Device for installing a shaft sleeve on a throttle body and method of using the same

Abstract

The present invention provides a processing device for installing a sleeve on a throttle body and a method for using the same, wherein the processing device for installing a sleeve on a throttle body comprises an air inlet for installing a throttle plate, the air inlet is provided with a sleeve mounting hole, and the processing device comprises a control mechanism, a pressing mechanism, a positioning mechanism for fixing the throttle body, and a pressing head for pressing the sleeve into the sleeve mounting hole of the throttle body. The present invention solves the following problems in the prior art: one is how to monitor the press-fitting quality of the sleeve and judge whether the press-fitting quality of the sleeve is qualified during the installation of the sleeve; the second is how to ensure that the positions of the two are not easily aligned during the process of pressing the sleeve into the sleeve mounting hole; the third is how to avoid deformation of the air inlet of the throttle body due to force during the process of pressing the sleeve into the sleeve mounting hole; and the fourth is how to ensure that the sleeve and the sleeve mounting hole are coaxial during the installation of the sleeve.

Description

Technical Field

[0001] The invention relates to the technical field of throttle bodies, and in particular to a device for installing a shaft sleeve on a throttle body and a method for using the device. Background Art

[0002] After the existing throttle body is installed with a sleeve, the press-fitting quality of the sleeve needs to be checked again, which is time-consuming and laborious. How to monitor the press-fitting quality of the sleeve during the installation process and determine whether the press-fitting quality of the sleeve is qualified has become a problem that needs to be solved.

[0003] In the prior art, a sleeve mounting hole on the throttle body needs to be installed with a sleeve. During the process of pressing the sleeve into the sleeve mounting hole, it is not easy to align the positions of the two (position alignment means that the sleeve is vertically pressed into the sleeve mounting hole). Inaccurate positions of the two will result in unqualified sleeve assembly.

[0004] Therefore, during the process of pressing the shaft sleeve into the shaft sleeve mounting hole, how to ensure that the two are aligned (aligned, that is, the shaft sleeve is vertically pressed into the shaft sleeve mounting hole) becomes a problem that needs to be solved.

[0005] In addition, in the process of pressing the sleeve into the sleeve mounting hole, preventing the intake passage of the throttle body from being deformed due to force also becomes a problem that needs to be solved. Summary of the invention

[0006] The object of the present invention is to provide a device for installing a sleeve on a throttle body and a method for using the same, mainly to solve the above-mentioned prior art problems: one, how to monitor the press-fitting quality of the sleeve and determine whether the press-fitting quality of the sleeve is qualified during the installation of the sleeve; the second problem: how to ensure that the positions of the two are aligned (position alignment means that the sleeve is vertically pressed into the sleeve mounting hole) during the installation of the sleeve; the third problem: how to avoid deformation of the intake duct of the throttle body due to force during the installation of the sleeve; the fourth problem: how to ensure that the sleeve and the sleeve mounting hole are coaxial during the installation of the sleeve, and provide a device for installing a sleeve on a throttle body and a method for using the same.

[0007] In order to achieve the above-mentioned object, the technical solution adopted by the present invention is: a device for installing a sleeve on a throttle body, the throttle body includes an air inlet for installing a throttle plate, the air inlet is provided with a sleeve mounting hole, and the device is characterized in that: the device includes a control mechanism, a pressing mechanism, a positioning mechanism for fixing the throttle body, and a pressure head for pressing the sleeve into the sleeve mounting hole of the throttle body;

[0008] The pressing mechanism includes a servo motor, a pressing head surface for pressing the pressing head into the shaft sleeve mounting hole, a pressure sensor for measuring the force of the pressing head, and a telescopic rod for driving the pressing head surface to press the pressing head into the shaft sleeve mounting hole. The servo motor drives the telescopic rod to move up and down, the bottom of the telescopic rod is connected to the pressing head surface and the pressure sensor, and the top of the telescopic rod is connected to the servo motor;

[0009] The control mechanism controls the operation of the servo motor, and the pressure sensor feeds back the pressure head force condition to the control mechanism, which determines whether the throttle body and the shaft sleeve are installed properly.

[0010] Furthermore, the equipment also includes a frame, a pressing mechanism is fixed above the frame, a workbench is provided in the middle of the frame, a positioning mechanism is provided on the workbench, and the positioning mechanism is located below the pressing mechanism; a loading box is provided on the workbench, and a first sensor is provided at the feeding port of the loading box, and the first sensor monitors the material taking situation of the loading box and feeds back to the control mechanism.

[0011] Furthermore, the workbench is provided with a plurality of support columns, and a mounting plate for fixing the pressing mechanism is provided on the top of the support columns; a scanning gun is provided on one of the support columns, and the scanning gun is used to scan the throttle body information and feed back the throttle body information to the control mechanism;

[0012] The device also includes a dual start switch, which is respectively arranged on the two support columns. The dual start switch feeds back to the control mechanism the readiness of the pressure head equipped with the shaft sleeve to be inserted into the shaft sleeve installation hole.

[0013] Furthermore, the control mechanism includes a PLC, a touch screen display and an alarm, the touch screen display is arranged above the rack, and the touch screen display is connected to the PLC; the PLC controls the operation of the alarm;

[0014] A slide rail and a cylinder for moving the positioning mechanism forward and backward are arranged between the positioning mechanism and the workbench, and the cylinder is controlled and operated by a PLC;

[0015] The pressing mechanism further comprises a travel switch for limiting the zero position of the pressure head surface and the pressure sensor, and the travel switch is arranged at the bottom of the mounting plate.

[0016] Further, the positioning mechanism includes a fixed base and a guide column, the fixed base is provided with a vertical fixed plate, one side of the fixed plate is provided with a support portion, the middle part of the support portion is provided with a vertical guide column hole, the guide column penetrates the shaft sleeve mounting hole and then is embedded in the guide column hole; the top of the support portion is arc-shaped, and after the support portion is embedded in the air inlet duct, the top of the support portion matches the shape of the inner wall of the air inlet duct;

[0017] The pressure head is cylindrical, the top of the guide column is connected to the center of the bottom of the pressure head, the cross-sectional diameter of the pressure head is larger than the cross-sectional diameter of the guide column, and the top of the guide column and the bottom of the pressure head form a first step;

[0018] The bottom of the sleeve mounting hole is connected to the shaft mounting hole, and the top of the sleeve mounting hole is connected to the pressure head stop hole. The pressure head stop hole, the sleeve mounting hole and the shaft mounting hole form a coaxial stepped hole with a decreasing aperture from top to bottom.

[0019] A second step portion is formed between the pressure head stop hole and the shaft sleeve mounting hole, and a third step portion is formed between the shaft sleeve mounting hole and the shaft mounting hole;

[0020] The diameter of the shaft mounting hole is equal to the diameter of the guide post hole;

[0021] There is a clearance fit between the guide post and the guide post hole; there is a clearance fit between the guide post and the shaft mounting hole; the clearance between the guide post and the guide post hole is 0.02mm; the clearance between the guide post and the shaft mounting hole is 0.02mm;

[0022] There is a clearance fit between the pressure head stop hole and the pressure head.

