Automatic detection equipment for air tightness and sleeve flexibility of fuel injection pump

Abstract

The utility model is specifically related to a kind of automatic detection equipment of fuel injection pump air tightness and sleeve flexibility, including rack, electric turntable is fixedly connected on the rack, pump body positioning carrier is fixedly connected on the rotary disc of electric turntable, sleeve rotation detection mechanism and air tightness detection mechanism are provided with around electric turntable on the rack, sleeve rotation detection mechanism includes first pressure cylinder, seat plate, stand, fixed base, linear module, sliding base and jaw cylinder, sliding base is slidably connected with fixed base, and first spring is equipped between the both sides of sliding base and fixed base.The beneficial effects of the utility model are as follows: sleeve rotation test and pump body air tightness detection of fuel injection pump can be realized on one equipment, and the detection efficiency and detection quality of fuel injection pump are improved.

Description

Technical Field

[0001] This utility model relates to the field of pump body processing and testing equipment, specifically an automatic testing device for the air tightness and sleeve flexibility of an injection pump. Background Technology

[0002] The fuel injection pump is a core component of the diesel engine fuel supply system. Its main task is to pressurize low-pressure fuel to a very high pressure and deliver the fuel to the injectors of each cylinder in a timely, quantitative, and uniform manner, according to the engine's firing order and load requirements.

[0003] The fuel injection pump mainly consists of a pump body and a sleeve. The sleeve is assembled on the pump body and can rotate relative to the pump body. After the fuel injection pump is assembled and processed, it is necessary to test the airtightness of the pump body and the flexibility of the sleeve rotation. Although existing testing agencies can use airtightness testers to automatically test the pump body for airtightness, the flexibility of the sleeve rotation test still needs to be performed manually. Therefore, automatic testing equipment for the airtightness of the fuel injection pump and the flexibility of the sleeve is needed. Utility Model Content

[0004] The purpose of this invention is to provide an automatic testing device for the airtightness and sleeve flexibility of a fuel injection pump, which can perform sleeve rotation testing and pump body airtightness testing on a single device, thereby improving the testing efficiency and quality of the fuel injection pump.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic testing device for the airtightness and sleeve flexibility of an injection pump, comprising a frame, an electric turntable fixedly connected to the frame, a pump body positioning carrier fixedly connected to the rotating disk of the electric turntable, and a sleeve rotation testing mechanism and an airtightness testing mechanism arranged around the electric turntable on the frame. The sleeve rotation testing mechanism includes a first clamping cylinder, a base plate, a column, a fixed base, a linear module, a slide block, and a gripper cylinder. The slide block is slidably connected to the fixed base, and a first spring is provided between both sides of the slide block and the fixed base.

[0006] Furthermore, the pump body positioning carrier includes a carrier body and a floating seat, the floating seat being slidably connected to the carrier body, both the carrier body and the floating seat having positioning grooves, and a second spring being provided between the floating seat and the carrier body.

[0007] Furthermore, positioning columns are fixedly connected to both sides of the positioning groove on the floating seat.

[0008] Furthermore, the first pressing cylinder and the linear module are both fixedly connected to the frame, the base plate is fixedly connected to the piston rod of the first pressing cylinder, the column is fixedly connected to the base plate, the fixed seat is fixedly connected to the moving platform of the linear module, and the gripper cylinder is fixedly connected to the slide.

[0009] Furthermore, a displacement sensor is fixedly connected to the fixed base, and a light-shielding plate is fixedly connected to the housing of the gripper cylinder.

[0010] Furthermore, the airtightness testing mechanism includes a testing bracket, on which multiple testing cylinders and a second pressing cylinder are fixedly connected. A testing plug is fixedly connected to the piston rod of each testing cylinder, and the testing plug is provided with an inflation hole.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: it can realize the sleeve rotation test and pump body air tightness test of the fuel injection pump on one device, thereby improving the testing efficiency and quality of the fuel injection pump. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the pump body positioning carrier of this utility model.

[0014] Figure 3 This is a schematic diagram of the structure of the first pressing cylinder of this utility model.

