Method for locking bolt to workpiece in narrow space

Abstract

The invention discloses a method for locking a bolt on a workpiece in a narrow space, and the method comprises the steps: designing an elastic nut assembly, the shape of the elastic nut assembly is matched with the shape of a first through hole, after the elastic nut assembly enters the first through hole, the elastic nut assembly is rotationally limited through the first through hole, and the elastic nut assembly is locked on the workpiece through the first through hole; the elastic nut assembly can only move in the axis direction of the first through hole. In the working process, the elastic nut assembly is plugged into the first through hole from one end of the first through hole, after the elastic nut assembly enters the first through hole, the elastic nut assembly is supported in the first through hole through the elastic effect of the elastic nut assembly, then the elastic nut assembly is pushed by a tool to move in the first through hole in the axial direction, and the elastic nut assembly is clamped in the first through hole. The elastic nut assembly is arranged in the second through hole, the elastic nut assembly is moved to the end opening of one end of the second through hole, then the bolt is inserted into the second through hole to enable the rod portion of the bolt to be located at the elastic nut assembly, torque is applied to the bolt, and therefore the bolt is locked on the workpiece through the elastic nut assembly.

Description

Technical Field

[0001] The invention relates to a method for locking a bolt, in particular to a method for locking a bolt onto a workpiece in a narrow space, and belongs to the technical field of bolt fastening. Background Art

[0002] Bolts and nuts are the most common and important components of fasteners. They are usually used together to connect and fix various mechanical parts and equipment. The threaded pair between the bolt and the nut cooperates with each other to form a friction force. The self-locking characteristics of the thread can prevent the bolt from loosening under the action of vibration or vibration. This friction force can resist external vibration, and during the vibration process, the threaded pair will increase the friction resistance due to relative sliding, making the bolt fixing state more secure.

[0003] Under normal working conditions, using tools such as wrenches or torque wrenches, according to the operating requirements, the bolts or nuts can be tightened by applying appropriate torque. However, in some narrow spaces, it is difficult to tighten the bolts due to poor operation.

[0004] like Figure 1 As shown, a through hole 1 2 and a through hole 2 3 are formed on the workpiece 1, the central axes of the through hole 1 2 and the through hole 2 3 are cross-distributed, and one end of the through hole 2 3 is connected to the through hole 1 2. Figure 2 As shown, for work needs, the bolt rod 411 of the bolt 4 needs to be inserted into the through hole 1 through the through hole 2, and then the nut 5 is locked on the bolt rod 411 located in the through hole 1 in the through hole 2, so as to lock the bolt 4. It can be seen that in order to lock the bolt 4, the nut 5 must be fixed and a torque must be applied to the bolt 4, or the bolt 4 must be fixed and a torque must be applied to the nut 5. However, since the space of the through hole 1 is very narrow, the operator cannot insert his hand or a wrench into it to fix the nut 5 or apply a torque to the nut 5. Therefore, it is difficult to lock the bolt in this installation condition, thereby increasing the work intensity and reducing the work efficiency.

[0005] After searching, no patent documents identical or similar to the present application have been found.

[0006] In summary, how to design a method for locking bolts to workpieces in a narrow space so that the bolts can be locked conveniently and quickly in a narrow installation space, reduce work intensity, and improve work efficiency is a technical problem that needs to be solved urgently. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a method for locking a bolt to a workpiece in a narrow space in response to the defects existing in the prior art. The method can conveniently and quickly lock the bolt in a narrow installation space, reduce work intensity and improve work efficiency.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is: a method for locking a bolt onto a workpiece in a narrow space, wherein a through hole 1 and a through hole 2 are opened on the workpiece, the central axes of the through hole 1 and the through hole 2 are cross-distributed, and one end of the through hole 2 is connected to the through hole 1, and the method is to design an elastic nut assembly, the shape of the elastic nut assembly matches the shape of the through hole 1, and when the elastic nut assembly enters the through hole 1, the elastic nut assembly is rotationally limited by the through hole pair, so that the elastic nut assembly can only move along the axial direction of the through hole 1; During operation, the elastic nut assembly is inserted into the through hole one from one end of the through hole one. After the elastic nut assembly enters the through hole one, the elastic effect of the elastic nut assembly is utilized to support the elastic nut assembly in the through hole one. Then, a tool is utilized to push the elastic nut assembly to move axially in the through hole one to one end port of the through hole two. Then, a bolt is inserted from the through hole two so that the bolt rod is located at the elastic nut assembly. Then, a torque is applied to the bolt, thereby locking the bolt on the workpiece through the elastic nut assembly.

