Position testing fixture for threaded oil inlet hole of oil injector body

Abstract

The utility model discloses a tool for detecting the position of a threaded oil inlet hole of an oil injector body. The tool comprises a base, a floating seat and a detection bolt, a working plane and a working inclined plane are arranged on the base, a first mounting hole is formed in the working plane, the first positioning sleeve is connected to the first mounting hole, a second mounting hole is formed in the working inclined plane, and the second positioning sleeve is connected to the second mounting hole; the floating seat is in sliding fit with the first positioning sleeve, and an elastic piece is arranged between the floating seat and the base; the detection bolt is in sliding fit with the second positioning sleeve, and the detection bolt can extend out of the second positioning sleeve to a position above the working inclined plane; the first mounting hole is a stepped hole, and the first positioning sleeve is in interference fit with the small-diameter section of the first mounting hole; a bottom cover is contained in the large-diameter section of the first mounting hole and connected to the bottom of the base through a locking bolt. Compared with the prior art, the device is simple in structure and convenient to use, and can quickly detect the position of the threaded oil inlet hole, namely whether the included angle between the threaded oil inlet hole and the valve cavity is qualified or not.

Description

Technical Field

[0001] This utility model relates to the field of inspection tool technology, and in particular to an inspection tool for the position of the oil inlet hole of the injector body thread. Background Technology

[0002] Fuel injectors are precision components requiring extremely high machining accuracy. They must possess a wide dynamic flow range, strong resistance to clogging and contamination, and excellent atomization performance. The injector receives injection pulse signals from the ECU and precisely controls the fuel injection quantity. The spray characteristics of the injector include atomization particle size, fuel mist distribution, fuel jet direction, range, and diffusion cone angle. These characteristics must meet the requirements of the diesel engine combustion system to ensure optimal air-fuel mixture formation and combustion, resulting in high power and thermal efficiency.

[0003] The injector body is the main part of the injector, used to house the fuel injector nozzle and other injector components, and contains fuel passages. For example... Figure 1 As shown, a valve chamber is provided at one end of the injector body, and an inclined connector seat is provided on the outer side of the injector body. A threaded oil inlet hole for installing a transition connector is opened on the outer end face of the connector seat. After the threaded oil inlet hole is processed, it is necessary to check whether the included angle between the threaded oil inlet hole and the valve chamber is qualified.

[0004] Traditional inspection methods use coordinate measuring machines (CMMs), which are very inefficient, require highly skilled personnel, and are prone to errors. Utility Model Content

[0005] The purpose of this utility model is to provide a tool for detecting the position of the threaded oil inlet hole of an injector body. It has a simple structure and is easy to use. It can quickly detect the position of the threaded oil inlet hole, that is, whether the included angle between the threaded oil inlet hole and the valve cavity is qualified, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A tooling for locating the oil inlet hole of an injector body thread includes a base, a floating seat, and a detection bolt. The base has a working plane and a working inclined plane. The working plane has a first mounting hole, and a first positioning sleeve is connected to the first mounting hole. The working inclined plane has a second mounting hole, and a second positioning sleeve is connected to the second mounting hole. The floating seat is slidably fitted to the first positioning sleeve, and an elastic element is provided between the floating seat and the base. The detection bolt is slidably fitted to the second positioning sleeve, and the detection bolt can extend beyond the second positioning sleeve to the top of the working inclined plane.

[0008] A further improvement of this utility model is that the first mounting hole is a stepped hole, and the first positioning sleeve is interference-fitted into the small diameter section of the first mounting hole; the large diameter section of the first mounting hole contains a bottom cover, and the bottom cover is connected to the bottom of the base by a locking bolt.

[0009] A further improvement of this utility model is that the base has a threaded through hole on the side, and a limit bolt is threadedly fitted in the threaded through hole. The front end of the limit bolt is a smooth rod. The first positioning sleeve has a clearance hole, and the limit bolt passes through the clearance hole. The floating seat has a guide groove, and the smooth rod part of the limit bolt slides up and down in the guide groove.

[0010] A further improvement of this utility model is that the elastic element is a spring, the bottom end of the floating seat is provided with a receiving hole, the top end of the spring is located in the receiving hole, and the bottom end of the spring contacts the bottom cover, and the top end of the floating seat is provided with a groove.

[0011] A further improvement of this utility model is that the second mounting hole is an inclined stepped hole, and the center line of the second mounting hole is perpendicular to the working inclined surface; the second positioning sleeve is interference-fitted with the large diameter section of the second mounting hole, and the second positioning sleeve protrudes from the working inclined surface.

