine the accompanying drawings of the embodiments of the present utility model Figures 1-4 to clearly and completely describe the technical solutions of the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all the embodiments. Based on the described embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present utility model.

[0029] As Figures 1-4 shown: This embodiment provides a fixture for a medium-pressure common rail injector performance test bench, including a fixture body 200 arranged on a substrate 100. The fixture body 200 is L-shaped. An upper part of the vertical portion of the fixture body 200 is provided with a fixing plate 300, and an adjusting mechanism 400 is arranged on the fixing plate 300. The adjusting mechanism 400 includes a height adjusting assembly 410 arranged on the fixing plate 300 for adjusting the height of an inlet pipe joint according to the height of the inlet of the medium-pressure common rail injector to be tested. The adjusting mechanism 400 further includes an angle adjusting assembly 420 arranged on the fixing plate 300 for adjusting the position of an outlet pipe joint according to the position of the outlet of the medium-pressure common rail injector to be tested. The present utility model can realize the installation operation of medium-pressure common rail injectors with different inlet heights through the height adjusting assembly 410 in the adjusting mechanism 400, and at the same time, can realize the installation operation of medium-pressure common rail injectors with different outlet angles through the angle adjusting assembly 420. Furthermore, it can complete the performance detection of injectors of various different specifications with a set of fixtures, with simpler and more convenient operation and stronger applicability. It solves the problem that in the process of testing the performance of medium-pressure common rail injectors conventionally, it is usually necessary to design fixtures according to the characteristics of the injector itself to ensure the connection with the test bench during the performance test of the injector. However, there are currently many types of injectors, and the positions of their inlet and outlet nozzles need to be adaptively designed according to the state of the engine. This leads to the need to prepare multiple fixtures with different inlet and outlet nozzle positions to meet the performance test requirements when detecting the performance of injectors of different specifications, increasing unnecessary test costs invisibly, and also being inconvenient for the subsequent unified management and storage of fixtures for various specifications of injectors. The use and management are both relatively troublesome, resulting in poor applicability of the performance test bench.

[0030] According to an embodiment of the present utility model, as Figures 1-4As shown, the height adjustment assembly 410 includes a slide rail 411 disposed on the upper portion of the fixed plate 300. A first slider 412 is slidably disposed within the slide rail 411. A threaded through hole adapted to the external thread of the oil inlet pipe joint is formed in the first slider 412. The oil inlet pipe joint is threadedly connected within the threaded through hole. In the present utility model, the quick disassembly and assembly operation of the oil inlet pipe joint can be achieved through the threaded through hole in the first slider 412, and the installed oil inlet pipe joint can be slid up and down along the slide rail 411, thereby achieving the height adjustment operation of the oil inlet pipe joint, facilitating the installation and connection operation of fuel injectors with different height oil inlets, with more convenient operation and stronger applicability.

[0031] According to another embodiment of the present utility model, as Figure 1 and Figure 2 shown, the angle adjustment assembly 420 includes a mounting plate 421 disposed on the upper portion of the slide rail 411. An arc-shaped adjustment through slot 422 is formed in the mounting plate 421. Two pin rods 423 are inserted within the arc-shaped adjustment through slot 422. A second slider 424 is slidably disposed on the two pin rods 423. A threaded through hole adapted to the external thread of the oil outlet pipe joint is formed in the second slider 424. The oil outlet pipe joint is threadedly connected within the threaded through hole. In the present utility model, the installation operation of the oil outlet pipe joint can be achieved through the threaded through hole in the second slider 424, and then by pulling the pin rods 423 to drive the second slider 424 to move along the arc-shaped adjustment through slot 422, the connection and performance test of fuel injectors with oil outlets at different angular positions are realized, achieving the performance test operation of fuel injectors with oil outlets at a variety of different angular positions with one fixture, and having stronger applicability.

