Oil adjusting device and diesel engine

Abstract

The invention provides an oil adjusting device and a diesel engine. The oil adjusting device comprises a rocker arm assembly, a connecting rod, a first torsional spring and a second torsional spring. The rocker arm assembly rotationally sleeves the oil adjusting rod, and the two ends of the connecting rod are rotationally connected with the rocker arm assembly and the rack correspondingly. The first torsion spring and the second torsion spring are both arranged on the oil adjusting rod in a sleeving mode and are arranged on the two sides of the rocker arm assembly respectively; the far end of each torsional spring is fixedly connected with the oil adjusting rod, and the near end of each torsional spring abuts against the rocker arm assembly. The first torsion spring applies acting force moving in the oil mass increasing direction to the rack through the rocker arm assembly, and the second torsion spring applies acting force moving in the oil mass reducing direction to the rack through the rocker arm assembly. Due to the fact that the oil adjusting rod is elastically connected with the rocker arm assembly through the first torsion spring and the second torsion spring, when a rack of a certain oil injection pump is stuck, the torsional deformation of all the torsion springs can be changed to replace the moving stroke of the stuck rack, smooth rotation of the oil adjusting rod is guaranteed, and then normal oil adding and reducing actions of other normal racks are guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of oil supply regulation, and in particular relates to a thermoelectric conversion device. Background Art

[0002] The oil regulating device is the core structure of the diesel engine. Current diesel engines will install multiple oil regulating devices on the oil regulating rod, and each oil regulating device is connected to the rack of the corresponding injection pump to convert the rotation of the oil regulating rod into the linear motion of the rack, thereby achieving the purpose of adjusting the oil volume of the corresponding injection pump. Figure 1 As shown, it includes an integrated rocker arm 110" and a connecting rod 120; one end of the connecting rod 120 is rotatably connected to the integrated rocker arm 110" and the other end of the connecting rod 120 is rotatably connected to the rack 300 of the corresponding fuel injection pump. The end of the integrated rocker arm 110" away from the connecting rod 120 is fixed to the oil adjustment rod 200. As a result, when the oil adjustment rod 200 rotates, the integrated rocker arm 110" rotates synchronously to drive the connecting rod 120 to swing, thereby achieving linear reciprocating motion of the rack 300. If the rack 300 of a fuel injection pump becomes stuck, its corresponding oil adjustment device will also be unable to move, and the oil adjustment rod 200 will be unable to rotate. As a result, the racks of other normal fuel injection pumps will also be unable to move, affecting the normal operation of the diesel engine.

[0003] In order to solve the problem that the racks of other normal pumps cannot move due to the jamming of a certain fuel injection pump rack, the invention patent with patent number 2018114720580 discloses an oil regulating device, which includes a rack rocker arm component arranged on the oil regulating rod; the rack rocker arm component includes a rack rocker arm, a connecting plate and a torsion spring; wherein, the rack rocker arm is fixedly sleeved on the oil regulating rod; the connecting plate is provided with a long strip through hole of a preset length along the length direction, and a connecting piece is provided on at least one side of the rack rocker arm, which is stuck in the long strip through hole and can move in the through hole; the connecting plate is rotatably connected to the rack; the torsion spring is sleeved on the oil regulating rod, one end of the torsion spring is fixedly connected to the rack rocker arm, and the other end of the torsion spring is against the rack or the connecting plate or the connecting part of the rack and the connecting plate, thereby applying an elastic force to the rack in the direction of reducing the oil amount. Thus, when the rack of one cylinder (i.e., the rack of the fuel injection pump corresponding to one cylinder) is stuck, the rack rocker arm corresponding to that rack can move within the travel of the connecting plate (i.e., the sliding of the connecting member on the rack rocker arm within the elongated through-hole replaces the movement of the stuck rack), allowing the racks of the other cylinders to operate normally between the stuck position and the zero fuel level. However, when the rack of one cylinder is stuck in this patent, the racks of the other cylinders can only operate normally between the stuck position and the zero fuel level, and cannot operate normally between the stuck position and the maximum fuel level, thereby limiting the maximum output capacity of the diesel engine when the rack of one cylinder is stuck. Summary of the Invention