[0023] Further, the shaft sleeve is sleeved on the guide column, and when the guide column with the shaft sleeve sleeved passes through the pressure head stop hole, the shaft sleeve mounting hole and the shaft mounting hole in sequence and is embedded in the guide column hole of the support part, the pressure head is embedded in the pressure head stop hole, the first step portion and the second step portion are abutted, and the shaft sleeve is placed on the third step portion, and the top end surface of the shaft sleeve is flush with the second step portion; there is an interference fit between the shaft sleeve and the shaft sleeve mounting hole;

[0024] There is a clearance fit between the shaft sleeve and the guide column.

[0025] Furthermore, an extension plate extending downward is provided at the bottom of the support portion near one end of the fixing plate, and the bottom of the extension plate is arc-shaped;

[0026] An auxiliary plate is provided on the side of the fixing plate, a circular auxiliary mounting hole is provided in the middle of the auxiliary plate, the support part passes through the auxiliary mounting hole and is connected to the fixing plate, and the top and bottom of the support part are matched with the auxiliary mounting hole;

[0027] The fixing plate is also provided with a rotatable clamping portion for clamping the throttle body; and a reinforcing plate is provided on the other side of the fixing plate.

[0028] A method for using a device for installing a shaft sleeve on a throttle body, which relates to the above-mentioned device for installing a shaft sleeve on a throttle body, comprises the following specific steps:

[0029] S01: Take out the sleeve from the loading box, the first sensor senses the sleeve removal status and feeds back the status to the PLC;

[0030] S02: PLC controls the operation of the cylinder, and the cylinder drives the positioning mechanism to move forward from the position directly below the pressing mechanism;

[0031] S03: Put the shaft sleeve on the guide post at the bottom of the pressure head, put the air inlet of the throttle body on the support part, and make the shaft mounting hole correspond to the guide post hole, and then insert the guide post into the guide post hole. At this time, the scanner scans the barcode or QR code of the throttle body and feeds back the scanning situation to the PLC, and the PLC determines whether the throttle body is a qualified product to be assembled;

[0032] S04: Through the double start switch, the preparation work is completed. The PLC controls the cylinder to run. The cylinder drives the positioning mechanism to move backward until it is directly below the pressure head surface. The PLC then controls the pressure head surface and the pressure sensor to move downward. The pressure head is pressed downward by the pressure head surface. The pressure head and the shaft sleeve are pressed downward until the shaft sleeve is pressed into the shaft sleeve mounting hole. At this time, the pressure head surface, the pressure sensor and the pressure head stop moving downward. The pressure sensor measures the pressure value at each position during the pressure head pressing process and feeds back the pressure value at each position to the PLC. The PLC determines whether the assembly quality of the shaft sleeve into the shaft sleeve mounting hole is qualified. If it is not qualified, the PLC controls the alarm to sound.

[0033] S05: PLC controls the pressure head surface and the pressure sensor to move upward until they touch the travel switch and stop moving;

[0034] At this time, the guide column with the sleeve already put on passes through the pressure head stop hole, the sleeve mounting hole and the shaft mounting hole in sequence. After being embedded in the guide column hole of the support part, the pressure head is embedded in the pressure head stop hole, and the first step portion and the second step portion are abutted against each other. At this time, the pressure head and the guide column no longer move downward, the sleeve is placed on the third step portion, and the top end face of the sleeve is flush with the second step portion. After the pressure head is taken out, the installation of the sleeve and the sleeve mounting hole is completed.

[0035] Furthermore, in step S04, during the downward movement of the pressure head surface and the pressure sensor controlled by the PLC, the downward movement speed is first fast and then slow.

[0036] Further, in step S04, the PLC determines whether the assembly quality of the sleeve into the sleeve mounting hole is qualified in the following manner: the PLC forms a pressure displacement curve according to the pressure value of each position measured by the pressure sensor during the downward pressure of the pressure head, and compares the pressure displacement curve with the pressure displacement upper limit curve and the pressure displacement lower limit curve pre-set in the PLC. If the pressure displacement curve exceeds the pressure displacement upper limit curve or is lower than the pressure displacement lower limit curve, it is considered that the assembly quality is unqualified; if the pressure displacement curve is between the pressure displacement upper limit curve and the pressure displacement lower limit curve, it is considered that the assembly quality is qualified;

[0037] The pressure displacement curve is displayed by a touch screen display;

[0038] The control mechanism also includes an MES system, and the PLC feeds back the received information and judgment to the MES system, and reads the throttle body pre-process information from the MES system;

[0039] The pressure sensor and PLC form a protection mechanism;

[0040] The PLC determines whether the sleeve press-fitting is qualified through the relationship between the pressure displacement curve and the pressure displacement upper limit curve and the pressure displacement lower limit curve. If it is unqualified, the reason for the failure is predicted.

[0041] In view of the above technical features, the present invention has the following beneficial effects:

[0042] 1. The pressure head and positioning mechanism of the present invention are designed with a guide column and a support part with a guide column hole. After the throttle body is fixed, the guide column is embedded in the sleeve mounting hole and the guide column hole of the throttle body, so that the sleeve mounting hole and the guide column hole are aligned and the upper and lower openings of the sleeve mounting hole are kept in a vertical direction, which is convenient for the sleeve to be nested on the guide column, and then the sleeve is vertically pressed into the sleeve mounting hole. In this way, during the process of pressing the sleeve into the sleeve mounting hole, the positions of the two are ensured to be aligned (position alignment means that the sleeve is vertically pressed into the sleeve mounting hole), thereby improving the qualified rate of assembly of the two.

[0043] 2. The supporting portion of the positioning mechanism of the present invention is inserted into the air inlet duct of the throttle body and supports the throttle body, so that during the process of pressing the sleeve into the sleeve mounting hole, only one side of the air inlet duct corresponding to the sleeve mounting hole is affected by pressure, and the pressure during the sleeve pressing process will not have a pressure effect on both sides of the air inlet duct at the same time, thereby avoiding deformation of the air inlet duct of the throttle body due to force and keeping the shape of the air inlet duct of the throttle body unchanged as much as possible.

[0044] 3. The present invention provides a device for installing a sleeve on a throttle body, comprising a servo press (i.e., a pressing mechanism including a servo motor), a pressure sensor, a product positioning fixture (positioning mechanism), and a PLC control system (i.e., including a PLC control mechanism and an MES system). The device can press a sleeve of a throttle shaft into a housing of the throttle at a specified speed (i.e., the sleeve is pressed into a sleeve mounting hole). The control system collects data from the pressure sensor in real time during the pressing process. The PLC can determine whether the interface dimensions of the two parts (the sleeve and the sleeve mounting hole) are within a tolerance range during assembly by comparing the collected data with the required values ​​(such as a pressure-displacement curve). By analyzing the collected data, it can also be determined whether the positioning of the two parts during assembly is correct.

