Force sensor fixing support

Abstract

The utility model discloses a force sensor fixing support which comprises a connector, a sleeve and a detection component arranged on the sleeve and used for detecting force signals of fuel oil injected by a nozzle of an oil injector, and an adjusting mechanism is arranged between the connector and the sleeve for connection and used for adjusting the position of the detection component at the nozzle of the injector. The adjusting mechanism can realize three adjustable degrees of freedom to ensure that a detection part and an ejector nozzle are centered in a three-dimensional space, so that the detection part is adjusted to be optimal and appropriate, all fuel at an outlet of the nozzle is captured by the detection part, and the accuracy of a test result is improved.

Description

Technical Field

[0001] The present application relates to the technical field of injector fuel injection characteristic testing, and in particular to a force sensor fixing bracket. Background Art

[0002] As the core component of the engine, the fuel injection characteristics of the injector directly affect the power, economy and emission characteristics of the entire engine. For measuring the injection characteristics of each hole of a multi-hole injector, the impulse method is a highly accurate and reliable test method. It uses a force sensor to measure the force signal at the fuel outlet, and then obtains the fuel injection characteristics through a series of conversions.

[0003] Since the axis alignment between the sensor and the injector nozzle and the distance between the two will have a certain impact on the test results and lead to inaccurate test results, the installation method of the sensor is particularly important in this process. Utility Model Content

[0004] This application provides a force sensor fixing bracket to solve the above-mentioned technical problem of inaccurate test results, using the following technical solutions:

[0005] The force sensor fixing bracket includes a connector and a sleeve, and a detection component arranged at the end of the sleeve. The detection component is used to detect the force signal of the injector nozzle injecting fuel. An adjustment mechanism is provided between the connector and the sleeve for adjusting the position of the detection component at the injector nozzle.

[0006] Preferably, the adjustment mechanism includes the first adjustment part for adjusting the distance between the detection component and the injector nozzle, and the second adjustment part provided between the first adjustment part and the connecting head, the second adjustment part is used to adjust the angle of the sleeve, and the first adjustment part is provided with a third adjustment part connected to the sleeve.

[0007] Preferably, the first adjusting part includes a connecting rod and a connecting sleeve, one end of the connecting rod is provided with a screw rod 1, the connecting sleeve is a hollow structure, the screw rod 1 is threadedly connected to one end of the connecting sleeve, and the connecting head is rotatably connected to one end of the connecting rod.

[0008] Preferably, the second adjusting portion includes an adjusting rod, a sliding groove is provided on the adjusting rod, one end of the adjusting rod is rotatably connected to the connecting head, and the first adjusting portion is connected to the sliding groove via a locking component.

[0009] Further preferably, the third adjusting portion includes a second screw, the second screw is provided on the connecting sleeve, the sleeve is threadedly connected to the second screw, and can adjust the position along the axial direction of the second screw.

[0010] Further preferably, an inclination angle a is provided between the second axis of the screw and the axis of the connecting sleeve.

[0011] Further preferably, the inclination angle a is 90°≤a≤180°.

[0012] Preferably, the screw rod 1 and the screw rod are respectively provided with fasteners for limiting the movement of the connecting sleeve and the sleeve.

[0013] Preferably, the detection component includes a piezoelectric sensor and a target plate connected to the end of the sleeve in sequence.

[0014] The beneficial effects of this application are:

[0015] An adjustment mechanism is provided between the connector and the sleeve to adjust the position of the detection component at one end of the sleeve. The adjustment mechanism includes a first adjustment portion for adjusting the horizontal distance between the detection component and the injector nozzle, and a second adjustment portion for adjusting the angle of the detection component. A third adjustment portion is provided on the first adjustment portion. The adjustment mechanism can achieve three adjustable degrees of freedom to ensure that the detection component and the injector nozzle are aligned in three-dimensional space, adjust the detection component to the optimal position, ensure that all fuel at the nozzle outlet is captured by the detection component, and make the measured results more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of this application;

[0017] Figure 2 It is a schematic diagram of the connecting sleeve structure of this application.

