Synchronous tightening device for high-pressure common rail pump and using method of synchronous tightening device

Abstract

The invention discloses a high-pressure common rail pump synchronous tightening device and a using method thereof, and belongs to the technical field of high-pressure common rail pumps. The device is used for fixing an electromagnetic valve on a pump body, and two main stations are arranged in the device and are respectively used for oil dripping and installation height detection of the electromagnetic valve and synchronous screwing of screws; the oil dripping mechanism and the height detection mechanism of the first station ensure that the electromagnetic valve is correctly positioned, and the tightening mechanism of the second station achieves accurate and synchronous tightening of screws through a servo driving motor and a torque sensor. The using method comprises a series of automatic operation steps, and through feedback circulation of the sensor, the accuracy and rapidity of installation of the electromagnetic valve are guaranteed. According to the device, the production efficiency is improved, the labor cost is reduced, and the high-precision installation standard can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of high-pressure common rail pumps, and more specifically, to a synchronous tightening device for a high-pressure common rail pump and a use method thereof. Background Art

[0002] As a key component in the diesel engine fuel injection system, the performance of the high-pressure common rail pump has a direct impact on the overall working state of the diesel engine. During the assembly process of the high-pressure common rail pump, the installation and tightening of the solenoid valve are particularly important, because the solenoid valve is an important component for controlling fuel injection, and its installation quality directly affects the accuracy of fuel injection and the operating performance of the diesel engine.

[0003] At present, the traditional tightening method is widely used in the industry, usually by manually controlling the torque of the screw to fix the solenoid valve. However, this manual tightening method has several shortcomings. Since it is difficult to accurately control the manual tightening torque, the operator can easily cause the tightening torque to be too large or too small due to improper operation, thus affecting the installation quality.

[0004] Especially in terms of speed control, manual operation places high demands on the operator's experience and reaction speed. This method easily leads to the problem of not stopping tightening in time, resulting in excessive torque. In addition, since manual tightening is difficult to accurately control the speed, it is easy to produce a large impact when the screw contacts the fitting surface, which may not only lead to tightening failure, but also affect the overall assembly efficiency.

[0005] In addition, the manual tightening method lacks universality in different workpieces and applications, and requires operators to adjust and set according to specific circumstances, which increases the difficulty and uncertainty of operation. Therefore, in view of these shortcomings, it is necessary to develop a more reliable and efficient tightening method to improve the reliability of solenoid valve installation. Summary of the invention

[0006] In order to overcome the technical problems in the prior art, the present invention provides a high-pressure common rail pump synchronous tightening device and a use method thereof.

[0007] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0008] A synchronous tightening device for a high-pressure common rail pump, the high-pressure common rail pump comprising a pump body and a solenoid valve, the synchronous tightening device for the high-pressure common rail pump being used to tighten a plurality of screws that fix the solenoid valve on the pump body;

[0009] The high-pressure common rail pump synchronous tightening device is provided with a first station and a second station in sequence along a first direction; the first station is provided with a first machine base, and the second station is provided with a second machine base; the pump body is fixed on a tooling base, and the tooling base is placed on a conveyor belt and passes through the first station and the second station in sequence through the conveyor belt;

[0010] The first station is used to drip oil on the solenoid valve, and after the solenoid valve after dripping oil is placed at the solenoid valve installation position on the pump body, the height of the top of the solenoid valve is detected to determine whether the solenoid valve after dripping oil is correctly placed at the solenoid valve installation position on the pump body;

[0011] An oil dripping mechanism and a height detection mechanism are installed on the first base; the oil dripping mechanism includes an oil dripper, and the oil dripper is configured to drip oil to the solenoid valve; the height detection mechanism includes a height sensor, and the height sensor is configured to detect the height of the top of the solenoid valve placed on the pump body;

[0012] The second station is used to synchronously screw a plurality of screws to fix the solenoid valve on the pump body;

[0013] A tightening mechanism is installed on the second machine base, and the tightening mechanism is slidably connected to the guide rail through a mounting frame. A first lifting cylinder is installed on the guide rail, and a driving end of the first lifting cylinder is connected to the mounting frame. The first lifting cylinder is configured to drive the tightening mechanism to lift and lower; the tightening mechanism includes a plurality of screw tightening units, and the number of the screw tightening units is consistent with the number of the screws; each of the screw tightening units includes a servo drive motor, a motor brake, a torque sensor, a connecting shaft, a screw bit telescopic sleeve and a screw bit connected in sequence from top to bottom, and the screw bit is used to be inserted into the groove of the screw head to rotate the screw.

[0014] Further, the mounting frame includes a side plate, a lifting plate and a lifting plate sub-plate, the side plate is slidably connected to the guide rail, and the lifting plate and the lifting plate sub-plate are respectively fixedly connected to the upper and lower ends of the side plate;

[0015] The torque sensor is installed on the top of the lifting plate, the connecting shaft is located between the lifting plate and the lifting plate sub-plate, the upper end of the connecting shaft passes through the lifting plate and is connected to the torque sensor, and the lower end of the connecting shaft passes through the lifting plate sub-plate and is connected to the screwdriver bit telescopic sleeve.