[0045] 4. To fully guarantee the quality, before using the device for installing the sleeve on the throttle body according to the present invention, it is necessary to manually inspect each part, namely the sleeve and the hole matching the sleeve, before using it (i.e. installing the sleeve on the throttle body). After using the device for installing the sleeve on the throttle body according to the present invention, it is no longer necessary to inspect the parts, which improves the production efficiency and saves labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a front view of a device for installing a sleeve on a throttle body in Example 1.

[0047] Figure 2 This is a partial view of a device for installing a sleeve on a throttle body in Example 1.

[0048] Figure 3 yes Figure 3 front side.

[0049] Figure 4 yes Figure 3 Axonometric drawing of .

[0050] Figure 5 yes Figure 3 Rear view of.

[0051] Figure 6 This is a front view of a positioning mechanism for a sleeve mounting hole on a throttle body in Example 1. Figure 1 .

[0052] Figure 7 It is a three-dimensional positioning mechanism for the sleeve mounting hole on the throttle body in embodiment 1. Figure 1 .

[0053] Figure 8 This is a front view of a positioning mechanism for a sleeve mounting hole on a throttle body in Example 1. Figure 2 (minus the clamping part).

[0054] Fig. 9 This is a front view of a positioning mechanism for a sleeve mounting hole on a throttle body in Example 1. Figure 3 (Except the clamping part and the throttle body).

[0055] Fig.10 It is a three-dimensional positioning mechanism for the sleeve mounting hole on the throttle body in embodiment 1. Figure 2 (Except the clamping part and the throttle body).

[0056] Fig.11 It is a three-dimensional diagram of the support portion in Example 1.

[0057] Fig.12It is a schematic diagram of the structure of the connection between the pressure head, the guide column and the sleeve in Example 1.

[0058] Fig.13 It is a schematic diagram of the structure of the connection between the pressure head and the guide column in Example 1.

[0059] Fig.14 A cross-sectional view of a positioning mechanism for a sleeve mounting hole on a throttle body in Example 1 Figure 1 (Except the pressure head, guide pin and bushing).

[0060] Fig.15 yes Fig.14 Axonometric drawing of .

[0061] Fig.16 It is a cross-sectional view of a positioning mechanism for a sleeve mounting hole on a throttle body in Example 1 (mounting a pressure head, a guide column and a sleeve).

[0062] Fig.17 It is a pressure displacement curve diagram of the pressure sensor in Example 1 measuring the stress on the sleeve installation (the sleeve installation quality is qualified).

[0063] Fig.18 It is a pressure displacement curve diagram of the pressure sensor in Example 1 measuring the stress on the sleeve installation (the sleeve installation quality is unqualified, and the dimensional interference between the sleeve installation hole and the sleeve is large).

[0064] Fig.19 It is a pressure displacement curve diagram of the pressure sensor in Example 1 measuring the stress on the sleeve installation (the sleeve installation quality is unqualified, and the interference between the sleeve 11 and the throttle body 1 is insufficient).

[0065] Fig. 20 It is a pressure displacement curve diagram of the pressure sensor in Example 1 measuring the stress on the sleeve installation (the sleeve installation quality is unqualified, and the sleeve 11 is not properly installed in the sleeve installation hole 3).

[0066] In the figure: 1, throttle body; 2, intake duct; 3, sleeve mounting hole; 3-1, third step portion;

[0067] 4. Fixed base; 4-1 reinforcement plate; 5. Guide column;

[0068] 6. Fixed plate; 6-1 Auxiliary plate; 6-2 Auxiliary mounting hole; 6-3 Clamping part;

[0069] 7. Supporting part; 7-1. Guide post hole; 7-2. Extension plate;

[0070] 8. Press head; 8-1. First step portion; 9. Press head stop hole; 9-1. Second step portion;

[0071] 10. Shaft mounting hole; 11. Shaft sleeve; 12-1. Touch screen display;

[0072] 13. Pressing mechanism; 13-1. Servo motor; 13-2. Pressing head surface; 13-3. Telescopic rod; 13-4. Pressure sensor;

[0073] 14, rack; 14-1, mounting plate; 14-2, support column; 14-3, workbench; 14-4, loading box; 14-5, slide rail; 14-6, first sensor; 14-7, cylinder; 14-8, scanner; 14-9, travel switch; 15, positioning mechanism;

[0074] L1, pressure-displacement curve generated by sleeve press-fitting; L2, pressure-displacement upper limit curve; L3, pressure-displacement lower limit curve. DETAILED DESCRIPTION

[0075] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0076] See also Figures 1 to 20 , Specific embodiment 1, this embodiment 1 provides a device for installing a sleeve on a throttle body, the throttle body 1 includes an intake duct 2 for installing a throttle plate, the intake duct 2 is provided with a sleeve mounting hole 3, the device includes a control mechanism, a pressing mechanism 13, a positioning mechanism 15 for fixing the throttle body 1, and a pressing head 8 for pressing the sleeve 11 into the sleeve mounting hole 3 of the throttle body 1;

[0077] The pressing mechanism 13 includes a servo motor 13-1, a pressing head surface 13-2 for pressing the pressing head 8 into the shaft sleeve mounting hole 3, a pressure sensor 13-4 for measuring the force of the pressing head 8, and a telescopic rod 13-3 for driving the pressing head surface 13-2 to press the pressing head 8 into the shaft sleeve mounting hole 3. The servo motor 13-1 drives the telescopic rod 13-3 to move up and down. The bottom of the telescopic rod 13-3 is connected to the pressing head surface 13-2 and the pressure sensor 13-4, and the top of the telescopic rod 13-3 is connected to the servo motor 13-1.

[0078] The control mechanism controls the operation of the servo motor 13-1, and the pressure sensor 13-4 feeds back the force of the pressure head 8 to the control mechanism, and the control mechanism determines whether the throttle body 1 and the sleeve 11 are installed properly. The control mechanism includes a PLC (not shown in the attached figure, for example, the PLC uses Siemens S7-1200), a touch screen display 12-1 and an alarm (not shown in the attached figure). The touch screen display 12-1 is arranged above the frame 14, and the touch screen display 12-1 is connected to the PLC. The PLC forms a pressure displacement curve according to the pressure value of each position measured by the pressure sensor 13-4 during the pressing process of the pressure head 8. This pressure displacement curve is displayed by the touch screen display 12-1. Once the sleeve 11 is not pressed properly, the operator or manager can judge the problems in the pressing of the sleeve 11 through the pressure displacement curve displayed by the touch screen display 12-1; the PLC controls the operation of the alarm; the touch screen display 12-1 realizes the visualization of processing information (including but not limited to the pressure displacement curve), and can also be used to input information to debug the equipment.

