Elastic nut assembly for locking bolt to workpiece in narrow space

Abstract

The invention discloses an elastic nut assembly for locking a bolt to a workpiece in a narrow space, a first through hole is formed in the workpiece, the elastic nut assembly is columnar and comprises a left nut part and a right elastic part connected with the left nut part, and the left nut part and the right elastic part are both semicircular; after the elastic nut assembly is placed in the first through hole, the outer circumferential face of the left nut part makes contact with the inner circumferential face of the first through hole, and the outer circumferential face of the right elastic part makes tight contact with the inner circumferential face of the first through hole in an elastic mode. By designing the specific structure of the elastic nut assembly, the elastic nut assembly can be elastically supported in the first through hole and cannot fall off, and the elastic nut assembly can only move in the axial direction and cannot rotate in the first through hole, so that a bolt can be conveniently and rapidly locked in a narrow mounting space, the working intensity is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to a fastening component for a locking bolt, and particularly to an elastic nut assembly for locking a bolt onto a workpiece in a narrow space, belonging to the technical field of bolt fastening. Background Art

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

[0003] Under normal working conditions, tools such as a wrench or a torque wrench are used to apply appropriate torque to the bolt or nut according to the operation requirements for tightening. However, in some narrow spaces, due to difficult operation, it is very difficult to lock the bolt.

[0004] As Figure 1 shown, a through hole one 2 and a through hole two 3 are formed in the workpiece 1. The central axes of the through hole one 2 and the through hole two 3 are cross-distributed, and one end of the through hole two 3 is communicated with the through hole one 2. As Figure 2 shown, due to work requirements, the bolt rod portion 411 of the bolt 4 needs to pass through the through hole two 3 and extend into the through hole one 2, and then the nut 5 is locked onto the bolt rod portion 411 located in the through hole one 2 in the through hole one 2, so as to lock the bolt 4. It can be seen that to lock the bolt 4, it is necessary to fix the nut 5 and apply torque to the bolt 4 or fix the bolt 4 and apply torque to the nut 5. However, due to the very narrow space of the through hole one 2, the operator cannot reach in with his hand or a wrench, etc. to fix the nut 5 or apply torque to the nut 5. Therefore, in this installation condition, it is very difficult to lock the bolt, which increases the working intensity and reduces the working efficiency.

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

[0006] In summary, how to design an elastic nut assembly for locking a bolt onto a workpiece in a narrow space, so that it can lock the bolt conveniently and quickly in a narrow installation space, reduce the working intensity, and improve the working efficiency is an urgent technical problem to be solved. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide an elastic nut assembly for locking a bolt to a workpiece in a narrow space to address the defects in the prior art. It can lock the bolt conveniently and quickly in a narrow installation space, reducing the working intensity and improving the working efficiency.

[0008] To solve the above technical problem, the technical solution adopted by the present invention is as follows: An elastic nut assembly for locking a bolt to a workpiece in a narrow space. A through hole one is provided on the workpiece. The elastic nut assembly is columnar and includes a left nut portion and a right elastic portion connected to the left nut portion. Both the left nut portion and the right elastic portion are semi-circular. After the elastic nut assembly is placed into the through hole one, the outer peripheral surface of the left nut portion contacts the inner peripheral surface of the through hole one, and the outer peripheral surface of the right elastic portion elastically contacts and adheres to the inner peripheral surface of the through hole one.

[0009] Preferably, the right elastic portion includes a spring plate body, an upper card provided at the top of the spring plate body, and a lower card provided at the bottom of the spring plate body. The left nut portion is clamped between the upper card and the lower card, thereby connecting the left nut portion and the right elastic portion into one body.

[0010] Preferably, along the axial direction, an elastic deformation gap L1 is left between the spring plate body and the left nut portion.