[0016] Furthermore, a position adjustment mechanism is installed on the first machine base, and the position adjustment mechanism includes a longitudinal cylinder, a push slider, a guide plate, a mounting plate, and a transverse cylinder;

[0017] A first guide rail is provided at the top of the first machine base, the push slider is slidably connected to the first guide rail, the longitudinal cylinder is installed at the top of the first machine base, and the longitudinal cylinder is configured to drive the push slider to move along a second direction, and the second direction is perpendicular to the first direction on a horizontal plane;

[0018] The guide plate is fixedly mounted on the top of the push slider, a second guide rail is provided on the guide plate, the mounting plate is slidably connected to the second guide rail, the transverse cylinder is mounted on the guide plate, the transverse cylinder is configured to drive the mounting plate to move along the first direction, and the oil dripping mechanism and the height detection mechanism are both mounted on the mounting plate.

[0019] Furthermore, a third vertical guide rail is provided on the mounting plate;

[0020] The oil dripping mechanism includes an oil dripping lifting plate, which is slidably mounted on the third guide rail, the oil dripper is mounted on the oil dripping lifting plate, a second lifting cylinder is fixedly mounted on the mounting plate, a driving end of the second lifting cylinder is connected to the oil dripping lifting plate, and the second lifting cylinder is configured to drive the oil dripping lifting plate to rise and fall along the third guide rail.

[0021] Furthermore, a fourth vertical guide rail is provided on the mounting plate;

[0022] The height detection mechanism includes a detection lifting plate, the detection lifting plate is slidably mounted on the fourth guide rail, a third lifting cylinder is fixedly mounted on the mounting plate, a driving end of the third lifting cylinder is connected to the detection lifting plate, and the third lifting cylinder is configured to drive the detection lifting plate to move up and down along the fourth guide rail;

[0023] A horizontal mounting panel is fixedly connected to the lifting plate, a through hole is provided on the mounting panel, a detection slide shaft is slidably mounted in the through hole, and the detection slide shaft is configured to be able to be lifted up by the solenoid valve located below the detection slide shaft when the detection lifting plate is lowered; the height sensor is located above the detection slide shaft, and is used for detecting the height to which the detection slide shaft is lifted.

[0024] Furthermore, the high-pressure common rail pump synchronous tightening device also includes a control box and an electrical box, wherein the electrical box is electrically connected to the control box to provide power to the control box;

[0025] The control box is electrically connected to the servo drive motor to control the working state of the servo drive motor; the control box is electrically connected to the torque sensor to receive the detection data of the torque sensor; the control box is electrically connected to the motor brake to control the start and stop of the motor brake; the control box is electrically connected to the oil dripper to control the working state of the oil dripper; the control box is electrically connected to the height sensor to receive the measurement data of the height sensor.

[0026] Furthermore, the high-pressure common rail pump synchronous tightening device further comprises a machine frame, in which a mounting platform is arranged, and the first station and the second station are arranged on the mounting platform in sequence along the first direction;

[0027] A viewing window is detachably mounted on the machine frame, and the viewing window includes two window doors, and both window doors are rotatably connected to the machine frame;

[0028] The control box is fixedly mounted on the side of the machine frame;

[0029] The oil dripping mechanism further includes a proximity sensor, the control box is electrically connected to the proximity sensor, and the proximity sensor is used to send a signal to the control box when an object approaches the oil dripper; the control box is configured to control the oil dripper to drip oil after receiving the signal from the proximity sensor;

[0030] The tightening mechanism further includes a position sensor, which is used to detect whether the position of the solenoid valve is at a predetermined position; the control box is electrically connected to the position sensor to receive measured data of the position sensor;

[0031] The machine frame is provided with a plurality of material channels, and the material channels are used to place turnover boxes; the machine frame is provided with at least one iron material box on its edge portion close to the installation platform.

[0032] Furthermore, a three-color light is installed on the top of the machine frame, and the three-color light is electrically connected to the control box to receive a status signal from the control box.

[0033] A method for using a synchronous tightening device for a high-pressure common rail pump comprises the following steps:

[0034] Move the pump body to the bottom of the oil dripper through a conveyor belt;

[0035] Detecting whether the pump body below the oil dripper is in place by a proximity sensor;

[0036] When the proximity sensor detects that the pump body is in place, the oil dripper is controlled to drip oil to the installation position of the solenoid valve on the pump body; when the proximity sensor detects that the pump body is not in place, the operation of moving the pump body to the bottom of the oil dripper is repeated until the proximity sensor detects that the pump body is in place;

[0037] After the oil dripper drips oil to the electromagnetic valve installation position on the pump body, an O-ring is installed at the electromagnetic valve installation position on the pump body;

[0038] After installing the O-ring at the solenoid valve installation position on the pump body, press the solenoid valve into the solenoid valve installation position on the pump body, and place a screw in each screw hole on the solenoid valve;

[0039] The pump body pressed into the solenoid valve is moved to the bottom of the height detection mechanism, and the height detection mechanism is controlled to descend to a predetermined height by the third lifting cylinder, so that the solenoid valve lifts up the detection slide shaft in the height detection mechanism, and the height of the detection slide shaft being lifted up is detected by the height sensor to determine whether the solenoid valve is installed in place;

[0040] When the solenoid valve is installed in place, the pump body pressed into the solenoid valve is moved to a predetermined position below the tightening mechanism; when the solenoid valve is not installed in place, the O-ring is reinstalled at the solenoid valve installation position on the pump body, the solenoid valve is pressed into the solenoid valve installation position on the pump body, and a screw is placed in each screw hole on the solenoid valve until the solenoid valve is installed in place;

[0041] Detecting by a position sensor whether the pump body pressed into the solenoid valve moves to a predetermined position below the tightening mechanism;

