A large screw plug dismounting tool for fuel injection pump

Abstract

The application provides a fuel injection pump large screw plug dismounting tool, which comprises a fixing platform, a pressing unit fixed on the fixing platform, a pressing head included in the pressing unit, the pressing head being capable of pressing on the upper surface of the fuel injection pump, a dismounting unit on one side of the fixing platform, the dismounting unit being capable of moving along the length direction of the fixing platform, a base, a screw sleeve, a bushing and a mandrel included in the dismounting unit, a guide hole being formed in the base, the screw sleeve being inserted into the guide hole and being capable of rotating in the guide hole, the bushing being screwed with the screw sleeve, the mandrel being inserted into the bushing and being capable of rotating in the bushing, and a dismounting head synchronously rotating with the mandrel. The fuel injection pump is fixed by the pressing head, the mandrel and the screw sleeve of the dismounting unit are matched, the dismounting head can be close to the fuel injection pump when the screw sleeve rotates alone, the dismounting head can drive the screw plug to rotate when the mandrel rotates alone, and the screw plug is dismounted, so that one worker can complete the dismounting of the screw plug, the dismounting difficulty is reduced, the cost is saved, and the work efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of fuel injection pump maintenance, and particularly relates to a fuel injection pump large screw plug dismounting tool. BACKGROUND

[0002] The fuel injection pump is an important component of an engine. After long-time use, the fuel injection pump may be damaged, and the connecting parts such as screw plugs may be sealed by adhesive, which causes difficulties in dismounting, repairing and cleaning the fuel injection pump. In the present maintenance process of the fuel injection pump, since the volume of some fuel injection pumps is large and the required torque for dismounting the screw plug is large, in the maintenance process of the fuel injection pump after long-time use, multiple persons are required to cooperate to fix the fuel injection pump, and then the screw plug is dismounted from the fuel injection pump by using a tool. In this way, it is very difficult to dismount the large screw plug, the work intensity is large, the efficiency is low, the cost is high, and human resources are wasted, which is not suitable for the batch production requirement of engine remanufacturing. SUMMARY

[0003] Therefore, the present application aims to provide a fuel injection pump large screw plug dismounting tool to reduce the dismounting difficulty of the fuel injection pump screw plug, save the dismounting cost and improve the dismounting speed.

[0004] To achieve the above object, the technical scheme of the present application is as follows:

[0005] A fuel injection pump large screw plug dismounting tool comprises

[0006] A fixed platform is provided with a plurality of pressing units fixed thereon, each of the pressing units comprises a pressing head capable of approaching or moving away from the fixed platform, and a plurality of adjusting studs are fixed on the upper surface of the fixed platform, and the two ends of the pressing head are capable of tightly pressing on the upper surface of the fuel injection pump and the top end of the adjusting stud, respectively.

[0007] A dismounting unit is arranged on one side of the fixed platform and is capable of moving along the length direction of the fixed platform, and the dismounting unit comprises a base, a screw sleeve, a bushing and a mandrel, the base is provided with a guide hole, the screw sleeve is inserted into the guide hole and is capable of rotating in the guide hole, the bushing is screwed with the screw sleeve, the mandrel is inserted into the bushing and is capable of rotating in the bushing, and a dismounting head is arranged on the end of the mandrel close to the fixed platform.

[0008] Further, the pressing unit further comprises a guide rod, the middle part of the pressing head is sleeved on the guide rod, and the top end of the guide rod is provided with a thread, and a pressing nut is screwed with the top end of the guide rod and is capable of tightly pressing on the pressing head.

[0009] Further, a reset spring is sleeved on the guide rod, one end of the reset spring tightly abuts against the upper surface of the fixed platform, and the other end of the reset spring is capable of abutting against the lower surface of the pressing head.

[0010] Further, the bottom end of the adjusting screw is screwed with a supporting nut, and the supporting nut can tightly abut against the upper surface of the fixing platform.

[0011] Further, at least one sliding rod is arranged on one side of the fixing platform, and the base is slidingly connected with the sliding rod.

[0012] Further, a plurality of positioning holes are formed on the sliding rod, and a positioning unit is arranged on the base, the positioning unit comprises a positioning column and a lever, and a notch is formed on one side of the positioning column, the lever can rotate around the middle part of the lever, one end of the lever is inserted into the notch, and the positioning column can move along the axial direction when the lever rotates.

