Removal tool for bushing of oil injector

Abstract

The utility model belongs to the technical field of fuel injector bush dismounting, and discloses a fuel injector bush dismounting tool which specifically comprises a base and a plurality of connecting blocks, the base is connected to one of the connecting blocks, and the connecting blocks are sequentially connected in the axial direction of a fuel injector bush. The base and the multiple connecting blocks can move synchronously, the outer walls of the connecting blocks are provided with matching parts, the multiple connecting blocks are used for being arranged corresponding to the at least two bush sections, and the matching parts can be matched with the inner walls of the bush sections so that the matching parts and the bush sections can move synchronously in the axial direction of the oil sprayer bush. Therefore, the base can drive the multiple connecting blocks to move synchronously so as to pull out the oil injector bush in the axial direction of the oil injector bush, and disassembly of the oil injector bush is completed. In addition, the matching parts of the multiple connecting blocks can be matched with the inner walls of the at least two lining sections, in the process of pulling out the base, the at least two lining sections of the oil sprayer lining are stressed at the same time, and the overall stress of the oil sprayer lining is balanced.

Description

Technical Field

[0001] The utility model relates to the technical field of disassembling a fuel injector bushing, in particular to a tool for disassembling a fuel injector bushing. Background Art

[0002] The injector is usually arranged in the injector mounting hole of the cylinder head, and an injector bushing is arranged between the injector and the hole wall of the injector mounting hole. During the assembly process of the injector bushing and the cylinder head, if the size of the injector bushing is not suitable, the injector bushing needs to be removed and replaced. In addition, after the engine has been working for a long time, the injector bushing may leak, and the injector bushing also needs to be removed.

[0003] In this regard, the prior art provides a tool for disassembling the injector bushing, which specifically uses a tap part to tap the bushing. After tapping the inner wall of the bushing, the tap part is threadedly connected to the bushing, and can drive the tap part to move to pull out the bushing. However, the problem is that the injector bushing is generally composed of multiple bushing segments connected in sequence, and the tap part of this solution can only cooperate with one of the multiple bushing segments, which easily leads to uneven force on the injector bushing during removal. Utility Model Content

[0004] According to one aspect of the utility model, the utility model provides an injector bushing removal tool to solve the problem in the prior art that the tap portion can only cooperate with one of the multiple bushing sections, which easily leads to uneven force on the injector bushing during removal.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An injector bushing removal tool, used for removing the injector bushing from the cylinder head, wherein the injector bushing comprises a plurality of bushing segments connected in sequence along the axial direction thereof;

[0007] The injector bushing removal tool comprises:

[0008] Base;

[0009] There are multiple connecting blocks, the base is connected to one of the connecting blocks, the multiple connecting blocks are connected in sequence along the axial direction of the injector bushing, the base and the multiple connecting blocks can move synchronously, the outer wall of the connecting block has a matching portion, the multiple connecting blocks are used to be arranged corresponding to at least two of the bushing segments, and the matching portion can match with the inner wall of the bushing segment, so that the matching portion and the bushing segment can move synchronously along the axial direction of the injector bushing.

[0010] As a preferred solution of the injector bushing removal tool, the mating portion is a tap, and the tap can tap an internal thread on the inner wall of the bushing segment.

[0011] As a preferred solution of the injector bushing removal tool, a plurality of the connecting blocks are threadedly connected in sequence, and the base is threadedly connected to one of the connecting blocks.

[0012] As a preferred solution of the injector bushing removal tool, the plurality of connecting blocks are each provided with an internal threaded hole, and the base has an external thread, and the external thread can be threadably matched with the internal threaded hole of any of the connecting blocks.

[0013] As a preferred solution of the injector bushing removal tool, the connecting block has a clamping surface for cooperating with a wrench.

[0014] As a preferred solution of the injector bushing removal tool, one end of the base is threadedly connected to one of the connecting blocks, and the other end is provided with a wrench mounting hole.

[0015] As a preferred solution of the injector bushing removal tool, the connecting block closest to the bottom wall of the cylinder head is provided with a guide rod protruding along the axial direction of the injector bushing.

[0016] As a preferred solution of the injector bushing removal tool, it also includes a weight that is slidably sleeved on the base along the axial direction of the injector bushing, and a protrusion is convexly provided on the outer wall of the base. The weight can abut against the protrusion along the axial direction of the injector bushing.

[0017] As a preferred solution of the injector bushing removal tool, the base is connected to the connecting block farthest from the bottom wall of the cylinder head, and the outer diameter of the connecting block farthest from the bottom wall of the cylinder head is greater than the outer diameter of the base.