[0018] In the picture:

[0019] 1. Connector;

[0020] 2. First adjusting portion, 21. Connecting rod, 211. Screw rod 1, 22. Connecting sleeve, 221. Screw rod 2;

[0021] 3. Second adjustment portion, 31. Adjustment rod, 32. Slide groove;

[0022] 4. Sleeve, 5. Detection component, 51. Piezoelectric sensor, 52. Target plate;

[0023] 6. Fasteners, 7. Locking parts. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described in this application are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0025] See Figure 1 , further explaining this application, the force sensor fixing bracket includes a connector 1 and a sleeve 4, and a detection component 5 provided at the end of the sleeve 4, which is used to detect the force signal (impact force) of the fuel ejected from the injector nozzle, wherein the detection component 5 includes a piezoelectric sensor 51 and a target plate 52 connected in sequence to the end of the sleeve 4, the fuel ejected from the injector nozzle impacts the target plate 52, and the piezoelectric sensor 51 is used to detect the impact force acting on the target plate 52; the connector 1 is used to connect to the outside for fixation, and an adjustment mechanism is provided between the connector 1 and the sleeve 4 for adjusting the position of the detection component 5 at the injector nozzle, so that the detection component 5 can be adjusted to the optimal position to detect the fuel ejected from the injector nozzle to ensure the accuracy of the test results.

[0026] The adjustment mechanism includes a first adjustment portion 2, a second adjustment portion 3, and a third adjustment portion provided on the first adjustment portion for connecting the sleeve. The first adjustment portion 2 is used to adjust the distance between the detection component 5 and the connector 1, that is, it can adjust the distance between the detection component 5 and the injector nozzle in the horizontal direction ( Figure 1 Specifically, the first adjusting portion 2 includes a connecting rod 21 and a connecting sleeve 22, one end of the connecting rod 21 is provided with a screw 211, the connecting sleeve 22 is a hollow structure, the screw 211 is threadedly connected to one end of the connecting sleeve 22, and the connector 1 is rotatably connected to one end of the connecting rod 21.

[0027] The second adjustment part 3 is arranged between the first adjustment part 2 and the connecting head 1, and is used to connect the first adjustment part 2 and the connecting head 1. The second adjustment part 3 can adjust the angle of the sleeve 4; specifically, the second adjustment part 3 includes an adjustment rod 31, and a slide groove 32 is provided on the adjustment rod 31. One end of the adjustment rod 31 is rotatably connected to the connecting head 1. The first adjustment part 2 is connected to the slide groove 32 through a locking component 7. The locking component 7 moves the adjustment position along the slide groove 32, thereby adjusting the angular position of the detection component 5. After adjusting to a suitable angle, it is locked by the locking component 7, wherein the locking component 7 can be a bolt or a screw, etc.; the length of the slide groove 32 is used to determine the angle adjustment range of the detection component 5.

[0028] The third adjusting portion includes a second screw 221, the second screw 221 is provided on the connecting sleeve 22, and the sleeve 4 is sleeved on the second screw 221, wherein the second screw 221 and the sleeve 4 are connected by a thread, and the sleeve 4 can move along the axis direction of the second screw 221 ( Figure 1 The first adjusting portion 2, the second adjusting portion 3 and the third adjusting portion cooperate with each other to adjust the detection component 5 on the sleeve 4 to the optimal measurement position. There are three degrees of freedom for adjustment to improve the accuracy of the test results.

[0029] For example, in the prior art with patent number 202210376127.8, the position of the detection component 5 is fixed, and its flexibility and versatility are poor. When the position of the injector nozzle changes, the position of the detection component 5 and the injector nozzle will shift, which will cause inaccurate test results. Compared with the prior art, the present application has three adjustable degrees of freedom to ensure that the detection component 5 and the injector nozzle are aligned in three-dimensional space, so that the detection component 5 can be adjusted to the optimal position, ensuring that all fuel at the injector nozzle outlet can be captured by the detection component 5, so as to improve the accuracy of the test.

