Fastener dismounting and mounting device

Abstract

The fastener dismounting and mounting device comprises a supporting assembly and a stretching assembly, the supporting assembly comprises a centering component and a supporting component which are connected with each other, the supporting component is arranged on the outer side of a nut in a sleeving mode, and the centering component is provided with a first molded surface; the stretching assembly is used for being connected with the stud and applying traction force to the stud, the stretching assembly is provided with a second molded surface, and the stretching assembly and the supporting assembly form molded surface fit through abutting of the first molded surface and the second molded surface. The supporting component is arranged on the outer side of the nut in a sleeving mode and abuts against the connecting rod lower cover, single-side supporting is provided for the stretching assembly connected with the stud, the stretching assembly can apply traction force to the stud conveniently, and disassembly and assembly of the nut are facilitated. The centering component connected with the supporting component and the stretching component form molded surface fit, so that the radial position of the supporting component is adjusted, a gap is formed between the supporting component and the nut, frictional resistance caused by contact between the supporting component and the nut is avoided, and the nut dismounting precision and smoothness are improved.

Description

Technical Field

[0001] This application relates to the field of fastener installation, and particularly relates to a fastener disassembly and assembly device. Background Art

[0002] When disassembling and assembling the fasteners of a connecting rod bearing, auxiliary tools are often required to pull the stud in the fastener outwards to ensure the efficiency and accuracy of the disassembly and assembly of the nut in the fastener.

[0003] The nut rotates during the disassembly and assembly process. When the auxiliary tool is sleeved on the nut, the auxiliary tool often forms a unilateral contact with the nut due to its own weight. The rotating nut will continuously rub against the auxiliary tool, hindering the rotation process of the nut and causing inconvenience to the disassembly and assembly process of the nut. In addition, during the installation process of the nut, the staff is likely to misjudge that the nut has been tightened in place according to the resistance received, resulting in the pre-tightening force not meeting the requirements during the tightening process of the nut. Utility Model Content

[0004] To solve at least one of the above technical problems, this application provides a fastener disassembly and assembly device, and the technical solution adopted is as follows:

[0005] This application provides a fastener disassembly and assembly device. The fastener disassembly and assembly device includes a support assembly and a stretching assembly. The support assembly includes a centering component and a hollow support component. The support component is used to be sleeved outside the nut and abuts against the lower connecting rod cover. The centering component is connected to the support component, and the centering component is provided with a first profile surface. The stretching assembly is arranged in parallel with the support assembly. The stretching assembly is used to connect the stud and apply a pulling force to the stud. The stretching assembly is provided with a second profile surface. The stretching assembly and the support assembly form a profile surface fit through the abutment of the first profile surface and the second profile surface to adjust the radial position of the support component.

[0006] In some embodiments of this application, the centering component is hollow, the centering component is sleeved outside the support component, and the centering component and the support component are connected with an interference fit.

[0007] In some embodiments of this application, the stretching assembly includes a positioning component. The second profile surface is arranged on the outer wall of the positioning component, and the first profile surface is arranged on the inner wall of the centering component. The end of the positioning component is inserted into the centering component so that the second profile surface abuts against the first profile surface.

[0008] In some embodiments of this application, the extending directions of the first profile surface and the second profile surface are inclined to the axis of the fastener disassembly and assembly device, so that the inner diameter of the centering component gradually increases at one end facing the positioning component, and the outer diameter of the positioning component gradually decreases at one end facing the centering component.

[0009] In some embodiments of the present application, the stretching assembly further includes a hollow movable member, an inner wall of the movable member is provided with an internal thread, the internal thread is used for forming a threaded connection with the stud, the movable member is inserted into the positioning member, and the movable member slides away from the positioning member and applies a traction force to the stud.

[0010] In some embodiments of the present application, a liquid injection space is defined by an inner wall of the positioning member and an outer wall of the movable member, the liquid injection space is used for accommodating a control liquid, and when the amount of the control liquid in the liquid injection space increases, the movable member moves away from the positioning member.