[0042] When it is detected that the pump body pressed into the solenoid valve moves to a predetermined position below the tightening mechanism, the tightening mechanism is controlled to descend to a preset height by a first lifting cylinder; when it is detected that the pump body pressed into the solenoid valve does not move to the predetermined position below the tightening mechanism, the operation of moving the pump body pressed into the solenoid valve to the predetermined position below the tightening mechanism is repeated until the pump body pressed into the solenoid valve correctly moves to the predetermined position below the tightening mechanism;

[0043] Synchronously tightening the screws placed in each screw hole on the solenoid valve by means of the tightening mechanism;

[0044] Detecting the torque of the tightening mechanism tightening the screw on the solenoid valve by means of a torque sensor;

[0045] When the torque detected by the torque sensor is within the preset torque threshold range, the synchronous tightening operation of the screws is completed; when the torque detected by the torque sensor is not within the preset torque threshold range, the operation of the tightening mechanism synchronously tightening the screws placed in each screw hole on the solenoid valve is repeated until the torque detected by the torque sensor is within the preset torque threshold range.

[0046] Further, the step of synchronously tightening the screws placed in each screw hole on the solenoid valve by the tightening mechanism specifically includes:

[0047] Starting the pre-tightening operation of the tightening mechanism, driving the screwdriver bit in the tightening mechanism to rotate forwardly, so as to apply torque to the screws placed in each screw hole on the solenoid valve until a predetermined pre-tightening torque is reached; when the pre-tightening torque is reached, the tightening mechanism stops the tightening action;

[0048] Starting the retraction operation of the tightening mechanism to drive the screwdriver bit in the tightening mechanism to rotate in the opposite direction to release the pre-tightening force of the screw;

[0049] The fixed torque operation of the tightening mechanism is started, and the screwdriver bit in the tightening mechanism is driven to rotate forward to apply torque to the screws placed in each screw hole on the solenoid valve until a predetermined tightening torque is reached, thereby completing the synchronous tightening operation of the screws placed in each screw hole on the solenoid valve.

[0050] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0051] The high-pressure common rail pump synchronous tightening device and its use method of the present invention significantly improve the efficiency and accuracy of solenoid valve installation through standardized and automated operating steps. The device achieves torque accuracy deviation control within 0-0.2Nm, reduces installation time to 60 seconds, greatly reduces labor costs, and ensures the sealing performance and three-coordinate accuracy of the solenoid valve. These improvements ensure that the assembly process is fast and reliable, while maintaining the consistency of installation quality and product performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0053] Figure 1 It is a schematic diagram of the overall structure of a synchronous tightening device for a high-pressure common rail pump provided in one embodiment of the present application;

[0054] Figure 2 This is a schematic structural diagram of a high-pressure common rail pump synchronous tightening device provided in one embodiment of the present application after a portion of the machine frame is removed;

[0055] Figure 3 It is a structural schematic diagram of a second machine base in a synchronous tightening device for a high-pressure common rail pump provided in one embodiment of the present application;

[0056] Figure 4 It is a structural schematic diagram of a first machine base in a synchronous tightening device for a high-pressure common rail pump provided in one embodiment of the present application;

[0057] Figure 5 is a flow chart of a method for using a synchronous tightening device for a high-pressure common rail pump provided in one embodiment of the present application;

[0058] Description of the markings in the figure:

[0059] 1. Machine frame;

[0060] 2. Pump body; 21. Solenoid valve;

[0061] 3. Tooling base; 4. Turnover box; 5. Viewing window; 6. Operation box; 7. Material channel; 8. Iron material box; 9. Electrical box;

[0062] 10. Tightening mechanism; 101. Tightening rod; 1011. Bit; 1012. Bit telescopic sleeve; 102. Lifting plate sub-plate; 103. Connecting shaft; 104. Lifting plate; 105. Torque sensor; 106. Motor brake; 107. Servo drive motor;

[0063] 11. first pneumatic module; 111. first lifting cylinder; 112. guide rail;

[0064] 12. Oil dripping mechanism; 121. Second lifting cylinder; 122. Oil dripping lifting plate; 123. Oil dripper;

[0065] 13. Height detection mechanism; 131. Third lifting cylinder; 132. Detection lifting plate; 133. Height sensor; 134. Detection slide shaft;

[0066] 14. Second pneumatic module; 141. Mounting plate; 142. Transverse cylinder; 143. Longitudinal cylinder; 144. Push slider;

[0067] 15. First base; 16. Second base; 17. Three-color light. DETAILED DESCRIPTION

[0068] In order to better understand the purpose, structure and function of the present invention, the technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0069] In the description of the present invention, it should be understood that the terms "left side", "right side", "upper part", "lower part", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not indicate the importance of the parts, and therefore cannot be understood as a limitation on the present invention. The specific dimensions used in the embodiments are only for illustrating the technical solution and do not limit the scope of protection of the present invention. It is understandable to those skilled in the art that some well-known structures and their descriptions in the drawings may be omitted.