[0079] A slide rail 14-5 and a cylinder 14-7 for moving the positioning mechanism 15 forward and backward are provided between the positioning mechanism 15 and the workbench 14-3, and the cylinder 14-7 is controlled by the PLC; when the PLC receives the signal from the first sensor 14-6 that the operator has taken the sleeve 11, the PLC controls the cylinder 14-7 to drive the positioning mechanism 15 to move forward from the position directly below the pressing mechanism 13, so that the operator can embed the guide column 5 with the sleeve 11 into the sleeve mounting hole 3, and at the same time, the pressure head 8 is embedded in the pressure head stop hole 9 and the shaft mounting hole 10 (that is, the pressure head 8 is installed). This design is also safer, that is, when the operator is installing the pressure head 8, even if the pressing mechanism 13 is accidentally pressed down, it will not cause harm to the operator. When the pressure head 8 is installed, the operator presses the double start switch (not shown in the attached figure) with both hands. The double start switch feeds back to the PLC that the preparation work is completed. The PLC controls the cylinder 14-7 to drive the positioning mechanism 15 to move backward until it is directly below the pressing mechanism 13, waiting for the PLC to control the pressing mechanism 13 to press down.

[0080] An NG waste collection box (not shown in the drawings) is provided below the workbench 14 - 3 to collect unqualified sleeves 11 .

[0081] The pressing mechanism 13 further includes a travel switch 14 - 9 for limiting the zero position of the pressure head surface 13 - 2 and the pressure sensor 13 - 4 , and the travel switch 14 - 9 is arranged at the bottom of the mounting plate 14 - 1 .

[0082] The equipment also includes a frame 14, a pressing mechanism 13 is fixed above the frame 14, a workbench 14-3 is provided in the middle of the frame 14, a positioning mechanism 15 is provided on the workbench 14-3, and the positioning mechanism 15 is located below the pressing mechanism 13; a loading box 14-4 is provided on the workbench 14-3, and a first sensor 14-6 is provided at the feeding port of the loading box 14-4, and the first sensor 14-6 monitors the material taking situation of the loading box 14-4 and feeds back to the control mechanism.

[0083] The loading box 14-4 is used to place the sleeve 11 for the operator to take. Once the operator takes the sleeve 11 from the loading box 14-4, the first sensor 14-6 will sense it and feedback the operator's taking of the sleeve 11 to the PLC as one of the preconditions for the PLC to control the pressing mechanism 13 to press down (that is, if the PLC does not receive the signal fed back by the first sensor 14-6, the PLC will not control the pressing mechanism 13 to press down to prevent the operator from missing the sleeve 11). This will not avoid the occurrence of air pressure after the pressing mechanism 13 is pressed down (that is, if the sleeve 11 is not taken from the loading box 14-4, it is even more impossible to install the sleeve 11 under the guide column 5 under the pressure head 8. At this time, if the pressing mechanism 13 is pressed down, air pressure will occur).

[0084] The workbench 14-3 is provided with a plurality of support columns 14-2, and a mounting plate 14-1 for fixing the pressing mechanism 13 is provided on the top of the support columns. In the present embodiment 1, four support columns are provided, which are respectively located at the four corners of the mounting plate 14-1; a scanning gun 14-8 is provided on one of the support columns 14-2, and the scanning gun 14-8 is used to scan the information of the throttle body 1 and feed back the information of the throttle body 1 to the control mechanism; the scanning gun 14-8 scans the information such as the QR code or the bar code on the throttle body 1 and feeds back the scanning situation to the PLC, and the PLC judges the information. Whether the throttle body 1 has been processed in the previous process (i.e., whether it is a qualified product to be assembled, for example, the PLC determines whether the throttle body 1 has been processed in the previous process by reading the processing data of the throttle body 1 in the MES system). If the throttle body 1 has not been processed in the previous process, the PLC will alarm through the alarm to remind the operator that the throttle body 1 has not been processed in the previous process. The throttle body 1 has been processed in the previous process, which is the second prerequisite for the PLC to control the pressing mechanism 13 to press down. If the scanning gun 14-8 scans the throttle body 1 information and cannot read the information or the information read is inconsistent with the throttle body 1 previous process information read by the PLC from the MES system, the PLC will not control the pressing mechanism 13 to move downward.

[0085] The device further comprises a double start switch, which is respectively arranged on two support columns 14-2, and the double start switch feeds back to the control mechanism the state that the pressing head 8 with the sleeve 11 installed is ready to be inserted into the sleeve mounting hole 3. The double start switch can be started only when the operator operates with both hands (i.e., the left and right switches must be pressed at the same time), so that before the pressing mechanism 13 is pressed down, the operator's hands are ensured to leave the pressing head 8, so as to ensure the safety of the operator's operation and reduce the possibility of accidents.

[0086] The operator puts the sleeve 11 on the guide column 5 under the pressure head 8, and then passes the guide column 5 through the pressure head stop hole 9, the sleeve mounting hole 3 and the shaft mounting hole 10 in sequence, and embeds it into the guide column hole 7-1 of the support part 7, and then starts the double start switch with both hands. Once the double start switch is turned on, it means that the sleeve 11 is placed in the specified position (that is, the preparation work is completed). The double start switch feeds back to the PLC that the preparation work is completed, which serves as the third prerequisite for the PLC to control the pressing mechanism 13 to press down.

[0087] Only when the first, second and third preconditions are all met, the PLC will control the pressing mechanism 13 to press down, thereby ensuring the effectiveness of the installation of the sleeve 11 and the safety during the installation process to the greatest extent.

[0088] The positioning mechanism 15 includes a fixed base 4 and a guide column 5. The fixed base 4 is provided with a vertical fixed plate 6. A support portion 7 is provided on one side of the fixed plate 6. A vertical guide column hole 7-1 is provided in the middle of the support portion 7. The guide column 5 passes through the shaft sleeve mounting hole 3 and is embedded in the guide column hole 7-1.

[0089] The top of the support portion 7 is arc-shaped. After the support portion 7 is embedded in the intake duct 2, the top of the support portion 7 matches the shape of the inner wall of the intake duct 2; that is, the curvature of the top of the support portion 7 is the same as the curvature of the inner wall of the intake duct 2. After the support portion 7 is embedded in the intake duct 2, the top of the support portion 7 can fit the inner wall of the intake duct 2. At this time, the support portion 7 plays a stable supporting role on the inner wall of the intake duct 2 (that is, the top of the support portion 7 supports the throttle body 1). Once the guide column 5 positions the support portion 77 and the sleeve mounting hole 3 (that is, the guide column hole 7-1 of the support portion 7 and the sleeve mounting hole 3 in the vertical direction coincide with the axis or are deemed to coincide with the axis within the allowable deviation range, such as the axis distance within 0.01 mm, and the guide column 5 penetrates the sleeve mounting hole 3 and is embedded in the guide column hole 7-1), the throttle body 1 will not move easily.

[0090] During the process of the guide post 5 being embedded in the guide post hole 7-1, the arc-shaped design of the top of the support portion 7 can also help the bushing mounting hole 3 and the shaft mounting hole 10 to be quickly aligned with the guide post hole 7-1. Under the action of its own gravity and the guidance of the guide post 5, the throttle body 1 can quickly adjust its own position, and quickly achieve the purpose of aligning the bushing mounting hole 3 and the shaft mounting hole 10 with the guide post hole 7-1 (that is, the three are coaxial).