[0011] In some embodiments of the present application, the inner wall of the positioning member includes a first sealing connection portion, a first accommodating portion, and a second sealing connection portion, and the outer wall of the movable member includes a third sealing connection portion, a second accommodating portion, and a fourth sealing connection portion. The first sealing connection portion, the second sealing connection portion, the third sealing connection portion, and the fourth sealing connection portion all extend along the axial direction of the fastener disassembling and assembling device, the first accommodating portion and the second accommodating portion both extend along the radial direction of the fastener disassembling and assembling device, the first sealing connection portion and the third sealing connection portion are in sliding connection, the second sealing connection portion and the fourth sealing connection portion are in sliding connection, and the first accommodating portion, the second sealing connection portion, the second accommodating portion, and the third sealing connection portion define the liquid injection space.

[0012] In some embodiments of the present application, a first sealing member is provided between the first sealing connection portion and the third sealing connection portion, and a second sealing member is provided between the second sealing connection portion and the fourth sealing connection portion.

[0013] In some embodiments of the present application, the stretching assembly further includes a driving member, the movable member is provided with a liquid injection channel communicating with the liquid injection space, the driving member is connected to the liquid injection channel, and injects the control liquid into the liquid injection space through the liquid injection channel to drive the movement of the movable member.

[0014] In some embodiments of the present application, the fastener disassembling and assembling device further includes a lever, a hollow portion is provided on a side wall of the supporting member, the hollow portion communicates with an internal space of the supporting member, and the lever is used for passing through the hollow portion and inserting into an installation hole of the nut, and driving the nut to rotate under the action of a force.

[0015] The embodiments of the present application have at least the following beneficial effects: In the present application, the supporting member is sleeved on the outside of the nut and abuts against the lower connecting rod cover, providing unilateral support for the stretching assembly of the connecting stud, facilitating the stretching assembly to apply traction force to the stud, and being conducive to the disassembly and assembly of the nut; the centering member and the stretching assembly connected to the supporting member form a profile fit, thereby adjusting the radial position of the supporting member, creating a gap between the supporting member and the nut, avoiding the frictional resistance caused by the contact between the supporting member and the nut, and improving the accuracy and smoothness of the nut disassembly and assembly.

[0016] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is a schematic diagram of the fastener disassembly and assembly device of the present application installed on the lower connecting rod cover;

[0019] Figure 2 is a cross-sectional view of the fastener disassembly and assembly device of the present application;

[0020] Figure 3 is a side view of the fastener disassembly and assembly device of the present application;

[0021] Figure 4 is a cross-sectional view of the positioning member of the stretching assembly in the fastener disassembly and assembly device of the present application;

[0022] Figure 5 is a cross-sectional view of the movable member of the stretching assembly in the fastener disassembly and assembly device of the present application.

[0023] REFERENCE NUMERALS:

[0024] nut 101; stud 102; lower connecting rod cover 103; upper connecting rod cover 104;

[0025] centering member 201; supporting member 202;

[0026] second profile 301; positioning member 302; movable member 303; internal thread 304;

[0027] liquid injection space 401; first sealing connection part 402; first accommodating part 403; second sealing connection part 404; third sealing connection part 405; second accommodating part 406; fourth sealing connection part 407; first sealing member 408; second sealing member 409; driving member 410; liquid injection channel 411;

[0028] lever 501. Detailed implementation manners

[0029] This part will combine with Figures 1 to 5 Describe the embodiments of the present application in detail. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with 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 application and should not be construed as a limitation to the present application.

[0030] In the description of the present application, it should be understood that if terms such as "center", "middle part", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application 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 application. The features defined with "first" and "second" are used to distinguish the feature names and do not have special meanings. In addition, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0031] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0032] The fasteners for disassembly and assembly provided in the embodiments of the present application include a stud 102 and a nut 101. The stud 102 and the nut 101 are used to connect the connecting rod upper cover 104 and the connecting rod lower cover 103. The stud 102 passes through the connecting rod lower cover 103 and is threadedly connected to the connecting rod upper cover 104, and the nut 101 is connected to the outside of the connecting rod lower cover 103.