[0012] A further improvement of this utility model is that the front end of the detection bolt is threaded and the rear side is smooth, and the smooth part of the detection bolt is slidably fitted to the second positioning sleeve.

[0013] A further improvement of this utility model is that the base is provided with a cut surface, and the detection bolt passes through the second positioning sleeve from the cut surface.

[0014] A further improvement of this utility model is that the top of the base is provided with a threaded blind hole, and the detection bolt can be threaded into the threaded blind hole.

[0015] The beneficial effects of this utility model are:

[0016] The present invention relates to a fuel injector body thread inlet hole position gauge, which has a simple structure and is easy to use. It can quickly detect the position of the thread inlet hole, that is, whether the included angle between the thread inlet hole and the valve cavity is qualified.

[0017] This utility model provides a gauge for the position of the oil inlet hole in the injector body. The floating seat ensures that the injector body has room to move up and down, making it easy to quickly screw the test bolt into the threaded oil inlet hole during testing, thus further improving testing efficiency.

[0018] This utility model provides a gauge for the position of the oil inlet hole in the injector body thread. When the gauge is not in use, the testing bolt can be threaded into the blind hole of the thread, thus avoiding the loss of the testing bolt. Attached Figure Description

[0019] Figure 1 This is a partial cross-sectional view of the fuel injector body.

[0020] Figure 2 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 3 This is a schematic diagram of the floating seat structure of this utility model.

[0022] Figure 4 This is a schematic diagram of the detection bolt structure of this utility model.

[0023] Figure 5 This is a schematic diagram of the base structure of this utility model.

[0024] In the diagram: 1-base, 101-working plane, 102-working inclined plane, 103-threaded through hole, 104-threaded blind hole, 2-floating seat, 201-guide groove, 202-accommodating hole, 203-groove, 3-inspection bolt, 4-first positioning sleeve, 5-second positioning sleeve, 6-bottom cover, 7-spring, 8-injector body, 801-valve cavity, 802-connector seat, 803-threaded oil inlet hole, 804-bore, 9-limiting bolt, 10-locking bolt. Detailed Implementation

[0025] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0026] Example 1: As Figures 1-5 As shown, a tool for checking the position of the oil inlet hole of an injector body thread includes a base 1, a floating seat 2, and a detection bolt 3. The base 1 has a working plane 101 and a working inclined plane 102. The working plane 101 has a first mounting hole, and a first positioning sleeve 4 is connected to the first mounting hole. The working inclined plane 102 has a second mounting hole, and a second positioning sleeve 5 is connected to the second mounting hole. The floating seat 2 is slidably fitted to the first positioning sleeve 4, and an elastic element is provided between the floating seat 2 and the base 1. The detection bolt 3 is slidably fitted to the second positioning sleeve 5, and the detection bolt 3 can extend out of the second positioning sleeve 5 to above the working inclined plane 102.

[0027] The first mounting hole is a stepped hole, and the first positioning sleeve 4 is interference-fitted into the small diameter section of the first mounting hole; the large diameter section of the first mounting hole contains a bottom cover 6, and the bottom cover 6 is connected to the bottom of the base 1 by a locking bolt 10.

[0028] The base 1 has a threaded through hole 103 on its side, in which a limit bolt 9 is threadedly fitted. The front end of the limit bolt 9 is a smooth rod. The first positioning sleeve 4 has a clearance hole, through which the limit bolt 9 passes. The floating seat 2 has a guide groove 201, in which the smooth rod part of the limit bolt 9 slides up and down in the guide groove 201.

[0029] The elastic element is a spring 7. The bottom end of the floating seat 2 is provided with a receiving hole 202. The top end of the spring 7 is located in the receiving hole 202, and the bottom end of the spring 7 is in contact with the bottom cover 6. The top end of the floating seat 2 is provided with a groove 203.

[0030] The second mounting hole is an inclined stepped hole, and the center line of the second mounting hole is perpendicular to the working inclined surface 102; the second positioning sleeve 5 is interference-fitted to the large diameter section of the second mounting hole, and the second positioning sleeve 5 protrudes from the working inclined surface 102.

[0031] The front end of the test bolt 3 is threaded, and the rear side is smooth. The smooth part of the test bolt 3 is slidably fitted into the second positioning sleeve 5.

[0032] The base 1 has a cut surface, and the detection bolt 3 passes through the cut surface into the second positioning sleeve 5.

[0033] Example 2: This example is a further improvement on Example 1. The main improvement is that in Example 1, the surface of the tray 4 is smooth, resulting in low friction with the inner wall of the paper tube of the film roll 8, which poses a risk of the film roll 8 falling off. In this example, the above-mentioned defects can be avoided. Specifically:

[0034] The top of the base 1 is provided with a threaded blind hole 104, and the detection bolt 3 can be threaded into the threaded blind hole 104. In this embodiment, when the inspection tool is not in use, the detection bolt 3 can be threaded into the threaded blind hole 104 to avoid the loss of the detection bolt 3.