[0004] In view of the above shortcomings of the prior art, the object of the present invention is to provide an oil regulating device and a diesel engine, which can allow the racks of other normal oil pumps to work normally between the minimum oil level and the maximum oil level after the rack of any injection pump is stuck.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides an oil regulating device, comprising a rocker arm assembly, a connecting rod, a first torsion spring and a second torsion spring; the rocker arm assembly is rotatably sleeved on the oil regulating rod, and the two ends of the connecting rod are rotatably connected to the rocker arm assembly and the rack respectively; the first torsion spring and the second torsion spring are both sleeved on the oil regulating rod, and the first torsion spring and the second torsion spring are respectively arranged on both sides of the rocker arm assembly; the first torsion spring and the second torsion spring each have a proximal end and a distal end, and the distal end of each torsion spring is fixedly connected to the oil regulating rod, and the proximal end of each torsion spring is against the rocker arm assembly; the first torsion spring is rocked by The arm assembly applies a force to the rack to move in the direction of increasing the oil amount, and the second torsion spring applies a force to the rack to move in the direction of decreasing the oil amount through the rocker arm assembly; since the oil regulating rod is elastically connected to the rocker arm assembly through the first torsion spring and the second torsion spring, when the rack of a certain fuel injection pump is stuck, the moving stroke of the stuck rack can be replaced by changing the torsional deformation of the first torsion spring and the second torsion spring, thereby ensuring the smooth rotation of the oil regulating rod, and then ensuring the normal addition and subtraction of oil of other normal racks, so that other normal racks can work normally between the maximum oil level and the minimum oil level.

[0006] Preferably, the rocker arm assembly includes a first rocker arm and a second rocker arm which are separately arranged, and the first rocker arm and the second rocker arm can abut against each other to transmit the force; the first rocker arm and the second rocker arm are both rotatably mounted on the oil regulating rod, and the second rocker arm is rotatably connected to the connecting rod; the proximal end of the first torsion spring abuts against the first rocker arm, and the proximal end of the second torsion spring abuts against the second rocker arm; in this way, when the first rocker arm or the second rocker arm is damaged, there is no need to replace the entire rocker arm assembly, only the damaged rocker arm needs to be replaced, which effectively reduces the replacement cost.

[0007] Preferably, a shift rod is detachably fixed to the oil regulating rod, and an arc-shaped slide groove of a preset length is provided on the first rocker arm; the arc-shaped slide groove is coaxially arranged with the oil regulating rod, and the shift rod can slide in the arc-shaped slide groove; the cooperation between the shift rod and the arc-shaped slide groove can help the installer quickly and accurately determine the installation position of the second rocker arm in the axial direction of the oil regulating rod, and then determine the installation position of the entire oil regulating device.

[0008] Preferably, the shifting rod is arranged perpendicular to the oil regulating rod.

[0009] Preferably, the first rocker arm and the second rocker arm are abutted against each other through an adjusting rod; the adjusting rod is used to adjust the relative angle between the first rocker arm and the second rocker arm to change the minimum oil level position and the maximum oil level position of the rack, thereby achieving the purpose of adjusting the minimum oil supply and the maximum oil supply of the corresponding injection pump, and ultimately making it possible for the injection amount of each injection pump to be exactly the same when the oil adjustment rod is rotated to a certain angle to ensure the balance of each cylinder.

[0010] Preferably, the adjusting rod is a screw rod, so that the length of the portion of the screw rod between the first rocker arm and the second rocker arm can be changed by rotating the screw rod.

[0011] Preferably, the prestressed torque value of the first torsion spring is greater than the prestressed torque value of the second torsion spring, and the difference between the prestressed torque values ​​of the first torsion spring and the second torsion spring is greater than the maximum resistance torque of the rack, so that when the oil regulating device is installed, the torque difference between the first torsion spring and the second torsion spring is used to swing the first rocker arm to a position where the arc-shaped slide groove is close to the position where the end of the rack contacts the shift rod, so that the rocker arm assembly composed of the first rocker arm and the second rocker arm is in a force balance state under the action of the first torsion spring, the second torsion spring and the shift rod, which not only facilitates the subsequent connection of the oil regulating device with the corresponding rack, but also reduces or avoids the idle stroke of the oil regulating rod when the fuel injection pump is refueling, thereby realizing rapid refueling of the fuel injection pump.

[0012] Preferably, the prestressed torque value of the second torsion spring is greater than the maximum resistance torque of the rack, so as to further reduce or avoid the idle stroke of the oil regulating rod when the fuel injection pump reduces oil, thereby achieving rapid oil reduction of the fuel injection pump.

[0013] Preferably, the oil regulating rod is provided with a hook rod for hooking the distal end of each torsion spring to reduce the difficulty of assembling and disassembling each torsion spring.

[0014] The present invention also provides a diesel engine, which includes the above-mentioned oil regulating device.