[0091] The fixed base 4 supports the entire positioning mechanism 15, the fixed plate 6 is vertically arranged on the fixed base 4, the support part 7 is parallel to the fixed base 4, preferably, the distance from the top of the support part 7 to the fixed base 4 is greater than the height of the throttle body 1, after the support part 7 is embedded in the intake duct 2, the throttle body 1 can be suspended on the support part 7, when the guide column 5 or the guide column 5 after the nested sleeve 11 is installed in the sleeve mounting hole 3 under the drive of the pressure head 8, the pressure generated by the pressure head 8 will only act on the side wall of the intake duct 2, will not affect the shape of the intake duct 2, and avoid the intake duct 2 from being deformed due to the force of the pressure head 8.

[0092] The pressure head 8 is cylindrical (such as a cylinder), the top of the guide pillar 5 is connected to the center of the bottom of the pressure head 8, the cross-sectional diameter of the pressure head 8 is larger than the cross-sectional diameter of the guide pillar 5, and the top of the guide pillar 5 and the bottom of the pressure head 8 form a first step 8-1;

[0093] The bottom of the sleeve mounting hole 3 is connected to the shaft mounting hole 10, and the top of the sleeve mounting hole 3 is connected to the pressure head stop hole 9. The pressure head stop hole 9, the sleeve mounting hole 3 and the shaft mounting hole 10 form a coaxial stepped hole with a decreasing aperture from top to bottom.

[0094] A second step portion 9-1 is formed between the pressure head stop hole 9 and the sleeve mounting hole 3, and a third step portion 3-1 is formed between the sleeve mounting hole 3 and the shaft mounting hole 10;

[0095] The diameter of the shaft mounting hole 10 is equal to the diameter of the guide post hole 7-1;

[0096] The first step 8-1 matches the second step 9-1, the third step 3-1 is used to place or install the sleeve 11, and the space formed between the guide column 5 and the sleeve mounting hole 3 is used to install the sleeve 11. The shaft mounting hole 10 communicates with the air inlet 2 and the sleeve mounting hole 3.

[0097] There is a clearance fit between the guide column 5 and the guide column hole 7-1; there is a clearance fit between the guide column 5 and the shaft mounting hole 10; preferably, the clearance between the guide column 5 and the guide column hole 7-1 is 0.02mm, which can not only meet the requirements of free movement or activity between the guide column 5 and the guide column hole 7-1, but also facilitate the insertion of the guide column 5 into the guide column hole 7-1 or the removal of the guide column 5 from the guide column hole 7-1. At the same time, after the guide column 5 is embedded in the guide column hole 7-1, the guide column 5 can be located in the middle of the guide column hole 7-1 as much as possible, thereby indirectly achieving the coincidence of the axes of the bushing mounting hole 3, the shaft mounting hole 10 and the guide column hole 7-1 in the vertical direction or being regarded as coincident within the allowable deviation range (for example, the axis distance is within 0.01mm).

[0098] Preferably, the gap between the guide column 5 and the shaft mounting hole 10 is 0.02 mm, which can not only meet the requirements of free movement or activity between the guide column 5 and the shaft mounting hole 10, but also facilitate the insertion of the guide column 5 into the shaft mounting hole 10 or the removal of the guide column 5 from the shaft mounting hole 10. At the same time, after the guide column 5 is embedded in the shaft mounting hole 10, the guide column 5 can be located in the middle of the shaft mounting hole 10 as much as possible, thereby indirectly achieving the coincidence of the axes of the sleeve mounting hole 3, the shaft mounting hole 10 and the guide column hole 7-1 in the vertical direction or the axes are regarded as coincident within the allowable deviation range (for example, the axis distance is within 0.01 mm).

[0099] There is a clearance fit between the pressure head stop hole 9 and the pressure head 8 , which facilitates the pressure head 8 to be inserted into the pressure head stop hole 9 and to be pulled out of the pressure head stop hole 9 .

[0100] The shaft sleeve 11 is sleeved on the guide column 5. When the guide column 5 with the shaft sleeve 11 is sequentially passed through the pressure head stop hole 9, the shaft sleeve mounting hole 3 and the shaft mounting hole 10, and is embedded in the guide column hole 7-1 of the support part 7, the pressure head 8 is embedded in the pressure head stop hole 9, and the first step portion 8-1 and the second step portion 9-1 are abutted. At this time, the pressure head 88 and the guide column 55 no longer move downward. At this time, the shaft sleeve 11 is placed on the third step portion 3-1, and the top end surface of the shaft sleeve 11 is flush with the second step portion 9-1; there is an interference fit between the shaft sleeve 11 and the shaft sleeve mounting hole 3;

[0101] There is an interference fit between the sleeve 11 and the sleeve mounting hole 3, and there is a clearance fit between the sleeve 11 and the guide column 5, that is, once the sleeve 11 is pressed into the sleeve mounting hole 3, the sleeve 11 and the sleeve mounting hole 3 are clamped, and the guide column 5 can be freely pulled out of the sleeve 11.

[0102] The bottom of the support portion 7 is provided with an extension plate 7-2 extending downward near one end of the fixing plate 6, and the bottom of the extension plate 7-2 is arc-shaped; an auxiliary plate 6-1 is provided on the side of the fixing plate 6, and a circular auxiliary mounting hole 6-2 is provided in the middle of the auxiliary plate 6-1. The support portion 7 passes through the auxiliary mounting hole 6-2 and is connected to the fixing plate 6, and the top and bottom of the support portion 7 are matched with the auxiliary mounting hole 6-2; that is, the support portion 7 is located in the auxiliary mounting hole 6-2, and the arc of the top of the support portion 7 fits with the upper inner arc of the auxiliary mounting hole 6-2, and the bottom of the support portion 7 fits with the lower inner arc of the auxiliary mounting hole 6-2. In this way, the support portion 7 can be more stably fixed in the auxiliary mounting hole 6-2, and the support portion 7 will not move, ensuring that the guide column hole 7-1 is always in a vertical state, ensuring the accurate positioning of the guide column 5 and the guide column hole 7-1 to the shaft mounting hole 10 and the sleeve mounting hole 3, so that the sleeve 11 can also be more accurately installed in the sleeve mounting hole 3.

[0103] The fixing plate 6 is also provided with a rotatable clamping portion 6-3 for clamping the throttle body 1; when the throttle body 1 is sleeved on the supporting portion 7 and the shaft mounting hole 10 of the throttle body 1 and the guide column hole 7-1 are aligned and positioned by the guide column 5 (at this time, the sleeve mounting hole 3 and the guide column hole 7-1 are also aligned and positioned), the rotatable clamping portion 6-3 presses against the throttle body 1, that is, the rotatable clamping portion 6-3 and the auxiliary plate 6-1 clamp the throttle body 1, which is convenient for the pressing head 8 to press the sleeve 11 into the sleeve mounting hole 3, and can prevent the throttle body 1 from moving during the process of pressing the sleeve 11 into the sleeve mounting hole 3 (that is, the throttle body 1 drives the sleeve mounting hole 3 to move), which affects the installation quality of the sleeve 11 being pressed into the sleeve mounting hole 3.