[0070] Unless otherwise clearly specified and limited, the terms "install", "set", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0071] Embodiment 1:

[0072] like Figure 1-4 As shown, the present invention provides a technical solution:

[0073] A synchronous tightening device for a high-pressure common rail pump, the high-pressure common rail pump comprising a pump body 2 and a solenoid valve 21, the synchronous tightening device for a high-pressure common rail pump being used to tighten a plurality of screws that fix the solenoid valve 21 on the pump body 2;

[0074] The high-pressure common rail pump synchronous tightening device is provided with a first station and a second station in sequence along a first direction; the first station is provided with a first machine base 15, and the second station is provided with a second machine base 16; the pump body 2 is fixed on a tooling base 3, and the tooling base 3 is placed on a conveyor belt and passes through the first station and the second station in sequence through the conveyor belt;

[0075] The first station is used to drip oil on the solenoid valve 21, and after the solenoid valve 21 after dripping oil is placed at the solenoid valve installation position on the pump body 2, the height of the top of the solenoid valve 21 is detected to determine whether the solenoid valve 21 after dripping oil is correctly placed at the solenoid valve installation position on the pump body 2;

[0076] The first base 15 is provided with an oil dripping mechanism 12 and a height detection mechanism 13; the oil dripping mechanism 12 includes an oil dripper 123, and the oil dripper 123 is configured to drip oil to the solenoid valve 21; the height detection mechanism 13 includes a height sensor 133, and the height sensor 133 is configured to detect the height of the top of the solenoid valve 21 placed on the pump body 2, that is, the height detection mechanism 13 is used to detect the height of the solenoid valve 21 after being installed on the pump body 2;

[0077] The height sensor 133 is a commercially available product, and its specific structure and working principle are not described here in detail;

[0078] The second station is used to synchronously tighten a plurality of screws to fix the solenoid valve 21 on the pump body 2;

[0079] A tightening mechanism 10 is installed on the second machine base 16, and the tightening mechanism 10 is slidably connected to the guide rail 112 through a mounting frame, and a first lifting cylinder 111 is installed on the guide rail 112, and the driving end of the first lifting cylinder 111 is connected to the mounting frame, and the first lifting cylinder 111 is configured to drive the tightening mechanism 10 to move up and down; the tightening mechanism 10 includes a plurality of screw tightening units, and the number of the screw tightening units is consistent with the number of the screws; each of the screw tightening units includes a servo drive motor 107, a motor brake 106, a torque sensor 105, a connecting shaft 103, a screw head telescopic sleeve 1012 and a screw head 1011 connected in sequence from top to bottom, and the screw head 1011 is used to be inserted into the groove of the screw head to rotate the screw;

[0080] The servo drive motor 107 is used to provide the speed and torque required for tightening the screw;

[0081] The torque sensor 105 is used to collect the motor torque output and control the torque output;

[0082] The connecting shaft 103 is used for torque transmission;

[0083] The screwdriver bit 1011 is used to connect the screw holes;

[0084] The servo drive motor 107 is installed above the torque sensor 105 , the connecting shaft 103 is installed below the torque sensor 105 , the screwdriver bit 1011 is installed below the connecting shaft 103 , and the torque sensor 105 is installed on a mounting frame on the second machine base 16 .

[0085] This embodiment improves accuracy and reliability through the automation of oil dripping operation, height detection, and synchronous tightening of screws; it improves the overall efficiency of the production line, reduces manual intervention, and reduces the risk of misinstallation and improper tightening. At the same time, through torque sensor monitoring, it ensures that the torque of each connection point accurately meets the specified standard.

[0086] Embodiment 2:

[0087] Based on Example 1, Figure 1-4 The mounting frame includes a side plate, a lifting plate 104 and a lifting plate sub-plate 102, the side plate is slidably connected to the guide rail 112, and the lifting plate 104 and the lifting plate sub-plate 102 are respectively fixedly connected to the upper and lower ends of the side plate;

[0088] The torque sensor 105 is installed on the top of the lifting plate 104, the connecting shaft 103 is located between the lifting plate 104 and the lifting plate sub-plate 102, the upper end of the connecting shaft 103 passes through the lifting plate 104 and is connected to the torque sensor 105, and the lower end of the connecting shaft 103 passes through the lifting plate sub-plate 102 and is connected to the screwdriver bit telescopic sleeve 1012.

[0089] Furthermore, a position adjustment mechanism is installed on the first base 15, and the position adjustment mechanism includes a longitudinal cylinder 143, a push slider 144, a guide plate, a mounting plate 141, and a transverse cylinder 142;

[0090] A first guide rail is provided at the top of the first machine base 15, the push slider 144 is slidably connected to the first guide rail, the longitudinal cylinder 143 is installed at the top of the first machine base 15, and the longitudinal cylinder 143 is configured to drive the push slider 144 to move along a second direction, which is perpendicular to the first direction on a horizontal plane;

[0091] The guide plate is fixedly mounted on the top of the push slider 144, a second guide rail is provided on the guide plate, the mounting plate 141 is slidably connected to the second guide rail, the transverse cylinder 142 is mounted on the guide plate, the transverse cylinder 142 is configured to drive the mounting plate 141 to move along the first direction, and the oil dripping mechanism 12 and the height detection mechanism 13 are both mounted on the mounting plate 141.

[0092] Furthermore, a third vertical guide rail is provided on the mounting plate 141;

[0093] The oil dripping mechanism 12 includes an oil dripping lifting plate 122, which is slidably mounted on the third guide rail, and the oil dripper 123 is mounted on the oil dripping lifting plate 122. A second lifting cylinder 121 is fixedly mounted on the mounting plate 141, and a driving end of the second lifting cylinder 121 is connected to the oil dripping lifting plate 122. The second lifting cylinder 121 is configured to drive the oil dripping lifting plate 122 to rise and fall along the third guide rail.