[0033] As Figure 1As shown in the figure, an embodiment of the present application provides a fastener disassembly and assembly device, which includes a support assembly and a stretching assembly. The support assembly abuts against the lower connecting rod cover 103, is used to support the stretching assembly, and the support assembly is sleeved outside the nut 101. The stretching assembly is connected to the stud 102 and provides a traction force in the direction away from the upper connecting rod cover 104 to the stud 102, which facilitates the installation of the nut 101 in place with a certain pre-tightening force and also facilitates the disassembly of the nut 101.

[0034] At the same time, the support assembly is likely to come into contact with one side of the nut 101 due to its own gravity. When the nut 101 rotates, a frictional resistance will be formed between the support assembly and the nut 101. The frictional resistance will hinder the disassembly and assembly of the nut 101. In addition, when the operator installs the nut 101, the frictional resistance will make the operator mistakenly think that the nut 101 has reached the required pre-tightening force, which is likely to cause the phenomenon that the nut 101 is not installed in place.

[0035] Therefore, a positioning effect is formed between the stretching assembly and the support assembly to adjust the radial position of the support assembly to avoid contact between the support assembly and the nut 101, thereby avoiding the formation of frictional resistance between the support assembly and the nut 101 and ensuring the installation accuracy of the nut 101.

[0036] As Figure 2 and Figure 3 shown, in some examples, the support assembly includes a centering member 201 and a support member 202. The support member 202 is hollow and is generally formed into an annular structure. The support member 202 is sleeved outside the nut 101, and the end of the support member 202 abuts against the lower connecting rod cover 103.

[0037] Among them, the inner diameter dimension of the support member 202 is larger than the outer diameter dimension of the nut 101. On the one hand, it is convenient for the support member 202 to be sleeved outside the nut 101; on the other hand, it is convenient for the positioning effect between the stretching assembly and the support assembly to adjust the radial position of the support member 202, so that a gap is generated between the support member 202 and the nut 101, thereby avoiding the formation of frictional resistance between the support member 202 and the nut 101.

[0038] Furthermore, the centering member 201 is hollow and is generally formed into an annular structure. The centering member 201 is connected to the support member 202. The stretching assembly and the support assembly are arranged side by side, and the centering member 201 abuts against the stretching assembly to form a profile fit. Since the stretching assembly is approximately coaxial with the stud 102 and the nut 101, the stretching assembly drives the centering member 201 to be approximately coaxial with the stud 102 and the nut 101 through the profile fit, and the centering member 201 then drives the support member 202 to adjust the radial position, so as to ensure that there is a gap between the support member 202 and the nut 101.

[0039] In some examples, the centering component 201 is sleeved on the outside of the supporting component 202, and the inner wall of the centering component 201 forms an interference fit with the outer wall of the supporting component 202 to prevent the centering component 201 and the supporting component 202 from moving relative to each other, thereby ensuring that the movement of the centering component 201 can drive the supporting component 202 to adjust its radial position by the same amplitude.

[0040] Specifically, the inner wall cross-section of the centering component 201 is circular, and the outer wall cross-section is also circular; the inner wall cross-section of the supporting component 202 is circular, and the outer wall cross-section is elliptical.

[0041] In some examples, the centering component 201 is provided with a first profile, and the stretching assembly is provided with a second profile 301 , and the first profile fits against the second profile 301 to achieve profile matching between the centering component 201 and the stretching assembly.

[0042] like Figure 4 As shown, the stretching assembly includes a positioning member 302, which is hollow and generally annular. A second profile 301 is provided on the outer wall of the positioning member 302, and a first profile is provided on the inner wall of the centering member 201. As the positioning member 302 gradually approaches and contacts the centering member 201, the end of the positioning member 302 is inserted into the interior space of the centering member 201, causing the first and second profiles 301 to interfere with each other.

