CN101793510B - Device for measuring height from vertex of spherical seat of tappet body assembly of automobile fuel injection system to highest point of roller - Google Patents

Abstract

The invention designs a measuring device for the height from the apex of a spherical seat of a tappet assembly of an automobile fuel injection system to the highest point of a roller. The structure of the device mainly includes a positioning reference assembly and a measuring rod assembly. The lower positioning rod of the positioning reference assembly rises with the positioning cylinder, and relies on the spring force to position the apex of the spherical seat of the tappet body assembly. The upper end surface of the following measuring reference rod is the measuring reference; The knife-edge probe of the measuring rod assembly is lowered with the lifting cylinder, and acts on the roller by spring force, and the following digital display dial gauge probe is lowered to contact the measurement reference, and the indicated height is the deviation value relative to the standard measuring tool. The device is used in an automatic production line, and can quickly detect the height between the apex of the spherical seat of the tappet assembly and the highest point of the roller, which can improve detection efficiency, reduce the influence of human factors in the detection process, and improve product quality.

Description

Measuring device for the height from the top of the spherical seat of the tappet assembly of the automotive fuel injection system to the highest point of the roller

technical field

The device of the present invention is used in the automatic assembly line of the tappet assembly (13) in the fuel injection system of an automobile, and completes the measurement of the height H from the apex of the tappet spherical seat (13-2) to the highest point of the roller (13-1). .

Background technique

For the measurement of the height from the top of the spherical seat to the highest point of the roller after the tappet assembly is assembled, the manual measurement method was originally used. The manual measurement method not only has low production efficiency, but also has large uncertainties, and cannot meet the requirements of automatic detection on the automated assembly line. The measuring device is an automatic device for on-line height measurement using a relative measurement method.

Contents of the invention

The object of the present invention is to provide a measuring device for the height from the apex of the spherical seat of the tappet assembly of the automotive fuel injection system to the highest point of the roller in order to solve the defects in the prior art, which is used to replace the traditional manual detection and is suitable for automatic assembly production lines. To achieve the purpose of improving production efficiency and ensuring product quality.

For realizing the above-mentioned purpose of the invention, design of the present invention is as follows:

The basic principle of the measuring device is to use the relative measurement method, that is, to measure the deviation of the measured height of the product relative to the height of the standard measuring tool. The apex of the spherical seat is positioned by the lower positioning rod, and the moving measuring reference rod rises, and its end face is used as the measuring reference; the knife-edge probe measures the upper surface of the roller, and the following digital display dial gauge probe contacts the end face of the measuring reference rod. Read out the corresponding value. Its main mechanical structure is composed of three parts: positioning reference assembly, measuring rod assembly and standard measuring tool.

The above-mentioned positioning reference assembly is mainly composed of a positioning cylinder, a connecting rod, a compression spring, a reference connecting plate, a lower positioning rod and a measuring reference rod. The lower positioning rod and the measuring reference rod are installed on the linear guide rail through the reference connecting plate, and its up and down movement is driven by the positioning cylinder. A floating connection is adopted between the cylinder and the reference connecting plate. After the cylinder is pushed into place, the spring exerts pressure on the lower positioning rod. , to ensure the precise positioning of the workpiece by the lower positioning rod. The head of the lower positioning rod is a ball that is basically consistent with the geometric shape of the top surface of the spherical seat in the tappet assembly, and the bottom is a round rod made of plastic hose with suitable hardness. This flexible positioning rod can make the positioning circle The ball swings at any angle to ensure the close fit between the lower positioning rod and the spherical surface of the workpiece to be measured, and prevent the inaccurate positioning of the workpiece due to the low positioning accuracy of the positioning fixture on the rotary table.

The above-mentioned measuring rod assembly is mainly composed of a lifting cylinder, a linear guide rail, a connecting seat, a pull plate, a compression spring, a digital display dial indicator, a U-shaped connecting plate, and a knife-edge measuring head. The lifting cylinder and the linear guide rail are installed on the fixed support, the knife-edge probe and the digital display dial indicator are installed on the linear guide rail slider through the L-shaped connecting plate, and its up and down movement is driven by the cylinder. Floating connection, after the cylinder is pushed in place, the compression spring exerts a measuring force on the knife-edge probe to keep the probe in contact with the roller during the measurement process. The pull plate connected with the connecting seat pulls the L-shaped connecting plate to prevent the knife-edge probe from detaching from the cylinder control. The knife-edge measuring head is fixed under the connecting plate by screws, which can be easily assembled and disassembled and replaced regularly.