[0009] Preferably, the elastic nut assembly comprises a left nut portion and a right elastic portion connected to the left nut portion; When the elastic nut assembly is placed in through hole one, the outer circumference of the left nut part contacts the inner circumference of through hole one, and the right elastic part is elastically deformed by the extrusion of the inner circumference of through hole one. Under the action of the restoring force of the elastic force, the outer circumference of the right elastic part is in close elastic contact with the inner circumference of through hole one, thereby supporting the elastic nut assembly in through hole one.

[0010] Preferably, the right elastic part includes a spring body and a spring connector provided on the spring body, and the spring body is connected to the left nut part through the spring connector; When the elastic nut assembly is placed in the through hole one, the outer side surface of the spring body is elastically and tightly contacted with the inner peripheral surface of the through hole one, so that the entire elastic nut assembly is supported in the through hole one.

[0011] Preferably, a spring body cavity is formed on the spring body, a positioning disc is arranged in the spring body cavity, and the positioning disc is connected to the spring body; a positioning through hole is also arranged on the workpiece at a position relative to the second through hole, the positioning through hole is connected to the first through hole, and the shape of the positioning disc on the spring body matches the shape of the positioning through hole; When the elastic nut assembly moves down in through hole one, when the positioning disc on the spring body is inserted into the positioning through hole, it means that the elastic nut assembly has moved down into place. When the elastic nut assembly has moved down into place, the bolt is inserted into through hole two so that the bolt rod is located at the elastic nut assembly.

[0012] Preferably, the left nut part includes a hollow nut seat and a nut sleeve connected to one side of the nut seat, the nut seat includes a hollow seat body, a top plate arranged on one side of the seat body and a bottom plate arranged on one side of the seat body, the other side surface of the seat body is the outer peripheral surface of the left nut part, the outer side surface shape of the seat body matches the inner peripheral surface shape of the through hole one, so that a rotation limiting structure for the left nut part is formed between the seat body and the through hole one; the spring connecting piece of the right elastic part includes an upper card arranged at the top of the spring body and a lower card arranged at the bottom of the spring body; When assembling the elastic nut assembly, the left nut part is clamped between the upper card and the lower card, so that the top plate of the left nut part contacts the upper card and the bottom plate of the left nut part contacts the lower card, thereby connecting the left nut part and the right elastic part into one.

[0013] Preferably, the nut sleeve includes a sleeve body and a sleeve body flange arranged on one end of the sleeve body, a thread is arranged on the inner circumferential surface of the sleeve body, the sleeve body cavity is connected with the seat body cavity, and the sleeve body cavity and the seat body cavity are located at the same central axis; when working, the bolt rod of the bolt extends from the sleeve body cavity into the seat body cavity.

[0014] Preferably, an inner conical surface is also provided on the inner circumferential surface of the sleeve body and located near one side of the sleeve body flange; During the extension of the bolt shank, the end of the bolt shank is in contact with the inner conical surface to automatically adjust the position of the elastic nut assembly so that the central axis of the bolt shank coincides with the central axis of the sleeve.

