Disassembling and assembling tool

Abstract

The utility model discloses a dismounting and mounting tool, which is used for dismounting and mounting an oil pipe, the dismounting and mounting tool comprises a sleeve, a connecting arm and a wrench connector, the sleeve is provided with a matching cavity used for being matched with a fastener, a first receding groove used for receding the oil pipe is formed on the sleeve, the first receding groove is communicated with the matching cavity, the sleeve is connected to one end of the connecting arm, and the wrench connector is connected to the other end of the connecting arm. A second receding groove used for receding the oil pipe is formed in the connecting arm, the second receding groove communicates with the first receding groove, and the wrench connector is connected to the other end of the connecting arm and used for being connected with a wrench. According to the disassembling and assembling tool, interference between the disassembling and assembling tool and an oil pipe can be avoided, the torque of the wrench can be well transmitted to the sleeve through the wrench connector and the connecting arm, the disassembling and assembling tool can complete disassembling and assembling of an oil pipe fastener more flexibly, the requirement for space of the disassembling and assembling tool is low, and the disassembling and assembling tool is convenient to use. For example, tightening of a fastener can be completed in a narrow space, so that the situation of oil leakage caused by improper assembly of an oil pipe is reduced.

Description

Technical Field

[0001] The utility model relates to the field of installation tools, and in particular to a disassembly and assembly tool. Background Art

[0002] In the related art, both ends of an oil pipe are usually connected by lock nuts. Since there is an oil pipe in the middle of the nut, an open-end wrench is commonly used to tighten the nut. However, during the assembly of the oil pipe, for example, when there are components blocking around the oil pipe, there is a narrow assembly space. When using an open-end wrench, the tail of the wrench is prone to interference with the surrounding components, resulting in the open-end wrench being unable to fit well onto the relevant nut, and the set tightening torque of the wrench actually not meeting the requirement of the set tightening torque. This can easily cause the oil pipe to leak due to improper assembly. Therefore, this problem needs to be solved. Content of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, an object of the utility model is to provide a disassembly and assembly tool. By providing a mating cavity on the sleeve for mating with a fastener, and a first avoidance groove for avoiding the oil pipe formed on the sleeve, and a second avoidance groove for avoiding the oil pipe formed on the connecting arm, interference between the disassembly and assembly tool and the oil pipe can be avoided, and the torque of the wrench can be better transmitted to the sleeve through the wrench connecting head and the connecting arm, enabling the disassembly and assembly tool to more flexibly complete the disassembly and assembly of the oil pipe fastener. The disassembly and assembly tool has lower requirements for space. For example, it can complete the tightening of the fastener in a narrow space to reduce the oil leakage caused by improper assembly of the oil pipe.

[0004] The disassembly and assembly tool according to an embodiment of the utility model is used for disassembling and assembling an oil pipe. The disassembly and assembly tool includes: a sleeve having a mating cavity for mating with a fastener, and a first avoidance groove for avoiding the oil pipe formed on the sleeve, the first avoidance groove communicating with the mating cavity; a connecting arm, the sleeve being connected to one end of the connecting arm, and a second avoidance groove for avoiding the oil pipe formed on the connecting arm, the second avoidance groove communicating with the first avoidance groove; and a wrench connecting head connected to the other end of the connecting arm and used for connecting a wrench.

[0005] The disassembly and assembly tool according to an embodiment of the utility model, by providing a mating cavity on the sleeve for mating with a fastener, and a first avoidance groove for avoiding the oil pipe formed on the sleeve, and a second avoidance groove for avoiding the oil pipe formed on the connecting arm, interference between the disassembly and assembly tool and the oil pipe can be avoided, and the torque of the wrench can be better transmitted to the sleeve through the wrench connecting head and the connecting arm, enabling the disassembly and assembly tool to more flexibly complete the disassembly and assembly of the oil pipe fastener. The disassembly and assembly tool has lower requirements for space. For example, it can complete the tightening of the fastener in a narrow space to reduce the oil leakage caused by improper assembly of the oil pipe.