[0011] Preferably, a spring plate body cavity is provided on the spring plate body, and a positioning circular plate is provided in the spring plate body cavity. The positioning circular plate is connected to the spring plate body. A positioning through hole is also provided at a position on the workpiece corresponding to the through hole two. The positioning through hole is communicated with the through hole one. The shape of the positioning circular plate on the spring plate body matches the shape of the positioning through hole, and the positioning circular plate is used to be inserted into the positioning through hole to form a positioning structure.

[0012] Preferably, the left nut portion 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 provided on one side of the seat body, and a bottom plate provided on one side of the seat body. The other side surface of the seat body is the outer peripheral surface of the left nut portion. The shape of the outer side surface of the seat body matches the shape of the inner peripheral surface of the through hole one, and the shape of the outer side surface of the seat body matching the shape of the inner peripheral surface of the through hole one also forms a rotational limiting structure one for the left nut portion between the seat body and the through hole one.

[0013] Preferably, the nut sleeve includes a sleeve body and a sleeve flange provided at one end of the sleeve body. The sleeve body and the sleeve flange are an integral structure. A thread is provided on the inner peripheral surface of the sleeve body. The sleeve inner cavity of the sleeve body is communicated with the seat inner cavity of the seat body and the sleeve inner cavity and the seat inner cavity are on the same central axis.

[0014] Preferably, a stop rod one and a stop rod two are respectively provided on the top plate and the bottom plate of the nut seat. One side of the flange of the nut sleeve contacts the seat body of the nut seat, and the first stop bar and the second stop bar contact the other side of the flange of the nut sleeve, thereby connecting the nut sleeve to one side of the nut seat.

[0015] Preferably, a first stop bar mounting hole and a second stop bar mounting hole are respectively formed in the top plate and the bottom plate. The first stop bar and the second stop bar are formed by rolling an elastic metal sheet. One end of the rolled first stop bar and one end of the second stop bar are respectively inserted into the first stop bar mounting hole and the second stop bar mounting hole, so that one end of the first stop bar and one end of the second stop bar are expanded and clamped in the first stop bar mounting hole and the second stop bar mounting hole.

[0016] Preferably, the seat body, the top plate and the bottom plate enclose a sleeve mounting space on one side of the seat body. The outer peripheral surface shape of the flange of the sleeve is set to be square, which is matched with the shape of the sleeve mounting space. After the flange of the sleeve is placed in the sleeve mounting space, a second rotational limiting structure for the nut sleeve is formed by the cooperation of the flange of the sleeve and the sleeve mounting space.