[0015] Preferably, the seat body, the top plate and the bottom plate are enclosed on one side of the seat body to form a sleeve installation space, and the outer peripheral surface shape of the sleeve flange is set to be square, which matches the shape of the sleeve installation space; after the sleeve flange is placed in the sleeve installation space, the sleeve flange is matched with the sleeve installation space to form a second rotation limiting structure for the nut sleeve; During operation, the rotation of the nut sleeve is restricted by the rotation limiting structure 2 formed between the sleeve flange and the sleeve installation space, and the rotation limiting structure 1 for the left nut part is formed between the seat body and the through hole 1, thereby finally realizing the rotation limiting function of the elastic nut assembly of the through hole 1.

[0016] The beneficial effect of the present invention is that: the present invention designs an elastic nut assembly, utilizes its elastic support on the inner circumference of through hole one, and then utilizes through hole one to limit the rotation of the elastic nut assembly, so that the elastic nut assembly can only move axially in through hole one, but cannot rotate. When working, the elastic nut assembly is moved to the inserted bolt rod, and then the rotating bolt and the elastic nut assembly that is limited by rotation are used to lock, so that the bolt can be locked conveniently and quickly in a narrow installation space, reducing the work intensity and improving the work efficiency. By arranging an inner cone surface on the inner circumference of the sleeve body, the end of the bolt rod part is contacted and matched with the inner cone surface, and the position of the elastic nut assembly can be automatically adjusted, so that the elastic nut assembly moves a few positions along the axial direction, and performs micro-adjustment, so that the central axis of the bolt rod part coincides with the central axis of the sleeve body, ensuring that the bolt rod part can smoothly enter the inner cavity of the sleeve body and be connected with the thread, thereby ensuring the smooth progress of the work. By arranging a positioning disc to cooperate with the positioning through hole to form a positioning structure, the work intensity can be further reduced and the work efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the axial cross-sectional structure of a workpiece in the prior art; Figure 2 It is a schematic diagram of the axial cross-sectional structure after the bolt is locked on the workpiece in the prior art; Figure 3 The schematic diagram of the principle structure of locking the bolt to the workpiece by using the elastic nut assembly in the embodiment of the present invention is as follows: Figure 1 ; Figure 4 The schematic diagram of the principle structure of locking the bolt to the workpiece by using the elastic nut assembly in the embodiment of the present invention is as follows: Figure 2 ; Figure 5 The schematic diagram of the principle structure of locking the bolt to the workpiece by using the elastic nut assembly in the embodiment of the present invention is as follows: Figure 3 ; Figure 6 The schematic diagram of the principle structure of locking the bolt to the workpiece by using the elastic nut assembly in the embodiment of the present invention is as follows: Figure 4 ; Figure 7 The schematic diagram of the principle structure of locking the bolt to the workpiece by using the elastic nut assembly in the embodiment of the present invention is as follows: Figure 5 ; Figure 8 It is a schematic diagram of the three-dimensional structure of the elastic nut assembly in an embodiment of the present invention; Fig. 9 This is a schematic diagram of the three-dimensional structure of the right elastic part in an embodiment of the present invention; Fig.10 This is a schematic diagram of the front view of the right elastic part in an embodiment of the present invention; Fig.11 It is a schematic diagram of the axial cross-sectional structure of the left nut part in an embodiment of the present invention; Fig.12 It is a schematic diagram of the three-dimensional structure of the left nut part in an embodiment of the present invention; Fig.13 It is a schematic diagram of the axial cross-sectional structure of the nut sleeve of the left nut part in an embodiment of the present invention; Fig.14 It is a schematic diagram of the exploded three-dimensional structure of the left nut part in an embodiment of the present invention; In the figure: 1. workpiece, 2. through hole 1, 3. through hole 2, 4. bolt, 411. bolt rod, 5. nut, 6. elastic nut assembly, 7. left nut part, 8. right elastic part, 811. spring body, 8111. spring body cavity, 812. upper card, 813. lower card, 9. nut seat, 911. seat body, 912. top plate, 913. bottom plate, 914. seat body inner cavity, 10. nut sleeve, 101. sleeve body, 102. sleeve body flange, 103. sleeve body cavity, 11. thread, 12. inner cone, 13. stop rod 1, 14. stop rod 2, 15. stop rod mounting hole 1, 16. sleeve body mounting space, 17. positioning disc, 18. connecting plate, 19. positioning through hole. DETAILED DESCRIPTION