[0104] A reinforcing plate 4-1 is provided on the other side of the fixing plate 6 to ensure that the fixing plate 6 always remains perpendicular to the fixing base 4, so as to ensure that the support part 7 and the throttle body 1 are accurately positioned, and the guide column 5 and the guide column hole 7-1 can accurately position the shaft mounting hole 10 and the sleeve mounting hole 3.

[0105] In this embodiment 1, a method for using a device for installing a sleeve on a throttle body involves the above-mentioned device, and the specific steps are as follows:

[0106] S01: Take out the sleeve 11 from the loading box 14-4, and the first sensor 14-6 senses the removal status of the sleeve 11 and feeds back the status to the PLC;

[0107] S02: PLC controls the cylinder 14-7 to operate, and the cylinder 14-7 drives the positioning mechanism 15 to move forward from the position directly below the pressing mechanism 13;

[0108] S03: Put the shaft sleeve 11 on the guide post 5 at the bottom of the pressure head 8, put the air inlet 2 of the throttle body 1 on the support part 7, and make the shaft mounting hole 10 correspond to the guide post hole 7-1, and then insert the guide post 5 into the guide post hole 7-1. At this time, the scanner 14-8 scans the barcode or QR code of the throttle body 1 and feeds back the scanning situation to the PLC, and the PLC determines whether the throttle body 1 is a qualified product to be assembled;

[0109] S04: Through the double start switch, the preparation work is completed. The PLC controls the cylinder 14-7 to run. The cylinder 14-7 drives the positioning mechanism 15 to move backward until it is directly below the pressure head surface 13-2. The PLC then controls the pressure head surface 13-2 and the pressure sensor 13-4 to move downward. The pressure head surface 13-2 presses the pressure head 8 downward. The pressure head 8 presses the shaft sleeve 11 downward until the shaft sleeve 11 is pressed into the shaft sleeve mounting hole 3. At this time, the pressure head surface 13-2, the pressure sensor 13-4 and the pressure head 8 stop moving downward. The pressure sensor 13-4 measures the pressure value at each position during the pressure head 8 pressing process and feeds back the pressure value at each position to the PLC. The PLC determines whether the assembly quality of the shaft sleeve 11 installed in the shaft sleeve mounting hole 3 is qualified. If it is not qualified, the PLC controls the alarm to sound.

[0110] During the downward movement of the pressure head surface 13-2 and the pressure sensor 13-4 controlled by the PLC, the downward movement speed is fast at first and then slow. During the downward movement of the pressing mechanism 13, the speed is fast at first, which is beneficial to improving the efficiency of the press-fitting work, while the speed is slowed down later to protect the sleeve 11, and to prevent the pressure head 8 from causing excessive friction and inertia due to the excessively fast downward pressing speed, thereby crushing the sleeve 11.

[0111] For example, assuming that the distance from the travel switch 14-9 to the pressure head 8 is 100mm, the PLC controls the pressure head surface 13-2 and the pressure sensor 13-4 to move downward through the servo motor 13-1 and the telescopic rod 13-3. In the distance of 80mm below the travel switch 14-9, the pressure head surface 13-2 and the pressure sensor 13-4 maintain a downward movement speed of 2mm / s. Between 80mm and 100mm below the travel switch 14-9 (i.e., the distance where the pressure head surface 13-2 just touches the pressure head 8), the pressure head surface 13-2 and the pressure sensor 13-4 decelerate. When the pressure head surface 13-2 and the pressure sensor 13-4 move down to 100mm, the pressure head surface 13-2 and the pressure sensor 13-4 drop to 1mm / s, and then the pressure head surface 13-2 presses the pressure head 8 downward at a speed of 1mm / s. The telescopic rod 13-3 adopts a screw rod, and the telescopic state is controlled by rotation.

[0112] After the ram 8 completes the press-fitting of the sleeve 11, the PLC controls the ram surface 13-2 and the pressure sensor 13-4 to move upwards, first quickly, and then slowly when approaching the zero point (i.e., approaching the travel switch 14-9) (the specific method can refer to the speed change during the downward movement) to prevent damage to the equipment (especially the travel switch 14-9) due to instantaneous braking after rapid movement.

[0113] The pressure sensor 13-4 and the PLC form a protection mechanism to avoid accidental crushing of the operator. For example, when the pressure head surface 13-2 and the pressure sensor 13-4 maintain a downward movement speed of 2 mm / s (i.e., rapid downward movement), the protection value is 20 kg, that is, when the pressure sensor 13-4 touches a foreign object during the downward movement and the measured pressure value reaches 20 kg or more, the PLC will control the pressure head surface 13-2 and the pressure sensor 13-4 to stop moving downward to avoid crushing the operator; for example, when the pressure head surface 13-2 and the pressure sensor 13-4 maintain a downward movement speed of 1 mm / s (i.e., slow downward movement), the protection value is 500 kg, that is, when the pressure sensor 13-4 touches a foreign object during the downward movement and the measured pressure value reaches 500 kg or more, the PLC will control the pressure head surface 13-2 and the pressure sensor 13-4 to stop moving downward to avoid crushing the operator.

[0114] The way in which the PLC determines whether the assembly quality of the sleeve 11 installed in the sleeve mounting hole 3 is qualified is that the PLC forms a pressure displacement curve L1 according to the pressure value of each position measured by the pressure sensor 13-4 during the pressing process of the pressure head 8, and compares the pressure displacement curve L1 with the pressure displacement upper limit curve L2 and the pressure displacement lower limit curve L3 pre-set in the PLC. If the pressure displacement curve L1 exceeds the pressure displacement upper limit curve L2 or is lower than the pressure displacement lower limit curve L3, it is considered that the assembly quality is unqualified; if the pressure displacement curve L1 is between the pressure displacement upper limit curve L2 and the pressure displacement lower limit curve L3, it is considered that the assembly quality is qualified;

[0115] The pressure displacement curve is displayed by the touch screen display 12-1 to achieve visualization. The PLC can judge whether the press-fitting of the sleeve 11 is qualified through the relationship between the pressure displacement curve L1 and the pressure displacement upper limit curve L2 and the pressure displacement lower limit curve L3, and if the press-fitting of the sleeve 11 is unqualified, predict the reason for the failure.

[0116] for example Fig.17 At this time, the pressure displacement curve L1 (i.e., the detection data line) generated by the press-fitting of the sleeve 11 is all located between the pressure displacement upper limit curve L2 (i.e., the upper tolerance limit) and the pressure displacement lower limit curve L3 (i.e., the lower tolerance limit). At this time, the installation quality of the sleeve 11 is qualified.