[0015] As described above, the oil adjustment device and diesel engine provided by the present invention have the following beneficial effects:

[0016] Since the oil regulating rod in the oil regulating device and the diesel engine of the present invention is elastically connected to the rocker arm assembly through the first torsion spring and the second torsion spring, when the rack of a certain fuel injection pump is stuck, the movement stroke of the stuck rack can be replaced by changing the torsional deformation of the first torsion spring and / or the second torsion spring, thereby ensuring the smooth rotation of the oil regulating rod and further ensuring that other normal racks can work normally between the minimum oil level and the maximum oil level.

[0017] The rocker arm assembly of the present invention preferably adopts a first rocker arm and a second rocker arm which are separately arranged, and the first rocker arm and the second rocker arm are pressed against each other through an adjusting rod, so that the relative angle of the first rocker arm and the second rocker arm can be adjusted by using the adjusting rod, thereby changing the minimum oil level position and the maximum oil level position of the corresponding rack to ensure that the oil adjustment rod is within the preset angle stroke, and the oil injection amount of the injection pump where the rack is located can always be the same as the oil injection amount of other injection pumps, ensuring balanced oil supply to each cylinder.

[0018] The present invention detachably fixes a shift rod on the oil regulating rod, and provides an arc-shaped slide groove on the first rocker arm that slidably cooperates with the shift rod, so that the width of the arc-shaped slide groove is adapted to the width of the shift rod, so as to utilize the cooperation between the shift rod and the arc-shaped slide groove to determine the installation position of the second rocker arm in the axial direction of the oil regulating rod, thereby facilitating the determination of the installation position of the entire oil regulating device.

[0019] The present invention preferably makes the prestressed torque value of the first torsion spring greater than the prestressed torque value of the second torsion spring, and makes the first rocker arm swing to the angular position where the arc slot is close to one end of the rack and abuts against the shift rod, so that the rocker arm assembly composed of the first rocker arm and the second rocker arm is in a balanced static state under the action of the first torsion spring, the second torsion spring and the shift rod, so as to facilitate the subsequent connection of the oil adjustment device with the corresponding rack; in addition, the difference between the prestressed torque values ​​of the first torsion spring and the second torsion spring is preferably greater than the maximum resistance torque of the rack, and the prestressed torque value of the second torsion spring is also greater than the maximum resistance torque of the rack; in this way, when the oil adjustment rod rotates clockwise, it will drive the shift rod and the distal ends of each torsion spring to rotate together, so that the shift rod can adjust the first rocker arm The resistance effect disappears, and since the prestressed torque difference between the first torsion spring and the second torsion spring is greater than the maximum resistance torque of the rack, the rocker arm assembly will swing clockwise under the action of the torque difference, driving the rack to move in the refueling direction to complete the refueling operation; conversely, when the oil adjusting rod rotates counterclockwise, it will drive the shift lever and the far ends of each torsion spring to rotate together. At this time, the shift lever will shift the first rocker arm to rotate counterclockwise synchronously, separating the first rocker arm from the second rocker arm, and the second rocker arm will rotate counterclockwise under the action of the second torsion spring to drive the rack to move in the oil reduction direction to complete the oil reduction operation; since the oil adjusting device can quickly respond to the movement of the oil adjusting rod, it can effectively reduce or avoid the idle stroke of the oil adjusting rod, thereby realizing rapid addition and subtraction of oil by the fuel injection pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a left view of the oil regulating device in the prior art when it is connected to the oil regulating rod and the rack.

[0021] Figure 2 This is a three-dimensional diagram of the oil regulating device, the oil regulating rod and the corresponding rack assembled from a first perspective in this application.

[0022] Figure 3 for Figure 2 The oil regulating device, the oil regulating rod and the corresponding rack are shown in a three-dimensional assembly diagram from a second viewing angle.

[0023] Figure 4 for Figure 2 Right view of .

[0024] Figure 5 for Figure 2 Top view of .

[0025] Figure 6 It is a three-dimensional diagram of the first torsion spring.

[0026] Figure 7 It is a three-dimensional diagram of the first rocker arm.

[0027] Figure 8 It is a three-dimensional diagram of the second rocker arm.

[0028] Figure 9 for Figure 2 The diagram shows the motion state of the oil regulating device when the rack is stuck.