[0043] In some examples, the extension direction of the first profile and the second profile 301 is inclined to the axial direction of the fastener disassembly and assembly device. It can be understood that the inclination angles of the first profile and the second profile 301 are approximately consistent, ensuring that the first profile and the second profile 301 can form surface contact, thereby achieving profile matching.

[0044] Specifically, the inner diameter of the centering component 201 gradually increases toward one end of the positioning component 302, while the outer diameter of the positioning component 302 gradually decreases toward one end of the centering component 201. As the positioning component 302 gradually approaches the centering component 201, it is convenient for the end of the positioning component 302 to enter the centering component 201 from a position with a larger opening size. After the end of the positioning component 302 enters the centering component 201, as the positioning component 302 continues to approach the centering component 201, the second profile 301 gradually approaches and collides with the first profile. Since the second profile 301 is set at an inclined angle with the first profile, the increasingly tight profile fit will standardize the radial position of the centering component 201, so that the centering component 201 drives the support component 202 to disengage from the nut 101.

[0045] like Figure 5As shown, in some examples, the stretching component further includes a movable part 303. The movable part 303 is hollow and is generally formed into an annular structure. Among them, the part of the stud 102 protruding from the nut 101 is installed inside the movable part 303. Specifically, an internal thread 304 is provided on the inner wall of the movable part 303, and the internal thread 304 forms a threaded connection with the external thread of the stud 102, so as to ensure that the movable part 303 is approximately coaxial with the stud 102 and the nut 101.

[0046] Furthermore, the movable part 303 is inserted into the inside of the positioning part 302, and the shape of the outer wall of the movable part 303 corresponds to the shape of the inner wall of the positioning part 302, ensuring that the positioning part 302 is also approximately coaxial with the stud 102 and the nut 101. Therefore, the positioning part 302 can drive the centering part 201 together with the supporting part 202 to be coaxial with the stud 102 and the nut 101 through surface fitting, avoiding contact between the supporting part 202 and the nut 101.

[0047] In addition, when the positioning part 302 and the centering part 201 form a tight surface fit, the positioning part 302, the centering part 201 and the supporting part 202 form an integral body supported on the connecting rod lower cover 103. At this time, the axial position of the integral body formed by the positioning part 302, the centering part 201 and the supporting part 202 is stable. The movable part 303 is slidably connected to the positioning part 302. When the movable part 303 gradually moves away from the positioning part 302, the movable part 303 drives the stud 102 to move away from the connecting rod lower cover 103 through traction, facilitating the locking and disassembly of the nut 101.

[0048] As Figure 2 shown, in some examples, a liquid injection space 401 is formed between the inner wall of the positioning part 302 and the outer wall of the movable part 303. When the movable part 303 is installed on the stud 102, the control liquid in the liquid injection space 401 decreases, causing the movable part 303 to approach the positioning part 302; when the control liquid in the liquid injection space 401 increases, the pressure of the control liquid drives the movable part 303 to gradually move away from the positioning part 302, realizing the stretching of the stud 102.

[0049] As Figure 4 and Figure 5As shown, in some examples, the inner wall of the positioning member 302 includes a first sealing connection portion 402, a first accommodating portion 403, and a second sealing connection portion 404 that are connected to each other. The first accommodating portion 403 is located between the first sealing connection portion 402 and the second sealing connection portion 404. The first sealing connection portion 402 and the second sealing connection portion 404 extend along the axial direction of the fastener disassembly and assembly device, and the first accommodating portion 403 extends along the radial direction of the fastener disassembly and assembly device. Specifically, the first sealing connection portion 402 and the second sealing connection portion 404 are parallel to the axial direction, and the first accommodating portion 403 is parallel to the radial direction.