[0018] As a preferred embodiment of the injector bushing removal tool, the cylinder head has an injector mounting hole and a connecting hole connected to the injector mounting hole, the connecting hole is located at one end of the injector mounting hole away from the bottom wall of the cylinder head, the injector bushing is installed in the injector mounting hole, and a portion of the outer wall of the connecting block farthest from the bottom wall of the cylinder head is in contact with the inner wall of the connecting hole.

[0019] The beneficial effects of the utility model are:

[0020] The utility model provides an injector bushing removal tool, which is used to remove the injector bushing from the cylinder head. The injector bushing includes a plurality of bushing segments connected in sequence along its axial direction. The injector bushing removal tool specifically includes a base and a connecting block. The connecting blocks are provided with a plurality of them. The base is connected to one of the connecting blocks. The plurality of connecting blocks are connected in sequence along the axial direction of the injector bushing. The base and the plurality of connecting blocks can move synchronously. The outer wall of the connecting block has a matching portion. The plurality of connecting blocks are used to be arranged correspondingly with at least two bushing segments, and the matching portion can match with the inner wall of the bushing segment so that the matching portion and the bushing segment can move synchronously along the axial direction of the injector bushing, so that the plurality of connecting blocks can be driven to move synchronously through the base to pull out the injector bushing in the axial direction of the injector bushing, thereby completing the removal of the injector bushing. In addition, the matching portions of the plurality of connecting blocks can match with the inner walls of at least two bushing segments. In the process of pulling out the base, at least two bushing segments of the injector bushing are subjected to force at the same time, and the injector bushing is subjected to balanced force as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The structure diagram of the fuel injector bushing removal tool in the embodiment of the utility model is shown in FIG. Figure 1 ;

[0022] Figure 2 It is an exploded view of the injector bushing removal tool in the embodiment of the utility model;

[0023] Figure 3 The structure diagram of the fuel injector bushing removal tool in the embodiment of the utility model is shown in FIG. Figure 2 ;

[0024] Figure 4 The structure diagram of the fuel injector bushing removal tool in the embodiment of the utility model is shown in FIG. Figure 3 ;

[0025] Figure 5 The working process of the fuel injector bushing removal tool in the embodiment of the utility model is shown in FIG. Figure 1 ;

[0026] Figure 6 The working process of the fuel injector bushing removal tool in the embodiment of the utility model is shown in FIG. Figure 2 ;

[0027] Figure 7 yes Figure 6 Enlarged view of point A in the middle.

[0028] In the figure:

[0029] 100. Injector bushing; 110. Bushing section;

[0030] 200, cylinder head; 210, injector mounting hole; 220, connection hole;

[0031] 300, base; 310, external thread; 320, wrench mounting hole; 330, base clamping groove; 340, protrusion;

[0032] 400, connecting block; 410, matching portion; 420, internal thread hole; 430, external thread of connecting block; 440, clamping groove; 450, guide rod;

[0033] 500. Heavy hammer. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 the present invention can be understood according to specific circumstances.

[0036] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0038] An injector bushing is arranged between the injector and the wall of the injector mounting hole. In some cases, the injector bushing needs to be removed. In this regard, the prior art provides a disassembly tool for the injector bushing, which specifically uses a tap part to tap the bushing. The tap part is threadedly connected to the bushing after tapping the inner wall of the bushing, and can drive the tap part to move to pull out the bushing. However, the problem is that the injector bushing is generally composed of multiple bushing segments connected in sequence, and the tap part of this solution can only cooperate with one of the multiple bushing segments, which easily leads to uneven force on the injector bushing during the removal process.

[0039] In view of the above problems, this embodiment provides an injector bushing removal tool to solve the problem in the prior art that the tap portion can only cooperate with one of the multiple bushing segments, which easily leads to uneven force on the injector bushing during removal. The tool can be used in the technical field of injector bushing removal.

[0040] Reference Figure 1-Figure 7 The injector bushing removal tool is used to remove the injector bushing 100 from the cylinder head 200. The injector bushing 100 includes a plurality of bushing segments 110 sequentially connected along its axial direction, wherein the diameter of the bushing segment 110 close to the bottom wall of the cylinder head 200 is smaller than the diameter of the bushing segment 110 far from the bottom wall of the cylinder head 200. In this embodiment, the injector bushing 100 is installed on the cylinder head 200 in a vertical direction, that is, the axial direction of the injector bushing 100 is a vertical direction.