[0029] Description of Reference Numerals

[0030] Integrated rocker arm 110ˊ;

[0031] Rocker arm assembly 110, first rocker arm 111, arcuate slide groove 111a, first rocker arm body 1111, first rotating cylinder 1112, limiting groove 111b, threaded hole 111c, second rocker arm 112, second rocker arm body 1121, second rotating cylinder 1122, first abutting block 1123, second abutting block 1124, adjusting rod 113;

[0032] Connecting rod 120, first torsion spring 130, second torsion spring 140;

[0033] Oil regulating lever 200, hook lever 210, shift lever 220;

[0034] Rack 300. DETAILED DESCRIPTION

[0035] The following describes the implementation of the present invention through specific embodiments. People skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0036] See also Figures 1 to 9. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0037] like Figure 1 As shown, the oil regulating device provided by the present invention is installed on the oil regulating rod 200 and is connected to the rack 300 of the corresponding fuel injection pump to convert the rotational motion of the oil regulating rod 200 into a linear reciprocating motion of the rack 300, thereby realizing the oil addition and reduction action of the corresponding fuel injection pump 300.

[0038] It should be noted that a plurality of oil regulating devices are installed on the oil regulating rod 200, and each oil regulating device is connected to a rack 300 of a fuel injection pump in a one-to-one correspondence; wherein, the fuel injection pump is the oil supply component of the cylinder, and each cylinder has a corresponding fuel injection pump; that is, when the oil regulating rod 200 rotates, the racks 300 of the plurality of fuel injection pumps can be moved to realize simultaneous oil supply to multiple cylinders.

[0039] It should be noted that the rotational power of the oil regulating rod 200 comes from the speed regulator. Since the speed regulator is a prior art, it will not be described in detail.

[0040] For the sake of convenience, in the following embodiments, the length direction of the rack 300 (i.e., the moving direction of the rack 300) is defined as the front-to-back direction, the width direction of the rack 300 is defined as the left-right direction, and the thickness direction of the rack 300 is defined as the up-down direction. Figure 6 In the view shown, the upper side and the lower side of the paper are the front direction and the rear direction respectively, the left side and the right side of the paper are the left direction and the right direction respectively, and the front and the back of the paper are the upper direction and the lower direction respectively.

[0041] like Figures 2 to 5As shown, the oil regulating device provided by the present invention includes a rocker arm assembly 110, a connecting rod 120, a first torsion spring 130 and a second torsion spring 140; wherein, the upper end of the rocker arm assembly 110 is rotatably mounted on the oil regulating rod 200, and the two ends of the connecting rod 120 are rotatably connected to the lower end of the rocker arm assembly 110 and the rack 300 respectively; the first torsion spring 130 and the second torsion spring 140 are both mounted on the oil regulating rod 200, and the first torsion spring 130 and the second torsion spring 140 are respectively arranged on the left and right sides of the rocker arm assembly 110.

[0042] In addition, if Figure 2 As shown, the first torsion spring 130 and the second torsion spring 140 both have a proximal end and a distal end, and the distal end of each torsion spring is fixedly connected to the oil regulating rod 200, and the proximal end of each torsion spring is against the rocker arm assembly 110; in the initial installation state, the first torsion spring 130 and the second torsion spring 140 both have prestressed torque values, and the prestressed torque values ​​of the first torsion spring 130 and the second torsion spring 140 are in opposite directions; in this way, the first torsion spring 130 can apply a force to the rack 300 through the rocker arm assembly 110 to move in the direction of increasing the oil amount (i.e., moving forward), and the second torsion spring 140 can apply a force to the rack 300 through the rocker arm assembly 110 to move in the direction of decreasing the oil amount (i.e., moving backward).

[0043] It should be noted that in the present application, the rotational connection between the two components is achieved through a pin shaft; wherein a cotter pin is inserted on the pin shaft to limit the movement of the two components in the axial direction of the pin shaft through the cooperation between the pin shaft end and the cotter pin.

[0044] It should be noted that the structures of the torsion springs are the same, and the distal ends of the torsion springs are fixed to the oil regulating rod 200 by welding, crimping, hooking, etc. In order to facilitate the disassembly and assembly of the torsion springs, in this embodiment, Figure 2 and Figure 6 As shown, the distal end of each torsion spring is in the shape of a hook, and a hook rod 210 that cooperates with the hook-shaped distal end is detachably fixed to the oil regulating rod 200 by means of threaded connection or the like.

[0045] It is understandable that the rocker arm assembly 110 is an integrated structure or a split structure, which is not limited to this; in this embodiment, the rocker arm assembly 110 is preferably a split structure.

[0046] like Figure 2 As shown, the rocker arm assembly 110 includes a first rocker arm 111 and a second rocker arm 112 which are separately arranged; wherein, the upper ends of the first rocker arm 111 and the second rocker arm 112 are both rotatably mounted on the oil regulating rod 200, and the lower end of the second rocker arm 112 is rotatably connected to the connecting rod 120; in addition, the proximal end of the first torsion spring 130 is against the rear side of the first rocker arm 111, and the proximal end of the second torsion spring 140 is against the front side of the second rocker arm 112, and the first rocker arm 111 and the second rocker arm 112 can abut against each other to transmit the force from the torsion springs.