[0013] Further, the positioning column extends upwardly to form a spring rod, the diameter of the spring rod is smaller than that of the positioning column, one positioning spring is sleeved on the spring rod, and one end of the positioning unit abuts against the base, and the other end abuts against the top end of the positioning column.

[0014] Further, a positioning edge is formed on the middle part of the screw sleeve, a positioning groove is formed on one end of the guide hole, the positioning edge is arranged in the positioning groove, and a pressing ring is fixedly connected with the base, and the inner side of the pressing ring can abut against the positioning edge.

[0015] Further, the dismounting head and the end part of the mandrel are connected through a key, so that the dismounting head and the mandrel rotate synchronously.

[0016] Further, a plurality of positioning blocks are fixedly arranged on the edge of the fixing platform.

[0017] Compared with the prior art, the dismounting tool for the large screw plug of the fuel injection pump has the following advantages:

[0018] According to the present application, the pressing head is arranged on the fixing platform to fix the fuel injection pump, the dismounting unit can move, the mandrel on the dismounting unit is matched with the screw sleeve, when the screw sleeve rotates alone, the dismounting head can approach the fuel injection pump, when the mandrel rotates alone, the dismounting head can drive the screw plug to rotate, and the screw plug is dismounted, so that one worker can complete the dismounting of the screw plug, the dismounting difficulty is reduced, the cost is saved, and the working efficiency is improved.

[0019] The adjusting screw with adjustable height is used to adjust the compactable height of the pressing head, so that the tool can be applied to dismount more types of products.

[0020] The positioning column and the positioning hole are matched, so that the base can be fixed during the work process, and the movement of the base during the rotation of the mandrel and the screw sleeve is prevented, so that the dismounting head deviates from the screw plug. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments of the application illustrated in the drawings are provided to explain embodiments of the application and not to pose limitations as to the scope of the present application. In the drawings:

[0022] Figure 1 is a top view of the dismounting tool;

[0023] Figure 2 is a schematic view of the overall structure of the dismounting unit;

[0024] Figure 3 is a Figure 2 is an enlarged view of A in the middle;

[0025] Figure 4 is a sectional view of the internal structure of the dismounting unit;

[0026] Figure 5 is a schematic view of the structure of the pressing unit;

[0027] Figure 6 is a sectional view of the base.

[0028] BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 1 - fixed platform; 11 - pressing unit; 111 - pressing head; 112 - adjusting stud; 113 - guide rod; 114 - pressing nut; 115 - return spring; 116 - supporting nut; 12 - positioning block; 2 - dismounting unit; 21 - base; 211 - guide hole; 212 - positioning unit; 2122 - positioning column; 2123 - lever; 2124 - notch; 2125 - spring rod; 2126 - positioning spring; 213 - positioning groove; 22 - threaded sleeve; 221 - positioning edge; 23 - bushing; 24 - mandrel; 25 - dismounting head; 26 - pressing ring; 3 - slide rod; 31 - positioning hole. DETAILED DESCRIPTION

[0030] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0031] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" and the like can be explicitly or implicitly included one or more. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0032] In the description of the present application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0033] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0034] The oil injection pump large screw plug dismounting tool described in the present application comprises

[0035] A fixing platform 1 for helping the operator to fix the oil injection pump and a dismounting unit 2 for sequentially dismounting the screw plug, more specifically, at least one slide rod 3 is fixed on one side of the fixing platform 1, the slide rod 3 is parallel to the edge of the fixing platform 1, the dismounting unit 2 can move axially along the slide rod 3, and in this embodiment, in order to facilitate the positioning of the dismounting unit 2, two slide rods 3 are adopted, and the dismounting unit 2 is in sliding connection with the two slide rods 3.