[0018] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] Example: Figures 3 to 7As shown, a method for locking a bolt to a workpiece in a narrow space is designed, wherein an elastic nut assembly 6 is designed, and the shape of the elastic nut assembly 6 matches the shape of a through hole 2; during operation, the elastic nut assembly 6 is inserted into the through hole 2 from one end of the through hole 2, and when the elastic nut assembly 6 enters the through hole 2, due to the elastic effect of the elastic nut assembly 6, the elastic nut assembly 6 is supported in the through hole 2 and does not fall out, and then a tool such as a rod is used to push the elastic nut assembly 6 to move axially in the through hole 2 to one end of the through hole 2, and then a bolt 4 is inserted from the through hole 23 so that the bolt rod 411 is located at the elastic nut assembly 6, and then a torque is applied to the bolt 4. At this time, since the shape of the elastic nut assembly 6 matches the shape of the through hole 2, the through hole 2 can be used to limit the rotation of the elastic nut assembly 6, so that when the bolt 4 rotates, the elastic nut assembly 6 is fixed and cannot rotate with the bolt 4, and finally the bolt 4 is locked on the workpiece through the elastic nut assembly 6. In this embodiment, an elastic nut assembly is designed, and its elastic support is used on the inner circumferential surface of through hole one, and through hole one is used to limit the rotation of the elastic nut assembly. In fact, the elastic nut assembly can only move axially in through hole one, but cannot rotate. During operation, the elastic nut assembly is moved to the inserted bolt rod, and then the rotating bolt and the rotationally limited elastic nut assembly are used to cooperate for locking, so that the bolt can be locked quickly and conveniently in a narrow installation space, reducing work intensity and improving work efficiency.

[0020] like Figure 8 As shown, the elastic nut assembly 6 is columnar, including a left nut portion 7 and a right elastic portion 8 connected to the left nut portion 7. The outer circumferential surface shape of the columnar elastic nut assembly 6 matches the inner circumferential surface shape of the through hole 2. In the present embodiment, the inner circumferential surface of the through hole 2 is circular, therefore, the left nut portion 7 and the right elastic portion 8 are both semicircular. When the inner circumferential surface shape of the through hole 2 is square or other shapes, correspondingly, the outer circumferential surface shape of the elastic nut assembly 6 is also set to be square or other shapes. When the elastic nut assembly 6 is placed in the through hole 2, the outer circumference of the right elastic part 8 is squeezed by the inner circumference of the through hole 2 and elastically deformed. After the elastic nut assembly 6 is placed in the through hole 2, the outer circumference of the left nut part 7 contacts the inner circumference of the through hole 2, and the right elastic part 8, under the action of the restoring force of the elastic force, makes the outer circumference of the right elastic part 8 tightly and elastically contact the inner circumference of the through hole 2, thereby supporting the elastic nut assembly 6 on the inner circumference of the through hole 2 without falling out.