[0041] Continue to refer to Figure 1-Figure 7 The injector bushing removal tool includes a base 300 and a connecting block 400, wherein a plurality of connecting blocks 400 are provided, wherein the base 300 is connected to one of the connecting blocks 400, wherein the plurality of connecting blocks 400 are sequentially connected along the axial direction of the injector bushing 100, wherein the base 300 and the plurality of connecting blocks 400 can move synchronously, wherein the outer wall of the connecting block 400 has a matching portion 410, wherein the plurality of connecting blocks 400 are used to be arranged corresponding to at least two bushing segments 110, and the matching portion 410 can match with the inner wall of the bushing segment 110, so that the matching portion 410 and the bushing segment 110 can move synchronously along the axial direction of the injector bushing 100, thereby enabling the plurality of connecting blocks 400 to move synchronously through the base 300, so as to pull out the injector bushing 100 along the axial direction of the injector bushing 100, thereby completing the removal of the injector bushing 100. In addition, the mating portions 410 of the plurality of connection blocks 400 can be mated with the inner walls of at least two bushing segments 110. During the process of pulling out the base 300, at least two bushing segments 110 of the injector bushing 100 are stressed at the same time, and the injector bushing 100 is stressed evenly as a whole.

[0042] Optionally, the number of connecting blocks 400 and bushing segments 110 is the same, and multiple connecting blocks 400 are arranged in a one-to-one correspondence with multiple bushing segments 110, so that tension can be applied to multiple bushing segments 110 at the same time through multiple connecting blocks 400, further balancing the overall force of the injector bushing 100.

[0043] Continue to refer to Figure 1-Figure 7 The mating portion 410 is a tap, which can tap an internal thread on the inner wall of the bushing segment 110. The internal thread can be tapped on the inner wall of the bushing segment 110 by the tap, and the tap and the internal thread are matched, so that the mating portion 410 and the bushing segment 110 can move synchronously along the axial direction of the injector bushing 100.

[0044] As an alternative, the mating portion 410 can also be a structure with an adjustable outer wall size. For example, the mating portion 410 includes a base shaft and a plurality of movable parts arranged on the base shaft. The movable parts can move radially along the base shaft, thereby changing the distance between the movable parts and the base shaft to change the size of the outer wall of the mating portion 410, so that the outer wall of the mating portion 410 is interference fit with the inner wall of the bushing segment 110, so that the mating portion 410 can also drive the bushing segment 110 to move axially along the injector bushing 100.

[0045] Continue to refer to Figure 1-Figure 7 , the multiple connection blocks 400 are threadedly connected in sequence, and the base 300 is threadedly connected to one of the connection blocks 400, so as to facilitate the disassembly and assembly between the base 300 and the multiple connection blocks 400, and different numbers of connection blocks 400 can be connected according to the number of bushing segments 110. In other embodiments, the base 300 and the multiple connection blocks 400 can be integrally formed, so that the step of installing the connection blocks 400 can be omitted, but the specific number of the connection blocks 400 cannot be adjusted.

[0046] Continue to refer to Figure 1-Figure 7, multiple connection blocks 400 are all provided with internal thread holes 420, and the base 300 has external threads 310, which can be threadedly matched with the internal thread holes 420 of any connection block 400, that is, the internal diameters of the internal thread holes 420 of multiple connection blocks 400 are the same. Among the multiple bushing segments 110, the bushing segment 110 closest to the bottom wall of the cylinder head 200 is the end bushing, and the remaining bushing segments 110 are non-end bushings. Among the multiple connection blocks 400, the end connection block is used to match the end bushing, and the remaining connection blocks 400 are non-end connection blocks. The non-end connection block is also provided with a connection block external thread 430, which is used to threadably match with the internal thread holes 420 of other connection blocks 400, wherein the external thread 310 of the base 300 and the external thread 430 of the connection block have the same outer diameter. In this way, the number of connecting blocks 400 can be determined according to the number of bushing segments 110 , and different connecting blocks 400 can be connected according to the specific size of each bushing segment 110 , so that the injector bushing removal tool can accurately adapt to the injector bushing 100 .

[0047] Optionally, the base 300 has an abutment surface at the end of the external thread 310. After the external thread 310 is installed into the internal thread hole 420 of the connection block 400 and screwed into place, the abutment surface abuts against the connection block 400. At this time, when the base 300 is rotated in the direction of tightening the thread again, the connection block 400 can be driven to rotate synchronously, thereby driving the matching portion 410 to move and perform tapping. Similarly, the non-end connection block also has a connection block abutment surface at the end of the connection block external thread 430. After the connection block external thread 430 is installed into the internal thread hole 420 of another connection block 400 and screwed into place, the connection block abutment surface abuts against the connection block 400.