[0036] The fixed platform 1 edge is fixed with a plurality of positioning blocks 12, when the oil injection pump is placed above the fixed platform 1, the oil injection pump edge is supported by the positioning block 12, and the oil injection pump is positioned; A plurality of pressing units 11 are also fixed on the fixed platform 1, which is used to clamp the positioned oil injection pump to prevent the oil injection pump from moving when stressed. Specifically, in this embodiment, two pressing units 11 are provided, and each pressing unit 11 includes a pressure head 111, a guide rod 113 and a support bolt. The guide rod 113 and the support bolt are vertically fixed on the upper surface of the fixed platform 1. The middle part of the pressure head 111 is sleeved on the guide rod 113. The top end of the guide rod 113 is threaded. A pressing nut 114 is screwed with the top end of the guide rod 113, and the pressing nut 114 can tightly press on the pressure head 111. The support stud is placed on one side of the guide rod 113, and the pressure head 111 can tightly press on the top end of the support stud. After the oil injection pump is fixed on the fixed platform 1, the two ends of the pressure head 111 tightly press the top end of the support column and the upper surface of the oil injection pump at the same time. The pressure head 111 is tilted due to unilateral stress during the process of pressing the oil injection pump, so that the pressing and fixing are more reliable. The bottom end of the support stud is screwed with a support nut 116, which can tightly abut on the upper surface of the fixed platform 1, so as to adjust the height of the support stud, so that the height of the pressure head 111 can be adjusted according to the need, so as to be suitable for more specifications of parts fixing. The pressing nut 114 extends outwardly to form a handle, so as to facilitate the operator to pull the handle to quickly press the pressure head 111, and a gasket is arranged between the pressing nut 114 and the pressure head 111. The guide rod 113 is also sleeved with a return spring 115, one end of the return spring 115 abuts on the upper surface of the fixed platform 1, and the other end can abut on the lower surface of the pressure head 111, so that when the pressing nut 114 is loosened, the pressure head 111 can be quickly lifted after finishing the machining, preventing interference caused by the oil injection pump separating from the fixed platform 1.

[0037] The dismounting unit 2 comprises a base 21, a screw sleeve 22, a bushing 23 and a mandrel 24, the base 21 is in sliding connection with the two slide rods 3, the base 21 is provided with a guide hole 211, the axial direction of the guide hole 211 is perpendicular to the slide rod 3, the edge of the guide hole 211 is provided with a positioning groove 213, the screw sleeve 22 is an internal thread screw sleeve 22, the middle edge of the screw sleeve 22 extends outwardly to form a positioning edge 221, the screw sleeve 22 is inserted into the guide hole 211, the positioning edge 221 is arranged in the positioning groove 213, a pressing ring 26 is fixedly arranged on the base 21, the pressing ring 26 is arranged outside the screw sleeve 22, the inner side of the pressing ring 26 can be in close contact with the positioning edge 221, the screw sleeve 22 is prevented from falling off, and the screw sleeve 22 can rotate in the guide hole 211, the bushing 23 is provided with an external thread, the bushing 23 is inserted into the screw sleeve 22 and is in screw connection with the screw sleeve 22, the mandrel 24 is inserted into the bushing 23 and can rotate in the axial direction of the bushing 23, the end of the mandrel 24 close to the fixed platform 1 is provided with a key groove, a dismounting head 25 is in key connection with the mandrel 24, the dismounting head 25 and the mandrel 24 rotate synchronously through the torque transmitted by the key, and in order to facilitate operation, a handle is arranged at the end of the mandrel 24 away from the dismounting head 25 and the outer end of the screw sleeve 22, respectively, and an operator can rotate the screw sleeve 22 and the mandrel 24 through the handles.

[0038] The base 21 is provided with a containing cavity above, the positioning unit 212 is arranged in the containing cavity, the slide rod 3 is provided with a plurality of positioning holes 31, specifically, the positioning unit 212 comprises a positioning column 2122 and a lever 2123, one side of the positioning column 2122 is provided with a notch 2124, the lever 2123 can rotate around the middle part thereof, one end of the lever 2123 is inserted into the notch 2124, and the lever 2123 can drive the positioning column 2122 to move along the axial direction of the positioning column 2122 when the lever 2123 rotates, the positioning column 2122 extends upwardly to form a spring rod 2125, the diameter of the spring rod 2125 is smaller than that of the positioning column 2122, a positioning spring 2126 is arranged on the spring rod 2125, one end of the positioning unit 212 abuts against the upper wall of the containing cavity of the base 21, and the other end abuts against the top end of the positioning column 2122, the positioning hole 31 corresponds to the position of the gasket of the oil injection pump, when the lever 2123 is pressed downwardly, the lever 2123 rotates to make the positioning column 2122 disengage from the positioning hole 31, the base 21 can move along the slide rod 3, when the base 21 moves to the position of the next gasket, the positioning column 2122 moves downwardly to be inserted into the positioning hole 31 under the action of the spring, and the positioning of the base 21 is completed.