[0021] like Fig. 9 and Fig.10As shown in FIG. 1 , the right elastic part 8 includes a spring body 811 and a spring connector disposed on the spring body, and the spring body 811 is connected to the left nut part 7 through the spring connector. In this embodiment, the spring connector is an upper card 812 disposed at the top of the spring body 811 and a lower card 813 disposed at the bottom of the spring body 811. When the left nut part 7 is connected, Figure 8 As shown, the left nut part 7 is engaged between the upper card 812 and the lower card 813, so that the left nut part 7 and the right elastic part 8 are connected as a whole. The spring body and the spring connector are connected as a whole through the above-mentioned engaging structure, which simplifies the assembly structure. The outer side surface of the spring body 811 is the outer peripheral surface of the right elastic part 8. The shape of the outer side surface of the spring body 811 matches the shape of the inner peripheral surface of the through hole 1 2. Since in this embodiment, the inner peripheral surface of the through hole 1 2 is circular, the outer side surface of the spring body 811 is correspondingly set to an arc surface. Here, when the inner peripheral surface of the through hole 1 2 is square, the outer side surface of the spring body 811 can also be set to a square. In order to support the elastic nut assembly 6 on the inner circumference of the through hole 1-2 through the elastic deformation of the outer circumference of the right elastic part 8, the size of the spring body 811 is slightly larger than the size of the through hole 1-2. In this embodiment, the radius of the spring body 811 is slightly larger than the radius of the through hole 1-2, so that when the elastic nut assembly 6 is placed in the through hole 1-2, the spring body 811 can be squeezed and elastically deformed. When the elastic nut assembly 6 is placed in the through hole 1-2, under the action of the restoring force of the elastic force, the outer side of the spring body 811 elastically contacts the inner circumference of the through hole 1-2, supporting the entire elastic nut assembly 6 in the through hole 1-2 and preventing it from falling. In addition, along the axial direction, an elastic deformation gap L1 is left between the spring body 811 and the left nut part 7, so that when the outer side of the spring body 811 is squeezed and deformed by the through hole 1-2, the elastic deformation gap L1 can ensure that the spring body 811 has sufficient deformation space when it undergoes elastic deformation.

[0022] like Fig.11 and Fig.12As shown, the left nut part 7 includes a hollow nut seat 9 and a nut sleeve 10 connected to one side of the nut seat 9, and the elastic deformation gap L1 is set at the position between the nut seat 9 and the spring body 811. The nut seat 9 includes a hollow seat body 911, a top plate 912 set on one side of the seat body 911, and a bottom plate 913 set on one side of the seat body 911. The other side of the seat body 911 is the outer side of the seat body 911, and the outer side of the seat body 911 is the outer peripheral surface of the left nut part 7. The shape of the outer side surface of the seat body 911 matches the shape of the inner peripheral surface of the through hole 1-2. Since in this embodiment, the inner peripheral surface of the through hole 1-2 is circular, the outer side surface of the seat body 911 is set to an arc surface accordingly. Here, when the inner peripheral surface of the through hole 1-2 is square, the outer side surface of the seat body 911 can also be set to a square. The size of the seat body 911 matches the size of the through hole 2, so that when the elastic nut assembly 6 is placed in the through hole 2, the outer side surface of the seat body 911 contacts the inner circumference of the through hole 2. In addition, the shape of the outer side surface of the seat body 911 matches the shape of the inner circumference of the through hole 2, so that a rotation limiting structure for the left nut part 7 is formed between the seat body 911 and the through hole 2, preventing the left nut part 7 from rotating when the bolt is tightened. When the left nut part is connected to the right elastic part, the left nut part 7 is engaged between the upper card 812 and the lower card 813, so that the top plate 912 of the left nut part 7 contacts the upper card 812, and the bottom plate 913 of the left nut part 7 contacts the lower card 813, thereby connecting the left nut part 7 and the right elastic part 8 into one body.

[0023] like Fig.11 and Fig.13As shown, the nut sleeve 10 includes a sleeve body 101 and a sleeve body flange 102 arranged on one end of the sleeve body 101, the sleeve body 101 and the sleeve body flange 102 are an integral structure, a thread 11 is arranged on the inner circumferential surface of the sleeve body 101, the sleeve body cavity 103 of the sleeve body 101 is connected with the seat body cavity 914 of the seat body 911, and the sleeve body cavity 103 and the seat body cavity 914 are located at the same central axis; when working, the bolt rod of the bolt extends from the sleeve body cavity 103 into the seat body cavity 914. An inner conical surface 12 is also provided on the inner circumferential surface of the sleeve 101 and on the side close to the sleeve flange 102. When the bolt rod 411 is inserted and the central axis of the bolt rod 411 has some deviation from the central axis of the sleeve 101, during the process of the bolt rod 411 being inserted, the end of the bolt rod 411 is in contact with the inner conical surface 12 to automatically adjust the position of the elastic nut assembly, so that the elastic nut assembly moves axially to some position and performs fine adjustment so that the central axis of the bolt rod 411 coincides with the central axis of the sleeve 101, thereby ensuring that the bolt rod 411 can smoothly enter the inner cavity of the sleeve 101 and cooperate with the thread 11 for connection, thereby ensuring the smooth progress of the work.