[0094] Furthermore, a fourth vertical guide rail is provided on the mounting plate 141;

[0095] The height detection mechanism 13 includes a detection lifting plate 132, which is slidably mounted on the fourth guide rail, and a third lifting cylinder 131 is fixedly mounted on the mounting plate 141, and a driving end of the third lifting cylinder 131 is connected to the detection lifting plate 132, and the third lifting cylinder 131 is configured to drive the detection lifting plate 132 to move up and down along the fourth guide rail;

[0096] A horizontal mounting panel is fixedly connected to the lifting plate 132, and a through hole is provided on the mounting panel. A detection slide shaft 134 is slidably installed in the through hole. The detection slide shaft 134 is configured to be lifted up by the solenoid valve 21 located below the detection slide shaft 134 when the detection lifting plate 132 is lowered; the height sensor 133 is located above the detection slide shaft 134, and is used to detect the height to which the detection slide shaft 134 is lifted up.

[0097] Furthermore, the height detection mechanism 13 and the oil dripping mechanism 12 are both mounted on the mounting plate 141 , and their left-right positional relationship can be swapped, that is, the height detection mechanism 13 can be on the left side of the oil dripping mechanism 12 or on the right side of the oil dripping mechanism 12 .

[0098] Furthermore, the high-pressure common rail pump synchronous tightening device also includes a control box 6 and an electrical box 9, wherein the electrical box 9 is electrically connected to the control box 6 to provide power to the control box 6;

[0099] The control box 6 is electrically connected to the servo drive motor 107 to control the working state of the servo drive motor 107; the control box 6 is electrically connected to the torque sensor 105 to receive the detection data of the torque sensor 105; the control box 6 is electrically connected to the motor brake 106 to control the start and stop of the motor brake 106; the control box 6 is electrically connected to the oil dripper 123 to control the working state of the oil dripper 123; the control box 6 is electrically connected to the height sensor 133 to receive the measurement data of the height sensor 133.

[0100] Furthermore, the high-pressure common rail pump synchronous tightening device further comprises a machine frame 1, wherein a mounting platform is disposed in the machine frame 1, and the first station and the second station are sequentially disposed on the mounting platform along the first direction;

[0101] The machine frame 1 is detachably provided with a viewing window 5, wherein the viewing window 5 comprises two window doors, and both window doors are rotatably connected to the machine frame 1;

[0102] The control box 6 is fixedly mounted on the side of the machine frame 1;

[0103] The oil dripping mechanism 12 further includes a proximity sensor, the control box 6 is electrically connected to the proximity sensor, and the proximity sensor is used to send a signal to the control box 6 when an object approaches the oil dripper 123; the control box 6 is configured to control the oil dripper 123 to drip oil after receiving the signal from the proximity sensor;

[0104] The tightening mechanism 10 further includes a position sensor, which is used to detect whether the position of the solenoid valve 21 is at a predetermined position; the control box 6 is electrically connected to the position sensor to receive measured data of the position sensor;

[0105] The machine frame 1 is provided with a plurality of material channels 7 for placing turnover boxes 4 ; the machine frame 1 is provided with at least one iron material box 8 at its edge portion close to the mounting platform.

[0106] Furthermore, the control box 6 is provided with an industrial control screen, and the industrial control screen is used to display information such as torque.

[0107] Furthermore, the control box 6 is electrically connected to the first lifting cylinder 111, the second lifting cylinder 121, the third lifting cylinder 131, the transverse cylinder 142, and the longitudinal cylinder 143, respectively, so as to control the actions of the first lifting cylinder 111, the second lifting cylinder 121, the third lifting cylinder 131, the transverse cylinder 142, and the longitudinal cylinder 143, respectively.

[0108] Further, the first lifting cylinder 111 and the guide rail 112 form a first pneumatic module 11;

[0109] The mounting plate 141, the transverse cylinder 142, the longitudinal cylinder 143, and the push slider 144 constitute a second pneumatic module 14;

[0110] The screwdriver bit 1011 and the screwdriver bit telescopic sleeve 1012 constitute a tightening rod 101 .

[0111] Furthermore, the solenoid valve 21 is a ZME solenoid valve.

[0112] Furthermore, a three-color light 17 is installed on the top of the machine frame 1 , and the three-color light 17 is electrically connected to the control box 6 to receive a status signal from the control box 6 .

[0113] Embodiment 3:

[0114] like Figure 1-5 As shown, the present invention provides a technical solution:

[0115] A method for using a synchronous tightening device for a high-pressure common rail pump comprises the following steps:

[0116] The pump body 2 is moved to the bottom of the oil dripper 123 by a conveyor belt;

[0117] Detect whether the pump body 2 below the oil dripper 123 is in place by a proximity sensor;

[0118] When the proximity sensor detects that the pump body 2 is in place, the oil dripper 123 is controlled to drip oil to the electromagnetic valve installation position on the pump body 2; when the proximity sensor detects that the pump body 2 is not in place, the operation of moving the pump body 2 to the bottom of the oil dripper 123 is repeated until the proximity sensor detects that the pump body 2 is in place;

[0119] After the oil dripper 123 drips oil to the solenoid valve installation position on the pump body 2, an O-ring is installed at the solenoid valve installation position on the pump body 2 manually or by automated equipment;

[0120] After installing the O-ring at the solenoid valve installation position on the pump body 2, press the solenoid valve 21 into the solenoid valve installation position on the pump body 2 manually or automatically, and place a screw in each screw hole on the solenoid valve 21 manually or automatically;

[0121] The pump body 2 pressed into the solenoid valve 21 is moved to the bottom of the height detection mechanism 13, and the height detection mechanism 13 is controlled to descend to a predetermined height by the third lifting cylinder 131, so that the solenoid valve 21 lifts up the detection slide shaft 134 in the height detection mechanism 13, and the height of the detection slide shaft 134 is detected by the height sensor 133 to determine whether the solenoid valve 21 is installed in place;