The above-mentioned standard measuring tools adopt a split structure and are connected by screws. The upper part is a cylinder, the upper and lower surfaces are ground, and its height is the height from the apex of the spherical seat required by the product to the highest point of the roller; the lower part is a cylinder with a through hole in the middle, and a keyway is milled on the side, and its height is the height of the tappet. The distance from the bottom surface of the body component to the vertex of the spherical seat.

According to above-mentioned inventive conception, the present invention adopts following technical steps:

A device for measuring the height from the apex of a spherical seat of a tappet assembly of an automobile fuel injection system to the highest point of a roller, comprising a measuring bench, a positioning reference assembly, a measuring rod assembly, a standard measuring tool, and a clamping tappet to be measured Positioning fixture for components.

The positioning cylinder in the above-mentioned positioning reference assembly pushes the lower positioning rod and the measuring reference rod through the first transmission mechanism. The two sides of the connecting seat of the cylinder are fixed with screws, and the spring seat is tightened. The spring seat is installed on the reference connecting plate, and a compression spring is installed between the spring seat and the cylinder connecting seat; the reference connecting plate The lower positioning rod and the measuring reference rod are fixedly installed; the reference connecting plate slides and cooperates with the linear guide rail fixed on the lower frame through a slide block.

The lifting cylinder in the above-mentioned measuring rod assembly pushes down the knife-edge measuring head and the digital display indicator through the second transmission mechanism. The structure is: a lifting cylinder is vertically fixed on the upper frame through the cylinder mounting seat, and is connected with the piston of the lifting cylinder. The connecting seat of the lifting cylinder is connected. The two sides of the connecting seat of the cylinder are fixed by screws to pull the plate, and the spring seat is tightened. The spring seat is installed on the U-shaped connecting plate. The spring is compressed, the digital display dial indicator is fixedly installed on the top of the U-shaped connecting plate, and the knife-edge measuring head is fixed by screws below; the left side of the U-shaped connecting plate slides and cooperates with the linear guide rail fixed on the upper frame through a slider.

The structure of the above-mentioned standard measuring tool is: composed of an upper cylinder and a lower cylinder. The height of the upper cylinder is the height from the apex of the spherical seat of the tappet to the highest point of the roller. There is a through hole in the middle of the lower cylindrical body to facilitate the passage of the lower positioning rod, and a keyway is milled on the side to avoid the positioning key in the positioning fixture.

Compared with the prior art, the present invention has the following obvious outstanding substantive features and significant advantages:

The invention adopts the relative measurement method, that is, measures the deviation of the measured height of the product relative to the height of the standard measuring tool, and can quickly detect the height between the apex of the spherical seat of the tappet assembly and the highest point of the roller, thereby improving the detection efficiency and reducing the human error in the detection process. Factors, improve product quality, suitable for automatic production lines.

Description of drawings

Fig. 1 is a structural schematic diagram of an embodiment of the present invention.

Figure 2 is a structural diagram of the tappet assembly.

Figure 3 is a structural diagram of a standard gauge.

Detailed ways

Preferred embodiments of the present invention are described in detail as follows in conjunction with accompanying drawings:

Embodiment 1: Referring to Fig. 1, Fig. 2 and Fig. 3, the measuring device for the height from the apex of the tappet spherical seat to the highest point of the roller of the automobile fuel injection system includes a measuring bench 30, a positioning reference assembly 31, and a measuring rod Assembly 32, a standard measuring tool 33 and a positioning fixture 14 for clamping the tappet assembly 13 to be tested. The positioning fixture 14 clamping the tappet assembly 13 to be tested is fixedly installed on the table top of the measuring bench 30; the positioning reference assembly 31 is installed on the table top of the measuring bench 30 through a lower frame 23 Below, the positioning reference assembly 31 has a positioning cylinder 22 to push a lower positioning rod 16 and a measurement reference rod 15 through the first transmission mechanism. 13-2 and its positioning, the upper end surface of the measuring reference rod 15 constitutes the measuring reference; the measuring rod assembly 32 is installed on the top of the measuring bench 30 table through the upper frame 1, and the measuring rod assembly 32 has a The lifting cylinder 5 pushes down a knife-edge probe 12 and a digital display dial indicator 9 through the second transmission mechanism. The thimble of the dial gauge 9 is against the upper end surface of the measuring reference rod 15 .