[0024] like Fig.12 and Fig.13 As shown, in order to facilitate the connection between the nut seat 9 and the nut sleeve 10, the applicant has designed a simple connection method, that is, a stopper rod 13 and a stopper rod 14 are respectively provided on the top plate 912 and the bottom plate 913 of the nut seat 9. When connecting, the nut sleeve 10 is first placed on one side of the nut seat 9, and then the stopper rod 13 and the stopper rod 14 are respectively connected to the top plate 912 and the bottom plate 913 of the nut seat 9, so that one side of the sleeve flange 102 of the nut sleeve 10 is in contact with the seat body 911 of the nut seat 9, and the stopper rod 13 and the stopper rod 14 are in contact with the other side of the sleeve flange 102 of the nut sleeve 10. One function of the two stopper rods is to connect the nut sleeve, and the other function is that during the working process, the bolt will generate an axial movement force on the nut sleeve, and the stopper rod 13 and the stopper rod 14 are used to block the axial movement direction of the nut sleeve, thereby avoiding the problem of axial movement of the nut sleeve and ensuring the normal operation. Here, in order to simplify the connection structure between the baffle rod and the nut seat, the present embodiment has a baffle rod mounting hole 15 and a baffle rod mounting hole 2 (not shown in the figure) respectively opened on the top plate 912 and the bottom plate 913. When connecting, first use elastic metal sheets (such as iron sheets, steel sheets, etc.) to roll into baffle rod 13 and baffle rod 2 14, and then insert one end of the rolled baffle rod 13 and one end of the baffle rod 2 14 into the baffle rod mounting hole 15 and the baffle rod mounting hole 2 respectively. In this way, the elastic restoring force of the rolled elastic metal sheet is utilized to make one end of the baffle rod 13 and one end of the baffle rod 2 14 expand and clamp in the baffle rod mounting hole 15 and the baffle rod mounting hole 2, which greatly simplifies the connection structure.

[0025] like Fig.14 As shown, the seat body 911, the top plate 912 and the bottom plate 913 enclose a sleeve installation space 16 on one side of the seat body 911, and the outer peripheral surface shape of the sleeve flange 102 matches the shape of the sleeve installation space 16. When connected, after the sleeve flange 102 is placed in the sleeve installation space 16, the sleeve flange 102 cooperates with the sleeve installation space 16 to form a second rotation limiting structure for the nut sleeve. The outer peripheral surface shape of the sleeve flange 102 can be set to a polygon. In this embodiment, the outer peripheral surface shape of the sleeve flange 102 is set to a square, so the sleeve installation space 16 is also set to a square. This setting is mainly to prevent the nut sleeve 10 from rotating in the circumferential direction during work to facilitate the tightening of the bolt. During operation, the rotation of the nut sleeve is restricted by the rotation limiting structure 2 formed between the sleeve flange 102 and the sleeve installation space 16, and the rotation limiting structure 1 for the left nut part is formed between the seat body and the through hole 1, thereby finally achieving the rotation limiting function of the through hole 1 2 on the elastic nut assembly 6.