[0122] When the solenoid valve 21 is installed in place, the pump body 2 pressed into the solenoid valve 21 is moved to a predetermined position below the tightening mechanism 10; when the solenoid valve 21 is not installed in place, the O-ring is reinstalled at the solenoid valve installation position on the pump body 2, the solenoid valve 21 is pressed into the solenoid valve installation position on the pump body 2, and a screw is placed in each screw hole on the solenoid valve 21 until the solenoid valve 21 is installed in place;

[0123] Detecting by a position sensor whether the pump body 2 pressed into the solenoid valve 21 moves to a predetermined position below the tightening mechanism 10;

[0124] When it is detected that the pump body 2 pressed into the solenoid valve 21 moves to a predetermined position below the tightening mechanism 10, the tightening mechanism 10 is controlled to descend to a preset height by the first lifting cylinder 111; when it is detected that the pump body 2 pressed into the solenoid valve 21 does not move to the predetermined position below the tightening mechanism 10, the operation of moving the pump body 2 pressed into the solenoid valve 21 to the predetermined position below the tightening mechanism 10 is repeated until the pump body 2 pressed into the solenoid valve 21 correctly moves to the predetermined position below the tightening mechanism 10;

[0125] Synchronously tightening the screws placed in each screw hole on the solenoid valve 21 through the tightening mechanism 10;

[0126] The torque of the tightening mechanism 10 tightening the screw on the solenoid valve 21 is detected by the torque sensor 105;

[0127] When the torque detected by the torque sensor 105 is within the preset torque threshold range, the synchronous tightening operation of the screws is completed; when the torque detected by the torque sensor 105 is not within the preset torque threshold range, the tightening mechanism 10 repeats the operation of synchronously tightening the screws placed in each screw hole on the solenoid valve 21 until the torque detected by the torque sensor 105 is within the preset torque threshold range.

[0128] This embodiment achieves accurate and error-free installation operations through the integration of detailed operation steps and adaptive control systems. The automated and intelligent operation process greatly improves the overall efficiency and safety of equipment operation, reduces potential errors caused by manual intervention, and equipment operators only need a small amount of training to complete complex operations, which greatly saves human resources.

[0129] Embodiment 4:

[0130] Based on Example 3, Figure 1-5 The method of synchronously tightening the screws placed in each screw hole on the solenoid valve 21 by the tightening mechanism 10 specifically includes:

[0131] Starting the pre-tightening operation of the tightening mechanism 10, driving the screwdriver bit 1011 in the tightening mechanism 10 to rotate forwardly, so as to apply torque to the screws placed in each screw hole on the solenoid valve 21, until a predetermined pre-tightening torque is reached; when the pre-tightening torque is reached, the tightening mechanism 10 stops the tightening action;

[0132] The retraction operation of the tightening mechanism 10 is started to drive the screwdriver bit 1011 in the tightening mechanism 10 to rotate in the reverse direction to release the pre-tightening force of the screw; the screwdriver bit 1011 rotates in the reverse direction to a preset reverse rotation angle and then stops to prevent excessive loosening;

[0133] The fixed torque operation of the tightening mechanism 10 is started, and the screwdriver bit 1011 in the tightening mechanism 10 is driven to rotate forward to apply torque to the screws placed in each screw hole on the solenoid valve 21 until a predetermined tightening torque is reached, thereby completing the synchronous tightening operation of the screws placed in each screw hole on the solenoid valve 21.

[0134] Furthermore, the solenoid valve 21 is provided with three screw holes for connecting to the pump body 2, and a screw is placed in each screw hole.

[0135] The technical solution of this embodiment can control the torque accuracy deviation of the solenoid valve 21 installation within 0-0.2Nm, and the entire installation process takes only 60 seconds, which greatly reduces the installation and testing time. At the same time, the solenoid valve sealing ring remains intact after installation, and the roundness values ​​are compared by three-coordinate measurement before and after installation, with only a 1μm change. These subtle differences will not affect the performance of the solenoid valve 21.

[0136] This embodiment significantly improves the reliability and stability of installation through multi-stage screw tightening operations, ensures that the torque reaches the design standard, and makes the sealing performance of the solenoid valve more ideal. At the same time, the equipment is easy to operate, further improving the efficiency and safety of the production line.

[0137] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A synchronous tightening device for a high-pressure common rail pump, characterized in that: The high-pressure common rail pump comprises a pump body (2) and a solenoid valve (21), and the high-pressure common rail pump synchronous tightening device is used to tighten a plurality of screws that fix the solenoid valve (21) on the pump body (2); The high-pressure common rail pump synchronous tightening device is provided with a first station and a second station in sequence along a first direction; the first station is provided with a first machine base (15), and the second station is provided with a second machine base (16); the pump body (2) is fixed on a tooling base (3), and the tooling base (3) is placed on a conveyor belt and passes through the first station and the second station in sequence through the conveyor belt; The first station is used to drip oil on the solenoid valve (21), and after the solenoid valve (21) after dripping oil is placed at the solenoid valve installation position on the pump body (2), the height of the top of the solenoid valve (21) is detected to determine whether the solenoid valve (21) after dripping oil is correctly placed at the solenoid valve installation position on the pump body (2); An oil dripping mechanism (12) and a height detection mechanism (13) are mounted on the first base (15); the oil dripping mechanism (12) comprises an oil dripper (123), and the oil dripper (123) is configured to drip oil to the solenoid valve (21); the height detection mechanism (13) comprises a height sensor (133), and the height sensor (133) is configured to detect the height of the top end of the solenoid valve (21) placed on the pump body (2); The second station is used to synchronously screw a plurality of screws to fix the solenoid valve (21) on the pump body (2); A tightening mechanism (10) is installed on the second machine base (16), and the tightening mechanism (10) is slidably connected to the guide rail (112) through a mounting frame, and a first lifting cylinder (111) is installed on the guide rail (112), and the driving end of the first lifting cylinder (111) is connected to the mounting frame, and the first lifting cylinder (111) is configured to drive the tightening mechanism (10) to move up and down; the tightening mechanism (10) includes a plurality of screw tightening units, and the number of the screw tightening units is consistent with the number of the screws; each of the screw tightening units includes a servo drive motor (107), a motor brake (106), a torque sensor (105), a connecting shaft (103), a screw head telescopic sleeve (1012) and a screw head (1011) connected in sequence from top to bottom, and the screw head (1011) is used to be inserted into the groove of the screw head to rotate the screw.