Embodiment 2: This embodiment is basically the same as Embodiment 1, the difference is as follows: the positioning cylinder 22 in the positioning reference assembly 31 is vertically fixed on the lower frame 23 through a cylinder mounting seat 24, which is different from the A cylinder connection seat 21 connected to the piston of the positioning cylinder 22 is connected. A pull plate 20 is fixed by screws on both sides of the cylinder connection seat 21, and a spring seat 18 is tightened. The spring seat 18 is installed on a reference connection plate 17 , the compression spring 19 is housed between the spring seat 18 and the cylinder connection seat 21; the lower positioning rod 16 and the measurement reference rod 15 are fixedly installed on the reference connection plate 17; the reference connection plate 17 passes through a slider 26 is slidably matched with a linear guide rail 25 that is fixed on the lower frame 23.

The lifting cylinder 5 in the measuring rod assembly 32 pushes down the knife-edge measuring head 12 and the digital indicator 9 through the second transmission mechanism. The structure is: the lifting cylinder 5 is vertically fixed on the upper machine through a cylinder mounting seat 4 On the frame 1, it is connected with the lifting cylinder connecting seat 6 connected with the piston of the lifting cylinder 5. The two sides of the lifting cylinder connecting seat 6 are fixed with a pull plate 7 by screws, and a spring seat 10 is tightened. The spring seat 10 is installed on a U-shaped connecting plate 11, a compression spring 8 is arranged between the spring seat 10 and the lifting cylinder connecting seat 6, and the digital display dial indicator 9 is fixedly installed above the U-shaped connecting plate 11, The knife-edge measuring head 12 is fixed below by screws; the left side of the U-shaped connecting plate slides with a linear guide rail 3 fixed on the upper frame 1 through a slider 2 .

The structure of the standard measuring tool 33 is: composed of an upper cylinder 27 and a lower cylinder 28, the lower cylinder 28 is milled with a waist groove, fixedly connected with the upper cylinder 27 by screws 29, the upper cylinder The height of 27 is the standard height H.

The structure of the lower positioning rod 16 is: it is composed of a head and a rod body. The unique flexible rod can make the positioning ball swing in any angle to ensure the precise positioning of the workpiece by the lower positioning rod.

The working principle of this embodiment is as follows: Before the automatic assembly line works, the digital display dial indicator needs to be adjusted first, that is, the standard measuring tool is placed in the positioning fixture, and the digital display dial indicator is reset to zero after being measured by the measuring device, and then The automatic production line can work. On the automatic assembly line, the tappet assembly is placed on the rotary table for inspection by the front manipulator, and the positioning and clamping are implemented. When the rotary table rotates in place, the positioning cylinder of the positioning reference assembly in the height measuring device stretches out, pushing the lower positioning rod and the measuring reference rod to rise, and under the action of the spring force, the lower positioning rod is attached to the spherical seat of the workpiece to be measured. position. At this time, the magnetic switch of the cylinder sends a signal, and the upper measuring rod assembly is under the action of the lifting cylinder, the knife-edge probe and the digital display dial indicator are lowered at the same time, and the knife-edge probe is at the highest level with the tappet roller under the action of the spring force. Point contact, and at the same time, the digital display dial indicator probe is in contact with the upper surface of the measurement reference rod to perform measurement. After the dial indicator reading is stable, record the measurement deviation value. After the measurement is completed, the lifting cylinder and the positioning cylinder retract at the same time, waiting for the next workpiece to be in place. During measurement, the digital display dial indicator outputs data to the PLC, and its value is the deviation value between the workpiece and the standard measuring tool, that is, the error value of the height. After being judged by the PLC, the unqualified workpieces are rejected by the subsequent sorting device.