[0006] According to some embodiments of the present utility model, the sleeve includes a cylindrical body portion and a cylindrical top portion. Axial ends of the cylindrical body portion are open. The cylindrical top portion is connected to one axial end of the cylindrical body portion and the cylindrical top portion is connected to one end of the connecting arm. The cylindrical body portion and the cylindrical top portion jointly define the mating cavity. The first relief groove axially penetrates the cylindrical top portion along the axial direction of the cylindrical body portion and radially penetrates the side wall of the cylindrical body portion.

[0007] According to some embodiments of the present utility model, the second relief groove extends along the length direction of the connecting arm, and a cross-section of the second relief groove is arc-shaped.

[0008] According to some embodiments of the present utility model, the sleeve and the wrench connector are coaxially arranged, and the connecting arm is offset to one side of the central axis of the sleeve or the wrench connector; and / or, the disassembly and assembly tool is an integrally formed part.

[0009] According to some embodiments of the present utility model, a wrench interface is formed on the wrench connector, and the wrench interface is used to connect with the wrench, and the wrench interface and the sleeve are coaxially arranged.

[0010] According to some embodiments of the present utility model, the wrench interface includes an interface main body and an extension groove. A cross-section of the interface main body is polygonal, and the extension groove is formed on an inner peripheral wall of the interface main body and is located at an edge of the interface main body.

[0011] According to some embodiments of the present utility model, it includes a manual operating rod, and the manual operating rod is connected to an outer peripheral wall of the wrench connector.

[0012] According to some embodiments of the present utility model, at least one of the sleeve, the connecting arm, and the wrench connector is a stainless steel part.

[0013] According to some embodiments of the present utility model, at least one of the sleeve, the connecting arm, and the wrench connector is a martensitic stainless steel part.

[0014] According to some embodiments of the present utility model, the hardness of at least one of the sleeve, the connecting arm, and the wrench connector is 58 - 62 HRC.

[0015] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0017] Figure 1 Schematic diagram of a disassembly and assembly tool for disassembling and assembling an oil pipe according to some embodiments of the present utility model;

[0018] Figure 2 is Figure 1 a three-dimensional schematic diagram of the disassembly and assembly tool in

[0019] Figure 3 is Figure 1 a three-dimensional schematic diagram of the disassembly and assembly tool from another angle in

[0020] Reference numerals:

[0021] 100, disassembly and assembly tool;

[0022] 1, sleeve; 11, mating cavity; 12, first relief groove; 13, barrel portion; 14, barrel top;

[0023] 2, connecting arm; 21, second relief groove;

[0024] 3, wrench connecting head; 31, wrench interface; 311, interface body; 312, extension groove;

[0025] 4, manual operating rod;

[0026] 51, oil pipe; 52, fastener. Detailed implementation manners

[0027] The embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0028] Reference will be made below to Figures 1-3 describe the disassembly and assembly tool 100 according to an embodiment of the present utility model.

[0029] Referring to Figures 1-3 , the disassembly and assembly tool 100 according to an embodiment of the present utility model is used for disassembling and assembling an oil pipe 51. The disassembly and assembly tool 100 includes a sleeve 1, a connecting arm 2, and a wrench connecting head 3. The sleeve 1 has a mating cavity 11 for mating with a fastener 52. A first relief groove 12 for avoiding the oil pipe 51 is formed on the sleeve 1. The first relief groove 12 communicates with the mating cavity 11. The sleeve 1 is connected to one end of the connecting arm 2. A second relief groove 21 for avoiding the oil pipe 51 is formed on the connecting arm 2. The second relief groove 21 communicates with the first relief groove 12. The wrench connecting head 3 is connected to the other end of the connecting arm 2 and the wrench connecting head 3 is used for connecting a wrench.