[0015] Figure 4 This is a schematic diagram of the structure of the second pressing cylinder of this utility model.

[0016] Figure 5 This is a schematic diagram of the airtightness testing mechanism of this utility model.

[0017] In the diagram: 1. Frame; 2. Electric turntable; 3. Pump body positioning carrier; 301. Carrier body; 302. Floating seat; 303. Second spring; 304. Positioning column; 4. Sleeve rotation detection mechanism; 401. First clamping cylinder; 402. Seat plate; 403. Column; 404. Fixed seat; 405. Linear module; 406. Slide; 407. Grip cylinder; 408. First spring; 409. Displacement sensor; 410. Light shield; 5. Air tightness detection mechanism; 501. Detection bracket; 502. Detection cylinder; 503. Detection plug; 504. Second clamping cylinder; 6. Pump body; 7. Sleeve. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example:

[0020] Please see Figure 1-5 As shown, an automatic testing device for the air tightness and sleeve flexibility of an injection pump includes a frame 1, an electric turntable 2 fixedly connected to the frame 1, a pump body positioning carrier 3 fixedly connected to the rotating disk of the electric turntable 2, and a sleeve rotation testing mechanism 4 and an air tightness testing mechanism 5 arranged around the electric turntable 2 on the frame 1. The sleeve rotation testing mechanism 4 includes a first clamping cylinder 401, a base plate 402, a column 403, a fixed base 404, a linear module 405, a slide 406 and a gripper cylinder 407. The slide 406 is slidably connected to the fixed base 404, and a first spring 408 is provided between both sides of the slide 406 and the fixed base 404.

[0021] The pump body positioning carrier 3 includes a carrier body 301 and a floating seat 302. The floating seat 302 is slidably connected to the carrier body 301. A second spring 303 is provided between the floating seat 302 and the carrier body 301. The floating seat 302 can provide elastic buffering during inspection and loading / unloading to prevent product damage. Positioning grooves are provided on both the carrier body 301 and the floating seat 302. During inspection, the pump body 6 is positioned by the positioning grooves.

[0022] Positioning columns 304 are fixedly connected to both sides of the positioning groove on the floating seat 302. The positioning columns 304 can match the through holes on the pump body 6 for further positioning when the pump body 6 is positioned.

[0023] Both the first clamping cylinder 401 and the linear module 405 are fixedly connected to the frame 1. The extension and retraction of the piston rod of the first clamping cylinder 401 can clamp the pump body 6 during the sleeve rotation test. The seat plate 402 is fixedly connected to the piston rod of the first clamping cylinder 401. The column 403 is fixedly connected to the seat plate 402. The fixed seat 404 is fixedly connected to the moving platform of the linear module 405. The linear module 406 is used to drive the gripper cylinder 407 to move the sleeve left and right to perform rotation detection.

[0024] A displacement sensor 409 is fixedly connected to the fixed base 404, and a light-shielding plate 410 is fixedly connected to the housing of the gripper cylinder 407. The gap between the two grippers of the gripper cylinder 407 in the closed state is greater than the diameter of the sleeve. When performing a flexible rotation test on the sleeve 7, in order to detect whether the rotation angle range of the sleeve 7 is qualified, the gripper cylinder 407 is driven to translate by the linear module 405. The closed grippers of the gripper cylinder 407 will contact the sleeve 7 during the translation process and drive it to swing. During the swing process, the slide 406 will also translate on the fixed base 404. The displacement sensor 409 detects whether the gap with the light-shielding plate 410 is within the qualified range, thereby determining whether the rotation angle range of the sleeve 7 is qualified.

[0025] The air tightness testing mechanism 5 includes a testing bracket 501, on which multiple testing cylinders 502 and a second pressing cylinder 504 are fixedly connected. Each testing cylinder 502 has a testing plug 503 fixedly connected to its piston rod. The testing plug 503 has an inflation hole, which is connected to the testing end of an external air tightness testing instrument for inflation testing of air tightness.