[0032] According to another embodiment of the present utility model, as Figure 1 、 Figure 2 and Figure 3 shown, the substrate 100 is T-shaped. The horizontal portion of the substrate 100 is disposed on the workbench of the performance test bench. A crescent-shaped through slot 500 is formed in the upper portion of the vertical portion of the substrate 100. Positioning holes 501 are formed in the substrate 100 outside the crescent-shaped through slot 500.

[0033] A screw rod 502 is threadedly connected to the outer side wall of the vertical portion of the fixture body 200. The other end of the screw rod 502 is inserted into the crescent-shaped through groove 500, and a locking disc 503 is threadedly connected to the end portion. A positioning pin 504 adapted to the positioning hole 501 is also provided on the outer side wall of the vertical portion of the fixture body 200. In the present utility model, through the connection between the screw rod 502 and the fixture body 200, and the fixture body 200 driving the screw rod 502 to move along the crescent-shaped through groove 500, after rotating to an appropriate angle, the fixture body 200 with adjusted position is fixed by tightening the locking disc 503, realizing the adjustment operation of the inclination angle of the fixture body 200, facilitating the installation of the auxiliary connecting piece on the fixture body 200 and the detection and inspection of the connection of each oil pipeline. There is no need for the operator to put the body and head into the performance test bench, and the operation is more convenient and efficient.

[0034] Installation holes are formed in the mounting plate 421. The mounting seat of the medium-pressure common rail injector is sleeved in the installation holes through a connecting ring with a sealing ring. Threaded holes communicating with the installation holes are formed in the side wall of the mounting plate 421, and locking nails for locking the connecting ring sleeve with adjusted position are threadedly connected in the threaded holes. In the present utility model, the connection and fixing operation of injectors with corresponding different diameter specifications can be realized by preparing a variety of connecting ring sleeves with different inner diameter specifications, and the connecting ring sleeve with adjusted position can be locked by the locking nails, and the operation is more convenient.

[0035] According to another embodiment of the present utility model, as Figure 1 and Figure 3 shown, a support plate 600 is provided on the lower part of the mounting plate 421 near the vertical portion of the fixture body 200. Two sliding rods 601 are provided at the lower part of the support plate 600. A top block 602 is slidably arranged on the outer sides of the two sliding rods 601. An oil collector 603 coaxial with the installation hole is arranged at the upper part of the top block 602. An adjusting slider 604 is also slidably arranged on the outer sides of the two sliding rods 601 below the top block 602. First springs 605 are respectively sleeved on the lower outer sides of the two sliding rods 601. The upper parts of the first springs 605 are fixedly arranged together with the lower part of the adjusting slider 604. A second spring 606 is arranged at the upper part of the adjusting slider 604. The upper part of the second spring 606 is fixedly arranged together with the lower part of the top block 602. A locking rod 607 for locking the height of the adjusting slider 604 with adjusted position is threadedly connected to the adjusting slider 604. In the present utility model, by loosening the locking rod 607, and then pulling the adjusting slider 604 upward to push the top block 602 and the oil collector 603 thereon upward to contact and receive the bottom of the injector, it is avoided that the oil drops dripping from the injector during the performance test fall onto the performance bench, bringing a lot of inconvenience to the subsequent cleaning.

[0036] According to another embodiment of the present utility model, asFigure 1 and Figure 4 As shown in Figure 4 , a lever structure 700 for driving the top block 602 to move upward is provided on the top block 602. The lever structure 700 includes a limiting plate 701 provided on the outer side wall of the adjusting slider 604. A top plate 702 is rotatably provided on the limiting plate 701. An avoidance groove is provided on the limiting plate 701, and a rotating shaft is provided in the avoidance groove. The top plate 702 is rotatably provided on the outer side of the rotating shaft. One end of the top plate 702 is located below the top block 602. In the present invention, the operator can press the top plate 702, and the top plate 702 rotates along the rotating shaft to further jack up the top block 602 upward, greatly enhancing the fitting degree between the oil collecting tray on the upper part of the top block 602 and the bottom of the fuel injector, greatly enhancing the sealing effect, and making the operation more convenient.