2. The synchronous tightening device for a high-pressure common rail pump according to claim 1, characterized in that: The mounting frame comprises a side plate, a lifting plate (104) and a lifting plate sub-plate (102); the side plate is slidably connected to the guide rail (112); the lifting plate (104) and the lifting plate sub-plate (102) are respectively fixedly connected to the upper and lower ends of the side plate; The torque sensor (105) is installed on the top of the lifting plate (104), the connecting shaft (103) is located between the lifting plate (104) and the lifting plate sub-plate (102), the upper end of the connecting shaft (103) passes through the lifting plate (104) and is connected to the torque sensor (105), and the lower end of the connecting shaft (103) passes through the lifting plate sub-plate (102) and is connected to the screwdriver bit telescopic sleeve (1012).

3. The synchronous tightening device for a high-pressure common rail pump according to claim 1, characterized in that: A position adjustment mechanism is installed on the first machine base (15), and the position adjustment mechanism includes a longitudinal cylinder (143), a push slider (144), a guide plate, a mounting plate (141), and a transverse cylinder (142); A first guide rail is provided at the top of the first machine base (15), the push slider (144) is slidably connected to the first guide rail, the longitudinal movement cylinder (143) is installed at the top of the first machine base (15), and the longitudinal movement cylinder (143) is configured to drive the push slider (144) to move along a second direction, and the second direction is perpendicular to the first direction on a horizontal plane; The guide plate is fixedly mounted on the top of the push slider (144), a second guide rail is provided on the guide plate, the mounting plate (141) is slidably connected to the second guide rail, the transverse cylinder (142) is mounted on the guide plate, the transverse cylinder (142) is configured to drive the mounting plate (141) to move along the first direction, and the oil dripping mechanism (12) and the height detection mechanism (13) are both mounted on the mounting plate (141).

4. The synchronous tightening device for a high-pressure common rail pump according to claim 3, characterized in that: The mounting plate (141) is provided with a vertical third guide rail; The oil dripping mechanism (12) comprises an oil dripping lifting plate (122), the oil dripping lifting plate (122) is slidably mounted on the third guide rail, the oil dripper (123) is mounted on the oil dripping lifting plate (122), a second lifting cylinder (121) is fixedly mounted on the mounting plate (141), a driving end of the second lifting cylinder (121) is connected to the oil dripping lifting plate (122), and the second lifting cylinder (121) is configured to drive the oil dripping lifting plate (122) to rise and fall along the third guide rail.

5. The synchronous tightening device for a high-pressure common rail pump according to claim 3, characterized in that: The mounting plate (141) is provided with a fourth vertical guide rail; The height detection mechanism (13) comprises a detection lifting plate (132), the detection lifting plate (132) is slidably mounted on the fourth guide rail, a third lifting cylinder (131) is fixedly mounted on the mounting plate (141), a driving end of the third lifting cylinder (131) is connected to the detection lifting plate (132), and the third lifting cylinder (131) is configured to drive the detection lifting plate (132) to move up and down along the fourth guide rail; A horizontal mounting panel is fixedly connected to the lifting plate (132), and a through hole is provided on the mounting panel. A detection slide shaft (134) is slidably mounted in the through hole. The detection slide shaft (134) is configured to be able to be lifted up by the solenoid valve (21) located below the detection slide shaft (134) when the detection lifting plate (132) is lowered; the height sensor (133) is located above the detection slide shaft (134) and is used to detect the height to which the detection slide shaft (134) is lifted up.

6. The synchronous tightening device for a high-pressure common rail pump according to claim 1, characterized in that: The high-pressure common rail pump synchronous tightening device also includes an operating box (6) and an electrical box (9), wherein the electrical box (9) is electrically connected to the operating box (6) and is used to provide power to the operating box (6); The control box (6) is electrically connected to the servo drive motor (107) to control the working state of the servo drive motor (107); the control box (6) is electrically connected to the torque sensor (105) to receive the detection data of the torque sensor (105); the control box (6) is electrically connected to the motor brake (106) to control the start and stop of the motor brake (106); the control box (6) is electrically connected to the oil dripper (123) to control the working state of the oil dripper (123); the control box (6) is electrically connected to the height sensor (133) to receive the measurement data of the height sensor (133).