[0026] The working principle of this utility model is as follows: In use, the pump body 6, with the sleeve 7 assembled on it, is first placed on the floating seat 302 along the positioning groove and positioning column 304. Then, the pump body 6 is rotated to the sleeve rotation test position by the electric turntable 2. (Refer to...) Figure 3 The piston rods of the two first pressing cylinders 410 extend, and the piston rod of the lower first pressing cylinder 401 extends, so that the column 403 contacts the lower end of the floating seat 302 for support and limitation. The piston rod of the upper first pressing cylinder 410 extends synchronously to press the pump body 6 onto the floating seat 302. Then, when the flexible rotation test of the sleeve 7 is carried out, in order to detect whether the rotation angle range of the sleeve 7 is qualified, the gripper cylinder 407 is driven to translate by the linear module 405. The gripper of the gripper cylinder 407 will contact the sleeve 7 during the translation process and drive it to swing. During the swing, the slide 406 will also translate on the fixed seat 404. The displacement sensor 409 detects whether the gap with the light shield 410 is within the qualified range, thereby determining whether the rotation angle range of the sleeve 7 is qualified.

[0027] Then, the electric turntable 2 drives the pump body 6 to rotate to the airtightness testing station. The diameter of the fixed test plug 503 on different test cylinders 502 is different, which can adapt to the airtightness testing of pump bodies 6 of different specifications (the pipe diameter of pump bodies 6 of different specifications is different). During the test, the piston rod of the test cylinder 502 extends to connect the test plug 503 with the pipe opening of the pump body 6 to achieve sealing. Then, an external airtightness tester fills the sealed pump body 6 with air to perform airtightness testing.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic testing device for the airtightness and sleeve flexibility of an injection pump, characterized in that: The device includes a frame (1), on which an electric turntable (2) is fixedly connected. A pump body positioning carrier (3) is fixedly connected to the rotating disk of the electric turntable (2). A sleeve rotation detection mechanism (4) and an airtightness detection mechanism (5) are arranged around the electric turntable (2) on the frame (1). The sleeve rotation detection mechanism (4) includes a first pressing cylinder (401), a seat plate (402), a column (403), a fixed seat (404), a linear module (405), a slide (406), and a gripper cylinder (407). The slide (406) is slidably connected to the fixed seat (404), and a first spring (408) is provided between both sides of the slide (406) and the fixed seat (404).

2. The automatic testing equipment for the airtightness of the fuel injection pump and the flexibility of the sleeve according to claim 1, characterized in that: The pump body positioning carrier (3) includes a carrier body (301) and a floating seat (302). The floating seat (302) is slidably connected to the carrier body (301). Positioning grooves are provided on both the carrier body (301) and the floating seat (302). A second spring (303) is provided between the floating seat (302) and the carrier body (301).

3. The automatic testing equipment for the airtightness of the fuel injection pump and the flexibility of the sleeve according to claim 2, characterized in that: Positioning columns (304) are fixedly connected to both sides of the positioning groove on the floating seat (302).

4. The automatic testing equipment for the airtightness of the fuel injection pump and the flexibility of the sleeve according to claim 1, characterized in that: The first pressing cylinder (401) and the linear module (405) are both fixedly connected to the frame (1). The seat plate (402) is fixedly connected to the piston rod of the first pressing cylinder (401). The column (403) is fixedly connected to the seat plate (402). The fixed seat (404) is fixedly connected to the moving platform of the linear module (405). The gripper cylinder (407) is fixedly connected to the slide (406).

5. The automatic testing equipment for the airtightness of the fuel injection pump and the flexibility of the sleeve according to claim 4, characterized in that: A displacement sensor (409) is fixedly connected to the fixed base (404), and a light shield (410) is fixedly connected to the housing of the gripper cylinder (407).

6. The automatic testing equipment for the airtightness of the fuel injection pump and the flexibility of the sleeve according to claim 1, characterized in that: The airtightness testing mechanism (5) includes a testing bracket (501), on which multiple testing cylinders (502) and a second pressing cylinder (504) are fixedly connected. A testing plug (503) is fixedly connected to the piston rod of each testing cylinder (502), and an air filling hole is provided on the testing plug (503).

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