[0050] At the same time, the inner wall of the movable member 303 includes a third sealing connection portion 405, a second accommodating portion 406, and a fourth sealing connection portion 407 that are connected to each other. The second accommodating portion 406 is located between the third sealing connection portion 405 and the fourth sealing connection portion 407. The third sealing connection portion 405 and the fourth sealing connection portion 407 extend along the axial direction of the fastener disassembly and assembly device, and the second accommodating portion 406 extends along the radial direction of the fastener disassembly and assembly device. Specifically, the third sealing connection portion 405 and the fourth sealing connection portion 407 are parallel to the axial direction, and the second accommodating portion 406 is parallel to the radial direction.

[0051] When the movable member 303 is inserted into the positioning member 302, the first sealing connection portion 402 fits with the third sealing connection portion 405 and forms a sliding connection; the second sealing connection portion 404 fits with the fourth sealing connection portion 407 and forms a sliding connection. It can be understood that as the movable member 303 slides within the positioning member 302, the distance between the first accommodating portion 403 and the second accommodating portion 406 changes.

[0052] Specifically, the first accommodating portion 403, the second sealing connection portion 404, the second accommodating portion 406, and the third sealing connection portion 405 enclose a relatively closed liquid injection space 401. When the distance between the first accommodating portion 403 and the second accommodating portion 406 changes, the volume of the liquid injection space 401 also changes.

[0053] In some examples, to ensure the tightness of the liquid injection space 401, a first sealing member 408 is provided between the first sealing connection portion 402 and the third sealing connection portion 405. Specifically, the first sealing connection portion 402 is provided with an installation groove, and the first sealing member 408 is embedded in the installation groove. The first sealing member 408 seals the gap between the first sealing connection portion 402 and the third sealing connection portion 405. Similarly, a second sealing member 409 is provided between the second sealing connection portion 404 and the fourth sealing connection portion 407, and the fourth sealing member is also provided with an installation groove, and the second sealing member 409 is embedded in the installation groove.

[0054] In some examples, the stretching component further includes a driving member 410, which is used to introduce hydraulic fluid into the liquid injection space 401, so as to drive the movable member 303 to move.

[0055] Wherein, the driving member 410 includes a tubing. The movable member 303 is provided with a liquid injection channel 411, and the liquid injection channel 411 communicates with the liquid injection space 401. The tubing is connected to the liquid injection channel 411 and introduces the hydraulic fluid into the liquid injection space 401 through the liquid injection channel 411.

[0056] In some examples, the fastener disassembly and assembly device further includes a lever 501 with a certain length. The lever 501 passes through the support member 202 and is connected to the mounting hole of the nut 101, thereby lengthening the torque arm of the nut 101. The rotational force applied by the staff to the lever 501 is transmitted to the nut 101, causing the nut 101 to rotate, thereby completing the disassembly and assembly of the nut 101.

[0057] Wherein, the side wall of the support member 202 is provided with a hollowed-out portion, and the hollowed-out portion communicates with the internal space of the support member 202. The lever 501 passes through the hollowed-out portion and is inserted into the mounting hole of the nut 101. To ensure that the lever 501 has enough movement stroke, the hollowed-out portion has a certain length.

[0058] In the actual implementation process, the support member 202 is sleeved outside the nut 101. The movable member 303 of the stretching component is threadedly connected to the stud 102 until the movable member 303 forms a tight surface fit with the centering member 201, making the support member 202 approximately coaxial with the nut 101 and the stud 102, and preventing the support member 202 from contacting the nut 101; injecting oil into the liquid injection space 401 through the tubing, so that the movable member 303 stretches the stud 102, facilitating the disassembly and assembly of the nut 101 and the stud 102; the lever 501 passes through the hollowed-out portion and is connected to the mounting hole of the nut 101, and the lever 501 drives the nut 101 to rotate together, thereby completing the disassembly and assembly of the nut 101.