[0117] for example Fig.18 At this time, the pressure displacement curve L1 (i.e., the detection data line) generated by the press-fitting of the sleeve 11 is all above the pressure displacement upper limit curve L2 (i.e., the tolerance upper limit). At this time, the installation quality of the sleeve 11 is unqualified, indicating that the interference between the sleeve mounting hole 3 and the sleeve 11 is very large, for example, because the outer diameter of the sleeve 11 is too large or the inner diameter of the main body sleeve mounting hole 3 is too small.

[0118] for example Fig.19At this time, the pressure displacement curve L1 (i.e., the detection data line) generated by the press-fitting of the sleeve 11 is all below the pressure displacement lower limit curve L3 (i.e., the lower limit of the tolerance). At this time, the installation quality of the sleeve 11 is unqualified, indicating that the interference fit between the sleeve 11 and the throttle body 1 is insufficient, for example, because the outer diameter of the sleeve 11 is too small or the inner diameter of the sleeve mounting hole 3 of the throttle body 1 is too large.

[0119] for example Fig. 20 At this time, the pressure displacement curve L1 (i.e., the detection data line) generated by the press-fitting of the sleeve 11 is located above the pressure displacement upper limit curve L2 (i.e., the upper limit of tolerance) in the early stage (i.e., the pressure exceeds the upper limit value at the beginning), and the middle and late stages are located between the pressure displacement upper limit curve L2 (i.e., the upper limit of tolerance) and the pressure displacement lower limit curve L3 (i.e., the lower limit of tolerance). At this time, the installation quality of the sleeve 11 is unqualified, for example, because the sleeve 11 is not properly installed in the sleeve mounting hole 3 before being press-fitted.

[0120] The control mechanism also includes an MES system (not shown in the attached figure, the MES system is a production information management system for the workshop execution layer of a manufacturing enterprise). The PLC feeds back the received information and judgment to the MES system, and reads the preceding process information of the throttle body 1 from the MES system.

[0121] S05: The PLC controls the pressure head surface 13-2 and the pressure sensor 13-4 to move upward until they touch the travel switch 14-9 and then stop moving;

[0122] At this time, the guide column 5 with the sleeve 11 on it passes through the ram stop hole 9, the sleeve mounting hole 3 and the shaft mounting hole 10 in sequence, and is embedded in the guide column hole 7-1 of the support part 7. Then, the ram 8 is embedded in the ram stop hole 9, and the first step portion 8-1 and the second step portion 9-1 are abutted against each other. At this time, the ram 8 and the guide column 5 no longer move downward, and the sleeve 11 is placed on the third step portion 3-1, and the top end face of the sleeve 11 is flush with the second step portion 9-1. After the ram 8 is taken out, the installation of the sleeve 11 and the sleeve mounting hole 3 is completed.

[0123] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A device for mounting a sleeve on a throttle body, the throttle body (1) comprising an air inlet (2) for mounting a throttle plate, the air inlet (2) being provided with a sleeve mounting hole (3), characterized in that: The device comprises a control mechanism, a pressing mechanism (13), a positioning mechanism (15) for fixing a throttle body (1), and a pressing head (8) for pressing a shaft sleeve (11) into a shaft sleeve mounting hole (3) of the throttle body (1); The pressing mechanism (13) comprises a servo motor (13-1), a pressing head surface (13-2) for pressing a pressing head (8) into a shaft sleeve mounting hole (3), a pressure sensor (13-4) for measuring the stress of the pressing head (8), and a telescopic rod (13-3) for driving the pressing head surface (13-2) to press the pressing head (8) into the shaft sleeve mounting hole (3); the servo motor (13-1) drives the telescopic rod (13-3) to move up and down; the bottom of the telescopic rod (13-3) is connected to the pressing head surface (13-2) and the pressure sensor (13-4); and the top of the telescopic rod (13-3) is connected to the servo motor (13-1); The control mechanism controls the servo motor (13-1) to operate, and the pressure sensor (13-4) feeds back the force applied to the pressure head (8) to the control mechanism, and the control mechanism determines whether the throttle body (1) and the shaft sleeve (11) are properly installed; The device also includes a frame (14), a pressing mechanism (13) is fixed above the frame (14), a workbench (14-3) is provided in the middle of the frame (14), a positioning mechanism (15) is provided on the workbench (14-3), and the positioning mechanism (15) is located below the pressing mechanism (13); The positioning mechanism (15) comprises a fixed base (4) and a guide column (5); a vertical fixed plate (6) is provided on the fixed base (4); a support portion (7) is provided on one side of the fixed plate (6); a vertical guide column hole (7-1) is provided in the middle of the support portion (7); the guide column (5) penetrates the shaft sleeve mounting hole (3) and is then embedded in the guide column hole (7-1); The pressure head (8) is cylindrical, the top of the guide column (5) is connected to the center of the bottom of the pressure head (8), the cross-sectional diameter of the pressure head (8) is larger than the cross-sectional diameter of the guide column (5), and the top of the guide column (5) and the bottom of the pressure head (8) form a first step portion (8-1); The bottom of the shaft sleeve mounting hole (3) is connected to the shaft mounting hole (10), and the top of the shaft sleeve mounting hole (3) is connected to the pressure head stop hole (9); the pressure head stop hole (9), the shaft sleeve mounting hole (3) and the shaft mounting hole (10) form a coaxial stepped hole with a diameter decreasing from top to bottom; A second step portion (9-1) is formed between the pressure head stop hole (9) and the shaft sleeve mounting hole (3), and a third step portion (3-1) is formed between the shaft sleeve mounting hole (3) and the shaft mounting hole (10); The diameter of the shaft mounting hole (10) is equal to the diameter of the guide post hole (7-1); There is a clearance fit between the guide post (5) and the guide post hole (7-1); there is a clearance fit between the guide post (5) and the shaft mounting hole (10); There is a clearance fit between the pressure head stop hole (9) and the pressure head (8); The shaft sleeve (11) is sleeved on the guide column (5). When the guide column (5) with the shaft sleeve (11) sleeved thereon passes through the pressure head stop hole (9), the shaft sleeve mounting hole (3) and the shaft mounting hole (10) in sequence and is embedded in the guide column hole (7-1) of the support portion (7), the pressure head (8) is embedded in the pressure head stop hole (9), the first step portion (8-1) and the second step portion (9-1) are abutted against each other, and at this time the shaft sleeve (11) is placed on the third step portion (3-1), and the top end surface of the shaft sleeve (11) is flush with the second step portion (9-1); there is an interference fit between the shaft sleeve (11) and the shaft sleeve mounting hole (3); There is a clearance fit between the shaft sleeve (11) and the guide pillar (5); An NG waste collection box is provided below the workbench (14-3).

2. The device for installing a sleeve on a throttle body according to claim 1, characterized in that: A loading box (14-4) is provided on the workbench (14-3), and a first sensor (14-6) is provided at a material taking port of the loading box (14-4). The first sensor (14-6) monitors the material taking situation of the loading box (14-4) and feeds back to the control mechanism.