[0035] Apart from the above, this embodiment is exactly the same as Embodiment 1, and will not be described again here.

[0036] The specific working principle of this utility model is as follows:

[0037] Before starting work, the operator places the bottom of the injector body 8 on the floating seat 2, with the boss 804 at the bottom of the injector body 8 embedded in the groove 203 at the top of the floating seat 2. The boss 804 is concentric with the valve chamber 801. Since the inclined surface of the connector seat 802 on the injector body 8 is parallel to the upper end face of the second positioning sleeve 5, the inclined surface of the connector seat 802 on the injector body 8 will be in close contact with the upper end face of the second positioning sleeve 5. Then, the operator inserts the test bolt 3 into the second positioning sleeve 5 from the bottom of the second mounting hole with one hand, and gently presses the injector body 8 with the other hand, and turns the test bolt 3 so that it can be screwed into the threaded oil inlet hole 803. If the test bolt 3 can be smoothly screwed into the threaded oil inlet hole 803, it indicates that the position of the threaded oil inlet hole 803, i.e., the included angle between the threaded oil inlet hole 803 and the valve cavity 801, is qualified; if the test bolt 3 is stuck or cannot be smoothly screwed into the threaded oil inlet hole 803 during the screwing process, it indicates that the position of the threaded oil inlet hole 803, i.e., the included angle between the threaded oil inlet hole 803 and the valve cavity 801, is unqualified.

[0038] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent transformations or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A position gauge for the fuel inlet hole of an oil injector body, characterized in that: It includes a base (1), a floating seat (2), and a detection bolt (3); the base (1) is provided with a working plane (101) and a working inclined plane (102), the working plane (101) is provided with a first mounting hole, a first positioning sleeve (4) is connected to the first mounting hole, the working inclined plane (102) is provided with a second mounting hole, and a second positioning sleeve (5) is connected to the second mounting hole; the floating seat (2) is slidably fitted to the first positioning sleeve (4), and an elastic element is provided between the floating seat (2) and the base (1); the detection bolt (3) is slidably fitted to the second positioning sleeve (5), and the detection bolt (3) can extend from the second positioning sleeve (5) to above the working inclined plane (102).

2. The injector body thread inlet hole position gauge as described in claim 1, characterized in that: The first mounting hole is a stepped hole, and the first positioning sleeve (4) is interference-fitted to the small diameter section of the first mounting hole; the large diameter section of the first mounting hole contains a bottom cover (6), and the bottom cover (6) is connected to the bottom of the base (1) by a locking bolt (10).

3. The injector body thread inlet hole position gauge as described in claim 1 or 2, characterized in that: The base (1) has a threaded through hole (103) on its side, and a limit bolt (9) is threadedly fitted in the threaded through hole (103). The front end of the limit bolt (9) is a smooth rod. The first positioning sleeve (4) has a clearance hole, and the limit bolt (9) passes through the clearance hole. The floating seat (2) has a guide groove (201), and the smooth rod part of the limit bolt (9) slides up and down in the guide groove (201).

4. The position gauge for the fuel injection hole of the fuel injector body according to claim 2, characterized in that: The elastic element is a spring (7), the bottom end of the floating seat (2) is provided with a receiving hole (202), the top end of the spring (7) is located in the receiving hole (202), and the bottom end of the spring (7) is in contact with the bottom cover (6). The top end of the floating seat (2) is provided with a groove (203).

5. The position gauge for the fuel injection hole of the fuel injector body according to claim 1, characterized in that: The second mounting hole is an inclined stepped hole, and the center line of the second mounting hole is perpendicular to the working inclined surface (102); the second positioning sleeve (5) is interference-fitted to the large diameter section of the second mounting hole, and the second positioning sleeve (5) protrudes from the working inclined surface (102).

6. The injector body thread inlet hole position gauge as described in claim 5, characterized in that: The front end of the detection bolt (3) is threaded, and the rear side is smooth. The smooth part of the detection bolt (3) is slidably fitted to the second positioning sleeve (5).

7. The injector body thread inlet hole position gauge as described in claim 1 or 5, characterized in that: The base (1) has a cut surface, and the detection bolt (3) passes through the second positioning sleeve (5) from the cut surface.

8. The injector body thread inlet hole position gauge as described in claim 1, characterized in that: The base (1) has a threaded blind hole (104) at its top end, and the detection bolt (3) can be threaded into the threaded blind hole (104).

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