[0048] In addition, in order to solve the problem that tapping multiple matching parts 410 at the same time will cause tapping difficulties, the base 300 can also be connected to only one connection block 400 at a time, and the bushing section 110 is tapped in sequence. After the tapping is completed, multiple connection blocks 400 are connected at the same time and assembled to the base 300, and the injector bushing removal tool is reinstalled on the injector bushing 100 to complete the removal of the injector bushing 100. For example, in this embodiment, the number of bushing sections 110 is two, of which the bushing section 110 closest to the bottom wall of the cylinder head 200 is an end bushing, and the other is a non-end bushing. The number of connection blocks 400 is also two, and the connection block 400 used to match the end bushing is an end connection block, and the other is a non-end connection block. The inner diameters of the internal threaded holes 420 of the two connection blocks 400 are the same, and the non-end connection block is provided with a connection block external thread 430. The external thread 310 of the base 300 and the external thread 430 of the connection block are the same in outer diameter. The specific disassembly process of the injector bushing 100 is as follows:

[0049] First, screw the external thread 310 of the base 300 into the internal thread hole 420 of the non-end connecting block in the forward direction, and insert the assembled injector bushing removal tool into the interior of the cylinder head 200. By rotating the base 300 in the forward direction, the base 300 drives the non-end connecting block to rotate, and taps the non-end bushing through the matching part 410, and then rotates in the reverse direction to take out the base 300 and the non-end connecting block, and remove the non-end connecting block from the base 300.

[0050] Then, the external thread 310 of the base 300 is screwed forward into the internal thread hole 420 of the end connecting block, and the assembled injector bushing removal tool is inserted into the interior of the cylinder head 200. By rotating the base 300 forward, the base 300 drives the end connecting block to rotate, and the end bushing is tapped through the matching portion 410, and then rotated in the right direction to take out the base 300 and the end connecting block, and remove the end connecting block from the base 300.

[0051] Finally, the base 300, the non-end connection block and the end connection block are connected in sequence and screwed into the injector bushing 100 in a forward direction so that the matching portion 410 of the non-end connection block cooperates with the thread tapped on the non-end bushing, and the matching portion 410 of the end connection block cooperates with the thread tapped on the end bushing. Pulling the base 300 can drive the injector bushing 100 to move synchronously, thereby pulling out the injector bushing 100 to complete the disassembly.

[0052] Continue to refer to Figure 1-Figure 7 The connection block 400 has a clamping surface 440 for cooperating with a wrench, so that it is convenient for the user to screw the connection block 400 with the wrench. Optionally, the base 300 also has a base clamping surface 330.

[0053] Continue to refer to Figure 1-Figure 7 One end of the base 300 is threadedly connected to one of the connecting blocks 400, and the other end is provided with a wrench mounting hole 320. The wrench mounting hole 320 can be specifically used to connect a pneumatic wrench, wherein the output end of the pneumatic wrench is a square shaft, and the wrench mounting hole 320 is a square hole. The two can cooperate with each other to transmit power, and the user can drive the base 300 to rotate through the pneumatic wrench.

[0054] Continue to refer to Figure 1-Figure 7 The end connecting block does not need to be provided with a connecting block external thread 430. In order to facilitate the positioning of the movement of the end connecting block, the connecting block 400 closest to the bottom wall of the cylinder head 200 is provided with a guide rod 450 along the axial direction of the injector bushing 100, that is, the end connecting block is provided with a guide rod 450, thereby guiding and positioning the end connecting block.

[0055] Continue to refer to Figure 1-Figure 7The fuel injector bushing removal tool also includes a weight 500 that is slidably sleeved on the base 300 along the axial direction of the fuel injector bushing 100. The outer wall of the base 300 is convexly provided with a protrusion 340. The weight 500 can abut against the protrusion 340 along the axial direction of the fuel injector bushing 100. After the user sequentially connects and screws the base 300, the non-end connection block and the end connection block into the fuel injector bushing 100, the user can operate the weight 500 to move in a direction close to the protrusion 340, so that the weight 500 applies a certain inertial force to the protrusion 340. The fuel injector bushing removal tool and the fuel injector bushing 100 can be pulled out by the inertial force by repeatedly moving the weight 500. Among them, the protrusion 340 is located at an end away from the connection block 400, and the wrench installation hole 320 is opened in the protrusion 340.