[0017] The beneficial effects of the present invention are as follows: By designing the specific structure of the elastic nut assembly, it can be elastically supported in the through hole one and will not fall off, and it can only move axially in the through hole one and cannot rotate, so that the bolt can be locked quickly and conveniently in a narrow installation space, reducing the working intensity and improving the working efficiency. By providing an inner conical surface on the inner peripheral surface of the sleeve and using the end of the bolt rod to contact and cooperate with the inner conical surface, the position of the elastic nut assembly can be automatically adjusted, so that the elastic nut assembly moves axially by some positions for fine adjustment, ensuring that the central axis of the bolt rod coincides with the central axis of the sleeve, and ensuring that the bolt rod can smoothly enter the inner cavity of the sleeve for threaded connection, thus ensuring the smooth progress of the work. By designing the stop bar, one function is to connect the nut sleeve, and the other function is that during the working process, the bolt will generate an axial moving force on the nut sleeve. The first stop bar and the second stop bar are used to block in the axial moving direction of the nut sleeve, thereby avoiding the problem of axial movement of the nut sleeve and ensuring the normal progress of the work. By providing a positioning structure formed by the cooperation of the positioning disc and the positioning through hole, the working intensity can be further reduced and the working efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic axial sectional structure view of a workpiece in the prior art; Figure 2 is a schematic axial sectional structure view after locking the bolt to the workpiece in the prior art; Figure 3 is a schematic principle structure view of locking the bolt to the workpiece by using the elastic nut assembly in the embodiment of the present invention Figure 1 ; Figure 4 In the embodiment of the present invention, it is a schematic structural diagram of the principle of locking a bolt to a workpiece by using an elastic nut assembly Figure 2 ; Figure 5 In the embodiment of the present invention, it is a schematic structural diagram of the principle of locking a bolt to a workpiece by using an elastic nut assembly Figure 3 ; Figure 6 In the embodiment of the present invention, it is a schematic structural diagram of the principle of locking a bolt to a workpiece by using an elastic nut assembly Figure 4 ; Figure 7 In the embodiment of the present invention, it is a schematic structural diagram of the principle of locking a bolt to a workpiece by using an elastic nut assembly Figure 5 ; Figure 8 It is a three-dimensional structural schematic diagram of the elastic nut assembly in the embodiment of the present invention; Figure 9 It is a three-dimensional structural schematic diagram of the right elastic part in the embodiment of the present invention; Figure 10 It is a front view structural schematic diagram of the right elastic part in the embodiment of the present invention; Figure 11 It is an axial sectional structural schematic diagram of the left nut part in the embodiment of the present invention; Figure 12 It is a three-dimensional structural schematic diagram of the left nut part in the embodiment of the present invention; Figure 13 It is an axial sectional structural schematic diagram of the nut sleeve of the left nut part in the embodiment of the present invention; Figure 14 It is an exploded three-dimensional structural schematic diagram of the left nut part in the embodiment of the present invention; In the figure: 1. Workpiece, 2. First through hole, 3. Second through hole, 4. Bolt, 411. Bolt rod part, 5. Nut, 6. Elastic nut assembly, 7. Left nut part, 8. Right elastic part, 811. Elastic sheet body, 8111. Cavity of elastic sheet body, 812. Upper card, 813. Lower card, 9. Nut seat, 911. Seat body, 912. Top plate, 913. Bottom plate, 914. Inner cavity of seat body, 10. Nut sleeve, 101. Sleeve body, 102. Sleeve flange, 103. Inner cavity of sleeve body, 11. Thread, 12. Inner conical surface, 13. First stop bar, 14. Second stop bar, 15. First stop bar mounting hole, 16. Sleeve body mounting space, 17. Positioning circular plate, 18. Connecting piece, 19. Positioning through hole. Detailed implementation manners

[0019] The technical solutions of the present invention will be further elaborated in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Embodiment: As Figures 3 to 7As shown in the figure, the present invention first discloses a method for locking a bolt to a workpiece in a narrow space. Specifically, an elastic nut assembly 6 is designed, and the shape of the elastic nut assembly 6 matches the shape of the first through hole 2. During operation, the elastic nut assembly 6 is inserted into the first through hole 2 from one end of the first through hole 2. After the elastic nut assembly 6 enters the first through hole 2, due to the elastic effect of the elastic nut assembly 6, the elastic nut assembly 6 is supported in the first through hole 2 and will not fall out. Then, a tool such as a rod is used to push the elastic nut assembly 6 to move axially in the first through hole 2 until it reaches one end port of the second through hole 3. Then, the bolt 4 is inserted into the second through hole 3 so that the bolt rod portion 411 is located at the elastic nut assembly 6. Next, 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 first through hole 2, the first through hole 2 can be used to limit the rotation of the elastic nut assembly 6. When the bolt 4 rotates, the elastic nut assembly 6 is fixed and cannot rotate with the bolt 4. Finally, the bolt 4 is locked to the workpiece through the elastic nut assembly 6. In this embodiment, by designing the elastic nut assembly, using its elastic support on the inner peripheral surface of the first through hole, and then using the first through hole to limit the rotation of the elastic nut assembly, in fact, the elastic nut assembly can only move axially in the first through hole and cannot rotate. During operation, the elastic nut assembly is moved to the position of the inserted bolt rod portion, and then the rotating bolt and the rotation-limited elastic nut assembly are used in cooperation for locking, so that the bolt can be locked conveniently and quickly in a narrow installation space, reducing the working intensity and improving the working efficiency.