[0030] Combine Figure 1 and Figure 2 , the screw rod 211 is threadedly connected to one end of the connecting sleeve 22; the screw rod 211 is provided with a fastener 6 for limiting the movement of the connecting sleeve 22 on the screw rod 211, wherein the fastener 6 can be a nut, and there are two fasteners 6. The fasteners 6 are provided on the screw rod 211 and are located on both sides of the end of the connecting sleeve 22, and can adjust the distance that the screw rod 211 extends into the connecting sleeve 22. After the adjustment is completed, the fasteners 6 respectively clamp the ends of the connecting sleeve 22 to fix the screw rod 211 and the connecting sleeve 22 to prevent loosening.

[0031] The sleeve 4 is threadedly connected to the second screw 221, and the sleeve 4 can move along the axial direction of the second screw 221 to adjust the distance between the detection component 5 and the injector nozzle; wherein, the fastener can be provided on the second screw 221 for locking to prevent the sleeve 4 from loosening and moving along the axial direction of the second screw 221; an inclination angle a is provided between the axis of the second screw 221 and the axis of the connecting sleeve 22, and the inclination angle a can be 90°≤a≤180°, preferably, the inclination angle is 120°, so that the detection component 5 can better detect the fuel sprayed from the injector nozzle.

[0032] When in use, first fix the connector 1 to fix the whole, and adjust the first adjustment part 2 and the second adjustment part 3, as well as the position of the sleeve 4 on the first adjustment part 2, to adjust the detection component 5 to a suitable position to ensure that all the fuel at the injector nozzle outlet can be captured by the detection component 5, thereby accurately detecting the fuel injected by the injector nozzle.

Claims

1. A force sensor fixing bracket, characterized in that: It includes a connector and a sleeve, and a detection component arranged on the sleeve, wherein the detection component is used to detect the force signal of the injector nozzle spraying fuel, and an adjustment mechanism is provided between the connector and the sleeve to adjust the position of the detection component at the injector nozzle.

2. The force sensor fixing bracket according to claim 1, characterized in that: The adjustment mechanism includes a first adjustment part for adjusting the distance between the detection component and the injector nozzle, and a second adjustment part provided between the first adjustment part and the connecting head, the second adjustment part is used to adjust the angle of the sleeve, and the first adjustment part is provided with a third adjustment part connected to the sleeve.

3. The force sensor fixing bracket according to claim 2, characterized in that: The first adjusting part includes a connecting rod and a connecting sleeve. A screw rod 1 is provided at one end of the connecting rod. The connecting sleeve is a hollow structure. The screw rod 1 is threadedly connected to one end of the connecting sleeve. The connecting head is rotatably connected to one end of the connecting rod.

4. The force sensor fixing bracket according to claim 2, characterized in that: The second adjusting part comprises an adjusting rod, a sliding groove is arranged on the adjusting rod, one end of the adjusting rod is rotatably connected to the connecting head, and the first adjusting part is connected to the sliding groove via a locking component.

5. The force sensor fixing bracket according to claim 3, characterized in that: The third adjusting part comprises a second screw rod, the second screw rod is arranged on the connecting sleeve, the sleeve is threadedly connected to the second screw rod, and the position can be adjusted along the axial direction of the second screw rod.

6. The force sensor fixing bracket according to claim 5, characterized in that: An inclination angle a is provided between the second axis of the screw and the axis of the connecting sleeve.

7. The force sensor fixing bracket according to claim 6, characterized in that: The inclination angle a is 90°≤a≤180°.

8. The force sensor fixing bracket according to claim 5, characterized in that: The screw rod 1 and the screw rod 2 are respectively provided with fasteners for limiting the movement of the connecting sleeve and the sleeve.

9. The force sensor fixing bracket according to any one of claims 1 to 8, characterized in that: The detection component includes a piezoelectric sensor and a target plate which are sequentially connected to the end of the sleeve.

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