[0026] like Figure 8 and Fig. 9 As shown, a spring body cavity 8111 is formed on the spring body 811, and a positioning disc 17 is arranged in the spring body cavity 8111. The positioning disc 17 is connected to the spring body 811 through a connecting piece 18, and the central axis of the positioning disc 17 coincides with the central axis of the inner cavity 103 of the nut sleeve 10. Here, the central axis of the positioning disc 17 may not coincide with the central axis of the inner cavity 103 of the nut sleeve 10, and it mainly plays a positioning role. Figures 3 to 5 As shown, a positioning through hole 19 is also provided on the workpiece 1 at a position relative to the through hole 2 3, the positioning through hole 19 is connected to the through hole 1 2 and the central axis of the positioning through hole 19 coincides with the central axis of the through hole 2 3. Here, the central axis of the positioning through hole 19 may not coincide with the central axis of the through hole 2 3, mainly for positioning. The shape of the positioning disc 17 on the spring body 811 matches the shape of the positioning through hole 19.

[0027] During operation, when the elastic nut assembly 6 is moved downward in the through hole 2, it is difficult to observe whether the elastic nut assembly 6 has been moved down into place due to the small space. Therefore, a positioning through hole 19 is set at the opposite position of the through hole 23. During the downward movement of the elastic nut assembly 6, when the positioning disc 17 on the spring body 811 is inserted into the positioning through hole 19, it represents that the elastic nut assembly 6 has been moved down into place. At this time, the sleeve body cavity 103, the seat body cavity 914 and the through hole 23 of the nut sleeve 10 are in the same central axis position. After the elastic nut assembly 6 is moved down into place, the bolt rod 411 of the bolt is inserted from the through hole 23 into the seat body cavity 914 and the sleeve body cavity 103 of the nut sleeve 10 for assembly. This can further reduce work intensity and improve work efficiency.

[0028] In summary, the present invention designs an elastic nut assembly, utilizes its elastic support on the inner circumference of through hole one, and then utilizes through hole one to limit the rotation of the elastic nut assembly, so that the elastic nut assembly can only move axially in through hole one, but cannot rotate. When working, the elastic nut assembly is moved to the inserted bolt rod, and then the rotating bolt and the elastic nut assembly that is limited by rotation are used to lock, so that the bolt can be locked conveniently and quickly in a narrow installation space, reducing the work intensity and improving the work efficiency. By providing an inner cone surface on the inner circumference of the sleeve body, the end of the bolt rod part is contacted and matched with the inner cone surface, and the position of the elastic nut assembly can be automatically adjusted, so that the elastic nut assembly moves a few positions along the axial direction, and a micro-adjustment is performed, so that the central axis of the bolt rod part coincides with the central axis of the sleeve body, ensuring that the bolt rod part can smoothly enter the inner cavity of the sleeve body and connect with the thread, thereby ensuring the smooth progress of the work. By providing a positioning disc and a positioning through hole to form a positioning structure, the work intensity can be further reduced and the work efficiency can be improved.

[0029] The "multiple" mentioned in the embodiments refers to the number of "two or more". The above embodiments are only used to illustrate the present invention, not to limit the present invention. Those skilled in the relevant technical field can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the protection scope of the present invention, and the protection scope of the present invention should be defined by the claims.

Claims

1. A method for locking a bolt onto a workpiece in a narrow space, wherein a through hole 1 and a through hole 2 are formed on the workpiece, the central axes of the through hole 1 and the through hole 2 are cross-distributed, and one end of the through hole 2 is connected to the through hole 1, characterized in that: The method is to design an elastic nut assembly, the shape of which matches the shape of the through hole one, and when the elastic nut assembly enters the through hole one, the elastic nut assembly is rotationally limited by the through hole one, so that the elastic nut assembly can only move along the axial direction of the through hole one; During operation, the elastic nut assembly is inserted into the through hole one from one end of the through hole one. After the elastic nut assembly enters the through hole one, the elastic effect of the elastic nut assembly is utilized to support the elastic nut assembly in the through hole one. Then, a tool is utilized to push the elastic nut assembly to move axially in the through hole one to one end port of the through hole two. Then, a bolt is inserted from the through hole two so that the bolt rod is located at the elastic nut assembly. Then, a torque is applied to the bolt, thereby locking the bolt on the workpiece through the elastic nut assembly.