[0021] As Figure 8 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 peripheral surface shape of the columnar elastic nut assembly 6 matches the inner peripheral surface shape of the first through hole 2. In this embodiment, the inner peripheral surface of the first through hole 2 is circular. Therefore, both the left nut portion 7 and the right elastic portion 8 are semi-circular. When the inner peripheral surface shape of the first through hole 2 is square or other shapes, correspondingly, the outer peripheral surface shape of the elastic nut assembly 6 is also set to square or other shapes. When the elastic nut assembly 6 is placed into the first through hole 2, the outer peripheral surface of the right elastic portion 8 is elastically deformed by the inner peripheral surface of the first through hole 2. After the elastic nut assembly 6 is placed into the first through hole 2, the outer peripheral surface of the left nut portion 7 contacts the inner peripheral surface of the first through hole 2, and under the action of the elastic restoring force of the right elastic portion 8, the outer peripheral surface of the right elastic portion 8 tightly adheres to and elastically contacts the inner peripheral surface of the first through hole 2, thereby supporting the elastic nut assembly 6 on the inner peripheral surface of the first through hole 2 and preventing it from falling out.

[0022] As Figure 9 and Figure 10As shown, the right elastic part 8 includes a shrapnel body 811 and a shrapnel connecting piece arranged on the shrapnel body. The shrapnel body 811 is connected to the left nut part 7 through the shrapnel connecting piece. In this embodiment, the shrapnel connecting piece is an upper card 812 arranged at the top of the shrapnel body 811 and a lower card 813 arranged at the bottom of the shrapnel body 811. When connecting the left nut part 7, as Figure 8 shown, the left nut part 7 is clamped at the position 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 into one body. The shrapnel body and the shrapnel connecting piece are connected into one body through the above clamping structure, which simplifies the assembly structure. The outer side surface of the shrapnel body 811 is the outer peripheral surface of the right elastic part 8. The shape of the outer side surface of the shrapnel body 811 matches the shape of the inner peripheral surface of the first through hole 2. Since in this embodiment, the inner peripheral surface of the first through hole 2 is circular, correspondingly, the outer side surface of the shrapnel body 811 is set as an arc surface. Here, when the inner peripheral surface of the first through hole 2 is square, the outer side surface of the shrapnel body 811 can also be set as square. In order to support the elastic nut assembly 6 on the inner peripheral surface of the first through hole 2 through the elastic deformation of the outer peripheral surface of the right elastic part 8, the size of the shrapnel body 811 is slightly larger than the size of the first through hole 2. In this embodiment, the radius of the shrapnel body 811 is slightly larger than the radius of the first through hole 2, so that when the elastic nut assembly 6 is placed into the first through hole 2, the shrapnel body 811 can be squeezed and elastically deformed. After the elastic nut assembly 6 is placed into the first through hole 2, under the action of the restoring force of the elastic force, the outer side surface of the shrapnel body 811 elastically abuts against the inner peripheral surface of the first through hole 2, and the whole elastic nut assembly 6 is supported in the first through hole 2 and will not fall off. In addition, along the axial direction, an elastic deformation gap L1 is left between the shrapnel body 811 and the left nut part 7, so that when the outer side surface of the shrapnel body 811 is squeezed and deformed by the first through hole 2, the elastic deformation gap L1 can ensure that the shrapnel body 811 has enough deformation space when elastically deforming.