[0037] The using method of the present invention:

[0038] First of all, it should be clear that the fixture involved in the present utility model is mainly used for installing and fixing an injector on a performance test bench of the injector, so as to achieve the purpose of performance detection. Taking the detection of a medium-pressure common-rail injector as an example, the usage method of the present utility model is elaborated in detail. It should be noted here that for a medium-pressure common-rail injector, a connecting sleeve with an outer diameter adapted to the installation hole or installation groove of the fixture needs to be prepared according to its different models, and the oil pipe joint is a common part. When performing performance detection operations on a medium-pressure common-rail injector, first, the positions on the first slider 412 and the second slider 424 need to be adjusted according to the positions of the inlet and outlet ports of the medium-pressure common-rail injector. The specific adjustment method is as follows: thread the inlet oil pipe joint into the threaded hole on the first slider 412, and then pull the axis of the inlet oil pipe joint on the first slider 412 to move along the slide rail 411 to a position where it coincides with the axis of the inlet port of the medium-pressure common-rail injector. Then, connect one end of the inlet oil pipe joint to the inlet port of the medium-pressure common-rail injector and the other end to the outlet of the inlet oil pipeline. Then, thread the outlet oil pipe joint into the threaded hole on the second slider 424, and pull the pin rod 423 to drive the second slider 424 to move along the arc-shaped adjustment through slot 422 until the axis of the outlet oil pipe joint coincides with the axis of the outlet port of the medium-pressure common-rail injector. Then, connect one end of the outlet oil pipe joint to the medium-pressure common-rail injector and the other end to the inlet of the outlet oil pipeline. Then, loosen the locking rod 607, and pull the adjustment slider 604 upward to push the top block 602 and the oil collector 603 thereon upward to contact the bottom of the injector. Then, press the top plate 702, and the top plate 702 rotates along the rotating shaft to further push the top block 602 upward, greatly enhancing the adhesion between the oil collecting tray above the top block 602 and the bottom of the injector, and greatly enhancing the sealing effect. Then, the performance test operation of the medium-pressure common-rail injector can be carried out. The present utility model can realize the installation operation of medium-pressure common-rail injectors with different heights of inlet port positions through the height adjustment component 410 in the adjustment mechanism 400, and at the same time, can realize the installation operation of medium-pressure common-rail injectors with different angles of outlet port positions through the angle adjustment component 420. Furthermore, a set of fixtures can complete the performance detection of various injectors with different specifications, the operation is simpler and more convenient, and the applicability is stronger, solving the problem that in the process of testing the performance of medium-pressure common-rail injectors traditionally, it is usually necessary to design fixtures according to the characteristics of the injector itself to ensure the connection with the test bench during the performance test of the injector. However, there are currently many models of injectors, and the positions of their inlet and outlet nozzles need to be adaptively designed according to the state of the engine. This leads to the need to prepare various fixtures with different inlet and outlet nozzle positions to meet the performance test requirements when detecting the performance of injectors with different specifications, increasing unnecessary test costs invisibly, and it is not convenient for the subsequent unified management and storage of fixtures for various specifications of injectors. The use and management are both relatively troublesome, resulting in poor applicability of the performance test bench.

[0039] In addition, it should be noted that in the description of the present utility model, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] The above is the preferred embodiment of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A fixture for a medium-pressure common-rail injector performance test bench, including a fixture body (200) arranged on a substrate (100), characterized in that: The fixture body (200) is L-shaped. An upper part of the vertical portion of the fixture body (200) is provided with a fixing plate (300). An adjusting mechanism (400) is provided on the fixing plate (300). The adjusting mechanism (400) includes a height adjusting component (410) provided on the fixing plate (300) for adjusting the height of the fuel inlet pipe joint according to the height of the fuel inlet of the medium-pressure common rail injector to be tested. The adjusting mechanism (400) further includes an angle adjusting component (420) provided on the fixing plate (300) for adjusting the position of the fuel outlet pipe joint according to the position of the fuel outlet of the medium-pressure common rail injector to be tested.