[0059] In the description of this specification, if there are descriptions of reference terms such as "one embodiment", "some examples", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", it 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 application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0060] The embodiments of the present application have been described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present application within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A fastener disassembly and assembly device, characterized in that, Comprising: A support assembly, the support assembly includes a centering member and a hollow support member, the support member is used to be sleeved outside the nut and abuts against the lower connecting rod cover, the centering member is connected to the support member, and the centering member is provided with a first profile surface; A stretching assembly, the stretching assembly is arranged in parallel with the support assembly, the stretching assembly is used to connect the stud and apply a traction force to the stud, the stretching assembly is provided with a second profile surface, and the stretching assembly and the support assembly form a profile surface fit through the abutment of the first profile surface and the second profile surface to adjust the radial position of the support member.

2. The fastener disassembly and assembly device according to claim 1, characterized in that, The centering member is hollow, the centering member is sleeved outside the support member, and the centering member and the support member are connected with an interference fit.

3. The fastener disassembly and assembly device according to claim 1, wherein The stretching assembly includes a positioning member, the second profile surface is arranged on the outer wall of the positioning member, the first profile surface is arranged on the inner wall of the centering member, and the end of the positioning member is inserted into the centering member so that the second profile surface abuts against the first profile surface.

4. The fastener disassembly and assembly device according to claim 3, wherein, The extending directions of the first profile surface and the second profile surface are inclined to the axis of the fastener disassembly and assembly device, so that the inner diameter of one end of the centering member facing the positioning member gradually increases, and the outer diameter of one end of the positioning member facing the centering member gradually decreases.

5. The fastener disassembly and assembly device according to claim 3, wherein The stretching assembly further includes a hollow movable member, the inner wall of the movable member is provided with internal threads, the internal threads are used to form a threaded connection with the stud, the movable member is inserted into the inside of the positioning member, and the movable member slides away from the positioning member through the sliding connection with the positioning member and applies a traction force to the stud.

6. The fastener disassembly and assembly device according to claim 5, wherein A liquid injection space is formed between the inner wall of the positioning member and the outer wall of the movable member, the liquid injection space is used to accommodate control liquid, and when the control liquid in the liquid injection space increases, the movable member moves away from the positioning member.

7. The fastener disassembly and assembly device according to claim 6, characterized in that, The inner wall of the positioning member includes a first sealing connection portion, a first accommodating portion and a second sealing connection portion, the outer wall of the movable member includes a third sealing connection portion, a second accommodating portion and a fourth sealing connection portion, the first sealing connection portion, the second sealing connection portion, the third sealing connection portion and the fourth sealing connection portion all extend along the axis of the fastener disassembly and assembly device, the first accommodating portion and the second accommodating portion both extend along the radial direction of the fastener disassembly and assembly device, the first sealing connection portion and the third sealing connection portion are in sliding connection, the second sealing connection portion and the fourth sealing connection portion are in sliding connection, and the first accommodating portion, the second sealing connection portion, the second accommodating portion and the third sealing connection portion enclose the liquid injection space.

8. The fastener disassembly and assembly device according to claim 7, wherein, A first sealing member is arranged between the first sealing connection portion and the third sealing connection portion, and a second sealing member is arranged between the second sealing connection portion and the fourth sealing connection portion.

9. The fastener disassembly and assembly device according to claim 6, characterized in that, The stretching assembly further includes a driving member, the movable member is provided with a liquid injection channel communicating with the liquid injection space, the driving member is connected to the liquid injection channel and injects control liquid into the liquid injection space through the liquid injection channel to drive the movable member to move.

10. The fastener disassembly and assembly device according to claim 1, characterized in that, The fastener disassembly and assembly device further includes a lever. A hollowed-out portion is formed in the side wall of the support member, and the hollowed-out portion communicates with the internal space of the support member. The lever is used to pass through the hollowed-out portion and insert into the mounting hole of the nut, and drive the nut to rotate under the action of force.

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