[0023] As Figure 11 and Figure 12As shown, the left nut portion 7 includes a hollow nut seat 9 and a nut sleeve 10 connected to one side of the nut seat 9. The elastic deformation gap L1 is provided at the position between the nut seat 9 and the elastic sheet body 811. The nut seat 9 includes a hollow seat body 911, a top plate 912 provided on one side of the seat body 911, and a bottom plate 913 provided on one side of the seat body 911. The other side surface of the seat body 911 is the outer side surface of the seat body 911, and the outer side surface of the seat body 911 is the outer peripheral surface of the left nut portion 7. The shape of the outer side surface of the seat body 911 matches the shape of the inner peripheral surface of the first through hole 2. Since in this embodiment, the inner peripheral surface of the first through hole 2 is circular, correspondingly, the outer side surface of the seat body 911 is provided as an arc surface. Here, when the inner peripheral surface of the first through hole 2 is square, the outer side surface of the seat body 911 can also be provided as a square. The size of the seat body 911 matches the size of the first through hole 2, so that when the elastic nut assembly 6 is placed into the first through hole 2, the outer side surface of the seat body 911 contacts the inner peripheral surface of the first through hole 2. In addition, the matching of the shape of the outer side surface of the seat body 911 with the shape of the inner peripheral surface of the first through hole 2 also forms a first rotational limiting structure for the left nut portion 7 between the seat body 911 and the first through hole 2, preventing the left nut portion 7 from rotating when the bolt is tightened during work. When the left nut portion is connected to the right elastic portion, the left nut portion 7 is engaged between the upper card 812 and the lower card 813, so that the top plate 912 of the left nut portion 7 contacts the upper card 812, and the bottom plate 913 of the left nut portion 7 contacts the lower card 813, thereby connecting the left nut portion 7 and the right elastic portion 8 into one body.

[0024] As Figure 11 and Figure 13As shown, the nut sleeve 10 includes a sleeve body 101 and a sleeve flange 102 provided at one end of the sleeve body 101. The sleeve body 101 and the sleeve flange 102 are of an integral structure. A thread 11 is provided on the inner circumferential surface of the sleeve body 101. The inner cavity 103 of the sleeve body 101 communicates with the inner cavity 914 of the seat body 911, and the inner cavity 103 of the sleeve body and the inner cavity 914 of the seat body are located on the same central axis. During operation, the bolt rod portion of the bolt extends into the inner cavity 914 of the seat body from the inner cavity 103 of the sleeve body. An inner conical surface 12 is further provided on the inner circumferential surface of the sleeve body 101 and near the side of the sleeve flange 102. When the bolt rod portion 411 extends in and the central axis of the bolt rod portion 411 has some deviation from the central axis of the sleeve body 101, during the process of the bolt rod portion 411 extending in, by using the contact and cooperation between the end portion of the bolt rod portion 411 and the inner conical surface 12, the position of the elastic nut assembly can be automatically adjusted, so that the elastic nut assembly moves axially by some positions for fine adjustment, making the central axis of the bolt rod portion 411 coincide with the central axis of the sleeve body 101, ensuring that the bolt rod portion 411 can smoothly enter the inner cavity of the sleeve body 101 and be in threaded connection with the thread 11, thus ensuring the smooth progress of the work.

[0025] As Figure 12 and Figure 13 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 first retaining rod 13 and a second retaining rod 14 are respectively provided on the top plate 912 and the bottom plate 913 of the nut seat 9. During connection, first place the nut sleeve 10 on one side of the nut seat 9, and then connect the first retaining rod 13 and the second retaining rod 14 to the top plate 912 and the bottom plate 913 of the nut seat 9 respectively, so that one side surface 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 first retaining rod 13 and the second retaining rod 14 are in contact with the other side surface of the sleeve flange 102 of the nut sleeve 10. One function of the two retaining rods is to connect the nut sleeve. Another function is that during the working process, the bolt will generate an axial moving force on the nut sleeve. By using the first retaining rod 13 and the second retaining rod 14 to block in the axial moving direction of the nut sleeve, the problem of axial movement of the nut sleeve is avoided, ensuring the normal progress of the work. Here, in order to simplify the connection structure between the retaining rod and the nut seat, in this embodiment, a first retaining rod mounting hole 15 and a second retaining rod mounting hole (not shown in the figure) are respectively formed on the top plate 912 and the bottom plate 913. During connection, first use an elastic metal sheet (such as an iron sheet, a steel sheet, etc.) to roll into the first retaining rod 13 and the second retaining rod 14, and then insert one end of the rolled first retaining rod 13 and one end of the rolled second retaining rod 14 into the first retaining rod mounting hole 15 and the second retaining rod mounting hole respectively. In this way, by using the elastic restoring force of the rolled elastic metal sheet, one end of the first retaining rod 13 and one end of the second retaining rod 14 are expanded and clamped in the first retaining rod mounting hole 15 and the second retaining rod mounting hole, thus greatly simplifying the connection structure.