[0047] like Figure 2 and Figure 7 As shown, the first rocker arm 111 includes a first rocker arm body 1111 and a first rotating cylinder 1112; wherein, the first rotating cylinder 1112 is fixed to the upper end of the first rocker arm body 1111 and is rotatably sleeved on the oil regulating rod 200; the first rocker arm body 1111 is generally convex in shape, with its left end abutting against the second rocker arm 1112 and its right end abutting against the proximal end of the first torsion spring 130.

[0048] like Figure 2 and Figure 8 As shown, the second rocker arm 112 includes a second rocker arm body 1121 and a second rotating cylinder 1122; wherein, the second rotating cylinder 1122 is fixed to the upper end of the second rocker arm body 1121 and is rotatably sleeved on the oil regulating rod 200; the right side of the second rocker arm body 1121 is formed with a first abutment block 1123 that abuts against the first rocker arm 111, and the left side of the second rocker arm body 1121 is formed with a second abutment block 1124 that abuts against the proximal end of the second torsion spring 140.

[0049] In a preferred embodiment, the left end of the first rocker arm body 1111 and the second abutting block 1124 both have a limiting groove 111 b , and the limiting groove 111 b is used to accommodate the proximal end of the corresponding torsion spring.

[0050] In a preferred embodiment, the first rocker arm 111 and the second rocker arm 112 are abutted against each other via an adjustment rod 113. The adjustment rod 113 is used to adjust the relative angle between the first rocker arm 111 and the second rocker arm 112, thereby changing the minimum and maximum oil levels of the corresponding rack 300, thereby adjusting the minimum and maximum fuel supply of the corresponding fuel injection pump. By allowing the user to fine-tune the rack travel of each fuel injection pump at a key position of the oil adjustment rod to compensate for inherent differences between the fuel injection pumps (such as manufacturing and assembly errors), the fuel injection amount of each fuel injection pump is ultimately as close as possible to the same value at the same oil adjustment rod angle, thereby achieving balanced cylinder operation.

[0051] It is understood that the adjusting rod 113 is a screw or a telescopic rod with adjustable length, which is not limited to this; in this embodiment, the adjusting rod 113 is a screw, which is threadedly connected to the threaded hole 111c (such as Figure 7 Thus, by simply turning the screw, the length of the screw between the first rocker arm 111 and the second rocker arm 112 can be changed, thereby achieving the purpose of changing the relative angle.

[0052] Furthermore, in order to quickly and easily determine the axial installation position of the rocker arm assembly 110 on the oil regulating rod 200, as shown in FIG. Figure 2As shown, the oil regulating rod 200 is detachably fixed with a shift rod 220 by means of a threaded connection, a snap connection, etc., and the first rocker arm 111 is provided with an arcuate groove 111a of a preset length; wherein the arcuate groove 111a is coaxially arranged with the oil regulating rod 200, and the shift rod 220 can slide in the arcuate groove 111a.

[0053] Among them, the width of the arc-shaped groove 111a needs to be adapted to the width of the shift rod 220 (that is, the size of the shift rod 220 in the axial direction of the oil regulating rod 200), so as to help the installer quickly determine the axial installation position of the first rocker arm 111 on the oil regulating rod 200 through the cooperation between the arc-shaped groove 111a and the shift rod 220, and then facilitate the determination of the axial installation position of the entire oil regulating device on the oil regulating rod 200.

[0054] It is understandable that the shifting rod 220 and the oil regulating rod 200 are arranged at an angle; in this embodiment, the shifting rod 220 and the oil regulating rod 200 are arranged perpendicularly.

[0055] It should be noted that, in the initial installation state, the rocker arm assembly 110 is in a balanced static state, and the corresponding rack 300 is at zero oil level; according to the installation angle and force conditions of the rocker arm assembly 110 in the initial installation state, the oil adjustment device includes but is not limited to the following embodiments.

[0056] Example 1 of the oil adjustment device:

[0057] In this embodiment, the rocker arm assembly 110 in the initial installation state is only subjected to the torque of each torsion spring and the resistance torque of the rack (the resistance torque of the rack can be 0, in which case the prestressed torque values ​​of the first torsion spring 130 and the second torsion spring 140 are the same); wherein, the prestressed torque values ​​of the first torsion spring 130 and the second torsion spring 140 can be the same or different, and there is no limitation on this, as long as the difference between the prestressed torque values ​​of the first torsion spring 130 and the second torsion spring 140 is less than the maximum resistance torque of the rack 300 (i.e., the resistance torque formed by the maximum static friction force of the rack).