3. The device for installing a sleeve on a throttle body according to claim 2, characterized in that: The workbench (14-3) is provided with a plurality of support columns (14-2), and a mounting plate (14-1) for fixing a pressing mechanism (13) is provided on the top of the support columns; a scanning gun (14-8) is provided on one of the support columns (14-2), and the scanning gun (14-8) is used to scan the information of the throttle body (1) and feed back the information of the throttle body (1) to the control mechanism; The device also includes a dual start switch, which is respectively arranged on two support columns (14-2), and the dual start switch feeds back to the control mechanism the readiness of the pressure head (8) equipped with the shaft sleeve (11) to be embedded in the shaft sleeve installation hole (3).

4. The device for installing a sleeve on a throttle body according to claim 3, characterized in that: The control mechanism comprises a PLC, a touch screen display (12-1) and an alarm; the touch screen display (12-1) is arranged above the frame (14), and the touch screen display (12-1) is connected to the PLC; the PLC controls the operation of the alarm; A slide rail (14-5) and a cylinder (14-7) for moving the positioning mechanism (15) forward and backward are provided between the positioning mechanism (15) and the workbench (14-3), and the cylinder (14-7) is operated under the control of a PLC; The pressing mechanism (13) further comprises a travel switch (14-9) for limiting the zero position of the pressure head surface (13-2) and the pressure sensor (13-4); the travel switch (14-9) is arranged at the bottom of the mounting plate (14-1).

5. The device for installing a sleeve on a throttle body according to claim 4, characterized in that: The top of the support portion (7) is arc-shaped, and after the support portion (7) is embedded in the air inlet duct (2), the top of the support portion (7) and the inner wall of the air inlet duct (2) match in shape; The gap between the guide post (5) and the guide post hole (7-1) is 0.02 mm; the gap between the guide post (5) and the shaft mounting hole (10) is 0.02 mm.

6. The device for installing a sleeve on a throttle body according to claim 5, characterized in that: An extension plate (7-2) extending downward is provided at one end of the bottom of the support portion (7) close to the fixing plate (6), and the bottom of the extension plate (7-2) is arc-shaped; An auxiliary plate (6-1) is provided on the side of the fixing plate (6), a circular auxiliary mounting hole (6-2) is provided in the middle of the auxiliary plate (6-1), the support portion (7) passes through the auxiliary mounting hole (6-2) and is connected to the fixing plate (6), and the top and bottom of the support portion (7) are both matched with the auxiliary mounting hole (6-2); The fixing plate (6) is also provided with a rotatable clamping portion (6-3) for clamping the throttle body (1); and a reinforcing plate (4-1) is provided on the other side of the fixing plate (6).

7. A method for using a device for installing a sleeve on a throttle body, which relates to the device for installing a sleeve on a throttle body as claimed in claim 6, and comprises the following specific steps: S01: The shaft sleeve (11) in the loading box (14-4) is taken out, and the first sensor (14-6) senses the removal status of the shaft sleeve (11) and feeds back the status to the PLC; S02: PLC controls the cylinder (14-7) to operate, and the cylinder (14-7) drives the positioning mechanism (15) to move forward from the position directly below the pressing mechanism (13); S03: The shaft sleeve (11) is put on the guide post (5) at the bottom of the pressure head (8), and the air inlet (2) of the throttle body (1) is put on the support part (7) so that the shaft mounting hole (10) and the guide post hole (7-1) correspond to each other, and then the guide post (5) is inserted into the guide post hole (7-1). At this time, the scanning gun (14-8) scans the bar code or QR code of the throttle body (1) and feeds back the scanning situation to the PLC, and the PLC determines whether the throttle body (1) is a qualified product to be assembled; S04: Through the double start switch, the PLC is fed back that the preparation work is completed, and the PLC controls the cylinder (14-7) to operate. The cylinder (14-7) drives the positioning mechanism (15) to move backward until it is located directly below the pressure head surface (13-2). The PLC then controls the pressure head surface (13-2) and the pressure sensor (13-4) to move downward, and the pressure head surface (13-2) presses the pressure head (8) downward. The pressure head (8) and the shaft sleeve (11) are pressed downward until the shaft sleeve (11) is pressed into the shaft sleeve mounting hole (3). At this time, the pressure head surface (13-2), the pressure sensor (13-4) and the pressure head (8) stop moving downward. The pressure sensor (13-4) measures the pressure value at each position during the downward pressing process of the pressure head (8) and feeds back the pressure value at each position to the PLC. The PLC determines whether the assembly quality of the shaft sleeve (11) installed in the shaft sleeve mounting hole (3) is qualified. If it is not qualified, the PLC controls the alarm device to alarm; S05: The PLC controls the pressure head surface (13-2) and the pressure sensor (13-4) to move upward until they touch the travel switch (14-9) and then stop moving; At this time, the guide column (5) on which the shaft sleeve (11) has been put passes through the pressure head stop hole (9), the shaft sleeve mounting hole (3) and the shaft mounting hole (10) in sequence, and is embedded in the guide column hole (7-1) of the support portion (7). Then, the pressure head (8) is embedded in the pressure head stop hole (9), and the first step portion (8-1) and the second step portion (9-1) are abutted against each other. At this time, the pressure head (8) and the guide column (5) no longer move downward, and the shaft sleeve (11) is placed on the third step portion (3-1), and the top end surface of the shaft sleeve (11) is flush with the second step portion (9-1). After the pressure head (8) is taken out, the installation of the shaft sleeve (11) and the shaft sleeve mounting hole (3) is completed.

8. A method for using the device for installing a sleeve on a throttle body according to claim 7, characterized in that: In step S04, the PLC controls the pressure head surface (13-2) and the pressure sensor (13-4) to move downward, and the downward movement speed is first fast and then slow.

9. A method for using the device for installing a sleeve on a throttle body according to claim 7 or 8, characterized in that: In step S04, the PLC determines whether the assembly quality of the shaft sleeve (11) installed in the shaft sleeve mounting hole (3) is qualified in the following manner: the PLC measures the pressure value of each position according to the pressure sensor (13-4) during the downward pressure of the pressure head (8) to form a pressure displacement curve L1, and compares the pressure displacement curve L1 with the pressure displacement upper limit curve L2 and the pressure displacement lower limit curve L3 pre-set in the PLC. If the pressure displacement curve L1 exceeds the pressure displacement upper limit curve L2 or is lower than the pressure displacement lower limit curve L3, it is considered that the assembly quality is unqualified; if the pressure displacement curve L1 is between the pressure displacement upper limit curve L2 and the pressure displacement lower limit curve L3, it is considered that the assembly quality is qualified; The pressure displacement curve is displayed by a touch screen display (12-1); The control mechanism also includes an MES system, and the PLC feeds back the received information and judgment to the MES system, and reads the preceding process information of the throttle body (1) from the MES system; The pressure sensor (13-4) and the PLC form a protection mechanism; The PLC determines whether the press-fitting of the shaft sleeve (11) is qualified through the relationship between the pressure displacement curve L1 and the pressure displacement upper limit curve L2 and the pressure displacement lower limit curve L3, and if it is unqualified, the reason for the unqualified is predicted.

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