2. The method according to claim 1, characterized in that: The elastic nut assembly comprises a left nut portion and a right elastic portion connected to the left nut portion; When the elastic nut assembly is placed in through hole one, the outer circumference of the left nut part contacts the inner circumference of through hole one, and the right elastic part is elastically deformed by the extrusion of the inner circumference of through hole one. Under the action of the restoring force of the elastic force, the outer circumference of the right elastic part is in close elastic contact with the inner circumference of through hole one, thereby supporting the elastic nut assembly in through hole one.

3. The method according to claim 2, characterized in that: The right elastic part includes a spring body and a spring connector provided on the spring body, and the spring body is connected to the left nut part through the spring connector; When the elastic nut assembly is placed in the through hole one, the outer side surface of the spring body is elastically and tightly contacted with the inner peripheral surface of the through hole one, so that the entire elastic nut assembly is supported in the through hole one.

4. The method according to claim 3, characterized in that: A spring body cavity is formed on the spring body, a positioning disc is arranged in the spring body cavity, and the positioning disc is connected to the spring body; a positioning through hole is also arranged on the workpiece at a position relative to the through hole 2, the positioning through hole is connected to the through hole 1, and the shape of the positioning disc on the spring body matches the shape of the positioning through hole; When the elastic nut assembly moves down in through hole one, when the positioning disc on the spring body is inserted into the positioning through hole, it means that the elastic nut assembly has moved down into place. When the elastic nut assembly has moved down into place, the bolt is inserted into through hole two so that the bolt rod is located at the elastic nut assembly.

5. The method according to claim 3 or 4, characterized in that: The left nut part includes a hollow nut seat and a nut sleeve connected to one side of the nut seat, the nut seat includes a hollow seat body, a top plate arranged on one side of the seat body and a bottom plate arranged on one side of the seat body, the other side of the seat body is the outer peripheral surface of the left nut part, the outer side surface shape of the seat body matches the inner peripheral surface shape of the through hole one, so that a rotation limiting structure for the left nut part is formed between the seat body and the through hole one; the spring connecting piece of the right elastic part includes an upper card arranged at the top of the spring body and a lower card arranged at the bottom of the spring body; When assembling the elastic nut assembly, the left nut part is clamped between the upper card and the lower card, so that the top plate of the left nut part contacts the upper card and the bottom plate of the left nut part contacts the lower card, thereby connecting the left nut part and the right elastic part into one.

6. The method according to claim 5, characterized in that: The nut sleeve includes a sleeve body and a sleeve body flange arranged on one end of the sleeve body, a thread is arranged on the inner circumferential surface of the sleeve body, the inner cavity of the sleeve body is connected with the inner cavity of the seat body, and the inner cavity of the sleeve body and the inner cavity of the seat body are located at the same central axis; when working, the bolt rod of the bolt extends from the inner cavity of the sleeve body into the inner cavity of the seat body.

7. The method according to claim 6, characterized in that: An inner conical surface is also provided on the inner circumferential surface of the sleeve body and located near one side of the sleeve body flange; During the extension of the bolt shank, the end of the bolt shank is in contact with the inner conical surface to automatically adjust the position of the elastic nut assembly so that the central axis of the bolt shank coincides with the central axis of the sleeve.

8. The method according to claim 6, characterized in that: The seat body, the top plate and the bottom plate are enclosed on one side of the seat body to form a sleeve installation space, and the outer peripheral surface shape of the sleeve flange is set to be square, which matches the shape of the sleeve installation space; after the sleeve flange is placed in the sleeve installation space, the sleeve flange and the sleeve installation space are used to cooperate to form a second rotation limiting structure for the nut sleeve; During operation, the rotation of the nut sleeve is restricted by the rotation limiting structure 2 formed between the sleeve flange and the sleeve installation space, and the rotation limiting structure 1 for the left nut part is formed between the seat body and the through hole 1, thereby finally realizing the rotation limiting function of the elastic nut assembly of the through hole 1.

Images