[0030] The sleeve 1 is used to transfer torque to the fastener 52 when disassembling and assembling the fastener 52. A first relief groove 12 is formed on the sleeve 1. The first relief groove 12 is used to avoid the oil pipe 51, reducing or avoiding interference between the disassembly and assembly tool 100 and the oil pipe 51 when disassembling and assembling the fastener 52. One end of the connecting arm 2 is connected to the sleeve 1, which is used to increase or decrease the rotation angle of the sleeve 1. A second relief groove 21 is formed on the connecting arm 2. The second relief groove 21 is used to avoid the oil pipe 51, reducing or avoiding interference between the disassembly and assembly tool 100 and the oil pipe 51 when disassembling and assembling the fastener 52. The wrench connector 3 is connected to the other end of the connecting arm 2 and is used to connect a wrench. The first relief groove 12 communicates with the second relief groove 21, so that the oil pipe 51 passing through the first relief groove 12 can directly pass through the second relief groove 21, which can prevent the connecting arm 2 or the sleeve 1 from interfering with the oil pipe 51. When using the disassembly and assembly tool 100, the wrench connector 3 is connected to the wrench, so that the oil pipe 51 passes through the first relief groove 12 and the second relief groove 21. The sleeve 1 cooperates with the fastener 52, and turning the wrench can disassemble and assemble the fastener 52.

[0031] For example, there are components around the oil pipe 51, and the fastener 52 is in a relatively deep position. When using the disassembly and assembly tool 100 to disassemble and assemble the oil pipe 51, the sleeve 1 can be extended into the fastener 52 through the connecting arm 2 to facilitate the cooperation between the sleeve 1 and the fastener 52, and interference with the components around the oil pipe 51 can be avoided. The first relief groove 12 and the second relief groove 21 on the disassembly and assembly tool 100 can avoid interference between the disassembly and assembly tool 100 and the oil pipe 51. By connecting the wrench connector 3 at the other end of the connecting arm 2 to the wrench, the torque can be transmitted to the sleeve 1 to realize the tightening and removal of the fastener 52, making the operation space requirement of the disassembly and assembly tool 100 lower. For example, the tightening and removal of the fastener 52 can also be completed in a narrow space.

[0032] Optionally, the width of the first relief groove 12 is greater than the outer diameter of the oil pipe 51. For example, there is an oil pipe 51 protruding in the middle of the fastener 52 of the high-pressure oil pipe 51. By setting the width of the first relief groove 12 to be greater than the outer diameter of the oil pipe 51, when the sleeve 1 cooperates with the fastener 52, the first relief groove 12 is set to avoid the oil pipe 51, which can prevent the oil pipe 51 from interfering with the sleeve 1.

[0033] The disassembly and assembly tool 100 according to an embodiment of the present utility model is provided with a mating cavity 11 on the sleeve 1 that mates with the fastener 52, and a first relief groove 12 for avoiding the oil pipe 51 is formed on the sleeve 1, and a second relief groove 21 for avoiding the oil pipe 51 is formed on the connecting arm 2, which can prevent the disassembly and assembly tool 100 from interfering with the oil pipe 51, and the torque of the wrench can be better transmitted to the sleeve 1 through the wrench connector 3 and the connecting arm 2, so that the disassembly and assembly tool 100 can more flexibly complete the disassembly and assembly of the fastener 52 of the oil pipe 51. The disassembly and assembly tool 100 has lower requirements for space. For example, the fastener 52 can be tightened in a narrow space to reduce the oil leakage caused by improper assembly of the oil pipe 51.

[0034] Referring to Figures 1-3 , according to some embodiments of the present utility model, the sleeve 1 includes a cylindrical body portion 13 and a cylindrical top portion 14. The axial ends of the cylindrical body portion 13 are open. The cylindrical top portion 14 is connected to one axial end of the cylindrical body portion 13 and the cylindrical top portion 14 is connected to one end of the connecting arm 2. The cylindrical body portion 13 and the cylindrical top portion 14 jointly define the mating cavity 11. The first relief groove 12 axially penetrates the cylindrical top portion 14 along the axial direction of the cylindrical body portion 13 and the first relief groove 12 radially penetrates the side wall of the cylindrical body portion 13 along the radial direction of the cylindrical body portion 13. The mating cavity 11 can facilitate the accommodation of the fastener 52 therein, so as to facilitate the cooperation between the sleeve 1 and the fastener 52 to realize the tightening or removal of the fastener 52. The first relief groove 12 axially penetrates the cylindrical top portion 14 along the axial direction of the cylindrical body portion 13 and the first relief groove 12 radially penetrates the side wall of the cylindrical body portion 13 along the radial direction of the cylindrical body portion 13, which can ensure that the oil pipe 51 on the fastener 52 can be accommodated in the first relief groove 12 when the sleeve 1 cooperates with the fastener 52, preventing the sleeve 1 from interfering with the oil pipe 51.