7. The synchronous tightening device for a high-pressure common rail pump according to claim 6, characterized in that: The high-pressure common rail pump synchronous tightening device further comprises a machine frame (1), wherein a mounting platform is arranged in the machine frame (1), and the first workstation and the second workstation are arranged in sequence on the mounting platform along the first direction; A viewing window (5) is detachably mounted on the machine frame (1), and the viewing window (5) comprises two window doors, both of which are rotatably connected to the machine frame (1); The control box (6) is fixedly mounted on the side of the machine frame (1); The oil dripping mechanism (12) further comprises a proximity sensor, the control box (6) being electrically connected to the proximity sensor, the proximity sensor being used to send a signal to the control box (6) when an object approaches the oil dripper (123); the control box (6) being configured to control the oil dripper (123) to drip oil after receiving the signal from the proximity sensor; The tightening mechanism (10) further comprises a position sensor, which is used to detect whether the position of the solenoid valve (21) is at a predetermined position; the control box (6) is electrically connected to the position sensor to receive measured data of the position sensor; The machine frame (1) is provided with a plurality of material channels (7), and the material channels (7) are used to place turnover boxes (4); the machine frame (1) is provided with at least one iron material box (8) at its edge portion close to the mounting platform.

8. The synchronous tightening device for a high-pressure common rail pump according to claim 7, characterized in that: A three-color light (17) is installed on the top of the machine frame (1), and the three-color light (17) is electrically connected to the control box (6) to receive a status signal from the control box (6).

9. A method for using the synchronous tightening device for a high-pressure common rail pump according to any one of claims 1 to 8, characterized in that: The following steps are involved: The pump body (2) is moved to the bottom of the oil dripper (123) by means of a conveyor belt; Detecting whether the pump body (2) below the oil dripper (123) is in place by means of a proximity sensor; When the proximity sensor detects that the pump body (2) is in place, the oil dripper (123) is controlled to drip oil to the electromagnetic valve installation position on the pump body (2); when the proximity sensor detects that the pump body (2) is not in place, the operation of moving the pump body (2) below the oil dripper (123) is repeated until the proximity sensor detects that the pump body (2) is in place; After the oil dripper (123) drips oil onto the electromagnetic valve installation position on the pump body (2), an O-ring is installed at the electromagnetic valve installation position on the pump body (2); After installing an O-ring at the solenoid valve installation position on the pump body (2), press the solenoid valve (21) into the solenoid valve installation position on the pump body (2), and place a screw in each screw hole on the solenoid valve (21); The pump body (2) pressed into the solenoid valve (21) is moved to below the height detection mechanism (13), and the height detection mechanism (13) is controlled to descend to a predetermined height by a third lifting cylinder (131), so that the solenoid valve (21) lifts up a detection slide shaft (134) in the height detection mechanism (13), and the height of the detection slide shaft (134) being lifted up is detected by a height sensor (133) to determine whether the solenoid valve (21) is installed in place; When the solenoid valve (21) is installed in place, the pump body (2) pressed into the solenoid valve (21) is moved to a predetermined position below the tightening mechanism (10); when the solenoid valve (21) is not installed in place, the O-ring is reinstalled at the solenoid valve installation position on the pump body (2), the solenoid valve (21) is pressed into the solenoid valve installation position on the pump body (2), and a screw is placed in each screw hole on the solenoid valve (21) until the solenoid valve (21) is installed in place; detecting, by means of a position sensor, whether the pump body (2) pressed into the solenoid valve (21) moves to a predetermined position below the tightening mechanism (10); When it is detected that the pump body (2) pressed into the solenoid valve (21) moves to a predetermined position below the tightening mechanism (10), the tightening mechanism (10) is controlled to descend to a preset height by means of a first lifting cylinder (111); when it is detected that the pump body (2) pressed into the solenoid valve (21) does not move to the predetermined position below the tightening mechanism (10), the operation of moving the pump body (2) pressed into the solenoid valve (21) to the predetermined position below the tightening mechanism (10) is repeated until the pump body (2) pressed into the solenoid valve (21) correctly moves to the predetermined position below the tightening mechanism (10); Synchronously tightening the screws placed in each screw hole on the solenoid valve (21) by means of the tightening mechanism (10); detecting the torque of the tightening mechanism (10) tightening the screw on the solenoid valve (21) by means of a torque sensor (105); When the torque detected by the torque sensor (105) is within a preset torque threshold range, the synchronous tightening operation of the screws is completed; when the torque detected by the torque sensor (105) is not within the preset torque threshold range, the operation of the tightening mechanism (10) synchronously tightening the screws placed in each screw hole on the solenoid valve (21) is repeated until the torque detected by the torque sensor (105) is within the preset torque threshold range.

10. The method for using the synchronous tightening device for a high-pressure common rail pump according to claim 9, characterized in that: The method of synchronously tightening the screws placed in each screw hole on the solenoid valve (21) by the tightening mechanism (10) specifically comprises: Starting the pre-tightening operation of the tightening mechanism (10), driving the screwdriver bit (1011) in the tightening mechanism (10) to rotate in a positive direction, so as to apply a torque to the screw placed in each screw hole on the solenoid valve (21), until a predetermined pre-tightening torque is reached; when the pre-tightening torque is reached, the tightening mechanism (10) stops the tightening action; Starting the retraction operation of the tightening mechanism (10) to drive the screwdriver bit (1011) in the tightening mechanism (10) to rotate in the opposite direction, so as to release the pre-tightening force of the screw; The fixed torque operation of the tightening mechanism (10) is started, and the screwdriver bit (1011) in the tightening mechanism (10) is driven to rotate in a positive direction, so as to apply a torque to the screw placed in each screw hole on the solenoid valve (21), until a predetermined tightening torque is reached, thereby completing the synchronous tightening operation of the screw placed in each screw hole on the solenoid valve (21).

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