[0058] In addition, when the first rocker arm 111 slides with the lever 220 on the oil regulating rod 200 through the arc-shaped groove 111a, during the process of adding and reducing oil by the fuel injection pump, the lever 220 never contacts the end of the arc-shaped groove 111a (that is, the lever 220 does not apply an anti-rotation resistance torque to the first rocker arm 111).

[0059] For ease of understanding, now combined with Figure 2 , the working process of the oil regulating device using this embodiment is described in the normal working state and the rack stuck state.

[0060] Under normal working conditions:

[0061] like Figure 2As shown, in the initial installation state, the rack 300 is at the minimum oil level. Since the difference between the prestressed torque values ​​of the first torsion spring 130 and the second torsion spring 140 is less than the maximum resistance torque of the rack 300 (i.e., the resistance torque formed by the maximum static friction of the rack), the oil regulating device is in a balanced static state. When the fuel injection pump needs to be refueled, it must first be turned clockwise (i.e., Figure 2 The oil regulating rod 200 is rotated in the direction of the dotted arrow) to increase the torque value of the first torsion spring 130 and reduce the torque value of the second torsion spring 140, until the difference between the torque values ​​of the first torsion spring 130 and the second torsion spring 140 is greater than the maximum resistance torque of the rack 300 (that is, the oil regulating rod 200 has a refueling idle stroke); at this time, continue to rotate the oil regulating rod 200 clockwise, the first torsion spring 130 will follow the rotation, and the first torsion spring 130 will push the first rocker arm 111 and the second rocker arm 112 abutting against it to rotate together, thereby driving the connecting rod 120 to swing forward, causing the rack 300 connected to the connecting rod 120 to move forward, and completing the refueling operation.

[0062] When the fuel injection pump needs to reduce oil, it must be turned counterclockwise (i.e. Figure 2 The oil regulating rod 200 is rotated in the direction of the solid arrow) to increase the torque value of the second torsion spring 140 and reduce the torque value of the first torsion spring 130, until the difference between the torque values ​​of the second torsion spring 140 and the first torsion spring 130 is greater than the maximum resistance torque of the rack 300 (that is, the oil regulating rod 200 has a section of oil reduction idle stroke); at this time, the oil regulating rod 200 continues to be rotated counterclockwise, and the second torsion spring 140 will follow the rotation, and push the second rocker arm 112 and the first rocker arm 111 abutting against it to rotate together through the second torsion spring 140, thereby driving the connecting rod 120 to swing backward, causing the rack 300 connected to the connecting rod 120 to move backward, and completing the oil reduction operation.

[0063] When the rack is stuck:

[0064] When the rack 300 of a certain fuel injection pump is stuck, its corresponding connecting rod 120 and second rocker arm 112 will also be stuck and remain motionless; at this time, when other normal fuel injection pumps need to be refueled, it is only necessary to rotate the oil regulating rod 200 clockwise to make the first torsion spring 130 corresponding to the stuck rack twist and store energy, and the second torsion spring 140 twist and release energy, so as to replace the rotation stroke of the second rocker arm 112 corresponding to the stuck rack by changing the torsional deformation of the first torsion spring 130 and the second torsion spring 140, thereby ensuring the smooth rotation of the oil regulating rod 200 and thus ensuring the smooth refueling of other normal fuel injection pumps. When other normal fuel injection pumps need to reduce oil, it is only necessary to rotate the oil regulating rod 200 counterclockwise to make the second torsion spring 140 corresponding to the stuck rack twist and store energy, and the first torsion spring 130 twist and release energy, so as to replace the rotation stroke of the second rocker arm 112 corresponding to the stuck rack by changing the torsional deformation of the first torsion spring 130 and the second torsion spring 140, thereby ensuring the smooth rotation of the oil regulating rod 200 and further ensuring the smooth reduction of oil in other normal fuel injection pumps.

[0065] It can be seen from this that even if the rack 300 of a certain fuel injection pump is stuck, the rack 300 of other normal fuel injection pumps can move back and forth between the stuck oil level and the maximum oil level, and can also move back and forth between the stuck oil level and the minimum oil level, thereby realizing the normal oil addition and reduction operations of the normal fuel injection pumps.