[0026] As Figure 14 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. The shape of the outer peripheral surface of the sleeve flange 102 matches the shape of the sleeve installation space 16. When connecting, after the sleeve flange 102 is placed into the sleeve installation space 16, a second rotational limiting structure for the nut sleeve is formed by the cooperation between the sleeve flange 102 and the sleeve installation space 16. The shape of the outer peripheral surface of the sleeve flange 102 can be set as a polygon. In this embodiment, the shape of the outer peripheral surface of the sleeve flange 102 is set as a square. Therefore, the sleeve installation space 16 is also set as a square. Such a setting is mainly to prevent the nut sleeve 10 from rotating circumferentially during work, which is convenient for tightening the bolt. During work, the rotation of the nut sleeve is restricted by the second rotational limiting structure formed between the sleeve flange 102 and the sleeve installation space 16 in sequence, and the first rotational limiting structure for the left nut part is formed between the seat body and the through hole 1. Thus, the through hole 1 finally realizes the function of rotationally limiting the elastic nut assembly 6.

[0027] As Figure 8 and Figure 9 shown, a cavity 8111 is formed in the elastic sheet body 811. A positioning disc 17 is arranged in the cavity 8111 of the elastic sheet body 811. The positioning disc 17 is connected to the elastic sheet 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 and the central axis of the inner cavity 103 of the nut sleeve 10 may not coincide either, mainly for positioning purposes. As Figures 3 to 5 shown, a positioning through hole 19 is further arranged on the workpiece 1 at a position corresponding to the through hole 2. The positioning through hole 19 is communicated with the through hole 1, and the central axis of the positioning through hole 19 coincides with the central axis of the through hole 2. Here, the central axis of the positioning through hole 19 and the central axis of the through hole 2 may not coincide either, mainly for positioning purposes. The shape of the positioning disc 17 on the elastic sheet body 811 matches the shape of the positioning through hole 19.

[0028] During operation, when the elastic nut assembly 6 is moved downward in the first through hole 2, due to the narrow space, it is difficult to observe whether the elastic nut assembly 6 has moved downward in place. Therefore, a positioning through hole 19 is provided at the position opposite to the second through hole 3. During the downward movement of the elastic nut assembly 6, when the positioning disc 17 on the elastic piece body 811 is caught in the positioning through hole 19, it means that the elastic nut assembly 6 has moved downward in place. At this time, the inner cavity 103 of the nut sleeve 10, the inner cavity 914 of the seat body, and the second through hole 3 are located on the same central axis. After the elastic nut assembly 6 has moved downward in place, the bolt rod portion 411 of the bolt is then inserted through the second through hole 3 into the inner cavity 914 of the seat body and the inner cavity 103 of the nut sleeve 10 for assembly, which can further reduce the working intensity and improve the working efficiency.