Claims (5)

1. a tappet body assembly of automobile fuel injection system spheric seating summit is to the measurement mechanism of highest point of roller height, comprise the positioning fixture (14) of a measurement stand (30), a positioning reference assembly (31), a measuring staff assembly (32), an etalon (33) and a clamping tappet body assembly to be measured (13), it is characterized in that:

1) positioning fixture (14) of described clamping tappet body assembly to be measured (13) is fixedly mounted on the table top of described measurement stand (30);

2) described positioning reference assembly (31) is installed in the below of described measurement stand (30) table top by a lower bearing bracket (23), this positioning reference assembly (31) has a positioning cylinder (22) to elect a following backstay (16) and a measuring basis bar (15) through first gear train, this time backstay (16) is leaning tested tappet body assembly (13) sphere summit place (13-2) and to its location, the upper surface of this measuring basis bar (15) constitutes measuring basis; 3) described measuring staff assembly (32) is installed in the top of described measurement stand (30) table top by upper spider (1), this measuring staff assembly (32) has a lift cylinder (5) to push away an edge of a knife gauge head (12) and a digital display centimeter (9) under second gear train, this edge of a knife gauge head (12) abuts against the highest point of roller (13-1) of tested tappet body assembly (13), and the thimble of this digital display centimeter (9) props up the upper surface of described measuring basis bar (15).

2. according to the measurement mechanism of the described tappet body assembly of automobile fuel injection system spheric seating of claim 1 summit to the highest point of roller height, it is characterized in that the structure that positioning cylinder (22) is elected following backstay (16) and measuring basis bar (15) through first gear train in the described positioning reference assembly (31) is: described positioning cylinder (22) passes through a cylinder mount pad (24) vertical fixing on described lower bearing bracket (23), a cylinder Connection Block (21) that is connected with described positioning cylinder (22) piston links to each other, described cylinder Connection Block (21) both sides are by an arm-tie of screw retention (20), and strain a spring base (18), described spring base (18) is installed on base company's fishplate bar (17), between described spring base (18) and the cylinder Connection Block (21) compression spring (19) is housed; Described base company fishplate bar (17) is gone up fixed installation described backstay (16) and measuring basis bar (15) down; Described base company fishplate bar (17) is slidingly matched by a slide block (26) and a line slideway (25) that is fixed on the lower bearing bracket (23).

3. according to the measurement mechanism of the described tappet body assembly of automobile fuel injection system spheric seating of claim 1 summit to the highest point of roller height, it is characterized in that lift cylinder (5) described in the described measuring staff assembly (32) through the structure of push broach mouth gauge head (12) under second gear train and digital display centimeter (9) is: described lift cylinder (5) passes through a cylinder mount pad (4) vertical fixing on described upper spider (1), the lift cylinder Connection Block (6) that is connected with described lift cylinder (5) piston links to each other, described lift cylinder Connection Block (6) both sides are by an arm-tie of screw retention (7), and strain a spring base (10), described spring base (10) is installed on the U type web joint (11), between spring base (10) and the lift cylinder Connection Block (6) compression spring (8) is housed, described U type web joint (11) upper fixed is installed described digital display centimeter (9), and the below is by the described edge of a knife gauge head of screw retention (12); Described U type web joint passes on left a slide block (2) and is slidingly matched with a line slideway (3) that is fixed on the upper spider (1).

4. according to the measurement mechanism of the described tappet body assembly of automobile fuel injection system spheric seating of claim 1 summit to the highest point of roller height, the structure that it is characterized in that described etalon (33) is: be made up of a last right cylinder (27) and a following cylinder (28), described cylinder (28) down is milled with gain, fixedly connected with last right cylinder (27) by screw (29), the height of last right cylinder (27) is calibrated altitude H.

5. tappet body assembly of automobile fuel injection system spheric seating according to claim 1 summit is to the measurement mechanism of highest point of roller height, it is characterized in that the described structure of backstay (16) down is: form by the head and the body of rod, its head is and the middle corresponding to substantially ball of spheric seating end face geometric configuration of tappet body assembly (13), its body of rod is the rods that adopts the engineering plastics flexible pipe to make, can make swing in the location ball meaning angle in office, guarantee that backstay is to the accurate location of workpiece down.

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