[0035] Referring to Figures 1-3 , according to some embodiments of the present utility model, the second relief groove 21 extends along the length direction of the connecting arm 2, and the cross section of the second relief groove 21 is arc-shaped, so that the cross section of the second relief groove 21 has a smooth transition. When the oil pipe 51 is accommodated in the second relief groove 21, the scratching between the oil pipe 51 and the second relief groove 21 can be reduced.

[0036] Optionally, the width of the second relief groove 21 is greater than the outer diameter of the oil pipe 51. For example, there is an oil pipe 51 protruding from the middle of the fastener 52 of the high-pressure oil pipe 51. By making the width of the second relief groove 21 greater than the outer diameter of the oil pipe 51, when the disassembly and assembly tool 100 disassembles and assembles the fastener 52, the second relief groove 21 is provided to avoid the oil pipe 51, which can prevent the oil pipe 51 from interfering with the connecting arm 2.

[0037] Optionally, the length of the second avoidance groove 21 exceeds the bent portion of the oil pipe 51. This portion is also used to avoid the oil pipe 51, and the extended section of the length can also avoid the oil pipe 51. When the disassembly and assembly tool 100 is rotated, the disassembly and assembly tool 100 will not interfere with the oil pipe 51 within a certain rotation angle, effectively preventing the oil pipe 51 from leaking due to interference.

[0038] Referring to Figures 1-3 , according to some embodiments of the present invention, the sleeve 1 and the wrench connection head 3 are coaxially arranged, and the connecting arm 2 is offset to one side of the central axis of the sleeve 1 or the wrench connection head 3. The sleeve 1 and the wrench connection head 3 are coaxially arranged, the sleeve 1 cooperates with the fastener 52, and the wrench connection head 3 cooperates with the wrench. In this way, the force application points of the wrench connection head 3 and the sleeve 1 can be coaxial. During use, the force transmission can be made more uniform and stable, reducing the influence of eccentric moments and improving the accuracy of torque transmission. The connecting arm 2 is offset to one side of the central axis of the sleeve 1 or the wrench connection head 3, so that the connecting arm 2 can better avoid the oil pipe 51 and prevent interference between the connecting arm 2 and the oil pipe 51.

[0039] Referring to Figures 1-3 , according to some embodiments of the present invention, the disassembly and assembly tool 100 is an integrally formed part, which can improve the overall structural strength of the disassembly and assembly tool 100 and can eliminate the assembly process between the sleeve 1, the connecting arm 2 and the wrench connection head 3.

[0040] Referring to Figures 1-3 , according to some embodiments of the present invention, the sleeve 1 and the wrench connection head 3 are coaxially arranged, and the connecting arm 2 is offset to one side of the central axis of the sleeve 1 or the wrench connection head 3; and the disassembly and assembly tool 100 is an integrally formed part. The coaxial arrangement of the sleeve 1 and the wrench connection head 3 can make the force transmission more uniform and stable, reducing the influence of eccentric moments. The connecting arm 2 is offset to one side of the central axis of the sleeve 1 or the wrench connection head 3, so that the connecting arm 2 can better avoid the oil pipe 51. The integrally formed disassembly and assembly tool 100 can improve the overall structural strength of the disassembly and assembly tool 100.

[0041] Referring to Figures 1-3 , according to some embodiments of the present invention, a wrench interface 31 is formed on the wrench connection head 3. The wrench interface 31 is used to connect with the wrench, and the wrench interface 31 is coaxially arranged with the sleeve 1. The wrench interface 31 can facilitate the connection between the wrench and the disassembly and assembly tool 100 to apply torque to the disassembly and assembly tool 100. The wrench interface 31 is coaxially arranged with the sleeve 1, so that the force application point of the wrench and the force application point of the sleeve 1 can be coaxial. Furthermore, the force application point of the wrench and the force application point of the fastener 52 can be coaxial. During use, the force transmission can be made more uniform and stable, reducing the influence of eccentric moments and ensuring the accuracy of the torque.