[0039] In the working process, first, the oil injection pump is positioned on the positioning block 12, and is fixed and pressed by the pressure head 111, the base 21 is adjusted to position, the dismounting head 25 corresponds to a screw plug, and the positioning column 2122 is inserted into the positioning hole 31 under the action of the spring, so that the base 21 is prevented from shaking, then the sleeve 22 is rotated through the handle, the bushing 23 drives the mandrel 24 to approach the oil injection pump, in this process, the mandrel 24 can be slightly rotated, the dismounting head 25 at the end of the mandrel 24 is sleeved on the screw plug, the mandrel 24 is rotated, the dismounting head 25 is rotated, and thus the screw plug is loosened, after the screw plug is dismounted, the positioning column 2122 is lifted by pressing the lever 2123, the base 21 is moved to the position of the next screw plug, the above operation is repeated, and thus the dismounting of the screw plug of the oil injection pump is completed.

[0040] The dismounting head 25 can be an internal spline sleeve, which is used to be sleeved on the screw plug and transmit torque.

[0041] The above only describes the preferred embodiments of the present application and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A fuel injection pump large grommet dismounting tool, characterized in that: The utility model relates to a fixed platform, which is fixed with a plurality of pressing units, each of which comprises a pressing head capable of approaching or moving away from the fixed platform, and the upper surface of the fixed platform is fixed with a plurality of adjusting studs, and the two ends of the pressing head are capable of tightly pressing on the upper surface of the oil injection pump and the top end of the adjusting stud, respectively. A dismounting unit is arranged on one side of the fixed platform and is capable of moving along the length direction of the fixed platform, and the dismounting unit comprises a base, a sleeve, a bushing and a mandrel, the base is provided with a guide hole, the sleeve is inserted into the guide hole and is capable of rotating in the guide hole, the bushing is screwed with the sleeve, and the mandrel is inserted into the bushing and is capable of rotating in the bushing, and the end of the mandrel close to the fixed platform is fixed with a dismounting head. By rotating the sleeve, the bushing drives the mandrel to approach the oil injection pump. The pressing unit further comprises a guide rod, the middle part of the pressing head is sleeved on the guide rod, and the top end of the guide rod is provided with a thread, and a pressing nut is screwed with the top end of the guide rod and is capable of tightly pressing on the pressing head.

2. The oil injection pump large grommet dismounting tool according to claim 1, characterized in that: A return spring is sleeved on the guide rod, one end of the return spring tightly abuts against the upper surface of the fixed platform, and the other end is capable of abutting against the lower surface of the pressing head.

3. The oil injection pump large grommet dismounting tool according to claim 2, characterized in that: A supporting nut is screwed with the bottom end of the adjusting stud, and the supporting nut is capable of tightly abutting against the upper surface of the fixed platform.

4. The oil injection pump large grommet dismounting tool according to claim 2, characterized in that: At least one slide rod is arranged on one side of the fixed platform, and the base is slidingly connected with the slide rod.

5. The fuel injection pump large grommet dismounting tool of claim 1, wherein: A plurality of positioning holes are formed in the slide rod, and the base is provided with a positioning unit, the positioning unit comprises a positioning column and a lever, and the side of the positioning column is provided with a notch, and the lever is capable of rotating around the middle part thereof, and one end of the lever is inserted into the notch.

6. The fuel injection pump large grommet dismounting tool of claim 5, wherein: The positioning column extends upwardly to form a spring rod, the diameter of the spring is smaller than that of the positioning column, a positioning spring is sleeved on the spring rod, and one end of the positioning unit abuts against the base, and the other end abuts against the top end of the positioning column.

7. The oil injection pump large grommet dismounting tool according to claim 6, characterized in that: The middle part of the sleeve extends outwardly to form a positioning edge, one end of the guide hole is provided with a positioning groove along the circumference, the positioning edge is located in the positioning groove, and a pressing ring is fixedly connected with the base and is capable of abutting against the positioning edge on the inner side.

8. The oil injection pump large grommet dismounting tool according to claim 1, characterized in that: The dismounting head and the end of the mandrel are connected through a key, so that the dismounting head and the mandrel rotate synchronously.

9. The oil injection pump large grommet dismounting tool according to claim 1, characterized in that: A plurality of positioning blocks are fixedly arranged on the edge of the fixed platform.

10. The fuel injection pump large grommet dismounting tool of claim 1, wherein: ​

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