[0066] Oil adjustment device embodiment 2:

[0067] like Figure 2 As shown, in the initial installation state, the first rocker arm 111 is at an angular position where the front end of the arcuate slot 111a abuts the shift lever 220. At this point, the rocker arm assembly 110, in which the first rocker arm 111 resides, is only subjected to the torque of the torsion springs and the anti-rotation torque applied by the shift lever 220. The anti-rotation torque is in the opposite direction to the prestressed torque of the first torsion spring 130. Since the rocker arm assembly 110 is in a balanced, stationary state in the initial installation state, the prestressed torque of the first torsion spring 130 is necessarily greater than the prestressed torque of the second torsion spring 140.

[0068] It is understandable that the prestressed torque values ​​of the first torsion spring 130 and the second torsion spring 140 are both greater than the maximum resistance torque of the rack 300, or only the prestressed torque value of the first torsion spring 130 is greater than the maximum resistance torque of the rack 300, which is not limited to this.

[0069] In this embodiment, in order to avoid the idle stroke of the oil regulating rod 200, the prestressed torque values ​​of the first torsion spring 130 and the second torsion spring 140 are both greater than the maximum resistance torque of the rack 300, and the difference between the prestressed torque values ​​of the first torsion spring 130 and the second torsion spring 140 is greater than the maximum resistance torque of the rack 300.

[0070] For ease of understanding, we now combine Figure 2 and Figure 9 , the working process of the oil regulating device using this embodiment is described in the normal working state and the rack stuck state.

[0071] Under normal working conditions:

[0072] like Figure 2 As shown, in the initial installation state, the rack 300 is at the minimum oil level. Since the difference between the prestressed torque values ​​of the first torsion spring 130 and the second torsion spring 140 is equal to the anti-rotation resistance torque provided by the lever 220, the oil regulating device is in a balanced static state. When the fuel injection pump needs to be refueled, it only needs to be turned clockwise (i.e. Figure 2By rotating the oil regulating rod 200 (in the direction of the dotted arrow), the shift rod 220 can be rotated synchronously with the oil regulating rod 200, so that the anti-rotation resistance torque applied by the shift rod 220 to the rocker arm assembly 110 disappears. At this time, since the difference in the prestressed torque values ​​of the first torsion spring 130 and the second torsion spring 140 is greater than the maximum resistance torque of the rack 300, the rocker arm assembly 110 will rotate along with the oil regulating rod 200 under the action of the prestressed torque difference, thereby driving the connecting rod 120 to swing forward, causing the rack 300 connected to the connecting rod 120 to move forward, completing the refueling operation; when the oil regulating rod 200 stops rotating, the rocker arm assembly 110 will again rest against the shift rod 220 under the action of the prestressed torque difference, and reach a balanced static state, completing the locking of the rack 300 position.

[0073] When the fuel injection pump needs to reduce oil, just turn it counterclockwise (i.e. Figure 2 When the oil regulating rod 200 stops rotating, the second rocker arm 112 will be pressed against the first rocker arm 111 under the action of the second torsion spring 140, and reach a balanced static state, thereby completing the locking of the position of the rack 300.

[0074] When the rack is stuck:

[0075] like Figure 2 As shown, when the rack 300 of a certain fuel injection pump is stuck, its corresponding connecting rod 120 and second rocker arm 112 will also be stuck and remain motionless; at this time, when other normal fuel injection pumps need to be refueled, it is only necessary to rotate the oil regulating rod 200 clockwise to make the first torsion spring 130 corresponding to the stuck rack twist and store energy, and the second torsion spring 140 twist and release energy, so as to replace the rotation stroke of the second rocker arm 112 corresponding to the stuck rack by changing the torsional deformation of the first torsion spring 130 and the second torsion spring 140, thereby ensuring the smooth rotation of the oil regulating rod 200 and further ensuring the smooth refueling of other normal fuel injection pumps.

[0076] like Figure 9As shown, when other normal fuel injection pumps need to reduce oil, it is only necessary to rotate the oil regulating rod 200 counterclockwise; during this process, the first rocker arm 111 rotates synchronously with the oil regulating rod 200 under the drive of the shift rod 220, and separates from the second rocker arm 112; at the same time, the second torsion spring 140 corresponding to the stuck rack twists and stores energy, so as to replace the rotation stroke of the second rocker arm 112 corresponding to the stuck rack by changing the torsional deformation of the second torsion spring 140, thereby ensuring the smooth rotation of the oil regulating rod 200, and thus ensuring the smooth reduction of oil in other normal fuel injection pumps.