[0056] Continue to refer to Figure 1-Figure 7 The base 300 is connected to the connecting block 400 which is farthest from the bottom wall of the cylinder head 200, and the outer diameter of the connecting block 400 which is farthest from the bottom wall of the cylinder head 200 is larger than the outer diameter of the base 300. Therefore, the heavy hammer 500 mounted on the base 300 can be limited by the connecting block 400 which is farthest from the bottom wall of the cylinder head 200, so as to prevent the heavy hammer 500 from falling off the base 300 during use, and to prevent the heavy hammer 500 from directly hitting the cylinder head 200 and causing damage to the cylinder head 200.

[0057] Continue to refer to Figure 1-Figure 7 The cylinder head 200 has an injector mounting hole 210 and a connecting hole 220 connected to the injector mounting hole 210. The connecting hole 220 is located at one end of the injector mounting hole 210 away from the bottom wall of the cylinder head 200. The injector bushing 100 is installed in the injector mounting hole 210. Part of the outer wall of the connecting block 400 farthest from the bottom wall of the cylinder head 200 is in contact with the inner wall of the connecting hole 220 to play a guiding role and prevent the angle of the injector bushing removal tool from being offset during the process of extending into the connecting hole 220 and the injector mounting hole 210. Specifically, the connecting block 400 farthest from the bottom wall of the cylinder head 200 has a body part and a matching part 410. The diameter of the matching part 410 is smaller than that of the body part and matches with the bushing section 110.

[0058] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A fuel injector bushing removal tool, used for removing a fuel injector bushing (100) from a cylinder head (200), wherein the fuel injector bushing (100) comprises a plurality of bushing segments (110) connected in sequence along its axial direction; It is characterized in that The injector bushing removal tool comprises: Base (300); A plurality of connecting blocks (400) are provided, the base (300) is connected to one of the connecting blocks (400), the plurality of connecting blocks (400) are connected in sequence along the axial direction of the injector bushing (100), the base (300) and the plurality of connecting blocks (400) can move synchronously, the outer wall of the connecting block (400) has a matching portion (410), the plurality of connecting blocks (400) are used to be arranged corresponding to at least two of the bushing segments (110), and the matching portion (410) can match with the inner wall of the bushing segment (110), so that the matching portion (410) and the bushing segment (110) can move synchronously along the axial direction of the injector bushing (100).

2. The injector bushing removal tool according to claim 1, characterized in that: The matching portion (410) is a tap, and the tap is capable of tapping an internal thread on the inner wall of the bushing segment (110).

3. The injector bushing removal tool according to claim 1, characterized in that: The plurality of connection blocks (400) are threadedly connected in sequence, and the base (300) is threadedly connected to one of the connection blocks (400).

4. The injector bushing removal tool according to claim 3, characterized in that: The plurality of connection blocks (400) are each provided with an internal thread hole (420), and the base (300) has an external thread (310), and the external thread (310) can be threadedly matched with the internal thread hole (420) of any of the connection blocks (400).

5. The injector bushing removal tool according to claim 3, characterized in that: The connection block (400) has a clamping surface (440) for cooperating with a wrench.

6. The injector bushing removal tool according to claim 3, characterized in that: One end of the base (300) is threadedly connected to one of the connection blocks (400), and the other end is provided with a wrench mounting hole (320).

7. The injector bushing removal tool according to any one of claims 1 to 6, characterized in that: The connecting block (400) closest to the bottom wall of the cylinder head (200) is provided with a guide rod (450) protruding along the axial direction of the injector bushing (100).

8. The injector bushing removal tool according to any one of claims 1 to 6, characterized in that: It also includes a weight (500) which is slidably sleeved on the base (300) along the axial direction of the injector bushing (100); a protrusion (340) is convexly provided on the outer wall of the base (300); and the weight (500) can abut against the protrusion (340) along the axial direction of the injector bushing (100).

9. The injector bushing removal tool according to claim 8, characterized in that: The base (300) is connected to the connection block (400) farthest from the bottom wall of the cylinder head (200), and the outer diameter of the connection block (400) farthest from the bottom wall of the cylinder head (200) is greater than the outer diameter of the base (300).

10. The injector bushing removal tool according to any one of claims 1 to 6, characterized in that: The cylinder head (200) comprises an injector mounting hole (210) and a connecting hole (220) connected to the injector mounting hole (210); the connecting hole (220) is located at one end of the injector mounting hole (210) away from the bottom wall of the cylinder head (200); the injector bushing (100) is mounted on the injector mounting hole (210); and a portion of the outer wall of the connecting block (400) farthest from the bottom wall of the cylinder head (200) is in contact with the inner wall of the connecting hole (220).

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