2. The fixture for the medium-pressure common rail injector performance test bench according to claim 1, characterized in that: The height adjusting component (410) includes a slide rail (411) provided on the upper part of the fixing plate (300). A first slider (412) is slidably arranged in the slide rail (411). A threaded through hole adapted to the external thread of the fuel inlet pipe joint is formed in the first slider (412). The fuel inlet pipe joint is threadedly connected in the threaded through hole.

3. The fixture for the medium-pressure common rail injector performance test bench according to claim 2, wherein: The angle adjusting component (420) includes a mounting plate (421) provided on the upper part of the slide rail (411). An arc-shaped adjusting through slot (422) is formed in the mounting plate (421). Two pin rods (423) are inserted in the arc-shaped adjusting through slot (422). A second slider (424) is slidably arranged on the two pin rods (423). A threaded through hole adapted to the external thread of the fuel outlet pipe joint is formed in the second slider (424). The fuel outlet pipe joint is threadedly connected in the threaded through hole.

4. The fixture for the medium-pressure common-rail injector performance test bench according to claim 3, characterized in that: The substrate (100) is T-shaped. The horizontal portion of the substrate (100) is arranged on the working table of the performance test bench. A crescent-shaped through slot (500) is formed in an upper part of the vertical portion of the substrate (100). A positioning hole (501) is formed in the substrate (100) outside the crescent-shaped through slot (500).

5. The fixture for the medium-pressure common rail injector performance test bench according to claim 4, characterized in that: A screw rod (502) is threadedly connected to an outer side wall of the vertical portion of the fixture body (200). The other end of the screw rod (502) is inserted into the crescent-shaped through slot (500), and a locking disc (503) is threadedly connected to the end. A positioning pin (504) adapted to the positioning hole (501) is further provided on the outer side wall of the vertical portion of the fixture body (200).

6. The fixture for the medium-pressure common-rail injector performance test bench according to claim 5, characterized in that: Mounting holes are formed in the mounting plate (421). The mounting seat of the medium-pressure common rail injector is sleeved in the mounting holes through a connecting ring with a sealing ring. A threaded hole communicating with the mounting holes is formed in a side wall of the mounting plate (421). A locking nail for locking the adjusted connecting ring is threadedly connected in the threaded hole.

7. The fixture for the medium-pressure common rail injector performance test bench according to claim 6, characterized in that: On the lower part of the mounting plate (421), on the side close to the vertical part of the fixture body (200), there is a support plate (600). On the lower part of the support plate (600), there are two sliding rods (601). A top block (602) is slidably arranged on the outer sides of the two sliding rods (601). On the upper part of the top block (602), there is an oil collector (603) coaxial with the mounting hole. An adjusting slider (604) is also slidably arranged on the outer sides of the two sliding rods (601) below the top block (602). On the outer sides of the lower parts of the two sliding rods (601), first springs (605) are respectively sleeved. The upper parts of the first springs (605) are fixedly arranged together with the lower parts of the adjusting slider (604). On the upper part of the adjusting slider (604), there is a second spring (606). The upper part of the second spring (606) is fixedly arranged together with the lower part of the top block (602). A locking rod (607) for locking the height of the adjusted adjusting slider (604) is threadedly connected to the adjusting slider (604).

8. The fixture for the medium-pressure common rail injector performance test bench according to claim 7, characterized in that: On the top block (602), there is a lever structure (700) for driving the top block (602) to move upward. The lever structure (700) includes a limiting plate (701) arranged on the outer side wall of the adjusting slider (604). A top plate (702) is rotatably arranged on the limiting plate (701). One end of the top plate (702) is located below the top block (602).

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