[0077] It can be seen from this that even if the rack 300 of a certain fuel injection pump is stuck, the rack 300 of other normal fuel injection pumps can move back and forth between the stuck oil level and the maximum oil level, and can also move back and forth between the stuck oil level and the minimum oil level, thereby realizing the normal oil addition and reduction operations of the normal fuel injection pumps.

[0078] In addition, when the fuel injection pump is in normal working condition, since the rocker arm assembly 110 in the oil adjustment device can quickly respond to the movement of the oil adjustment rod 200, the response speed of the fuel injection pump in adding and reducing oil is effectively improved, and the rapid addition and reduction operation of the fuel injection pump is realized.

[0079] The present invention also provides a diesel engine, which includes the above-mentioned oil regulating device.

[0080] In summary, since the rocker arm assembly 110 of the present application is elastically connected to the oil adjustment rod 200 via the first torsion spring 130 and the second torsion spring 140, when the rack 300 of a fuel injection pump becomes stuck, the torsional deformation of the first torsion spring 130 and / or the second torsion spring 140 can be changed to replace the travel of the stuck rack, thereby ensuring smooth rotation of the fuel adjustment rod 200 and, in turn, ensuring that other normal racks can operate normally between the minimum and maximum oil levels. This effectively avoids the problem in the prior art where, if the rack 300 of any fuel injection pump becomes stuck, the racks of other fuel injection pumps can only move between the stuck position and the minimum oil level, but not between the maximum and minimum oil levels. Therefore, the present invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0081] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. An oil adjustment device, characterized in that: The invention comprises a rocker assembly (110), a connecting rod (120), a first torsion spring (130) and a second torsion spring (140); the rocker assembly (110) is rotatably sleeved on the oil regulating rod (200), and the two ends of the connecting rod (120) are rotatably connected to the rocker assembly (110) and the rack (300); the first torsion spring (130) and the second torsion spring (140) are both sleeved on the oil regulating rod (200), and the first torsion spring (130) and the second torsion spring (140) are respectively arranged on the rocker assembly (110). 10); the first torsion spring (130) and the second torsion spring (140) both have a proximal end and a distal end, and the distal end of each torsion spring is fixedly connected to the oil regulating rod (200), and the proximal end of each torsion spring is against the rocker arm assembly (110); the first torsion spring (130) applies a force to the rack (300) to move in a direction of increasing the amount of oil through the rocker arm assembly (110), and the second torsion spring (140) applies a force to the rack (300) to move in a direction of decreasing the amount of oil through the rocker arm assembly (110).

2. The oil regulating device according to claim 1, characterized in that: The rocker arm assembly (110) includes a first rocker arm (111) and a second rocker arm (112) which are separately arranged. The first rocker arm (111) and the second rocker arm (112) can abut against each other to transmit a force. The first rocker arm (111) and the second rocker arm (112) are both rotatably sleeved on the oil regulating rod (200), and the second rocker arm (112) is rotatably connected to the connecting rod (120). The proximal end of the first torsion spring (130) abuts against the first rocker arm (111), and the proximal end of the second torsion spring (140) abuts against the second rocker arm (112).

3. The oil adjustment device according to claim 2, characterized in that: A shifting rod (220) is detachably fixed to the oil regulating rod (200), and an arcuate chute (111a) of a preset length is provided on the first rocker arm (111); the arcuate chute (111a) is coaxially arranged with the oil regulating rod (200), and the shifting rod (220) can slide in the arcuate chute (111a).

4. The oil adjustment device according to claim 3, characterized in that: The shifting rod (220) is arranged perpendicular to the oil regulating rod (200).

5. The oil regulating device according to claim 2, characterized in that: The first rocker arm (111) and the second rocker arm (112) are in contact with each other via an adjusting rod (113); the adjusting rod (113) is used to adjust the relative angle between the first rocker arm (111) and the second rocker arm (112).

6. The oil regulating device according to claim 5, characterized in that: The adjusting rod (113) is a screw rod.

7. An oil regulating device according to any one of claims 3 to 6, characterized in that: The prestress torque value of the first torsion spring (130) is greater than the prestress torque value of the second torsion spring (140), and the difference between the prestress torque values ​​of the first torsion spring (130) and the second torsion spring (140) is greater than the maximum resistance torque of the rack (300).

8. The oil regulating device according to claim 7, characterized in that: The prestress torque value of the second torsion spring (140) is greater than the maximum resistance torque of the rack (300).

9. An oil adjustment device according to claims 1 to 6, characterized in that: The oil regulating rod (200) is provided with a hook rod (210) for hooking the distal ends of the torsion springs.

10. A diesel engine, characterized in that: It comprises the oil regulating device as claimed in claims 1 to 9.

Images