[0029] In summary, by designing the specific structure of the elastic nut assembly, the present invention enables it to be elastically supported in the first through hole and not fall off, and it can only move axially in the first through hole and cannot rotate, so that the bolt can be locked conveniently and quickly in a narrow installation space, reducing the working intensity and improving the working efficiency. By providing an inner conical surface on the inner circumferential surface of the sleeve body and using the end of the bolt rod portion to contact and cooperate with the inner conical surface, the position of the elastic nut assembly can be automatically adjusted, enabling the elastic nut assembly to move axially by some positions for fine adjustment, so that the central axis of the bolt rod portion coincides with the central axis of the sleeve body, ensuring that the bolt rod portion can smoothly enter the inner cavity of the sleeve body and be threadedly engaged, thus ensuring the smooth progress of the work. By designing the stop rod, one function is to connect the nut sleeve, and the other function is that during the working process, the bolt will generate an axial moving force on the nut sleeve. By using the first stop rod and the second stop rod to block in the axial moving direction of the nut sleeve, the problem of axial movement of the nut sleeve is avoided, ensuring the normal progress of the work. By providing a positioning structure formed by the cooperation of the positioning disc and the positioning through hole, the working intensity can be further reduced and the working efficiency can be improved.

[0030] The term "a plurality of" in the embodiments refers to a quantity of "two or more". The above embodiments are only for illustrating the present invention and not for limiting the present invention. Those skilled in the relevant technical fields can make various changes or transformations without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the protection scope of the present invention, and the protection scope of the present invention should be defined by each claim.

Claims

1. An elastic nut assembly for locking a bolt to a workpiece in a narrow space, wherein a through hole is opened on the workpiece, and wherein: The elastic nut assembly is columnar, comprising a left nut portion and a right elastic portion connected to the left nut portion, and the left nut portion and the right elastic portion are both semicircular; When the elastic nut assembly is placed in the through hole one, the outer circumference of the left nut part contacts the inner circumference of the through hole one, and the outer circumference of the right elastic part tightly and elastically contacts the inner circumference of the through hole one.

2. The elastic nut assembly according to claim 1, characterized in that: The right elastic part includes a leaf spring body, an upper card arranged at the top of the leaf spring body and a lower card arranged at the bottom of the leaf spring body; the left nut part is clamped between the upper card and the lower card, so that the left nut part and the right elastic part are connected as a whole.

3. The elastic nut assembly according to claim 2, characterized in that: Along the axial direction, an elastic deformation gap L1 is left between the spring body and the left nut portion.

4. The elastic nut assembly according to claim 3, characterized in that: A spring body cavity is opened on the spring body, and 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, and the positioning through hole is connected with the through hole 1. The shape of the positioning disc on the spring body matches the shape of the positioning through hole, and the positioning disc is inserted into the positioning through hole to form a positioning structure.

5. The elastic nut assembly 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, and the other side surface of the seat body is the outer circumferential surface of the left nut part, and the shape of the outer side surface of the seat body matches the shape of the inner circumferential surface of through hole one. The shape of the outer side surface of the seat body matches the shape of the inner circumferential surface of through hole one, and a rotation limiting structure for the left nut part is formed between the seat body and through hole one.

6. The elastic nut assembly 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, the sleeve body and the sleeve body flange are an integral structure, 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 on the same central axis.

7. The elastic nut assembly according to claim 6, characterized in that: A first stopper and a second stopper are respectively arranged on the top plate and the bottom plate of the nut seat; One side of the sleeve flange of the nut sleeve contacts the seat body of the nut seat, and the first and second stopper rods contact the other side of the sleeve flange of the nut sleeve, thereby connecting the nut sleeve to one side of the nut seat.

8. The elastic nut assembly according to claim 7, characterized in that: A baffle rod mounting hole 1 and a baffle rod mounting hole 2 are respectively opened on the top plate and the bottom plate. The baffle rod 1 and the baffle rod 2 are rolled from elastic metal sheets. One end of the rolled baffle rod 1 and one end of the baffle rod 2 are respectively inserted into the baffle rod mounting hole 1 and the baffle rod mounting hole 2, so that one end of the baffle rod 1 and one end of the baffle rod 2 are expanded and clamped in the baffle rod mounting hole 1 and the baffle rod mounting hole 2.

9. The elastic nut assembly according to claim 6, characterized in that: The seat body, top plate and bottom plate are combined 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.

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