[0042] For example, the wrench interface 31 is a blind hole. In this way, when using a wrench to rotate the disassembly and assembly tool 100, the wrench will not enter the second avoidance groove 21 and contact the oil pipe 51, which can prevent the oil pipe 51 from being damaged due to friction with the wrench during rotation.

[0043] Referring to Figures 1-3 , according to some embodiments of the present invention, the wrench interface 31 includes an interface main body 311 and an extension groove 312. The cross-section of the interface main body 311 is polygonal, and the extension groove 312 is formed on the inner peripheral wall of the interface main body 311 and the extension groove 312 is located at the corner of the interface main body 311. The extension groove 312 can be used to avoid the protrusions on the outer periphery of the wrench, which can increase the versatility of the wrench interface 31 and facilitate the cooperation of the wrench interface 31 with wrenches of various shapes. For example, protrusions are formed on the outer periphery of a polygonal wrench. By forming the extension groove 312 on the inner peripheral wall of the interface main body 311 and the extension groove 312 being located at the corner of the interface main body 311, it is convenient for the wrench to be accommodated therein.

[0044] Referring to Figures 1-3 , according to some embodiments of the present invention, the disassembly and assembly tool 100 includes a manual operating rod 4, and the manual operating rod 4 is connected to the outer peripheral wall of the wrench connection head 3. The manual operating rod 4 is connected to the outer peripheral wall of the wrench connection head 3, so that the operator can directly apply force through the manual operating rod 4, which is convenient for tightening or removing the fastener 52; moreover, the setting of the manual operating rod 4 provides an operating lever, enabling the operator to complete a large torque output with a smaller force, and the operation is more labor-saving.

[0045] Referring to Figures 1-3 , according to some embodiments of the present invention, at least one of the sleeve 1, the connecting arm 2, and the wrench connection head 3 is a stainless steel part. The stainless steel part has good corrosion resistance, wear resistance, and relatively high strength. At least one of the sleeve 1, the connecting arm 2, and the wrench connection head 3 being a stainless steel part makes the disassembly and assembly tool 100 suitable for use in humid or corrosive environments, can also reduce the wear of the disassembly and assembly tool 100, extend the service life of the disassembly and assembly tool 100, and the stainless steel part has relatively high strength, can withstand a large torque and impact force, and can improve the reliability of the disassembly and assembly tool 100.

[0046] Referring to Figures 1-3, according to some embodiments of the present utility model, at least one of the sleeve 1, the connecting arm 2, and the wrench connecting head 3 is a martensitic stainless steel part. For example, the martensitic stainless steel part can be made of 9Cr18. At least one of the sleeve 1, the connecting arm 2, and the wrench connecting head 3 is a martensitic stainless steel part. After heat treatment, the martensitic stainless steel can reach a very high hardness and strength, can withstand greater torque and impact force, and the martensitic stainless steel has good corrosion resistance, making the disassembly and assembly tool 100 suitable for use in a corrosive environment. For example, the oil pipe 51 is used in a direct injection methanol engine. By having at least one of the sleeve 1, the connecting arm 2, and the wrench connecting head 3 as a martensitic stainless steel part, the possibility of the disassembly and assembly tool 100 being corroded by methanol can be reduced, and the service life of the disassembly and assembly tool 100 can be extended.

[0047] Among them, at least one of the sleeve 1, the connecting arm 2, and the wrench connecting head 3 being a martensitic stainless steel part can include the following situations: For example, it can be that the sleeve 1 or the connecting arm 2 or the wrench connecting head 3 is a martensitic stainless steel part; for another example, it can be that the sleeve 1 and the connecting arm 2 or the sleeve 1 and the wrench connecting head 3 or the connecting arm 2 and the wrench connecting head 3 are martensitic stainless steel parts; for yet another example, it can be that the sleeve 1, the connecting arm 2, and the wrench connecting head 3 are all martensitic stainless steel parts.

[0048] Refer to Figures 1-3 , according to some embodiments of the present utility model, the hardness of at least one of the sleeve 1, the connecting arm 2, and the wrench connecting head 3 is 58 - 62 HRC. For example, the hardness of at least one of the sleeve 1, the connecting arm 2, and the wrench connecting head 3 is 58 HRC, 59 HRC, 60 HRC, 61 HRC, 62 HRC, etc. By having the hardness of at least one of the sleeve 1, the connecting arm 2, and the wrench connecting head 3 be 58 - 62 HRC, this hardness range can ensure that the disassembly and assembly tool 100 has sufficient hardness, so that the disassembly and assembly tool 100 has strong wear resistance and the service life of the disassembly and assembly tool 100 can be extended.

[0049] For example, at least one of the sleeve 1, the connecting arm 2, and the wrench connecting head 3 is a martensitic stainless steel part. The martensitic stainless steel part can adopt a heat treatment process to improve the hardness and toughness of the martensitic stainless steel part. The heat treatment process can adopt the method of quenching and low-temperature tempering. First, heat the martensitic stainless steel part to the first set temperature, keep it warm and then quickly cool it to increase the hardness of the martensitic stainless steel part, and then perform low-temperature tempering treatment, heat the martensitic stainless steel part to the second set temperature to eliminate stress, improve the plasticity and toughness of the martensitic stainless steel part, and finally control the hardness of the martensitic stainless steel part at 58 - 62 HRC.

[0050] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0051] In the description of the present utility model, the "first feature" and "second feature" may include one or more of such features.

[0052] In the description of the present utility model, the meaning of "a plurality of" is two or more.

[0053] In the description of the present utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0054] In the description of the present utility model, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature.

[0055] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0056] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A disassembly and assembly tool, characterized in that, For disassembling and assembling oil pipes, the disassembly and assembly tool includes: A sleeve having a fitting cavity for fitting with a fastener, and a first avoidance groove for avoiding the oil pipe is formed on the sleeve, and the first avoidance groove communicates with the fitting cavity; A connecting arm, the sleeve is connected to one end of the connecting arm, and a second avoidance groove for avoiding the oil pipe is formed on the connecting arm, and the second avoidance groove communicates with the first avoidance groove; A wrench connecting head connected to the other end of the connecting arm and used for connecting a wrench.

2. The disassembling and assembling tool according to claim 1, wherein The sleeve includes a cylindrical body portion and a cylindrical top portion. The axial ends of the cylindrical body portion are open. The cylindrical top portion is connected to one axial end of the cylindrical body portion and the cylindrical top portion is connected to one end of the connecting arm. The cylindrical body portion and the cylindrical top portion jointly define the fitting cavity. The first avoidance groove axially penetrates the cylindrical top portion along the cylindrical body portion and radially penetrates the side wall of the cylindrical body portion.

3. The disassembling and assembling tool according to claim 1, wherein The second avoidance groove extends along the length direction of the connecting arm, and the cross section of the second avoidance groove is arc-shaped.

4. The disassembling and assembling tool according to claim 1, wherein The sleeve and the wrench connecting head are coaxially arranged, and the connecting arm is offset to one side of the central axis of the sleeve or the wrench connecting head; and / or, the disassembly and assembly tool is an integrally formed part.

5. The disassembling and assembling tool according to claim 1, characterized in that, A wrench interface is formed on the wrench connecting head, and the wrench interface is used for connecting with the wrench, and the wrench interface is coaxially arranged with the sleeve.

6. The disassembling and assembling tool according to claim 5, characterized in that The wrench interface includes an interface body and an extension groove. The cross section of the interface body is polygonal, and the extension groove is formed on the inner peripheral wall of the interface body and is located at the edge of the interface body.

7. The disassembly and assembly tool according to any one of claims 1-6, characterized in that, It includes a manual operating rod, and the manual operating rod is connected to the outer peripheral wall of the wrench connecting head.

8. The disassembling and assembling tool according to any one of claims 1-6, characterized in that, At least one of the sleeve, the connecting arm and the wrench connecting head is a stainless steel part.

9. The disassembling and assembling tool according to claim 8, characterized in that, At least one of the sleeve, the connecting arm and the wrench connecting head is a martensitic stainless steel part.

10. The disassembly and assembly tool according to any one of claims 1-6, characterized in that, The hardness of at least one of the sleeve, the connecting arm and the wrench connecting head is 58-62 HRC.

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